Battery device and electric device

Abstract

The application belongs to the technical field of batteries, and particularly relates to a battery device and a power utilization device. The battery device is used for supplying power to a load. The battery device comprises a box body, a first battery pack and a second battery pack. The box body has an output interface. The output interface is used for connecting to a power supply loop of the load. The first battery pack is located in the box body. The first battery pack comprises a plurality of first battery monomers. The plurality of first battery monomers are electrically connected to each other and form a first total wiring terminal. The second battery pack is located in the box body. The second battery pack comprises a plurality of second battery monomers. The plurality of second battery monomers are electrically connected to each other and form a second total wiring terminal. The first total wiring terminal and the second total wiring terminal are electrically connected to the output interface. The first total wiring terminal and the second total wiring terminal are both configured to be capable of being connected and disconnected with the load.

Description

Technical Field

[0001] This application belongs to the field of battery technology, and in particular relates to a battery device and an electrical device. Background Technology

[0002] With the rising demand for clean energy, battery devices have seen widespread development. Battery devices can store electrical energy and are widely used in electrical appliances such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools.

[0003] To increase the capacity of battery devices, multiple battery packs are usually installed inside the device. However, when one of the battery packs malfunctions and fails to provide power, the battery device cannot provide power to the load in the device, causing the device to become unusable. Therefore, how to solve this problem has always been an important research topic in the development of battery devices.

[0004] The above statements are for the purpose of providing background information in relation to this application only and do not necessarily constitute prior art. Utility Model Content

[0005] The purpose of this application is to provide a battery device and an electrical device, in which at least one battery pack in the battery device can continue to supply power to the load when one battery pack malfunctions.

[0006] The technical solution adopted in the embodiments of this application is: In some embodiments, a battery device is used to supply power to a load, wherein the battery device includes: The enclosure has an output interface for connecting the power supply circuit of the load; The first battery pack is located inside the box. The first battery pack includes multiple first battery cells, which are electrically connected to each other and form a first main terminal. The second battery pack is located inside the box. The second battery pack includes multiple second battery cells, which are electrically connected to each other to form a second main terminal. The first and second main terminals are electrically connected to the output interface, and both the first and second main terminals are configured to connect and disconnect from the load.

[0007] In some embodiments, the load includes a first load, the output interface includes a first output interface for connecting a power supply circuit to the first load, a first main terminal and a second main terminal are electrically connected to the first output interface, and both the first battery pack and the second battery pack are capable of providing a first voltage to the first load, the first voltage range being greater than or equal to 150V.

[0008] In some embodiments, the first main terminal and the second main terminal are electrically connected to the first load via a switching module, the switching module being configured to enable at least one of the following power supply modes: Power supply mode 1: Switching from power supply state 1 to power supply state 2; Power supply mode two: Switching from power supply state one to power supply state three; Power supply mode three: switching from power supply state one to power supply state two and switching from power supply state one to power supply state three; Power supply mode four: Switching between power supply state two and power supply state three; Power supply mode five: Switching from power supply state four to power supply state five; Power supply mode six: Switching from power supply state four to power supply state six; Power supply mode seven: Switching between power supply state one and power supply state four; In the first power supply state, the first battery pack and the second battery pack are connected in parallel to supply power to the first load. Power supply state two: The first battery pack supplies power to the first load, and the second battery pack is disconnected from the first load; Power supply state three: The second battery pack supplies power to the first load, and the first battery pack is disconnected from the first load; Power supply state four: The first battery pack and the second battery pack are connected in series to supply power to the first load; Power supply state five: Disconnect the first battery pack and the second battery pack from series, and connect the first battery pack and the first load; Power supply state six: Disconnect the first battery pack and the second battery pack from series, and connect the second battery pack and the first load.

[0009] In some embodiments, the switch module includes; The first switch is connected to the first main terminal and is used to control the power supply circuit of the first battery pack to the first load. The second switch, connected to the second main terminal, is used to control the power supply circuit of the second battery pack to the first load.

[0010] In some embodiments, the switch module includes: The third switch connects to the first pole of the first main terminal and the second pole of the second main terminal, and is used for on / off control of the series circuit of the first battery pack and the second battery pack.

[0011] In some embodiments, at least one of the first main terminal and the second main terminal is electrically connected to the first load through a first voltage conversion module, which is used to convert the voltage of the corresponding main terminal into a first voltage.

[0012] In some embodiments, the first main terminal is used to connect to the first load and to provide a first voltage to the first load through the first battery pack; The second main terminal provides the first voltage to the first load through the first voltage conversion module.

[0013] In some embodiments, the first voltage conversion module is a unidirectional voltage conversion module; or The first voltage conversion module is a bidirectional voltage conversion module.

[0014] In some embodiments, the load includes a second load, the output interface includes a second output interface for accessing a power supply circuit of the second load, at least one of a first main terminal and a second main terminal is electrically connected to the second output interface, and at least one of a first battery pack and a second battery pack is capable of providing a second voltage to the second load, the second voltage being less than or equal to 60V.

[0015] In some embodiments, at least one of the first main terminal and the second main terminal is electrically connected to the second load through a second voltage conversion module, which is used to convert the voltage of the corresponding main terminal into a second voltage.

[0016] In some embodiments, the second voltage conversion module is a unidirectional voltage conversion module; or The second voltage conversion module is a bidirectional voltage conversion module.

[0017] In some embodiments, the load includes a first load and a second load, and a first main terminal and a second main terminal are used to connect the first load to output a first voltage to the first load; The first and second main terminals are connected to the second voltage conversion module, and are used to output a second voltage to the second load through the second voltage conversion module. The first voltage is greater than the second voltage.

[0018] In some embodiments, the load includes a first load and a second load, and a first main terminal is used to connect to the first load to output a first voltage to the first load; The first main terminal is connected to the second voltage conversion module, and is used to output the second voltage to the second load through the second voltage conversion module; The second main terminal is connected to the first voltage conversion module and is used to output the first voltage to the first load through the first voltage conversion module. The second main terminal is used to connect to the second load to output a second voltage to the second load, where the first voltage is greater than the second voltage.

[0019] In some embodiments, the load includes a first load and a second load, and a first main terminal and a second main terminal are used to connect the first load to output a first voltage to the first load; The second main terminal is connected to the second voltage conversion module, and is used to output a second voltage to the second load through the second voltage conversion module. The first voltage is greater than the second voltage.

[0020] In some embodiments, the load includes a first load and a second load, and a first main terminal is used to connect to the first load to output a first voltage to the first load; The second main terminal is used to connect to the second load to output a second voltage to the second load; The second main terminal is connected to the first voltage conversion module and is used to output a first voltage to the first load through the first voltage conversion module. The first voltage is greater than the second voltage.

[0021] In some embodiments, the enclosure further includes an input interface for connecting to a charging circuit via a power grid; a first main terminal and a second main terminal are electrically connected to the charging circuit via a switching module configured to enable at least one of the following charging modes: Charging Mode 1: Switches between Charging State 1 and Charging State 2; or Charging Mode 2: Switches between Charging State 1 and Charging State 3; Among them, charging state one: the first battery pack and the second battery pack are connected in series to the charging circuit; Charging state two: Disconnect the first battery pack and the second battery pack from the series connection, and connect the second battery pack or the first battery pack to the charging circuit; Charging state three: Disconnect the first battery pack and the second battery pack from the series connection, connect the first battery pack and the second battery pack in parallel, and connect them to the charging circuit.

[0022] In some embodiments, the first main terminal and the second main terminal are connected through a first voltage conversion module, and the second battery pack is also used to supply power to the first battery pack through the first voltage conversion module.

[0023] In some embodiments, the first battery pack is also used to charge the second battery pack via a first voltage conversion module.

[0024] In some embodiments, the battery device further includes: The first main terminal and the second main terminal are connected through a switch module, which is used to control the first battery pack and the second battery pack to be connected in series.

[0025] In some embodiments, the first voltage conversion module includes a first voltage conversion element; The first voltage converter is connected to the first main terminal and the second main terminal respectively; The first battery pack charges the second battery pack through the first voltage converter, or the second battery pack charges the first battery pack through the first voltage converter.

[0026] In some embodiments, the battery device further includes a battery information management component, which is also configured to control the second battery pack to charge the first battery pack through the first voltage conversion module in a first preset state. The first preset state includes at least one of the following states: (1) When the remaining charge of the first battery pack is lower than the charge threshold; (2) When the remaining charge of any one of the first battery cells in the first battery pack is less than the first threshold; (3) The voltage of any one of the first battery cells in the first battery pack is lower than the second threshold.

[0027] In some embodiments, the load includes a first load, and the battery device further includes a battery information management component. The battery information management component is also used to control the second battery pack to charge the first battery pack through the first voltage conversion module and control the first battery pack to provide a first voltage to the first load in a second preset state. The second preset state includes the first battery pack outputting a first voltage to the first load, and at least one of the following states: (1) When the remaining charge of the first battery pack is less than 30%; (2) When the remaining charge of any one of the first battery cells in the first battery pack is less than the first threshold; (3) The voltage of any one of the first battery cells in the first battery pack is lower than the second threshold.

[0028] In some embodiments, the second battery pack includes at least one negative electrode-free battery cell; The battery device includes a thermal management component and a battery information management component, the thermal management component being used to regulate the temperature of the second battery pack; The battery information management component is used to control the thermal management component to regulate the battery temperature of the second battery pack to be greater than 40°C when the second battery pack is in the charging state. The load includes a first load, and a battery device is used to connect to the first load; a first battery pack and a second battery pack are connected, and the second battery pack is used to output a first voltage to the first load.

[0029] In some embodiments, the battery device further includes a battery information management component, the second battery pack includes at least one negative electrode-free battery cell, and the second main terminal is connected to the first voltage conversion module; The battery information management component is used to control the first voltage conversion module to charge the second battery pack at a first rate ≤ 1C when the battery device is in charging condition.

[0030] In some embodiments, the battery device further includes a first power distribution device, a first main terminal and a second main terminal are electrically connected to the first power distribution device via a switch module, the first power distribution device is electrically connected between the load and the switch module, and the switch module is integrated within the first power distribution device.

[0031] In some embodiments, the switch module is located inside the enclosure, and the first main terminal and the second main terminal are electrically connected to the first output interface through the switch module.

[0032] In some embodiments, the housing includes a battery cavity and an electrical cavity, with the first battery pack and the second battery pack located in the battery cavity; the switch module is located in either the battery cavity or the electrical cavity.

[0033] In some embodiments, the first voltage conversion module is located inside the enclosure, and at least one of the first main terminal and the second main terminal is electrically connected to the first output interface through the first voltage conversion module.

[0034] In some embodiments, the second voltage conversion module is located inside the enclosure, and at least one of the first main terminal and the second main terminal is electrically connected to the second output interface through the second voltage conversion module.

[0035] In some embodiments, the first main terminal and the second main terminal are located on the same side of the first battery pack and the second battery pack.

[0036] In some embodiments, the housing is provided with a battery cavity, which includes a first battery cavity and a second battery cavity. A first battery pack is disposed in the first battery cavity, and a second battery pack is disposed in the second battery cavity. A partition structure is provided between the first battery cavity and the second battery cavity. The partition structure is capable of blocking at least a portion of the emissions emitted by at least one of the first battery pack and the second battery pack in the event of thermal runaway.

[0037] In some embodiments, the partition structure is configured to seal and isolate the first battery cavity and the second battery cavity.

[0038] In some embodiments, the housing includes a tray and a cover, the cover being disposed opposite to the tray along a first direction, and the cover covering the tray; The partition structure divides the housing into a first battery compartment and a second battery compartment, and the partition structure is connected to the cover and the tray on opposite sides along the first direction, respectively.

[0039] In some embodiments, the cover seals the first battery cavity and the second battery cavity, and the partition structure further includes a seal, with a seal provided between the partition structure and the cover and / or between the cover and the tray.

[0040] In some embodiments, the cover includes a first cover and a second cover, the first cover sealing a first battery cavity and the second cover sealing a second battery cavity.

[0041] In some embodiments, the enclosure is further provided with an electrical cavity for accommodating electrical components, at least some of the electrical components are electrically connected to a first main terminal and an output interface, at least some of the electrical components are electrically connected to a second main terminal and an output interface, and the output interface passes through the cavity wall of the electrical cavity.

[0042] In some embodiments, the load includes a first load, and the output interface includes a first output interface for connecting a power supply circuit to the first load; the electrical component includes a first voltage conversion module, and at least one of a first main terminal and a second main terminal is electrically connected to the first output interface through the first voltage conversion module to provide a first voltage to the first load, the first voltage range being greater than or equal to 150V; and / or The load includes a second load, and the output interface includes a second output interface for connecting the power supply circuit of the second load; the electrical components include a second voltage conversion module, and at least one of the second main terminals is electrically connected to the second output interface through the second voltage conversion module to provide a second voltage to the second load, the second voltage being less than or equal to 60V.

[0043] In some embodiments, the housing is provided with an electrical cavity partition, which is used to seal and isolate the electrical cavity from the first battery cavity and / or the second battery cavity; The electrical cavity partition is provided with a mounting hole, and the battery device also includes an adapter. The adapter is sealed and passes through the mounting hole. One end of the adapter is electrically connected to at least one of the first main terminal and the second main terminal, and the other end of the adapter is electrically connected to an electrical component in the electrical cavity.

[0044] In some embodiments, the electrical cavity, the first battery cavity, and the second battery cavity are arranged in the same layer, or the electrical cavity and at least one of the first battery cavity and the second battery cavity are arranged in two layers.

[0045] In some embodiments, the first battery cavity and the second battery cavity are sealed and isolated from the electrical cavity. The first battery cavity, the second battery cavity, and the electrical cavity are each provided with a pressure balancing mechanism, and the first battery cavity and the second battery cavity are each provided with a pressure relief mechanism.

[0046] In some embodiments, the number of first battery chambers and second battery chambers can be one or more, wherein the arrangement of the first battery chambers and second battery chambers includes one or more of the following: Arrangement method 1: The first battery cavity and the second battery cavity are arranged along the length of the box; Arrangement Method Two: The first and second battery cavities are arranged along the width of the housing; Arrangement method three: The first battery cavity and the second battery cavity are arranged along the height direction of the box; Arrangement method four: One of the first battery compartment and the second battery compartment is located in one corner of the box; Arrangement method five: Several first battery chambers and several second battery chambers are arranged alternately.

[0047] In some embodiments, within the first battery cavity, a plurality of first battery cells are arranged along the length and / or width and / or height of the housing; Inside the second battery chamber, multiple first battery cells are arranged along the length and / or width and / or height of the housing.

[0048] In some embodiments, the housing is provided with at least one pressure relief mechanism, the housing is provided with a pressure relief chamber, the pressure relief mechanism is connected to the pressure relief chamber, the first battery chamber can be connected to the pressure relief chamber when the first battery pack experiences thermal runaway, and the second battery chamber can be connected to the pressure relief chamber when the second battery pack experiences thermal runaway.

[0049] In some embodiments, the housing includes side beams, and the hollow cavities within the side beams form pressure relief chambers; The pressure relief chamber is provided with a vent corresponding to the battery chamber. Each vent is provided with a sealing structure, which can be actuated under preset conditions to connect the battery chamber and the pressure relief chamber.

[0050] In some embodiments, the housing is provided with a first pressure relief mechanism and a second pressure relief mechanism, the first battery cavity is correspondingly arranged with the first pressure relief mechanism, and the second battery cavity is correspondingly arranged with the second pressure relief mechanism.

[0051] In some embodiments, the battery device further includes a thermal management component for thermal management of the first battery pack and / or the second battery pack.

[0052] In some embodiments, the thermal management component includes at least a first sub-thermal management component and a second sub-thermal management component, wherein the first sub-thermal management component is used to perform thermal management on a first battery pack and the second sub-thermal management component is used to perform thermal management on a second battery pack.

[0053] In some embodiments, the housing is provided with a first inlet and a first outlet communicating with the first sub-thermal management component, and a second inlet and a second outlet communicating with the second sub-thermal management component; or, the housing is provided with a third inlet and a third outlet communicating with the first sub-thermal management component and the second sub-thermal management component.

[0054] In some embodiments, the first sub-thermal management component and the second sub-thermal management component are integrally disposed. The first sub-thermal management component has a first heat exchange channel corresponding to the first battery pack, and the second sub-thermal management component has a second heat exchange channel corresponding to the second battery pack. The first heat exchange channel and the second heat exchange channel are independent of each other. Alternatively, the first sub-thermal management component and the second sub-thermal management component may be set up independently.

[0055] In some embodiments, the first battery pack and the second battery pack are arranged in two layers; The thermal management component is located between the first battery pack and the second battery pack.

[0056] In some embodiments, the housing includes a tray and a cover, the cover being disposed on one side of the tray along a first direction; The first and second battery cells are arranged alternately along a second direction, which is perpendicular to the first direction.

[0057] In some embodiments, a first exhaust channel corresponding to a first battery pack and a second exhaust channel corresponding to a second battery pack are formed inside the housing, and the exhaust paths of the first exhaust channel and the second exhaust channel are different; the first battery cell has a first cell pressure relief mechanism, which is configured to communicate with the first exhaust channel; the second battery cell has a second cell pressure relief mechanism, which is configured to communicate with the second exhaust channel.

[0058] In some embodiments, the first battery pack further includes a first bar, which connects two adjacent first battery cells arranged along a second direction and is insulated from a second battery cell between the two first battery cells. The first battery pack also includes a second plate, which connects two adjacent second battery cells along a second direction and is insulated from the first battery cell between the two second battery cells.

[0059] In some embodiments, a first insulation sampling structure for acquiring insulation voltage is connected to a first main terminal, and a second insulation sampling structure for acquiring insulation voltage is connected to a second main terminal.

[0060] In some embodiments, the battery device further includes a first battery information management component and a second battery information management component, wherein the first battery information management component is used to monitor and / or manage the status of individual battery cells in the first battery pack, and the second battery information management component is used to monitor and / or manage the status of individual battery cells in the second battery pack.

[0061] In some embodiments, the first battery information management component includes a first cell monitoring circuit component, a first battery pack control circuit board, and a first battery management circuit board component, and the second battery information management component includes a second cell monitoring circuit component, a second battery pack control circuit board, and a second battery management circuit board component.

[0062] In some embodiments, the first battery cell and the second battery cell may be a prismatic battery cell, a cylindrical battery cell, or a blade battery cell, respectively.

[0063] In some embodiments, at least one of the first battery pack and the second battery pack is detachably connected to the housing.

[0064] In some embodiments, the first battery pack is detachably connected to the housing, and the first battery cell is a primary battery; and / or, the second battery pack is detachably connected to the housing, and the second battery cell is a primary battery.

[0065] In some embodiments, the first battery cell and the second battery cell each independently include one or more of a secondary battery, a supercapacitor, and a primary battery, and at least one of the first battery cell and the second battery cell includes a secondary battery. Optionally, both the first battery cell and the second battery cell include a secondary battery; Further optionally, the secondary battery includes one or more of the following: lithium secondary battery, sodium secondary battery, flow battery, lead-acid battery, nickel-cadmium battery, nickel-metal hydride battery, zinc halide battery, and air battery; the supercapacitor includes one or more of the following: electric double-layer capacitor, pseudocapacitor, and hybrid supercapacitor; and the primary battery includes one or more of the following: lithium primary battery, zinc-manganese dry cell battery, silver-zinc battery, lithium iron battery, and fuel cell.

[0066] In some embodiments, the chemical systems of the first battery cell and the second battery cell are different.

[0067] In some embodiments, the volumetric energy density of the first battery cell is in the range of 200Wh / L to 800Wh / L, and the total capacity of the first battery pack is not less than 40kWh. The second battery pack meets one of the following conditions: (1) When the volumetric energy density of the second battery cell is in the range of 200Wh / L to 800Wh / L, the total capacity of the second battery pack is not less than 20kWh; (2) When the volumetric energy density of the second battery cell is in the range of 800Wh / L to 1200Wh / L, the total capacity of the second battery pack is not less than 40kWh; (3) When the volumetric energy density of the second battery cell is in the range of 1200Wh / L to 2000Wh / L, the total capacity of the second battery pack is not less than 60kWh.

[0068] In some embodiments, the volume ratio of the first battery pack to the second battery pack is 0.05 to 10, optionally, the volume ratio is 0.1 to 8.0, and optionally, the volume ratio is 0.12 to 6.0.

[0069] In some embodiments, the first battery cell and the second battery cell are each independently selected from any one or more of the following battery cells I to VII: (1) Battery cell I, wherein the volumetric energy density of battery cell I is in the range of 450Wh / L to 2000Wh / L, and battery cell I includes at least one of lithium iron phosphate-graphite lithium-ion battery cell, lithium manganese iron phosphate-graphite lithium-ion battery cell, ternary-graphite lithium-ion battery cell, hybrid cathode lithium-ion battery cell, lithium-ion negative electrode-free battery cell, semi-solid-state battery cell, and all-solid-state battery cell; optionally, the negative electrode active material in the ternary-graphite lithium-ion cell also includes silicon-based material; the positive electrode active material of the hybrid cathode lithium-ion battery cell includes two or more of lithium iron phosphate, lithium manganese iron phosphate, and lithium nickel cobalt manganese oxide; optionally, at least one battery cell I is a lithium-ion negative electrode-free battery cell; (2) Battery cell II, at 25°C, the equivalent charging rate of battery cell II at 10%SOC-80%SOC is greater than or equal to 2C, optionally, the equivalent charging rate of battery cell II at 10%SOC-80%SOC is greater than 2.5C, and further optionally, the equivalent charging rate of battery cell II at 10%-80%SOC is greater than 4C; (3) Battery cell III, the thermal runaway temperature of battery cell III is not lower than 250°C; and / or, the overcharge boundary of battery cell III is not lower than 140% SOC; (4) Battery cell IV, wherein the charging time of battery cell IV from 10% SOC to 80% SOC at an ambient temperature of -10℃ is less than or equal to 40 min; and / or, the capacity retention rate of battery cell IV at an ambient temperature of -20℃ and charged at 0.33C is above 80%; and / or, battery cell IV includes at least one of sodium-ion battery cell, sodium-ion battery cell without negative electrode, sodium metal battery cell, lithium iron phosphate lithium-ion battery, ternary lithium-ion battery cell, and hybrid cathode lithium-ion battery cell, wherein the positive electrode active material of the hybrid cathode lithium-ion battery cell includes two or more of lithium iron phosphate, lithium manganese iron phosphate, and lithium-containing transition metal oxides; (5) Battery cell V, when discharged to the lower cutoff voltage at a rate of 5C at 50% SOC, the discharge time of battery cell V is greater than or equal to 30s, preferably greater than or equal to 60s, and preferably greater than or equal to 100s; and / or, when discharged at 3.5C for 10s at 50% SOC, the DC impedance DCR of battery cell V is less than 0.4mΩ, preferably less than 0.3mΩ; and / or, the power density of battery cell V is not less than 500W / kg, and optionally between 600 W / kg and 5000W / kg; (6) Battery cell VI, when the battery cell VI is cycled to 70% SOH, the number of cycles of battery cell VI shall not be less than 6000 cycles; optionally, not less than 6500 cycles; (7) Battery cell VII, the capacity retention rate of the second battery cell is not less than 95% after being stored at an ambient temperature of 45°C for 90 days; and / or, the capacity retention rate of the second battery cell is not less than 98% after being stored at an ambient temperature of 60°C for 60 days.

[0070] In some embodiments, the energy density of a single lithium-ion electrodeless battery cell is 450Wh / L to 2000Wh / L; and / or, The positive electrode active material of a lithium-ion battery cell without a negative electrode is one or more of the following: olivine phase lithium phosphate, layered lithium transition metal oxide, and spinel phase lithium manganese-based oxide. Optionally, the olivine phase lithium phosphate includes at least one of lithium iron phosphate and lithium manganese iron phosphate; Optionally, the ratio of the number of moles of nickel to the total number of moles of transition metal elements in the layered lithium-containing transition metal oxide is 0.5 or more, and more preferably 0.7 or more.

[0071] In some embodiments, a single lithium-ion electrodeless battery cell meets at least one of the following conditions: (1) The positive electrode active material of lithium-ion non-negative electrode battery cells includes lithium iron phosphate, and the volumetric energy density of lithium-ion non-negative electrode battery cells ranges from 450 to 700 Wh / L. (2) The positive electrode active material of the lithium-ion battery cell without negative electrode includes two or more of lithium iron phosphate, lithium manganese iron phosphate, and lithium-containing transition metal oxides, and the volumetric energy density of the lithium-ion battery cell without negative electrode ranges from 600 to 1000 Wh / L. (3) The positive electrode active material of the lithium-ion non-negative electrode battery cell includes lithium-containing transition metal oxides, and the volumetric energy density of the lithium-ion non-negative electrode battery cell ranges from 650 to 2000 Wh / L.

[0072] In some embodiments, the negative electrode of a lithium-ion electrodeless battery cell includes a current collector capable of conducting electrons, and the current collector satisfies at least one of the following conditions: (1) The material of the current collector is selected from at least one of carbon-based materials and metal foil; (2) The thickness range of the current collector is 3μm~8μm; (3) The surface roughness of the current collector is less than or equal to 0.3 μm; (4) The tensile strength of the current collector is 400MPa~1600MPa; (5) A lithium metal layer is provided on at least one side of the current collector. Optionally, the thickness of the lithium metal layer is in the range of 3μm-30μm, and even more preferably, the thickness of the lithium metal layer is in the range of 5μm-25μm.

[0073] In some embodiments, the cycle life of a lithium-ion electrodeless battery cell meets at least one of the following conditions: (1) The lithium-ion electrodeless battery is charged and discharged at 25°C with a charging rate of 0.2C / discharging rate of 1C and within 80% of the depth of discharge, and has a cycle life of 150~400 cycles. (2) The lithium-ion battery without negative electrode is charged and discharged at 25°C with a charging rate of 0.2C / discharging rate of 1C and a discharge depth of 50%, and the cycle life is 200~550 cycles. (3) The lithium-ion battery without negative electrode is charged and discharged at 25°C with a charging rate of 0.2C / discharging rate of 1C and a discharge depth of 30%, and the cycle life is more than 550 cycles.

[0074] In some embodiments, the volumetric energy density of the second battery cell is greater than that of the first battery cell, and the second battery pack includes at least battery cell I, and the second battery pack includes at least one or more of battery cells II, IV, and VI.

[0075] In some embodiments, the second battery pack includes at least one of the following: lithium iron phosphate battery without negative electrode, lithium manganese iron phosphate battery without negative electrode, ternary battery cell without negative electrode, hybrid cathode battery cell without negative electrode, all-solid-state battery, and semi-solid-state battery. The first battery pack includes at least one of the following: lithium iron phosphate lithium-ion battery, lithium manganese iron phosphate lithium-ion battery, ternary lithium-ion battery cell, hybrid cathode lithium-ion battery cell, sodium-ion battery, all-solid-state battery, and semi-solid-state battery.

[0076] In some embodiments, the equivalent charge rate of the first battery cell at 10% SOC-80% SOC is greater than the equivalent charge rate of the second battery cell at 10% SOC-80% SOC. The first battery pack includes at least battery cell II, and the second battery pack includes at least one or more of battery cells IV and VI.

[0077] In some embodiments, the first battery pack includes at least one of the following: lithium iron phosphate battery, lithium manganese iron phosphate battery, ternary lithium-ion battery cell, and hybrid cathode lithium-ion battery cell. The second battery pack includes at least one of the following: sodium-ion battery, lithium iron phosphate battery, lithium manganese iron phosphate battery, ternary lithium-ion cell, solid-state battery cell, and semi-solid-state battery cell.

[0078] In some embodiments, under the same charge and discharge conditions, the cycle life of the first battery cell is more than 1.2 times that of the second battery cell, the first battery pack includes at least battery cell VI, and the second battery pack includes at least one or more of battery cells IV and VII.

[0079] In some embodiments, the first battery pack includes at least one of the following: lithium iron phosphate battery, lithium manganese iron phosphate battery, ternary lithium-ion battery cell, and hybrid cathode lithium-ion battery cell. The second battery pack includes at least one of the following: sodium-ion battery, lithium iron phosphate battery, ternary lithium-ion battery, solid-state battery cell, and semi-solid-state battery cell.

[0080] In some embodiments, the electrical device includes the battery device described above.

[0081] In some embodiments, the electrical device includes a load disposed outside the enclosure and a third voltage conversion module, wherein the load includes a first load and a second load; The output interface includes a first output interface and a second output interface. The first main terminal and the second main terminal are electrically connected to the first output interface. The first output interface is connected to the power supply circuit of the first load. Both the first battery pack and the second battery pack can provide a first voltage to the first load. At least one of the first main terminal and the second main terminal is electrically connected to the second output interface. The second output interface is connected to the power supply circuit of the second load. At least one of the first battery pack and the second battery pack can provide a second voltage to the second load. The second voltage is less than the first voltage. The first output interface is connected to the power supply circuit of the second load through the third voltage conversion module, so as to convert the first voltage into the second voltage and provide the second voltage to the second load.

[0082] In some embodiments, the electrical device includes the battery device and the switch module described above. The switch module is located outside the housing, and the first output interface is electrically connected to the first load through the switch module.

[0083] In some embodiments, the electrical device includes the battery device described above and a first voltage conversion module. The first voltage conversion module is located outside the enclosure, and the first output interface is electrically connected to the first load through the first voltage conversion module.

[0084] In some embodiments, the electrical device includes the battery device described above and the second voltage conversion module. The second voltage conversion module is located outside the housing, and the second output interface is electrically connected to the second load through the second voltage conversion module.

[0085] In some embodiments, the electrical device includes the battery device described above, and the load includes a first load and a second load; the output interface is used to connect to the first load and the second load.

[0086] In some embodiments, the electrical device includes a vehicle, and the first load includes a drive system for driving the vehicle.

[0087] In some embodiments, the electrical device includes a vehicle, and the second load includes a vehicle control system for body control.

[0088] In some embodiments, the electrical device includes a vehicle, which further includes an on-board charger (OBC), a battery device connected to the OBC, and the OBC used to AC charge the vehicle.

[0089] In some embodiments, the electrical device includes a vehicle, which further includes an on-board battery for providing a second voltage to a second load.

[0090] The battery device provided in this application has at least one of the following technical effects: When the battery device is in use, both the first battery pack and the second battery pack can supply power to the load through the output interface, and both the first main terminal and the second main terminal are configured to be able to connect and disconnect from the load; when the first battery pack malfunctions, the first main terminal can be disconnected from the load, while the second main terminal is connected to the load, switching to the second battery pack independently supplying power to the load. Similarly, when the second battery pack malfunctions, the first battery pack can also independently supply power to the load, thereby realizing that if one of the first battery pack and the second battery pack malfunctions, the other can continue to supply power, enabling the load to operate, improving the reliability and stability of the entire battery device, and solving the problem that the power device cannot continue to be used when one battery pack malfunctions.

[0091] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0092] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0093] Figure 1 The diagram shows the structure of a vehicle provided in some embodiments of this application.

[0094] Figure 2 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application.

[0095] Figure 3This is a schematic diagram of the structure of a battery device provided in some other embodiments of this application.

[0096] Figure 4 Two schematic diagrams of the structure of an electrical device provided for some embodiments of this application.

[0097] Figure 5 Three circuit diagrams of a battery device provided for some embodiments of this application.

[0098] Figure 6 Two circuit diagrams of a battery device provided for some embodiments of this application.

[0099] Figure 7 The circuit diagrams of the battery devices provided in some embodiments of this application are shown.

[0100] Figure 8 The circuit diagrams of the battery devices provided in some embodiments of this application are shown.

[0101] Figure 9 The circuit diagrams of the battery devices provided in some embodiments of this application are shown.

[0102] Figure 10 For application Figure 9 A schematic diagram of the battery device in the circuit diagram.

[0103] Figure 11 The circuit diagrams of the battery devices provided in some embodiments of this application are shown.

[0104] Figure 12 The circuit diagrams of the battery devices provided in some embodiments of this application are shown.

[0105] Figure 13 The circuit diagrams of the battery devices provided in some embodiments of this application are shown.

[0106] Figure 14 The circuit diagrams of the battery devices provided in some embodiments of this application are shown.

[0107] Figure 15 For application Figure 14 The circuit schematic diagram shows the structure of the battery device.

[0108] Figure 16 The circuit diagrams of the battery device provided in some embodiments of this application are shown.

[0109] Figure 17 The circuit diagrams of the battery devices provided in some embodiments of this application are shown.

[0110] Figure 18 The circuit diagrams of the battery device provided in some embodiments of this application are shown.

[0111] Figure 19 Several structural diagrams of the battery device provided for some embodiments of this application.

[0112] Figure 20 Several structural diagrams of the battery device provided for some embodiments of this application.

[0113] Figure 21 Several structural diagrams of the battery device provided for some embodiments of this application.

[0114] Figure 22 Several structural diagrams of the battery device provided for some embodiments of this application are shown.

[0115] Figure 23 This is an exploded perspective view of a battery device provided in some embodiments of this application; Figure 24 for Figure 23 The battery device shown is a top view after the cover has been removed; Figure 25 for Figure 23 The diagram shows the structure of the battery device and electrical components. Figure 26 This is an exploded perspective view of a battery device provided in some other embodiments of this application; Figure 27 for Figure 26 A three-dimensional schematic diagram of the battery device after the cover has been removed; Figure 28 for Figure 27 A top view of the battery device shown; Figure 29 This is an exploded perspective view of a battery device provided in some other embodiments of this application; Figure 30 for Figure 29 The front view of the battery device shown; Figure 31 for Figure 30 A cross-sectional view of the battery device shown along line AA; Figure 32 This is an exploded perspective view of a battery device provided in some other embodiments of this application; Figure 33 Top view of a battery device provided for other embodiments of this application; Figure 34 This is one of the structural schematic diagrams of a first battery pack, a second battery pack, and a thermal management component provided in some embodiments of this application; Figure 35 A second schematic diagram illustrating the structure of a first battery pack, a second battery pack, and a thermal management component provided in some embodiments of this application; Figure 36 Third schematic diagram of the structure of the first battery pack, the second battery pack, and the thermal management component provided in some embodiments of this application; Figure 37A This is a schematic diagram of the structure of the tray in the box provided in some embodiments of this application; Figure 37B This application provides structural schematic diagrams of the cover body for some embodiments; Figure 38 This is a schematic diagram of the structure of the box provided in some other embodiments of this application; Figure 39 for Figure 38 The diagram shows the structure of the housing, the first battery pack, and the second battery pack. Figure 40 This is a schematic diagram of the battery cavity structure provided in some embodiments of this application; Figure 41 This is a schematic diagram of the battery pack structure provided in some embodiments of this application; Figure 42 This is a schematic diagram of the structure of a battery device provided in some other embodiments of this application; Figure 43 One of the schematic diagrams of the exhaust paths of the first and second battery cells provided in some embodiments of this application; Figure 44 This is a schematic diagram of the structure of a battery device provided in some other embodiments of this application; Figure 45 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application; Figure 46 A second schematic diagram of the exhaust paths of the first and second battery cells provided in some embodiments of this application; Figure 47 A third schematic diagram of the exhaust paths of the first and second battery cells provided for some embodiments of this application; Figure 48 A schematic diagram of the battery device provided for other embodiments.

[0116] Figure 49 Several structural diagrams of electrical devices provided for some embodiments of this application.

[0117] Figure 50 Structural diagrams of electrical devices provided in some embodiments of this application.

[0118] The following are the labeling elements in the figure: 1000, Vehicle; 1100, Battery Unit; 1200, Controller; 1300, Motor; 100, Housing; 101, Battery Chamber; 1011, First Battery Chamber; 1012, Second Battery Chamber; 102, Electrical Chamber; 110, First Housing; 120, Second Housing; 10, Tray; 11, Side Beam; 12, Pressure Relief Chamber; 141, First Inlet; 142, First Outlet; 143, Second Inlet; 144, Second Outlet; 20, Cover; 21, First Cover; 22, Second Cover; 30, Partition Structure; 40, Seal 50. Electrical cavity partition; 51. Adapter; 61. Pressure relief mechanism; 62. First pressure relief mechanism; 63. Second pressure relief mechanism; 70. Thermal management component; 71. First sub-thermal management component; 711. First heat exchange tube; 712. First current collector; 72. Second sub-thermal management component; 721. Second heat exchange tube; 722. Second current collector; 200. Electrical component; 210. Switch module; 220. First voltage conversion module; 230. Second voltage conversion module; 231. First voltage conversion device; 232. Second voltage conversion device; 2 40. First power supply circuit; 250. Second power supply circuit; 260. Third voltage conversion module; 270. Voltage conversion module; 280. Fourth voltage conversion module; 291. First power distribution device; 292. Second power distribution device; 293. Third power distribution device; 1001. Battery pack; 1002. Battery cell; 1003. Positive terminal; 1004. Negative terminal; 1005. Interface; 300. First battery pack; 310. First battery cell; 311. First cell pressure relief mechanism; 320. First main terminal; 321. First... Insulated sampling structure; 330, first tap; 400, second battery pack; 410, second battery cell; 411, second cell pressure relief mechanism; 420, second main terminal; 421, second insulated sampling structure; 430, second tap; 500, third battery pack; 600, fourth battery pack; 700, output interface; 710, first output interface; 7101, first sub-interface; 7102, second sub-interface; 720, second output interface; 800, input interface; 900, load; 910, first load; 920, second load. Detailed Implementation

[0119] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the appendices in the embodiments of this application will be described below. Figures 1-50 The technical solutions in the embodiments of this application are clearly and completely described. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0120] In the description of the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include at least one of that feature.

[0121] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0122] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0123] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0124] In the description of this application, it should be understood that the terms "inner", "outer", "side", "upper", "bottom", "front", "rear", etc., indicating the orientation or positional relationship are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0125] In the description of this application, it should be noted that the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0126] It should also be noted that in the embodiments of this application, the same reference numerals are used to represent the same component or part. For the same part in the embodiments of this application, the reference numerals may only be used to mark one part or component as an example. It should be understood that the reference numerals are also applicable to other identical parts or components.

[0127] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0128] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0129] With the rising demand for clean energy, battery devices have seen widespread development. Battery devices can store electrical energy and are widely used in electrical appliances such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools.

[0130] New energy electrical equipment generally includes high-voltage power supply systems and low-voltage power supply systems. High voltage can be greater than or equal to 150V, while low voltage can be less than or equal to 60V. For example, in electric vehicles, the high-voltage power supply system generally refers to the power system, typically powered by a high-voltage battery to supply high-voltage loads, such as a power battery. Its voltage platform is generally 400V, 800V, etc. The low-voltage power supply system typically uses a low-voltage battery as its power output to supply low-voltage loads, such as a low-voltage storage battery. Its voltage platform is generally 12V, 24V, 48V, etc.

[0131] With the development of intelligent driving technology, in some electric vehicles, high-voltage power supply systems can be used to provide power for the vehicle drive, low-voltage power supply systems can be used to provide power for the vehicle's low-voltage electrical appliances, and high-voltage power supply systems and / or low-voltage power supply systems can also provide power for the vehicle's intelligent driving system.

[0132] To increase the capacity of battery devices, multiple battery packs are usually installed inside the device. However, when one of the battery packs malfunctions and fails to provide power, the battery device cannot provide power to the load in the device, causing the device to become unusable. Therefore, how to solve this problem has always been an important research topic in the development of battery devices.

[0133] In particular, if one of the battery packs in a vehicle malfunctions and fails to provide power, the entire battery system will be unable to supply power to the vehicle, causing it to be unable to continue driving and potentially leading to traffic congestion and other problems.

[0134] Based on this, embodiments of this application provide a battery device, including a housing, a first battery pack, and a second battery pack. The housing has an output interface for connecting to the power supply circuit of a load. The first battery pack is located inside the housing and includes multiple first battery cells, which are electrically connected to each other and form a first main terminal. The second battery pack is located inside the housing and includes multiple second battery cells, which are electrically connected to each other and form a second main terminal. The first and second main terminals are electrically connected to the output interface, and both the first and second main terminals are configured to be able to connect and disconnect from the load.

[0135] In the battery device of this application embodiment, both the first battery pack and the second battery pack can supply power to the load through the output interface during use. Furthermore, both the first and second main terminals are configured to connect and disconnect from the load. This allows the first battery pack to connect to the load and supply power when it is operating normally. When the first battery pack malfunctions, the first main terminal can be disconnected from the load, while the second main terminal connects to the load, switching power supply to the load from the second battery pack. Similarly, when the second battery pack malfunctions, the first battery pack can still supply power to the load. This ensures that even if one battery pack malfunctions, the other can continue to supply power, allowing the load to operate. This improves the reliability and stability of the entire battery device and solves the problem of the device being unusable when one battery pack malfunctions.

[0136] Furthermore, this application provides a battery device that, through the coordinated design of the battery device and the power supply circuit, achieves redundant power supply for the high-voltage power supply system and the low-voltage power supply system, thereby improving the stability and reliability of the electrical device during use.

[0137] In the above embodiments, the battery device can provide redundant power to the first load through the first battery pack and the first power supply circuit, so that the first load in the electrical device has at least two independent power sources. When one power source malfunctions or fails, the other normal power source can continue to supply power to the first load, allowing the first load to continue operating normally without being affected by the malfunctioning power source. Similarly, the battery device can also provide redundant power to the second load through the second power supply circuit, so that the second load in the electrical device has at least two independent power sources. When one power source malfunctions or fails, the other normal power source can continue to supply power to the second load, allowing the second load to continue operating normally without being affected by the malfunctioning power source. By providing redundant backup power to the first and second loads of the electrical device, redundant power supply is achieved for both the high-voltage and low-voltage power supply systems, thereby improving the stability and reliability of the electrical device during use.

[0138] The abnormal situation in the previous example refers to the situation where the battery device cannot supply power to the first load or the second load normally, including but not limited to: battery pack failure, failure of individual battery cells in the battery pack, and failure of the power supply circuit connected to the battery pack.

[0139] The first power supply circuit is specifically used to enable the battery pack to provide power to the first load. Specifically, at least two battery packs can provide multiple parallel power supplies to the first load through the first power supply circuit.

[0140] The second power supply circuit is specifically used to enable the battery pack to provide power to the second load. Specifically, at least two battery packs can provide multiple parallel power supplies (two high and two low) to the second load through the second power supply circuit.

[0141] The second power supply circuit is specifically used to enable the battery pack to provide power to the second load. Specifically, at least one battery pack can provide a power supply to the second load through the second power supply circuit. The power supply provided by the battery pack can form multiple parallel power supplies with the power supply provided by the vehicle power supply circuit to power the second load.

[0142] The first load can specifically be a high-voltage load of an electrical device, such as a drive system or an air conditioning system. In some embodiments, the first load can specifically be a drive system within a vehicle, which may include at least one of a front-wheel drive system and a rear-wheel drive system. The front-wheel drive system can be used to drive the front wheels of the vehicle forward, backward, and steer, while the rear-wheel drive system can be used to drive the rear wheels of the vehicle forward, backward, and steer.

[0143] At least two battery packs in the battery device can provide a first voltage to the first load through the first power supply circuit. The first voltage can be the working voltage required by the first load, such as the driving voltage required by the drive motor. By supplying power to the high-voltage load through at least two battery packs in the battery device, redundant backup power for the high-voltage load is provided to the electrical device.

[0144] In some embodiments, the first voltage may be greater than or equal to 150V, for example, it may be 400V, 800V, etc.

[0145] The second load can specifically be a low-voltage load of an electrical device, such as a low-voltage appliance or a low-voltage controller. In some embodiments, the low-voltage load can specifically be a load such as a start-stop control system, a body control system, an intelligent driver assistance system, or other electrical equipment within the vehicle.

[0146] At least two battery packs in the battery device can provide a second voltage to a second load through a second power supply circuit. Specifically, the second voltage can be the voltage required by the second load. By supplying power to the low-voltage load through at least two battery packs in the battery device, redundant backup power is provided for the low-voltage load of the electrical device.

[0147] At least one battery pack in the battery device can provide a second voltage to a second load through a second power supply circuit. Specifically, the second voltage can be the voltage required by the second load. By coordinating with the vehicle-mounted power supply circuit outside the battery device, at least two power supplies are provided to the second load, thereby providing redundant backup power for the low-voltage load of the electrical device.

[0148] In some embodiments, the second voltage may be less than or equal to 60V, specifically, but not limited to, 48V, 12V, etc.

[0149] The battery device disclosed in this application is applicable to various electrical devices that use battery devices, and can be used to form a power system for an electrical device. Electrical devices include mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric boat toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0150] This application provides an electrical device including the aforementioned battery device. This electrical device can be an electric vehicle, such as an electric vehicle, electric ship, electric spacecraft, etc. The electric vehicle can be a pure electric vehicle, a hybrid electric vehicle, etc. According to the drive method, the vehicle can be a front-wheel drive vehicle, a rear-wheel drive vehicle, or a four-wheel drive vehicle. The vehicle body is mounted on a chassis, and the chassis integrates an electric drive system. The electric drive system includes a battery device, a motor, and a motor controller. The battery device can serve as a drive power source to power the motor. Electric vehicles mainly consist of a chassis, body, powertrain, and electrical system. The chassis includes, but is not limited to, the suspension, steering, braking, and transmission systems, and primarily functions to support the vehicle body, transmit power, and control the vehicle's driving posture. The body is the vehicle's outer shell, providing passenger space and protecting passenger safety; its design emphasizes lightweight construction and aerodynamics.

[0151] The powertrain system includes a battery pack, a drive motor, and a motor controller. The battery pack stores electrical energy, providing the vehicle with power; the drive motor converts electrical energy into mechanical energy to propel the vehicle. The motor controller coordinates the efficient operation of the battery pack and the motor, including energy management, power distribution, and system protection.

[0152] The electrical system includes various electronic devices and control systems, such as battery management systems, on-board chargers, air conditioning systems, lighting systems, and vehicle control systems, to monitor, control, and coordinate the various functions of the vehicle.

[0153] The basic architecture of an electric vehicle's power supply system mainly consists of a battery pack, a charging system, a DC / DC converter, and electrical loads. The battery pack is the core power source. The charging system includes AC and DC charging interfaces, allowing connection to an external power source to charge the battery pack. At least most of the high-voltage DC output from the battery pack is converted to three-phase AC power by the motor controller (inverter) to power the drive motor, which then drives the vehicle according to its driving needs. A smaller portion of the high-voltage DC output from the battery pack is converted to low-voltage DC power by the DC / DC converter to power the vehicle's low-voltage electrical systems, such as the onboard computer, dashboard, lights, and audio system. It also charges the vehicle's independently configured low-voltage (e.g., 12V, 24V) auxiliary battery to maintain its charge and ensure the stable operation of the vehicle's low-voltage equipment.

[0154] In addition, the battery device may also include a battery information management system to monitor the battery status in real time, such as voltage, current, and temperature, and to perform power management, charge and discharge control, and safety protection to ensure the safe and efficient operation of the battery.

[0155] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device.

[0156] Please refer to Figure 1 The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 1100 is installed inside the vehicle 1000, and the battery device 1100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 1100 can be used to power the vehicle 1000; for example, the battery device 1100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 1200 and a motor 1300. The controller 1200 is used to control the battery device 1100 to supply power to the motor 1300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0157] In some embodiments of this application, the battery device 1100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0158] like Figure 2 As shown, the battery device 1100 mentioned in the embodiments of this application may include multiple battery packs 1001, which are used to provide voltage and power. Each battery pack 1001 may include multiple individual battery cells 1002, which are connected in series, parallel, or a combination of both via a busbar. A combination of both can refer to a series-parallel connection.

[0159] In some embodiments, the battery pack 1001 is typically formed by arranging a plurality of battery cells 1002.

[0160] As an example, the battery pack 1001 can be a battery module, which can be housed in the housing 100 by fixing the battery module in the housing 100.

[0161] As an example, the battery pack 1001 can also be housed in the housing 100 by directly fixing multiple battery cells 1002 to the housing 100.

[0162] As an example, the housing 100 may include a first housing 110 and a second housing 120. The first housing 110 and the second housing 120 are fastened together to form a closed space inside the housing 100 to house the battery pack 1001. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing 110 may be a top cover or a bottom plate.

[0163] As an example, the housing 100 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 100 forms an enclosed space to accommodate the battery pack 1001.

[0164] As an example, the housing 100 may include a tray 10 and a cover 20. The tray 10 includes a base plate and a frame. The frame is connected to the base plate and the cover 20 respectively, so that the interior of the housing 100 forms a closed space to accommodate the battery pack 1001.

[0165] In some embodiments, the housing 100 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 100 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 100 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0166] In some embodiments, the battery cell 1002 can be a secondary battery, which refers to a battery cell 1002 that can be recharged to activate the active materials and continue to be used after being discharged. The battery cell 1002 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0167] In some embodiments, the battery device 1100 may be a single battery pack. The battery pack 1001 may include multiple battery cells connected in series and / or in parallel.

[0168] In some embodiments, one or more battery packs 1001 in the battery device 1100 are configured to be removable and / or replaceable.

[0169] In some embodiments, the battery pack 1001 may be replaced with the same or different battery packs 1001. Different battery packs 1001 include, but are not limited to, those with different voltage, capacity, energy density, or at least one different chemical system.

[0170] In some embodiments, multiple battery cells 1002 in a battery pack 1001 may be the same or different. Different battery cells 1002 include, but are not limited to, at least one of the following: voltage, capacity, energy density, and chemical system.

[0171] See Figure 3 and Figure 4As shown, in some embodiments, the battery device 1100 is used to supply power to the load 900. The battery device 1100 includes a housing 100, a first battery pack 300, and a second battery pack 400. The housing 100 has an output interface 700 for connecting to the power supply circuit of the load 900. The first battery pack 300 is located inside the housing 100 and includes a plurality of first battery cells 310. The plurality of first battery cells 310 are electrically connected to each other and form a first main terminal 320. The second battery pack 400 is located inside the housing 100 and includes a plurality of second battery cells 410. The plurality of second battery cells 410 are electrically connected to each other and form a second main terminal 420. The first main terminal 320 and the second main terminal 420 are electrically connected to the output interface 700. Both the first main terminal 320 and the second main terminal 420 are configured to be able to connect and disconnect from the load 900.

[0172] In some examples, the first battery pack 300 includes one or more battery packs 1001 as described above, and the second battery pack 400 includes one or more battery packs 1001 as described above. The first battery pack 300 and the second battery pack 400 include different battery packs 1001. The first battery cell 310 may refer to the battery cell 1002 in the first battery pack 300, and the second battery cell 410 may refer to the battery cell 1002 in the second battery pack 400.

[0173] The multiple first battery cells 310 can be connected in series, parallel, or a combination thereof to meet the voltage, current, and capacity requirements of the load 900. In this way, multiple smaller first battery cells 310 are combined into a first battery pack 300 with certain performance, improving the overall performance and reliability of the battery device 1100.

[0174] In some examples, the first battery cell 310 and the second battery cell 410 may be of the same type of battery cell 1002 or of different types of battery cells 1002.

[0175] As an example, the first battery pack 300 and the second battery pack 400 can also be connected to form a battery module, with some battery cells 1002 in the battery module forming the first battery pack 300 and other battery cells 1002 in the battery module forming the second battery pack 400.

[0176] The first main terminal 320 is a common connection point formed by the interconnection of multiple first battery cells 310 in the first battery pack 300. It is used to connect the first battery pack 300 to the output interface 700 to realize the transmission and distribution of electrical energy. The positive interface 1003 and the negative interface 1004 of the first battery pack 300 form the first main terminal 320. The positive interface 1003 and the second negative interface 1004 of the first battery pack 300 can be electrically connected to the output interface 700 through wires, terminals, or other components to supply power to the load 900.

[0177] In some examples, the busbar connects multiple first battery cells 310 together to form a unified output terminal, which is the first main terminal 320. As an example, the busbar can be a busbar structure, a strip-shaped structure made of a metal with good conductivity such as copper or aluminum, which can connect the electrode terminals of multiple first battery cells 310 together to form a unified output terminal. Busbars can effectively reduce resistance, reduce power loss, and facilitate installation and maintenance.

[0178] The multiple second battery cells 410 can be connected in series, parallel, or a combination thereof to meet the voltage, current, and capacity requirements of the load 900. In this way, multiple smaller second battery cells 410 are combined into a second battery pack 400 with certain performance, improving the overall performance and reliability of the battery device 1100.

[0179] The second main terminal 420 is a common connection point formed by the interconnection of multiple second battery cells 410 in the second battery pack 400. It is used to connect the second battery pack 400 to the output interface 700 to realize the transmission and distribution of electrical energy. The positive terminal 1003 and the negative terminal 1004 of the second battery pack 400 form the second main terminal 420. The positive terminal 1003 and the negative terminal 1004 of the second battery pack 400 can be electrically connected to the output interface 700 through wires, terminals, or other components to supply power to the load 900.

[0180] In some examples, the busbar connects multiple second battery cells 410 together to form a unified output terminal, which is the second main terminal 420. As an example, the busbar can be a busbar structure, a strip-shaped structure made of a metal with good conductivity such as copper or aluminum, which can connect the electrode terminals of multiple second battery cells 410 together to form a unified output terminal. Busbars effectively reduce resistance, minimize power loss, and facilitate installation and maintenance.

[0181] The power supply circuit of load 900 can refer to the power supply circuit of load 900. The output interface 700 is connected to the power supply circuit of load 900, and the battery device 1100 can supply power to load 900.

[0182] The output interface 700 can refer to the electrical connection interface provided on the housing 100. The output interface 700 is electrically connected to the first main terminal 320 and the second main terminal 420, and the output interface 700 is connected to the power supply circuit of the load 900, so that the electrical energy of the first battery pack 300 and the second battery pack 400 can be output to the load 900 to supply power to the load 900. The output interface 700 is also a connection bridge between the battery device 1100 and the load 900, and has the function of realizing electrical energy transmission.

[0183] In some examples, the output interface 700 may include one or more connectors, and the number of loads 900 may be one or more. Multiple loads 900 may be electrically connected to the battery device 1100 through a single connector, or multiple loads 900 may be electrically connected to the battery device 1100 through multiple connectors. Connectors may be socket connectors, plug connectors, terminal block connectors, etc. Loads 900 may be, but are not limited to, motors, air conditioners, compressors, batteries, etc.

[0184] Both the first main terminal 320 and the second main terminal 420 are configured to connect and disconnect from the load 900. This means that when the first main terminal 320 is connected to the load 900, the first battery pack 300 can supply power to the load 900; when the first main terminal 320 is disconnected from the load 900, the first battery pack 300 and the load 900 are in an open circuit state, and the first battery pack 300 cannot supply power to the load 900. Similarly, when the second main terminal 420 is connected to the load 900, the second battery pack 400 can supply power to the load 900; when the second main terminal 420 is disconnected from the load 900, the second battery pack 400 and the load 900 are in an open circuit state, and the second battery pack 400 cannot supply power to the load 900.

[0185] In some examples, the connection and disconnection between the first main terminal 320 and the load 900 can be achieved by a switch, and the connection and disconnection between the second main terminal 420 and the load 900 can also be achieved by a switch.

[0186] As an example, see Figure 4As shown, the positive terminal 1003 and negative terminal 1004 of the first battery pack 300 are electrically connected to the positive terminal 1003 and negative terminal 1004 of the load 900, respectively. At least one of the circuits connecting the positive terminal 1003 of the first battery pack 300 and the positive terminal 1003 of the load 900 and the circuits connecting the negative terminal 1004 of the first battery pack 300 and the negative terminal 1004 of the load 900 is provided with an on / off switch K1 to control the connection and disconnection between the first main terminal 320 and the load 900. The positive terminal 1003 and negative terminal 1004 of the second battery pack 400 are electrically connected to the positive terminal 1003 and negative terminal 1004 of the load 900, respectively. At least one of the circuits connecting the positive terminal 1003 of the second battery pack 400 and the positive terminal 1003 of the load 900 and the circuits connecting the negative terminal 1004 of the second battery pack 400 and the negative terminal 1004 of the load 900 is provided with an on / off switch K1 to control the connection and disconnection between the second main terminal 420 and the load 900.

[0187] In some embodiments, see Figure 4 As shown in a), the on / off switch K1 can be set between the output interface 700 and the first main terminal 320 and / or the second main terminal 420.

[0188] In some embodiments, see Figure 4 As shown in b), the on / off switch K1 can also be set between the output interface 700 and the load 900; it can be understood that in some embodiments, part of the on / off switch K1 is set between the output interface 700 and the first main terminal 320 and / or the second main terminal 420, and another part is set between the output interface 700 and the load 900.

[0189] In some examples, see Figure 5 As shown, the first battery pack 300 and the second battery pack 400 are connected in parallel and electrically connected to the load 900. The parallel branch of the first battery pack 300 is equipped with one or more on / off switches K1 to control the connection and disconnection between the first main terminal 320 and the load 900. The parallel branch of the second battery pack 400 is equipped with one or more on / off switches K1 to control the connection and disconnection between the second main terminal 420 and the load 900.

[0190] As an example, see Figure 6As shown in c), the first battery pack 300 and the second battery pack 400 are connected in series and electrically connected to the load 900. A switch K1 is connected between the positive terminal 1003 of the first battery pack 300 and the positive terminal 1003 of the output terminal 700. A switch K1 is also connected between the negative terminal 1004 of the first battery pack 300 and the positive terminal 1003 of the output terminal 700. A switch K1 is also connected between the positive terminal 1003 of the second battery pack 400 and the negative terminal 1004 of the output terminal 700. A switch K1 is also connected between the negative terminal 1004 of the second battery pack 400 and the negative terminal 1004 of the output terminal 700. This controls the series and parallel connection of the first battery pack 300 and the second battery pack 400, as well as the individual power supply of the first battery pack 300 and the second battery pack 400.

[0191] As an example, see Figure 6 As shown in d), the first battery pack 300 and the second battery pack 400 are connected in series and electrically connected to the load 900. A switch K1 is connected between the positive terminal 1003 of the first battery pack 300 and the positive terminal 1003 of the output terminal 700. A switch K1 is also connected between the negative terminal 1004 of the second battery pack 400 and the negative terminal 1004 of the output terminal 700. The negative terminal 1004 of the first battery pack 300 and the positive terminal 1003 of the second battery pack 400 are electrically connected to the positive terminal 1003 and the negative terminal 1004 of the output terminal 700 respectively through a single-pole double-throw switch K5, thereby controlling the series and parallel connection of the first battery pack 300 and the second battery pack 400, as well as the individual power supply of the first battery pack 300 and the second battery pack 400.

[0192] In this embodiment of the battery device 1100, during use, both the first battery pack 300 and the second battery pack 400 can supply power to the load 900 through the output interface 700. Furthermore, both the first main terminal 320 and the second main terminal 420 are configured to connect and disconnect from the load 900. When the first battery pack 300 malfunctions, the first main terminal 320 can be disconnected from the load 900, while the second main terminal 420 is connected to the load 900, switching to independent power supply from the second battery pack 400 to the load 900. Similarly, when the second battery pack 400 malfunctions, the first battery pack 300 can also independently supply power to the load 900. This ensures that if one of the first battery pack 300 or the second battery pack 400 malfunctions, the other can continue to supply power, allowing the load 900 to operate. This improves the reliability and stability of the entire battery device 1100 and solves the problem that the device cannot continue to be used when one battery pack 1001 malfunctions.

[0193] In some embodiments, the load 900 includes a first load 910, the output interface 700 includes a first output interface 710 for connecting the power supply circuit of the first load 910, the first main terminal 320 and the second main terminal 420 are electrically connected to the first output interface 710, and the first battery pack 300 and the second battery pack 400 are both able to provide a first voltage to the first load 910, the first voltage range being greater than or equal to 150V.

[0194] The first load 910 can refer to a load 900 whose supply voltage is the first voltage; the first voltage is greater than or equal to 150V, and the first voltage can be any value above 150V; for example, the first voltage can be, but is not limited to, 150V, 200V, 250V, 300V, 350V, 400V, 500V, 600V, 700V, 800V, 1000V, and 1500V.

[0195] As an example, in vehicle 1000, load 900 is divided into high-voltage load and low-voltage load. The high-voltage load may include at least one of the vehicle 1000's front-wheel drive system and rear-wheel drive system. The front-wheel drive system can be used to drive the front wheels of vehicle 1000 forward, backward, and steer, while the rear-wheel drive system can be used to drive the rear wheels of vehicle 1000 forward, backward, and steer. The low-voltage load includes the vehicle 1000's electronic control system, onboard refrigerator, onboard air conditioner, and 12V / 48V battery. The low-voltage load can be referred to as the second load 920, and the supply voltage of the second load 920 is the second voltage.

[0196] The power supply circuit of the first load 910 can refer to the power supply circuit of the first load 910. The first output interface 710 is connected to the power supply circuit of the first load 910. The battery device 1100 can supply power to the first load 910.

[0197] The first output interface 710 can refer to the interface in the output interface 700 used for electrical connection with the first load 910. The first output interface 710 is electrically connected to the first main terminal 320 and the second main terminal 420, and the first output interface 710 is connected to the power supply circuit of the first load 910, so that both the first battery pack 300 and the second battery pack 400 can output to the first load 910 to provide a first voltage.

[0198] In some examples, the first output interface 710 may include one or more connectors, and the number of first loads 910 may be one or more. Multiple first loads 910 may be electrically connected to the battery device 1100 via a single connector, or multiple first loads 910 may be electrically connected to the battery device 1100 via multiple connectors. The connectors may be socket connectors, plug connectors, terminal block connectors, etc.

[0199] Both the first battery pack 300 and the second battery pack 400 can provide a first voltage to the first load 910. It can be understood that when the first main terminal 320 is connected to the first load 910, the first battery pack 300 can provide a first voltage to the first load 910, and the first load 910 can operate; when the second main terminal 420 is connected to the second load 920, the second battery pack 400 can provide a first voltage to the second load 920, and the second load 920 can operate.

[0200] By adopting the technical solution of this embodiment, both the first battery pack 300 and the second battery pack 400 can provide the first voltage to the first load 910, forming a redundant power supply system for the first load 910. When one of the first battery pack 300 and the second battery pack 400 malfunctions, the other can provide the first voltage to the first load 910, improving the reliability and stability of the battery device 1100, enabling the first load 910 to continue to operate stably, and reducing the downtime of the electrical device caused by the malfunction of the battery device 1100.

[0201] In some embodiments, see Figure 7 As shown, the first battery pack 300 and the second battery pack 400 provide a first voltage to the first load 910 through the first power supply circuit 240, and the first battery pack 300 and the second battery pack 400 provide a second voltage to the second load 920 through the second power supply circuit 250.

[0202] In some embodiments, see Figure 8 and Figure 9 As shown, the first main terminal 320 and the second main terminal 420 are electrically connected to the first load 910 via the switch module 210, which is configured to enable at least one of the following power supply modes: Power supply mode 1: Switching from power supply state 1 to power supply state 2; Power supply mode two: Switching from power supply state one to power supply state three; Power supply mode three: switching from power supply state one to power supply state two and switching from power supply state one to power supply state three; Power supply mode four: Switching between power supply state two and power supply state three; Power supply mode five: Switching from power supply state four to power supply state five; Power supply mode six: Switching from power supply state four to power supply state six; Power supply mode seven: Switching between power supply state one and power supply state four; In the first power supply state, the first battery pack 300 and the second battery pack 400 are connected in parallel to supply power to the first load 910. Power supply state two: The first battery pack 300 supplies power to the first load 910, and the second battery pack 400 is disconnected from the first load 910; Power supply state three: The second battery pack 400 supplies power to the first load 910, and the first battery pack 300 is disconnected from the first load 910; Power supply state four: The first battery pack 300 and the second battery pack 400 are connected in series to supply power to the first load 910; Power supply state five: Disconnect the first battery pack 300 and the second battery pack 400 from the series connection, and connect the first battery pack 300 and the first load 910. Power supply state six: Disconnect the first battery pack 300 and the second battery pack 400 from the series connection, and connect the second battery pack 400 and the first load 910.

[0203] The switch module 210 can refer to a module used to control the connection and disconnection between the first main terminal 320 and the first load 910, and between the second main terminal 420 and the first load 910. By controlling the switch module 210, the connection and disconnection between the first battery pack 300 and the second battery pack 400 and the first load 910 can be realized, thereby achieving multiple power supply modes.

[0204] Power supply state 1: The first battery pack 300 and the second battery pack 400 are connected in parallel to supply power to the first load 910. When connected in parallel, the total voltage of the first battery pack 300 and the second battery pack 400 remains unchanged, but the total current of the first battery pack 300 and the second battery pack 400 increases, which can provide a larger current to the first load 910. This is suitable for scenarios that require high current output, such as when the first load 910 needs a large power at startup or when the vehicle is climbing a hill at 1000 km / h. This power supply state can also be used as the normal power supply state.

[0205] Power supply state two: The first battery pack 300 supplies power to the first load 910, and the second battery pack 400 is disconnected from the first load 910. When the second battery pack 400 malfunctions, requires maintenance, or has low power, it can switch to this state, and the first load 910 can be powered by the first battery pack 300 and continue to operate; this power supply state can also be used as normal power supply, in which case the second battery pack 400 serves as a backup power source, or the second battery pack 400 replenishes power to the first battery pack 300.

[0206] Power supply state three: The second battery pack 400 supplies power to the first load 910, and the first battery pack 300 is disconnected from the first load 910. Similar to power supply state two, when the first battery pack 300 malfunctions, the second battery pack 400 can supply power to the first load 910 independently; this power supply state can also be used as a normal power supply, in which case the first battery pack 300 acts as a backup power source, or the first battery pack 300 replenishes power to the second battery pack 400.

[0207] Power supply state four: The first battery pack 300 and the second battery pack 400 are connected in series to supply power to the first load 910. When connected in series, the total voltage of the first battery pack 300 and the second battery pack 400 will increase, enabling them to provide a higher voltage to the first load 910.

[0208] Power supply state five: Disconnect the first battery pack 300 and the second battery pack 400 from series, and connect the first battery pack 300 and the first load 910. When the second battery pack 400 malfunctions, requires maintenance, or has low power, it can be switched to this state. The first load 910 can be powered by the first battery pack 300 and can continue to operate. This power supply state can also be used as normal power supply, in which case the second battery pack 400 serves as a backup power source, or the second battery pack 400 replenishes power to the first battery pack 300.

[0209] Power supply state six: Disconnect the first battery pack 300 and the second battery pack 400 from series, and connect the second battery pack 400 and the first load 910. When the first battery pack 300 malfunctions, requires maintenance, or has low power, it can be switched to this state. The first load 910 can be powered by the first battery pack 300 and can continue to operate. This power supply state can also be used as normal power supply, in which case the first battery pack 300 acts as a backup power source, or the first battery pack 300 replenishes power for the second battery pack 400.

[0210] One power supply mode is to switch from parallel power supply of the first battery pack 300 and the second battery pack 400 to power supply of the first battery pack 300 alone. In this way, when the second battery pack 400 is abnormal, the parallel power supply can be disconnected and the power supply can be switched to the first battery pack 300. The first battery pack 300 serves as a backup battery for the second battery pack 400, forming a redundant power supply system for the first load 910.

[0211] The second power supply mode is to switch from parallel power supply of the first battery pack 300 and the second battery pack 400 to power supply of the second battery pack 400 alone. In this way, when the first battery pack 300 is abnormal, the parallel power supply can be disconnected and the power supply can be switched to the second battery pack 400. The second battery pack 400 serves as a backup battery for the first battery pack 300, forming a redundant power supply system for the first load 910.

[0212] The third power supply mode covers the switching scenarios of the first two modes. When the second battery pack 400 malfunctions, the parallel connection can be disconnected, and power can be switched to the first battery pack 300. Similarly, when the first battery pack 300 malfunctions, the parallel power supply can be disconnected, and power can be switched to the second battery pack 400. The two battery packs 1001 serve as backup batteries for each other, forming a redundant power supply system for the first load 910. Furthermore, the battery device 1100 can flexibly switch between these two power supply modes according to actual needs to meet different usage requirements.

[0213] Power supply mode four: It realizes the mutual switching between power supply state two and power supply state three, that is, it can flexibly switch between the first battery pack 300 and the second battery pack 400 supplying power independently. In this way, when one of the first battery pack 300 and the second battery pack 400 fails to work properly, the other can continue to supply power to the first load 910, forming a redundant power supply system for the first load 910.

[0214] Power supply mode 5-6: This mode switches from the series power supply state of the first battery pack 300 and the second battery pack 400 to individual power supply for the first battery pack 300 and the second battery pack 400, respectively. In this way, if either the first battery pack 300 or the second battery pack 400 malfunctions, the series power supply state can be disconnected, and the system can switch to power supply only by the normal battery pack 1001, forming a redundant power supply system for the first load 910. In addition, the power supply mode can be adjusted according to the voltage and current requirements of the first load 910.

[0215] Power supply mode seven: It realizes the switching between power supply state one and power supply state four, that is, the switching between parallel power supply of the first battery pack 300 and the second battery pack 400 and series power supply, so as to meet the different voltage and current requirements of the first load 910 in different working stages.

[0216] In some examples, the switch module 210 may adopt the structure of the on / off switch K1 described above, as well as the structure of the on / off switch K1 and the single-pole double-throw switch K5.

[0217] In some examples, combined Figure 8 As shown, the switch module 210 includes a first single-pole double-throw switch K2 and a second single-pole double-throw switch K3, which are disposed between the first battery pack 300 and the second battery pack 400. The following explanation assumes that both the first battery pack 300 and the second battery pack 400 can output a 400V voltage.

[0218] Combination Figure 8 As shown in Example a), the contact 6 of the first single-pole double-throw switch K2 and the contact 5 of the second single-pole double-throw switch K3 are connected. By controlling the connection of contacts 3 and 6 of the first single-pole double-throw switch K2 and contacts 1 and 5 of the second single-pole double-throw switch K3, the first battery pack 300 and the second battery pack 400 can be connected in series, and an 800V voltage can be provided by the first output interface 710.

[0219] Combination Figure 8As shown in Example b), in the event of an abnormality in the first battery pack 300, by controlling the disconnection between contacts 3 and 6 of the first single-pole double-throw switch K2 and the connection between contacts 1 and 2 of the second single-pole double-throw switch K3, the second battery pack 400 can provide a voltage of 400V to the first output interface 710.

[0220] Combination Figure 8 As shown in Example c), in the event of an abnormality in the second battery pack 400, by controlling the disconnection between contacts 3 and 6 of the first single-pole double-throw switch K2, and connecting contacts 3 and 4 of the first single-pole double-throw switch K2, the first battery pack 300 can provide a voltage of 400V to the first output interface 710.

[0221] Combination Figure 8 As shown in Example d), when the required voltage of the first output interface 710 is 400V, by controlling the disconnection between contacts 3 and 6 of the first single-pole double-throw switch K2, contact 3 of the first single-pole double-throw switch K2 is connected to its contact 4, and contact 1 of the second single-pole double-throw switch K3 is connected to its contact 2, the first battery pack 300 and the second battery pack 400 can be connected in parallel, and at the same time, a voltage of 400V is provided to the first output interface 710.

[0222] See in some examples Figure 9 As shown, the switch module 210 includes a third switch K11, a first switch K21, and a second switch K22. The third switch K11 is connected to the first battery pack 300 and the second battery pack 400. The switching state of the third switch K11 is controlled by the battery information management component, which can control the first battery pack 300 and the second battery pack 400 to be connected in series. The first switch K21 is connected between the positive terminal 1003 of the first battery pack 300 and the positive terminal 1003 of the first output terminal 710. The second switch K22 is connected between the negative terminal 1004 of the second battery pack 400 and the negative terminal 1004 of the first output terminal 710. The switching states of the first switch K21 and the second switch K22 are controlled by the battery information management component, which can control the first battery pack 300 and the second battery pack 400 to be connected in parallel.

[0223] Power supply state 1: Third switch K11 is open, first switch K21 is closed, second switch K22 is closed, and first battery pack 300 and second battery pack 400 are connected in parallel.

[0224] Power supply state 2: The third switch K11 is open, the first switch K21 is closed, the second switch K22 is open, the first battery pack 300 supplies power to the first load 910, and the second battery pack 400 is disconnected from the first load 910.

[0225] Power supply state 3: The third switch K11 is open, the first switch K21 is open, the second switch K22 is closed, the second battery pack 400 supplies power to the first load 910, and the first battery pack 300 is disconnected from the first load 910.

[0226] Power supply state four: the third switch K11 is closed, the first switch K21 is open, the second switch K22 is open, and the first battery pack 300 and the second battery pack 400 are connected in series to supply power to the first load 910. Power supply state 5: The third switch K11 is open, the first switch K21 is closed, and the second switch K22 is open, so that the first battery pack 300 and the second battery pack 400 are disconnected in series, and the first battery pack 300 and the first load 910 are connected.

[0227] Power supply state six: The third switch K11 is open, the first switch K21 is open, and the second switch K22 is closed, so that the first battery pack 300 and the second battery pack 400 are disconnected in series, and the second battery pack 400 and the first load 910 are connected.

[0228] Power supply mode 1: Switching from power supply state 1 to power supply state 2 can be achieved by switching the second switch K22 from closed to open.

[0229] Power supply mode two: Switching from power supply state one to power supply state three can be achieved by switching the first switch K21 from closed to open.

[0230] Power supply mode four: The switching between power supply state two and power supply state three can be achieved by the opening and closing of the first switch K21 and the second switch K22.

[0231] Power supply mode five: The switch from power supply state four to power supply state five can be achieved by switching the third switch K11 from closed to open, and the first switch K21 from open to closed.

[0232] Power supply mode six: Switching from power supply state four to power supply state six can be achieved by switching the third switch K11 from closed to open, and the second switch K22 from open to closed.

[0233] Power supply mode seven: The switching between power supply state one and power supply state four can be achieved by the opening and closing of the third switch K11, the first switch K21 and the second switch K22.

[0234] By adopting the technical solution of this embodiment, the switch module 210 can realize one or more power supply modes. It can flexibly adjust the power supply mode according to the power requirements of the first load 910 and the status of the first battery pack 300 and the second battery pack 400 (such as power level, abnormal conditions, etc.), so as to ensure that the battery device 1100 can operate stably and efficiently under various conditions, improve energy utilization efficiency, and reduce the risk that the first load 910 cannot work properly due to the abnormality of the battery pack 1001.

[0235] In some implementations, refer to Figure 9 As shown, the switch module 210 includes a first switch K21 and a second switch K22. The first switch K21 is connected to the first main terminal 320 and is used to control the first battery pack 300 to be connected to the power supply circuit of the first load 910. The second switch K22 is connected to the second main terminal 420 and is used to control the second battery pack 400 to be connected to the power supply circuit of the first load 910.

[0236] By adopting the technical solution of this embodiment, a redundant power supply system for the first load 910 can be formed by opening and closing the first switch K21 and the second switch K22.

[0237] In some implementations, refer to Figure 9 As shown, the switch module 210 includes a third switch K11, which is connected to the first pole of the first main terminal 320 and the second pole of the second main terminal 420, for controlling the on / off state of the series circuit of the first battery pack 300 and the second battery pack 400.

[0238] The first pole of the first main terminal 320 and the second pole of the second main terminal 420 have different polarities. For example, the first pole of the first main terminal 320 is the positive terminal 1003 of the first main terminal 320, and the second pole of the second main terminal 420 is the negative terminal 1004 of the second main terminal 420.

[0239] By adopting the technical solution of this embodiment, the on / off control of the series circuit of the first battery pack 300 and the second battery pack 400 is controlled by the third switch K11, so as to facilitate the independent power supply of the first battery pack 300 and the second battery pack 400 in the future.

[0240] See some examples. Figure 9 As shown, the first battery pack 300 provides a first voltage to the first output interface 710 through the first power supply circuit 240, and provides a second voltage to the second output interface 720 through the second power supply circuit 250.

[0241] In some examples, the first power supply circuit 240 may include a main positive relay K43 and a main negative relay K41. The battery information management component controls the switching states of the main positive relay K43 and the main negative relay K41, so that the first battery pack 300 and the second battery pack 400 can supply power to the first load 910 through the first power supply circuit 240.

[0242] In some examples, combined Figure 9 As shown, the negative terminal 1004 of the first battery pack 300 is connected to the negative terminal 1004 of the first output terminal 710 via the first fuse F11. The first fuse F11 and the first battery pack 300 are connected in series to detect the current flowing through the first battery pack 300. If the current flowing through the first battery pack 300 exceeds a preset current threshold, the first fuse F11 can blow to protect the safety of the battery device 1100.

[0243] In some examples, combined Figure 9 As shown, the positive terminal 1003 of the second battery pack 400 is connected to the positive terminal 1003 of the first output terminal 710 via the second fuse F12. The second fuse F12 and the second battery pack 400 are connected in series to detect the current flowing through the second battery pack 400. If the current flowing through the second battery pack 400 exceeds a preset current threshold, the second fuse F12 can blow to protect the safety of the battery device 1100.

[0244] In some examples, combined Figure 9 As shown, the battery device 1100 also includes a pre-charging circuit 531 and a DC charging circuit 532. The DC charging circuit 532 is connected between the pre-charging circuit 531 and the input interface 800. The pre-charging circuit 531 is connected in parallel with the main positive relay K43. When the input interface 800 is connected to a DC charging pile, the charging pile can charge the first battery pack 300 and the second battery pack 400 through the DC charging circuit 532 and the pre-charging circuit 531.

[0245] In some examples, the pre-charge circuit 531 includes a pre-charge switch K42 and a pre-charge resistor R41, which are connected in series and then in parallel with the main positive relay K43.

[0246] In some examples, the DC charging circuit 532 includes a positive charging relay K51 and a negative charging relay K52. The positive terminal of the input interface 800 is connected to the main positive relay K43 via the positive charging relay K51, and the negative terminal of the input interface 800 is connected to the main negative relay K41 via the negative charging relay K52.

[0247] In some examples, the battery information management component controls the switching states of the main positive relay K43 and the main negative relay K41 to control the process of the first battery pack 300 and the second battery pack 400 supplying power to the first output interface 710. The battery information management component controls the switching states of the charging positive relay K51 and the charging negative relay K52 to control the charging process of the first battery pack 300 and the second battery pack 400.

[0248] Combination Figure 9 As shown, the output voltage of the first battery pack 300 and the second battery pack 400 is 400V. In driving mode, if the first battery pack 300 and the second battery pack 400 are both normal, the third switch K11 can be turned on, the first switch K21 and the second switch K22 can be turned off, the main positive relay K43 and the main negative relay K41 can be turned on, and the charging positive relay K51 and the charging negative relay K52 can be turned off. The voltage of the first output interface 710 is 800V, so that the drive system operates with 800V as the working voltage, which meets the needs of high-voltage application scenarios within 1000V of the vehicle.

[0249] In some examples, if the first battery pack 300 malfunctions while the second battery pack 400 functions normally, the third switch K11 and the first switch K21 are disconnected, and the second switch K22 is turned on. The second battery pack 400 then supplies 400V to the first output interface 710 through the main positive relay K43 and the main negative relay K41, enabling the drive system to operate at 400V. This provides redundant backup power to the drive load 900 within the vehicle 1000, meeting the normal operation requirements of the drive system within the vehicle 1000 and improving the power supply stability of the battery device 1100.

[0250] If the second battery pack 400 malfunctions while the first battery pack 300 functions normally, the first switch K21 is turned on, and the second switch K22 and the third switch K11 are turned off. The first battery pack 300 then supplies 400V to the first output interface 710 through the main positive relay K43 and the main negative relay K41, enabling the drive system to operate at 400V. This provides redundant backup power to the drive load 900 within the vehicle 1000, meeting the normal operation requirements of the drive system within the vehicle 1000 and improving the power supply stability of the battery device 1100.

[0251] In charging mode, the battery device 1100 is compatible with 400V and 800V charging piles for charging. If the input interface 800 is connected to a 400V charging pile, the first switch K21 and the second switch K22 are turned on, the third switch K11 is turned off, the main positive relay K43 and the main negative relay K41, the positive charging relay K51 and the negative charging relay K52 are closed, and the input interface 800 charges the first battery pack 300 and the second battery pack 400 by providing a 400V charging voltage to them.

[0252] If the input interface 800 is connected to an 800V charging station, the first switch K21 and the second switch K22 are open, the third switch K11 is closed, and the main positive relay K43, the main negative relay K41, the positive charging relay K51, and the negative charging relay K52 are closed. The input interface 800 charges the first battery pack 300 and the second battery pack 400 connected in series by providing an 800V charging voltage. The input interface 800 can refer to the charging interface on the housing 100.

[0253] In some embodiments, see Figure 11 As shown, at least one of the first main terminal 320 and the second main terminal 420 is electrically connected to the first load 910 through the first voltage conversion module 220, which is used to convert the voltage of the corresponding main terminal into a first voltage.

[0254] The voltage at the first main terminal 320 is the output voltage of the first battery pack 300. The voltage at the second main terminal 420 is the output voltage of the second battery pack 400.

[0255] The first voltage conversion module 220 is used to convert the voltage at the corresponding main terminal into a first voltage. When the voltage output by the first battery pack 300 and / or the second battery pack 400 differs from the first voltage required by the first load 910, the first voltage conversion module 220 is needed to achieve voltage matching. For example, if the voltage output from the corresponding main terminal is higher than the first voltage of the first load 910, the first voltage conversion module 220 may perform a step-down operation; conversely, if the voltage output from the corresponding main terminal is lower than the first voltage of the first load 910, it may perform a step-up operation. The first voltage conversion module 220 can be, but is not limited to, a DC-DC converter, a linear regulator, a transformer-type voltage converter, etc.

[0256] In some examples, the first main terminal 320 is electrically connected to the first load 910 via a first voltage conversion module 220, which converts the voltage from the first main terminal 320 into a first voltage. The voltage from the first main terminal 320 is not directly supplied to the first load 910, but is converted by the intermediate first voltage conversion module 220 before being supplied to the first load 910. This ensures that regardless of the voltage at the first main terminal 320, the first voltage conversion module 220 can convert it to the first voltage required by the first load 910, enabling the first load 910 to operate normally and improving the compatibility and versatility of the entire battery device 1100. Simultaneously, by converting the voltage, damage to the first load 910 from excessively high or low voltages is reduced, extending the lifespan of the first load 910. Thus, regardless of whether the first battery pack 300 outputs multiple voltages, the first battery pack 300 can serve as a backup power source for the second battery pack 400, thereby forming a redundant power supply system for the first load 910.

[0257] In some examples, the second main terminal 420 is electrically connected to the first load 910 via a first voltage conversion module 220, which converts the voltage from the second main terminal 420 into a first voltage. The voltage from the second main terminal 420 is not directly supplied to the first load 910, but is converted by the intermediate first voltage conversion module 220 before being supplied to the first load 910. This ensures that regardless of the voltage at the second main terminal 420, the first voltage conversion module 220 can convert it to the first voltage required by the first load 910, enabling the first load 910 to operate normally and improving the compatibility and versatility of the entire battery device 1100. Simultaneously, by converting the voltage, damage to the first load 910 from excessively high or low voltages is reduced, extending the lifespan of the first load 910 and increasing the flexibility and adaptability of the battery device 1100. Thus, regardless of the multiple voltages output by the second battery pack 400, the second battery pack 400 can serve as a backup power source for the first battery pack 300, thereby forming a redundant power supply system for the first load 910.

[0258] In some examples, both the first main terminal 320 and the second main terminal 420 are electrically connected to the first load 910 through the first voltage conversion module 220. The first voltage conversion module 220 is used to convert the voltage of the first main terminal 320 and the second main terminal 420 into a first voltage. When the voltage of the first main terminal 320 and the second main terminal 420 is not the first voltage, the first battery pack 300 and the second battery pack 400 can both provide the first voltage to the first load 910 through the first voltage conversion module 220, so that the first load 910 can work normally.

[0259] By adopting the technical solution of this embodiment, when the voltage of the first main terminal 320 and / or the second main terminal 420 is not the first voltage, it can be converted into the first voltage required by the first load 910 by the first voltage conversion module 220, thus enabling the first load 910 to operate normally and improving the compatibility and versatility of the entire battery device 1100. Simultaneously, by converting the voltage, damage to the first load 910 from excessively high or low voltages is reduced, extending the service life of the first load 910 and increasing the flexibility and adaptability of the battery device 1100. Thus, regardless of the output voltage of the first battery pack 300 and the second battery pack 400, the second battery pack 400 and the first battery pack 300 can serve as backup power sources for each other, thereby forming a redundant power supply system for the first load 910.

[0260] In some embodiments, the first voltage conversion module 220 is a unidirectional voltage conversion module.

[0261] A unidirectional voltage conversion module can refer to a module that can only perform voltage conversion in one direction.

[0262] In some examples, the unidirectional voltage conversion module can boost the input voltage to a first voltage, or the unidirectional voltage conversion module can step down the input voltage to a first voltage.

[0263] As an example, the voltage output by the first battery pack 300 is lower than the first voltage. The voltage output by the first battery pack 300 can be boosted to the first voltage by a unidirectional voltage conversion module; the same applies to the second battery pack 400.

[0264] As an example, the voltage output by the first battery pack 300 is higher than the first voltage, and the voltage output by the first battery pack 300 can be stepped down to the first voltage through a unidirectional voltage conversion module; the same applies to the second battery pack 400.

[0265] By adopting the technical solution of this embodiment, the unidirectional voltage conversion module can only perform unidirectional conversion, which can reduce the risk of reverse voltage flow and reduce damage to the first battery pack 300, the second battery pack 400, and the first load 910. For example, when the first battery pack 300 supplies power to the first load 910, the unidirectional voltage conversion module can only ensure that electrical energy flows stably from the first battery pack 300 to the first load 910, and will not allow electrical energy to flow back to the first battery pack 300, thus affecting the performance and lifespan of the first battery pack 300.

[0266] In some embodiments, see Figure 11 As shown, the first main terminal 320 is used to connect to the first load 910 and provide a first voltage to the first load 910 through the first battery pack 300; the second main terminal 420 provides a first voltage to the first load 910 through the first voltage conversion module 220.

[0267] By adopting the technical solution of this embodiment, the first battery pack 300 can directly supply power to the first load 910 without going through the first voltage conversion module 220, and the second battery pack 400 can supply power to the first load 910 after conversion by the first voltage conversion module 220. In use, the first battery pack 300 can be used as the main power source, and the second battery pack 400 can be used as the backup power source. In the event of a problem with the main power source, the backup power source can be temporarily used to supply power to the first load 910, so that the first load 910 can continue to operate.

[0268] In some embodiments, the first voltage conversion module 220 is a bidirectional voltage conversion module.

[0269] The bidirectional voltage conversion module can convert the voltage output from the first battery pack 300 and / or the second battery pack 400 into the first voltage required by the first load 910. For example, when the output voltage of the first battery pack 300 and / or the second battery pack 400 does not match the operating voltage of the first load 910, the bidirectional voltage conversion module can perform a step-down or step-up operation to make the output voltage meet the requirements of the first load 910, so that the first load 910 can operate stably.

[0270] For example, see Figure 11 As shown, the voltage output by the first battery pack 300 is equal to the first voltage, and the voltage output by the second battery pack 400 is lower than the first voltage. The first battery pack 300 can directly provide the first voltage to the first load 910. The voltage output by the second battery pack 400 is boosted to the first voltage by the bidirectional voltage conversion module before being provided to the first load 910, thus forming a redundant power supply system for the first load 910.

[0271] By adopting the technical solution of this embodiment, the bidirectional voltage conversion module enables the battery device 1100 to achieve bidirectional flow of electrical energy. On the one hand, the first battery pack 300 and / or the second battery pack 400 can supply power to the first load 910; on the other hand, the first load 910 can also charge the first battery pack 300 and / or the second battery pack 400 through the bidirectional voltage conversion module, thereby improving the flexibility and functionality of the battery device 1100.

[0272] In some embodiments, see Figure 11 As shown, the load 900 includes a second load 920, and the output interface 700 includes a second output interface 720 for connecting to the power supply circuit of the second load 920. At least one of the first main terminal 320 and the second main terminal 420 is electrically connected to the second output interface 720. At least one of the first battery pack 300 and the second battery pack 400 is capable of providing a second voltage to the second load 920, and the second voltage is less than or equal to 60V.

[0273] The second load 920 can refer to a load 900 whose supply voltage is the second voltage; the second voltage is less than or equal to 60V, and the second voltage can be any value above or below 60V; for example, the second voltage can be, but is not limited to, 1V, 5V, 10V, 12V, 24V, 28V, 30V, 45V, 48V, 50V, 55V, and 60V.

[0274] The power supply circuit of the second load 920 can refer to the power supply circuit of the second load 920. The second output interface 720 is connected to the power supply circuit of the second load 920, and the battery device 1100 can supply power to the second load 920.

[0275] The second output interface 720 may refer to the interface in the output interface 700 used for electrical connection with the second load 920. The second output interface 720 is electrically connected to at least one of the first main terminal 320 and the second main terminal 420, and the second output interface 720 is connected to the power supply circuit of the second load 920, so that at least one of the first battery pack 300 and the second battery pack 400 can provide a second voltage to the second load 920.

[0276] In some examples, the first main terminal 320 is electrically connected to the second output interface 720, enabling the first battery pack 300 to provide a second voltage to the second load 920.

[0277] In some examples, the second main terminal 420 is electrically connected to the second output interface 720, enabling the second battery pack 400 to provide a second voltage to the second load 920.

[0278] In some examples, both the first main terminal 320 and the second main terminal 420 are electrically connected to the second output interface 720, so that both the first battery pack 300 and the second battery pack 400 can provide a second voltage to the second load 920.

[0279] In some examples, the second output interface 720 may include one or more connectors, and the number of second loads 920 may be one or more. Multiple second loads 920 may be electrically connected to the battery device 1100 via a single connector, or multiple second loads 920 may be electrically connected to the battery device 1100 via multiple connectors. The connectors may be socket connectors, plug connectors, terminal block connectors, etc.

[0280] In some cases, electrical devices (e.g., vehicle 1000) typically have a built-in circuit that uses battery device 1100 to provide a second voltage to the second load 920. However, this embodiment adds an additional circuit that uses first battery pack 300 and / or second battery pack 400 to provide a second voltage to the second load 920, forming two power supply circuits for the second load 920 and creating a redundant power supply system for the second load 920. In this way, if the original power supply circuit of the second load 920 is damaged, the first battery pack 300 and / or second battery pack 400 can supply power to the load 920, allowing the second load 920 to continue to operate stably.

[0281] In some embodiments, at least one of the first main terminal 320 and the second main terminal 420 is electrically connected to the second load 920 through the second voltage conversion module 230, which is used to convert the voltage of the corresponding main terminal into a second voltage.

[0282] The second voltage conversion module 230 is used to convert the voltage at the corresponding main terminal into a second voltage. When the voltage output by the first battery pack 300 and / or the second battery pack 400 differs from the second voltage required by the second load 920, the second voltage conversion module 230 is needed to achieve voltage matching. For example, if the voltage output from the corresponding main terminal is higher than the second voltage of the second load 920, the second voltage conversion module 230 may perform a step-down operation; conversely, if the voltage output from the corresponding main terminal is lower than the second voltage of the second load 920, it may perform a step-up operation. The second voltage conversion module 230 can be, but is not limited to, a DC-DC converter, a linear regulator, a transformer-type voltage converter, etc.

[0283] In some examples, the first main terminal 320 is electrically connected to the second load 920 via a second voltage conversion module 230, which converts the voltage of the first main terminal 320 into a second voltage. The second load 920 is not directly connected to the first main terminal 320, but is connected through the second voltage conversion module 230. When the voltage of the first main terminal 320 does not match the second voltage, the voltage output by the first battery pack 300 can be converted by the second voltage conversion module 230 to match the operating voltage requirements of the second load 920, enabling the first battery pack 300 to supply power to the second load 920.

[0284] In some examples, the second main terminal 420 is electrically connected to the second load 920 via a second voltage conversion module 230, which converts the voltage at the second main terminal 420 into a second voltage. The second load 920 is not directly connected to the second main terminal 420, but rather connected via the second voltage conversion module 230. When the voltage at the second main terminal 420 does not match the second voltage, the voltage output from the second battery pack 400 can be converted by the second voltage conversion module 230 to match the operating voltage requirements of the second load 920, enabling the second battery pack 400 to supply power to the second load 920.

[0285] In some examples, the first main terminal 320 and the second main terminal 420 are electrically connected to the second load 920 through the second voltage conversion module 230. The second voltage conversion module 230 is used to convert the voltages of the first main terminal 320 and the second main terminal 420 into a second voltage, so that both the first battery pack 300 and the second battery pack 400 can supply power to the second load 920.

[0286] By adopting the technical solution of this embodiment, the first battery pack 300 and / or the second battery pack 400 can provide a second voltage to the second load 920, so that the second load 920 can work stably under its appropriate voltage.

[0287] In some embodiments, the second voltage conversion module 230 is a unidirectional voltage conversion module.

[0288] In some examples, a unidirectional voltage conversion module can boost the input voltage to a second voltage, or a unidirectional voltage conversion module can step down the input voltage to a second voltage.

[0289] As an example, the voltage output by the first battery pack 300 is lower than the second voltage. The voltage output by the first battery pack 300 can be boosted to the second voltage through a unidirectional voltage conversion module; the same applies to the second battery pack 400.

[0290] As an example, the voltage output by the first battery pack 300 is higher than the second voltage. The voltage output by the first battery pack 300 can be stepped down to the second voltage through a unidirectional voltage conversion module; the same applies to the second battery pack 400.

[0291] By adopting the technical solution of this embodiment, the unidirectional voltage conversion module can only perform unidirectional conversion, which can reduce the risk of reverse voltage flow and reduce damage to the first battery pack 300, the second battery pack 400, and the second load 920. For example, when the first battery pack 300 supplies power to the second load 920, the unidirectional conversion module can only ensure that electrical energy flows stably from the first battery pack 300 to the second load 920, and will not allow electrical energy to flow back to the first battery pack 300, thus affecting the performance and lifespan of the first battery pack 300.

[0292] In some embodiments, the second voltage conversion module 230 is a bidirectional voltage conversion module.

[0293] The bidirectional voltage conversion module can convert the voltage output from the first battery pack 300 and / or the second battery pack 400 into a second voltage required by the second load 920. For example, when the output voltage of the first battery pack 300 and / or the second battery pack 400 does not match the operating voltage of the second load 920, the bidirectional voltage conversion module can perform a step-down or step-up operation to make the output voltage meet the requirements of the second load 920, thus enabling the second load 920 to operate stably. Simultaneously, the bidirectional voltage conversion module can also convert the voltage output from the second load 920 into a charging voltage suitable for the first battery pack 300 and / or the second battery pack 400, thereby charging the first battery pack 300 and / or the second battery pack 400.

[0294] For example, the second load 920 is a 12V / 48V battery. The voltage output by the first battery pack 300 and the voltage output by the second battery pack 400 are higher than the second voltage. The voltage output by the first battery pack 300 and the voltage output by the second battery pack 400 are stepped down to the second voltage by a bidirectional voltage conversion module before being supplied to the second load 920, forming a redundant power supply system for the second load 920. At the same time, the voltage output by the 12V / 48V battery is stepped up to the charging voltage of the first battery pack 300 and the second battery pack 400 by the bidirectional voltage conversion module, thereby charging the first battery pack 300 and the second battery pack 400. In addition, in the vehicle 1000, the bidirectional voltage conversion module can use the battery voltage to charge the capacitors in the vehicle 1000, thereby saving the pre-charge circuit (pre-charge relay + pre-charge resistor + pre-charge return line harness).

[0295] By adopting the technical solution of this embodiment, the bidirectional voltage conversion module enables the battery device 1100 to achieve bidirectional flow of electrical energy. On the one hand, the first battery pack 300 and / or the second battery pack 400 can supply power to the second load 920; on the other hand, the second load 920 can also charge the first battery pack 300 and / or the second battery pack 400 through the bidirectional voltage conversion module, thereby improving the flexibility and functionality of the battery device 1100.

[0296] In some embodiments, see Figure 9 As shown, the housing 100 also has an input interface 800 for connecting to the power grid charging circuit; the first main terminal 320 and the second main terminal 420 are electrically connected to the charging circuit via a switch module 210, which is configured to enable at least one of the following charging modes: Charging Mode 1: Switches between Charging State 1 and Charging State 2; or Charging Mode 2: Switches between Charging State 1 and Charging State 3; in, Charging state one: The first battery pack 300 and the second battery pack 400 are connected in series to the charging circuit. Charging state two: Disconnect the first battery pack 300 and the second battery pack 400 from the series connection, and connect the second battery pack 400 or the first battery pack 300 to the charging circuit. Charging state three: Disconnect the first battery pack 300 and the second battery pack 400 from the series connection, connect the first battery pack 300 and the second battery pack 400 in parallel connection, and connect them to the charging circuit.

[0297] The input interface 800 is used for connecting to the power grid charging circuit. The battery device 1100 can be connected to the power grid through the input interface 800 to obtain electrical energy to charge the battery pack 1001.

[0298] The first main terminal 320 and the second main terminal 420 are electrically connected to the charging circuit via the switch module 210. The switch module 210 can control the on / off connection between the first battery pack 300, the second battery pack 400 and the charging circuit, thereby controlling the connection mode of the first battery pack 300 and the second battery pack 400 to the charging circuit, thus meeting different charging needs and improving charging flexibility and efficiency.

[0299] Charging Mode 1: Can switch between charging state 1 and charging state 2.

[0300] Charging State 1: The first battery pack 300 and the second battery pack 400 are connected in series in the charging circuit. During series charging, the total voltage of the first battery pack 300 and the second battery pack 400 is equal to the sum of their voltages, and the charging current is the same. This method is suitable for situations requiring higher charging voltage, which can effectively improve the charging speed. At the same time, it allows the first battery pack 300 and the second battery pack 400 to receive the same amount of charging power, which is beneficial for balancing the charging state of the first battery pack 300 and the second battery pack 400.

[0301] Charging State Two: Disconnect the series connection between the first battery pack 300 and the second battery pack 400, and then connect either the second battery pack 400 or the first battery pack 300 to the charging circuit. In this state, only one of the second battery pack 400 and the first battery pack 300 is charged. This is suitable for situations where a battery pack 1001 has low power and needs to be replenished separately, or when a single battery pack 1001 needs to be charged for maintenance. This reduces some problems that may arise from charging the first battery pack 300 and the second battery pack 400 simultaneously, such as uneven charging.

[0302] Charging Mode 2: Can switch between charging state 1 and charging state 3.

[0303] Charging State 3: Disconnect the series connection between the first battery pack 300 and the second battery pack 400, and connect them in parallel to the charging circuit. During parallel charging, the voltages of the first battery pack 300 and the second battery pack 400 are the same, and the charging current is automatically distributed according to the internal resistance and other characteristics of the first battery pack 300 and the second battery pack 400. This method is suitable for situations where the capacity of the first battery pack 300 and the second battery pack 400 is low, and it is desirable to charge both the first battery pack 300 and the second battery pack 400 simultaneously with a lower charging voltage. This can protect the battery pack 1001 to a certain extent and extend the life of the battery device 1100.

[0304] In some examples, see Figure 9 As shown, charging state one: K11 is closed, K21 is open, K22 is open, and the first battery pack 300 and the second battery pack 400 are connected in series to the charging circuit. Charging state two: K11 is open, K21 is closed, K22 is open, the first battery pack 300 and the second battery pack 400 are disconnected in series, and the first battery pack 300 is connected to the charging circuit; or, K11 is open, K21 is open, K22 is closed, the first battery pack 300 and the second battery pack 400 are disconnected in series, and the second battery pack 400 is connected to the charging circuit.

[0305] Charging state 3: K11 is open, K21 is closed, K22 is closed, the first battery pack 300 and the second battery pack 400 are disconnected from each other in series, and the first battery pack 300 and the second battery pack 400 are connected in parallel and connected to the charging circuit.

[0306] By adopting the technical solution of this embodiment, the switch module 210 can flexibly switch between two charging modes and three charging states, enabling the battery device 1100 to select the most suitable charging method according to factors such as the actual power status of the battery pack 1001, battery characteristics, and charging requirements, thereby improving charging efficiency, extending the service life of the battery pack 1001, and enhancing the adaptability of the battery device 1100 in different application scenarios.

[0307] In some embodiments, see Figure 11 As shown, the first battery pack 300 is connected to the first load 910 to output a first voltage to the first load 910, and the second battery pack 400 is connected to the second load 920 to output a second voltage to the second load 920; the first battery pack 300 is connected to the second voltage conversion module 230 to output a second voltage to the second load 920 through the second voltage conversion module 230; the second battery pack 400 is connected to the first voltage conversion module 220 to output a first voltage to the first load 910 through the first voltage conversion module 220.

[0308] In this embodiment, the first battery pack 300 can independently output a first voltage to the first load 910 via the first power supply circuit 240, and the second battery pack 400 can independently output a second voltage to the second load 920 via the second power supply circuit 250. The first side of the second voltage conversion module 230 is connected to the first battery pack 300, and the second side of the second voltage conversion module 230 is connected to the second battery pack 400 and / or the second load 920. The second voltage conversion module 230 can convert the first voltage provided by the first battery pack 300 into a second voltage and output it from its second side to the second battery pack 400 or the second load 920. The first side of the first voltage conversion module 220 is connected to the second battery pack 400 and / or the second load 920, and the second side of the first voltage conversion module 220 is connected to the first battery pack 300 and / or the first load 910. The first voltage conversion module 220 can convert the second voltage provided by the second battery pack 400 into a first voltage and output it to the first battery pack 300 or the first load 910 from its second side. In this way, if the first battery pack 300 malfunctions, the second battery pack 400 can provide the first voltage to the first load 910 through the first voltage conversion module 220. If the second battery pack 400 malfunctions, the first battery pack 300 can provide the second voltage to the second load 920 through the second voltage conversion module 230. This improves the power supply stability of the first load 910 and the second load 920, reduces the safety hazards caused by the power failure of the first load 910 or the second load 920, and is beneficial to the stability of the internal electronic control system and drive system of the vehicle 1000.

[0309] In some embodiments, combined with Figure 12 As shown, the second voltage conversion module 230 includes a first voltage conversion device 231 and a second voltage conversion device 232; a first battery pack 300 and a second battery pack 400 are connected to a first load 910 to output a first voltage to the first load 910; the first battery pack 300 is connected to the first voltage conversion device 231 to output a second voltage to the second load 920; the second battery pack 400 is connected to the second voltage conversion device 232 to output a second voltage to the second load 920.

[0310] In this embodiment, the first battery pack 300 and the second battery pack 400 can independently output a first voltage and independently provide a first voltage to the first load 910. The second power supply circuit 250 includes a first voltage converter 231 and a second voltage converter 232. Both the first voltage converter 231 and the second voltage converter 232 can convert the input first voltage into a second voltage. Specifically, the first voltage converter 231 converts the first voltage provided by the first battery pack 300 into a second voltage and outputs it to the second load 920. The second voltage converter 232 is used to convert the first voltage provided by the second battery pack 400 into a second voltage and output it to the second load 920. In the event of an abnormality in either the first battery pack 300 or the second battery pack 400, another normal battery pack 1001 can provide a first voltage to the first load 910 through the first power supply circuit 240, which can improve the power supply stability of the first load 910 and reduce the safety hazards caused by the power failure of the first load 910. On the other hand, the first battery pack 300 and the second battery pack 400 can respectively provide a second voltage to the second load 920 through the first voltage conversion device 231 and the second voltage conversion device 232. In the event of an abnormality in one of the battery packs 1001, the other normal battery pack 1001 can provide power to the second load 920 through the corresponding voltage conversion device, which can stabilize the power supply to the second load 920 and reduce the safety hazards caused by the power failure of the second load 920. Thus, it is determined that both the first load 910 and the second load 920 can have at least two power supply circuits to supply power to them, and at least one power supply circuit includes a voltage conversion circuit, which can provide redundant power supply to the first load 910 and the second load 920 at the same time, which is beneficial to the stability of the internal electronic control system and drive system of the vehicle 1000.

[0311] In some embodiments, combined with Figure 9 As shown, the load 900 includes a first load 910 and a second load 920. A first main terminal 320 and a second main terminal 420 are used to connect to the first load 910 to output a first voltage to the first load 910. The first main terminal 320 and the second main terminal 420 are connected to a second voltage conversion module 230 to output a second voltage to the second load 920 through the second voltage conversion module 230. The first voltage is greater than the second voltage.

[0312] By adopting the technical solution of this embodiment, both the first battery pack 300 and the second battery pack 400 can provide a first voltage to the first load 910, forming a redundant power supply system for the first load 910. At the same time, the first battery pack 300 and the second battery pack 400 can also provide two circuits to the second load 920 through the second voltage conversion module 230, forming a redundant power supply system for the second load 920.

[0313] In some embodiments, combined with Figure 9 As shown, the second power supply circuit 250 includes a second voltage conversion module 230. The first terminal of the main positive relay K43 and the first terminal of the main negative relay K41 are connected to the first side of the second voltage conversion module 230. The second terminal of the main positive relay K43 and the second terminal of the main negative relay K41 are connected to the first output interface 710. The battery information management component controls the second voltage conversion module 230 to convert the voltage of the first terminal of the main positive relay K43 and the first terminal of the main negative relay K41 into a second voltage and output it to the second output interface 720.

[0314] In the embodiments of this application, combined with Figure 10 As shown, the first battery pack 300 and the second battery pack 400 are arranged side by side inside the housing 100. The switch module 210 is connected between the first battery pack 300 and the second battery pack 400 and the first load 910. The second voltage conversion module 230 is connected between the switch module 210 and the second load 920.

[0315] In some embodiments, combined with Figure 11 As shown, load 900 includes a first load 910 and a second load 920. A first main terminal 320 is used to connect to the first load 910 to output a first voltage to the first load 910. The first main terminal 320 is connected to a second voltage conversion module 230 to output a second voltage to the second load 920. A second main terminal 420 is connected to a first voltage conversion module 220 to output a first voltage to the first load 910. The second main terminal 420 is used to connect to the second load 920 to output a second voltage to the second load 920. The first voltage is greater than the second voltage.

[0316] The first battery pack 300 has a high voltage and a low voltage. The first battery pack 300 directly provides the first voltage to the first load 910. The first battery pack 300 can also provide the second voltage to the second load 920 through the second voltage conversion module 230. The second battery pack 400 directly provides the second voltage to the second load 920. The second battery pack 400 can also provide the first voltage to the first load 910 through the first voltage conversion module 220.

[0317] By adopting the technical solution of this embodiment, both the first battery pack 300 and the second battery pack 400 can provide a first voltage to the first load 910, forming a redundant power supply system for the first load 910. Simultaneously, the first battery pack 300 and the second battery pack 400 can also provide two circuits to the second load 920 through the second voltage conversion module 230, forming a redundant power supply system for the second load 920. For example, the battery pack 1001 with the higher voltage can be used as a primary power source, while the battery pack 1001 with the lower voltage can be used as a backup power source.

[0318] In some embodiments, see Figure 13 As shown, the switch module 210 includes a third switch K11, a switch K23, and a switch K24. The battery information management component can control the third switch K11 to turn on, so that the first battery pack 300 and the second battery pack 400 are connected in series. The output voltage of the second battery pack 400 can be the same as or different from the output voltage of the first battery pack 300.

[0319] In some embodiments, see Figure 13 As shown, the first voltage conversion module 220 and the second voltage conversion module 230 can also be integrated into a single voltage conversion module 270, which is a bidirectional voltage conversion module. The first battery pack 300 has a high voltage, and the second battery pack 400 has a low voltage. The first battery pack 300 can directly supply power to the first load 910. The first battery pack 300 can also provide a second voltage to the second load 920 after being stepped down by the voltage conversion module 270. The second battery pack 400 can provide a first voltage to the first load 910 after being stepped up by the voltage conversion module 270. The second battery pack 400 can also provide a second voltage to the second load 920 after being stepped down by the voltage conversion module 270. The second battery pack 400 can also charge the first battery pack 300 after being stepped up by the voltage conversion module 270, and / or the first battery pack 300 can also charge the second battery pack 400 through the voltage conversion module 270. Of course, the first voltage conversion module 220 and the second voltage conversion module 230 can also be two separate modules.

[0320] In some embodiments, the second battery pack 400 directly provides a second voltage to the second load 920.

[0321] In some embodiments, see Figure 13 As shown, by connecting the first battery pack 300 and the second battery pack 400 in series, and controlling switch K23 to be open, switch K24 to be open, and third switch K11 to be open, the series-connected first battery pack 300 and second battery pack 400 can provide voltage to the first output interface 710 and output it to the first load 910. Simultaneously, the second battery pack 400 provides a second voltage to the second output interface 720 via voltage conversion module 270. The battery information management component also controls the voltage conversion module 270 to convert the voltage provided by the series-connected first battery pack 300 and second battery pack 400 into the second voltage and output it to the second output interface 720. If the voltage output by the second battery pack 400 is the second voltage, connecting the second battery pack 400 to the voltage conversion module 270 allows the second output interface 720 and the voltage conversion module 270 to share a common ground, reducing the safety hazards caused by the second battery pack 400 and the second output interface 720 not sharing a common ground, and improving the electrical safety of the vehicle 1000.

[0322] In some embodiments, the output voltage of the first battery pack 300 is a first voltage, and the output voltage of the second battery pack 400 is a second voltage, wherein the second voltage is less than the first voltage. Figure 13 As shown, the voltage conversion module 270 can be a bidirectional voltage conversion module. The battery information management component can realize the power conversion between the first battery pack 300 and the second battery pack 400 by controlling the switching states of the third switch K11, switch K23 and switch K24. Alternatively, the second battery pack 400 can provide the first voltage to the first output interface 710 via the voltage conversion module 270.

[0323] In this embodiment, the battery information management component controls the third switch K11 and switch K24 to open and controls switch K23 to open. In the event of an abnormality in the first battery pack 300, switch K23 can be opened. The battery information management component then controls the voltage conversion module 270 to convert the second voltage provided by the second battery pack 400 into a first voltage, which is then output to the first output interface 710 via the first power supply circuit 240. When the charge of the first battery pack 300 is below a threshold charge level, the battery information management component can control switch K23 to open and the third switches K11 and K24 to close. The voltage conversion module 270 then converts the second voltage provided by the second battery pack 400 into a first voltage to charge the first battery pack 300, thereby replenishing its power and improving the battery device 1100's range.

[0324] In some embodiments, see Figure 9 As shown, the load 900 includes a first load 910 and a second load 920. The first main terminal 320 and the second main terminal 420 are used to connect to the first load 910 to output a first voltage to the first load 910. The second main terminal 420 is connected to the second voltage conversion module 230 to output a second voltage to the second load 920 through the second voltage conversion module 230.

[0325] By adopting the technical solution of this embodiment, both the first battery pack 300 and the second battery pack 400 can provide a first voltage to the first load 910, forming a redundant power supply system for the first load 910. At the same time, the second battery pack 400 can also provide a second voltage to the second load 920 through the second voltage conversion module 230, forming a redundant power supply system for the second load 920.

[0326] In some embodiments, see Figure 11As shown, load 900 includes a first load 910 and a second load 920. A first main terminal 320 is used to connect to the first load 910 to output a first voltage to the first load 910. A second main terminal 420 is used to connect to the second load 920 to output a second voltage to the second load 920. The second main terminal 420 is connected to a first voltage conversion module 220 to output a first voltage to the first load 910 through the first voltage conversion module 220. The first voltage is greater than the second voltage.

[0327] For example, the voltage output by the first battery pack 300 is greater than the voltage output by the second battery pack 400. The first battery pack 300 directly provides the first voltage to the first load 910, and the second battery pack 400 can also provide power to the first load 910 after being boosted by the first voltage conversion module 220, forming a redundant power supply system for the first load 910; the second battery pack 400 directly provides the second voltage to the second load 920, forming a redundant power supply system for the second load 920.

[0328] In some embodiments, combined with Figure 14 As shown, the first voltage conversion module 220 and the second voltage conversion module 230 are integrated into a voltage conversion module 270. The voltage conversion module 270 can be a bidirectional voltage conversion module. The voltage of the first battery pack 300 is high, and the voltage of the second battery pack 400 is low. The first battery pack 300 provides a first voltage to the first output interface 710 via the first power supply circuit 240. The second battery pack 400 provides a second voltage to the second output interface 720 via the voltage conversion module 270 and also provides a first voltage to the first output interface 710 via the voltage conversion module 270. The first battery pack 300 provides a second voltage to the second output interface 720 via the voltage conversion module 270, thus forming dual redundancy between the first load 910 and the second load 920. The second battery pack 400 can also charge the first battery pack 300 after being boosted by the voltage conversion module 270, and / or the first battery pack 300 can also charge the second battery pack 400 via the voltage conversion module 270.

[0329] In some embodiments, the second battery pack 400 may also directly provide a second voltage to the second output interface 720.

[0330] In some embodiments, see Figure 14As shown, the switch module 210 includes a first switch K25 and a second switch K26. The first switch K25 is electrically connected between the positive terminal interface 1003 of the first battery pack 300 and the positive terminal interface 1003 of the first output interface 710. The second switch K26 is electrically connected between the voltage conversion module 270 and the positive terminal interface 1003 of the first output interface 710. The battery information management component can control the first switch K25 and the second switch K26 to turn on, so that the first battery pack 300 and the second battery pack 400 respectively supply power to the first output interface 710.

[0331] In some embodiments, if the first battery pack 300 malfunctions, the first switch K25 is disconnected and the second switch K26 is turned on. The second battery pack 400 can output a first voltage to the first load 910 via the voltage conversion module 270, and can also provide a second voltage to the second load 920 via the voltage conversion module 270. In this way, the smaller capacity second battery pack 400 can be used to power the first load 910 to maintain the continued operation of the electrical device.

[0332] In some embodiments, see Figure 13 and Figure 14 As shown, the first main terminal 320 and the second main terminal 420 are connected through the first voltage conversion module 220, and the second battery pack 400 is also used to supply power to the first battery pack 300 through the first voltage conversion module 220.

[0333] The first main terminal 320 and the second main terminal 420 are connected via the first voltage conversion module 220. The second battery pack 400 also supplies power to the first battery pack 300 via the first voltage conversion module 220, allowing the second battery pack 400 to replenish the energy of the first battery pack 300, enabling the first battery pack 300 to operate for a longer period of time. This helps extend the overall lifespan of the battery device 1100, thereby improving its driving range. Additionally, the second battery pack 400 can output a first voltage after conversion via the first voltage conversion module 220, for example, to power a motor, further enhancing the driving range of the battery device 1100.

[0334] In some embodiments, see Figure 13 and Figure 14 As shown, the first battery pack 300 is also used to charge the second battery pack 400 through the first voltage conversion module 220.

[0335] The voltage output by the first battery pack 300 can also be converted by the first voltage conversion module 220 to charge the second battery pack 400, thus enabling mutual charging between the first battery pack 300 and the second battery pack 400.

[0336] In some embodiments, see Figure 13 and Figure 14As shown, the battery device 1100 also includes a first main terminal 320 and a second main terminal 420 connected through a switch module 210, which is used to control the first battery pack 300 and the second battery pack 400 to be connected in series.

[0337] The first battery pack 300 and the second battery pack 400 connected in series can provide a higher voltage to the load 900.

[0338] In some embodiments, see Figure 13 and Figure 14 As shown, the first voltage conversion module 220 includes a first voltage conversion component; the first voltage conversion component is connected to the first main terminal 320 and the second main terminal 420 respectively; the first battery pack 300 charges the second battery pack 400 through the first voltage conversion component, or the second battery pack 400 charges the first battery pack 300 through the first voltage conversion component.

[0339] The first voltage converter is a voltage conversion component that can convert the voltage output by the first battery pack 300 into the charging voltage of the second battery pack 400, thereby enabling the first battery pack 300 to charge the second battery pack 400; or, the first voltage converter can convert the voltage output by the second battery pack 400 into the charging voltage of the first battery pack 300, thereby enabling the second battery pack 400 to charge the first battery pack 300.

[0340] The first voltage converter enables the first battery pack 300 to charge the second battery pack 400, or vice versa.

[0341] In some embodiments, see Figure 13 and Figure 14 As shown, the battery device 1100 also includes a battery information management component, which is further used to control the second battery pack 400 to charge the first battery pack 300 through the first voltage conversion module 220 in a first preset state; wherein, the first preset state includes at least one of the following states: (1) when the remaining power of the first battery pack 300 is lower than the power threshold; (2) when the remaining power of any first battery cell 310 in the first battery pack 300 is lower than the first threshold; (3) when the voltage of any first battery cell 310 in the first battery pack 300 is lower than the second threshold.

[0342] For example, the battery information management component may be a Battery Management System (BMS). The BMS is used to perform at least one of the following functions on the battery device 1100: state monitoring, state analysis, charge / discharge control, safety protection, thermal management, high-voltage power distribution, and information management. In addition, the BMS may also be configured to implement at least some of the functions of the controller 1200 in the electrical device, such as implementing some functions of the vehicle control unit (VCU) or the motor control unit (MCU), which is not limited in this application.

[0343] It should be noted that the physical device of the battery management system in this application can be integrated into the battery device 1100, such as into the battery pack; it can also be integrated into the power consumption device, such as into the vehicle 1000 or the chassis of the vehicle 1000; or it can be integrated into the charging device, such as into the charging device or the battery swapping device.

[0344] The battery management system in this application can also be deployed as control software on a server. The server can be a standalone physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, knowledge computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDN (Content Delivery Network), and big data and artificial intelligence platforms, such as vehicle networking cloud, APP backend, etc.

[0345] When the remaining charge of the first battery pack 300 is lower than a set charge threshold, the first preset state is met. The charge threshold is a preset value used to measure whether the charge of the first battery pack 300 is too low. For example, when the charge threshold is set to 20%, once the remaining charge of the first battery pack 300 drops below 20%, the battery information management component will consider that the first preset state is met, and thus trigger the corresponding charging operation.

[0346] In the first battery pack 300, if the remaining charge of any single first battery cell 310 is less than a first threshold, it is considered to be in the first preset state. This is because even if the charge of the entire battery pack 1001 may not have reached a very low level, the excessively low charge of individual first battery cells 310 may affect the performance and lifespan of the entire battery pack 1001. For example, if the first threshold is set to 15%, if the remaining charge of any first battery cell 310 in the first battery pack 300 drops below 15%, charging of the first battery pack 300 will be triggered.

[0347] When the voltage of any first battery cell 310 in the first battery pack 300 is lower than the second threshold, the first preset state is also satisfied. The voltage of the first battery cell 310 is an important indicator reflecting its charging status and performance. Too low a voltage may mean that the first battery cell 310 has a problem or insufficient power. For example, if the second threshold is set to 3.0V, when the voltage of a first battery cell 310 in the first battery pack 300 is lower than 3.0V, the battery information management component will activate the second battery pack 400 to charge the first battery pack 300.

[0348] In the first preset state, the battery information management component controls the second battery pack 400 to charge the first battery pack 300 through the first voltage conversion module 220. This indicates that the battery information management component has the ability to control energy transfer between battery packs 1001. The first voltage conversion module 220 can convert the voltage output by the second battery pack 400 into a voltage suitable for charging the first battery pack 300, making the charging process safe and efficient. In this way, energy allocation between battery packs 1001 within the battery device 1100 is realized. When the first battery pack 300 is low on power or the first battery cell 310 is in an abnormal state, the power of the second battery pack 400 is used to supplement it, improving the reliability and stability of the entire battery device 1100 and making better use of battery resources.

[0349] In some embodiments, see Figure 13 and Figure 14 As shown, the load 900 includes a first load 910, and the battery device 1100 also includes a battery information management component. The battery information management component is also used to control the second battery pack 400 to charge the first battery pack 300 through the first voltage conversion module 220 and control the first battery pack 300 to provide a first voltage to the first load 910 in a second preset state. The second preset state includes the first battery pack 300 outputting a first voltage to the first load 910, and at least one of the following states: (1) when the remaining power of the first battery pack 300 is less than 30%; (2) when the remaining power of any first battery cell 310 in the first battery pack 300 is less than a first threshold; (3) when the voltage of any first battery cell 310 in the first battery pack 300 is less than a second threshold.

[0350] When the remaining charge of the first battery pack 300 is below 30%, the second preset state is met. This is based on the overall power level. When the charge of the first battery pack 300 drops to a certain level, it may affect the continuous and stable power supply of the first load 910. At this time, it is necessary to start charging the first battery pack 300 to reduce the impact on the first load 910.

[0351] If any single battery cell 310 in the first battery pack 300 has a remaining charge less than the first threshold, it also falls under the second preset state. This is because even if the overall charge of the first battery pack 300 is not too low, the low charge of individual battery cells 310 may cause problems such as performance degradation or shortened lifespan of the entire battery pack 1001. Therefore, it is necessary to start charging the first battery pack 300 to reduce the impact on the first battery pack 300.

[0352] When the voltage of any one of the first battery cells 310 in the first battery pack 300 is lower than the second threshold, the second preset state is also satisfied. The voltage of the first battery cell 310 is a key indicator reflecting its charging status and performance. If the voltage is too low, it may indicate that the first battery cell 310 is faulty or has a serious lack of power. Therefore, it is necessary to start charging the first battery pack 300 to reduce the impact on the first battery pack 300.

[0353] In the second preset state, the battery information management component will perform the following two important control operations: The second battery pack 400 charges the first battery pack 300 via the first voltage conversion module 220. When the first battery pack 300 experiences abnormal power or voltage, it is replenished by the power of the second battery pack 400 to maintain the power level and performance of the first battery pack 300, ensuring a continuous and stable power supply to the first load 910. The first voltage conversion module 220 converts the voltage output from the second battery pack 400 into a voltage suitable for charging the first battery pack 300, which improves the safety and efficiency of the charging process.

[0354] The first battery pack 300 continues to provide the first voltage to the first load 910. Even if the first battery pack 300 experiences some issues with its charge or voltage, it can still supply power to the first load 910 normally. In this way, the first battery pack 300 can be replenished and its performance maintained without affecting the normal operation of the first load 910, thus improving the reliability and stability of the entire battery device 1100.

[0355] In some embodiments, the second battery pack 400 includes at least one negative electrode-free battery cell; the battery device 1100 includes a thermal management component 70 and a battery information management component, the thermal management component 70 being used to regulate the temperature of the second battery pack 400; the battery information management component being used to control the thermal management component 70 to regulate the battery temperature of the second battery pack 400 to be greater than 40°C when the second battery pack 400 is in a charging state; the load 900 includes a first load 910, and the battery device 1100 is used to connect to the first load 910; the first battery pack 300 and the second battery pack 400 are connected, and the second battery pack 400 is used to output a first voltage to the first load 910.

[0356] The battery temperature of the second battery pack 400 is greater than 40°C; for example, it can be any of the above-mentioned values ​​or within any range of any two of them, such as 40.1°C, 41°C, 42°C, 43°C, 44°C, 45°C, 45.5°C, 46°C, 47°C, 48°C, 49°C, 50°C, 51°C, 52°C, 53°C, 54°C, 55°C, 56°C, 57°C, 57.6°C, 58°C, 59°C, 60°C, 61°C, 62°C, 63°C, 64°C, 65°C, 66°C, 67°C, 68°C, 69°C, 70°C.

[0357] Because the second battery pack 400 uses at least one negative electrode-free battery cell, and the negative electrode-free battery cell has a high energy density, the second battery pack 400 can store more electrical energy in the same volume or weight. This allows the second battery pack 400 to continuously supply power to the first load 910 for a longer period of time, or, within the same power supply time, a smaller and lighter battery pack 1001 can be used, thereby improving the portability and space utilization of the entire battery device 1100. In addition, when the second battery pack 400 is in charging mode, the battery information management component controls the thermal management component 70 to adjust the battery temperature of the second battery pack 400 to above 40°C. At this temperature, the chemical reaction inside the negative electrode-free battery cell can be more complete and efficient, helping to take advantage of its high energy density and improve the battery's charging and discharging efficiency.

[0358] In some embodiments, the battery device 1100 further includes a battery information management component, the second battery pack 400 includes at least one negative electrode-free battery cell, the second main terminal 420 is connected to the first voltage conversion module 220, and the battery information management component is used to control the first voltage conversion module 220 to charge the second battery pack 400 at a first rate when the battery device 1100 is in a charging state, the first rate being ≤1C.

[0359] For example, the first multiplier can be 1C or any value less than 1C, for example, 0.1C, 0.2C, 0.5C, 0.8C, 1C.

[0360] In the second battery pack 400, at least one second battery cell 410 is a negative electrode-free battery cell. The charging voltage is adjusted and converted by the first voltage conversion module 220 to meet the charging requirements of the second battery pack 400. When the battery device 1100 is in charging mode, the battery information management component controls the first voltage conversion module 220 to charge the second battery pack 400 at a first rate ≤ 1C. "C" represents the battery's charge / discharge rate; 1C represents the current required to fully charge or discharge the battery in one hour. During charging, the internal chemical reactions of a negative electrode battery cell are relatively complex. Limiting the charging rate to ≤ 1C allows for a more gentle and uniform chemical reaction within the negative electrode-free battery cell, reducing polarization and side reactions in the electrode materials, thereby extending the battery's cycle life. Low-rate charging also helps reduce heat generation in the battery device 1100 during charging, reducing safety risks such as thermal runaway.

[0361] By limiting the charging rate, the stability and safety of the battery device 1100 during the charging process can be better guaranteed.

[0362] In some embodiments, see Figure 15 As shown, the capacity of the second battery pack 400 can be set to be smaller, and it occupies a smaller space within the housing 100. It is used as a backup power source. In the event of an abnormality in the first battery pack 300, the second battery pack 400 can temporarily supply power to the first load 910, allowing the electrical device to continue operating. The smaller space occupied by the second battery pack 400 within the housing 100 allows the first battery pack 300 to have sufficient capacity to meet the normal use of the electrical device. In addition, the smaller space occupied by the second battery pack 400 within the housing 100 and its placement between the first battery pack 300 and the switch module 210 make the second battery pack 400 less susceptible to collision damage. This allows the second battery pack 400 to stably supply power to the first load 910 and the second load 920, enabling the vehicle 1000 to travel a certain distance after a collision.

[0363] In some embodiments, see Figure 16 As shown, the first battery pack 300 and the second battery pack 400 are used to provide a first voltage to the first load 910 respectively; some battery cells 1002 in the first battery pack 300 and some battery cells 1002 in the second battery pack 400 are connected to the second voltage conversion module 230, which is used to provide a second voltage to the second load 920 respectively through the second voltage conversion module 230.

[0364] The first battery pack 300 includes multiple first battery cells 310, and the second battery pack 400 includes multiple second battery cells 410. The first battery pack 300 and the second battery pack 400 can each independently output a first voltage to the first load 910 via the first power supply circuit 240. Some battery cells 1002 in the first battery pack 300 can independently output a second voltage to the second load 920 via the second voltage conversion module 230. Some battery cells 1002 in the second battery pack 400 can also independently output a second voltage to the second load 920 via the second voltage conversion module 230. Alternatively, in the event of an abnormality in the first battery pack 300, some normal battery cells 1002 in the first battery pack 300 or some normal battery cells 1002 in the second battery pack 400 can be selected to provide the first voltage to the first load 910, thereby providing multiple redundant power supplies to the first load 910 and the second load 920 respectively. This reduces the safety hazards caused by power failure of the first load 910 or the second load 920 and is beneficial to the stability of the internal electronic control system and drive system of the vehicle 1000.

[0365] In some embodiments, see Figure 16 As shown, the first battery pack 300 is used to provide a first voltage to the first load 910; the second battery pack 400 or some of the battery cells 1002 in the first battery pack 300 are connected to the second voltage conversion module 230, and are used to provide the first voltage to the first load 910 through the second voltage conversion module 230.

[0366] In this embodiment, the first battery pack 300 can independently output a first voltage to the first load 910, and the second battery pack 400 or some battery cells 1002 in the first battery pack 300 can independently output a second voltage to the second load 920 through the second voltage conversion module 230. In the event of an abnormality in the first battery pack 300, the second battery pack 400 or some normal battery cells 1002 in the first battery pack 300 can be selected to provide a second voltage to the second load 920 through the second voltage conversion module 230, thereby providing a multi-redundant power supply for the second load 920.

[0367] In some embodiments, see Figure 17 As shown, the battery device 1100 includes a first battery pack 300, a second battery pack 400, and a third battery pack 500. The third battery pack 500 is connected to a main positive relay K43 and a main negative relay K41 via a fourth voltage conversion module 280. The battery information management component can control the fourth voltage conversion module 280 to convert the voltage provided by the third battery pack 500 into a first voltage, and output it to the first output interface 710 via the main positive relay K43 and the main negative relay K41 to supply power to the first load 910.

[0368] In this embodiment, the first battery pack 300 and the second battery pack 400 can be connected in series through the third switch K11. The first battery pack 300 and the second battery pack 400 can also be connected in parallel through the first switch K21 and the second switch K22. The first battery pack 300 and the second battery pack 400 connected in parallel can convert the first voltage provided by the first battery pack 300 and the second battery pack 400 into a second voltage through the second voltage converter 232 and output it to the second output interface 720 to supply power to the second load 920. The first battery pack 300 and the second battery pack 400, after being connected in parallel, can also convert the first voltage provided by the first battery pack 300 and the second battery pack 400 into a second voltage through the first voltage conversion device 231 and output it to the second output interface 720 to power the second load 920. The third battery pack 500 can directly provide the second voltage to the second output interface 720. In the event of any abnormality in any of the battery packs 1001 or the fourth voltage conversion module 280, another battery pack 1001 can be selected to output the first voltage to the first output interface 710 through the corresponding power supply circuit to power the first load 910. In addition, another battery pack 1001 can be selected to output the second voltage to the second output interface 720 through the corresponding power supply circuit to power the second load 920, so as to avoid the safety hazards caused by the power failure of the first load 910 and the second load 920. Thus, it is determined that the first load 910 and the second load 920 can both have at least two power supply circuits to power them, which is beneficial to the stability of the internal electronic control system and drive system of the vehicle 1000.

[0369] In some embodiments, the output voltage of the first battery pack 300 and the second battery pack 400 is 400V. Figure 12The working principle of the battery device 1100 is explained below. The battery information management component can turn on the third switch K11 and turn off the first switch K21 and the second switch K22. The first battery pack 300 and the second battery pack 400 are connected in series. The battery pack 1001 connected in series can output a second voltage to the second output interface 720 through the first voltage converter 231 and / or the second voltage converter 232. It can also output an 800V power supply voltage to the first output interface 710 through the main positive relay K43 and the main negative relay K41 to supply power to the first load 910. If any of the first battery pack 300, the first voltage converter 231, the third battery pack 500, and the fourth voltage conversion module 280 malfunctions, or if they malfunction simultaneously, the second battery pack 400 can provide a second voltage to the second output interface 720 through the second voltage converter 232 to power the second load 920. Furthermore, when the second battery pack 400 malfunctions, the battery information management component can control the first switch K21 to be turned on and the third switch K11 and the second switch K22 to be turned off. The first battery pack 300 will then output a 400V power supply voltage to the first output interface 710 through the main positive relay K43 and the main negative relay K41 to power the first load 910, ensuring the power supply stability of the vehicle 1000 during driving, realizing seamless power supply switching, and improving the safety of the vehicle 1000.

[0370] In some embodiments, see Figure 18 As shown, the battery device 1100 includes a fourth battery pack 600, a first battery pack 300, and a second battery pack 400. The positive terminal 1003 of the first battery pack 300 is connected to the positive terminal 1003 of the first sub-port 7101 via a first switch K21, and the negative terminal 1004 of the first battery pack 300 is connected to the negative terminal 1004 of the first sub-port 7101 via a first fuse F11. The positive terminal 1003 of the second battery pack 400 is connected to the positive terminal 1003 of the first sub-port 7101 via a second fuse F12, and the negative terminal 1004 of the second battery pack 400 is connected to the negative terminal 1004 of the first sub-port 7101 via a second switch K22. Furthermore, the negative terminal 1004 of the second battery pack 400 is connected to the positive terminal 1003 of the first battery pack 300 via a third switch K11. The positive terminal 1003 of the fourth battery pack 600 is connected to the positive terminal 1003 of the second sub-port 7102 via the main positive relay K45. The negative terminal 1004 of the fourth battery pack 600 is connected to the negative terminal 1004 of the second sub-port 7102 via the main negative relay K44. The pre-charge relay K46 and the pre-charge resistor R42 are connected in series and then in parallel with the main positive relay K45.

[0371] In this embodiment, the switch module 210 includes a switch K4. The positive terminal 1003 of the fourth battery pack 600 is connected to the positive terminal 1003 of the first battery pack 300 through the switch K4. The fourth battery pack 600 can provide a first voltage to the second sub-port 7102 to power the first load 910 connected to the second sub-port 7102. The first battery pack 300 and the second battery pack 400 can provide a first voltage to the first sub-port 7101 to power the first load 910 connected to the first sub-port 7101. The battery device 1100 can be provided with multiple first output interfaces 710. The multiple first output interfaces 710 include a second sub-port 7102 and a second sub-port 7101. The second sub-port 7102 and the first sub-port 7101 can supply power to the front drive system and the rear drive system of the vehicle 1000 respectively. When one drive system has a power supply failure, the other drive system can take over the power of the vehicle 1000, so as to achieve the purpose of seamless switching between the power supply and the electronic control power of the vehicle 1000 and improve the safety of the vehicle 1000.

[0372] In some embodiments, the output voltage of the fourth battery pack 600, the first battery pack 300, and the second battery pack 400 is 400V. Figure 13 The working principle of the battery device 1100 is explained as follows: When the vehicle 1000 is in driving mode, the first switch K21, switch K4 and the second switch K22 are turned off, the third switch K11 is turned on, the first battery pack 300 and the second battery pack 400 are connected in series, thereby providing a voltage of 800V to the first sub-port 7101, so as to provide a power supply voltage of 800V to the first load 910 connected to the first sub-port 7101, so that the drive system operates with 800V as the working voltage, which meets the needs of high voltage application scenarios in the vehicle 1000.

[0373] If any one of the fourth battery pack 600, the first battery pack 300, or the second battery pack 400 malfunctions, the control switch module 210 will bypass the malfunctioning battery pack 1001, and the normal battery pack 1001 will supply 400V to the first load 910 through the first power supply circuit 240. For example, if the fourth battery pack 600 malfunctions, the control main positive relay K45, the precharge relay K46, and the switch K4 will be turned off, and the first battery pack 300 and the second battery pack 400 will supply 400V to the first load 910 connected to the first sub-port 7101 through the first power supply circuit 240. The 400V power supply enables the drive system to operate at 400V. In the event of an abnormality in the second battery pack 400, the second switch K22 and the third switch K11 are turned off. The first battery pack 300 then supplies 400V to the first load 910 connected to the first sub-port 7101 through the first power supply circuit 240, enabling the drive system to operate at 400V. This provides redundant backup power to the drive load 900 within the vehicle 1000, meeting the normal operation requirements of the drive system within the vehicle 1000 and improving the power supply stability of the battery device 1100.

[0374] In charging mode, the battery information management component can control the third switch K11, the second switch K22, and the first switch K21 to make the first battery pack 300 and the second battery pack 400 compatible with both 400V and 800V charging piles. When the output voltage of the charging pile is 400V, the first battery pack 300 and the second battery pack 400 are connected in parallel. When the output voltage of the charging pile is 800V, the first battery pack 300 and the second battery pack 400 are connected in series.

[0375] In charging mode, the battery device 1100 is compatible with 400V and 800V charging piles for charging. If the input interface 800 is connected to a 400V charging pile, the first switch K21 and the second switch K22 are turned on, the third switch K11 is turned off, and the main positive relay K43, the main negative relay K41, the positive charging relay K51, and the negative charging relay K52 are closed. The input interface 800 charges the fourth battery pack 600, the first battery pack 300, and the second battery pack 400 by providing a 400V charging voltage to them.

[0376] If the input interface 800 is connected to an 800V charging pile, the first switch K21, the second switch K22, and the switch K4 are open, the third switch K11 is closed, and the main positive relay K43, the main negative relay K41, the positive charging relay K51, and the negative charging relay K52 are closed. The input interface 800 provides an 800V charging voltage to the first battery pack 300 and the second battery pack 400 connected in series, thereby charging the first battery pack 300 and the second battery pack 400.

[0377] In some embodiments, see Figure 19 As shown in a), the battery device 1100 also includes a first power distribution device 291. The first main terminal 320 and the second main terminal 420 are electrically connected to the first power distribution device 291 through the switch module 210. The first power distribution device 291 is electrically connected between the first load 910 and the switch module 210. The switch module 210 is integrated into the first power distribution device 291.

[0378] The first power distribution device 291 can refer to the component in the battery device 1100 that plays a role in power distribution and management. The first power distribution device 291 can also be called a high-voltage box. The first power distribution device 291 receives power from the first main terminal 320 and the second main terminal 420. This power may come from different battery packs 1001 or other power sources. Then, according to the system's needs, it distributes the power to the first load 910 and other possible loads 900 or circuits. Simultaneously, the first power distribution device 291 may also have some protection functions, such as overvoltage protection, overcurrent protection, and short-circuit protection, to ensure the safe operation of the equipment and circuits connected to it. The first power distribution device 291 may include, but is not limited to, the pre-charging circuit 531 and DC charging circuit 532, the main positive relay K43 and the main negative relay K41, the first fuse F11, and the second fuse F12.

[0379] The switch module 210 allows for selective connection of either the first main terminal 320 or the second main terminal 420 to the first power distribution device 291, thereby controlling the power transmission path. For example, when power needs to be supplied from the first battery pack 300 to the first load 910, the switch module 210 can connect the first main terminal 320 to the first power distribution device 291 to achieve power transmission; conversely, when power is not needed from the first battery pack 300, the switch module 210 can disconnect the connection to save energy or perform other operations.

[0380] The first power distribution device 291 is located between the first load 910 and the switching module 210, so that the electrical energy output from the switching module 210 first enters the first power distribution device 291, and then is distributed to the first load 910 by the first power distribution device 291. This positional relationship allows the first power distribution device 291 to perform various processing and control on the electrical energy to be delivered to the first load 910, such as regulating voltage, stabilizing current, and distributing electrical energy, to meet the operating requirements of the first load 910. At the same time, the first power distribution device 291 can also monitor the operating status of the first load 910, for example, by detecting parameters such as current and voltage to determine whether the first load 910 is working normally. Once an abnormality is detected, measures can be taken in time, such as cutting off the power supply, to protect the first load 910 and the entire circuit system.

[0381] The switch module 210 is integrated into the first power distribution device 291. The switch module 210 is located in the first cooperating device, and the switch module 210 and the first power distribution device 291 are integrated into one component.

[0382] By adopting the technical solution of this embodiment, the switch module 210 is integrated into the first power distribution device 291, which can reduce the size and weight of the entire battery device 1100, making the battery device 1100 more compact and lightweight. This is very important for space-constrained applications, such as electric vehicles and portable electronic devices, as it can improve the integration and space utilization of the device.

[0383] In some embodiments, the switch module 210 may not be integrated into the first power distribution device 291, and the switch module 210 and the first power distribution device 291 may form two independent components.

[0384] In some embodiments, see Figure 19 As shown in b), the battery device 1100 also includes a second power distribution device 292 and a third power distribution device 293. The second power distribution device 292 is electrically connected between the first main terminal 320 and the switch module 210, and the second main terminal 420 is electrically connected between the second main terminal 420 and the switch module 210. In this way, the electrical energy output by the first battery pack 300 is distributed by the second power distribution device 292 and then enters the switch module 210. The electrical energy output by the switch module 210 directly supplies the load 900. The electrical energy output by the second battery pack 400 is distributed by the third power distribution device 293 and then enters the switch module 210. The second power distribution device 292 and the third power distribution device 293 separately distribute and manage the electrical energy output by the first battery pack 300 and the second battery pack 400, which helps to improve the reliability of the battery device 1100.

[0385] In some embodiments, see Figure 19As shown in c), the battery device 1100 also includes a first power distribution device 291, a second power distribution device 292, and a third power distribution device 293. The second power distribution device 292 is electrically connected between the first main terminal 320 and the switch module 210, and the second power distribution device 292 is electrically connected between the second main terminal 420 and the switch module 210. Thus, the electrical energy output from the first battery pack 300 is distributed by the second power distribution device 292 before entering the switch module 210, and the electrical energy output from the switch module 210 is distributed by the first power distribution device 291. After being distributed and managed, the power output from the second battery pack 400 is distributed by the third power distribution device 293 before entering the switch module 210. The second power distribution device 292 and the third power distribution device 293 separately distribute and manage the power output from the first battery pack 300 and the second battery pack 400. At the same time, the power output from the switch module 210 is managed and distributed by the first power distribution device 291 and then provided to the subsequent load 900, which helps to improve the reliability of the battery device 1100.

[0386] In some embodiments, the voltage output by the switching module 210 can be converted by the first voltage conversion module 220 and / or the second voltage conversion module 230, thereby supplying the corresponding first load 910 and second load 920.

[0387] In some embodiments, the voltage output by the first power distribution device 291 can be converted by the first voltage conversion module 220 and / or the second voltage conversion module 230, thereby supplying the corresponding first load 910 and second load 920.

[0388] In some embodiments, see Figure 20 As shown in a), the switch module 210 is located inside the housing 100, and the first main terminal 320 and the second main terminal 420 are electrically connected to the first output interface 710 through the switch module 210.

[0389] The switch module 210 is located inside the housing 100. The first main terminal 320 and the second main terminal 420 are electrically connected to the first output interface 710 through the switch module 210. It can be understood that the first main terminal 320 and the second main terminal 420 are not directly connected to the first output interface 710, but are indirectly connected through the switch module 210.

[0390] By adopting the technical solution of this embodiment, the switch module 210 is located inside the housing 100, which helps protect the switch module 210 from external environmental factors such as dust, moisture, and physical impact. It also makes the overall structure of the battery device 1100 more compact and organized, facilitating integration and management. Furthermore, the first load 910 is directly electrically connected to the first output interface 710, forming a redundant power supply system for the first load 910. Establishing a redundant power supply system is simpler and more convenient.

[0391] In some embodiments, the housing 100 is provided with a battery cavity 101 and an electrical cavity 102, and the first battery pack 300 and the second battery pack 400 are disposed in the battery cavity 101; the switch module 210 is located in the battery cavity 101 or the electrical cavity 102.

[0392] The internal space of the housing 100 forms a battery cavity 101 and an electrical cavity 102. The battery cavity 101 is used to accommodate the first battery pack 300 and the second battery pack 400, and the electrical cavity 102 is used to accommodate electrical components 200. The electrical components 200 may include, but are not limited to, a first power distribution device 291, a first voltage conversion module 220, a second voltage conversion module 230, and electronic components for managing the battery device 1100.

[0393] In some examples, see Figure 20 As shown in a), the switch module 210 is located in the battery compartment 101. The switch module 210 can be closer to the first battery pack 300 and the second battery pack 400, reducing the length of the connecting lines, reducing line resistance and energy loss, and also facilitating direct control and management of the battery pack 1001, such as quickly cutting off the circuit when the battery pack 1001 malfunctions.

[0394] In some examples, see Figure 20 As shown in b), the switch module 210 is located in the electrical cavity 102. The switch module 210 is an electronic component, and its centralized layout with other electrical components facilitates unified electrical connection and control, improving the integration and maintainability of the entire battery device 1100. Furthermore, the electrical cavity 102 may have better electromagnetic shielding measures, helping to reduce the impact of electromagnetic interference generated by the switch module 210 during operation on other components, particularly the battery pack 1001, thereby improving the stability and reliability of the battery device 1100.

[0395] By adopting the technical solution of this embodiment, the installation position of the switch module 210 can be flexibly set to meet different usage requirements, thereby optimizing the performance and reliability of the entire battery device 1100.

[0396] In some embodiments, see Figure 20As shown in a), the first voltage conversion module 220 is located inside the housing 100, and at least one of the first main terminal 320 and the second main terminal 420 is electrically connected to the first output interface 710 through the first voltage conversion module 220.

[0397] The first voltage conversion module 220 is located in the battery cavity 101 or the electrical cavity 102.

[0398] At least one of the first main terminal 320 and the second main terminal 420 is electrically connected to the first output interface 710 through the first voltage conversion module 220, so that the first battery pack 300 and / or the second battery pack 400 both output the first voltage through the first output interface 710, which facilitates the electrical connection between the first load 910 and the first output interface 710.

[0399] By adopting the technical solution of this embodiment, the first voltage conversion module 220 is placed inside the housing 100, which helps to protect the first voltage conversion module 220 from external environmental factors, such as dust, water vapor and mechanical impact. At the same time, it is also conducive to realizing the compact design of the entire battery device 1100, which facilitates the layout and connection of internal circuits, and makes the overall structure of the battery device 1100 more regular and orderly.

[0400] In some embodiments, see Figure 20 As shown in a), the first voltage conversion module 220 is located inside the battery cavity 101, which can reduce the impact of the external environment on the first voltage conversion module 220.

[0401] In some examples, the battery cavity 101 includes a first battery cavity 1011 and a second battery cavity 1012. A first battery pack 300 is disposed in the first battery cavity 1011, and a second battery pack 400 is disposed in the second battery cavity 1012. A first voltage conversion module 220 may be disposed in the first battery cavity 1011 or the second battery cavity 1012. A portion of the first voltage conversion module 220 is located in the first battery cavity 1011, and another portion of the first voltage conversion module 220 is located in the second battery cavity 1012.

[0402] In some examples, the first voltage conversion module 220 is located at the top of the battery cavity 101.

[0403] In some embodiments, see Figure 20As shown in b), the first voltage conversion module 220 is located inside the electrical cavity 102 and is independently set up with the first power distribution device 291. The first voltage conversion module 220 and the electrical components 200 inside the electrical cavity 102 are highly integrated, occupying a small volume. The first voltage conversion module 220 is placed in the electrical cavity 102 in a sealed state. It is sufficient to place the first voltage conversion module 220 inside the electrical cavity 102 without additional sealing of the first voltage conversion module 220. That is, the first voltage conversion module 220 does not need to be sealed separately. The first voltage conversion module 220 is independent of the first power distribution device 291, the component structure is simple, and it is not easily affected by the thermal runaway of the battery pack 1001.

[0404] In some embodiments, see Figure 20 As shown in c), the first voltage conversion module 220 is located in the electrical cavity 102 and integrated with the first power distribution device 291. The first voltage conversion module 220 and the electrical components 200 in the electrical cavity 102 are highly integrated, occupying a small volume. The first voltage conversion module 220 does not need to be sealed separately when placed in the electrical cavity 102. The integration of the first voltage conversion module 220 with the first power distribution device 291 further reduces the space occupied, which also helps to simplify the assembly process and improve assembly efficiency. In addition, it is not easily affected by the thermal runaway of the battery pack 1001.

[0405] In some embodiments, see Figure 20 As shown in a), the second voltage conversion module 230 is located inside the housing 100, and at least one of the first main terminal 320 and the second main terminal 420 is electrically connected to the second output interface 720 through the second voltage conversion module 230.

[0406] The second voltage conversion module 230 is located in the battery cavity 101 or the electrical cavity 102.

[0407] At least one of the first main terminal 320 and the second main terminal 420 is electrically connected to the second output interface 720 through the second voltage conversion module 230, so that the first battery pack 300 and / or the second battery pack 400 both output the second voltage through the second output interface 720, which facilitates the electrical connection of the second load 920 and the second output interface 720.

[0408] By adopting the technical solution of this embodiment, the second voltage conversion module 230 is placed inside the housing 100, which helps to protect the second voltage conversion module 230 from external environmental factors, such as dust, moisture and mechanical impact. At the same time, it is also conducive to the compact design of the entire battery device 1100, which facilitates the layout and connection of internal circuits, and makes the overall structure of the battery device 1100 more regular and orderly.

[0409] In some embodiments, see Figure 20As shown in a), both the first main terminal 320 and the second main terminal 420 are electrically connected to the second voltage conversion module 230. The second voltage conversion module 230 is located inside the battery cavity 101. The four-phase input of the first main terminal 320 is converted into two-phase output inside the battery cavity 101, which makes the four-phase wiring distance shorter, the structure of the second voltage conversion module 230 to the electrical cavity 102 simpler, and the sealing is easier to achieve.

[0410] In some examples, the battery cavity 101 includes a first battery cavity 1011 and a second battery cavity 1012. A first battery pack 300 is disposed in the first battery cavity 1011, a second battery pack 400 is disposed in the second battery cavity 1012, and a second voltage conversion module 230 may be disposed in the first battery cavity 1011 or the second battery cavity 1012. A portion of the first voltage conversion module 220 is located in the first battery cavity 1011, and another portion of the first voltage conversion module 220 is located in the second battery cavity 1012.

[0411] In some examples, the second voltage conversion module 230 is located at the top of the battery cavity 101.

[0412] In some embodiments, see Figure 20 As shown in b), the second voltage conversion module 230 is located in the electrical cavity 102 and is independently set up with the first power distribution device 291. The second voltage conversion module 230 and the electrical components 200 in the electrical cavity 102 are highly integrated, occupying a small volume. The second voltage conversion module 230 does not need to be sealed separately when placed in the electrical cavity 102. The second voltage conversion module 230 is independent of the first power distribution device 291, and the component structure is simple. In addition, it is not easily affected by the thermal runaway of the battery pack 1001.

[0413] In some embodiments, see Figure 20 As shown in c), the second voltage conversion module 230 is located in the electrical cavity 102 and integrated with the first power distribution device 291. The second voltage conversion module 230 and the electrical components 200 in the electrical cavity 102 are highly integrated, occupying a small volume. The second voltage conversion module 230 does not need to be sealed separately when placed in the electrical cavity 102. The integration of the second voltage conversion module 230 with the first power distribution device 291 further reduces the space occupied, which also helps to simplify the assembly process and improve assembly efficiency. In addition, it is not easily affected by the thermal runaway of the battery pack 1001.

[0414] In some embodiments, see Figure 21 As shown, the first main terminal 320 and the second main terminal 420 are located on the same side of the first battery pack 300 and the second battery pack 400.

[0415] In some examples, see Figure 21As shown in a), the battery device 1100 includes two battery packs 1001 arranged side by side. One battery pack 1001 forms a first battery pack 300, and the other battery pack 1001 forms a second battery pack 400. Both battery packs 1001 have two interfaces 1005 (positive interface 1003 and negative interface 1004). The two interfaces 1005 of the first battery pack 300 form a first main terminal 320, and the two interfaces 1005 of the second battery pack 400 form a second main terminal 420.

[0416] In some examples, see Figure 21 As shown in b), the battery device 1100 includes three battery packs 1001, which are arranged in two columns. One battery pack 1001 forms one column, and the other two battery packs 1001 form another column. One of the two battery packs 1001 in the column forms a first battery pack 300, and the other two battery packs 1001 are connected in series to form a second battery pack 400. The first battery pack 300 and the second battery pack 400 each have two interfaces 1005. The two interfaces 1005 of the first battery pack 300 form a first main terminal 320, and the two interfaces 1005 of the second battery pack 400 form a second main terminal 420.

[0417] In some examples, see Figure 22 As shown in a), the battery device 1100 includes three battery packs 1001 arranged side by side. The two battery packs 1001 on the left are connected in series to form a first battery pack 300, and the other battery pack 1001 forms a second battery pack 400. The first battery pack 300 and the second battery pack 400 each have two interfaces 1005. The two interfaces 1005 of the first battery pack 300 form a first main terminal 320, and the two interfaces 1005 of the second battery pack 400 form a second main terminal 420.

[0418] In some examples, see Figure 22 As shown in b), the battery device 1100 includes three battery packs 1001 arranged side by side. The two battery packs 1001 on the left are connected in series to form a first battery pack 300, and the other battery pack 1001 forms a second battery pack 400. The first battery pack 300 has three interfaces 1005, and the second battery pack 400 has two interfaces 1005. The three interfaces 1005 of the first battery pack 300 form a first main terminal 320, and the two interfaces 1005 of the second battery pack 400 form a second main terminal 420.

[0419] In some examples, see Figure 22As shown in c), the battery device 1100 includes three battery packs 1001 arranged side by side. Each battery pack 1001 has two interfaces 1005. Two battery packs 1001 form a first battery pack 300, and the four interfaces 1005 of the first battery pack 300 form a first main terminal 320. The other battery pack 1001 forms a second battery pack 400, and the two interfaces 1005 of the second battery pack 400 form a second main terminal 420.

[0420] By adopting the technical solution of this embodiment, the first main terminal 320 and the second main terminal 420 are located on the same side of the first battery pack 300 and the second battery pack 400, which facilitates the electrical connection of the first main terminal 320 and the second main terminal 420 to the output interface 700, and also saves on the connection lines between the first main terminal 320 and the second main terminal 420 and the output interface 700. This reduces the length of the lines, thereby reducing line resistance and reducing power loss during transmission. At the same time, shorter lines also help improve circuit reliability and reduce the risk of short circuits, open circuits, and other abnormalities that may occur due to excessively long lines.

[0421] Please refer to Figure 23 and Figure 24 In some embodiments, the housing 100 is provided with a battery cavity 101, which includes a first battery cavity 1011 and a second battery cavity 1012. A first battery pack 300 is disposed in the first battery cavity 1011, and a second battery pack 400 is disposed in the second battery cavity 1012. A partition structure 30 is provided between the first battery cavity 1011 and the second battery cavity 1012. The partition structure 30 is capable of blocking at least a portion of the emissions emitted by at least one of the first battery pack 300 and the second battery pack 400 in the event of thermal runaway.

[0422] The housing 100 contains a battery cavity 101 and a partition structure 30. The battery cavity 101 is used to accommodate individual battery cells 1002. The partition structure 30 is a structure capable of dividing the internal space of the housing 100. For example, the partition structure 30 may include partition beams, partition plates, blocks, barrier nets, etc. The partition structure 30 divides the battery cavity 101, such that the battery cavity 101 forms at least one first battery cavity 1011 and one second battery cavity 1012. There are various arrangements of the first battery cavity 1011 and the second battery cavity 1012, for example, such as... Figure 23 As shown, the first battery cavity 1011 and the second battery cavity 1012 are arranged along the width direction of the housing 100.

[0423] When thermal runaway occurs in battery cell 1002, the high-temperature, high-pressure substances inside battery cell 1002 will be discharged outwards as emissions. In this way, the battery cell 1002 can be depressurized under controllable pressure, thereby avoiding potentially more serious accidents. The emissions from battery cell 1002 mentioned in this application include, but are not limited to: electrolyte, dissolved or broken positive and negative electrode plates, fragments of separators, high-temperature, high-pressure gases generated by the reaction, flames, etc.

[0424] The separator 30 may include a fully sealed structure and / or a semi-sealed structure, such that the separator 30 is able to block at least a portion of the emissions emitted after thermal runaway of the battery cell 1002. For example, the separator 30 is able to block at least particulate matter, including dissolved or broken positive and negative electrode plates, fragments of separators, etc.; for example, the separator 30 may also be configured to block both particulate matter and gas.

[0425] The partition structure 30 is disposed between the first battery cavity 1011 and the second battery cavity 1012. If the first battery cell 310 in the first battery cavity 1011 experiences thermal runaway and generates emissions, the partition structure 30 can prevent the emissions from flowing into the second battery cavity 1012. If the second battery cell 410 in the second battery cavity 1012 experiences thermal runaway and generates emissions, the partition structure 30 can also prevent the emissions from flowing into the first battery cavity 1011.

[0426] By adopting the above technical solution, the first battery pack 300 is disposed in the first battery cavity 1011, and the second battery pack 400 is disposed in the second battery cavity 1012. A partition structure 30 capable of blocking at least part of the emissions is provided between the first battery cavity 1011 and the second battery cavity 1012. Thus, in the event of thermal runaway in either the first battery pack 300 or the second battery pack 400, The partition structure 30 can prevent emissions from flowing into the other of the first battery pack 300 and the second battery pack 400, thereby allowing the other battery pack to operate normally and provide power to the electrical device. Mechanically, this improves the feasibility of a redundant power supply system and enhances the operational reliability of the battery device 1100. Simultaneously, because the partition structure 30 is provided between the first battery cavity 1011 accommodating the first battery cell 310 and the second battery cavity 1012 accommodating the second battery cell 410, the risk of thermal runaway of the entire battery device 1100 due to thermal runaway of the battery cell 1002 is effectively reduced, and the risk of thermal runaway propagation is also reduced.

[0427] In some embodiments, the partition structure 30 is configured to seal and isolate the first battery cavity 1011 and the second battery cavity 1012.

[0428] If the separation structure 30 can seal and isolate the first battery cavity 1011 and the second battery cavity 1012, then the separation structure 30 can completely block the emissions, including particles and gases, generated after the thermal runaway of the battery cell 1002.

[0429] Optionally, the partition structure 30 includes a partition beam that is sealed to the inner wall of the housing 100 to seal and isolate the first battery cavity 1011 and the second battery cavity 1012.

[0430] Optionally, at least one end of the partition beam along its extension direction is welded to the inner wall of the box 100, which provides better sealing performance.

[0431] By adopting the above technical solution, the partition structure 30 can seal and isolate the first battery cavity 1011 and the second battery cavity 1012, so that there is no gas flow between the first battery cavity 1011 and the second battery cavity 1012. The emissions generated after thermal runaway of one of the first battery cells 310 and the second battery cells 410 will not be discharged into the cavity space of the other. This further reduces the risk of thermal runaway propagation between the first battery pack 300 and the second battery pack 400, making the first battery pack 300 and the second battery pack 400 isolated from each other and not affecting each other. After the failure of the first battery pack 300, the second battery pack 400 can still supply power to the load 900, thereby improving the feasibility of redundant power supply.

[0432] In some embodiments, the housing 100 includes a tray 10 and a cover 20, the cover 20 and the tray 10 are disposed opposite each other along a first direction, and the cover 20 covers the tray 10; the partition structure 30 divides the housing 100 into a first battery cavity 1011 and a second battery cavity 1012, and the partition structure 30 is connected to the cover 20 and the tray 10 on opposite sides along the first direction, respectively.

[0433] The tray 10 and the cover 20 are arranged opposite each other along a first direction and together enclose the receiving space of the box 100. The first direction is the height direction of the box 100. One end of the tray 10 has an opening, and the cover 20 covers the tray 10 and closes the opening of the tray 10. Optionally, the tray 10 includes a base plate and a frame. The base plate and the cover 20 are arranged opposite each other along the first direction, and both ends of the frame are respectively connected to the base plate and the cover 20. The base plate and the frame can be an integral structure or separate structures that are fixedly connected.

[0434] The cover 20 can be a plate or a box with one end open. When the battery device 1100 is installed in the electrical device, the cover 20 can be a top cover located above the tray 10 or a bottom cover located below the tray 10.

[0435] A partition structure 30 is disposed within the housing 100 and serves to divide the housing 100 into a first battery cavity 1011 and a second battery cavity 1012. The partition structure 30 enables the first battery cavity 1011 to be fully or partially sealed. The partition structure 30 is connected to the cover 20 and the tray 10 on opposite sides along a first direction, for example, as shown below. Figure 23 and Figure 24 As shown, the partition structure 30 includes a partition beam extending along the length of the housing 100. The two ends of the partition beam along the first direction are connected to the cover 20 and the tray 10, respectively, and the two ends along its extension direction are connected to the inner wall of the tray 10. Thus, the partition beam can divide the housing 100 into a first battery cavity 1011 and a second battery cavity 1012 arranged along its width direction. It is understood that the partition structure 30 can also be other structures. For example, the partition structure 30 divides the housing 100 into a first battery cavity 1011 and a second battery cavity 1012 arranged along its length direction; or, for example, the partition structure 30 divides the housing 100 into a first battery cavity 1011 and a second battery cavity 1012 arranged along the first direction.

[0436] By adopting the above technical solution, the partition structure 30 can connect the cover 20 and the tray 10, and divide the space inside the box 100 into the first battery cavity 1011 and the second battery cavity 1012. The partition structure 30 simultaneously plays the role of spatial isolation and blocking emissions, and has a simple structure.

[0437] In some embodiments, the cover 20 seals the first battery cavity 1011 and the second battery cavity 1012. The housing 100 also includes a sealing element 40, and the sealing element 40 is provided between the partition structure 30 and the cover 20 and between the cover 20 and the tray 10.

[0438] The space inside the tray 10 can accommodate the first battery pack 300 and the second battery pack 400, and the cover 20 is sealed on the tray 10, so that the cover 20 can seal the first battery cavity 1011 and the second battery cavity 1012.

[0439] The enclosure 100 also includes a sealing element 40, which is a structural component used for sealing. The sealing element 40 can be a gasket, sealing sheet, sealant, etc., and the material of the sealing element 40 can be silicone, rubber, foam, or composite material. The sealing element 40 can seal the gap between the partition structure 30 and the enclosure 100.

[0440] For example, a sealing element 40 is provided between the partition structure 30 and the cover 20, so that the sealing element 40 can seal the gap between the partition structure 30 and the cover 20. For example, the partition structure 30 is a partition beam fixedly provided in the tray 10, and the partition structure 30 and the tray 10 can be integrally formed, then the sealing element 40 only needs to be provided between the partition structure 30 and the cover 20.

[0441] For example, a seal 40 is provided between the partition structure 30 and the tray 10, so that the seal 40 can seal the gap between the partition structure 30 and the tray 10.

[0442] In some embodiments, a sealing element 40 is provided between the cover 20 and the tray 10, which can seal the gap between the cover 20 and the tray 10, so that the sealing performance between the cover 20 and the tray 10 is better.

[0443] like Figure 23 As shown, in some embodiments, the seal 40 is an integral structure including a sealing frame and a sealing strip disposed within the sealing frame. The sealing frame is located between the cover 20 and the tray 10, and the sealing strip is located on one side of the partition structure 30 along the first direction. This not only provides a good sealing effect but also facilitates assembly. It is understood that multiple seals 40 can also be separately installed.

[0444] By setting the seal 40, the sealing effect between the partition structure 30 and the cover 20 and / or tray 10 can be improved, thereby improving the sealing and isolation effect between the first battery cavity 1011 and the second battery cavity 1012, reducing the risk of emissions flowing between different cavities and the risk of thermal runaway propagation.

[0445] Please refer to Figure 23 , Figure 24 and Figure 37B In some embodiments, the cover 20 includes a first cover 21 and a second cover 22, the first cover 21 sealing the first battery cavity 1011 and the second cover 22 sealing the second battery cavity 1012.

[0446] The first cover 21 and the second cover 22 can be an integral structure or a separate structure.

[0447] like Figure 23 As shown, the first cover 21 and the second cover 22 are an integral structure. A part of the cover 20 is the first cover 21, which is provided corresponding to the first battery cavity 1011 and seals the first battery cavity 1011. The other part of the cover 20 is the second cover 22, which is provided corresponding to the second battery cavity 1012 and seals the second battery cavity 1012.

[0448] like Figure 37B As shown, in another embodiment, the cover 20 includes a first cover 21 and a second cover 22, the orthographic projection of the first cover 21 toward the second cover 22 falling inside the second cover 22. It can be understood that, as shown... Figure 37A The battery cavity 101 corresponding to the provided cover 20 includes a first battery cavity 1011 and a second battery cavity 1012 surrounding the outer periphery of the first battery cavity 1011.

[0449] Optionally, the first cover 21 and the second cover 22 are arranged on the same layer. In this case, the first cover 21 and the second cover 22 are different sections of a cover 20, or the first cover 21 and the second cover 22 are two independent components and are respectively locked onto the tray 10.

[0450] Optionally, the first cover 21 and the second cover 22 can also be stacked. For example, the first cover 21 is located inside the second cover 22, the edge of the second cover 22 is fixedly connected to the tray 10 to form an accommodating space, the first cover 21 is located on the side of the second cover 22 facing the tray 10, the first cover 21 seals the first battery cavity 1011, and the second cover 22 seals the second battery cavity 1012.

[0451] By adopting the above technical solution, the cover 20 includes a first cover 21 that seals the first battery cavity 1011 and a second cover 22 that seals the second battery cavity 1012. The cover 20 can work with the partition structure 30 to separate and seal the first battery cavity 1011 and the second battery cavity 1012, and the sealing and isolation effect is good.

[0452] Please refer to Figures 25 to 28 In some embodiments, the housing 100 is further provided with an electrical cavity 102 for accommodating electrical components 200. At least some of the electrical components 200 are electrically connected to a first main terminal 320 and an output interface 700, and at least some of the electrical components 200 are electrically connected to a second main terminal 420 and an output interface 700. The output interface 700 passes through the cavity wall of the electrical cavity 102.

[0453] The housing 100 contains a battery compartment 101 and an electrical compartment 102, the electrical compartment 102 being used to house electrical components 200. In some embodiments, such as Figures 26 to 28 As shown, the electrical cavity 102 is disposed within the receiving space enclosed by the tray 10 and the cover 20. In other embodiments, such as Figure 25 As shown, the electrical cavity 102 may be formed on one side of the tray 10, for example, the electrical cavity 102 may be formed inside the electrical box outside the tray 10 and the cover 20.

[0454] The housing 100 has an output interface 700, the first battery pack 300 has a first main terminal 320, and the second battery pack 400 has a second main terminal 420. At least some electrical components 200 are electrically connected to the first main terminal 320 and the output interface 700, enabling the first battery pack 300 to supply power to the load 900 through the output interface 700. Simultaneously, at least some electrical components 200 are electrically connected to the second main terminal 420 and the output interface 700, enabling the second battery pack 400 to supply power to the load 900 through the output interface 700. The output interface 700 passes through the cavity wall of the electrical cavity 102 for easy connection to the load 900. Optionally, the output interface 700 may pass through the top wall, bottom wall, or side wall of the battery cavity 101.

[0455] By adopting the above technical solution, the housing 100 is provided with an electrical cavity 102. The electrical components 200 in the electrical cavity 102 can electrically connect the first main terminal 320 to the output interface 700 and the second main terminal 420 to the output interface 700, so that the first battery pack 300 and the second battery pack 400 can respectively supply power to the load 900. The output interface 700 passes through the cavity wall of the electrical cavity 102 to facilitate connection to the load 900. At the same time, since the electrical components 200 are located in the electrical cavity 102, if one of the first battery pack 300 and the second battery pack 400 experiences thermal runaway, the other can still be connected to the output interface 700 through the electrical components 200, thereby improving the reliability of the electrical components 200 and the battery device 1100 as a whole.

[0456] In some embodiments, the load 900 includes a first load 910, and the output interface 700 includes a first output interface 710 for connecting a power supply circuit to the first load 910; the electrical component 200 includes a first voltage conversion module 220, and at least one of a first main terminal 320 and a second main terminal 420 is electrically connected to the first output interface 710 through the first voltage conversion module 220 to provide a first voltage to the first load 910, the first voltage range being greater than or equal to 150V.

[0457] By adopting the technical solution of this embodiment, the first voltage conversion module 220 is disposed in the electrical cavity 102. The first voltage conversion module 220 and the electrical components 200 in the electrical cavity 102 are highly integrated, occupying a small space. The first voltage conversion module 220 is placed in the electrical cavity 102, and the electrical cavity 102 is in a sealed state. It is sufficient to place the first voltage conversion module 220 in the electrical cavity 102 without additional sealing of the first voltage conversion module 220. That is, the first voltage conversion module 220 does not need to be sealed separately. In addition, it is not easily affected by the thermal runaway of the battery pack 1001.

[0458] In some embodiments, the load 900 includes a second load 920, and the output interface 700 includes a second output interface 720 for accessing a power supply circuit of the second load 920; the electrical component 200 includes a second voltage conversion module 230, and at least one of the second main terminal 420 and the second main terminal 420 is electrically connected to the second output interface 720 through the second voltage conversion module 230 to provide a second voltage to the second load 920, the second voltage being less than or equal to 60V.

[0459] By adopting the technical solution of this embodiment, the second voltage conversion module 230 and the electrical components 200 in the electrical cavity 102 are highly integrated, occupying a small space. The second voltage conversion module 230 does not need to be sealed separately when placed in the electrical cavity 102. In addition, it is not easily affected by the thermal runaway of the battery pack 1001.

[0460] In some embodiments, the load 900 includes a first load 910, and the output interface 700 includes a first output interface 710 for connecting to a power supply circuit of the first load 910; the electrical component 200 includes a first voltage conversion module 220, at least one of a first main terminal 320 and a second main terminal 420 being electrically connected to the first output interface 710 through the first voltage conversion module 220 to provide a first voltage to the first load 910, the first voltage being greater than or equal to 150V; the load 900 includes a second load 920, and the output interface 700 includes a second output interface 720 for connecting to a power supply circuit of the second load 920; the electrical component 200 includes a second voltage conversion module 230, at least one of a second main terminal 420 and a second main terminal 420 being electrically connected to the second output interface 720 through the second voltage conversion module 230 to provide a second voltage to the second load 920, the second voltage being less than or equal to 60V.

[0461] By adopting the technical solution of this embodiment, the first voltage conversion module 220 and the second voltage conversion module 230 and the electrical components 200 in the electrical cavity 102 are highly integrated, occupying a small volume. The first voltage conversion module 220 and the second voltage conversion module 230 do not need to be sealed separately when placed in the electrical cavity 102. In addition, they are not easily affected by the thermal runaway of the battery pack 1001.

[0462] Please continue to refer to Figures 26 to 28In some embodiments, the housing 100 is provided with an electrical cavity partition 50, which is used to seal and isolate the electrical cavity 102 from the first battery cavity 1011 and / or the second battery cavity 1012. The electrical cavity partition 50 is provided with a mounting hole. The battery device 1100 also includes an adapter 51, which is sealed through the mounting hole. One end of the adapter 51 is electrically connected to at least one of the first main terminal 320 and the second main terminal 420, and the other end of the adapter 51 is electrically connected to the electrical component 200 in the electrical cavity 102.

[0463] like Figures 26 to 28 As shown, in some embodiments, the electrical cavity separator 50 seals and isolates the electrical cavity 102 from the first battery cavity 1011, and also seals and isolates the electrical cavity 102 from the second battery cavity 1012. It can be understood that the electrical cavity separator 50 may also seal and isolate one of the first battery cavity 1011 and the second battery cavity 1012 from the electrical cavity 102, while the other may be connected to or partially sealed and isolated from the electrical cavity 102. For example, if the thermal runaway risk of the first battery pack 300 is higher than that of the second battery pack 400, then the electrical cavity separator 50 seals and isolates the first battery cavity 1011 from the electrical cavity 102.

[0464] The electrical cavity partition 50 is a partition that can provide a sealing and isolation function. Optionally, the electrical cavity partition 50 may include structures such as partition beams, partition plates, and sealing strips.

[0465] by Figure 26 For example, in some embodiments, the electrical cavity 102 and the battery cavity 101 are located on the same layer of the housing 100, and the electrical cavity partition 50 is a partition beam structure. Optionally, the first battery cavity 1011 and the second battery cavity 1012 are arranged along the length direction of the housing 100, while the electrical cavity 102 and the battery cavity 101 are arranged along the width direction of the housing 100, so that the partition structure 30 intersects the electrical cavity partition 50 perpendicularly. It can be understood that the structure of the electrical cavity partition 50 can be set according to the structure and position of the electrical cavity 102. Please refer to... Figure 29 In some other embodiments, the electrical cavity 102 is arranged in two layers with the first battery cavity 1011 and the second battery cavity 1012. Optionally, the first battery cavity 1011 and the second battery cavity 1012 are located on one layer, and the electrical cavity 102 is located on another layer. In this case, the electrical cavity separator 50 is a separator plate.

[0466] The adapter 51 is a conductive adapter element. The electrical cavity separator 50 has a mounting hole, which is a through hole. The adapter 51 is sealed and inserted through the mounting hole. Optionally, the adapter 51 is provided with a sealing component. The adapter 51 is inserted through the mounting hole, and the gap between the mounting hole and the adapter 51 is sealed by the sealing component.

[0467] Optionally, the first battery cavity 1011 is sealed and isolated from the electrical cavity 102. The two ends of the adapter 51 are located in the first battery cavity 1011 and the electrical cavity 102, respectively. One end of the adapter 51 is electrically connected to the first main terminal 320, and the other end is electrically connected to the electrical component 200 in the electrical cavity 102, so that the first battery pack 300 is electrically connected to the output interface 700 through the first main terminal 320 and the electrical component 200.

[0468] Optionally, the second battery cavity 1012 is sealed and isolated from the electrical cavity 102. The two ends of the adapter 51 are located in the second battery cavity 1012 and the electrical cavity 102, respectively. One end of the adapter 51 is electrically connected to the second main terminal 420, and the other end is electrically connected to the electrical component 200 in the electrical cavity 102, so that the second battery pack 400 is electrically connected to the output interface 700 through the second main terminal 420 and the electrical component 200.

[0469] By adopting the above technical solution, the electrical cavity 102 is sealed and isolated from the first battery cavity 1011 and / or the second battery cavity 1012, so that the emissions generated after the thermal runaway of the first battery cell 310 and / or the second battery cell 410 are not easily discharged into the electrical cavity 102, making the electrical component 200 less susceptible to the thermal runaway of the battery cell 1002. If one of the first battery pack 300 and the second battery pack 400 experiences thermal runaway, the other can still be electrically connected to the output interface 700 through the electrical component 200 in the electrical cavity 102, so that the battery device 1100 can still supply power to the load 900, thereby improving the reliability of the battery device 1100 in achieving redundant power supply.

[0470] In some embodiments, the electrical cavity 102, the first battery cavity 1011, and the second battery cavity 1012 are arranged in the same layer, or the electrical cavity 102 and at least one of the first battery cavity 1011 and the second battery cavity 1012 are arranged in two layers.

[0471] like Figures 25 to 28 As shown, the electrical cavity 102, the first battery cavity 1011, and the second battery cavity 1012 are arranged on the same layer. Optionally, the electrical cavity 102 is located on the same side of the first battery cavity 1011 and the second battery cavity 1012; it is understood that there can also be multiple electrical cavities 102, and the multiple electrical cavities 102 can be located on different sides of the first battery cavity 1011 and the second battery cavity 1012 respectively.

[0472] like Figure 29As shown, the first battery cavity 1011 and the second battery cavity 1012 are located on one layer, and the electrical cavity 102 is located on another layer. Optionally, the cover 20 has a protruding structure facing away from the tray 10, and the electrical cavity 102 is located inside the protruding structure. In another embodiment, one of the first battery cavity 1011 and the second battery cavity 1012 may be located on one layer, and the other and the electrical cavity 102 may be located on another layer; or, the battery cavity 101 may be divided into two layers, and the electrical cavity 102 may be located in one of the layers.

[0473] By adopting the above technical solution, the battery device 1100 can flexibly arrange the position of the electrical cavity 102, which is conducive to the convenient connection of the first battery pack 300 and the second battery pack 400 to the electrical component 200 and the output interface 700.

[0474] Please refer to Figures 26 to 28 In some embodiments, the first battery cavity 1011 and the second battery cavity 1012 are sealed and isolated from each other, and both the first battery cavity 1011 and the second battery cavity 1012 are sealed and isolated from the electrical cavity 102. The first battery cavity 1011, the second battery cavity 1012 and the electrical cavity 102 are respectively provided with a pressure balancing mechanism, and the first battery cavity 1011 and the second battery cavity 1012 are respectively provided with a pressure relief mechanism.

[0475] Any two of the first battery chamber 1011, the second battery chamber 1012, and the electrical chamber 102 are sealed and isolated, further reducing the risk of thermal runaway propagation and improving the reliability of the battery device 1100.

[0476] A pressure balancing mechanism is a device used to balance the air pressure inside and outside a cavity. Its main function is to prevent cavity sealing failure, internal pressure buildup, or intrusion of external contaminants caused by pressure differences. Pressure balancing mechanisms can be structured as waterproof and breathable valves, pressure-balanced humidity control valves, or pressure-balancing valves.

[0477] By providing air pressure balancing mechanisms in the first battery cavity 1011, the second battery cavity 1012, and the electrical cavity 102 respectively, the air pressure inside and outside the first battery cavity 1011, the second battery cavity 1012, and the electrical cavity 102 can be kept in balance. By providing pressure relief mechanisms 61 in the first battery cavity 1011 and the second battery cavity 1012 respectively, the first battery cavity 1011 and the second battery cavity 1012 can be depressurized independently.

[0478] Please refer to Figures 23 to 40 In some embodiments, the number of first battery cavity 1011 and second battery cavity 1012 can be one or more, wherein the arrangement of the first battery cavity 1011 and the second battery cavity 1012 includes one or more of the following: Arrangement method 1: The first battery cavity 1011 and the second battery cavity 1012 are arranged along the length of the housing 100; Arrangement method two: The first battery cavity 1011 and the second battery cavity 1012 are arranged along the width direction of the housing 100; Arrangement method three: The first battery cavity 1011 and the second battery cavity 1012 are arranged along the height direction of the box body 100; Arrangement method four: One of the first battery cavity 1011 and the second battery cavity 1012 is located at one corner of the housing 100; Arrangement method five: Several first battery cavities 1011 and several second battery cavities 1012 are arranged alternately.

[0479] The number of first battery cavities 1011 and second battery cavities 1012 can be one or more. If there are multiple first battery cavities 1011, each first battery cavity 1011 is used to accommodate a first battery pack 300, or each first battery cavity 1011 accommodates a plurality of first battery cells 310 in the first battery pack 300. If there are multiple second battery cavities 1012, each second battery cavity 1012 is used to accommodate a second battery pack 400, or each second cavity accommodates a plurality of second battery cells 410 in the second battery pack.

[0480] The length direction of the housing 100 is the direction of its longest side, the width direction is the direction of its second longest side, and the height direction is the direction of its shortest side. For example, if the housing 100 includes a tray 10 and a cover 20 arranged opposite each other along a first direction, then the first direction is the height direction of the housing 100. If the battery device 1100 can be used in the vehicle 1000, then the length direction of the housing 100 can be, but is not limited to, the front-rear direction of the vehicle 1000. If the cross-section of the housing 100 is approximately square, then the length, width, and height directions of the housing 100 can be defined according to the placement of the battery device 1100, etc.

[0481] Please refer to Figure 23 and Figure 40 In (a), the first battery cavity 1011 and the second battery cavity 1012 are arranged along the width direction of the housing 100; please refer to Figure 28 and Figure 40 (b) The first battery cavity 1011 and the second battery cavity 1012 are arranged along the length of the housing 100; please refer to Figure 40 (c) The first battery cavity 1011 is located at one corner of the housing 100, and the second battery cavity 1012 is located in the remaining part of the battery cavity 101; please refer to Figure 40(d) Along the length of the housing 100, a first battery cavity 1011, a second battery cavity 1012, and another first battery cavity 1011 are arranged alternately. Each of the two first battery cavities 1011 can accommodate a portion of the first battery cells 310 in the first battery pack 300, or each of the two first battery cavities 1011 can accommodate one first battery pack 300; or, please refer to... Figure 40 In (d), the first battery cavity 1011, the second battery cavity 1012, and the third battery cavity 1011 (or the third battery cavity 101) are arranged sequentially. The third battery cavity 101 is used to accommodate the third battery pack 500, which includes multiple third battery cells 1002. Of course, the arrangement of the first battery cavity 1011 and the second battery cavity 1012 can also include various of the above-mentioned arrangements.

[0482] The battery cavity 101 can also be divided into two or more sub-cavities, and multiple sub-cavities can be arranged along the length / width / height direction of the housing 100. For example, please refer to... Figure 42 and Figure 43 The battery cavity 101 is divided into a first battery cavity 1011, a second battery cavity 1012, a third battery cavity and a fourth battery cavity, or the battery cavity 101 is divided into two first battery cavities 1011 and two second battery cavities 1012.

[0483] In the battery device 1100 provided in this application embodiment, the arrangement of the first battery cavity 1011 and the second battery cavity 1012 can be varied, with high flexibility. Specifically, it can be set according to the applicable scenario, the system of the battery cell 1002, and other requirements to meet various usage needs.

[0484] In addition, the arrangement of the first battery cell 310 in the first battery cavity 1011 and the arrangement of the second battery cell 410 in the second battery cavity 1012 can be varied and can be combined with the arrangement of the first battery cavity 1011 and the second battery cavity 1012 to meet various usage requirements.

[0485] Please refer to Figures 23 to 30 , Figure 40 and Figure 41 In some embodiments, within the first battery cavity 1011, a plurality of first battery cells 310 are arranged along the length and / or width and / or height of the housing 100; within the second battery cavity 1012, a plurality of first battery cells 310 are arranged along the length and / or width and / or height of the housing 100.

[0486] like Figure 24 and Figure 41As shown in (a) and (d), within the first battery cavity 1011, a plurality of first battery cells 310 are arranged along the length and width directions of the housing 100. For example, the plurality of first battery cells 310 are arranged in four columns along the width direction of the housing 100 and in multiple rows along the length direction of the housing 100. Within the second battery cavity 1012, a plurality of second battery cells 410 are arranged along the length and width directions of the housing 100. For example, the plurality of second battery cells 410 are arranged in four columns along the width direction of the housing 100 and in multiple rows along the length direction of the housing 100. It is understood that the number of first battery cells 310 and second battery cells 410 may be the same or different, and the number of rows and / or columns of the first battery cells 310 and second battery cells 410 may also be the same or different.

[0487] like Figure 41 As shown in (c), the long side of the first battery cell 310 is aligned with the width of the first battery cavity 1011. Within the first battery cavity 1011, multiple first battery cells 310 are arranged in a row along the length or width of the housing 100. The first battery cell 310 may be, but is not limited to, a blade battery. Alternatively, within the second battery cavity 1012, multiple second battery cells 410 are arranged in a row along the length or width of the housing 100. The second battery cells 410 may be, but is not limited to, a blade battery.

[0488] like Figure 41 As shown in (b), the long side of the first battery cell 310 is aligned with the length direction of the first battery cavity 1011. Within the first battery cavity 1011, multiple first battery cells 310 are arranged in four rows along the length of the first battery cavity 1011 and in multiple columns along the width direction of the first battery cavity 1011. Alternatively, within the second battery cavity 1012, multiple second battery cells 410 are arranged in four rows along the length of the first battery cavity 1011 and in multiple columns along the width direction of the second battery cavity 1012.

[0489] It should be noted that, in any arrangement, the first battery cell 310 and / or the second battery cell 410 can be upright, inverted, or flat within the housing 100. Upright means that the terminals of the battery cell 1002 are arranged vertically upwards, inverted means that the terminals of the battery cell 1002 are arranged vertically downwards, and flat means that the terminals of the battery cell 1002 are arranged with their horizontal orientation.

[0490] In the battery device 1100 provided in this application embodiment, the arrangement of the first battery cell 310 and the second battery cell 410 in the battery cavity 101 can be varied, with high flexibility. Specifically, it can be set according to the applicable cavity space, scenario, battery cell 1002 system, energy density and other requirements to meet various usage needs.

[0491] Please refer to Figures 29 to 31In some embodiments, the housing 100 is provided with at least one pressure relief mechanism 61, and the housing 100 is provided with a pressure relief chamber 12. The pressure relief mechanism 61 is connected to the pressure relief chamber 12. The first battery chamber 1011 can be connected to the pressure relief chamber 12 when the first battery pack 300 experiences thermal runaway. The second battery chamber 1012 can be connected to the pressure relief chamber 12 when the second battery pack 400 experiences thermal runaway.

[0492] The pressure relief mechanism 61 on the housing 100 can release the pressure inside the housing 100 when actuated. The pressure relief mechanism 61 can be in the form of an explosion-proof valve, a gas valve, a pressure relief valve or a safety valve, and can specifically adopt a pressure-sensitive element or structure. When the pressure relief mechanism 61 performs an action or a weak part provided in the pressure relief mechanism 61 breaks, an opening or channel for internal pressure to be released is formed.

[0493] "Actuation" of the pressure relief mechanism 61 means that the pressure relief mechanism 61 is activated or moved to a certain state, thereby releasing the internal pressure of the housing 100. The actions of the pressure relief mechanism 61 may include, but are not limited to: at least a part of the pressure relief mechanism 61 breaking, fracturing, tearing, or opening, etc.

[0494] The housing 100 is provided with one or more pressure relief mechanisms 61, such as Figures 30 to 31 As shown, in some embodiments, the housing 100 is provided with at least one pressure relief mechanism 61, and the housing 100 is provided with a pressure relief chamber 12, with the pressure relief mechanism 61 connected to the pressure relief chamber 12. If the first battery pack 300 experiences thermal runaway, the first battery chamber 1011 can connect to the pressure relief chamber 12 and, under preset conditions, relieve pressure through the pressure relief mechanism 61; if the second battery pack 400 experiences thermal runaway, the second battery chamber 1012 can connect to the pressure relief chamber 12 and, under preset conditions, relieve pressure through the pressure relief mechanism 61.

[0495] By adopting the above technical solution, and by setting up the pressure relief chamber 12, a pressure relief space is formed on the housing 100. Both the first battery pack 300 and the second battery pack 400 can release pressure to the outside of the housing 100 through the pressure relief chamber 12 and the pressure relief mechanism 61, thereby reducing the impact of thermal runaway of one battery pack 1001 on the other battery pack 1001. Furthermore, the first battery pack 300 and the second battery pack 400 can share a pressure relief chamber 12 and the pressure relief mechanism 61, reducing the cost of the pressure relief mechanism 61.

[0496] Please refer to Figure 30 , Figure 31 In some embodiments, the housing 100 includes a side beam 11, and the hollow cavity inside the side beam 11 forms a pressure relief chamber 12; the pressure relief chamber 12 is provided with a vent corresponding to the battery chamber 101, and each vent is provided with a sealing structure, which can be actuated under preset conditions to connect the battery chamber 101 and the pressure relief chamber 12.

[0497] The housing 100 includes a plurality of side beams 11 connected in sequence. The plurality of side beams 11 together define the accommodating space of the housing 100. At least one side beam 11 is a hollow beam. The hollow cavity inside the side beam 11 forms a pressure relief cavity 12. The pressure relief cavity 12 is provided with a vent corresponding to the first battery cavity 1011 and another vent corresponding to the second battery cavity 1012.

[0498] Each vent is equipped with a sealing structure. Before the battery cell 1002 experiences thermal runaway, the sealing structure blocks the vent. If the battery cell 1002 experiences thermal runaway, the sealing structure can be activated to connect the battery chamber 101 and the pressure relief chamber 12 as the internal pressure or temperature increases. The sealing structure can be a one-way valve, a gas valve, or other components, or it can be a component or weak point that opens when heated or ruptures under pressure.

[0499] If the first battery pack 300 experiences thermal runaway, the sealing structure corresponding to the first battery cavity 1011 is activated. The emissions from the first battery pack 300 are discharged through the vent to the pressure relief cavity 12 and can also be discharged to the outside of the battery device 1100 through the pressure relief mechanism 61. The sealing structure corresponding to the second battery cavity 1012 is not activated, and the emissions in the pressure relief cavity 12 will not be discharged to the second battery cavity 1012. Therefore, the thermal runaway of the first battery pack 300 is unlikely to affect the second battery pack 400. Similarly, if the second battery pack 400 experiences thermal runaway, it is unlikely to affect the first battery pack 300. Optionally, the actuation pressure of the sealing structure is greater than the actuation pressure of the pressure relief mechanism 61.

[0500] By adopting the above technical solution, the pressure relief chamber 12 is located in the hollow cavity of the side beam 11 and does not occupy the space of the battery chamber 101; the sealing structure can block or open the vent on the pressure relief chamber 12, so that the first battery chamber 1011 and / or the second battery chamber 1012 can be depressurized in time without affecting other battery cells 1002, thereby improving the reliability of the battery device 1100.

[0501] Please refer to Figure 24 Figure 29 , Figure 31 In some embodiments, the housing 100 is provided with a first pressure relief mechanism 62 and a second pressure relief mechanism 63, the first battery cavity 1011 is correspondingly provided with the first pressure relief mechanism 62, and the second battery cavity 1012 is correspondingly provided with the second pressure relief mechanism 63.

[0502] The first battery chamber 1011 is correspondingly arranged with the first pressure relief mechanism 62, so that the discharge in the first battery chamber 1011 can be discharged to the outside of the housing 100 through the first pressure relief mechanism 62. The second battery chamber 1012 is correspondingly arranged with the second pressure relief mechanism 63, so that the discharge in the first battery chamber 1011 can be discharged to the outside of the housing 100 through the second pressure relief mechanism 63.

[0503] Since the first battery chamber 1011 and the second battery chamber 1012 are isolated, by setting a first pressure relief mechanism 62 corresponding to the first battery chamber 1011 and a second pressure relief mechanism 63 corresponding to the second battery chamber 1012, the first battery pack 300 and the second battery pack 400 can be pressured independently, and are less likely to affect each other, thereby improving the reliability of the battery device 1100.

[0504] It is understood that there are more than two pressure relief mechanisms 61. For example, if the housing 100 has a sealed and isolated first battery chamber 1011, second battery chamber 1012 and third battery chamber 101, then there can be three pressure relief mechanisms 61.

[0505] Please refer to Figures 26 to 36 In some embodiments, the battery device 1100 further includes a thermal management component 70 for thermal management of the first battery pack 300 and / or the second battery pack 400.

[0506] When an electrochemical reaction occurs inside the battery cell 1002, heat is generated. With repeated use of the battery, the battery cell 1002 continuously generates heat, causing the internal temperature of the battery device 1100 to gradually rise, affecting the performance of the battery device 1100. The thermal management component 70 is used to regulate the temperature of the battery cell 1002, including cooling the battery cell 1002 or heating it in low-temperature environments to bring it to its normal operating temperature range.

[0507] The thermal management component 70 has a heat exchange channel for the flow of a heat exchange medium, which can be a fluid (liquid) or a gas. Temperature regulation refers to heating or cooling multiple battery cells 1002. Optionally, the fluid can be circulating to achieve better temperature regulation. Optionally, the fluid can be water, a mixture of water and ethylene glycol, or air, etc. For example, when cooling or lowering the temperature of the battery cells 1002, the thermal management component 70 is used to contain cooling fluid to lower the temperature of multiple battery cells 1002. In this case, the thermal management component 70 can also be called a cooling component, cooling system, or cooling plate, etc., and the fluid it contains can also be called a cooling medium or cooling fluid, more specifically, a coolant or a cooling gas. When the fluid contained in the thermal management component 70 is a coolant, the thermal management component 70 can also be called a liquid cooling plate. The liquid cooling plate contacts the battery cells 1002 and can be used to lower the temperature of the battery cells 1002 to prevent thermal runaway of the battery cells 1002.

[0508] In this embodiment, the thermal management component 70 can perform thermal management on at least one of the first battery pack 300 and the second battery pack 400, so that the first battery pack 300 and / or the second battery pack 400 can operate within the optimal operating range, thereby improving the stability and reliability of the battery device 1100 and extending the service life of the battery device 1100.

[0509] In some embodiments, the battery cell 1002 systems of the first battery pack 300 and the second battery pack 400 are different. The first battery pack 300 is suitable for charging and discharging under low temperature conditions, while the second battery pack 400 is suitable for charging and discharging under high temperature conditions. This allows the first battery pack 300 to be equipped with a thermal management component 70 for heat exchange, and the second battery pack 400 to be naturally heated, thereby adapting to different battery cell 1002 systems.

[0510] In some embodiments, the first battery pack 300 is arranged near the wall of the battery housing 100, forming an arrangement that surrounds the second battery pack 400. In this arrangement, the first battery pack 300 is located at the edge, which results in good heat exchange conditions for the first battery pack 300, while the second battery pack 400 is located in the middle, which results in poor heat exchange conditions for the second battery pack 400. This allows the first battery pack 300 to undergo natural heat exchange, while the second battery pack 400 is equipped with a thermal management component 70 for heat exchange, thereby adapting to different arrangement schemes.

[0511] In some embodiments, the thermal management component 70 includes at least a first sub-thermal management component 71 and a second sub-thermal management component 72, wherein the first sub-thermal management component 71 is used to perform thermal management on the first battery pack 300 and the second sub-thermal management component 72 is used to perform thermal management on the second battery pack 400.

[0512] The first sub-thermal management component 71 is correspondingly disposed with the first battery pack 300, and the second sub-thermal management component 72 is correspondingly disposed with the second battery pack 400. In some embodiments, the battery cavity 101 includes a first battery cavity 1011 and a second battery cavity 1012, then the first sub-thermal management component 71 is correspondingly disposed with the first battery cavity 1011, and the second sub-thermal management component 72 is correspondingly disposed with the second battery cavity 1012.

[0513] In some other embodiments, the first battery cell 310 and the second battery cell 410 are not isolated, in which case the first sub-thermal management component 71 corresponds to the first battery cell 310 and the second sub-thermal management component 72 corresponds to the second battery cell 410.

[0514] The first sub-thermal management component 71 and the second sub-thermal management component 72 may be of the same or different types.

[0515] For example, such as Figure 32As shown, the first thermal management component 70 and the second sub-thermal management component 72 are both thermal management components 70 used to exchange heat on the large surface of the battery cell 1002. The first thermal management component 70 includes a first heat exchange tube 711 and a first current collector 712, and the second thermal management component 70 includes a second heat exchange tube 721 and a second current collector 722.

[0516] like Figure 33 As shown, the heat exchange areas of the first thermal management component 70 and the second sub-thermal management component 72 are different. For example, the first heat exchange tube 711 in the first thermal management component 70 is relatively sparse, and a single large surface of the first battery cell 310 exchanges heat with the first heat exchange tube 711; the second heat exchange tube 721 in the second thermal management component 70 is relatively dense, and both large surfaces of the second battery cell 410 exchange heat with the second heat exchange tube 721. The aforementioned "large surface" refers to the surface with the largest area in the battery cell 1002.

[0517] like Figure 34 As shown, the first thermal management component 70 is a heat exchange plate that cools the bottom of the battery cell 1002, and the second thermal management component 70 is a thermal management component 70 that exchanges heat on the large surface of the battery cell 1002, which includes multiple second heat exchange tubes 721 and second current collectors 722.

[0518] In addition, the first thermal management component 70 and / or the second sub-thermal management component 72 may also be thermal management components 70 that exchange heat on the shoulder of the battery cell 1002.

[0519] By adopting the above technical solution, the first battery pack 300 and the second battery pack 400 are respectively thermally managed through corresponding sub-thermal management components 70. The structures of the first thermal management component 70 and the second sub-thermal management component 72 can be flexibly configured to adapt to the heat exchange requirements of the battery pack 1001. Furthermore, if one sub-thermal management component 70 fails due to blockage or other reasons, the other sub-thermal management component 70 can still operate normally, improving the overall thermal management reliability of the battery device 1100. Configuring independent thermal management components for the first battery pack 300 and the second battery pack 400 forms a redundant configuration of the thermal management equipment, improving the feasibility of a redundant power supply system.

[0520] Please continue to refer to Figures 26 to 28 , Figures 31 to 36 In some embodiments, the housing 100 is provided with a first inlet 141 and a first outlet 142 communicating with the first sub-thermal management component 71, and a second inlet 143 and a second outlet 144 communicating with the second sub-thermal management component 72; or, the housing 100 is provided with a third inlet (not shown) and a third outlet (not shown) communicating with the first sub-thermal management component 71 and the second sub-thermal management component 72.

[0521] The housing 100 is provided with a first inlet 141 and a first outlet 142 communicating with the first sub-thermal management component 71, and a second inlet 143 and a second outlet 144 communicating with the second sub-thermal management component 72.

[0522] Optionally, the battery chamber 101 includes a first battery chamber 1011 and a second battery chamber 1012. A first inlet 141 and a first outlet 142 are correspondingly disposed on the wall of the first battery chamber 1011. The first inlet 141 and the first outlet 142 are used to allow the heat exchange medium to flow into and out of the first sub-thermal management component 71. A second inlet 143 and a second outlet 144 are correspondingly disposed on the wall of the second battery chamber 1012. The second inlet 143 and the second outlet 144 are used to allow the heat exchange medium to flow into and out of the first sub-thermal management component 71. Optionally, the first inlet 141 and the first outlet 142 are arranged vertically, and the second inlet 143 and the second outlet 144 are arranged vertically to save space. Optionally, the first inlet 141, the first outlet 142, the second inlet 143, and the second outlet 144 are located on the same side of the housing 100 for easy connection of the heat exchange medium source.

[0523] In another embodiment, the housing 100 is provided with a third inlet and a third outlet communicating with the first sub-thermal management component 71 and the second sub-thermal management component 72. The first sub-thermal management component 71 and the second sub-thermal management component 72 each have heat exchange channels communicating with the third inlet and the third outlet, respectively. The third inlet and the third outlet are used to allow the heat exchange medium to flow into and out of the first sub-thermal management component 71 and the second sub-thermal management component 72. Optionally, the thermal management component 70 is provided with a channel for diverting flow to the first sub-thermal management component 71 and the second sub-thermal management component 72. The first sub-thermal management component 71 and the second sub-thermal management component 72 can be arranged in parallel; alternatively, the first sub-thermal management component 71 and the second sub-thermal management component 72 can also be arranged in series, or in a series-parallel configuration.

[0524] By adopting the above technical solution, both the first sub-thermal management component 71 and the second sub-thermal management component 72 can form a circulating flow path, which facilitates connection to the heat exchange medium source. Similarly, by configuring independent inlets and outlets for the first sub-thermal management component 71 and the second sub-thermal management component 72, a redundant configuration is formed from the inflow and outflow of the heat exchange medium, which further improves the feasibility of redundant power supply.

[0525] In some embodiments, the first sub-thermal management component 71 and the second sub-thermal management component 72 are integrally disposed, the first sub-thermal management component 71 has a first heat exchange channel corresponding to the first battery pack 300, and the second sub-thermal management component 72 has a second heat exchange channel corresponding to the second battery pack 400, and the first heat exchange channel and the second heat exchange channel are independent of each other; or, the first sub-thermal management component 71 and the second sub-thermal management component 72 are independently disposed.

[0526] like Figure 30 , Figures 32 to 35 As shown, in some embodiments, the first sub-thermal management component 71 and the second sub-thermal management component 72 are independently configured. The first sub-thermal management component 71 is located in the first battery cavity 1011 and is connected to the first inlet 141 and the first outlet 142; the second sub-thermal management component 72 is located in the second battery cavity 1012 and is connected to the second inlet 143 and the second outlet 144. The first sub-thermal management component 71 and the second sub-thermal management component 72 are not only spaced apart, but their internal flow channels are also independently configured. In this way, the first sub-thermal management component 71 and the second sub-thermal management component 72 can be flexibly configured and thermally managed independently.

[0527] In another embodiment, the first sub-thermal management component 71 and the second sub-thermal management component 72 are integrally disposed, but the first heat exchange channel and the second heat exchange channel are independent of each other.

[0528] For example, please refer to Figure 35 The first thermal management component 71 and the second thermal management component 70 can be integrated into a heat exchange plate. The heat exchange plate is provided with an independent first heat exchange channel and a second heat exchange channel. The first heat exchange channel corresponds to the first battery pack 300, and the second heat exchange channel corresponds to the second battery pack 400.

[0529] For example, the first battery pack 300 and the second battery pack 400 are not located in the separately arranged first battery cavity 1011 and second battery cavity 1012. For example, the first battery pack 300 and the second battery pack 400 are arranged alternately, and the first heat exchange channel and the second heat exchange channel can also be arranged alternately.

[0530] By adopting the above technical solution, the first sub-thermal management component 71 and the second sub-thermal management component 72 can be an integrated component with independent heat exchange channels or two independent components, both of which can achieve independent thermal management effects.

[0531] Please refer to Figure 36 In some embodiments, the first battery pack 300 and the second battery pack 400 are arranged in two layers; the thermal management component 70 is disposed between the first battery pack 300 and the second battery pack 400.

[0532] The first battery pack 300 and the second battery pack 400 are arranged in two layers, that is, two layers along the height direction of the housing 100. The thermal management component 70 is located between the first battery pack 300 and the second battery pack 400, and can perform thermal management on both battery packs 1001 at the same time, saving the space and cost of the thermal management component 70.

[0533] Optionally, the first battery pack 300 is disposed in the first battery cavity 1011, and the second battery pack 400 is disposed in the second battery cavity 1012. The first battery cavity 1011 and the second battery cavity 1012 are arranged in two layers, and the separation structure 30 includes a thermal management component 70. In this way, the first battery pack 300 and the second battery pack 400 are isolated from each other, resulting in better reliability.

[0534] Please refer to Figure 23 , Figures 42 to 47 In some embodiments, the first battery cell 310 and the second battery cell 410 may be arranged in an overlapping manner within the housing 100.

[0535] like Figure 23 As shown, the box 100 includes a tray 10 and a cover 20, with the cover 20 covering one side of the tray 10 along a first direction; as Figure 42 As shown, the first battery cell 310 and the second battery cell 410 are arranged alternately along a second direction, which is perpendicular to the first direction.

[0536] The first direction is the height direction of the housing 100, and the second direction can be the length or width direction of the housing 100. For example, multiple first battery cells 310 are arranged in the first row, multiple second battery cells 410 are arranged in the second row, and so on, with multiple rows of first battery cells 310 and multiple rows of second battery cells 410 arranged alternately.

[0537] By adopting the above technical solution, it is beneficial to achieve the complementary advantages of the first battery cell 310 and the second battery cell 410, thereby improving the energy density of the battery device 1100.

[0538] In some embodiments, the housing 100 has a first exhaust channel corresponding to the first battery pack 300 and a second exhaust channel corresponding to the second battery pack 400, and the exhaust paths of the first exhaust channel and the second exhaust channel are different; the first battery cell 310 has a first cell pressure relief mechanism 311, which is configured to communicate with the first exhaust channel; the second battery cell 410 has a second cell pressure relief mechanism 411, which is configured to communicate with the second exhaust channel.

[0539] The first battery cell 310 has a first cell pressure relief mechanism 311, which is configured to communicate with a first exhaust channel; the second battery cell 410 has a second cell pressure relief mechanism 411, which is configured to communicate with a second exhaust channel; the first cell pressure relief mechanism 311 and the second cell pressure relief mechanism 411 are respectively arranged in different directions.

[0540] like Figure 43As shown, one of the first unit pressure relief mechanism 311 and the second unit pressure relief mechanism 411 faces the tray 10 and the other faces the cover 20. The first unit pressure relief mechanism 311 and the second unit pressure relief mechanism 411 can respectively exhaust air to the upper and lower sides of the box 100.

[0541] like Figures 44 to 46 As shown, the first unit pressure relief mechanism 311 and the second unit pressure relief mechanism 411 are oriented opposite to each other along a third direction, which is perpendicular to the first direction and intersects the second direction. The third direction can be either the width direction of the housing 100 or the length direction of the housing 100. Figure 46 As shown, the first unit pressure relief mechanism 311 can exhaust air to one side of the housing 100 in the width direction, and the second unit pressure relief mechanism 411 can exhaust air to the other side of the housing 100 in the width direction.

[0542] like Figure 45 As shown, the housing 100 is provided with a battery cavity 101, and the battery cavity 101 is provided with a baffle extending along the second direction. The baffle divides the space inside the housing 100 into multiple sub-cavities. At least one sub-cavity is provided with a first battery cell 310 and a second battery cell 410 arranged alternately along the second direction.

[0543] Please refer to Figure 45 and Figure 47 The first exhaust channel includes a first sub-channel and a second sub-channel that are connected. The first sub-channel is located on the side of the first battery cell 310 where the first cell pressure relief mechanism 311 is located, and the second sub-channel is located on the side of the first sub-channel facing the top cover 20. And / or, the second exhaust channel includes a third sub-channel and a fourth sub-channel that are connected. The third sub-channel is located on the side of the second battery cell 410 where the second cell pressure relief mechanism 411 is located, and the fourth sub-channel is located on the side of the second sub-channel facing the lower cover 20. Thus, the first cell pressure relief mechanism 311 can exhaust air towards one side of the width direction and one side of the height direction of the housing 100, and the second cell pressure relief mechanism 411 can exhaust air towards the other side of the width direction and the other side of the height direction of the housing 100, achieving different exhaust paths for the first exhaust channel and the second exhaust channel.

[0544] By adopting the above technical solution, the exhaust channels of the first battery pack 300 and the second battery pack 400 have different exhaust paths. The emissions generated by the thermal runaway of one of the battery packs 1001 can be discharged outward along one exhaust channel, reducing the impact on the other battery pack 1001 and improving the reliability of the battery device 1100.

[0545] Please refer to Figure 48In some embodiments, the first battery pack 300 further includes a first strip 330, which connects two adjacent first battery cells 310 arranged along a second direction and is insulated from a second battery cell 410 between the two first battery cells 310; the first battery pack 300 also includes a second strip 430, which connects two adjacent second battery cells 410 arranged along a second direction and is insulated from a first battery cell 310 between the two second battery cells 410.

[0546] The first battery cell 310 has two terminals with opposite polarities, and the second battery cell 410 also has two terminals with opposite polarities. A first electrode 330 spans across the two first battery cells 310 and the one second battery cell 410, so that the first electrode 330 can electrically connect the terminals of the two first cells. Similarly, a second electrode 430 spans across the two second battery cells 410 and the one first battery cell 310, so that the second electrode 430 can electrically connect the terminals of the two second battery cells 410.

[0547] Optionally, the first panel 330 and the second panel 430 are spaced apart in the height direction of the housing 100, which is beneficial for insulation.

[0548] By adopting the above technical solution, the first battery cell 310 and the second battery cell 410 are stacked, the first battery pack 300 is electrically connected through multiple first tabs 330, and the second battery pack 400 is electrically connected through multiple second tabs 430. The first battery pack 300 and the second battery pack 400 can independently supply power to the load 900.

[0549] Please refer to this again. Figure 28 In some embodiments, the first main terminal 320 is connected to the first insulating sampling structure 321, and the second main terminal 420 is connected to the second insulating sampling structure 421.

[0550] Optionally, the first insulation sampling structure 321 and the second insulation sampling structure 421 are used to acquire insulation voltage.

[0551] Optionally, the first insulating sampling structure 321 and / or the second insulating sampling structure 421 are located inside the electrical cavity 102, which provides better reliability.

[0552] By adopting the above technical solution, the battery device 1100 can perform insulation sampling on the first battery pack 300 using the first insulation sampling structure 321, and can perform insulation sampling on the second battery pack 400 using the second insulation sampling structure 421. That is, it realizes that the first battery pack 300 and the second battery pack 400 can be individually sampled for insulation, which can promptly detect insulation failure in a certain battery pack 1001 and facilitate timely maintenance and handling.

[0553] In some embodiments, the battery device 1100 further includes a first battery information management component and a second battery information management component. The first battery information management component is used to monitor and / or manage the state of the first battery cell 310 in the first battery pack 300, and the second battery information management component is used to monitor and / or manage the state of the second battery cell 410 in the second battery pack 400.

[0554] The first battery information management component is electrically connected to the first battery pack 300 and is used to monitor and manage the status of the first battery cell 310 in the first battery pack 300. The status of the first battery cell 310 includes at least one of the following: voltage, temperature, current, etc.

[0555] The second battery information management component is electrically connected to the first battery pack 300 and is used to monitor and manage the status of the second battery cell 410 in the second battery pack 400. The status of the second battery cell 410 includes at least one of the following: voltage, temperature, current, etc.

[0556] By adopting the above technical solution, the first battery pack 300 and the second battery pack 400 can be independently monitored and managed, so as to monitor the status of each battery pack 1001 respectively; the first battery information management component and the second battery information management component are set separately, so that even if one of the battery information management components has a problem, the other battery information management component can still work normally, which improves the reliability of the battery device 1100 to achieve redundant power supply.

[0557] In some embodiments, the first battery information management component includes a first cell monitoring circuit component, a first battery pack control circuit board, and a first battery management circuit board component, and the second battery information management component includes a second cell monitoring circuit component, a second battery pack control circuit board, and a second battery management circuit board component.

[0558] The first battery information management component is electrically connected to the first battery pack 300 and is used to monitor and manage the status of the first battery cell 310 in the first battery pack 300. The status of the first battery cell 310 includes at least one of the following: voltage, temperature, current, etc.

[0559] The second battery information management component is electrically connected to the second battery pack 400 and is used to monitor and manage the status of the second battery cell 410 in the second battery pack 400. The status of the second battery cell 410 includes at least one of the following: voltage, temperature, current, etc.

[0560] By adopting the above technical solution, the first battery pack 300 and the second battery pack 400 can be independently monitored and managed, so as to monitor the status of each battery pack 1001 respectively; the first battery information management component and the second battery information management component are set separately, so that even if one of the battery information management components has a problem, the other battery information management component can still work normally, thereby improving the reliability of the battery device 1100.

[0561] In some embodiments, the first battery information management component includes a first cell monitoring circuit component (CSC), a first battery pack control circuit board (CMC), and a first battery management circuit board component (BMS), which can independently monitor and manage the first battery pack 300; the second battery information management component includes a second cell monitoring circuit component (CSC), a second battery pack control circuit board (CMC), and a second battery management circuit board component (BMS), which can monitor and manage the second battery pack 400.

[0562] The cell monitoring circuit assembly is a cell monitoring circuit whose function is to collect voltage and temperature data of individual battery cells or battery packs.

[0563] The battery pack control circuit board is a processor for individual battery cell information. Its function is to process data from multiple individual battery cells within a single battery module and transmit it to the main controller, i.e., the battery management circuit board. In some cases, the battery pack control circuit board can also perform some of the functions of the main controller, i.e., the battery management circuit board, enabling hierarchical management.

[0564] The battery management circuit board assembly is the battery management unit, which is the core control unit of the battery pack. Its functions include monitoring battery status, fault handling, estimating remaining charge (SOC) and state of health (SOH), and communicating with other external control systems.

[0565] In some embodiments, the first battery information management component includes a first cell monitoring circuit component, a first battery pack control circuit board, and a first battery management circuit board component, and is capable of independently monitoring and managing the first battery pack; the second battery information management component includes a second cell monitoring circuit component, a second battery pack control circuit board, and a second battery management circuit board component, and is capable of monitoring and managing the second battery pack.

[0566] By setting up two independent battery information management components, independent monitoring and management of the first battery pack 300 and the second battery pack 400 are achieved, improving the reliability of the battery device 1100. By setting up two independent battery information management components, electrical control redundancy is achieved. When the battery information management component of the first battery pack 300 malfunctions, the electrical connection between the first battery pack 300 and the load 900 can be disconnected, and the second battery pack 400 can independently supply power to the load 900, further improving the feasibility of redundant power supply.

[0567] In some embodiments, the first battery cell 310 and the second battery cell 410 may be a prismatic battery cell, a cylindrical battery cell, or a blade battery cell, respectively.

[0568] A prismatic battery cell refers to a battery cell 1002 with a prismatic outer shell; a cylindrical battery cell refers to a battery cell 1002 with a cylindrical outer shell; and a blade-shaped battery cell refers to a battery cell 1002 with a blade-like outer shell, meaning the battery cell 1002 is thinner and longer. For example... Figure 41 As shown in (a) and (b), the first battery cell 310 or the second battery cell 410 is a prismatic battery cell; as Figure 41 As shown in (c), the first battery cell 310 or the second battery cell 410 is a blade battery cell; as Figure 41 As shown in (d), the first battery cell 310 or the second battery cell 410 is a cylindrical battery cell.

[0569] By adopting the above technical solution, the first battery cell 310 and the second battery cell 410 can be square battery cells, cylindrical battery cells or blade battery cells, respectively. The shapes of the first battery cell 310 and the second battery cell 410 can be the same or different. The arrangement of the first battery cell 310 and the second battery cell 410 can be flexibly adjusted. The battery device 1100 provided in this application embodiment can use a variety of battery cells 1002 to meet different needs.

[0570] In some embodiments, at least one of the first battery pack 300 and the second battery pack 400 is detachably connected to the housing 100.

[0571] By adopting the above technical solution, at least one of the first battery pack 300 and the second battery pack 400 can be easily removed and replaced from the housing 100, which facilitates maintenance and battery replacement.

[0572] In some embodiments, the first battery pack 300 is detachably connected to the housing 100, and the first battery cell 310 is a primary battery; and / or, the second battery pack 400 is detachably connected to the housing 100, and the second battery cell 410 is a primary battery.

[0573] Optionally, the first battery pack 300 is detachably connected to the housing 100, the first battery cell 310 is a primary battery, and the second battery cell 410 in the second battery pack 400 includes a secondary battery or a supercapacitor; or, the second battery pack 400 is detachably connected to the housing 100, the second battery cell 410 is a primary battery, and the first battery cell 310 in the first battery pack includes a secondary battery or a supercapacitor.

[0574] By adopting a technical solution, the battery cell 1002 in the battery pack 1001 in the battery device 1100, which is detachably connected to the housing 100, is a primary battery. Since the primary battery cannot be recharged, the battery pack 1001 can be easily replaced after the primary battery is used.

[0575] In the battery device of this application embodiment, the first battery cell and the second battery cell each independently include one or more of a secondary battery, a supercapacitor, and a primary battery, and at least one of the first battery cell and the second battery cell includes a secondary battery.

[0576] Optionally, both the first and second battery cells include a secondary battery.

[0577] Further optionally, the secondary battery includes one or more of the following: lithium secondary battery, sodium secondary battery, flow battery, lead-acid battery, nickel-cadmium battery, nickel-metal hydride battery, zinc halide battery, and air battery; the supercapacitor includes one or more of the following: electric double-layer capacitor, pseudocapacitor, and hybrid supercapacitor; and the primary battery includes one or more of the following: lithium primary battery, zinc-manganese dry cell battery, silver-zinc battery, lithium iron battery, and fuel cell.

[0578] In the above solutions, secondary batteries can be repeatedly charged and discharged hundreds to thousands of times. They have low energy cost per cycle and high energy density, making them suitable for scenarios requiring long-term battery life (such as electric vehicles, mobile phones, and energy storage power stations). Secondary batteries offer a wide range of material systems to choose from, with different chemical systems meeting diverse needs and adapting to various scenarios (automotive starting batteries, UPS power supplies, electric vehicles, drones, energy storage power stations, electric buses, hybrid vehicles, emergency equipment, etc.).

[0579] Lithium-ion batteries, depending on the form of the electrolyte, can include: lithium-ion batteries, lithium-ion polymer batteries, and solid-state lithium-ion batteries. Sodium-ion batteries include sodium-ion batteries and sodium metal batteries.

[0580] Supercapacitors are suitable for scenarios requiring instantaneous high power, such as electric vehicle acceleration / braking energy recovery, power grid frequency regulation, and UPS power supply instantaneous compensation; they can meet the needs of frequent charging and discharging, such as power tools and crane lifting systems; and in extreme temperature environments, such as aerospace and polar equipment, the power and charging and discharging capabilities of supercapacitors can still be effectively utilized.

[0581] In some embodiments, the combination of the first battery cell and the second battery cell may include: secondary battery + primary battery; secondary battery + secondary battery; secondary battery + supercapacitor.

[0582] In some embodiments, depending on the requirements, the following different battery system combinations can be selected to achieve complementary advantages of different battery systems: Combination (1): Energy replenishment scheme, the first battery cell is a fast-charging, high-safety, low-temperature, high-power or long-life battery cell, and the second battery cell is a high-energy-density battery cell.

[0583] When applied in vehicles, the first battery pack can serve as the main battery pack, while the second battery cell can serve as a secondary battery pack. High-energy-density individual cells, due to their high energy density, can increase driving range and do not require frequent charging. They are suitable for providing emergency power to the main battery pack or for direct emergency use in case of main pack failure, thus alleviating range anxiety to some extent.

[0584] High-energy-density battery cells possess high volumetric energy density or gravimetric energy density; this embodiment primarily relates to volumetric energy densit...

Claims

1. A battery device for supplying power to a load, wherein, The battery device includes: The enclosure has an output interface for connecting to the power supply circuit of the load; A first battery pack is located inside the housing. The first battery pack includes a plurality of first battery cells, which are electrically connected to each other and form a first main terminal. The second battery pack is located inside the box. The second battery pack includes multiple second battery cells, which are electrically connected to each other to form a second main terminal. The first main terminal and the second main terminal are electrically connected to the output interface, and both the first main terminal and the second main terminal are configured to be able to connect and disconnect from the load.

2. The battery device according to claim 1, wherein, The load includes a first load, and the output interface includes a first output interface for connecting the power supply circuit of the first load. The first main terminal and the second main terminal are electrically connected to the first output interface. The first battery pack and the second battery pack are both capable of providing a first voltage to the first load. The first voltage range is greater than or equal to 150V.

3. The battery device according to claim 2, wherein, The first main terminal and the second main terminal are electrically connected to the first load via a switching module, which is configured to enable at least one of the following power supply modes: Power supply mode 1: Switching from power supply state 1 to power supply state 2; Power supply mode two: Switching from power supply state one to power supply state three; Power supply mode three: switching from power supply state one to power supply state two and switching from power supply state one to power supply state three; Power supply mode four: Switching between power supply state two and power supply state three; Power supply mode five: Switching from power supply state four to power supply state five; Power supply mode six: Switching from power supply state four to power supply state six; Power supply mode seven: Switching between power supply state one and power supply state four; In the first power supply state, the first battery pack and the second battery pack are connected in parallel to supply power to the first load. The second power supply state is as follows: the first battery pack supplies power to the first load, and the second battery pack is disconnected from the first load; The third power supply state is as follows: the second battery pack supplies power to the first load, and the first battery pack is disconnected from the first load; The fourth power supply state is: the first battery pack and the second battery pack are connected in series to supply power to the first load; The fifth power supply state is: disconnect the first battery pack and the second battery pack from the series connection, and connect the first battery pack and the first load. The sixth power supply state is as follows: disconnect the first battery pack and the second battery pack from the series connection, and connect the second battery pack and the first load.

4. The battery device as claimed in claim 3, wherein, The switch module includes; The first switch is connected to the first main terminal and is used to control the first battery pack to access the power supply circuit of the first load. The second switch, connected to the second main terminal, is used to control the second battery pack to access the power supply circuit of the first load.

5. The battery device as claimed in claim 3, wherein, The switching module includes: The third switch connects the first pole of the first main terminal and the second pole of the second main terminal, and is used for on / off control of the series circuit of the first battery pack and the second battery pack.

6. The battery device according to claim 2, wherein, At least one of the first main terminal and the second main terminal is electrically connected to the first load through a first voltage conversion module, which is used to convert the voltage of the corresponding main terminal into the first voltage.

7. The battery device according to claim 6, wherein, The first main terminal is used to connect to the first load and to provide the first voltage to the first load through the first battery pack; The second main terminal provides the first voltage to the first load through the first voltage conversion module.

8. The battery device according to claim 6, wherein, The first voltage conversion module is a unidirectional voltage conversion module; or The first voltage conversion module is a bidirectional voltage conversion module.

9. The battery device according to any one of claims 1 to 8, wherein, The load includes a second load, and the output interface includes a second output interface for connecting to the power supply circuit of the second load. At least one of the first main terminal and the second main terminal is electrically connected to the second output interface. At least one of the first battery pack and the second battery pack is capable of providing a second voltage to the second load, and the second voltage is less than or equal to 60V.

10. The battery device according to claim 9, wherein, At least one of the first main terminal and the second main terminal is electrically connected to the second load through a second voltage conversion module, which is used to convert the voltage of the corresponding main terminal into a second voltage.

11. The battery device according to claim 10, wherein, The second voltage conversion module is a unidirectional voltage conversion module; or The second voltage conversion module is a bidirectional voltage conversion module.

12. The battery device according to any one of claims 1 to 8, wherein, The load includes a first load and a second load, and the first main terminal and the second main terminal are used to connect to the first load to output a first voltage to the first load; The first main terminal and the second main terminal are connected to the second voltage conversion module, and are used to output a second voltage to the second load through the second voltage conversion module, wherein the first voltage is greater than the second voltage.

13. The battery device according to any one of claims 1 to 8, wherein, The load includes a first load and a second load, and the first main terminal is used to connect to the first load to output a first voltage to the first load; The first main terminal is connected to the second voltage conversion module, and is used to output the second voltage to the second load through the second voltage conversion module; The second main terminal is connected to the first voltage conversion module and is used to output the first voltage to the first load through the first voltage conversion module; The second main terminal is used to connect to the second load to output a second voltage to the second load, wherein the first voltage is greater than the second voltage.

14. The battery device according to any one of claims 1 to 8, wherein, The load includes a first load and a second load, and the first main terminal and the second main terminal are used to connect to the first load to output a first voltage to the first load; The second main terminal is connected to the second voltage conversion module and is used to output a second voltage to the second load through the second voltage conversion module, wherein the first voltage is greater than the second voltage.

15. The battery device according to any one of claims 1 to 8, wherein, The load includes a first load and a second load, and the first main terminal is used to connect to the first load to output a first voltage to the first load; The second main terminal is used to connect the second load to output a second voltage to the second load; The second main terminal is connected to the first voltage conversion module and is used to output a first voltage to the first load through the first voltage conversion module. The first voltage is greater than the second voltage.

16. The battery device according to any one of claims 1 to 8, wherein, The enclosure also has an input interface for connecting to a charging circuit via the power grid; the first main terminal and the second main terminal are electrically connected to the charging circuit via a switch module, which is configured to enable at least one of the following charging modes: Charging Mode 1: Switches between Charging State 1 and Charging State 2; or Charging Mode 2: Switches between Charging State 1 and Charging State 3; Wherein, in the first charging state: the first battery pack and the second battery pack are connected in series in the charging circuit; The second charging state is: disconnecting the first battery pack and the second battery pack from the series connection, and connecting the second battery pack or the first battery pack with the charging circuit; The third charging state is as follows: disconnect the first battery pack and the second battery pack from the series connection, connect the first battery pack and the second battery pack in parallel, and connect them to the charging circuit.

17. The battery device according to any one of claims 1 to 8, wherein, Also includes: The first main terminal and the second main terminal are connected through a first voltage conversion module, and the second battery pack is also used to supply power to the first battery pack through the first voltage conversion module.

18. The battery device of claim 17, wherein, The first battery pack is also used to charge the second battery pack through the first voltage conversion module.

19. The battery device of claim 17, wherein, The battery device also includes: The first main terminal and the second main terminal are connected by a switch module, which is used to control the first battery pack and the second battery pack to be connected in series.

20. The battery device of claim 17, wherein, The first voltage conversion module includes a first voltage conversion element; The first voltage converter is connected to the first main terminal and the second main terminal respectively; The first battery pack charges the second battery pack through the first voltage converter, or the second battery pack charges the first battery pack through the first voltage converter.

21. The battery device of claim 17, wherein, The battery device further includes a battery information management component, which is also used to control the second battery pack to charge the first battery pack through the first voltage conversion module in a first preset state. The first preset state includes at least one of the following states: (1) When the remaining charge of the first battery pack is lower than the charge threshold; (2) When the remaining charge of any one of the first battery cells in the first battery pack is less than the first threshold; (3) The voltage of any one of the first battery cells in the first battery pack is lower than the second threshold.

22. The battery device of claim 17, wherein, The load includes a first load, and the battery device further includes a battery information management component. The battery information management component is also used to control the second battery pack to charge the first battery pack through the first voltage conversion module in a second preset state, and to control the first battery pack to provide a first voltage to the first load. The second preset state includes the first battery pack outputting a first voltage to the first load, and at least one of the following states: (1) When the remaining charge of the first battery pack is less than 30%; (2) When the remaining charge of any one of the first battery cells in the first battery pack is less than the first threshold; (3) The voltage of any one of the first battery cells in the first battery pack is lower than the second threshold.

23. The battery device of claim 17, wherein, The second battery pack includes at least one battery cell without a negative electrode; The battery device includes a thermal management component and a battery information management component, wherein the thermal management component is used to regulate the temperature of the second battery pack; The battery information management component is used to control the thermal management component to adjust the battery temperature of the second battery pack to be greater than 40°C when the second battery pack is in charging condition. The load includes a first load, and the battery device is used to connect to the first load; the first battery pack and the second battery pack are connected, and the second battery pack is used to output a first voltage to the first load.

24. The battery device of claim 17, wherein, The battery device further includes a battery information management component; the second battery pack includes at least one negative electrode-free battery cell; the second main terminal is connected to the first voltage conversion module. The battery information management component is used to control the first voltage conversion module to charge the second battery pack at a first rate when the battery device is in charging mode, wherein the first rate is ≤1C.

25. The battery device according to any one of claims 3-5, 16, and 19, wherein, The battery device further includes a first power distribution device. The first main terminal and the second main terminal are electrically connected to the first power distribution device through the switch module. The first power distribution device is electrically connected between the load and the switch module. The switch module is integrated into the first power distribution device.

26. The battery device according to any one of claims 3 to 5, wherein, The switch module is located inside the enclosure, and the first main terminal and the second main terminal are electrically connected to the first output interface through the switch module.

27. The battery device according to claim 26, wherein, The housing contains a battery cavity and an electrical cavity, with the first battery pack and the second battery pack located in the battery cavity; the switch module is located in either the battery cavity or the electrical cavity.

28. The battery device according to any one of claims 6 to 8, wherein, The first voltage conversion module is located inside the enclosure, and at least one of the first main terminal and the second main terminal is electrically connected to the first output interface through the first voltage conversion module.

29. The battery device according to claim 10 or 11, wherein, The second voltage conversion module is located inside the enclosure, and at least one of the first main terminal and the second main terminal is electrically connected to the second output interface through the second voltage conversion module.

30. The battery device according to any one of claims 1 to 8, wherein, The first main terminal and the second main terminal are located on the same side of the first battery pack and the second battery pack.

31. The battery device according to any one of claims 1 to 8, wherein, The housing is provided with a battery chamber, which includes a first battery chamber and a second battery chamber. The first battery pack is disposed in the first battery chamber, and the second battery pack is disposed in the second battery chamber. A partition structure is provided between the first battery chamber and the second battery chamber. The partition structure can block at least a portion of the emissions emitted by at least one of the first battery pack and the second battery pack in the event of thermal runaway.

32. The battery device according to claim 31, wherein, The separation structure is configured to seal and isolate the first battery cavity and the second battery cavity.

33. The battery device according to claim 31, wherein, The box includes a tray and a cover, the cover being disposed opposite to the tray along a first direction, and the cover covering the tray; The partition structure divides the housing into a first battery compartment and a second battery compartment, and the partition structure is connected to the cover and the tray on opposite sides along the first direction, respectively.

34. The battery device according to claim 33, wherein, The cover seals the first battery cavity and the second battery cavity. The partition structure also includes a sealing element, and the sealing element is provided between the partition structure and the cover and / or between the cover and the tray.

35. The battery device according to claim 33, wherein, The cover includes a first cover and a second cover, wherein the first cover seals the first battery cavity and the second cover seals the second battery cavity.

36. The battery device according to claim 31, wherein, The enclosure also includes an electrical cavity for accommodating electrical components. At least some of the electrical components are electrically connected to the first main terminal and the output interface, and at least some of the electrical components are electrically connected to the second main terminal and the output interface. The output interface passes through the cavity wall of the electrical cavity.

37. The battery device according to claim 36, wherein, The load includes a first load, and the output interface includes a first output interface for connecting the power supply circuit of the first load; the electrical component includes a first voltage conversion module, at least one of the first main terminal and the second main terminal is electrically connected to the first output interface through the first voltage conversion module to provide a first voltage to the first load, the first voltage being greater than or equal to 150V; and / or The load includes a second load, and the output interface includes a second output interface for connecting the power supply circuit of the second load; the electrical component includes a second voltage conversion module, and at least one of the second main terminal is electrically connected to the second output interface through the second voltage conversion module to provide a second voltage to the second load, the second voltage being less than or equal to 60V.

38. The battery device according to claim 36, wherein, The housing is provided with an electrical cavity partition, which is used to seal and isolate the electrical cavity from the first battery cavity and / or the second battery cavity; The electrical cavity partition is provided with a mounting hole, and the battery device further includes an adapter. The adapter is sealed through the mounting hole. One end of the adapter is electrically connected to at least one of the first main terminal and the second main terminal, and the other end of the adapter is electrically connected to an electrical component inside the electrical cavity.

39. The battery device according to claim 36, wherein, The electrical cavity, the first battery cavity, and the second battery cavity are arranged in the same layer, or the electrical cavity and at least one of the first battery cavity and the second battery cavity are arranged in two layers.

40. The battery device according to claim 36, wherein, The first battery cavity and the second battery cavity are sealed and isolated from the electrical cavity. The first battery cavity, the second battery cavity, and the electrical cavity are each provided with a pressure balancing mechanism. The first battery cavity and the second battery cavity are each provided with a pressure relief mechanism.

41. The battery device according to claim 31, wherein, The number of the first battery cavity and the second battery cavity can be one or more, wherein the arrangement of the first battery cavity and the second battery cavity includes one or more of the following: Arrangement method 1: The first battery cavity and the second battery cavity are arranged along the length of the housing; Arrangement method two: The first battery cavity and the second battery cavity are arranged along the width direction of the housing; Arrangement method three: The first battery cavity and the second battery cavity are arranged along the height direction of the housing; Arrangement method four: One of the first battery cavity and the second battery cavity is located at one corner of the housing; Arrangement method five: Several first battery cavities and several second battery cavities are arranged alternately.

42. The battery device according to claim 31, wherein, Within the first battery cavity, a plurality of the first battery cells are arranged along the length and / or width and / or height of the housing; Within the second battery cavity, a plurality of the first battery cells are arranged along the length and / or width and / or height of the housing.

43. The battery device according to claim 31, wherein, The housing is provided with at least one pressure relief mechanism, and the housing is provided with a pressure relief chamber. The pressure relief mechanism is connected to the pressure relief chamber. The first battery chamber can be connected to the pressure relief chamber when the first battery pack experiences thermal runaway. The second battery chamber can be connected to the pressure relief chamber when the second battery pack experiences thermal runaway.

44. The battery device according to claim 43, wherein, The housing includes side beams, and the hollow cavity within the side beams forms the pressure relief cavity; The pressure relief chamber is provided with a vent corresponding to the battery chamber, and each vent is provided with a sealing structure. The sealing structure can be actuated under preset conditions to connect the battery chamber and the pressure relief chamber.

45. The battery device according to claim 31, wherein, The housing is provided with a first pressure relief mechanism and a second pressure relief mechanism. The first battery cavity is correspondingly arranged with the first pressure relief mechanism, and the second battery cavity is correspondingly arranged with the second pressure relief mechanism.

46. ​​The battery device according to any one of claims 1 to 8, wherein, The battery device further includes a thermal management component for thermal management of the first battery pack and / or the second battery pack.

47. The battery device according to claim 46, wherein, The thermal management component includes at least a first sub-thermal management component and a second sub-thermal management component. The first sub-thermal management component is used to perform thermal management on the first battery pack, and the second sub-thermal management component is used to perform thermal management on the second battery pack.

48. The battery device according to claim 47, wherein, The housing is provided with a first inlet and a first outlet communicating with the first sub-thermal management component, and a second inlet and a second outlet communicating with the second sub-thermal management component; or, the housing is provided with a third inlet and a third outlet communicating with the first sub-thermal management component and the second sub-thermal management component.

49. The battery device according to claim 47, wherein, The first sub-thermal management component and the second sub-thermal management component are integrally formed. The first sub-thermal management component has a first heat exchange channel corresponding to the first battery pack, and the second sub-thermal management component has a second heat exchange channel corresponding to the second battery pack. The first heat exchange channel and the second heat exchange channel are independent of each other. Alternatively, the first sub-thermal management component and the second sub-thermal management component may be configured independently.

50. The battery device according to claim 46, wherein, The first battery pack and the second battery pack are arranged in two layers; The thermal management component is located between the first battery pack and the second battery pack.

51. The battery device according to any one of claims 1 to 8, characterized in that the housing comprises a tray and a cover, the cover being disposed on one side of the tray along a first direction; The first battery cell and the second battery cell are arranged alternately along a second direction, which is perpendicular to the first direction.

52. The battery device according to claim 51, wherein, The housing contains a first exhaust channel corresponding to the first battery pack and a second exhaust channel corresponding to the second battery pack, with different exhaust paths for the first and second exhaust channels; the first battery cell has a first cell pressure relief mechanism configured to communicate with the first exhaust channel; the second battery cell has a second cell pressure relief mechanism configured to communicate with the second exhaust channel.

53. The battery device according to claim 51, characterized in that the first battery pack further includes a first plate, the first plate connecting two adjacent first battery cells arranged along the second direction, and being insulated from the second battery cell between the two first battery cells; The first battery pack further includes a second plate, which connects two adjacent second battery cells along the second direction and is insulated from the first battery cell between the two second battery cells.

54. The battery device according to any one of claims 1 to 8, wherein, The first main terminal is connected to a first insulation sampling structure for collecting insulation voltage, and the second main terminal is connected to a second insulation sampling structure for collecting insulation voltage.

55. The battery device according to any one of claims 1 to 8, wherein, The battery device further includes a first battery information management component and a second battery information management component. The first battery information management component is used to monitor and / or manage the status of individual battery cells in the first battery pack, and the second battery information management component is used to monitor and / or manage the status of individual battery cells in the second battery pack.

56. The battery device according to claim 55, wherein, The first battery information management component includes a first cell monitoring circuit component, a first battery pack control circuit board, and a first battery management circuit board component. The second battery information management component includes a second cell monitoring circuit component, a second battery pack control circuit board, and a second battery management circuit board component.

57. The battery device according to any one of claims 1 to 8, wherein, The first battery cell and the second battery cell can be prismatic battery cells, cylindrical battery cells or blade battery cells, respectively.

58. The battery device according to any one of claims 1 to 8, wherein, At least one of the first battery pack and the second battery pack is detachably connected to the housing.

59. The battery device according to claim 58, wherein, The first battery pack is detachably connected to the housing, and the first battery cell is a primary battery; and / or, the second battery pack is detachably connected to the housing, and the second battery cell is a primary battery.

60. The battery device according to any one of claims 1 to 8, wherein, The first battery cell and the second battery cell each independently include one or more of a secondary battery, a supercapacitor, and a primary battery, and at least one of the first battery cell and the second battery cell includes a secondary battery.

61. The battery device according to claim 60, wherein, Both the first battery cell and the second battery cell include a secondary battery.

62. The battery device according to claim 60, wherein, The secondary battery includes one or more of the following: lithium secondary battery, sodium secondary battery, flow battery, lead-acid battery, nickel-cadmium battery, nickel-metal hydride battery, zinc halide battery, and air battery; the supercapacitor includes one or more of the following: electric double-layer capacitor, pseudocapacitor, and hybrid supercapacitor; the primary battery includes one or more of the following: lithium primary battery, zinc-manganese dry cell battery, silver-zinc battery, lithium iron battery, and fuel cell.

63. The battery device according to any one of claims 1 to 8, wherein, The chemical systems of the first battery cell and the second battery pack cells are different.

64. The battery device according to claim 63, wherein, The volumetric energy density of the first battery cell is in the range of 200Wh / L to 800Wh / L, and the total capacity of the first battery pack is not less than 40kWh. The second battery pack meets one of the following conditions: (1) When the volumetric energy density of the second battery cell is in the range of 200Wh / L to 800Wh / L, the total capacity of the second battery pack is not less than 20kWh; (2) When the volumetric energy density of the second battery cell is in the range of 800Wh / L to 1200Wh / L, the total capacity of the second battery pack is not less than 40kWh; (3) When the volumetric energy density of the second battery cell is in the range of 1200Wh / L to 2000Wh / L, the total capacity of the second battery pack is not less than 60kWh.

65. The battery device according to claim 60, wherein, The volume ratio of the first battery pack to the second battery pack is 0.05 to 10.

66. The battery device according to claim 65, wherein, The volume ratio is 0.1 to 8.

0.

67. The battery device according to claim 66, wherein, The volume ratio is 0.12 to 6.

0.

68. The battery device according to claim 60, wherein, The first battery cell and the second battery cell are each independently selected from any one or more of the following battery cells I to VII: (1) Battery cell I, wherein the volumetric energy density of battery cell I is in the range of 450Wh / L to 2000Wh / L, and battery cell I includes at least one of lithium iron phosphate-graphite lithium-ion battery cell, lithium manganese iron phosphate-graphite lithium-ion battery cell, ternary-graphite lithium-ion battery cell, hybrid cathode lithium-ion battery cell, lithium-ion non-negative electrode battery cell, semi-solid-state battery cell, and all-solid-state battery cell; (2) Battery cell II, wherein the battery cell II has an equivalent charging rate of 10%SOC-80%SOC at 25°C greater than or equal to 2C; (3) Battery cell III, wherein the thermal runaway temperature of the battery cell III is not lower than 250°C; and / or, the overcharge boundary of the battery cell III is not lower than 140% SOC; (4) Battery cell IV, wherein the charging time of battery cell IV from 10% SOC to 80% SOC at an ambient temperature of -10℃ is less than or equal to 40 min; and / or, the capacity retention rate of battery cell IV at an ambient temperature of -20℃ and charged at 0.33C is above 80%; and / or, battery cell IV includes at least one of sodium-ion battery cell, sodium-ion battery cell without negative electrode, sodium metal battery cell, lithium iron phosphate lithium-ion battery, ternary lithium-ion battery cell, and hybrid cathode lithium-ion battery cell, wherein the positive electrode active material of the hybrid cathode lithium-ion battery cell includes two or more of lithium iron phosphate, lithium manganese iron phosphate, and lithium-containing transition metal oxides; (5) Battery cell V, wherein the battery cell V is discharged at 5C rate to the lower limit cutoff voltage at 50% SOC, and the discharge time of the battery cell V is greater than or equal to 30s; and / or, the battery cell V is discharged at 3.5C for 10s at 50% SOC, and the DC impedance DCR of the battery cell V is less than 0.4mΩ; and / or, the power density of the battery cell V is not less than 500W / kg; (6) Battery cell VI, wherein when the battery cell VI is cycled to 70% SOH, the number of cycles of the battery cell VI is not less than 6000; (7) Battery cell VII, wherein the capacity retention rate of the second battery cell is not less than 95% when the battery cell VII is stored at an ambient temperature of 45°C for 90 days; and / or, the capacity retention rate of the second battery cell is not less than 98% when the battery cell VII is stored at an ambient temperature of 60°C for 60 days.

69. The battery device according to claim 68, wherein, The negative electrode active material in the ternary-graphite lithium-ion cell also includes silicon-based materials; the positive electrode active material in the hybrid cathode lithium-ion battery cell includes two or more of lithium iron phosphate, lithium manganese iron phosphate, and lithium nickel cobalt manganese oxide.

70. The battery device according to claim 68, wherein, At least one of the battery cells I is a lithium-ion battery cell without a negative electrode.

71. The battery device according to claim 68, wherein, The battery cell II has an equivalent charging rate of 2.5C or higher at 10% SOC-80% SOC.

72. The battery device according to claim 68, wherein, The battery cell II has an equivalent charging rate of 4C or higher at 10%-80% SOC.

73. The battery device according to claim 68, wherein, The discharge time of the battery cell V is greater than or equal to 60 seconds.

74. The battery device according to claim 68, wherein, The discharge time of the battery cell V is greater than or equal to 100s.

75. The battery device according to claim 68, wherein, The DC resistance DCR of the battery cell V is less than 0.3mΩ.

76. The battery device according to claim 68, wherein, The power density of the battery cell V is between 600 W / kg and 5000 W / kg.

77. The battery device according to claim 68, wherein, The number of cycles for the battery cell VI is not less than 6500.

78. The battery device according to claim 68, wherein, The energy density of the lithium-ion electrodeless battery cell is 450Wh / L~2000Wh / L; and / or, The positive electrode active material of the lithium-ion electrodeless battery cell is one or more of the following: olivine phase lithium phosphate, layered lithium transition metal oxide, and spinel phase lithium manganese-based oxide.

79. The battery device according to claim 78, wherein, The ratio of the number of moles of nickel to the total number of moles of transition metal elements in the layered lithium-containing transition metal oxide is 0.5 or more.

80. The battery device according to claim 79, wherein, The ratio of the number of moles of nickel to the total number of moles of transition metal elements in the layered lithium-containing transition metal oxide is greater than 0.

7.

81. The battery device according to claim 68, wherein, The lithium-ion electrodeless battery cell must meet at least one of the following conditions: (1) The positive electrode active material of the lithium-ion battery cell without negative electrode includes lithium iron phosphate, and the volumetric energy density of the lithium-ion battery cell without negative electrode ranges from 450 to 700 Wh / L. (2) The positive electrode active material of the lithium-ion electrodeless battery cell includes two or more of lithium iron phosphate, lithium manganese iron phosphate, and lithium-containing transition metal oxides, and the volumetric energy density of the lithium-ion electrodeless battery cell ranges from 600 to 1000 Wh / L. (3) The positive electrode active material of the lithium-ion electrodeless battery cell includes lithium-containing transition metal oxide, and the volumetric energy density of the lithium-ion electrodeless battery cell ranges from 650 to 2000 Wh / L.

82. The battery device according to claim 68, wherein, The negative electrode of the lithium-ion electrodeless battery cell includes a current collector capable of conducting electrons, and the current collector satisfies at least one of the following conditions: (1) The thickness of the current collector is in the range of 3μm to 8μm; (2) The surface roughness of the current collector is less than or equal to 0.3 μm; (3) The tensile strength of the current collector is 400MPa~1600MPa; (4) At least one side of the current collector is provided with a lithium metal layer.

83. The battery device according to claim 82, wherein, The thickness of the lithium metal layer ranges from 3μm to 30μm.

84. The battery device according to claim 83, wherein, The thickness of the lithium metal layer ranges from 5μm to 25μm.

85. The battery device according to claim 68, wherein, The cycle life of the lithium-ion electrodeless battery cell must meet at least one of the following conditions: (1) The lithium-ion electrodeless battery is charged and discharged at 25°C with a charging rate of 0.2C / discharging rate of 1C and within 80% of the depth of discharge, and has a cycle life of 150 to 400 cycles. (2) The lithium-ion electrodeless battery is charged and discharged at 25°C with a charge rate of 0.2C / discharge rate of 1C and within a discharge depth range of 50%, and the cycle life is 200 to 550 cycles. (3) The lithium-ion electrodeless battery is charged and discharged at 25°C with a charge rate of 0.2C / discharge rate of 1C and a discharge depth of 30%, and the cycle life is more than 550 cycles.

86. The battery device according to claim 68, wherein, The volumetric energy density of the second battery cell is greater than that of the first battery cell, and the second battery pack includes at least the battery cell I, and the second battery pack includes at least one or more of the battery cells II, IV, and VI.

87. The battery device according to claim 68, wherein, The second battery pack includes at least one of the following: lithium iron phosphate battery without negative electrode, lithium manganese iron phosphate battery without negative electrode, ternary battery cell without negative electrode, hybrid cathode battery cell without negative electrode, all-solid-state battery, and semi-solid-state battery. The first battery pack includes at least one of the following: lithium iron phosphate battery, lithium manganese iron phosphate battery, ternary lithium-ion battery cell, hybrid cathode lithium-ion battery cell, sodium-ion battery, all-solid-state battery, and semi-solid-state battery.

88. The battery device according to claim 68, wherein, The first battery cell has an equivalent charge rate of 10%-80% SOC greater than that of the second battery cell. The first battery pack includes at least the battery cell II, and the second battery pack includes at least one or more of the battery cells IV and VI.

89. The battery device according to claim 88, wherein, The first battery pack includes at least one of the following: lithium iron phosphate battery, lithium manganese iron phosphate battery, ternary lithium-ion battery cell, and hybrid cathode lithium-ion battery cell. The second battery pack includes at least one of the following: sodium-ion battery, lithium iron phosphate battery, lithium manganese iron phosphate battery, ternary lithium-ion cell, solid-state battery cell, and semi-solid-state battery cell.

90. The battery device according to claim 68, wherein, Under the same charge and discharge conditions, the cycle life of the first battery cell is more than 1.2 times that of the second battery cell, the first battery pack includes at least the battery cell VI, and the second battery pack includes at least one or more of the battery cells IV and VII.

91. The battery device according to claim 90, wherein, The first battery pack includes at least one of the following: lithium iron phosphate battery, lithium manganese iron phosphate battery, ternary lithium-ion battery cell, and hybrid cathode lithium-ion battery cell. The second battery pack includes at least one of the following: sodium-ion battery, lithium iron phosphate battery, ternary lithium-ion battery, solid-state battery cell, and semi-solid-state battery cell.

92. An electrical appliance, wherein, The battery device includes any one of claims 1 to 91.

93. The electrical appliance according to claim 92, wherein, The electrical device includes the load and the third voltage conversion module disposed outside the enclosure, and the load includes a first load and a second load; The output interface includes a first output interface and a second output interface, and the first main terminal and the second main terminal are electrically connected to the first output interface. The first output interface is connected to the power supply circuit of the first load, and both the first battery pack and the second battery pack can provide the first voltage to the first load; At least one of the first main terminal and the second main terminal is electrically connected to the second output interface, the second output interface is connected to the power supply circuit of the second load, and at least one of the first battery pack and the second battery pack can provide a second voltage to the second load, the second voltage being less than the first voltage; The first output interface is connected to the power supply circuit of the second load through the third voltage conversion module, so as to convert the first voltage into the second voltage and provide the second voltage to the second load through the third voltage conversion module.

94. An electrical appliance, wherein, The device includes the battery device according to any one of claims 3 to 5 and the switch module, wherein the switch module is located outside the housing, and the first output interface is electrically connected to the first load through the switch module.

95. An electrical appliance, wherein, The device includes the battery device according to any one of claims 6 to 8 and the first voltage conversion module, wherein the first voltage conversion module is located outside the casing and the first output interface is electrically connected to the first load through the first voltage conversion module.

96. An electrical device, wherein, The device includes the battery device as described in claim 10 or 11 and the second voltage conversion module, wherein the second voltage conversion module is located outside the housing, and the second output interface is electrically connected to the second load through the second voltage conversion module.

97. An electrical appliance, wherein, The battery device includes any one of claims 1 to 91, wherein the load includes a first load and a second load; and the output interface is used to connect to the first load and the second load.

98. The electrical appliance according to claim 97, wherein, The electrical device includes a vehicle, and the first load includes a drive system for driving the vehicle.

99. The electrical appliance according to claim 97, wherein, The electrical device includes a vehicle, and the second load includes a vehicle control system, which is used for vehicle body control.

100. The electrical appliance according to claim 97, wherein, The electrical device includes a vehicle, and the vehicle further includes an on-board charger (OBC). The battery device is connected to the on-board charger (OBC), and the on-board charger (OBC) is used to AC charge the vehicle.

101. The electrical appliance according to claim 97, wherein, The electrical device includes a vehicle, and the vehicle further includes an on-board battery for providing the second voltage to the second load.

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