Battery device, electric device, and energy storage device

Abstract

The application provides a battery device, a power consumption device and an energy storage device, which can effectively improve the performance of the battery device. The battery device comprises: a first battery monomer set comprising at least one first battery monomer; a second battery monomer set comprising at least one second battery monomer; and a on-off device for switching the working mode of the first battery monomer set and the second battery monomer set; wherein, along a first direction, at least part of the first battery monomers and at least part of the second battery monomers are arranged alternately.

Description

[0001] This application claims priority to PCT patent application PCT / CN2025 / 086719 entitled “Battery Device, Power Consumption Device and Energy Storage Device”, filed on April 1, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, and more specifically, to a battery device, an electrical device, and an energy storage device. Background Technology

[0003] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0004] In the development of battery technology, battery performance is a crucial factor influencing its advancement. Therefore, improving battery performance is a pressing issue that needs to be addressed. Summary of the Invention

[0005] This application provides a battery device, an electrical device, and an energy storage device, which can effectively improve the performance of the battery device.

[0006] In a first aspect, a battery device is provided, comprising: a first battery cell assembly including at least one first battery cell; a second battery cell assembly including at least one second battery cell; and an on / off device for switching the operating modes of the first battery cell assembly and the second battery cell assembly; wherein, along a first direction, at least a portion of the first battery cells and at least a portion of the second battery cells are alternately arranged.

[0007] In this embodiment, along a first direction, at least a portion of the first battery cells and at least a portion of the second battery cells are alternately arranged. Thus, the sets of first and second battery cells are interleaved, and an on / off device is used to switch the operating modes of the sets of first and second battery cells. On one hand, this allows the battery device to operate in various application scenarios, such as independent operation of the sets of first and second battery cells, series operation of the sets of first and second battery cells, and parallel operation, thereby improving the applicability and performance of the battery device. On the other hand, it enhances the flexibility of operating mode switching, allowing for better optimization and matching for actual application scenarios, enabling the battery device to perform better external work and better utilize its performance.

[0008] In some possible implementations, the positive electrode of the first battery cell assembly and the negative electrode of the second battery cell assembly are arranged adjacent to each other; and / or, the negative electrode of the first battery cell assembly and the positive electrode of the second battery cell assembly are arranged adjacent to each other.

[0009] This technical solution sets the positive terminal of the first battery cell assembly and the negative terminal of the second battery cell assembly to be adjacent, or sets the negative terminal of the first battery cell assembly and the positive terminal of the second battery cell assembly to be adjacent. On the one hand, this reduces the possibility of other problems and enables the battery device to work normally; on the other hand, it makes the output voltage of the first battery cell assembly and the output voltage of the second battery cell assembly as similar as possible. In this way, when the battery device supplies power to external devices, it can reduce the adverse effects on external devices.

[0010] In some possible implementations, along the first direction, the positive electrode of the first battery cell assembly and the negative electrode of the second battery cell assembly are arranged adjacent to each other, and along the second direction, the negative electrode of the first battery cell assembly and the positive electrode of the second battery cell assembly are arranged adjacent to each other; or, along the first direction, the negative electrode of the first battery cell assembly and the positive electrode of the second battery cell assembly are arranged adjacent to each other, and along the second direction, the positive electrode of the first battery cell assembly and the negative electrode of the second battery cell assembly are arranged adjacent to each other; wherein, the second direction is perpendicular to the first direction. This facilitates the alternating arrangement of the first and second battery cells along the first direction.

[0011] In some possible implementations, the number of the at least one first battery cell is multiple, the number of the at least one second battery cell is multiple, and the battery device further includes: a first busbar for connecting multiple first battery cells; a second busbar for connecting multiple second battery cells; wherein, along a second direction, the battery device includes a first end and a second end disposed opposite to each other, the second direction is perpendicular to the first direction, along the first direction, a portion of the first busbar disposed at the first end surrounds the second busbar disposed at the first end, and / or, a portion of the second busbar disposed at the second end surrounds the first busbar disposed at the second end.

[0012] This technical solution, in which a portion of the first busbar component at the first end surrounds the second busbar component, and / or the second busbar component at the second end surrounds the first busbar component, can achieve the purpose of alternating arrangement of at least a portion of the first battery cell and at least a portion of the second battery cell along the first direction.

[0013] In some possible implementations, a first pressure relief mechanism is provided on the at least one first battery cell, and the first pressure relief mechanism and the first busbar are disposed on two opposite walls of the at least one first battery cell along the height direction; and / or a second pressure relief mechanism is provided on the at least one second battery cell, and the second pressure relief mechanism and the second busbar are disposed on two opposite walls of the at least one second battery cell along the height direction; wherein the height direction is perpendicular to the first direction and the second direction.

[0014] This technical solution places the pressure relief mechanism and the busbar component on two opposite walls of the battery cells. This provides sufficient space for the busbar component and facilitates the cross-arrangement of the first and second battery cell assemblies. Furthermore, in the event of thermal runaway of the battery device, placing the pressure relief mechanism and the busbar component on two opposite walls of the battery cells effectively separates the flue gas generated by thermal runaway from the high-pressure system, reducing the possibility of a series of adverse effects caused by thermal runaway.

[0015] In some possible implementations, along the height direction, the first busbar is disposed below the plurality of first battery cells, and the second busbar is disposed above the plurality of second battery cells; or along the height direction, the first busbar is disposed above the plurality of first battery cells, and the second busbar is disposed below the plurality of second battery cells; wherein the height direction is perpendicular to the first direction and the second direction.

[0016] In this technical solution, along the height direction, the first busbar is positioned below the multiple first battery cells (i.e., the first battery cell assembly is in an inverted state), and the second busbar is positioned above the multiple second battery cells (i.e., the second battery cell assembly is in an upright state); or, the first busbar is positioned above the multiple first battery cells (i.e., the first battery cell assembly is in an upright state), and the second busbar is positioned below the multiple second battery cells (i.e., the second battery cell assembly is in an inverted state). In other words, the placement states of the first and second battery cell assemblies are reversed. This allows for separate electrical wiring between the first and second battery cell assemblies, reducing safety risks to the battery device. Furthermore, it allows for lower design standards for high-voltage insulation.

[0017] In some possible implementations, the first quantity is equal to the second quantity, where the first quantity is the number of first battery cells in the first battery cell set, and the second quantity is the number of second battery cells in the second battery cell set.

[0018] This technical solution sets the first quantity to be equal to the second quantity, so that the voltage of the first battery cell set is balanced with the voltage of the second battery cell set. This reduces the adverse effects on external devices when the battery device supplies power to them.

[0019] In some possible implementations, two second battery cells are disposed between two first battery cells along the first direction; and / or, two first battery cells are disposed between two second battery cells along the first direction. This arrangement can further improve the likelihood of balance between the sets of first and second battery cells.

[0020] In some possible implementations, the battery device further includes: a third busbar for connecting a first target battery cell and a second target battery cell, wherein at least one first battery cell includes the first target battery cell and at least one second battery cell includes the second target battery cell; wherein the switching device is disposed on the third busbar.

[0021] This technical solution places the switching device on the third busbar component, reducing the internal space occupied by the switching device in the battery device.

[0022] In some possible implementations, the at least one first battery cell is connected in series, with the first target battery being the last of the at least one first battery cell, and / or the at least one second battery cell is connected in series, with the second target battery cell being the last of the at least one second battery cell. This facilitates the normal operation of the battery device.

[0023] In some possible implementations, when the switching device is in the closed state, the operating mode includes a mode in which the first battery cell set and the second battery cell set operate in series.

[0024] This technical solution involves the first and second battery cell sets operating in series, resulting in a battery device voltage that is twice the voltage of the first and second battery cell sets operating independently. Therefore, when the battery device is used in an electrical appliance, the higher voltage allows for double the charging power, effectively increasing the charging rate and achieving overcharging or fast charging. When used in an energy storage device, the battery device can handle high-voltage, low-current peak shaving and frequency regulation needs, absorbing redundant power from the grid output. Furthermore, due to lower overcurrent, it can better utilize the battery device's performance.

[0025] In some possible implementations, when the switching device is in the off state, the operating mode includes a mode in which the first battery cell assembly operates independently and / or a mode in which the second battery cell assembly operates independently.

[0026] This technical solution includes a working mode in which the first battery cell assembly and the second battery cell assembly work independently. This not only increases the application scenarios of the battery device, but also reduces the voltage withstand requirements of electrical appliances, thereby reducing costs.

[0027] In some possible implementations, the operating mode includes a mode in which the first battery cell set and the second battery cell set operate alternately.

[0028] In this technical solution, the first and second battery cell assemblies operate alternately. When one assembly is active, the other acts as a heat insulation or buffer for the first assembly. Thus, if thermal runaway occurs in one assembly during operation, the other assembly can quickly prevent heat propagation. Furthermore, the alternating operation of the first and second battery cell assemblies allows them to expand and contract alternately, resulting in better electrolyte wetting within both assemblies and effectively improving the performance of the battery device.

[0029] In some possible implementations, the operating mode includes a mode in which the first set of battery cells and the second set of battery cells operate in parallel.

[0030] The above technical solution, when applied to electrical devices, reduces the load on individual battery cells during power output, thus increasing their lifespan. Furthermore, it lowers the insulation withstand voltage requirements for the electrical components in the device, thereby reducing costs. When applied to energy storage devices, a single energy storage device can output twice the power without affecting the lifespan of individual battery cells, effectively improving the performance of the battery system.

[0031] In a second aspect, an electrical device is provided, including the battery device described in the first aspect or its various implementations, the battery device being used to store or provide electrical energy.

[0032] Thirdly, an energy storage device is provided, comprising a plurality of battery devices as described in the first aspect or in various implementations thereof, the battery devices being used to store or provide electrical energy. Attached Figure Description

[0033] Figure 1 A schematic diagram of a vehicle according to an embodiment of this application is shown.

[0034] Figure 2 A schematic diagram of a battery device according to an embodiment of this application is shown.

[0035] Figure 3 A schematic diagram of another battery device according to an embodiment of this application is shown.

[0036] Figure 4 A schematic diagram of another battery device according to an embodiment of this application is shown.

[0037] Figure 5 A schematic diagram of another battery device according to an embodiment of this application is shown.

[0038] Figure 6 A schematic diagram of another battery device according to an embodiment of this application is shown. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the specification of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, rather than to describe a specific order or hierarchy.

[0041] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] In this application, "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0044] As society develops, consumers have increasingly higher demands for battery device performance, such as energy density, cycle life, discharge capacity, and charge / discharge rate. Furthermore, single-application scenarios for battery devices are no longer sufficient to meet consumer requirements; consumers expect a single battery device to be suitable for a wider range of applications. Therefore, consumers are placing increasing emphasis on the applicability of battery devices.

[0045] In view of this, embodiments of this application provide a battery device, which includes a first battery cell set, a second battery cell set, and a switching device. The first battery cell set includes at least one first battery cell, the second battery cell set includes at least one second battery cell, and the switching device is used to switch the operating modes of the first and second battery cell sets. Along a first direction, at least some of the first and second battery cells are alternately distributed. Thus, the first and second battery cell sets are interleaved, and the switching device is used to switch the operating modes of the first and second battery cell sets. On the one hand, this allows the battery device to operate in various application scenarios, such as scenarios where the first and second battery cell sets operate independently, scenarios where the first and second battery cell sets operate in series, and scenarios where they operate in parallel, thereby improving the applicability and performance of the battery device. On the other hand, it improves the flexibility of operating mode switching, allowing for better optimization and matching for actual application scenarios, enabling the battery device to perform better external work and better utilize its performance.

[0046] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0047] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0048] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0049] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0050] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0051] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices.

[0052] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical devices.

[0053] For example, such as Figure 1The diagram shown is a structural schematic of a vehicle 1 according to one embodiment of this application. Vehicle 1 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 motor 40, a controller 30, and a battery device 10 can be installed inside vehicle 1. The controller 30 controls the battery device 10 to supply power to the motor 40. For example, the battery device 10 can be installed at the bottom, front, or rear of vehicle 1. The battery device 10 can be used to power vehicle 1. For example, the battery device 10 can serve as the operating power source for vehicle 1, for example, to meet the electrical system requirements of vehicle 1, such as for starting, navigation, and operation. In another embodiment of this application, the battery device 10 can not only serve as the operating power source for vehicle 1, but also as the driving power source for vehicle 1, replacing or partially replacing gasoline or natural gas to provide driving power for vehicle 1.

[0054] Furthermore, the technical solutions of this application embodiment can also be applied to various energy storage devices using battery devices. Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. Energy storage devices can store electrical energy as needed and output it at appropriate times. For example, an energy storage device can store electrical energy during off-peak hours and provide it to relevant users or electrical devices during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices. Energy storage devices can be of various types and sizes. For example, an energy storage device can be an energy storage container or an energy storage cabinet. An energy storage device can be, for example, a regular cuboid structure, where the six faces of the cuboid are the six outer walls of the energy storage device. Setting the energy storage device as a cuboid structure facilitates its fixed placement and transportation. Of course, the energy storage device can also be of other shapes; for example, at least one wall of the energy storage device may be inclined.

[0055] Figure 2 A schematic diagram of a battery device 10 according to an embodiment of this application is shown. Figure 2 As shown, the battery device 10 includes a first battery cell set 110 and a second battery cell set 120. The first battery cell set 110 includes at least one first battery cell 111, and the second battery cell set 120 includes at least one second battery cell 121. Along a first direction, at least some of the first battery cells 111 and at least some of the second battery cells 121 are arranged alternately.

[0056] Figure 3 A schematic diagram of another battery device 10 according to an embodiment of this application is shown. Figure 3As shown, in addition to the first battery cell assembly 110 and the second battery cell assembly 120, the battery device 10 also includes a switching device 160, which is used to switch the operating modes of the first battery cell assembly and the second battery cell assembly.

[0057] In this embodiment, at least a portion of the first battery cells 111 and at least a portion of the second battery cells 121 are alternately arranged along a first direction. Thus, the first battery cell sets 110 and the second battery cell sets 120 are interleaved. The switching device 160 is used to switch the operating modes of the first battery cell sets 110 and the second battery cell sets 120. On one hand, this allows the battery device 10 to operate in various application scenarios, such as independent operation of the first battery cell sets 110 and 120, series operation of the first battery cell sets 110 and 120, and parallel operation of the first battery cell sets 110 and 120. This improves the applicability of the battery device 10 and consequently its performance. On the other hand, it enhances the flexibility of operating mode switching, allowing for better optimization and matching for actual application scenarios. This enables the battery device 10 to perform better external work and better utilize its performance.

[0058] The battery cells (such as the first battery cell 111 and the second battery cell 121) can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc., and this application embodiment is not limited to these. A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator disposed between the negative and positive electrodes. During the charging and discharging process of the battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, disposed between the positive and negative electrodes, can prevent short circuits between the positive and negative electrodes while allowing active ions to pass through.

[0059] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0060] The battery cell may also include a casing. The casing can be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc. In some embodiments, the casing can be a sealed structure or a non-sealed structure. As an example, when the casing is a non-sealed structure, it serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag can be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0061] The battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0062] At least one first battery cell 111 can be connected in series, and similarly, at least one second battery cell 121 can also be connected in series.

[0063] Refer again Figure 2 and Figure 3 The first direction (i.e., the x-direction) can be a direction perpendicular to the large surface of the battery device 10. Optionally, along the first direction, the first walls of two adjacent battery cells are arranged opposite each other, wherein the first wall is the wall with the largest area among all the walls of the battery cell, and the first direction can be the width direction of the battery device 10. In this way, when the battery device 10 is used in an electrical device (such as a vehicle), the driving direction of the electrical device is perpendicular to the first wall, thereby improving the collision safety of the electrical device.

[0064] Optionally, the switching device 160 can be, for example, a relay, switch, circuit breaker, transistor, microcontroller, etc. The battery management system can control the closing of the switching device 160 to switch the operating modes of the first battery cell set 110 and the second battery cell set 120. The scheme for switching the operating modes of the first battery cell set 110 and the second battery cell set 120 by the switching device 160 will be described later and will not be described in detail here.

[0065] In some embodiments, the positive electrode of the first battery cell set 110 and the negative electrode of the second battery cell set 120 may be arranged adjacent to each other, and / or the negative electrode of the first battery cell set 110 may be arranged adjacent to the positive electrode of the second battery cell 121.

[0066] This technical solution sets the positive terminal of the first battery cell assembly 110 and the negative terminal of the second battery cell assembly 120 adjacent to each other, or sets the negative terminal of the first battery cell assembly 110 adjacent to the positive terminal of the second battery cell 121. On the one hand, this reduces the possibility of other problems and enables the battery device to work normally; on the other hand, it makes the output voltage of the first battery cell assembly 110 and the output voltage of the second battery cell assembly 120 as similar as possible. In this way, when the battery device 10 supplies power to external devices, it can reduce the adverse effects on external devices.

[0067] like Figure 4As shown, the first battery cell assembly 110 is a battery cell assembly formed by terminal A and terminal C1, wherein terminal A is the negative electrode of the first battery cell assembly 110 and terminal C1 is the positive electrode of the first battery cell assembly 110. The second battery cell assembly 120 is a battery cell assembly formed by terminal B and terminal C2, wherein terminal B is the positive electrode of the second battery cell assembly 120 and terminal C2 is the negative electrode of the second battery cell assembly 120.

[0068] from Figure 4 It can be seen that the positive electrode of the first battery cell set 110 and the negative electrode of the second battery cell set 120 can be arranged adjacent to each other, and the negative electrode of the first battery cell set 110 can be arranged adjacent to the positive electrode of the second battery cell 121.

[0069] Of course, terminal A can also be the positive electrode of the first battery cell assembly 110, and terminal C1 can also be the negative electrode of the first battery cell assembly 110. Similarly, terminal B can also be the negative electrode of the second battery cell assembly 120, and terminal C2 can also be the positive electrode of the second battery cell assembly 120.

[0070] It should be noted that, in the embodiments of this application, the negative electrode of the first battery cell set 110 can be the total negative electrode of the output, and the positive electrode of the second battery cell set 120 can be the total positive electrode of the output.

[0071] In some embodiments, refer again Figure 4 Along the first direction, the positive electrode of the first battery cell assembly 110 and the negative electrode of the second battery cell assembly 120 are arranged adjacent to each other. At the same time, along the second direction, the negative electrode of the first battery cell assembly 110 and the positive electrode of the second battery cell assembly 120 are arranged adjacent to each other.

[0072] Alternatively, along the first direction, the negative electrode of the first battery cell set 110 and the positive electrode of the second battery cell set 120 are arranged adjacent to each other, while along the second direction, the positive electrode of the first battery cell set 110 and the negative electrode of the second battery cell set 120 are arranged adjacent to each other.

[0073] This facilitates the arrangement of alternating first battery cell 111 and second battery cell 121 along the first direction.

[0074] In some embodiments, the number of at least one first battery cell 111 can be multiple, and the number of at least one second battery cell can also be multiple. At this point, referring again... Figure 4 The battery device may further include a first busbar 130 and a second busbar 140. The first busbar 130 is used to connect a plurality of first battery cells 111, and the second busbar 140 is used to connect a plurality of second battery cells 121.

[0075] Along the second direction (i.e., the y-direction), the battery device includes a first end and a second end disposed opposite to each other. Along the first direction, a portion of the first busbar 130 disposed at the first end surrounds the second busbar 140 disposed at the first end, and / or, the second busbar 140 disposed at the second end surrounds the first busbar 130 disposed at the second end. The second direction is perpendicular to the first direction.

[0076] In this technical solution, the first busbar component 130 located at the first end surrounds the second busbar component 140, and / or the second busbar component 140 located at the second end surrounds the first busbar component 130, which can achieve the purpose of alternating arrangement of at least a portion of the first battery cell 111 and at least a portion of the second battery cell 121 along the first direction.

[0077] For example, such as Figure 4 As shown, at the first end, there are two first busbar components 130 surrounding the second busbar component 140, and at the second end, there are also two second busbar components 140 surrounding the first busbar component 130.

[0078] Refer again Figure 4 At the first end, the first busbar component 130 is shaped like a groove, with the second busbar component 140 positioned in the middle of the groove. Similarly, at the second end, the second busbar component 140 is shaped like a groove, with the first busbar component 130 positioned in the middle of the groove.

[0079] Of course, the first busbar component 130 and the second busbar component 140 can also be other shapes, as long as they can achieve the purpose of alternating arrangement of at least some of the first battery cells 111 and at least some of the second battery cells 121.

[0080] Optionally, the first busbar 130 can achieve electrical connection between the first battery cells 111 by connecting to the electrode terminals of the first battery cells 111. For example, the first busbar 130 can also be fixed to the electrode terminals of the first battery cells 111 by welding. Similarly, the second busbar 140 can achieve electrical connection between the second battery cells 121 by connecting to the electrode terminals of the second battery cells 121. For example, the second busbar 140 can also be fixed to the electrode terminals of the second battery cells 121 by welding.

[0081] In order to achieve the purpose of alternating arrangement of the first battery cell 111 and the second battery cell 121 along the first direction, in some embodiments, at least one first battery cell 111 is provided with a first pressure relief mechanism, and along the height direction (i.e., the z-direction), the first pressure relief mechanism and the first busbar 130 are provided on two opposite walls of at least one first battery cell 111, and / or, at least one second battery cell 121 is provided with a second pressure relief mechanism, and along the height direction, the second pressure relief mechanism and the second busbar 140 are provided on two opposite walls of at least one second battery cell 121.

[0082] This technical solution places the pressure relief mechanism and the busbar component on two opposite walls of the battery cells. This provides sufficient space for the busbar component, facilitating the cross-arrangement of the first battery cell assembly 110 and the second battery cell assembly 120. Furthermore, in the event of thermal runaway in the battery device 10, placing the pressure relief mechanism and the busbar component on the opposite walls of the battery cells effectively separates the flue gas generated by thermal runaway from the high-pressure system, reducing the possibility of a series of adverse effects caused by thermal runaway.

[0083] like Figure 4 As shown, if the first busbar component 130 is disposed on the top wall of the first battery cell 111, then the first pressure relief mechanism can be disposed on the bottom wall of the first battery cell 111. The top wall is the wall of the first battery cell 111 perpendicular to its height direction, and when the first battery cell 111 is in use, the top wall is located above the first battery cell 111. The bottom wall is the wall of the first battery cell 111 perpendicular to its height direction, and when the first battery cell 111 is in use, the top wall is located below the first battery cell 111.

[0084] Similarly, if the second busbar 140 is disposed on the top wall of the second battery cell 121, the second pressure relief mechanism can be disposed on the bottom wall of the second battery cell 121.

[0085] It should be noted that in this application embodiment, "up" means the direction opposite to the direction of gravity, and "down" means the direction in the same direction as the direction of gravity.

[0086] The first pressure relief mechanism is used to release the internal gas of the first battery cell 111, and the second pressure relief mechanism is used to release the internal gas of the second battery cell 121.

[0087] When the internal pressure or temperature of the first battery cell 111 (or the second battery cell 121) reaches a predetermined threshold, the first pressure relief mechanism (or the second pressure relief mechanism) activates, or a weak structure within the first pressure relief mechanism (or the second pressure relief mechanism) is damaged, thereby creating an opening or channel for the internal pressure or temperature to be released. This threshold design varies depending on design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the first battery cell 111 (or the second battery cell 121).

[0088] As an example, the first pressure relief mechanism may be integrally formed with the housing of the first battery cell 111, and / or the second pressure relief mechanism may be integrally formed with the housing of the second battery cell 121.

[0089] As an example, the first pressure relief mechanism may also be separately configured and connected to the housing of the first battery cell 111, and / or the second pressure relief mechanism may also be separately configured and connected to the housing of the second battery cell 121.

[0090] The term "actuation" as used in this application refers to the activation or actuation of the first pressure relief mechanism (or the second pressure relief mechanism) to a certain state, thereby releasing the internal pressure and temperature of the first battery cell 111 (or the second battery cell 121). The actions of the first or second pressure relief mechanism may include, but are not limited to: movement of components within the first or second pressure relief mechanism to form an exhaust channel; rupture, breakage, tearing, or opening of at least a portion of the first or second pressure relief mechanism, etc. When the first (or second) pressure relief mechanism is activated, the high-temperature, high-pressure material inside the first battery cell 111 (or the second battery cell 121) is discharged as waste from the activated portion. This method enables pressure and temperature relief in the first battery cell 111 (or the second battery cell 121) under controllable pressure or temperature, thereby preventing potentially more serious accidents.

[0091] In some embodiments, when the housing is a non-sealed structure, the first pressure relief mechanism (or the second pressure relief mechanism) can be configured as a through hole for discharging gas inside the first battery cell 111 (or the second battery cell 121).

[0092] The emissions mentioned in this application include, but are not limited to: electrolytes, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0093] In some embodiments, along the height direction, the first busbar 130 is disposed below the plurality of first battery cells 111, and the second busbar 140 is disposed above the plurality of second battery cells 121. Alternatively, along the height direction, the first busbar 130 is disposed above the plurality of first battery cells 111, and the second busbar 140 is disposed below the plurality of second battery cells 121.

[0094] In other words, the first battery cell set 110 and the second battery cell set 120 are arranged in opposite directions.

[0095] In this technical solution, along the height direction, the first busbar 130 is positioned below the plurality of first battery cells 111, i.e., the first battery cell assembly 110 is in an inverted state, and the second busbar 140 is positioned above the plurality of second battery cells 121, i.e., the second battery cell assembly 120 is in an upright state; or, the first busbar 130 is positioned above the plurality of first battery cells 111, i.e., the first battery cell assembly 110 is in an upright state, and the second busbar 140 is positioned below the plurality of second battery cells 121, i.e., the second battery cell assembly 120 is in an inverted state. In other words, the placement states of the first battery cell assembly 110 and the second battery cell assembly 120 are reversed. Thus, on the one hand, the electrical wiring of the first battery cell assembly 110 and the second battery cell assembly 120 can be separated, thereby reducing the safety risks of the battery device 10. On the other hand, it can lower the design standards for high-voltage insulation.

[0096] like Figure 5 As shown, in Figure 5 In the first battery cell assembly 110, the first busbar component 130 is positioned above the multiple first battery cells 111. In the second battery cell assembly 120, the second busbar component 140 is positioned below the multiple second battery cells 121.

[0097] In other embodiments, the first battery cell assembly 110 and the second battery cell assembly 120 may both be in an upright state or both in an inverted state. For example, as Figure 2 , Figure 3 and Figure 4 As shown, both the first battery cell set 110 and the second battery cell set 120 are in the positive position.

[0098] Since the first battery cell assembly 110 and the second battery cell assembly 120 are arranged in the same direction, the electrode terminals, busbar components, etc. of the two battery cell assemblies are also arranged in the same direction. Therefore, this arrangement can reduce the size of the battery device 10 in the height direction, thereby reducing the volume of the battery device 10.

[0099] In some embodiments, the first quantity may be equal to the second quantity, wherein the first quantity is the number of first battery cells in the first battery cell set, and the second quantity is the number of second battery cells in the second battery cell set.

[0100] This technical solution sets the first quantity to be equal to the second quantity, so that the voltage of the first battery cell set 110 and the voltage of the second battery cell set 120 are balanced. In this way, when the battery device 10 supplies power to the external device, the adverse effects on the external device can be reduced.

[0101] For example, if the first battery cell set 110 and the second battery cell set 120 alternately supply power to the external device, and if the number of first battery cells 111 in the first battery cell set 110 is different from the number of second battery cells 121 in the second battery cell set 120, then the voltage output by the first battery cell set 110 and the voltage output by the second battery cell set 120 will be different. In this case, the impact on the external device will be relatively large during the process of supplying power to the external device.

[0102] In some embodiments, one or more second battery cells 121 may be disposed between two first battery cells 111 along the first direction, and / or one or more first battery cells 111 may be disposed between two second battery cells 121 along the first direction.

[0103] In other words, along the first direction, one or more second battery cells 121 may be provided between two first battery cells 111 connected by the same busbar component, and / or one or more first battery cells 111 may be provided between two second battery cells 121 connected by the same busbar component.

[0104] For example, such as Figure 4 As shown, along the first direction, two second battery cells 121 are disposed between two first battery cells 111, and / or two first battery cells 111 are disposed between two second battery cells 121. This arrangement can further improve the possibility of balance between the first battery cell set 110 and the second battery cell set 120.

[0105] For example, along the first direction, at the first end, two second battery cells 121 may be disposed between two first battery cells 111, and at the second end, two first battery cells 111 may be disposed between two second battery cells 121.

[0106] Of course, along the first direction, other numbers of second battery cells 121 can also be arranged between two first battery cells 111, such as three second battery cells 121, four second battery cells 121, five second battery cells 121, etc. Similarly, along the first direction, other numbers of first battery cells 111 can also be arranged between two second battery cells 121.

[0107] Along the first direction, the number of first busbars 130 surrounding the second busbar 140 can be one (e.g., Figure 2 and Figure 3 As shown), it can also be multiple (such as...). Figure 4 (As shown). In the case of multiple first busbar components 130, these multiple first busbar components 130 can be arranged adjacent to each other. In this way, the possibility of balancing between the first battery cell assembly 110 and the second battery cell assembly 120 can be further improved, and thus the adverse effects on the external device can be further reduced when the battery device 10 supplies power to the external device.

[0108] For example, along the first direction, the first busbar 130 surrounding the second busbar 140 includes a first busbar 130a and a first busbar 130b. The first busbar 130a is used to connect the first battery cell a1 and the first battery cell a2, and the first busbar 130b is used to connect the first battery cell b1 and the first battery cell b2. The first busbar 130a and the first busbar 130b are arranged adjacent to each other, and the first battery cell a2 and the first battery cell b1 are also arranged adjacent to each other.

[0109] Of course, along the first direction, the number of second busbars 140 surrounding the first busbar 130 can be zero (e.g., Figure 2 and Figure 3 (As shown), it can be one, or, or multiple (such as...). Figure 4 As shown, the plurality of second bus components 140 can be arranged adjacent to each other.

[0110] As mentioned above, the battery device 10 in this application embodiment can be in multiple operating modes, such as the mode in which the first battery cell set 110 operates independently, the mode in which the second battery cell set 120 operates independently, the mode in which the first battery cell set 110 and the second battery cell set 120 operate in series, and the mode in which the first battery cell set 110 and the second battery cell set 120 operate in parallel.

[0111] The present application embodiment does not limit the position of the switching device 160 in the battery device 10, as long as the position of the switching device 160 does not affect the operation of other devices in the battery device 10, and can switch the working mode of the first battery cell set 110 and the second battery cell set 120.

[0112] For example, the switching device 160 can be set in an idle position within the battery 10. In this case, the switching device 160 can be connected to a battery cell set 110 and a second battery cell set 120 to switch the operating modes of the first battery cell set 110 and the second battery cell set 120.

[0113] In other embodiments, such as Figure 6 As shown, the battery device 10 may further include a third busbar 150. The third busbar 150 is used to connect a first target battery cell and a second target battery cell, at least one first battery cell 111 includes a first target battery cell, at least one second battery cell 121 includes a second target battery cell, and an on / off device 160 is disposed on the third busbar 150.

[0114] This technical solution involves placing the switching device 160 on the third busbar component 150, thereby reducing the internal space occupied by the switching device 160 in the battery device 10. For example, it reduces the internal space occupied by the switching device 160 in the first and second directions of the battery device 10.

[0115] The switching device 160 can be located at any position of the third busbar component 150, and this embodiment does not specifically limit it.

[0116] Optionally, at least one first battery cell 111 can be connected in series, and at least one second battery cell 121 can be connected in series. In some embodiments, the first target battery can be the last battery cell among at least one first battery cell 111, and the second target battery cell can be the last battery cell among at least one second battery cell 121. This is beneficial for the normal operation of the battery device 10.

[0117] As an example, when the on / off device 160 is in the closed state, the first battery cell set 110 and the second battery cell set 120 are connected in series, that is, the working mode includes the mode in which the first battery cell set 110 and the second battery cell set 120 work in series.

[0118] In this technical solution, the first battery cell assembly 110 and the second battery cell assembly 120 are connected in series, making the voltage of the battery device 10 twice the voltage of the first battery cell assembly 110 and the second battery cell assembly 120 when operating independently. Thus, when the battery device 10 is used in an electrical device, the higher voltage allows for double the charging power, effectively increasing the charging rate and achieving overcharging or fast charging. When the battery device 10 is used in an energy storage device, it can handle high-voltage, low-current peak shaving and frequency regulation needs, absorb redundant power from the grid, and, due to lower overcurrent, better utilize its performance.

[0119] As an example, the output voltage of the first battery cell assembly 110 is 400V, and the output voltage of the second battery cell assembly 120 is 400V. When the switching device 160 is closed, the first battery cell assembly 110 and the second battery cell assembly 120 are connected in series, and the output voltage of the battery device is 800V, thus meeting the voltage platform requirements of the vehicle or high-voltage energy storage. Similarly, the voltages of the first battery cell assembly 110 and the second battery cell assembly 120 can both be 200V, 600V, 800V, etc. The voltages of the first battery cell assembly 110 and the second battery cell assembly 120 can also be different, for example, 100V and 300V respectively, as long as the voltage requirements of the vehicle or energy storage system are met; this application does not limit this. When the switching device 160 is open, the first battery cell assembly 110 and the second battery cell assembly 120 can output electrical energy separately, thereby responding to the needs of the vehicle, allowing the first battery cell assembly 110 and the second battery cell assembly 120 to work alternately, reducing the risk of casing damage due to expansion force during battery operation.

[0120] Optionally, when the battery device 10 is in a charging state, the on / off device 160 can be closed to connect the first battery cell set 110 and the second battery cell set 120 in series, thereby increasing the charging speed of the battery device 10.

[0121] After the first battery cell assembly 110 and the second battery cell assembly 120 are connected in series, the voltage of the battery device 10 is increased to twice the original voltage, while the rated power of the battery device 10 remains unchanged.

[0122] It should be understood that before the first battery cell assembly 110 and the second battery cell assembly 120 are connected in series, the first battery cell assembly 110 and the second battery cell assembly 120 need to be at the same voltage level to reduce the possibility of circulating current. For example, the first battery cell assembly 110 and the second battery cell assembly 120 can be brought to the same voltage level by adjusting the state of charge (SOC) of either the first battery cell assembly 110 or the second battery cell assembly 120.

[0123] As another example, when the on / off device 160 is in the off state, the operating mode may include a mode in which the first battery cell assembly 110 and the second battery cell assembly 120 operate independently.

[0124] This technical solution includes a working mode in which the first battery cell assembly 110 and the second battery cell assembly 120 work independently. This not only increases the application scenarios of the battery device 10, but also reduces the voltage withstand requirements of electrical appliances, thereby reducing costs.

[0125] Optionally, during the discharge process of the battery device 10, the switching device 160 can be in an open state, so that the first battery cell assembly 110 and the second battery cell assembly 120 can operate independently. Of course, the first battery cell assembly 110 and the second battery cell assembly 120 can also operate independently during the charging process of the battery device 10.

[0126] For example, if the battery device 10 is used for an electrical device, the battery device 10 may include two 400V systems. If the battery device 10 is used for an energy storage device, the battery device 10 may include two 750V systems.

[0127] The independent operation of the first battery cell assembly 110 and the second battery cell assembly 120 can be as follows: during the operation of the battery device 10, the first battery cell assembly 110 is always in an independent operating state, while the second battery cell assembly 120 is always in an inactive state; or, during the operation of the battery device 10, the second battery cell assembly 120 is always in an independent operating state, while the first battery cell assembly 110 is always in an inactive state.

[0128] Alternatively, the first battery cell set 110 and the second battery cell set 120 may operate independently, or they may operate alternately. In other words, the operating mode includes a mode in which the first battery cell set 110 and the second battery cell set 120 operate alternately.

[0129] In this technical solution, the first battery cell assembly 110 and the second battery cell assembly 120 operate alternately. When one battery cell assembly is operating, the other battery cell assembly can act as a heat insulation pad or buffer pad for the first battery cell assembly 110. Thus, if thermal runaway occurs in one battery cell assembly during operation, the other battery cell assembly can quickly prevent the spread of heat. Furthermore, the alternating operation of the first battery cell assembly 110 and the second battery cell assembly 120 allows them to alternately expand / contract, resulting in better electrolyte wetting inside both battery cell assemblies 110 and 120, thereby effectively improving the performance of the battery device 10.

[0130] Specifically, when the first battery cell assembly 110 operates independently, the second battery cell assembly 120 acts as a buffer and heat insulation pad. During the charging process of the first battery cell assembly 110, as the voltage of the first battery cell assembly 110 increases, its expansion force also increases. This expansion force acts on the second battery cell assembly 120, which has no external interaction, allowing the first battery cell assembly 110 to have more expansion space. At this time, the electrode assembly in at least one second battery cell 121 is in a compressed state. Since the volume of the electrolyte inside the second battery cell 121 remains unchanged, when the outside of the second battery cell 121 is compressed, the electrolyte flows into the electrode assembly. During the discharging process of the first battery cell assembly 110, as the voltage of the first battery cell assembly 110 decreases, its expansion force also decreases. This expansion force acts on the second battery cell assembly 120, which has no external interaction, causing the elastic portion of the second battery cell assembly 120, which was compressed during the charging phase, to shrink back due to the existence of its elastic modulus, and thus the electrolyte will naturally seep out from the electrode assembly. By repeating the above process, the second battery cell assembly 120 will achieve a better wetting effect, thereby improving the performance of the second battery cell assembly 120 and the performance of the battery device 10.

[0131] On the other hand, if thermal runaway occurs in the first battery cell assembly 110 during charging and discharging, the state of charge (SOC) of the second battery cell assembly 120 can be arbitrarily adjusted. At this time, due to its lower energy, the risk of thermal diffusion is greatly reduced, thereby making the battery device 10 safer and its performance is greatly improved.

[0132] When the second battery cell assembly 120 operates independently, the first battery cell assembly 110 acts as a buffer and heat insulation pad. During the charging process of the second battery cell assembly 120, as the voltage of the second battery cell assembly 120 increases, its expansion force also increases. This expansion force acts on the first battery cell assembly 110, which has no external influence, allowing the second battery cell assembly 120 to have more expansion space. At this time, the electrode assembly in at least one of the first battery cells 111 is in a compressed state. Since the volume of the electrolyte inside the first battery cell 111 remains unchanged, when the outside of the first battery cell 111 is compressed, the electrolyte flows into the electrode assembly. During the discharging process of the second battery cell assembly 120, as the voltage of the second battery cell assembly 120 decreases, its expansion force also decreases. This expansion force acts on the first battery cell assembly 110, which has no external influence, causing the elastic portion of the first battery cell assembly 110, which was compressed during the charging phase, to shrink back due to the existence of its elastic modulus, and thus the electrolyte will naturally seep out from the electrode assembly. By repeating the above process, the first battery cell assembly 110 will achieve a better wetting effect, thereby improving the performance of the first battery cell assembly 110 and the performance of the battery device 10.

[0133] On the other hand, if thermal runaway occurs in the second battery cell assembly 120 during charging and discharging, since the SOC of the first battery cell assembly 110 can be arbitrarily adjusted, the risk of thermal diffusion is greatly reduced due to its lower energy, thereby making the battery device 10 safer and its performance greatly improved.

[0134] This application embodiment does not specifically limit the duration of alternating operation of the first battery cell set 110 and the second battery cell set 120. For example, the duration of each operation of the first battery cell set 110 and the second battery cell set 120 can be determined based on some parameters of the first battery cell set 110 and the second battery cell set 120. These parameters may include, for example, temperature, SOC, state of health (SOH), etc. Alternatively, the duration of operation of the first battery cell set 110 and the second battery cell set 120 can be determined based on the purpose of use and application scenario of the battery device 10.

[0135] Furthermore, the operating mode may also include a mode in which the first battery cell set 110 and the second battery cell set 120 operate in parallel.

[0136] At this time, the voltage of the battery device 10 remains constant. For example, if the voltage of the first battery cell assembly 110 and the second battery cell assembly 120 is 400V when operating independently, then the voltage of the battery device 10 is also 400V. The rated capacity of the battery device 10 is twice that of the first battery cell assembly 110 and the second battery cell assembly 120 when operating independently.

[0137] The rated capacity of battery device 10 is doubled. If battery device 10 is used in an electrical device, the load on a single battery cell can be reduced when the battery device 10 outputs power, increasing the lifespan of a single battery cell. Furthermore, it reduces the insulation withstand voltage requirements for the three electrical components (battery system, motor system, and electronic control system) in the electrical device, thereby reducing costs. If battery device 10 is used in an energy storage device, the energy storage device can output twice the power without affecting the lifespan of the battery cells when supplying power, as the voltage level remains constant, effectively improving the performance of battery device 10.

[0138] Refer again Figure 5 When the first battery cell set 110 and the second battery cell set 120 are connected in parallel, terminal A can be connected to terminal C2, and terminal B can be connected to terminal C1.

[0139] It should be understood that, similar to series connection, before the first battery cell set 110 and the second battery cell set 120 are connected in parallel, the first battery cell set 110 and the second battery cell set 120 need to be at the same voltage level to reduce the possibility of circulating current. For example, the first battery cell set 110 and the second battery cell set 120 can be brought to the same voltage level by adjusting the state of charge (SOC) of either the first battery cell set 110 or the second battery cell set 120.

[0140] According to some embodiments of this application, this application also provides an electrical device including the battery device 10 described in any of the above embodiments, and the battery device 10 is used to provide electrical energy to the electrical device.

[0141] The power supply device can be any of the aforementioned devices or systems that utilize battery device 10.

[0142] According to some embodiments of this application, this application also provides an energy storage device including one or more battery clusters to improve the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices 10 as described in any of the above embodiments, and the multiple battery devices 10 are connected in series via a busbar to improve the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to improve the capacity of the energy storage device.

[0143] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical devices during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0144] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0145] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0146] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 10 via piping for regulating the temperature of the individual battery cells.

[0147] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as a slave battery management unit (SBMU) and a fusion switch.

[0148] As an example, the master control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The master control module can monitor information such as the device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the master control module may include modules such as an insulation monitoring module (IMM), a master battery management unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0149] As an example, a fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage systems.

[0150] As an example, the power distribution unit can be used to distribute power to the power modules of the energy storage device.

[0151] This application also provides an energy storage system. In some embodiments, the energy storage system may include one or more energy storage devices and a power converter system (PCS) as described above, with the power converter system connected between the power generation device and the energy storage device. The power generation device generates electrical energy, which can be stored in the energy storage device through the power converter system. As examples, the power generation device may specifically be a solar panel, hydroelectric power generation equipment, thermal power generation equipment, wind power generation equipment, etc. The specific type of power generation device is not limited in this application.

[0152] Two adjacent energy storage devices in a plurality of energy storage devices can be installed in close proximity to each other. Here, close proximity means that there is no gap between two adjacent energy storage devices, and the two adjacent energy storage devices are placed side by side or back to back.

[0153] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: The first battery cell set includes multiple first battery cells; The second battery cell set includes multiple second battery cells; A switching device is used to switch the operating modes of the first battery cell assembly and the second battery cell assembly. A first busbar component is used to connect the plurality of first battery cells; The second busbar component is used to connect the plurality of second battery cells; Along the first direction, at least a portion of the first battery cells and at least a portion of the second battery cells are arranged alternately, and at least a portion of the first battery cells are provided with a plurality of second battery cells between two first battery cells, and / or at least a portion of the second battery cells are provided with a plurality of first battery cells between two second battery cells; Along a second direction, the battery device includes a first end and a second end disposed opposite to each other, the second direction being perpendicular to the first direction. Along the first direction, a portion of the first busbar portion disposed at the first end surrounds the second busbar portion disposed at the first end, and / or, a portion of the second busbar portion disposed at the second end surrounds the first busbar portion disposed at the second end.

2. The battery device according to claim 1, characterized in that, The positive electrode of the first battery cell assembly and the negative electrode of the second battery cell assembly are arranged adjacent to each other; and / or The negative electrode of the first battery cell assembly and the positive electrode of the second battery cell are arranged adjacent to each other.

3. The battery device according to claim 2, characterized in that, Along the first direction, the positive electrode of the first battery cell assembly and the negative electrode of the second battery cell assembly are arranged adjacent to each other; along the second direction, the negative electrode of the first battery cell assembly and the positive electrode of the second battery cell assembly are arranged adjacent to each other; or Along the first direction, the negative electrode of the first battery cell assembly and the positive electrode of the second battery cell assembly are arranged adjacent to each other; along the second direction, the positive electrode of the first battery cell assembly and the negative electrode of the second battery cell assembly are arranged adjacent to each other. The second direction is perpendicular to the first direction.

4. The battery device according to any one of claims 1 to 3, characterized in that, Each of the plurality of first battery cells is provided with a first pressure relief mechanism, and along the height direction, the first pressure relief mechanism and the first current-combining component are disposed on two opposite walls of the plurality of first battery cells; and / or A second pressure relief mechanism is provided on each of the plurality of second battery cells. Along the height direction, the second pressure relief mechanism and the second current-combining component are provided on two opposite walls of the plurality of second battery cells. The height direction is perpendicular to both the first direction and the second direction.

5. The battery device according to any one of claims 1 to 3, characterized in that, The first quantity is equal to the second quantity, where the first quantity is the number of first battery cells in the first battery cell set, and the second quantity is the number of second battery cells in the second battery cell set.

6. The battery device according to any one of claims 1 to 3, characterized in that, Along the first direction, two second battery cells are disposed between two first battery cells; and / or Along the first direction, two first battery cells are disposed between two second battery cells.

7. The battery device according to any one of claims 1 to 3, characterized in that, The battery device also includes: A third busbar is used to connect a first target battery cell and a second target battery cell, wherein the plurality of first battery cells include the first target battery cell and the plurality of second battery cells include the second target battery cell. The switching device is located on the third busbar component.

8. The battery device according to claim 7, characterized in that, The plurality of first battery cells are connected in series, and the first target battery is the last battery cell among the plurality of first battery cells, and / or The plurality of second battery cells are connected in series, and the second target battery cell is the last battery cell among the plurality of second battery cells.

9. The battery device according to any one of claims 1 to 3, characterized in that, When the switching device is in the closed state, the operating mode includes the mode in which the first battery cell set and the second battery cell set operate in series.

10. The battery device according to any one of claims 1 to 3, characterized in that, When the switching device is in the off state, the operating mode includes the mode in which the first battery cell set operates independently and / or the mode in which the second battery cell set operates independently.

11. The battery device according to any one of claims 1 to 3, characterized in that, The operating mode includes the mode in which the first set of battery cells and the second set of battery cells operate in parallel.

12. An electrical appliance, characterized in that, include: The battery device according to any one of claims 1 to 11 is used to store or provide electrical energy.

13. An energy storage device, characterized in that, include: Multiple battery devices according to any one of claims 1 to 11, the battery devices being used to store or provide electrical energy.

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