Battery device, energy storage device, energy storage system, power consuming device and charging network

Abstract

The application provides a battery device, an energy storage device, an energy storage system, a power utilization equipment and a charging network. The battery device comprises a limiting assembly, an integrated busbar and a plurality of battery monomers. The plurality of battery monomers are sequentially arranged along a first direction to form a battery monomer group. The battery monomer has a first surface, which is the surface with the largest area among the surfaces of the battery monomer. The first direction is perpendicular to the first surface. The limiting assembly comprises a first limiting piece and a second limiting piece. The first limiting piece and the second limiting piece are arranged on opposite sides of the battery monomer group along the first direction. The integrated busbar comprises an isolation seat. The isolation seat is connected between the first limiting piece and the second limiting piece. A second direction is perpendicular to the first direction. The battery device can improve the situation that the battery monomer is offset from the position of the integrated busbar when the battery monomer is swollen. Therefore, the risk of fracture at the electrical connection between each battery monomer and the corresponding busbar is effectively reduced, and the reliability of the battery device is effectively improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery device, energy storage device, energy storage system, electrical equipment, and charging network. Background Technology

[0002] With technological advancements, the battery industry has developed rapidly, and the market share and usage frequency of battery devices are increasing.

[0003] Battery devices typically include an integrated busbar and multiple battery cells. The integrated busbar is used to connect multiple battery cells in series, parallel, or series-parallel connections. However, because battery cells are prone to expansion during charging and discharging, any one or more of the battery cells may shift in position relative to the integrated busbar. This can easily lead to breakage at the electrical connection between the integrated busbar and the battery cells, which is detrimental to improving the reliability of the battery device. Utility Model Content

[0004] One of the objectives of this application is to provide a battery device, energy storage device, energy storage system, electrical equipment, and charging network, aiming to solve the technical problem that the electrical connection between the integrated busbar and the individual battery cells in the battery device is prone to breakage in the related art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted in this application embodiment is as follows: a battery device is provided, including a limiting component, an integrated busbar, and multiple battery cells; the multiple battery cells are arranged sequentially along a first direction to form a battery cell group, each battery cell having a first surface, which is the surface with the largest area among all the sides of the battery cell, and the first direction is perpendicular to the first surface; the limiting component includes a first limiting member and a second limiting member, which are respectively disposed on opposite sides of the battery cell group along the first direction; the integrated busbar includes an isolation seat disposed on one side of the battery cell group along a second direction and multiple busbars disposed on the isolation seat, the isolation seat being connected between the first limiting member and the second limiting member, and the multiple busbars being used to electrically connect the multiple battery cells, the second direction being perpendicular to the first direction.

[0006] The beneficial effects of the battery device provided in this application embodiment are as follows: the first limiting member and the second limiting member in the battery device provided in this application embodiment are respectively disposed on opposite sides of the battery cell group along the first direction to limit the position of the battery cells in the battery cell group, and the isolation seat is connected between the first limiting member and the second limiting member, so that the isolation seat can withstand at least part of the compressive force acting on the first limiting member and the second limiting member when the battery cell expands, and more effectively limit the position of the battery cell in the battery cell group. In this way, the positional displacement of the battery cell relative to the integrated busbar when the battery cell expands can be improved, thereby effectively reducing the risk of breakage at the electrical connection between each battery cell and the corresponding busbar, and effectively improving the reliability of the battery device.

[0007] In some embodiments of this application, the limiting component further includes a third limiting member and a fourth limiting member, which are respectively disposed on opposite sides of the battery cell assembly along a third direction. The third limiting member is connected between one side of the first limiting member and one side of the second limiting member, and the fourth limiting member is connected between the other side of the first limiting member and the other side of the second limiting member. The third direction is perpendicular to the first direction and the second direction.

[0008] By adopting the above technical solution, the third and fourth limiting members can jointly withstand at least part of the compressive force exerted on the first and second limiting members when the battery cell expands, thus more effectively limiting the position of the battery cell in the battery cell group. This further improves the situation where the battery cell is offset relative to the integrated busbar when it expands, further reduces the risk of breakage at the electrical connection between each battery cell and the corresponding busbar, and further improves the reliability of the battery device.

[0009] In some embodiments of this application, the third limiting member and / or the fourth limiting member are non-metallic parts.

[0010] By adopting the above technical solution, while effectively limiting the position of the battery cells in the battery cell pack, not only is the weight of the battery device effectively reduced and the weight energy density of the battery device improved, but the production cost of the battery device is also effectively reduced.

[0011] In some embodiments of this application, the battery device further includes a support member disposed on the side of the battery cell pack facing away from the isolation seat to support the battery cell pack, and both the first limiting member and the second limiting member are connected to the support member.

[0012] By adopting the above technical solution, the support can withstand at least part of the compressive force exerted on the first and second limiting members when the battery cells expand, thus more effectively limiting the position of the battery cells in the battery cell group. This further improves the situation where the battery cells are offset relative to the integrated busbar when they expand, further reduces the risk of breakage at the electrical connection between each battery cell and the corresponding busbar, and further improves the reliability of the battery device.

[0013] In some embodiments of this application, the battery device further includes a first connector and a second connector, wherein the first connector is used to connect the first limiting member and the supporting member, and the second connector is used to connect the second limiting member and the supporting member.

[0014] By adopting the above technical solution, it is easy to connect the first limiting member and the second limiting member to the support member.

[0015] In some embodiments of this application, the first connector is one of a bolt, screw, rivet, and pin; and / or, the second connector is one of a bolt, screw, rivet, and pin.

[0016] By adopting the above technical solution, it is not only convenient to connect the first limiting member and the second limiting member to the support member, but also to effectively improve the connection strength between the first limiting member and the support member and the connection strength between the second limiting member and the support member.

[0017] In some embodiments of this application, the limiting component further includes a third limiting member and a fourth limiting member, wherein the third limiting member, the fourth limiting member and the supporting member are integrally formed components.

[0018] By adopting the above technical solution, the third and fourth limiting members are fixed relative to the supporting members, which more effectively restricts the position of the battery cells in the battery cell group. This further improves the situation where the battery cells are offset relative to the integrated busbar when they expand, further reduces the risk of breakage at the electrical connection between each battery cell and the corresponding busbar, and thus further improves the reliability of the battery device.

[0019] In some embodiments of this application, the third limiting member, the fourth limiting member, and the supporting member are injection-molded components.

[0020] By adopting the above technical solutions, not only is the weight of the battery device effectively reduced and the weight energy density of the battery device improved, but the production cost of the battery device is also effectively reduced.

[0021] In some embodiments of this application, the battery device further includes a heat exchanger disposed on the side of the support facing the battery cells, and multiple battery cells are connected to the heat exchanger.

[0022] By adopting the above technical solution, the position of the battery cells is more effectively restricted, thereby further improving the situation of the battery cells being offset from the integrated busbar, further reducing the risk of breakage at the electrical connection between each battery cell and the corresponding busbar, and thus further improving the reliability of the battery device.

[0023] In some embodiments of this application, multiple battery cells are bonded to a heat exchanger.

[0024] By adopting the above technical solution, it is easy to fix multiple battery cells on the heat exchange component.

[0025] In some embodiments of this application, the support has heat exchange channels for circulating heat exchange medium.

[0026] By adopting the above technical solution, the heat exchange medium can exchange heat with the battery cells during the flow of the heat exchange channel, so as to regulate the temperature of the battery cells and keep the temperature of the battery cells within a suitable range, thereby effectively improving the charging and discharging performance of the battery device.

[0027] In some embodiments of this application, the isolation holder is connected to the battery cell pack.

[0028] By adopting the above technical solution, the relative position between the isolation seat and the battery cell is effectively limited, the positional offset of the battery cell relative to the integrated busbar is further improved, and the risk of breakage at the electrical connection between each battery cell and the corresponding busbar is further reduced, thereby further improving the reliability of the battery device.

[0029] In some embodiments of this application, the separator is bonded to the battery cell assembly.

[0030] By adopting the above technical solution, it is easy to connect the isolation seat to the battery cell pack.

[0031] In some embodiments of this application, the separator is provided with an adhesive discharge structure for discharging at least a portion of the adhesive located between the separator and the battery cell assembly to the side of the separator facing away from the battery cell assembly.

[0032] By adopting the above technical solution, the adhesive discharge structure can discharge excess adhesive to the side of the separator facing away from the battery cell assembly, thereby improving the situation where the adhesive flows to the side of the battery cell. This effectively reduces the risk of local stress on the battery cell after the adhesive solidifies on the side of the battery cell, and further improves the reliability of the battery device.

[0033] In some embodiments of this application, the isolation seat is provided with an adhesive discharge structure, which includes an adhesive discharge groove that passes through the opposite sides of the isolation seat along the second direction.

[0034] By adopting the above technical solution, excess adhesive can be quickly discharged from the side of the separator facing away from the battery cell pack, and the structure is simple and easy to implement.

[0035] In some embodiments of this application, the separator includes a separator body and an adhesive barrier structure. The separator body is bonded to the battery cell assembly, and the adhesive barrier structure is disposed on the side of the separator body facing the battery cell assembly. The adhesive barrier structure is used to prevent at least a portion of the adhesive located between the separator body and the battery cell assembly from flowing out to the side of the battery cell.

[0036] By adopting the above technical solution, the adhesive barrier structure can prevent the adhesive from flowing to the side of the battery cell, thereby effectively reducing the risk of local stress on the battery cell after the adhesive solidifies on the side of the battery cell, and further improving the reliability of the battery device.

[0037] In some embodiments of this application, the adhesive barrier structure includes an adhesive barrier strip, which is disposed on the side of the insulating body and abuts against the battery cell assembly.

[0038] By adopting the above technical solution, the adhesive can be effectively prevented from flowing to the side of the battery cell, and the structure is simple and easy to implement.

[0039] In some embodiments of this application, the battery device further includes a third connector and a fourth connector, the third connector being used to connect the isolation seat and the first limiting member, and the fourth connector being used to connect the isolation seat and the second limiting member.

[0040] By adopting the above technical solution, it is easy to connect the isolation seat to the first limiting member and the second limiting member.

[0041] In some embodiments of this application, the third connector is one of a bolt, screw, rivet, and pin; and / or, the fourth connector is one of a bolt, screw, rivet, and pin.

[0042] By adopting the above technical solution, it is not only convenient to connect the isolation seat to the first limiting member and the second limiting member, but also to effectively improve the connection strength between the isolation seat and the first limiting member and the connection strength between the isolation seat and the second limiting member.

[0043] In some embodiments of this application, the isolation seat is snapped together with the first limiting member; and / or, the isolation seat is snapped together with the second limiting member.

[0044] By adopting the above technical solution, it is easy to connect the isolation seat to the first limiting member and the second limiting member.

[0045] In some embodiments of this application, the isolation seat includes an insulator and a metal body, the insulator covering the outer surface of the metal body, and the metal body connecting the first limiting member and the second limiting member.

[0046] By adopting the above technical solution, the structural strength of the isolation seat is effectively improved, enabling the isolation seat to withstand more of the compressive force exerted on the first and second limiting members when the battery cells expand. This further restricts the position of the battery cells in the battery cell group, further improves the positional offset of the battery cells relative to the integrated busbar, thereby further reducing the risk of breakage at the electrical connection between each battery cell and the corresponding busbar, and further improving the reliability of the battery device.

[0047] In some embodiments of this application, the first limiting member and / or the second limiting member are non-metallic parts.

[0048] By adopting the above technical solution, while effectively limiting the position of the battery cells in the battery cell pack, not only is the weight of the battery device effectively reduced and the weight energy density of the battery device improved, but the production cost of the battery device is also effectively reduced.

[0049] Secondly, embodiments of this application also provide an energy storage device, including the battery device described in any of the above embodiments, wherein the battery device is used to store or provide electrical energy.

[0050] The energy storage device provided in this application has at least the following beneficial effects: the energy storage device provided in this application effectively improves the reliability of the energy storage device by using the battery device described in any of the above embodiments.

[0051] Thirdly, embodiments of this application also provide an energy storage system, including a power conversion device and the aforementioned energy storage device, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

[0052] The energy storage system provided in this application has at least the following beneficial effects: the energy storage system provided in this application effectively improves the reliability of the energy storage system by adopting the energy storage device described in any of the above embodiments.

[0053] Fourthly, embodiments of this application also provide an electrical device, including the battery device, the energy storage device, or the energy storage system described in any of the above embodiments, wherein the battery device is used to store or provide electrical energy.

[0054] The electrical equipment provided in this application embodiment has at least the following beneficial effects: the electrical equipment provided in this application embodiment effectively improves the reliability of the electrical equipment by adopting the battery device, energy storage device or energy storage system described in any of the above embodiments.

[0055] Fifthly, embodiments of this application also provide a charging network, including a charging pile and the aforementioned energy storage device or energy storage system, wherein the energy storage device is used to provide electrical energy to the charging pile.

[0056] The charging network provided in this application embodiment has at least the following beneficial effects: the charging network provided in this application embodiment effectively improves the reliability of the charging network by adopting the above-mentioned energy storage device or energy storage system. Attached Figure Description

[0057] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies 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.

[0058] Figure 1 This is a schematic diagram of the energy storage system provided in the embodiments of this application;

[0059] Figure 2 This is a schematic diagram of the structure of the charging network provided in an embodiment of this application;

[0060] Figure 3 This is a schematic diagram of the vehicle structure provided in an embodiment of this application;

[0061] Figure 4 This is a schematic diagram of the structure of the battery device provided in the embodiments of this application;

[0062] Figure 5 for Figure 4 The diagram shows the exploded structure of the battery device.

[0063] Figure 6 for Figure 5 The diagram shows the structure of the separator in the battery device.

[0064] Figure 7 for Figure 4 The diagram shows the main structural view of the battery device.

[0065] Figure 8 for Figure 7 The diagram shows a cross-sectional view of the battery device along line AA.

[0066] Figure 9 for Figure 8 A magnified structural diagram of point B of the battery device shown;

[0067] Figure 10 A cross-sectional view of the isolation seat along the thickness direction provided in an embodiment of this application;

[0068] Figure 11 This is a schematic diagram of the structure of a battery cell provided in an embodiment of this application.

[0069] The following are the labeling elements in the figure:

[0070] 1. Energy storage devices; 2. Power conversion equipment; 3. Power generation equipment; 4. Charging piles; 5. Connectors;

[0071] 1000, vehicles;

[0072] 100. Battery assembly; 10. Integrated busbar; 11. Isolator; 111. Adhesive discharge structure; 1111. Adhesive discharge groove; 112. First slot; 113. Second slot; 114. Insulator; 115. Metal body; 116. First through hole; 117. Second through hole; 12. Busbar; 13. Sampling component; 20. Limiting assembly; 21. First limiting component; 22. Second limiting component; 23. Third limiting component; 24. Fourth limiting component; 30. Battery cell; 31. First surface; 32. Second surface; 33. Top surface; 34. Bottom surface; 35. First electrode terminal; 36. Second electrode terminal; 40. Support component; 50. Heat exchanger;

[0073] 200. Controller;

[0074] 300. Motor. Detailed Implementation

[0075] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0076] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, and are for ease of description only, not to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. 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 technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0077] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of the various components shown in the accompanying drawings in the embodiments of this application are merely illustrative and should not constitute any limitation on this application.

[0078] With technological advancements, the battery industry has developed rapidly, and the market share and usage frequency of battery devices are increasing. A battery device includes an integrated busbar and multiple battery cells. The integrated busbar includes an isolation base and multiple busbars. The busbars are electrically connected to the electrode terminals of the battery cells to connect multiple battery cells in series, parallel, or series-parallel connections. The isolation base is mounted on the multiple battery cells, and the multiple busbars are mounted on the isolation base to support and insulate each busbar.

[0079] In related technologies, battery cells are prone to expansion during charging and discharging. When one or more battery cells expand, the expanded battery cells will squeeze other battery cells, causing the electrode terminals of the battery cells to shift relative to the corresponding busbars. As the shift increases, the connection between the electrode terminals and the busbars is prone to breakage, which will cause the battery device to malfunction and is not conducive to improving the reliability of the battery device.

[0080] Based on the above considerations, in order to reduce the risk of breakage at the connection between the electrode terminals and the busbar, the first limiting member and the second limiting member in the battery device provided in this application embodiment are respectively disposed on opposite sides of the battery cell group along the first direction to limit the position of the battery cells in the battery cell group. The isolation seat is connected between the first limiting member and the second limiting member, so that the isolation seat can withstand at least part of the compressive force exerted on the first limiting member and the second limiting member when the battery cell expands, and more effectively limit the position of the battery cells in the battery cell group. In this way, the positional displacement of the battery cells relative to the integrated busbar when the battery cells expand can be improved, thereby effectively reducing the risk of breakage at the electrical connection between each battery cell and the corresponding busbar, and effectively improving the reliability of the battery device.

[0081] The battery device provided in this application is applicable to various electrical devices and energy storage devices that use battery devices.

[0082] Electrical equipment can include, but is not limited to, vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools. 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. Spacecraft include airplanes, rockets, space shuttles, and spacecraft. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. 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.

[0083] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0084] Please see Figure 3 , Figure 3 This is a schematic diagram of the structure of a vehicle 1000 provided in an embodiment of this application. A battery device 100 is disposed inside the vehicle 1000, and the battery device 100 may be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery to supply power to the motor 300, for example, to meet the power requirements of the vehicle 1000 during starting, navigation, and driving.

[0085] In some embodiments, the battery device 100 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.

[0086] Energy storage device 1 can be used in battery swapping stations, energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage device 1 may include one or more battery clusters to provide voltage and capacity. A battery cluster may include multiple battery devices 100, which are connected in series via a busbar to increase the voltage of energy storage device 1. When energy storage device 1 includes multiple battery clusters, the battery clusters are connected in parallel to increase the capacity of energy storage device 1. Energy storage device 1 can store electrical energy as needed and output electrical energy when appropriate. For example, energy storage device 1 can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours.

[0087] In some embodiments, the energy storage device 1 is an energy storage container or an energy storage cabinet.

[0088] In some embodiments, the energy storage device 1 may include a cabinet and one or more battery clusters, with the battery clusters housed in the cabinet.

[0089] In some embodiments, the energy storage device 1 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.

[0090] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 100 via pipelines for regulating the temperature of the individual battery cells 30.

[0091] 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 an auxiliary battery management unit and a fusion switch.

[0092] As an example, the central control module can serve as the battery management unit of energy storage device 1, used to monitor and manage energy storage device 1. The central control module can monitor information such as current, voltage, power, state of charge, or temperature of energy storage device 1. For example, it can control the charging and discharging current and voltage of energy storage device 1. As an example, the central control module includes modules such as an insulation monitoring module, a main battery management unit, and an Ethernet and fiber optic conversion module.

[0093] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in the energy storage system.

[0094] As an example, the power distribution module can be used to distribute power to the modules in the energy storage device 1 that require electricity.

[0095] Please see Figure 1 , Figure 1 This is a schematic diagram of the energy storage system provided in an embodiment of this application. The energy storage system provided in this application can be any power system that requires the use of energy storage device 1. The energy storage system may include one or more energy storage devices 1 and a power conversion device 2, wherein the power conversion device 2 is used to connect between the power generation device 3 and the energy storage device 1. The power generation device 3 is used to generate electrical energy, and the electrical energy generated by the power generation device 3 can be stored in the energy storage device 1 through the power conversion device 2. As an example, the power generation device 3 may specifically be a solar panel, a hydroelectric power generation device 3, a thermal power generation device 3, a wind power generation device 3, etc. The specific type of the power generation device 3 is not limited in this application.

[0096] Please see Figure 2 , Figure 2This is a schematic diagram of the charging network provided in an embodiment of this application. The charging network provided in this embodiment can be any charging system that requires the use of the energy storage device 1. The charging network may include the energy storage device 1 and the charging pile 4. The charging pile 4 is electrically connected to the energy storage device 1, and the energy storage device 1 is used to provide electrical energy to the charging pile 4. The charging pile 4 is electrically connected to the battery device 100 in the energy storage device 1 via a cable. The battery device 100 can provide its stored electrical energy to the charging pile 4. The charging pile 4 has one or more connectors 5, which are used to connect to electrical equipment (such as a vehicle 1000) so as to replenish the energy of the electrical equipment.

[0097] The technical solutions provided in the embodiments of this application will be described below with reference to the accompanying drawings.

[0098] Firstly, please refer to the following: Figures 4 to 9 This application provides a battery device 100, including a limiting component 20, an integrated busbar 10, and a plurality of battery cells 30. The plurality of battery cells 30 are arranged sequentially along a first direction to form a battery cell group. Each battery cell 30 has a first surface 31, which is the surface with the largest area among all the sides of the battery cell 30. The first direction is perpendicular to the first surface 31. The limiting component 20 includes a first limiting member 21 and a second limiting member 22, which are respectively disposed on opposite sides of the battery cell group along the first direction. The integrated busbar 10 includes an isolation seat 11 disposed on one side of the battery cell group along a second direction and a plurality of busbars 12 disposed on the isolation seat 11. The isolation seat 11 is connected between the first limiting member 21 and the second limiting member 22. The plurality of busbars 12 are used to electrically connect the plurality of battery cells 30. The second direction is perpendicular to the first direction.

[0099] First, it should be noted that the battery device 100 has a first direction, a second direction, and a third direction, such as... Figure 4 and Figure 5 As shown, the first direction can be Figure 4 and Figure 5 The X direction shown is the length direction of the battery device 100. The second direction can be... Figure 4 and Figure 5 The Z direction shown is the height direction of the battery device 100. A third direction can be... Figure 4 and Figure 5 The Y direction shown is the width direction of the battery device 100.

[0100] A single battery cell 30 is the smallest unit for storing electrical energy. Multiple battery cells 30 are arranged sequentially along a first direction to form a battery cell group. Multiple battery cells 30 in a battery cell group can be connected in series, parallel, or a series-parallel connection. A single battery cell 30 can be a rechargeable battery or a primary battery. A rechargeable battery is a battery cell 30 that can be recharged to activate its active materials and continue to be used after being discharged. A primary battery is a battery cell 30 that cannot be recharged to activate its active materials and continue to be used after being discharged. The battery cell 30 can also be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-metal hydride battery cell, a nickel-cadmium battery cell, or a lead-acid battery cell.

[0101] In some embodiments, the battery cell 30 may include a housing, an electrode assembly, and electrode terminals.

[0102] The housing may include a casing and end caps. The casing is a component that provides an internal environment for the battery cell 30, wherein the internal environment can accommodate electrode assemblies. The casing may be a separate component with an opening. The internal environment of the battery cell 30 is formed by covering the opening with the end cap, and the electrode assemblies are housed within this internal environment. Specifically, the casing and end caps may form a common connection surface before other components are inserted into the casing. When it is necessary to encapsulate the interior of the casing, the end caps are then placed over the opening of the casing. The casing material may be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0103] An end cap is a component that covers the opening of the housing to isolate the internal environment of the battery cell 30 from the external environment. The shape of the end cap can be adapted to the shape of the housing to fit the housing. In some embodiments, the end cap can be made of a material with a certain degree of hardness and strength, so that the end cap is not easily deformed when subjected to compression and impact, enabling the battery cell 30 to have higher structural strength and improve safety performance. Of course, this embodiment does not limit the material of the end cap to a single material, and the material of the end cap can be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0104] In some embodiments, the end cap may also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 30 reaches a threshold.

[0105] Electrode components are the parts in the battery cell 30 where electrochemical reactions occur. A battery cell 30 may contain one or more electrode components. Electrode components are mainly manufactured from positive electrode sheets, negative electrode sheets, and separators using winding or lamination processes.

[0106] In some embodiments, the electrode assembly is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0107] In some embodiments, the electrode assembly has a stacked structure.

[0108] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0109] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0110] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0111] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0112] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0113] During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrode plates. A separator is placed between the positive and negative electrode plates to prevent short circuits while allowing active ions to pass through.

[0114] The positive electrode may include a positive current collector and a positive active material disposed on at least one surface of the positive current collector. The negative electrode may include a negative current collector and a negative active material disposed on at least one surface of the negative current collector.

[0115] In some embodiments, the battery cell 30 further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not impose specific limitations on the type of electrolyte; it can be selected according to requirements. The electrolyte can be liquid, gel, or solid.

[0116] In some embodiments, the electrode assembly has tabs that can conduct current from the electrode assembly. The tabs include a positive tab and a negative tab, with the positive tab electrically connected to a positive electrode plate and the negative tab electrically connected to a negative electrode plate.

[0117] Electrode terminals are components electrically connected to the electrode assembly for outputting or inputting electrical energy into the battery cell 30. Electrode terminals may be located on an end cap. One portion of the electrode terminal extends into the internal environment of the battery cell 30 and is directly or indirectly connected to the tabs of the electrode assembly, while the other portion of the electrode terminal is exposed in the external environment of the battery cell 30 and connected to the busbar 12. Electrode terminals can have a columnar structure, such as a cylindrical or prismatic structure, or a plate-like structure, such as a circular or square plate. Other irregular three-dimensional structures are also possible, without specific limitations. Electrode terminals can be made of one or more metal materials, including, but not limited to, copper, aluminum, nickel, zinc, and iron.

[0118] In some embodiments, the electrode terminals include a first electrode terminal 35 and a second electrode terminal 36, wherein the first electrode terminal 35 is electrically connected to the positive electrode ear and the second electrode terminal 36 is electrically connected to the negative electrode ear.

[0119] In some embodiments, the battery cell 30 is a prismatic battery cell with a top surface 33, a bottom surface 34 and multiple side surfaces. The top surface 33 and the bottom surface 34 are arranged opposite to each other along the second direction, and the multiple side surfaces are disposed between the top surface 33 and the bottom surface 34. The multiple side surfaces include two first surfaces 31 and two second surfaces 32. The two first surfaces 31 are arranged opposite to each other along the first direction, and the two second surfaces 32 are arranged opposite to each other along the third direction. The first surface 31 is the surface with the largest area among the multiple side surfaces.

[0120] Of course, in other embodiments, the battery cell 30 can also be a blade-shaped battery cell, a pouch battery cell, etc.

[0121] The limiting assembly 20 is used to limit the position of the battery cell 30, wherein the first limiting member 21 and the second limiting member 22 are used to limit the position of the battery cell 30 along the first direction. The first limiting member 21 and the second limiting member 22 are respectively disposed on opposite sides of the battery cell group along the first direction, that is, the first limiting member 21 is disposed on one side of the battery cell group along the first direction, and the second limiting member 22 is disposed on the other side of the battery cell group along the first direction. As an example, the first limiting member 21 abuts against one side of the battery cell group along the first direction, and the second limiting member 22 abuts against the other side of the battery cell group along the first direction. The material of the first limiting member 21 can be, but is not limited to, metal, plastic, ceramic, etc. The material of the second limiting member 22 can be, but is not limited to, metal, plastic, ceramic, etc.

[0122] In some embodiments, the battery device 100 is a battery module, which includes a first end cover, a second end cover, and a plurality of battery cells 30. The plurality of battery cells 30 are arranged sequentially along a first direction to form a battery cell group. The first end cover and the second end cover are respectively disposed on opposite sides of the battery cell group along the first direction. The first end cover is the first limiting member 21 mentioned above, and the second end cover is the second limiting member 22 mentioned above.

[0123] In other embodiments, the battery device 100 is a battery pack, which includes a housing and a plurality of battery cells 30. The plurality of battery cells 30 are arranged sequentially along a first direction to form a battery cell group. The housing includes a first expansion beam and a second expansion beam, which are respectively disposed on opposite sides of the battery cell group along the first direction. The first expansion beam is the aforementioned first limiting member 21, and the second expansion beam is the aforementioned second limiting member 22.

[0124] The integrated busbar 10 can be used to electrically connect multiple battery cells 30, so that the multiple battery cells 30 can be connected in series, in parallel or in series-parallel connection. The integrated busbar 10 can also be used to sample data from the battery cells 30, such as collecting voltage data, current data, temperature data, etc. of the battery cells 30.

[0125] The isolation seat 11 is the supporting body of the integrated busbar 10. The isolation seat 11 supports multiple busbars 12 and other components of the integrated busbar 10, and also serves to insulate and separate the multiple busbars 12. The isolation seat 11 is disposed on one side of the battery cell pack along the second direction. As an example, the isolation seat 11 is disposed on the top surface 33 of multiple battery cells 30. The isolation seat 11 can be made entirely of insulating material or partially of insulating material; for example, the isolation seat 11 can be made of a composite of insulating material and metal material.

[0126] In some embodiments, the isolation seat 11 may be a plate-like structure.

[0127] The isolation seat 11 is connected between the first limiting member 21 and the second limiting member 22. Specifically, one end of the isolation seat 11 along the first direction is connected to the first limiting member 21, and the other end of the isolation seat 11 along the first direction is connected to the second limiting member 22. The connection method between the isolation seat 11 and the first limiting member 21 can be, but is not limited to, fastening, snap-fitting, bonding, welding, etc. The connection method between the isolation seat 11 and the second limiting member 22 can be, but is not limited to, fastening, snap-fitting, bonding, welding, etc.

[0128] Multiple busbars 12 are used to connect multiple battery cells 30 in series, in parallel, or in a series-parallel connection.

[0129] In some embodiments, the first busbar 12 is electrically connected to the first electrode terminal 35 of the first battery cell 30 and the second electrode terminal 36 of the second battery cell 30, the second busbar 12 is electrically connected to the second electrode terminal 36 of the second battery cell 30 and the first electrode terminal 35 of the third battery cell 30, the third busbar 12 is electrically connected to the second electrode terminal 36 of the third battery cell 30 and the first electrode terminal 35 of the fourth battery cell 30, and so on, so as to connect multiple battery cells 30 in series.

[0130] In other embodiments, a first busbar 12 is electrically connected to the first electrode terminal 35 of the first battery cell 30 and the first electrode terminal 35 of the second battery cell 30; a second busbar 12 is electrically connected to the second electrode terminal 36 of the first battery cell 30 and the second electrode terminal 36 of the second battery cell 30; a third busbar 12 is electrically connected to the first electrode terminal 35 of the second battery cell 30 and the first electrode terminal 35 of the third battery cell 30; a fourth busbar 12 is electrically connected to the second electrode terminal 36 of the second battery cell 30 and the second electrode terminal 36 of the third battery cell 30, and so on, so as to connect multiple battery cells 30 in parallel.

[0131] In some other embodiments, a portion of the busbars 12 connects a portion of the battery cells 30 in series, and another portion of the busbars 12 connects another portion of the battery cells 30 in parallel, so as to connect multiple battery cells 30 in series and parallel.

[0132] In some embodiments, the isolation seat 11 has a plurality of first through holes 116, and the busbar 12 is electrically connected to the corresponding electrode terminal through the corresponding first through holes 116.

[0133] In some embodiments, the isolation seat 11 is also provided with a plurality of second through holes 117, and the plurality of second through holes 117 are provided in a one-to-one correspondence with the pressure relief mechanism of the plurality of battery cells 30.

[0134] In some embodiments, the integrated busbar 10 further includes a sampling element 13, which is disposed on the isolation seat 11. The sampling element 13 includes a circuit board and a plurality of electrical connectors, which are all electrically connected to the circuit board and are electrically connected to a plurality of busbars 12 in a one-to-one correspondence.

[0135] The first limiting member 21 and the second limiting member 22 in the battery device 100 provided in this application embodiment are respectively disposed on opposite sides of the battery cell group along the first direction to limit the position of the battery cell 30 in the battery cell group. The isolation seat 11 is connected between the first limiting member 21 and the second limiting member 22, so that the isolation seat 11 can withstand at least part of the compressive force exerted by the battery cell 30 on the first limiting member 21 and the second limiting member 22 when the battery cell 30 expands. This more effectively limits the position of the battery cell 30 in the battery cell group. In this way, the positional displacement of the battery cell 30 relative to the integrated busbar 10 when the battery cell 30 expands can be improved, thereby effectively reducing the risk of breakage at the electrical connection between each battery cell 30 and the corresponding busbar 12, and effectively improving the reliability of the battery device 100.

[0136] In some embodiments of this application, please refer to Figure 5 The limiting component 20 also includes a third limiting member 23 and a fourth limiting member 24. The third limiting member 23 and the fourth limiting member 24 are respectively disposed on opposite sides of the battery cell group along a third direction. The third limiting member 23 is connected between one side of the first limiting member 21 and one side of the second limiting member 22, and the fourth limiting member 24 is connected between the other side of the first limiting member 21 and the other side of the second limiting member 22. The third direction is perpendicular to the first direction and the second direction.

[0137] The third limiting member 23 and the fourth limiting member 24 provide tensile force to the first limiting member 21 and the second limiting member 22 to counteract the compressive force exerted on the first limiting member 21 and the second limiting member 22 when the battery cell 30 expands. The third limiting member 23 and the fourth limiting member 24 also limit the position of the battery cell 30 along the aforementioned third direction. The material of the third limiting member 23 can be, but is not limited to, metal, plastic, ceramic, etc. The material of the fourth limiting member 24 can be, but is not limited to, metal, plastic, ceramic, etc.

[0138] The third limiting member 23 and the fourth limiting member 24 are respectively disposed on opposite sides of the battery cell group along the third direction. That is, the third limiting member 23 is disposed on one side of the battery cell group along the third direction, and the fourth limiting member 24 is disposed on the other side of the battery cell group along the third direction. As an example, the third limiting member 23 abuts against one side of the battery cell group along the third direction, and the fourth limiting member 24 abuts against the other side of the battery cell group along the third direction.

[0139] The third limiting member 23 is connected between one side of the first limiting member 21 and one side of the second limiting member 22. Specifically, one end of the third limiting member 23 along the first direction is connected to the side of the first limiting member 21 along the third direction opposite to the fourth limiting member 24, and the other end of the third limiting member 23 along the first direction is connected to the side of the second limiting member 22 along the third direction opposite to the fourth limiting member 24. The connection method between the third limiting member 23 and the first limiting member 21 can be, but is not limited to, fastening, snap-fitting, bonding, welding, etc. The connection method between the third limiting member 23 and the second limiting member 22 can be, but is not limited to, fastening, snap-fitting, bonding, welding, etc.

[0140] The fourth limiting member 24 is connected between the other side of the first limiting member 21 and the other side of the second limiting member 22. Specifically, one end of the fourth limiting member 24 along the first direction is connected to the side of the first limiting member 21 along the third direction opposite to the third limiting member 23, and the other end of the fourth limiting member 24 along the first direction is connected to the side of the second limiting member 22 along the third direction opposite to the third limiting member 23. The connection method between the fourth limiting member 24 and the first limiting member 21 can be, but is not limited to, fastening, snap-fitting, bonding, welding, etc. The connection method between the fourth limiting member 24 and the second limiting member 22 can be, but is not limited to, fastening, snap-fitting, bonding, welding, etc.

[0141] In some embodiments, the battery device 100 is a battery module, which includes a first end cover, a second end cover, a first side plate, a second side plate, and a plurality of battery cells 30. The plurality of battery cells 30 are arranged sequentially along a first direction to form a battery cell group. The first end cover and the second end cover are respectively disposed on opposite sides of the battery cell group along the first direction. The first side plate and the second side plate are respectively disposed on opposite sides of the battery cell group along a third direction. The first end cover is the first limiting member 21, the second end cover is the second limiting member 22, the first side plate is the third limiting member 23, and the second side plate is the fourth limiting member 24.

[0142] In other embodiments, the battery device 100 is a battery pack, which includes a housing and a plurality of battery cells 30. The plurality of battery cells 30 are arranged sequentially along a first direction to form a battery cell group. The housing includes a first expansion beam, a second expansion beam, a first side beam, a second side beam, and a plurality of battery cells 30. The plurality of battery cells 30 are arranged sequentially along the first direction to form a battery cell group. The first expansion beam and the second expansion beam are respectively disposed on opposite sides of the battery cell group along the first direction. The first side beam and the second side beam are respectively disposed on opposite sides of the battery cell group along a third direction. The first expansion beam is the first limiting member 21 mentioned above, the second expansion beam is the second limiting member 22 mentioned above, the first side beam is the third limiting member 23 mentioned above, and the second side beam is the fourth limiting member 24 mentioned above.

[0143] By adopting the above technical solution, the third limiting member 23 and the fourth limiting member 24 can jointly withstand at least part of the compressive force exerted by the battery cell 30 on the first limiting member 21 and the second limiting member 22 when the battery cell 30 expands, thus more effectively limiting the position of the battery cell 30 in the battery cell group. This further improves the situation where the battery cell 30 is offset relative to the integrated busbar 10 when it expands, further reduces the risk of breakage at the electrical connection between each battery cell 30 and the corresponding busbar 12, and further improves the reliability of the battery device 100.

[0144] In some embodiments of this application, the third limiting member 23 is a non-metallic part, that is, the third limiting member 23 is made of non-metallic material.

[0145] In some embodiments, the third limiting member 23 is made of plastic.

[0146] In other embodiments, the third limiting member 23 is made of ceramic.

[0147] In some other embodiments of this application, the fourth limiting member 24 is a non-metallic member, that is, the fourth limiting member 24 is made of non-metallic material.

[0148] In some embodiments, the fourth limiting member 24 is made of plastic.

[0149] In other embodiments, the fourth limiting member 24 is made of ceramic.

[0150] In some other embodiments of this application, the third limiting member 23 is a non-metallic member, and the fourth limiting member 24 is a non-metallic member.

[0151] By adopting the above technical solution, while effectively limiting the position of the battery cells 30 in the battery cell pack, not only is the weight of the battery device 100 effectively reduced and the weight energy density of the battery device 100 improved, but the production cost of the battery device 100 is also effectively reduced.

[0152] Please refer to some embodiments of this application as well. Figure 4 , Figure 5 , Figure 8 and Figure 9 The battery device 100 also includes a support member 40, which is disposed on the side of the battery cell pack facing away from the isolation seat 11 to support the battery cell pack. The first limiting member 21 and the second limiting member 22 are both connected to the support member 40.

[0153] The support member 40 is disposed on the side of the battery cell pack facing away from the isolation seat 11 to support the battery cell pack. The support member 40 also supports the limiting assembly 20 and the integrated busbar 10. The support member 40 can be a one-piece molded component or it can be assembled from multiple parts.

[0154] In some embodiments, the support member 40 has a plate-like structure.

[0155] Both the first limiting member 21 and the second limiting member 22 are connected to the support member 40, meaning that both the first limiting member 21 and the second limiting member 22 are fixed to the support member 40. The connection method between the first limiting member 21 and the support member 40 can be, but is not limited to, fastening, bonding, welding, etc. The connection method between the second limiting member 22 and the support member 40 can be, but is not limited to, fastening, bonding, welding, etc.

[0156] In some embodiments, the battery device 100 further includes a first connector and a second connector. The first connector connects the first limiting member 21 and the support member 40, and the second connector connects the second limiting member 22 and the support member 40. The first connector may be, but is not limited to, bolts, screws, rivets, and pins. The second connector may be, but is not limited to, bolts, screws, rivets, and pins.

[0157] By adopting the above technical solution, the support member 40 can withstand at least part of the compressive force exerted by the battery cell 30 on the first limiting member 21 and the second limiting member 22 when the battery cell 30 expands, and more effectively restrict the position of the battery cell 30 in the battery cell group, thereby further improving the situation where the battery cell 30 is offset relative to the integrated busbar 10 when it expands, further reducing the risk of breakage at the electrical connection between each battery cell 30 and the corresponding busbar 12, and thus further improving the reliability of the battery device 100.

[0158] In some embodiments of this application, please refer to Figure 5 The third limiting member 23, the fourth limiting member 24 and the supporting member 40 are integrally formed components.

[0159] In this embodiment, the third limiting member 23, the fourth limiting member 24, and the supporting member 40 are formed into a single unit using an integral molding process. The integral molding process can be, but is not limited to, injection molding, casting, stamping, etc.

[0160] By adopting the above technical solution, the third limiting member 23 and the fourth limiting member 24 are fixed relative to the support member 40, which more effectively restricts the position of the battery cell 30 in the battery cell group, thereby further improving the situation where the position of the battery cell 30 is offset relative to the integrated busbar 10 when it expands, further reducing the risk of breakage at the electrical connection between each battery cell 30 and the corresponding busbar 12, and thus further improving the reliability of the battery device 100.

[0161] In some embodiments of this application, the third limiting member 23, the fourth limiting member 24, and the supporting member 40 are injection-molded components.

[0162] In this embodiment, the materials of the third limiting member 23, the fourth limiting member 24, and the support member 40 are all plastic, and the third limiting member 23, the fourth limiting member 24, and the support member 40 are formed into a whole by injection molding.

[0163] By adopting the above technical solution, not only is the weight of the battery device 100 effectively reduced and the weight energy density of the battery device 100 improved, but the production cost of the battery device 100 is also effectively reduced.

[0164] Please refer to some embodiments of this application as well. Figure 5 and Figure 9 The battery device 100 also includes a heat exchanger 50 disposed on the side of the support member 40 facing the battery cell 30, and the plurality of battery cells 30 are connected to the heat exchanger 50.

[0165] In some embodiments, the heat exchanger 50 has a heat exchange channel for circulating a heat exchange medium. During the flow of the heat exchange medium in the heat exchange channel, it can exchange heat with the battery cell 30 to regulate the temperature of the battery cell 30.

[0166] In some embodiments, the heat exchanger 50 has a plate-like structure, and the heat exchanger 50 is stacked on the support 40 and fixedly connected to the support 40. Multiple battery cells 30 are connected to the heat exchanger 50.

[0167] The connection between the battery cell 30 and the heat exchanger 50 can be, but is not limited to, fastening, bonding, welding, etc.

[0168] By adopting the above technical solution, the position of the battery cell 30 is more effectively restricted, thereby further improving the positional offset of the battery cell 30 relative to the integrated busbar 10, further reducing the risk of breakage at the electrical connection between each battery cell 30 and the corresponding busbar 12, and thus further improving the reliability of the battery device 100.

[0169] In some embodiments of this application, multiple battery cells 30 are bonded to the heat exchanger 50.

[0170] Understandably, the side of the multiple battery cells 30 facing away from the isolation seat 11 is bonded to the heat exchanger 50, that is, the bottom surface 34 of the multiple battery cells 30 is bonded to the heat exchanger 50, so that the multiple battery cells 30 are fixed on the heat exchanger 50.

[0171] As an example, an adhesive can be applied to the bottom surface 34 of each battery cell 30 to bond the battery cell 30 to the heat exchanger 50.

[0172] As an example, double-sided tape can be applied to the bottom surface 34 of each battery cell 30 to bond the battery cell 30 to the heat exchanger 50.

[0173] By adopting the above technical solution, it is easy to fix multiple battery cells 30 on the heat exchanger 50.

[0174] In some embodiments of this application, the support 40 has a heat exchange channel for circulating a heat exchange medium.

[0175] By adopting the above technical solution, the heat exchange medium can exchange heat with the battery cell 30 during the flow of the heat exchange channel, so as to regulate the temperature of the battery cell 30 and keep the temperature of the battery cell 30 within a suitable range, thereby effectively improving the charging and discharging performance of the battery device 100.

[0176] In some embodiments of this application, the isolation seat 11 is connected to the battery cell pack.

[0177] Understandably, the isolation seat 11 can be connected to one or more battery cells 30 in the battery cell group. For example, the isolation seat 11 is connected to each battery cell 30 in the battery cell group.

[0178] The connection between the isolation seat 11 and the battery cell 30 can be, but is not limited to, bonding, welding, snap-fit ​​connection, etc.

[0179] By adopting the above technical solution, the relative position between the isolation seat 11 and the battery cell 30 is effectively limited, the positional offset of the battery cell 30 relative to the integrated busbar 10 is further improved, and the risk of breakage at the electrical connection between each battery cell 30 and the corresponding busbar 12 is further reduced, thereby further improving the reliability of the battery device 100.

[0180] In some embodiments of this application, the separator 11 is bonded to the battery cell assembly.

[0181] In some embodiments, the first electrode terminal 35, the second electrode terminal 36, and the pressure relief mechanism are all disposed on the top surface 33 of the battery cell 30. The regions of the top surface 33 of the battery cell 30 located on the outer periphery of the first electrode terminal 35, the regions of the top surface 33 of the battery cell 30 located on the outer periphery of the second electrode terminal 36, and the regions of the top surface 33 of the battery cell 30 located on the outer periphery of the pressure relief mechanism are all bonded to the isolation seat 11.

[0182] As an example, an adhesive can be applied to the top surface 33 of each battery cell 30 to bond the battery cell 30 to the spacer 11.

[0183] As an example, double-sided tape can be applied to the top surface 33 of each battery cell 30 to bond the battery cell 30 to the separator 11.

[0184] By adopting the above technical solution, it is easy to connect the isolation seat 11 to the battery cell pack.

[0185] In some embodiments of this application, please refer to Figure 6 The separator 11 is provided with an adhesive discharge structure 111, which is used to discharge at least part of the adhesive located between the separator 11 and the battery cell group to the side of the separator 11 facing away from the battery cell group.

[0186] In this embodiment, the separator 11 is bonded to the battery cell assembly using an adhesive.

[0187] The adhesive discharge structure 111 is used to discharge at least a portion of the adhesive located between the separator 11 and the battery cell assembly to the side of the separator 11 facing away from the battery cell assembly. That is, during the pressing and bonding process between the separator 11 and the battery cell assembly, excess adhesive can be discharged to the side of the separator 11 facing away from the battery cell assembly through the adhesive discharge structure 111.

[0188] By adopting the above technical solution, the adhesive discharge structure 111 can discharge excess adhesive from the side of the separator 11 facing away from the battery cell assembly, thereby improving the situation where the adhesive flows to the side of the battery cell 30. This effectively reduces the risk of local stress on the battery cell 30 after the adhesive solidifies on the side of the battery cell 30, and further improves the reliability of the battery device 100.

[0189] In some embodiments of this application, please refer to Figure 6 The isolation seat 11 is provided with a glue discharge structure 111, which includes a glue discharge groove 1111 that passes through the opposite sides of the isolation seat 11 along the second direction.

[0190] In some embodiments, the glue removal structure 111 includes a plurality of glue removal grooves 1111, and each battery cell 30 is correspondingly provided with at least one glue removal groove 1111.

[0191] Please refer to the following as an example. Figure 6 and Figure 11 The first electrode terminal 35, the second electrode terminal 36, and the pressure relief mechanism are all disposed on the top surface 33 of the battery cell 30. The pressure relief mechanism is disposed between the first electrode terminal 35 and the second electrode terminal 36. Four glue discharge grooves 1111 are disposed on each part of the separator 11 corresponding to each battery cell 30. One glue discharge groove 1111 is disposed on the side of the first electrode terminal 35 away from the pressure relief mechanism, another glue discharge groove 1111 is disposed between the first electrode terminal 35 and the pressure relief mechanism, another glue discharge groove 1111 is disposed between the second electrode terminal 36 and the pressure relief mechanism, and yet another glue discharge groove 1111 is disposed on the side of the second electrode terminal 36 away from the pressure relief mechanism.

[0192] By adopting the above technical solution, excess adhesive can be quickly discharged from the side of the separator 11 facing away from the battery cell pack, and the structure is simple and easy to implement.

[0193] In some embodiments of this application, the separator 11 includes a separator body and an adhesive barrier structure. The separator body is bonded to the battery cell assembly, and the adhesive barrier structure is disposed on the side of the separator body facing the battery cell assembly. The adhesive barrier structure is used to prevent at least a portion of the adhesive located between the separator body and the battery cell assembly from flowing out to the side of the battery cell 30.

[0194] The isolation body is the main part of the isolation seat 11. The isolation body is bonded to the battery cell group. The busbar 12 and the sampling device 13 are both set on the isolation body.

[0195] The adhesive barrier structure is used to prevent at least a portion of the adhesive located between the separator and the battery cell assembly from flowing out to the side of the battery cell 30. The adhesive barrier structure and the separator can be integrally molded components, for example, the adhesive barrier structure and the separator can be integrally molded using an injection molding process; the adhesive barrier structure and the separator can also be two separate parts connected to form a whole, for example, the adhesive barrier structure and the separator can be bonded together to form a whole.

[0196] In some embodiments, the separator 11 is provided with an adhesive discharge structure 111, which discharges at least a portion of the adhesive located between the separator 11 and the battery cell assembly to the side of the separator 11 facing away from the battery cell assembly. The adhesive blocking structure is used to prevent at least a portion of the adhesive located between the separator body and the battery cell assembly from flowing out to the side of the battery cell 30, so as to further improve the situation of preventing the adhesive from flowing to the side of the battery cell 30, thereby more effectively reducing the risk of local stress on the battery cell 30 after the adhesive solidifies on the side of the battery cell 30.

[0197] By adopting the above technical solution, the adhesive barrier structure can prevent the adhesive from flowing to the side of the battery cell 30, thereby effectively reducing the risk of local stress on the battery cell 30 after the adhesive solidifies on the side of the battery cell 30, and further improving the reliability of the battery device 100.

[0198] In some embodiments of this application, the adhesive barrier structure includes an adhesive barrier strip, which is disposed on the side of the insulating body and abuts against the battery cell assembly.

[0199] In some embodiments, the adhesive barrier structure includes a plurality of adhesive barrier strips, which are disposed in a one-to-one correspondence with a plurality of battery cells 30. The adhesive barrier strips are in a ring shape and are arranged around the top surface 33 of the battery cell 30.

[0200] By adopting the above technical solution, the adhesive can be effectively blocked from flowing to the side of the battery cell 30, and the structure is simple and easy to implement.

[0201] In some embodiments of this application, the battery device 100 further includes a third connector and a fourth connector, the third connector being used to connect the isolation seat 11 and the first limiting member 21, and the fourth connector being used to connect the isolation seat 11 and the second limiting member 22.

[0202] By adopting the above technical solution, it is easy to connect the isolation seat 11 to the first limiting member 21 and the second limiting member 22.

[0203] In some embodiments of this application, the third connector is one of a bolt, screw, rivet, and pin; and / or, the fourth connector is one of a bolt, screw, rivet, and pin.

[0204] By adopting the above technical solution, it is not only convenient to connect the isolation seat 11 to the first limiting member 21 and the second limiting member 22, but also to effectively improve the connection strength between the isolation seat 11 and the first limiting member 21 and the connection strength between the isolation seat 11 and the second limiting member 22.

[0205] In some embodiments of this application, please refer to Figure 9 The isolation seat 11 is snapped together with the first limiting member 21.

[0206] In some embodiments, please refer to the following: Figure 6 and Figure 9 The isolation seat 11 has a first slot 112 at one end near the first limiting member 21 along the first direction. The first limiting member 21 is inserted into the first slot 112 to achieve a snap-fit ​​connection between the isolation seat 11 and the first limiting member 21.

[0207] In other embodiments, the first limiting member 21 is provided with a first slot 112, and the end of the isolation seat 11 close to the first limiting member 21 along the first direction is inserted into the first slot 112 to realize the snap-fit ​​connection between the isolation seat 11 and the first limiting member 21.

[0208] In some other embodiments of this application, the isolation seat 11 is snapped together with the second limiting member 22.

[0209] In some embodiments, please refer to Figure 6 The isolation seat 11 has a second slot 113 at one end near the second limiting member 22 along the first direction. The second limiting member 22 is inserted into the second slot 113 to achieve a snap-fit ​​connection between the isolation seat 11 and the second limiting member 22.

[0210] In other embodiments, the second limiting member 22 is provided with a second slot 113, and the end of the isolation seat 11 close to the second limiting member 22 along the first direction is inserted into the second slot 113 to realize the snap-fit ​​connection between the isolation seat 11 and the second limiting member 22.

[0211] In some other embodiments of this application, the isolation seat 11 is snapped together with the first limiting member 21 and the isolation seat 11 is snapped together with the second limiting member 22.

[0212] In some embodiments, please refer to Figure 9 The battery device 100 also includes a third connector and a fourth connector. The end of the isolation seat 11 that is close to the first limiting member 21 along the first direction is connected to the first limiting member 21 through the third connector, and the end of the isolation seat 11 that is close to the first limiting member 21 along the first direction is snap-fitted to the first limiting member 21. The end of the isolation seat 11 that is close to the second limiting member 22 along the first direction is connected to the second limiting member 22 through the fourth connector, and the end of the isolation seat 11 that is close to the second limiting member 22 along the first direction is snap-fitted to the second limiting member 22.

[0213] By adopting the above technical solution, it is easy to connect the isolation seat 11 to the first limiting member 21 and the second limiting member 22.

[0214] In some embodiments of this application, please refer to Figure 10 The isolation seat 11 includes an insulator 114 and a metal body 115. The insulator 114 covers the outer surface of the metal body 115, and the metal body 115 is connected between the first limiting member 21 and the second limiting member 22.

[0215] Understandably, insulator 114 is made of insulating material, which may be, but is not limited to, plastic, rubber, silicone, ceramic, etc. Metal body 115 is made of metal material, which may be, but is not limited to, aluminum, aluminum alloy, copper, iron, stainless steel, etc.

[0216] Insulator 114 covers the outer surface of metal body 115. As an example, insulator 114 can be directly formed on the outer surface of metal body 115. For example, insulator 114 can be formed on the outer surface of metal body 115 by injection molding.

[0217] In some embodiments, the battery device 100 further includes a first connector and a second connector. The insulating base 11 has a first connecting hole and a second connecting hole, both of which penetrate the insulator 114 and the metal body 115. The first connector passes through the first connecting hole and is connected to the first limiting member 21 to connect the metal body 115 to the first limiting member 21. The second connector passes through the second connecting hole and is connected to the second limiting member 22 to connect the metal body 115 to the second limiting member 22. The first connector can be, but is not limited to, bolts, screws, rivets, and pins. The second connector can be, but is not limited to, bolts, screws, rivets, and pins.

[0218] By adopting the above technical solution, the structural strength of the isolation seat 11 is effectively improved, enabling the isolation seat 11 to withstand more of the compressive force exerted by the battery cell 30 on the first limiting member 21 and the second limiting member 22 when the battery cell 30 expands. This further restricts the position of the battery cell 30 in the battery cell group, further improves the positional offset of the battery cell 30 relative to the integrated busbar 10, thereby further reducing the risk of breakage at the electrical connection between each battery cell 30 and the corresponding busbar 12, and further improving the reliability of the battery device 100.

[0219] In some embodiments of this application, the first limiting member 21 is a non-metallic part, that is, the first limiting member 21 is made of non-metallic material.

[0220] In some embodiments, the first limiting member 21 is made of plastic.

[0221] In some other embodiments, the first limiting member 21 is made of ceramic.

[0222] In some other embodiments of this application, the second limiting member 22 is a non-metallic part, that is, the second limiting member 22 is made of non-metallic material.

[0223] In some embodiments, the second limiting member 22 is made of plastic.

[0224] In other embodiments, the second limiting member 22 is made of ceramic.

[0225] In some other embodiments of this application, the first limiting member 21 is a non-metallic member, and the second limiting member 22 is a non-metallic member.

[0226] By adopting the above technical solution, while effectively limiting the position of the battery cells 30 in the battery cell pack, not only is the weight of the battery device 100 effectively reduced and the weight energy density of the battery device 100 improved, but the production cost of the battery device 100 is also effectively reduced.

[0227] Secondly, embodiments of this application also provide an energy storage device 1, including the battery device 100 described in any of the above embodiments, the battery device 100 being used to store or provide electrical energy.

[0228] The energy storage device 1 provided in this application embodiment effectively improves the reliability of the energy storage device 1 by adopting the battery device 100 described in any of the above embodiments.

[0229] Thirdly, please refer to Figure 1 This application also provides an energy storage system, including a power conversion device and the aforementioned energy storage device 1, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device 1.

[0230] The energy storage system provided in this application embodiment effectively improves the reliability of the energy storage system by employing the energy storage device 1 described in any of the above embodiments.

[0231] Fourthly, please refer to Figure 3 This application also provides an electrical device, including the battery device 100, the energy storage device 1, or the energy storage system described in any of the above embodiments, wherein the battery device 100 is used to store or provide electrical energy.

[0232] The electrical equipment provided in this application embodiment effectively improves the reliability of the electrical equipment by employing the battery device 100, the energy storage device 1, or the energy storage system described in any of the above embodiments.

[0233] Fifthly, please refer to Figure 2 This application embodiment also provides a charging network, including a charging pile 4 and the above-described energy storage device 1 or an energy storage system as described above, wherein the energy storage device 1 is used to provide electrical energy to the charging pile 4.

[0234] The charging network provided in this application embodiment effectively improves the reliability of the charging network by using the above-described energy storage device 1 or energy storage system.

[0235] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, The battery device includes: Multiple battery cells are arranged sequentially along a first direction to form a battery cell group. Each battery cell has a first surface, which is the surface with the largest area among all the sides of the battery cell. The first direction is perpendicular to the first surface. The limiting component includes a first limiting member and a second limiting member, wherein the first limiting member and the second limiting member are respectively disposed on opposite sides of the battery cell group along the first direction; An integrated busbar includes an isolation seat disposed on one side of the battery cell group along a second direction and a plurality of busbars disposed on the isolation seat. The isolation seat is connected between a first limiting member and a second limiting member. The plurality of busbars are used to electrically connect a plurality of battery cells. The second direction is perpendicular to the first direction.

2. The battery device according to claim 1, characterized in that, The limiting component further includes a third limiting member and a fourth limiting member, which are respectively disposed on opposite sides of the battery cell group along a third direction. The third limiting member is connected between one side of the first limiting member and one side of the second limiting member, and the fourth limiting member is connected between the other side of the first limiting member and the other side of the second limiting member. The third direction is perpendicular to the first direction and the second direction.

3. The battery device according to claim 2, characterized in that, The third limiting member and / or the fourth limiting member are non-metallic parts.

4. The battery device according to claim 1, characterized in that, The battery device further includes a support member disposed on the side of the battery cell assembly facing away from the isolation seat to support the battery cell assembly. The first limiting member and the second limiting member are both connected to the support member.

5. The battery device according to claim 4, characterized in that, The battery device further includes a first connector and a second connector, wherein the first connector is used to connect the first limiting member and the supporting member, and the second connector is used to connect the second limiting member and the supporting member.

6. The battery device according to claim 5, characterized in that, The first connecting member is one of bolts, screws, rivets, and catches; and / or, The second connector is one of bolts, screws, rivets, and pins.

7. The battery device according to claim 4, characterized in that, The limiting component further includes a third limiting member and a fourth limiting member, wherein the third limiting member, the fourth limiting member, and the supporting member are integrally formed components.

8. The battery device according to claim 7, characterized in that, The third limiting member, the fourth limiting member, and the supporting member are injection molded components.

9. The battery device according to any one of claims 4-8, characterized in that, The battery device further includes a heat exchanger disposed on the side of the support facing the battery cell, and a plurality of battery cells are connected to the heat exchanger.

10. The battery device according to claim 9, characterized in that, Multiple battery cells are bonded to the heat exchanger.

11. The battery device according to any one of claims 4-8, characterized in that, The support has heat exchange channels for circulating heat exchange medium.

12. The battery device according to any one of claims 1-11, characterized in that, The isolation bracket is connected to the battery cell assembly.

13. The battery device according to claim 12, characterized in that, The separator is bonded to the battery cell assembly.

14. The battery device according to claim 13, characterized in that, The separator is provided with an adhesive discharge structure, which is used to discharge at least a portion of the adhesive located between the separator and the battery cell assembly to the side of the separator facing away from the battery cell assembly.

15. The battery device according to claim 13, characterized in that, The isolation seat is provided with a glue discharge structure, which includes a glue discharge groove that extends through the opposite sides of the isolation seat along the second direction.

16. The battery device according to any one of claims 13-15, characterized in that, The insulating base includes an insulating body and an adhesive-blocking structure. The insulating body is bonded to the battery cell assembly. The adhesive-blocking structure is disposed on the side of the insulating body facing the battery cell assembly. The adhesive-blocking structure is used to prevent at least a portion of the adhesive located between the insulating body and the battery cell assembly from flowing out to the side of the battery cell.

17. The battery device according to claim 16, characterized in that, The adhesive barrier structure includes an adhesive barrier strip, which is disposed on the side of the insulating body and abuts against the battery cell assembly.

18. The battery device according to any one of claims 1-17, characterized in that, The battery device further includes a third connector and a fourth connector, the third connector being used to connect the isolation seat and the first limiting member, and the fourth connector being used to connect the isolation seat and the second limiting member.

19. The battery device according to claim 18, characterized in that, The third connecting component is one of bolts, screws, rivets, and locking pins; and / or, The fourth connector is one of bolts, screws, rivets, and pins.

20. The battery device according to any one of claims 1-19, characterized in that, The isolation seat is snapped together with the first limiting member; and / or The isolation seat is snapped together with the second limiting member.

21. The battery device according to any one of claims 1-20, characterized in that, The isolation seat includes an insulator and a metal body, the insulator covering the outer surface of the metal body, and the metal body connecting the first limiting member and the second limiting member.

22. The battery device according to any one of claims 1-21, characterized in that, The first limiting member and / or the second limiting member are non-metallic parts.

23. An energy storage device, characterized in that, The energy storage device includes a battery device as described in any one of claims 1-22, the battery device being used to store or provide electrical energy.

24. An energy storage system, characterized in that, The energy storage system includes a power conversion device and the energy storage device as described in claim 23, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

25. An electrical appliance, characterized in that, The electrical equipment includes a battery device as described in any one of claims 1-22, an energy storage device as described in claim 23, or an energy storage system as described in claim 24, wherein the battery device is used to store or provide electrical energy.

26. A charging network, characterized in that, The charging network includes charging piles and an energy storage device as described in claim 23 or an energy storage system as described in claim 24, wherein the energy storage device is used to provide electrical energy to the charging piles.

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