Battery cell, battery device, and electric device

Abstract

The application discloses a battery monomer, a battery device and a power utilization device. The battery monomer comprises a shell, a pole is arranged in a first wall of the shell in a vertical direction and faces a lower side of the shell, an electrode assembly is arranged in the shell and comprises an electrode body and a conductive part connected with the electrode body, the conductive part is connected with the pole, a first insulating part is arranged in the shell and between the electrode body and the first wall, a side surface of the first insulating part facing the electrode body is provided with a busbar groove recessed towards the first wall, and the pole and / or the conductive part is arranged in the busbar groove. In the technical scheme, the busbar groove recessed towards the first wall is arranged on the side surface of the first insulating part facing the electrode body, so that the electrolyte can be collected in the busbar groove when the battery monomer is inverted, the efficiency of electrolyte infiltration and back absorption is effectively improved, the circulation of the electrolyte is accelerated, the heat dissipation performance is effectively improved, and the reliability of the battery monomer is improved.

Description

Technical Field

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

[0002] 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 part of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development. To achieve long driving ranges, inverting the battery allows for full utilization of its vertical space, and combined with a safe venting gap design, this results in higher volumetric energy density.

[0003] When the battery cell is used upside down, the original free electrolyte inside the cell will concentrate at the top cover, which will prevent the free electrolyte from being absorbed by the core or result in low absorption efficiency. In addition, the temperature rise near the tabs is high during charging and discharging, which will affect the performance of the battery cell and reduce its reliability. Utility Model Content

[0004] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes a battery cell, and a battery device and an electrical device including the battery cell. When the battery cell is inverted, it can collect the electrolyte in a manifold, thereby effectively improving the efficiency of electrolyte wetting and reabsorption, thereby accelerating the circulation of the electrolyte, and thus effectively improving heat dissipation performance and enhancing the reliability of the battery cell.

[0005] In a first aspect, embodiments of this application provide a battery cell, the battery cell comprising: a housing, the lower wall of the housing in the vertical direction being a first wall; an electrode post, passing through the first wall and disposed towards the lower side of the housing; an electrode assembly, disposed within the housing and including an electrode body and a conductive part connected to the electrode body, the conductive part being connected to the electrode post; and a first insulating member, disposed within the housing and located between the electrode body and the first wall, the surface of the first insulating member facing the electrode body having a current-collecting groove recessed towards the first wall, the electrode post and / or the conductive part being disposed within the current-collecting groove.

[0006] In the above technical solution, by providing a concave channel facing the first wall on the surface of the first insulating member facing the electrode body, and the electrode post and / or conductive part being disposed in the concave channel, when the battery cell is inverted, the electrolyte can be collected in the concave channel, thereby effectively improving the efficiency of electrolyte wetting and reabsorption, thereby accelerating the circulation of electrolyte, and thus effectively improving heat dissipation performance and improving the reliability of the battery cell.

[0007] In some embodiments of this application, the first insulating member includes: an insulating body supported between the electrode body and the first wall, a through hole formed on the insulating body in the vertical direction, and an electrode post arranged radially inside the through hole; and a filler, disposed on the side of the insulating body facing the electrode body, arranged around the through hole and extending in a ring shape along the circumference of the through hole, the filler and the insulating body cooperating to form a manifold.

[0008] In the above technical solution, by forming a through hole in the insulating body in the vertical direction, and arranging the electrode post in the radial inner side of the through hole, the installation space required for the electrode post can be effectively saved, thereby effectively improving the compactness of the battery cell; by setting the filler on the side of the insulating body facing the electrode body, arranging the filler around the through hole and extending into a ring along the circumference of the through hole, and the filler and the insulating body cooperate to form a busbar, the busbar can be integrated on the first insulating member, thereby effectively improving the space utilization rate inside the battery cell.

[0009] In some embodiments of this application, the insulating body and the filler are integrally formed, or the insulating body and the filler are separate parts.

[0010] In the above technical solution, setting the insulating body and the filler as an integral molding can effectively improve the assembly efficiency and structural strength of the first insulating component; setting the insulating body and the filler as separate parts can effectively improve the flexibility and maintenance convenience of the first insulating component.

[0011] In some embodiments of this application, an injection hole is formed on the first wall, and a clearance hole is formed on the insulating body in the vertical direction. The injection hole and the clearance hole are directly opposite to and connected. In the horizontal projection plane, the filler and the clearance hole are arranged at intervals.

[0012] In the above technical solution, by aligning and connecting the injection hole on the first wall and the clearance hole on the insulating body, the filler and the clearance hole are arranged separately in the horizontal projection plane, which can reasonably arrange the positions of the filler and the clearance hole, thereby effectively improving the injection efficiency and convenience of the battery cell.

[0013] In some embodiments of this application, a pressure relief area is provided on the first wall, and an exhaust hole is formed on the insulating body that runs through the insulating body in the vertical direction. The exhaust hole is directly opposite to and connected to the pressure relief area. In the horizontal projection plane, the filler and the exhaust hole are arranged at intervals.

[0014] In the above technical solution, by aligning and connecting the vent hole on the insulating body and the pressure relief area on the first wall, and by arranging the filler and vent hole separately in the horizontal projection plane, the rationality of the positional relationship between the filler and the vent hole can be improved, so that when the gas pressure inside the battery cell is too high, the gas can be smoothly discharged from the vent hole, thereby effectively improving the reliability of the battery cell.

[0015] In some embodiments of this application, the insulating body is formed with a boss located on the side of the insulating body facing the electrode body and extending in a ring shape along the circumference of the vent hole.

[0016] In the above technical solution, by forming a boss on the insulating body, the boss is located on the side of the insulating body facing the electrode body and extends in a ring along the circumference of the vent hole, which can effectively guide the flow direction of gas inside the battery cell and effectively reduce the possibility of electrolyte flowing into the vent hole, thereby effectively improving the reliability of the battery cell.

[0017] In some embodiments of this application, the thickness of the filler is less than or equal to the protrusion height of the boss in the vertical direction.

[0018] In the above technical solution, the thickness of the filler is set to be less than or equal to the protrusion height of the boss in the vertical direction. This not only further guides the flow and venting of gas inside the battery cell, thus facilitating the depressurization of gas inside the battery cell in the depressurization zone, but also further reduces the possibility of electrolyte flowing into the venting hole, thereby effectively improving the reliability of the battery cell.

[0019] In some embodiments of this application, in the vertical direction, the ratio of the maximum thickness of the first insulating member to the thickness of the first wall is greater than or equal to 1 and less than or equal to 80.

[0020] In the above technical solution, in the vertical direction, the ratio of the maximum thickness of the first insulating component to the thickness of the first wall is set to be greater than or equal to 1 and less than or equal to 80. This not only ensures that the first insulating component and the first wall have reasonable structural strength, but also effectively takes into account the energy density of the battery cell, thereby effectively improving the reliability of the battery cell.

[0021] In some embodiments of this application, in the vertical direction, the ratio of the maximum thickness of the first insulating member to the thickness of the first wall is greater than or equal to 3 and less than or equal to 12.

[0022] In the above technical solution, by setting the ratio of the maximum thickness of the first insulating component to the thickness of the first wall to be greater than or equal to 3 and less than or equal to 12 in the vertical direction, the ratio range of the maximum thickness of the first insulating component to the thickness of the first wall can be further optimized, thereby further improving the reliability of the battery cell.

[0023] In some embodiments of this application, the top wall of the housing is a second wall, and the battery cell further includes a support plate, which is disposed between the electrode assembly and the second wall, and an exhaust space is formed between the support plate and the second wall.

[0024] In the above technical solution, by placing the support plate between the electrode assembly and the second wall, an exhaust space is formed between the support plate and the second wall. This not only helps to exhaust the battery cell, thereby effectively improving the exhaust performance of the battery cell, but also effectively supports and fixes the electrode body, thereby effectively improving the reliability of the electrode body.

[0025] In some embodiments of this application, the tray includes: a tray body and a plurality of support members. The tray body is a horizontally arranged tray shape, and the plurality of support members are connected to the tray body and are all arranged on the side of the tray body facing the second wall.

[0026] In the above technical solution, by setting a plate body and multiple support members in the tray, the plate body is a horizontally arranged plate shape, and the multiple support members are connected to the plate body and are all arranged on the side of the plate body facing the second wall, which can not only effectively protect the electrode body, but also effectively simplify the structural construction of the plate body, thereby facilitating the manufacturing and assembly of the plate body, and thus effectively improving work efficiency.

[0027] In some embodiments of this application, multiple support members are arranged around the periphery of the plate body and spaced apart along the circumference of the plate body.

[0028] In the above technical solution, multiple support members are arranged around the periphery of the plate body and spaced apart along the circumference of the plate body, so that the multiple support members can provide reliable support for the pallet, reduce the deformation or displacement of the pallet during use, and thus further improve the stability and reliability of the electrode body.

[0029] In some embodiments of this application, the plurality of support members include a first support member and a second support member. The first support member is arranged at both ends of the plate body in the length direction to support the two ends of the electrode assembly in the length direction, and the second support member is arranged in the middle region of the plate body in the length direction.

[0030] In the above technical solution, by arranging the first support member at both ends of the plate body in the length direction to support the two ends of the electrode assembly in the length direction, and arranging the second support member in the middle area of ​​the plate body in the length direction, multiple support members can be evenly distributed on the pallet, thereby effectively reducing the risk of excessive local deformation or displacement of the pallet, and thus effectively improving the durability of the pallet.

[0031] In some embodiments of this application, a thinning groove is formed on the inner surface of the shell wall at the end of the shell away from the first wall.

[0032] In the above technical solution, by forming a thinning groove on the inner surface of the shell wall at the end away from the first wall, the space inside the battery cell used to store the gas generated by the electrode body can be effectively increased, thereby effectively improving the reliability of the battery cell.

[0033] In some embodiments of this application, the horizontal cross-section of the housing is rectangular, and the thinning groove is formed at the corner of the top of the housing.

[0034] In the above technical solution, the horizontal cross-section of the shell is set to a rectangle, and the thinning groove is formed at the corner of the top of the shell. This can increase the gas generation space inside the battery cell without significantly affecting the overall structural strength, thereby effectively improving the rationality of the position of the thinning groove and thus effectively improving the reliability of the battery cell.

[0035] In some embodiments of this application, a portion of the shell wall at the end of the housing opposite to the first wall protrudes from the inside out to form a protrusion, which defines a compensation space inside the housing.

[0036] In the above technical solution, by protruding a portion of the shell wall at the end of the shell away from the first wall from the inside to the outside to form a protrusion, the protrusion defines a compensation space inside the shell, which can effectively increase the space inside the battery cell for storing gas generated by the electrode body, thereby effectively improving the reliability of the battery cell.

[0037] In some embodiments of this application, the horizontal cross-section of the housing is rectangular, and the protrusion is formed at the corner of the top of the housing.

[0038] In the above technical solution, by setting the horizontal cross-section of the shell to a rectangle and forming the protrusion at the corner of the top of the shell, it is possible not only to effectively improve the rigidity and structural strength of the corner of the top of the shell, thereby effectively improving the structural stability of the battery cell, but also to effectively reduce the processing difficulty, thereby effectively improving the processing efficiency.

[0039] In some embodiments of this application, the housing includes a main shell and a cover plate, the bottom of the main shell is open, the cover plate covers the open side of the main shell, and the cover plate is a first wall.

[0040] In the above technical solution, by setting a main shell and a cover plate in the housing, with the bottom of the main shell open and the cover plate sealing the open side of the main shell, the cover plate serves as the first wall, which can effectively improve the convenience of disassembly and maintenance of battery cells, thereby effectively improving the work efficiency of disassembly and maintenance of battery cells.

[0041] In some embodiments of this application, the conductive part includes a tab connected between the electrode body and the electrode post, and a portion of the electrode post and the tab is disposed in the manifold; or, the conductive part includes a tab and an adapter plate connected to the electrode post, the tab connected between the adapter plate and the electrode body, and a portion of the tab, the electrode post and the adapter plate are disposed in the manifold.

[0042] In the above technical solution, by setting tabs in the conductive part, with the tabs connected between the electrode body and the terminal post, and a portion of the terminal post and the tabs located in the busbar, the structure of the conductive part can be effectively simplified, thereby effectively saving costs. By setting tabs and adapter plates in the conductive part, with the adapter plates connected to the terminal post, and the tabs connected between the adapter plates and the electrode body, and a portion of the tabs, the terminal post, and the adapter plates located in the busbar, the stability of the connection between the electrode body and the terminal post can be improved, the contact resistance can be reduced, and modular integration can be facilitated, thereby effectively improving the reliability of the battery cell.

[0043] Secondly, embodiments of this application provide a battery device, which includes a housing and a battery cell according to the first aspect of this application. The battery cell is disposed in the housing, and the housing includes a bottom plate located at the bottom of the housing, with the terminal post disposed on the side of the housing facing the bottom plate.

[0044] In the above technical solution, by setting the battery cell of the first aspect in the battery device, when the battery cell is inverted, the electrolyte can be collected in the manifold, thereby effectively improving the efficiency of electrolyte wetting and reabsorption, thereby accelerating the circulation of electrolyte, and thus effectively improving heat dissipation performance and improving the reliability of the battery device.

[0045] Thirdly, embodiments of this application provide an electrical device that includes a battery device according to the second aspect of this application.

[0046] In the above technical solution, by setting the battery device of the second aspect in the electrical device, when the battery cell is inverted, the electrolyte can be collected in the manifold, thereby effectively improving the efficiency of electrolyte wetting and reabsorption, thereby accelerating the circulation of electrolyte, and thus effectively improving heat dissipation performance and improving the reliability of the electrical device.

[0047] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the vehicle structure according to an embodiment of this application;

[0049] Figure 2 This is an exploded view of a battery device according to an embodiment of this application;

[0050] Figure 3 This is an exploded view of a battery cell according to an embodiment of this application;

[0051] Figure 4 This is a structural schematic diagram of the first insulating member at one angle according to an embodiment of this application;

[0052] Figure 5 yes Figure 4 A magnified view of point A, indicated by the center circle;

[0053] Figure 6 This is a structural schematic diagram of the first insulating member according to an embodiment of this application from another angle;

[0054] Figure 7 yes Figure 6 A magnified view of point B, indicated by the center circle;

[0055] Figure 8 This is a schematic diagram of the structure of the tray according to an embodiment of this application.

[0056] Figure label:

[0057] 1. Electrical appliances;

[0058] 100. Battery device;

[0059] 10. Battery cells;

[0060] 11. Shell; 111. First wall; 1111. Injection hole; 112. Second wall; 113. Main shell; 114. Cover plate;

[0061] 12. Pole post;

[0062] 131. Electrode body; 132. Conductive part; 1321. Electrode tab; 1322. Adapter piece;

[0063] 14. First insulating component; 141. Combustion groove; 142. Insulating body; 1421. Clearance hole; 1422. Vent hole; 1423. Boss; 143. Filler;

[0064] 15. Pallet; 151. Pallet body; 1521. First support component; 1522. Second support component;

[0065] 20. Box body;

[0066] 21. Box main body; 211. Bottom plate;

[0067] 22. Cover;

[0068] 200. Controller;

[0069] 300. Motor. Detailed Implementation

[0070] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0071] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein 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 description of the drawings are intended to cover non-exclusive inclusion.

[0072] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0073] In this document, the term "embodiment" means that a particular 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 separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0074] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0075] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two).

[0076] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended 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 the embodiments of this application.

[0077] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0078] 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 one or more battery cells, and when there are multiple battery cells, they are connected in series, parallel, or mixed connections via a busbar.

[0079] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; 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 a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0080] 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.

[0081] 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.

[0082] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0083] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0084] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0085] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0086] In some embodiments, the battery device refers to an energy storage device, which includes a housing with a door on at least one side. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0087] The battery cells mentioned in the embodiments of this application may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application are not limited to these. Battery cells may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited to these shapes either. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and the embodiments of this application are not limited to these types either.

[0088] For example, a single battery cell typically includes a housing, a cell assembly, and an electrolyte. The housing is used to house the cell assembly and the electrolyte, and the housing has at least one positive electrode post and at least one negative electrode post. The cell assembly includes one or more electrode assemblies, which are formed by stacking or winding positive electrode sheets, negative electrode sheets, and separators.

[0089] The positive electrode generally includes a positive current collector and a positive active material layer. The positive active material layer is directly or indirectly coated on the positive current collector. The positive current collector without the positive active material layer protrudes from the positive current collector with the positive active material layer. The positive current collector without the positive active material layer serves as a positive electrode tab. Multiple positive electrode tabs are stacked together and form an electrical connection with the positive electrode post. For example, the multiple stacked positive electrode tabs can be directly soldered to the positive electrode post to form an electrical connection; or, the battery cell assembly can also include a positive electrode adapter piece. The multiple stacked positive electrode tabs are soldered to one end of the positive electrode adapter piece, and the other end of the positive electrode adapter piece is soldered to the positive electrode post, so that the positive electrode tabs and the positive electrode post form an electrical connection.

[0090] The negative electrode generally includes a negative current collector and a negative active material layer. The negative active material layer is directly or indirectly coated on the negative current collector. The negative current collector without the negative active material layer protrudes from the negative current collector with the negative active material layer. The negative current collector without the negative active material layer serves as a negative electrode tab. Multiple negative electrode tabs are stacked together and form an electrical connection with the negative electrode post. For example, the stacked negative electrode tabs can be directly welded to the negative electrode post to form an electrical connection; alternatively, the battery cell assembly may also include a negative electrode adapter piece. The stacked negative electrode tabs are welded to one end of the negative electrode adapter piece, and the other end of the negative electrode adapter piece is welded to the negative electrode post, so that the negative electrode tabs and the negative electrode post form an electrical connection. The material of the separator is not limited; for example, it can be polypropylene or polyethylene.

[0091] Meanwhile, individual battery cells primarily function by the movement of metal ions between the positive and negative electrode plates. Taking lithium-ion batteries as an example, the positive electrode current collector can be made of aluminum, and the positive electrode active material layer can be made of lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode current collector can be made of copper, and the negative electrode active material layer can be made of carbon or silicon, etc. During charging and discharging, Li+ ions repeatedly insert and extract between the two electrodes: during charging, Li+ ions extract from the positive electrode, pass through the electrolyte, and insert into the negative electrode, leaving the negative electrode in a lithium-rich state; the reverse occurs during discharging.

[0092] The technical solutions described in the embodiments of this application are applicable to various power devices that use battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, and vehicles.

[0093] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, battery devices, as the power source, play an irreplaceable and crucial role. With the continuous increase in the required driving range of new energy vehicles, the demand for battery pack energy density is also constantly rising. To improve the energy density of battery packs, the need for inverted battery installation has been proposed when optimizing battery layout.

[0094] When a battery is inverted, the electrolyte inside will distribute near the top cover due to gravity, preventing it from pooling. This results in the free electrolyte not being absorbed by the core or having low absorption efficiency, hindering the effective transport of lithium ions and affecting battery efficiency and capacity. Furthermore, the area near the tabs experiences high temperature rise during charging and discharging. If the electrolyte cycle efficiency is low, it will affect the battery's heat dissipation performance, thus impacting battery lifespan and reducing reliability.

[0095] Based on the above considerations, in order to improve the reliability of the battery cell, this application designs a battery cell including a housing, terminals, an electrode assembly, and a first insulating member. The bottom wall of the housing in the vertical direction is the first wall. The terminals pass through the first wall and are arranged facing the lower side of the housing. The electrode assembly is disposed in the housing and includes an electrode body and a conductive part connected to the electrode body. The conductive part is connected to the terminals. The first insulating member is disposed in the housing and is located between the electrode body and the first wall. The surface of the first insulating member facing the electrode body has a concave channel facing the first wall. The terminals and / or the conductive part are disposed in the concave channel. When the battery cell is inverted, the electrolyte inside the battery cell can flow into the concave channel under the action of gravity, thereby collecting the electrolyte in the concave channel. Furthermore, since the terminals and / or conductive parts are located in the manifold, the electrolyte in the manifold can fully wet the terminals and / or conductive parts, thereby effectively improving the efficiency of electrolyte wetting and reabsorption, thus accelerating the circulation of electrolyte, and further improving heat dissipation performance and enhancing the reliability of the battery cell.

[0096] This application provides an electrical device that uses the battery cell disclosed herein as a power source. The electrical device can be, but is not limited to, a mobile phone, tablet, laptop, electric toy, power tool, electric vehicle, and electric car, etc. The electric toy can include stationary or mobile electric toys, such as game consoles and toy electric cars, etc.

[0097] For ease of explanation, the following embodiments use a vehicle as an example to describe the structure of the battery cell 10, battery device 100, and electrical device 1 of this application in detail.

[0098] Please refer to Figure 1 , Figure 1 A schematic diagram of the vehicle structure according to an embodiment of this application. The vehicle 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. The vehicle is equipped with a battery device 100, which can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to supply power to the vehicle; for example, the battery device 100 can serve as the vehicle's operating power source. The vehicle may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of starting, navigation, and driving the vehicle. In some embodiments of this application, the battery device 100 can not only serve as the vehicle's operating power source but also as the vehicle's driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to the vehicle.

[0099] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery device according to an embodiment of this application; Figure 3This is an exploded view of a battery cell according to an embodiment of this application; Figure 4 This is a structural schematic diagram of the first insulating member at one angle according to an embodiment of this application;

[0100] Figure 5 yes Figure 4 A magnified view of point A, indicated by the center circle; Figure 6 This is a structural schematic diagram of the first insulating member according to an embodiment of this application from another angle; Figure 7 yes Figure 6 A magnified view of point B, indicated by the center circle; Figure 8 This is a schematic diagram of the structure of the tray according to an embodiment of this application.

[0101] The following is for reference. Figures 3-8 A battery cell 10 according to an embodiment of the first aspect of this application is described.

[0102] This application provides an embodiment of a battery cell 10, such as Figures 3-8 As shown, the battery cell 10 includes: a housing 11, a terminal post 12, an electrode assembly, and a first insulating member 14.

[0103] The housing 11 is in the vertical direction (e.g.) Figure 3 The lower shell wall (in the Z direction shown) is the first wall 111; the electrode post 12 passes through the first wall 111 and is disposed towards the lower side of the shell 11; the electrode assembly is disposed inside the shell 11 and includes an electrode body 131 and a conductive part 132 connected to the electrode body 131, the conductive part 132 being connected to the electrode post 12; the first insulating member 14 is disposed inside the shell 11 and located between the electrode body 131 and the first wall 111, the surface of the first insulating member 14 facing the electrode body 131 is provided with a concave channel 141 facing the first wall 111, and the electrode post 12 and / or the conductive part 132 are disposed in the concave channel 141.

[0104] It should be noted that in some specific examples, such as Figure 3 As shown, the length direction of the battery cell 10 is the X direction, the width direction of the battery cell 10 is the Y direction, and the height direction of the battery cell 10 is the Z direction.

[0105] In some specific examples, such as Figure 3 As shown, the battery cell 10 is in an inverted state. The side wall of the housing 11 on the Z-direction is the lower housing wall, which is the first wall 111. Furthermore, the terminal post 12 extends along the Z-direction, and there are two terminal posts 12. One terminal post 12 is the positive terminal post 12, and the other terminal post 12 is the negative terminal post 12. Both the positive terminal post 12 and the negative terminal post 12 pass through the first wall 111 and are positioned towards the lower side of the housing 11. In other words, with the battery cell 10 inverted and the terminal post 12 passing through the first wall 111 and positioned towards the lower side of the housing 11, current can enter and exit the battery cell 10 through the terminal post 12.

[0106] In some specific examples, such as Figure 3 As shown, an electrode assembly is disposed within the housing 11. The electrode assembly includes an electrode body 131 and a conductive portion 132. The conductive portion 132 is connected to the electrode body 131, and current can flow through the conductive portion 132 through the electrode body 131. Further, there are two conductive portions 132, arranged at a distance in the X-direction. Each conductive portion 132 corresponds to one of the two electrode posts 12 and is located between the electrode body 131 and the electrode posts 12. In some specific examples, the electrode body 131 is an electrode winding core, which is formed by winding or stacking a combination of anode / diaphragm / cathode.

[0107] In some specific examples, such as Figure 3 As shown, the periphery of the first wall 111 is welded to one end of the housing 11 in the Z-direction, thereby forming a closed cavity inside the housing 11 to accommodate the electrode assembly and the first insulating member 14. Further, the first insulating member 14 is located between the electrode body 131 and the first wall 111. A current-collecting groove 141 is provided on the surface of the first insulating member 14 facing the electrode body 131, and the current-collecting groove 141 is recessed towards the first wall 111. For example, the electrode post 12 is disposed within the current-collecting groove 141; or, the conductive part 132 is disposed within the current-collecting groove 141; or, both the electrode post 12 and the conductive part 132 are disposed within the current-collecting groove 141.

[0108] It should be noted that in the prior art, when the battery cell 10 is inverted, the electrolyte inside the battery cell 10 will be distributed near the top cover of the battery under the influence of gravity. The electrolyte cannot gather together, resulting in the free electrolyte not being absorbed by the terminal post 12 or the electrode assembly, or the absorption efficiency being low. This hinders the effective transport of lithium ions, affecting the battery efficiency and capacity. In addition, the temperature rise near the conductive part 132 is high during charging and discharging. If the electrolyte cycle efficiency is low, it will affect the heat dissipation performance of the battery cell 10, thereby affecting the service life of the battery cell 10 and reducing the reliability of the battery cell 10.

[0109] In this application, a confluence channel 141 recessed towards the first wall 111 is provided on the surface of the first insulating member 14 facing the electrode body 131. The electrode post 12 and / or conductive part 132 are disposed within the confluence channel 141. When the battery cell 10 is inverted, the electrolyte inside the battery cell 10 can flow to the surface of the first insulating member 14 facing the electrode assembly under the action of gravity. Then, the electrolyte flows into the confluence channel 141 under the action of gravity, thereby collecting the electrolyte in the confluence channel 141. Since the electrode post 12 and / or conductive part 132 are disposed within the confluence channel 141, the electrolyte in the confluence channel 141 can fully wet the electrode post 12 and / or conductive part 132, thereby effectively improving the efficiency of electrolyte wetting and reabsorption, thereby accelerating the circulation of electrolyte, and thus effectively improving heat dissipation performance and enhancing the reliability of the battery cell 10.

[0110] In the above technical solution, by providing a converging groove 141 recessed towards the first wall 111 on the side surface of the first insulating member 14 facing the electrode body 131, and the electrode post 12 and / or conductive part 132 disposed in the converging groove 141, when the battery cell 10 is inverted, the electrolyte can be collected in the converging groove 141, thereby effectively improving the efficiency of electrolyte wetting and reabsorption, thereby accelerating the circulation of electrolyte, and thus effectively improving heat dissipation performance and improving the reliability of the battery cell 10.

[0111] In some embodiments of this application, the first wall 111 is made of aluminum, steel or titanium.

[0112] It should be noted that aluminum components have a low density, thus enabling the lightweighting of the battery cell 10. Furthermore, aluminum components have good thermal conductivity, which helps the battery cell 10 dissipate heat quickly. Steel components have excellent mechanical strength, providing stronger mechanical protection, and are less expensive, thus effectively reducing the cost of the battery cell 10. Titanium components have an excellent strength-to-weight ratio and excellent corrosion resistance, thus effectively improving the structural strength and durability of the battery cell 10.

[0113] In the above technical solution, setting the first wall 111 to an aluminum material can effectively reduce the weight of the battery cell 10 and effectively improve the heat dissipation efficiency of the battery cell 10; setting the first wall 111 to a steel material can effectively improve the structural strength of the battery cell 10 and effectively reduce the cost; setting the first wall 111 to a titanium material can effectively improve the structural strength and durability of the battery cell 10.

[0114] In some embodiments of this application, such as Figure 3 and Figure 4 As shown, the first insulating member 14 includes an insulating body 142 and a filler 143.

[0115] The insulating body 142 is supported between the electrode body 131 and the first wall 111, and the insulating body 142 has a vertically oriented (e.g., vertically oriented) surface. Figure 3 and Figure 4 The through hole (Z-direction) of the insulating body 142 shown in the figure is arranged in the radial inner side of the through hole; the filler 143 is provided on the side of the insulating body 142 facing the electrode body 131, the filler 143 is arranged around the through hole and extends in a ring along the circumference of the through hole, and the filler 143 and the insulating body 142 cooperate to form a manifold 141.

[0116] It should be noted that in some specific examples, such as Figure 3 and Figure 4 As shown, the height direction of the battery cell 10 is the Z-axis, which is the vertical direction. In some specific examples, such as... Figure 3 and Figure 4 As shown, the insulating body 142 is disposed between the electrode body 131 and the first wall 111, serving as support and insulation. The insulating body 142 is provided with a through hole extending through the insulating body 142 along the Z direction. Furthermore, there are two through holes, which are arranged at intervals along the X direction, and the pole posts 12 are correspondingly inserted into the through holes.

[0117] In some specific examples, such as Figure 3 and Figure 4 As shown, the filler 143 is disposed on the insulating body 142 and located between the insulating body 142 and the electrode body 131. The filler 143 extends circumferentially along the through hole in an annular structure, thereby enabling the filler 143 and the side surface of the insulating body 142 facing the electrode assembly to jointly enclose the manifold 141. When the battery cell 10 is inverted, the electrolyte first flows to the side surface of the filler 143 facing the electrode assembly under the action of gravity, and then continues to flow into the manifold 141, where it collects.

[0118] In the above technical solution, by forming a through hole in the insulating body 142 in the vertical direction, and arranging the electrode post 12 on the radial inner side of the through hole, the installation space required for the electrode post 12 can be effectively saved, thereby effectively improving the compactness of the battery cell 10; by setting the filler 143 on the side of the insulating body 142 facing the electrode body 131, the filler 143 is arranged around the through hole and extends in a ring shape along the circumference of the through hole, and the filler 143 and the insulating body 142 cooperate to form a current-collecting groove 141, the current-collecting groove 141 can be integrated on the first insulating member 14, thereby effectively improving the space utilization rate inside the battery cell 10.

[0119] In some embodiments of this application, such as Figure 3As shown, the insulating body 142 and the filler 143 are integrally formed, or the insulating body 142 and the filler 143 are separate parts.

[0120] For example, the insulating body 142 and the filler 143 may be integrally formed; alternatively, the insulating body 142 and the filler 143 may be separate parts. It should be noted that when the insulating body 142 and the filler 143 are integrally formed, no additional assembly steps are required to combine them, thereby effectively improving the assembly efficiency of the first insulating element 14. Furthermore, integral forming typically provides higher structural strength, thus effectively reducing the risk of separation between the insulating body 142 and the filler 143.

[0121] When the insulating body 142 and the filler 143 are separate components, different materials or processing techniques can be selected according to the functional requirements of different components, thereby effectively improving flexibility. In addition, since the insulating body 142 and the filler 143 are separate components, they are easy to repair and replace, thereby effectively improving the convenience of maintenance of the first insulating component 14.

[0122] In the above technical solution, the insulating body 142 and the filler 143 are integrally formed, which can effectively improve the assembly efficiency and structural strength of the first insulating component 14; the insulating body 142 and the filler 143 are separate parts, which can effectively improve the flexibility and maintenance convenience of the first insulating component 14.

[0123] In some embodiments of this application, such as Figure 4 As shown, a liquid injection hole 1111 is formed on the first wall 111, and a vertically oriented (e.g., vertically oriented) hole is formed on the insulating body 142. Figure 4 The Z-direction through clearance hole 1421 shown in the figure has an injection hole 1111 that is directly opposite to and connected to the clearance hole 1421. In the horizontal projection plane, the filler 143 is arranged at a distance from the clearance hole 1421.

[0124] It should be noted that the injection hole 1111 on the first wall 111 can be used to inject electrolyte into the interior of the battery cell 10. In some specific examples, the injection hole 1111 extends through the first wall 111 in the Z direction, and the clearance hole 1421 extends through the insulating body 142 in the Z direction. The injection hole 1111 and the clearance hole 1421 are directly opposite and connected in the Z direction. That is to say, electrolyte can be injected into the interior of the battery cell 10 through the injection hole 1111 and the clearance hole 1421.

[0125] In the horizontal projection plane, the filler 143 and the clearance hole 1421 are arranged separately. That is to say, the filler 143 will not obstruct the flow of electrolyte added through the injection hole 1111. The electrolyte can flow directly from the injection hole 1111 into the interior of the battery cell 10, thereby effectively improving the electrolyte injection efficiency.

[0126] In the above technical solution, by having the injection hole 1111 on the first wall 111 and the clearance hole 1421 on the insulating body 142 face each other and connect, the filler 143 and the clearance hole 1421 are arranged separately in the horizontal projection plane, so that the positions of the filler 143 and the clearance hole 1421 can be reasonably arranged, thereby effectively improving the injection efficiency and convenience of the battery cell 10.

[0127] In some embodiments of this application, such as Figure 4 As shown, a pressure relief area is provided on the first wall 111, and a pressure relief area is formed on the insulating body 142 along the vertical direction (e.g., Figure 4 The vent 1422 (shown in the Z direction) penetrates the insulating body 142. The vent 1422 is directly opposite to and connected to the pressure relief area. In the horizontal projection plane, the filler 143 is arranged at a distance from the vent 1422.

[0128] It should be noted that the pressure relief zone on the first wall 111 can release pressure when the pressure inside the battery cell 10 is too high, thereby effectively reducing the possibility of the battery cell 10 exploding or other dangerous situations. In some specific examples, such as Figure 4 As shown, the pressure relief zone is located on the first wall 111, and the vent 1422 penetrates the insulating body 142 along the Z direction. The vent 1422 is directly opposite to and connected to the pressure relief zone in the Z direction. In other words, the vent 1422 provides a direct channel for the gas generated inside the battery cell 10 to the external environment, so that the battery cell 10 can be quickly depressurized in an emergency.

[0129] In the horizontal projection plane, the filler 143 and the vent 1422 are arranged separately. That is to say, the filler 143 will not obstruct the gas inside the battery cell 10 from being discharged through the vent 1422, so that the pressure inside the battery cell 10 can be released in a timely and effective manner, thereby reducing the risk caused by the blockage of the vent 1422 or poor venting.

[0130] In the above technical solution, by aligning and connecting the vent hole 1422 on the insulating body 142 and the pressure relief area on the first wall 111, and by arranging the filler 143 and the vent hole 1422 separately in the horizontal projection plane, the rationality of the positional relationship between the filler 143 and the vent hole 1422 can be improved, so that when the gas pressure inside the battery cell 10 is too high, the gas can be smoothly discharged from the vent hole 1422, thereby effectively improving the reliability of the battery cell 10.

[0131] In some embodiments of this application, such as Figure 3 and Figure 4As shown, the insulating body 142 has a boss 1423, which is located on the side of the insulating body 142 facing the electrode body 131 and extends in a ring shape along the circumference of the vent hole 1422.

[0132] In some specific examples, such as Figure 3 and Figure 4 As shown, the boss 1423 is located between the electrode body 131 and the insulating body 142, and the boss 1423 extends circumferentially along the vent hole 1422 in a ring structure. That is, the boss 1423 forms a raised ring around the vent hole 1422. The boss 1423 can guide the flow direction of gas inside the battery cell 10 and reduce the possibility of electrolyte flowing into the vent hole 1422.

[0133] In the above technical solution, by forming a boss 1423 on the insulating body 142, the boss 1423 is located on the side of the insulating body 142 facing the electrode body 131 and extends in a ring along the circumference of the vent hole 1422, which can effectively guide the flow direction of the gas inside the battery cell 10 and effectively reduce the possibility of electrolyte flowing into the vent hole 1422, thereby effectively improving the reliability of the battery cell 10.

[0134] In some embodiments of this application, such as Figure 5 As shown, in the vertical direction, the thickness of the filler 143 is less than or equal to the protrusion height of the boss 1423.

[0135] In some specific examples, such as Figure 5 As shown, in the Z direction, the thickness H1 of the filler 143 is less than or equal to the protrusion height H2 of the boss 1423. This not only further guides the flow and exhaust of gas inside the battery cell 10, thus facilitating the depressurization of gas inside the battery cell 10 in the depressurization area, but also further reduces the possibility of electrolyte flowing into the exhaust port 1422.

[0136] In some specific examples, the thickness of the filler 143 at both ends in the Y direction is greater than the thickness of the filler 143 in the middle part in the Y direction. This can effectively reduce the possibility of electrolyte accumulating at the periphery of the first wall 111, and thus effectively reduce the risk of electrolyte corrosion of the weld seam at the periphery of the first wall 111.

[0137] In the above technical solution, the thickness of the filler 143 is set to be less than or equal to the protrusion height of the boss 1423 in the vertical direction. This not only further guides the flow and exhaust of gas inside the battery cell 10, thus facilitating the depressurization of gas inside the battery cell 10 in the depressurization area, but also further reduces the possibility of electrolyte flowing into the exhaust hole 1422, thereby effectively improving the reliability of the battery cell 10.

[0138] It should be noted that the thickness H1 of the filler 143 and the protrusion height H2 of the boss 1423 can be measured using measuring tools such as a coordinate measuring machine, vernier calipers, and micrometers. The following description uses a coordinate measuring machine as an example to illustrate the measurement method for the thickness H1 of the filler 143 and the protrusion height H2 of the boss 1423. First, data points on the workpiece surface are acquired by contacting the probe of the coordinate measuring machine or by laser scanning. Then, geometric parameters such as height are calculated based on these data points.

[0139] In some embodiments of this application, such as Figure 7 As shown, in the vertical direction, the ratio of the maximum thickness of the first insulating member 14 to the thickness of the first wall 111 is greater than or equal to 1 and less than or equal to 80.

[0140] In some specific examples, such as Figure 7 As shown, the thickness of the first insulating member 14 is the largest at both ends in the X direction. The maximum thickness of the first insulating member 14 is H3, and the thickness of the first wall 111 is H4. For example, the ratio of the maximum thickness of the first insulating member 14 H3 to the thickness of the first wall 111 H4 can be 1, 10, 20, 30, 40, 50, 60, 70 and 80.

[0141] It should be noted that the first insulating member 14 not only needs to provide electrical insulation, but also needs to have sufficient mechanical strength to support the electrode assembly and withstand certain external pressure and internal stress. If the ratio of the maximum thickness of the first insulating member 14 to the thickness of the first wall 111 is too small, it cannot provide sufficient mechanical support, thereby affecting the overall structural stability of the battery cell 10.

[0142] Conversely, if the ratio of the maximum thickness of the first insulating member 14 to the thickness of the first wall 111 is too large, although it increases mechanical strength, it will occupy too much space, thereby reducing the internal space of the battery cell 10 and thus reducing the energy density of the battery. Therefore, setting the ratio of the maximum thickness of the first insulating member 14 to the thickness of the first wall 111 to be greater than or equal to 1 and less than or equal to 80 can balance the mechanical strength and energy density of the battery cell 10.

[0143] In the above technical solution, in the vertical direction, the ratio of the maximum thickness of the first insulating member 14 to the thickness of the first wall 111 is set to be greater than or equal to 1 and less than or equal to 80. This not only ensures that the first insulating member 14 and the first wall 111 have reasonable structural strength, but also effectively takes into account the energy density of the battery cell 10, thereby effectively improving the reliability of the battery cell 10.

[0144] It should be noted that the maximum thickness H3 of the first insulating component 14 and the thickness H4 of the first wall 111 can be measured using measuring tools such as a coordinate measuring machine, vernier calipers, and micrometers. The following description uses a coordinate measuring machine as an example to illustrate the measurement method for the maximum thickness H3 of the first insulating component 14 and the thickness H4 of the first wall 111. First, data points on the workpiece surface are acquired by contacting the probe of the coordinate measuring machine or by laser scanning. Then, geometric parameters such as the thickness are calculated based on these data points.

[0145] In some embodiments of this application, such as Figure 7 As shown, in the vertical direction, the ratio of the maximum thickness of the first insulating member 14 to the thickness of the first wall 111 is greater than or equal to 1 and less than or equal to 25. For example, the ratio of the maximum thickness H3 of the first insulating member 14 to the thickness H4 of the first wall 111 can be 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23 and 25.

[0146] In some embodiments of this application, such as Figure 7 As shown, in the vertical direction, the ratio of the maximum thickness of the first insulating member 14 to the thickness of the first wall 111 is greater than or equal to 3 and less than or equal to 15. For example, the ratio of the maximum thickness H3 of the first insulating member 14 to the thickness H4 of the first wall 111 can be 3, 5, 7, 9, 11, 13 and 15.

[0147] In some embodiments of this application, such as Figure 7 As shown, in the vertical direction, the ratio of the maximum thickness of the first insulating member 14 to the thickness of the first wall 111 is greater than or equal to 3 and less than or equal to 12.

[0148] For example, the ratio of the maximum thickness H3 of the first insulating member 14 to the thickness H4 of the first wall 111 can be 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12. Setting the ratio of the maximum thickness H3 of the first insulating member 14 to the thickness H4 of the first wall 111 to be greater than or equal to 3 and less than or equal to 12 can further optimize the ratio range of the maximum thickness H3 of the first insulating member 14 to the thickness H4 of the first wall 111, thereby further improving the rationality of the ratio of the maximum thickness H3 of the first insulating member 14 to the thickness H4 of the first wall 111.

[0149] In the above technical solution, by setting the ratio of the maximum thickness of the first insulating member 14 to the thickness of the first wall 111 to be greater than or equal to 3 and less than or equal to 12 in the vertical direction, the ratio range of the maximum thickness of the first insulating member 14 to the thickness of the first wall 111 can be further optimized, thereby further improving the reliability of the battery cell 10.

[0150] In some embodiments of this application, such as Figure 7As shown, in the vertical direction, the ratio of the maximum thickness of the first insulating member 14 to the thickness of the first wall 111 is greater than or equal to 4 and less than or equal to 12. For example, the ratio of the maximum thickness H3 of the first insulating member 14 to the thickness H4 of the first wall 111 can be 4, 5, 6, 7, 8, 9, 10, 11 and 12.

[0151] In some embodiments of this application, such as Figure 3 As shown, the top wall of the housing 11 is the second wall 112, and the battery cell 10 also includes a support plate 15, which is disposed between the electrode assembly and the second wall 112, and an exhaust space is formed between the support plate 15 and the second wall 112.

[0152] In some specific examples, such as Figure 3 As shown, the side wall of the housing 11 on the other side in the Z-direction is the top wall, that is, the side wall of the housing 11 on the other side in the Z-direction is the second wall 112. The first wall 111 and the second wall 112 are respectively located at both ends of the housing 11 in the Z-direction. The support plate 15 is located between the electrode body 131 and the second wall 112, and the support plate 15 and the second wall 112 are spaced apart in the Z-direction, that is, there is a gap between the support plate 15 and the second wall 112, which helps to safely vent air from inside the electrode body 131. In addition, the support plate 15 can provide support and fixation for the electrode body 131, reducing the risk of local decarburization of the electrode sheet caused by the swaying of the electrode body 131 inside the housing 11.

[0153] In the above technical solution, by placing the support plate 15 between the electrode assembly and the second wall 112, an exhaust space is formed between the support plate 15 and the second wall 112. This not only helps to exhaust the battery cell 10, thereby effectively improving the exhaust performance of the battery cell 10, but also effectively supports and fixes the electrode body 131, thereby effectively improving the reliability of the electrode body 131.

[0154] In some embodiments of this application, such as Figure 3 and Figure 8 As shown, the tray 15 includes: a tray body 151 and multiple support members. The tray body 151 is a horizontally arranged tray shape. The multiple support members are connected to the tray body 151 and are all arranged on the side of the tray body 151 facing the second wall 112.

[0155] For example, the number of support members can be two, four, six, eight, or more than ten. In some specific examples, such as... Figure 3 and Figure 8 As shown, there are six support members. Multiple support members are located between the plate body 151 and the second wall 112 and fixed on the side surface of the plate body 151 facing the second wall 112. This can effectively reduce the risk of the support members causing damage to the electrode body 131, thereby effectively protecting the electrode body 131.

[0156] Furthermore, the support is made of an insulating material with sufficient strength and rigidity. The support can be columnar, block-shaped, or rib-shaped. Multiple supports are supported between the second wall 112 and the support plate 15 to form an exhaust space. The exhaust space can be used to collect the gas escaping from the electrode body 131, thereby facilitating the exhaust of the battery cell 10.

[0157] In some specific examples, the thickness of the support member in the Z direction is greater than or equal to 0.1 mm and less than or equal to 3 mm. For example, the thickness of the support member in the Z direction can be 0.1 mm, 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, and 3 mm. Further, the thickness of the support member in the Z direction is greater than or equal to 0.3 mm and less than or equal to 1 mm. For example, the thickness of the support member in the Z direction can be 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, and 1 mm.

[0158] In the above technical solution, by setting a plate body 151 and multiple support members in the support plate 15, the plate body 151 is a horizontally arranged plate shape, and the multiple support members are connected to the plate body 151 and are all arranged on the side of the plate body 151 facing the second wall 112, it can not only effectively protect the electrode body 131, but also effectively simplify the structure of the plate body 151, thereby facilitating the manufacturing and assembly of the plate body 151, and thus effectively improving work efficiency.

[0159] In some embodiments of this application, such as Figure 8 As shown, multiple support members are arranged around the periphery of the plate body 151 and are spaced apart along the circumference of the plate body 151.

[0160] In some specific examples, such as Figure 8 As shown, the support members are rib-shaped, and multiple support members are respectively arranged on the edges of both ends of the plate body 151 in the Y direction, with the multiple plate bodies 151 spaced apart from each other. In this way, the multiple support members can provide reliable support for the support plate 15, reduce the deformation or displacement of the support plate 15 during use, and thus further fix and support the electrode body 131.

[0161] In the above technical solution, multiple support members are arranged around the periphery of the plate body 151 and spaced apart along the circumference of the plate body 151, so that the multiple support members can provide reliable support for the support plate 15, reduce the deformation or displacement of the support plate 15 during use, and thus further improve the stability and reliability of the electrode body 131.

[0162] In some embodiments of this application, such as Figure 8As shown, the plurality of support members include a first support member 1521 and a second support member 1522. The first support member 1521 is arranged on the plate body 151 in the length direction (e.g., Figure 8 The second support 1522 is arranged in the middle region of the plate body 151 in the length direction, with the two ends of the electrode assembly in the X direction shown in the figure.

[0163] In some specific examples, such as Figure 8 As shown, there are four first support members 1521, two of which are arranged at one end of the plate body 151 in the X direction, and the other two are arranged at the other end of the plate body 151 in the X direction. The multiple first support members 1521 can support and fix the two ends of the plate body 151 in the X direction, thereby effectively supporting and fixing the end region of the electrode body 131 in the X direction.

[0164] For example Figure 8 As shown, there are two second support members 1522. These two second support members 1522 are arranged in the central region of the plate body 151 in the X-direction and at both ends of the plate body 151 in the Y-direction. These multiple second support members 1522 can support and fix the plate body 151 in the central region of the X-direction, thereby effectively supporting and fixing the electrode body 131 in the central region of the X-direction. Thus, multiple support members can be evenly distributed on the surface of the plate body 151 facing the second wall 112, thereby effectively supporting and fixing the plate body 151, and thus effectively reducing the risk of displacement and deformation of the electrode body 131.

[0165] In the above technical solution, by arranging the first support member 1521 at both ends of the plate body 151 in the length direction to support the two ends of the electrode assembly in the length direction, and arranging the second support member 1522 in the middle area of ​​the plate body 151 in the length direction, multiple support members can be evenly distributed on the tray 15, thereby effectively reducing the risk of excessive local deformation or displacement of the tray 15, and thus effectively improving the durability of the tray 15.

[0166] In some embodiments of this application, such as Figure 3 As shown, a thinning groove is formed on the inner surface of the shell wall at the end of the shell 11 away from the first wall 111.

[0167] In some specific examples, such as Figure 3As shown, in the Z-direction, the inner surface of the shell wall at the end of the housing 11 away from the first wall 111 is recessed towards the outside of the battery cell 10 to form a thinning groove. That is, the thickness of the shell wall at the end of the housing 11 away from the first wall 111 is less than the thickness of the shell wall in other surrounding areas. This effectively increases the space of the receiving cavity inside the housing 11, thereby effectively increasing the space inside the battery cell 10 for storing the gas generated by the electrode body 131.

[0168] In the above technical solution, by forming a thinning groove on the inner surface of the shell wall at the end of the shell 11 away from the first wall 111, the space inside the battery cell 10 used to store the gas generated by the electrode body 131 can be effectively increased, thereby effectively improving the reliability of the battery cell 10.

[0169] In some embodiments of this application, such as Figure 3 As shown, the horizontal cross-section of the housing 11 is rectangular, and the thinning groove is formed at the corner of the top of the housing 11.

[0170] In some specific examples, such as Figure 3 As shown, the thinning groove is formed at the junction of the periphery of the second wall 112 and the arc transition of the side wall of the housing 11. When the battery cell 10 is inverted, the junction of the periphery of the second wall 112 and the arc transition of the side wall of the housing 11 is a non-critical load-bearing area. By performing thinning treatment at these locations, the gas generation space inside the battery cell 10 can be increased without significantly affecting the overall structural strength. Thus, the rationality of the position of the thinning groove can be effectively improved.

[0171] In the above technical solution, the horizontal cross-section of the housing 11 is set as a rectangle, and the thinning groove is formed at the corner of the top of the housing 11. This can increase the gas generation space inside the battery cell 10 without significantly affecting the overall structural strength, thereby effectively improving the rationality of the position of the thinning groove and thus effectively improving the reliability of the battery cell 10.

[0172] In some embodiments of this application, such as Figure 3 As shown, a portion of the shell wall at the end of the housing 11 opposite to the first wall 111 protrudes from the inside out to form a protrusion, which defines a compensation space inside the housing 11.

[0173] In some specific examples, such as Figure 3 As shown, in the Z direction, a portion of the shell wall at the end of the housing 11 away from the first wall 111 protrudes outward toward the battery cell 10 to form a protrusion. Due to the presence of the protrusion, an additional space is formed inside the housing 11, thereby effectively increasing the space of the receiving cavity inside the housing 11, and further effectively increasing the space inside the battery cell 10 for storing the gas generated by the electrode body 131.

[0174] In the above technical solution, by protruding a portion of the shell wall at the end of the shell 11 away from the first wall 111 from the inside out to form a protrusion, the protrusion defines a compensation space inside the shell 11, which can effectively increase the space inside the battery cell 10 for storing the gas generated by the electrode body 131, thereby effectively improving the reliability of the battery cell 10.

[0175] In some embodiments of this application, such as Figure 3 As shown, the horizontal cross-section of the housing 11 is rectangular, and the protrusion is formed at the corner of the top of the housing 11.

[0176] In some specific examples, such as Figure 3 As shown, the protrusion is formed at the arc transition junction between the periphery of the second wall 112 and the side wall of the housing 11. This effectively enhances the rigidity and structural strength of this area, improves its resistance to pressure and impact, and thus effectively improves the structural stability of the battery cell 10. In addition, the protrusion can be integrally processed by stamping, stretching, or die forming, thereby effectively reducing the processing difficulty.

[0177] In the above technical solution, by setting the horizontal cross-section of the housing 11 to a rectangle and forming the protrusion at the corner of the top of the housing 11, it is possible not only to effectively improve the rigidity and structural strength of the corner of the top of the housing 11, thereby effectively improving the structural stability of the battery cell 10, but also to effectively reduce the processing difficulty, thereby effectively improving the processing efficiency.

[0178] In some embodiments of this application, such as Figure 3 As shown, the housing 11 includes a main shell 113 and a cover plate 114. The bottom of the main shell 113 is open, and the cover plate 114 covers the open side of the main shell 113. The cover plate 114 is the first wall 111.

[0179] For example Figure 3 As shown, the main housing 113 is open on one side in the X direction, and a receiving cavity for placing the electrode assembly is formed in the main housing 113. The cover plate 114 is provided with the electrode post 12, and the conductive part 132 is located between the cover plate 114 and the electrode assembly. The cover plate 114 covers the open side of the main housing 113. Furthermore, the cover plate 114 can be sealed to the open side of the main housing 113 by welding.

[0180] The housing cavity of the main casing 113 serves as the primary load-bearing structure for the battery cell 10, accommodating electrode components, electrolyte, and other internal components. The cover plate 114 not only provides a seal but also integrates connecting components such as the terminal posts 12, facilitating connection of the battery cell 10 to other devices or components. By incorporating the main casing 113 and cover plate 114 within the housing 11, the assembly and disassembly of the battery cell 10 are facilitated, effectively improving the ease of maintenance for the battery cell 10.

[0181] In the above technical solution, by setting a main shell 113 and a cover plate 114 in the housing 11, the bottom of the main shell 113 is open, and the cover plate 114 covers the open side of the main shell 113. The cover plate 114 is the first wall 111, which can effectively improve the convenience of disassembly and maintenance of the battery cell 10, thereby effectively improving the work efficiency of disassembly and maintenance of the battery cell 10.

[0182] In some embodiments of this application, such as Figure 3 As shown, the conductive part 132 includes a tab 1321, which is connected between the electrode body 131 and the electrode post 12. The electrode post 12 and a portion of the tab 1321 are disposed in the manifold 141; or, the conductive part 132 includes a tab 1321 and an adapter plate 1322, which is connected to the electrode post 12. The tab 1321 is connected between the adapter plate 1322 and the electrode body 131. A portion of the tab 1321, the electrode post 12, and the adapter plate 1322 are disposed in the manifold 141.

[0183] For example, the conductive part 132 includes a tab 1321, one end of which is connected to the electrode body 131 and the other end is directly connected to the electrode post 12. A portion of the electrode post 12 and the tab 1321 are disposed in the manifold 141. When the battery cell 10 is inverted, the electrolyte can be in the manifold 141, thereby allowing the electrolyte to fully wet the electrode post 12 and the tab 1321, thus effectively improving the efficiency of electrolyte back absorption.

[0184] For example, the conductive part 132 includes a tab 1321 and an adapter plate 1322. One end of the tab 1321 is connected to the electrode body 131, and the other end is connected to the adapter plate 1322. The adapter plate 1322 is disposed between the tab 1321 and the terminal post 12. A part of the tab 1321, the terminal post 12 and the adapter plate 1322 are disposed in the current collector 141. When the battery cell 10 is inverted, the electrolyte can be in the current collector 141, thereby allowing the electrolyte to fully wet the terminal post 12, the tab 1321 and the adapter plate 1322, thereby effectively improving the efficiency of electrolyte back absorption.

[0185] In the above technical solution, by providing a tab 1321 in the conductive part 132, the tab 1321 is connected between the electrode body 131 and the terminal post 12, and a portion of the terminal post 12 and the tab 1321 are disposed in the current collector 141, which can effectively simplify the structure of the conductive part 132 and thus effectively save costs. By providing a tab 1321 and an adapter piece 1322 in the conductive part 132, the adapter piece 1322 is connected to the terminal post 12, and the tab 1321 is connected between the adapter piece 1322 and the electrode body 131, and a portion of the tab 1321, the terminal post 12 and the adapter piece 1322 are disposed in the current collector 141, which can improve the stability of the connection between the electrode body 131 and the terminal post 12, reduce the contact resistance, and facilitate modular integration, thereby effectively improving the reliability of the battery cell 10.

[0186] Secondly, such as Figure 2 As shown, an embodiment of this application provides a battery device 100, which includes a housing 20 and a battery cell 10 according to the first aspect of this application. The battery cell 10 is disposed inside the housing 20. The housing 20 includes a bottom plate 211 located at the bottom of the housing 20, and a terminal post 12 is disposed on the side of the housing 11 facing the bottom plate 211.

[0187] In some specific examples, such as Figure 2 As shown, multiple battery cells 10 are connected in series or parallel to form a complete battery module, thereby realizing the storage and transportation of electrical energy. Furthermore, the battery device 100 also includes a housing 20, which includes a main body 21 and a cover 22. The main body 21 is a rectangular parallelepiped with an open top, and the cover 22 seals the top of the main body 21. The periphery of the cover 22 is fastened to the periphery of the main body 21 by fasteners. Multiple battery cells 10 are stacked along the length of the housing 20 to form a battery cell 10 assembly, and the multiple battery cell 10 assemblies are arranged sequentially along the width of the housing 20. Further, a bottom plate 211 is provided at the bottom of the main body 21, and the terminals 12 of the battery cells 10 are located on the side of the housing 11 facing the bottom plate 211.

[0188] In the above technical solution, by setting the battery cell 10 of the first aspect in the battery device 100, when the battery cell 10 is inverted, the electrolyte can be collected in the manifold 141, thereby effectively improving the efficiency of electrolyte wetting and reabsorption, thereby accelerating the circulation of electrolyte, and thus effectively improving heat dissipation performance and improving the reliability of the battery device 100.

[0189] Thirdly, embodiments of this application provide an electrical device 1, which includes a battery device 100 according to the second aspect of this application.

[0190] For example Figure 1As shown, the electrical device 1 can be a vehicle. The vehicle 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. The vehicle is equipped with a battery device 100, which can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to supply power to the vehicle; for example, the battery device 100 can serve as the vehicle's operating power source.

[0191] The vehicle also includes a controller 200 and a motor 300. The controller 200 controls the battery unit 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle during starting, navigation, and driving. In some specific examples, the battery unit 100 can serve not only as the vehicle's operating power source but also as its driving power source, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0192] In the above technical solution, by setting the battery device 100 of the second aspect in the electrical device 1, when the battery cell 10 is inverted, the electrolyte can be collected in the manifold 141, thereby effectively improving the efficiency of electrolyte wetting and back absorption, thereby accelerating the circulation of electrolyte, and thus effectively improving heat dissipation performance and improving the reliability of the electrical device 1.

[0193] The following will refer to Figures 3-8 A battery cell 10 according to a specific embodiment of this application is described.

[0194] like Figures 3-8 As shown, the battery cell 10 includes a housing 11, a terminal post 12, an electrode assembly, a first insulating member 14, and a support plate 15.

[0195] like Figure 3 As shown, the battery cell 10 is in an inverted state. The side wall of the casing 11 on the Z-direction is the bottom wall, and the side wall of the casing 11 on the other side of the Z-direction is the top wall. That is, the side wall of the casing 11 on the Z-direction is the first wall 111, and the side wall of the casing 11 on the other side of the Z-direction is the second wall 112. The first wall 111 and the second wall 112 are respectively located at both ends of the casing 11 on the Z-direction. The terminal post 12 passes through the first wall 111 and extends along the Z-direction. There are two terminals 12, one of which is the positive terminal post 12 and the other is the negative terminal post 12. Current can enter and exit the battery cell 10 through the terminals 12.

[0196] Furthermore, an injection hole 1111 is formed on the first wall 111, which extends through the first wall 111 in the Z direction. The injection hole 1111 on the first wall 111 can be used to inject electrolyte into the battery cell 10. A pressure relief area is also provided on the first wall 111. The pressure relief area on the first wall 111 can release pressure when the pressure inside the battery cell 10 is too high, thereby effectively reducing the possibility of the battery cell 10 exploding or other dangerous situations.

[0197] like Figure 3 As shown, the electrode assembly includes an electrode body 131 and a conductive part 132. The electrode assembly is disposed within the housing 11. One end of the conductive part 132 is connected to the electrode body 131, and the other end of the conductive part 132 is connected to the electrode post 12. Further, there are two conductive parts 132, which are arranged at a distance in the X direction. The two conductive parts 132 are correspondingly arranged with the two electrode posts 12 and are located between the electrode body 131 and the electrode posts 12. In some specific examples, the electrode body 131 is an electrode winding core, which is formed by winding or stacking a combination of anode / diaphragm / cathode.

[0198] like Figure 3 and Figure 4 As shown, the first insulating member 14 includes an insulating body 142 and a filler 143. The insulating body 142 is disposed between the electrode body 131 and the first wall 111. The insulating body 142 has a through hole extending through it along the Z-direction. Further, there are two through holes, spaced apart along the X-direction, with each electrode post 12 correspondingly inserted into one of the through holes. The filler 143 is disposed on the insulating body 142 and located between the insulating body 142 and the electrode body 131. The filler 143 extends circumferentially along the through hole in a ring structure, thereby allowing the filler 143 and the insulating body 142 to together enclose a manifold 141 on the side facing the electrode assembly. Further, the insulating body 142 and the filler 143 are integrally formed. Figure 5 As shown, the ratio of the maximum thickness H3 of the first insulating member 14 to the thickness H4 of the first wall 111 is greater than or equal to 2 and less than or equal to 15.

[0199] like Figure 4 As shown, an clearance hole 1421 is formed on the insulating body 142, and the clearance hole 1421 penetrates the insulating body 142 along the Z direction. The liquid injection hole 1111 is directly opposite to and connected to the clearance hole 1421 in the Z direction. In the horizontal projection plane, the filler 143 is arranged at a distance from the clearance hole 1421. A pressure relief area is also provided on the first wall 111. An exhaust hole 1422 is formed on the insulating body 142, and the exhaust hole 1422 penetrates the insulating body 142 along the Z direction. The exhaust hole 1422 is directly opposite to and connected to the pressure relief area in the Z direction. In the horizontal projection plane, the filler 143 is arranged at a distance from the exhaust hole 1422.

[0200] like Figure 4 and Figure 5 As shown, the insulating body 142 has a boss 1423, which is located between the electrode body 131 and the insulating body 142. The boss 1423 extends in a ring shape along the circumference of the vent hole 1422, that is, the boss 1423 forms a raised structure around the vent hole 1422. Furthermore, in the Z direction, the thickness H1 of the filler 143 is less than or equal to the protrusion height H2 of the boss 1423.

[0201] like Figure 3 As shown, the support plate 15 is disposed between the electrode body 131 and the second wall 112, and the support plate 15 and the second wall 112 are spaced apart in the Z direction, forming an exhaust space between the support plate 15 and the second wall 112. Further, the support plate 15 includes a plate body 151 and multiple support members. The plate body 151 is a horizontally arranged plate shape, and the number of support members is six. The multiple support members are located between the plate body 151 and the second wall 112 and are fixed to the surface of the plate body 151 facing the second wall 112.

[0202] Furthermore, the multiple support members include a first support member 1521 and a second support member 1522. There are four first support members 1521, two of which are arranged at one end of the plate body 151 in the X direction and the other two are arranged at the other end of the plate body 151 in the X direction. There are two second support members 1522, which are arranged in the middle area of ​​the plate body 151 in the X direction and respectively at both ends of the plate body 151 in the Y direction.

[0203] Furthermore, in the Z-direction, the inner surface of the shell wall at the end of the shell 11 away from the first wall 111 is recessed toward the outside of the battery cell 10 to form a thinning groove. Further, the thinning groove is formed at the junction of the periphery of the second wall 112 and the arcuate transition of the side wall of the shell 11.

[0204] like Figure 3 As shown, the housing 11 includes a main housing 113 and a cover plate 114. The main housing 113 is open on one side in the X direction. A receiving cavity for placing the electrode assembly is formed in the main housing 113. An electrode post 12 is provided on the cover plate 114. A conductive part 132 is located between the cover plate 114 and the electrode assembly. The cover plate 114 covers the open side of the main housing 113. Furthermore, the cover plate 114 can be sealed to the open side of the main housing 113 by welding.

[0205] like Figure 3As shown, the conductive part 132 includes a tab 1321 and an adapter plate 1322. One end of the tab 1321 is connected to the electrode body 131, and the other end is connected to the adapter plate 1322. The adapter plate 1322 is disposed between the tab 1321 and the electrode post 12. A portion of the tab 1321, the electrode post 12, and the adapter plate 1322 are disposed in the junction groove 141.

[0206] When the battery cell 10 is inverted, the electrolyte inside the battery cell 10 can be collected in the manifold 141, thereby effectively improving the efficiency of electrolyte wetting and reabsorption, thereby accelerating the circulation of electrolyte, and thus effectively improving heat dissipation performance and enhancing the reliability of the battery device 100.

[0207] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. 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 cell (10), characterized in that, include: The shell (11) has a lower shell wall in the vertical direction that is a first wall (111); The pole post (12) is inserted through the first wall (111) and is disposed toward the lower side of the housing (11); An electrode assembly is disposed within the housing (11) and includes an electrode body (131) and a conductive part (132) connected to the electrode body (131), wherein the conductive part (132) is connected to the pole post (12); A first insulating member (14) is disposed inside the housing (11) and located between the electrode body (131) and the first wall (111). The first insulating member (14) has a converging groove (141) recessed towards the first wall (111) on one side surface facing the electrode body (131). The pole post (12) and / or the conductive part (132) are disposed in the converging groove (141).

2. The battery cell (10) according to claim 1, characterized in that, The first insulating element (14) includes: An insulating body (142) is supported between the electrode body (131) and the first wall (111). A through hole is formed on the insulating body (142) in the vertical direction. The pole post (12) is arranged on the radial inner side of the through hole. A filler (143) is provided on the side of the insulating body (142) facing the electrode body (131). The filler (143) is arranged around the through hole and extends in a ring shape along the circumference of the through hole. The filler (143) and the insulating body (142) cooperate to enclose the manifold (141).

3. The battery cell (10) according to claim 2, characterized in that, The insulating body (142) and the filler (143) are integrally formed, or the insulating body (142) and the filler (143) are separate parts.

4. The battery cell (10) according to claim 2, characterized in that, A liquid injection hole (1111) is formed on the first wall (111), and a clearance hole (1421) is formed on the insulating body (142) in the vertical direction. The liquid injection hole (1111) and the clearance hole (1421) are directly opposite to and connected. In the horizontal projection plane, the filler (143) and the clearance hole (1421) are arranged at intervals.

5. The battery cell (10) according to claim 2, characterized in that, The first wall (111) is provided with a pressure relief area, and the insulating body (142) is provided with an exhaust hole (1422) that runs through the insulating body (142) in the vertical direction. The exhaust hole (1422) is directly opposite to and connected to the pressure relief area. In the horizontal projection plane, the filler (143) is arranged at a distance from the exhaust hole (1422).

6. The battery cell (10) according to claim 5, characterized in that, The insulating body (142) has a boss (1423) located on the side of the insulating body (142) facing the electrode body (131) and extending in a ring shape along the circumference of the vent hole (1422).

7. The battery cell (10) according to claim 6, characterized in that, In the vertical direction, the thickness of the filler (143) is less than or equal to the protrusion height of the boss (1423).

8. The battery cell (10) according to claim 1, characterized in that, In the vertical direction, the ratio of the maximum thickness of the first insulating element (14) to the thickness of the first wall (111) is greater than or equal to 1 and less than or equal to 80.

9. The battery cell (10) according to claim 8, characterized in that, In the vertical direction, the ratio of the maximum thickness of the first insulating element (14) to the thickness of the first wall (111) is greater than or equal to 3 and less than or equal to 12.

10. The battery cell (10) according to claim 1, characterized in that, The top wall of the housing (11) is the second wall (112), and the battery cell (10) further includes a support plate (15), which is disposed between the electrode assembly and the second wall (112), and an exhaust space is formed between the support plate (15) and the second wall (112).

11. The battery cell (10) according to claim 10, characterized in that, The tray (15) includes: a tray body (151) and multiple support members. The tray body (151) is a horizontally arranged tray shape. The multiple support members are connected to the tray body (151) and are all arranged on the side of the tray body (151) facing the second wall (112).

12. The battery cell (10) according to claim 11, characterized in that, Multiple of the support members are arranged around the periphery of the plate body (151) and spaced apart circumferentially along the plate body (151).

13. The battery cell (10) according to claim 12, characterized in that, The plurality of support members include a first support member (1521) and a second support member (1522), the first support member (1521) being arranged at both ends of the plate body (151) in the length direction to support the two ends of the electrode assembly in the length direction, and the second support member (1522) being arranged in the middle region of the plate body (151) in the length direction.

14. The battery cell (10) according to claim 1, characterized in that, A thinning groove is formed on the inner surface of the shell wall at the end away from the first wall (111).

15. The battery cell (10) according to claim 14, characterized in that, The horizontal cross-section of the housing (11) is rectangular, and the thinning groove is formed at the corner of the top of the housing (11).

16. The battery cell (10) according to claim 1, characterized in that, A portion of the shell wall of the housing (11) at the end opposite to the first wall (111) protrudes from the inside out to form a protrusion, which defines a compensation space inside the housing (11).

17. The battery cell (10) according to claim 16, characterized in that, The horizontal cross-section of the housing (11) is rectangular, and the protrusion is formed at the corner of the top of the housing (11).

18. The battery cell (10) according to claim 1, characterized in that, The housing (11) includes a main shell (113) and a cover plate (114). The bottom of the main shell (113) is open, and the cover plate (114) covers the open side of the main shell (113). The cover plate (114) is the first wall (111).

19. The battery cell (10) according to claim 1, characterized in that, The conductive part (132) includes a tab (1321) connected between the electrode body (131) and the electrode post (12), and a portion of the electrode post (12) and the tab (1321) are disposed within the manifold (141); or, The conductive part (132) includes a tab (1321) and an adapter plate (1322). The adapter plate (1322) is connected to the pole post (12). The tab (1321) is connected between the adapter plate (1322) and the electrode body (131). A part of the tab (1321), the pole post (12) and the adapter plate (1322) are disposed in the manifold (141).

20. A battery device (100), characterized in that, The device includes a housing and a battery cell (10) according to any one of claims 1-19, the battery cell being disposed in the housing, the housing including a bottom plate at the bottom of the housing, and the terminal post being disposed on the side of the housing facing the bottom plate.

21. An electrical device (1), characterized in that, Includes the battery device (100) as described in claim 20.

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