Batteries and electrical equipment

Abstract

The embodiment of the present application provides a battery and an electrical device, wherein the battery includes an end plate and a battery pack. The battery pack includes a plurality of battery cells arranged along a first direction, and an end plate is provided on at least one side of the battery pack along the first direction. The end plate includes a first plate body and a second plate body. The first plate body includes a first end and a second end. The second plate body includes a third end and a fourth end, the third end is connected to the first end, the second end is connected to the fourth end, the second plate body and the first plate body jointly enclose a cavity, and the first plate body is located on the side of the second plate body away from the battery pack. The end plate is manufactured by the first plate body and the second plate body, thereby reducing the material cost of the end plate. The end plate is formed by connecting the third end of the second plate body through the first end of the first plate body and connecting the fourth end of the second plate body through the second end of the first plate body, thereby reducing the difficulty of forming the end plate, thereby reducing the manufacturing cost of the end plate, and further reducing the manufacturing cost of the battery.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0002] With the development of new energy technology, batteries are used more and more widely, such as in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc.

[0003] In the development of battery technology, in addition to improving the performance of batteries, the manufacturing cost of batteries is also an issue that needs to be considered. Therefore, how to reduce the manufacturing cost of batteries is an urgent problem to be solved in battery technology. Utility Model Content

[0004] The embodiments of the present application provide a battery and an electrical device to reduce the manufacturing cost of the battery.

[0005] In a first aspect, an embodiment of the present application provides a battery, comprising an end plate and a battery pack; the battery pack comprises a plurality of battery cells arranged along a first direction, and an end plate is provided on at least one side of the battery pack along the first direction; wherein the end plate comprises a first plate body and a second plate body; the first plate body comprises a first end and a second end; the second plate body comprises a third end and a fourth end, the third end is connected to the first end, the second end is connected to the fourth end, the second plate body and the first plate body jointly enclose a cavity, and the first plate body is located on the side of the second plate body facing away from the battery pack.

[0006] In the above technical solution, at least one side of the battery pack is provided with an end plate, and the end plate can limit the position of multiple battery cells. The second plate body is closer to the battery pack than the first plate body, so that when the battery cell expands, the second plate body can contact the battery cell, thereby limiting the expansion of the battery cell, and the cavity between the first plate body and the second plate body can absorb part of the expansion force of the battery cell, reducing the risk of damage between multiple battery cells due to excessive squeezing force. The cavity can reduce the material used for the end plate and reduce the weight of the end plate while meeting the mechanical strength of the end plate. The end plate is manufactured by the first plate body and the second plate body, which reduces the material cost of the end plate; the third end of the second plate body is connected to the third end of the second plate body through the first end of the first plate body and the fourth end of the second plate body is connected to form the end plate, which reduces the difficulty of forming the end plate, thereby reducing the manufacturing cost of the end plate, and further reducing the manufacturing cost of the battery. Therefore, such an end plate not only improves the performance of the battery, but also reduces the manufacturing cost of the battery.

[0007] In some embodiments, the first plate body further includes a first wall portion, and the second plate body further includes a second wall portion, the second wall portion and the first wall portion are arranged along the first direction, along the first direction, the cavity is located between the first wall portion and the second wall portion, the first wall portion partially protrudes in the direction close to the second wall portion to form a first convex portion, and the first convex portion abuts against the second wall portion. By forming the first convex portion on the first wall portion, the first convex portion can enhance the strength of the first wall portion and enhance the anti-deformation ability of the first wall portion. By abutting the first convex portion against the second wall portion, along the first direction, the first wall portion can support the second wall portion through the first convex portion, enhance the structural strength of the second wall portion, and reduce the risk of the second wall portion being damaged by the extrusion force along the first direction. When the battery cell expands along the first direction, the protruding direction of the first convex portion is opposite to the expansion direction of the battery cell, which helps to limit the expansion of the battery cell and extend the service life of the battery.

[0008] In some embodiments, the cavity penetrates the end plate along the second direction, and there are multiple first protrusions, which are arranged at intervals along the second direction, and the second direction intersects with the first direction. By forming multiple first protrusions on the first wall, on the one hand, the multiple first protrusions can enhance the resistance of the first wall to deformation. On the other hand, the multiple first protrusions can jointly support the second wall, improve the strength of the second wall, and reduce the risk of the second wall being damaged by the extrusion force along the first direction.

[0009] In some embodiments, along the first direction, the second wall portion partially protrudes toward the direction close to the first wall portion to form a second convex portion, and the second convex portion abuts against the first convex portion. By forming the second convex portion on the second wall portion, the second convex portion can enhance the structural strength of the second wall portion and improve the deformation resistance of the second wall portion. The second convex portion abuts against the first convex portion, so that the first convex portion of the first wall portion can support the second convex portion of the second wall portion, thereby realizing that the first wall portion supports the second wall portion, reducing the risk of the second wall portion being damaged by pressure.

[0010] In some embodiments, the second convex portion corresponds to the first convex portion one by one. One first convex portion corresponds to one second convex portion, and the first convex portion of the same specification can be formed on the first wall portion, and the second convex portion of the same specification can be formed on the second wall portion, which is convenient for processing the first convex portion and the second convex portion.

[0011] In some embodiments, the first convex portion is connected to the second convex portion by welding. By welding the first convex portion and the second convex portion, on the one hand, the connection and fixation of the first plate body and the second plate body can be achieved; on the other hand, the positions of the first convex portion and the second convex portion can be fixed, and the connection strength between the first convex portion and the second convex portion can be improved, thereby improving the strength of the end plate.

[0012] In some embodiments, along the first direction, a second groove is formed at a position corresponding to the second convex portion on a side of the second wall portion away from the first wall portion. By forming the second groove on the second wall portion, the second groove can improve the structural strength of the second wall portion. The second groove is conducive to the molding of the second convex portion, facilitates the processing of the second convex portion, and reduces the molding difficulty of the second wall portion.

[0013] In some embodiments, along the first direction, a first groove is formed at a position corresponding to the first convex portion on a side of the first wall portion away from the second wall portion. By forming the first groove on the first wall portion, the first groove can improve the structural strength of the first wall portion. The first groove is conducive to the molding of the first convex portion, facilitates the processing of the first convex portion, and reduces the molding difficulty of the first convex portion.

[0014] In some embodiments, the cavity passes through opposite ends of the end plate along the second direction; along the first direction, a third groove is formed on the side of the first wall portion away from the second wall portion, and the third groove extends to both ends of the first wall portion along the second direction, and the second direction intersects with the first direction; the battery also includes a binding member, and the binding member is configured to bind the end plate and the battery pack, and a part of the binding member is accommodated in the third groove. By forming the third groove on the first wall portion, the third groove can enhance the deformation resistance of the first wall portion. The third groove can limit the position of the binding member and reduce the risk of the binding member detaching from the first wall portion. By binding the end plate and the battery pack through the binding member, the binding member can constrain the position of the end plate and the battery pack. When the battery cell expands, the binding member can reduce the expansion of the battery cell by binding the end plate, thereby alleviating the phenomenon of reduced performance of the battery cell and extending the service life of the battery cell.

[0015] In some embodiments, the first wall portion is formed with a plurality of third grooves, the plurality of third grooves are arranged at intervals along the third direction, and the first direction, the second direction and the third direction are not coplanar and intersect with each other. By forming a plurality of third grooves arranged at intervals along the third direction, binding pieces can be arranged in the plurality of third grooves, thereby improving the binding effect of the binding piece and reducing the risk of binding failure of the binding piece.

[0016] In some embodiments, the first plate body further includes a first wall portion, the first end portion and the second end portion are arranged opposite to each other along a third direction, and along the third direction, the first end portion and the second end portion are respectively connected to two ends of the first wall portion; wherein the first end portion and the second end portion both extend from the first wall portion in a direction away from the second plate body. By arranging the first end portion and the second end portion to extend in a direction away from the second plate body, the strength of the first end portion and the second end portion along the extension direction thereof can be improved, thereby enhancing the strength of the first plate body along the extension direction of the first end portion, and further enhancing the strength of the end plate in the extension direction of the first end portion. When the battery cell expands along the first direction, such a structure improves the structural strength of the end plate along the first direction, thereby offsetting part of the expansion force, reducing the expansion amount of the battery cell, and extending the service life of the battery.

[0017] In some embodiments, the first end and the third end are stacked along the third direction; and / or the second end and the fourth end are stacked along the third direction. By stacking the first end and the third end, the contact area between the first end and the third end can be increased, so that the connection between the first end and the third end is more stable. By stacking the second end and the fourth end, the contact area between the second end and the fourth end can be increased, so that the connection between the second end and the fourth end is more stable, thereby improving the deformation resistance of the end plate.

[0018] In some embodiments, the second plate body further includes a second wall portion, a first connection portion and a second connection portion, the second wall portion and the first wall portion are arranged along the first direction, the third end portion, the second wall portion, the first connection portion, the second connection portion and the fourth end portion are connected in sequence, the third end portion and the first connection portion are both arranged opposite to the fourth end portion along the third direction, along the third direction, the fourth end portion is closer to the third end portion than the first connection portion, the first plate body is located between the third end portion and the fourth end portion, and the first direction intersects with the third direction. The first wall portion and the second wall portion are arranged along the first direction, the first end portion, the second end portion, the third end portion and the fourth end portion all extend along the first direction, which can enhance the strength of the first plate body and the second plate body along the first direction, thereby enhancing the strength of the end plate along the first direction. The fourth end portion is closer to the third end portion than the first connection portion and the first plate body is located between the third end portion and the fourth end portion, which can make the size of the second plate body along the third direction larger than the size of the first plate body along the third direction, so that the second plate body has a larger surface contacting the battery cell to support the battery cell.

[0019] In some embodiments, the battery further includes a first cover and a support member, the first cover and the support member are arranged relative to each other along a third direction, the battery pack is arranged between the first cover and the support member along the third direction, the support member supports the battery pack, the end plate connects the first cover and the support member, and the third direction intersects with the first direction. The first cover and the support member are connected by the end plate, the first cover and the support member can fix the position of the end plate, when the battery cell expands, the first cover and the support member can restrain the position of the end plate, and reduce the expansion amount of the battery cell, thereby alleviating the phenomenon of reduced performance of the battery cell. The battery pack is arranged between the first cover and the support member, the first cover and the support member can protect the battery pack and reduce the risk of damage to the battery pack.

[0020] In some embodiments, the second end and the fourth end are stacked along the third direction to form an overlapping area, and the overlapping area is connected to the first cover body. The overlapping area is connected to the first cover body, which can make the connection between the end plate and the first cover body more stable and improve the connection strength between the end plate and the first cover body.

[0021] In some embodiments, along the third direction, a mounting beam is provided on the side of the first cover body facing the support member, and the overlapping area is connected to the first cover body through the mounting beam; along the first direction, a portion of the end plate is located between the battery cell and the mounting beam; wherein the overlapping area abuts against the side of the mounting beam facing the support member. The first cover body and the end plate are connected by the mounting beam, so that the connection between the overlapping area and the first cover body is more convenient.

[0022] In a second aspect, an embodiment of the present application provides an electrical device, comprising a battery provided by any embodiment of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0025] Figure 2 A schematic diagram of the structure of a battery provided in some embodiments of the present application;

[0026] Figure 3 A schematic diagram of the structure of an end plate provided in some embodiments of the present application;

[0027] Figure 4 A schematic diagram of the structure of an end plate provided in some other embodiments of the present application;

[0028] Figure 5 A schematic diagram of the structure of a first plate body provided in some embodiments of the present application;

[0029] Figure 6 A schematic diagram of the structure of a second plate provided in some embodiments of the present application;

[0030] Figure 7 A schematic diagram of the structure of a second plate body provided in some other embodiments of the present application;

[0031] Figure 8 A schematic structural diagram of a first plate body provided in some other embodiments of the present application;

[0032] Fig. 9 A schematic diagram of the structure of an end plate provided in some further embodiments of the present application;

[0033] Fig.10 An exploded view of a battery provided for some other embodiments of the present application;

[0034] Fig.11 A schematic structural diagram of a battery cell, a first cover, a support plate, an end plate and a mounting beam provided in some embodiments of the present application.

[0035] Icon: 1000-vehicle; 100-battery; 10-end plate; 10a-cavity; 1-first plate; 11-first end; 111-first end; 12-second end; 121-second end; 13-first wall; 131-first convex portion; 132-first surface; 133-first groove; 134-third groove; 2-second plate; 21-third end; 211-third end; 22-fourth end; 221-fourth end; 23-second wall; 231-second convex portion part; 232-second surface; 233-second groove; 24-first connecting part; 25-second connecting part; 3-fold; 4-overlapping area; 5-first rivet; 6-second rivet; 20-battery pack; 201-battery cell; 30-second cover; 40-binding piece; 50-first cover; 60-support piece; 70-mounting beam; 701-hollow structure; 702-inclined plate; 200-controller; 300-motor; X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0038] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0039] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0041] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0042] The term "plurality" used in the present application refers to two or more (including two).

[0043] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0044] Battery cells include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, and the like.

[0045] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.

[0046] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0047] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.

[0048] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0049] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0050] In some embodiments, the battery includes a plurality of battery cells and an end plate. Along the arrangement direction of the plurality of battery cells, the plurality of battery cells are disposed on one side of the end plate, and the end plate is useful for limiting the position of the battery cells.

[0051] In order to reduce the weight of the battery and achieve lightweight battery, a cavity can be set in the end plate. The cavity can also improve the mechanical strength of the end plate, and can also absorb external vibration and impact, reducing the risk of damage to the internal structure of the battery.

[0052] When manufacturing the end plate, the end plate can be manufactured by casting, and a casting mold structure is provided to form a cavity on the cast end plate, thereby reducing the weight of the end plate. However, casting is difficult to process and has a high processing cost.

[0053] In view of this, in order to reduce the manufacturing cost of the end plate, and thus reduce the manufacturing cost of the battery. The embodiment of the present application provides a battery, including an end plate and a plurality of battery cells. The plurality of battery cells are arranged on one side of the end plate, and a cavity is formed inside the end plate. The end plate includes a first plate body and a second plate body. The second plate body and the first plate body together enclose a cavity.

[0054] While the cavity meets the mechanical strength of the end plate, it can also reduce the material used for the end plate and reduce the weight of the end plate. The end plate is manufactured by the plate material, which reduces the material cost of the end plate. The end plate is manufactured by the first plate body and the second plate body, which reduces the material cost of the end plate. The end plate is enclosed by the first plate body and the second plate body, which effectively reduces the difficulty of forming the end plate, thereby reducing the manufacturing cost of the end plate. Such an end plate not only reduces the weight of the end plate through the cavity, but also reduces the manufacturing cost of the end plate, thereby reducing the manufacturing cost of the battery.

[0055] The end plate described in the embodiment of the present application is suitable for batteries and electrical equipment using batteries.

[0056] Electrical equipment can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys and electric tools, etc. Vehicles can be fuel vehicles, gas vehicles or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles and spacecrafts, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc.

[0057] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0058] Please refer to Figure 1 , Figure 1 The schematic diagram of the structure of the vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 is provided with a battery 100 inside, and the battery 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000, for example, the battery 100 can be used as an operating power source of the vehicle 1000.

[0059] The vehicle 1000 may further include a controller 200 and a motor 300 , wherein the controller 200 is used to control the battery 100 to supply power to the motor 300 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 1000 .

[0060] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0061] Please refer to Figure 2 and Figure 3 , Figure 2 A schematic diagram of the structure of a battery 100 provided in some embodiments of the present application; Figure 3A schematic diagram of the structure of the end plate 10 provided for some embodiments of the present application. An embodiment of the present application provides a battery 100, including an end plate 10 and a battery pack 20. The battery pack 20 includes a plurality of battery cells 201 arranged along a first direction X, and an end plate 10 is provided on at least one side of the battery pack 20 along the first direction X. Among them, the end plate 10 includes a first plate body 1 and a second plate body 2. The first plate body 1 includes a first end 11 and a second end 12. The second plate body 2 includes a third end 21 and a fourth end 22, the third end 21 is connected to the first end 11, the second end 12 is connected to the fourth end 22, and the second plate body 2 and the first plate body 1 jointly enclose a cavity 10a. The first plate body 1 is located on the side of the second plate body 2 facing away from the battery pack 20.

[0062] The number of the end plate 10 may be one, the multiple battery cells 201 are arranged along the first direction X, and the end plate 10 is disposed on one side of the battery cell 201 along the first direction X. The number of the end plate 10 may also be two, the two battery cells 201 are arranged along the first direction X, and the end plate 10 is disposed on both sides of the battery cell 201 along the first direction X.

[0063] The end plate 10 may be in contact with a battery cell 201 that is closest to the end plate 10 , so that the end plate 10 can directly limit the position of the battery cell 201 , thereby also limiting the amount of expansion of the battery cell 201 ; or the end plate 10 and a battery cell 201 that is closest to the end plate 10 may be spaced apart to allow a certain amount of expansion for the battery cell 201 , so that when the battery cell 201 expands to contact the end plate 10 , the further expansion of the battery cell 201 is limited by the end plate 10 .

[0064] The first plate body 1 and the second plate body 2 may both be metal plates, and the material of the metal plates may be aluminum, iron, steel, aluminum alloy, etc. The first plate body 1 and the second plate body 2 together enclose a cavity 10a, and the first plate body 1 may be a bent structure formed by bending a plate, and the second plate body 2 may be a flat plate structure; the second plate body 2 may be a bent structure formed by bending a plate, and the first plate body 1 may be a flat plate structure; the first plate body 1 may be a bent structure formed by bending a plate, and the second plate body 2 may be a bent structure formed by bending another plate.

[0065] The first end 11 and the second end 12 are both ends of the first plate body 1, and the first end 11 and the second end 12 can be an area close to the two ends of the first plate body 1. The two ends of the first plate body 1 are the first end 111 and the second end 121, respectively. The area from the first end 111 to the position at a first preset distance from the first end 111 is the first end 11, and the area from the second end 121 to the position at a second preset distance from the second end 121 is the second end 12. The second preset distance and the first preset distance can be equal or different, and the second preset distance and the first preset distance are both less than half of the total length of the first plate body 1. Taking the first plate body 1 as a bending structure formed by bending a plate as an example, the first plate body 1 is formed with a plurality of folds 3, and the area from the first end 111 to the fold 3 closest to the first end 111 can be the first end 11, and the area from the second end 121 to the fold 3 closest to the second end 121 can be the second end 12.

[0066] The third end 21 and the fourth end 22 are both ends of the second plate body 2, and the third end 21 and the fourth end 22 can be an area close to the two ends of the second plate body 2. The two ends of the second plate body 2 are the third end 211 and the fourth end 221, respectively. The area from the third end 211 to the position at a third preset distance from the third end 211 is the third end 21, and the area from the fourth end 221 to the position at a fourth preset distance from the fourth end 221 is the fourth end 22. The third preset distance and the fourth preset distance can be equal or unequal, and the third preset distance and the fourth preset distance are both less than half of the total length of the second plate body 2. Taking the second plate body 2 as a bending structure formed by bending a plate as an example, the second plate body 2 is formed with a plurality of folds 3, and the area from the third end 211 to the fold 3 closest to the third end 211 can be the third end 21, and the area from the fourth end 221 to the fold 3 closest to the fourth end 221 can be the fourth end 22.

[0067] The first end 11 is connected to the third end 21, and the first end 11 and the third end 21 may be stacked to form an overlapping area, or the first end 111 of the first end 11 is connected to the third end 211 of the third end 21. The first end 11 and the third end 21 may be welded, bonded, etc.

[0068] The second end 12 is connected to the fourth end 22, and the second end 12 and the fourth end 22 may be stacked to form an overlapping area, or the first end 111 of the second end 12 is connected to the third end 211 of the fourth end 22. The second end 12 and the fourth end 22 may be welded, bonded, etc.

[0069] The cavity 10 a may be a structure within the end plate 10 , and the end plate 10 seals the cavity 10 a ; or the cavity 10 a may be communicated with the outside of the end plate 10 .

[0070] The battery pack 20 may be one, and one end plate 10 may be provided on one side of the battery pack 20 along the first direction X, or one end plate 10 may be provided on both sides of the battery pack 20 along the first direction X. The battery pack 20 may be multiple, and multiple battery packs 20 may be arranged along the second direction Y, and the first direction X is perpendicular to the second direction Y; wherein multiple battery packs 20 may share two end plates 10, and the two end plates 10 may be provided on both sides of the multiple battery packs 20 along the first direction X; or each battery pack 20 may be provided with an end plate 10 at both ends along the first direction X. As an example, Figure 2 As shown, the battery 100 includes two battery packs 20, the two battery packs 20 are arranged along the second direction Y, the two battery packs 20 share two end plates 10, and the two end plates 10 are respectively located at two ends of the battery pack 20 along the first direction X.

[0071] The multiple battery cells 201 of the battery pack 20 can be connected in series, in parallel or in a mixed connection. When there are multiple battery packs 20, the multiple battery packs 20 can be connected in series, in parallel or in a mixed connection.

[0072] In the embodiment of the present application, at least one side of the battery pack 20 is provided with an end plate 10, and the end plate 10 can limit the position of multiple battery cells 201. The second plate 2 is closer to the battery pack 20 than the first plate 1, so that when the battery cell 201 expands, the second plate 2 can contact the battery cell 201, thereby limiting the expansion of the battery cell 201. The cavity 10a between the first plate 1 and the second plate 2 can absorb part of the expansion force of the battery cell 201, reducing the risk of damage between multiple battery cells 201 due to excessive squeezing force. While meeting the mechanical strength of the end plate 10, the cavity 10a can also reduce the material used for the end plate 10 and reduce the weight of the end plate 10. The end plate 10 is manufactured by the first plate body 1 and the second plate body 2, which reduces the material cost of the end plate 10; the end plate 10 is formed by connecting the third end 21 of the second plate body 2 through the first end 11 of the first plate body 1 and connecting the fourth end 22 of the second plate body 2 through the second end 12 of the first plate body 1, which reduces the difficulty of forming the end plate 10, thereby reducing the manufacturing cost of the end plate 10, and further reducing the manufacturing cost of the battery 100. Therefore, such an end plate 10 not only improves the performance of the battery 100, but also reduces the manufacturing cost of the battery 100.

[0073] In some embodiments, please refer to Figure 3The first plate body 1 further includes a first wall portion 13, and the second plate body 2 further includes a second wall portion 23. The second wall portion 23 and the first wall portion 13 are arranged along the first direction X. Along the first direction X, the cavity 10a is located between the first wall portion 13 and the second wall portion 23. The first wall portion 13 partially protrudes toward the direction close to the second wall portion 23 to form a first convex portion 131, and the first convex portion 131 abuts against the second wall portion 23.

[0074] The battery cell 201 may be a first wall portion 13 having a first surface 132 facing the second wall portion 23, the second wall portion 23 having a second surface 232 facing the first wall portion 13, the first protrusion 131 protruding from the first surface 132 and abutting against the second surface 232 of the second wall portion 23; or the second wall portion 23 may have a protrusion, the protrusion may be arranged facing the battery pack 20, and may also be arranged facing the first protrusion 131, the protrusion may enhance the strength of the second wall portion 23, the first protrusion 131 contacts the protrusion of the second wall portion 23, so that the first protrusion 131 abuts against the second wall portion 23.

[0075] The first convex portion 131 may be one or more. The first plate body 1 may be formed by stamping to form the first convex portion 131 on the first wall portion 13; or a protrusion protruding from the first surface 132 may be provided on the first wall portion 13 to form the first convex portion 131. The first convex portion 131 may contact the second wall portion 23 to achieve the first convex portion 131 abutting against the second wall portion 23, or the first convex portion 131 may be connected to the second wall portion 23 to achieve the first convex portion 131 abutting against the second wall portion 23. When the first convex portion 131 is connected to the second wall portion 23, the first convex portion 131 and the second wall portion 23 may be connected by welding, riveting, bonding, etc.

[0076] By forming the first convex portion 131 on the first wall portion 13, the first convex portion 131 can improve the strength of the first wall portion 13 and improve the anti-deformation ability of the first wall portion 13. By abutting the first convex portion 131 against the second wall portion 23, along the first direction X, the first wall portion 13 can support the second wall portion 23 through the first convex portion 131, thereby improving the structural strength of the second wall portion 23 and reducing the risk of the second wall portion 23 being damaged by the extrusion force along the first direction X.

[0077] In some embodiments, please refer to Figure 3 The cavity 10a penetrates the end plate 10 along the second direction Y. There are a plurality of first protrusions 131 . The plurality of first protrusions 131 are arranged at intervals along the second direction Y. The second direction Y intersects with the first direction X.

[0078] The first direction X and the second direction Y may form an acute angle, an obtuse angle or a right angle. As an example, the first direction X is perpendicular to the second direction Y.

[0079] As an example, Figure 3 As shown, the first wall portion 13 is formed with four first protrusions 131 , the second wall portion 23 has a second surface 232 facing the first wall portion 13 , and the first protrusions 131 protrude along the first direction X to abut against the second surface 232 of the second wall portion 23 .

[0080] By forming a plurality of first protrusions 131 on the first wall portion 13, on the one hand, the plurality of first protrusions 131 can enhance the resistance to deformation of the first wall portion 13. On the other hand, the plurality of first protrusions 131 can jointly support the second wall portion 23, thereby increasing the strength of the second wall portion 23 and reducing the risk of the second wall portion 23 being damaged by the extrusion force along the first direction X. When the battery cell 201 expands along the first direction X, the protrusion direction of the first protrusion 131 is opposite to the expansion direction of the battery cell 201, which helps to limit the expansion of the battery cell 201 and prolong the service life of the battery 100.

[0081] In some embodiments, please refer to Figure 4 , Figure 4 The schematic diagram of the structure of the end plate 10 provided in some embodiments of the present application is as follows: Along the first direction X, the second wall portion 23 partially protrudes toward the direction close to the first wall portion 13 to form a second protrusion 231 , and the second protrusion 231 abuts against the first protrusion 131 .

[0082] The number of the second convex portions 231 may be one or more. The second wall portion 23 may be formed by stamping to form the second convex portion 231 on the second surface 232 of the second wall portion 23; or the second surface 232 of the second wall portion 23 may be provided with a protrusion to form the second convex portion 231. The first convex portion 131 may be in contact with the second convex portion 231 to achieve the second convex portion 231 abutting against the first convex portion 131; or the first convex portion 131 may be connected to the second convex portion 231 to achieve the second convex portion 231 abutting against the first convex portion 131. When the first convex portion 131 is connected to the second convex portion 231, the first convex portion 131 and the second convex portion 231 may be connected by welding, bonding, riveting, etc.

[0083] The second convex portions 231 may correspond to the first convex portions 131 one by one, and one second convex portion 231 may abut against one first convex portion 131. Alternatively, the number of the first convex portions 131 may be greater than the number of the second convex portions 231, and a portion of the first convex portions 131 may abut against the second convex portions 231 respectively, while another portion of the first convex portions 131 abuts against the second surface 232 of the second wall portion 23.

[0084] One second protrusion 231 may abut against a plurality of first protrusions 131 ; or a plurality of second protrusions 231 may abut against one first protrusion 131 .

[0085] By forming the second convex portion 231 on the second wall portion 23, the second convex portion 231 can enhance the structural strength of the second wall portion 23 and improve the anti-deformation capability of the second wall portion 23. The second convex portion 231 abuts against the first convex portion 131, so that the first convex portion 131 of the first wall portion 13 can support the second convex portion 231 of the second wall portion 23, thereby realizing that the first wall portion 13 supports the second wall portion 23, and the convex direction of the second convex portion 231 is opposite to the convex direction of the first convex portion 131, which helps to reduce the stretching length of the first convex portion 131 and the second convex portion 231 during molding, and improve the strength of the first plate body 1 and the second plate body 2, thereby improving the anti-deformation capability of the first wall portion 13 and the second wall portion 23, and reducing the risk of the second wall portion 23 being damaged by limiting the expansion of the battery pack 20.

[0086] In some embodiments, please refer to Figure 4-Figure 6 , Figure 5 A schematic diagram of the structure of the first plate body 1 provided in some embodiments of the present application; Figure 6 The second plate 2 is a schematic structural diagram of some embodiments of the present application. The second convex portion 231 corresponds to the first convex portion 131 one by one.

[0087] As an example, see Figure 4-Figure 6 There are four first protrusions 131 , which protrude from the first surface 132 of the first wall portion 13 ; there are four second protrusions 231 , which protrude from the second surface 232 of the second wall portion 23 ; and one first protrusion 131 corresponds to one second protrusion 231 .

[0088] In the above embodiment, a first protrusion 131 is provided corresponding to a second protrusion 231 , and a first protrusion 131 of the same specification can be formed on the first wall portion 13 , and a second protrusion 231 of the same specification can be formed on the second wall portion 23 , which facilitates the processing of the first protrusion 131 and the second protrusion 231 .

[0089] In some embodiments, the first protrusion 131 is connected to the second protrusion 231 by welding.

[0090] The first convex parts 131 and the second convex parts 231 may correspond to each other one by one, and one first convex part 131 may be welded to one second convex part 231. Alternatively, the number of the first convex parts 131 may be greater than the number of the second convex parts 231, a part of the first convex parts 131 may correspond to each other one by one, each second convex part 231 may be welded to one first convex part 131, and another part of the first convex parts 131 may be welded to the second surface 232 of the second wall part 23.

[0091] By welding the first protrusion 131 and the second protrusion 231, on the one hand, the connection and fixation of the first plate body 1 and the second plate body 2 can be achieved; on the other hand, the positions of the first protrusion 131 and the second protrusion 231 can be fixed, and the connection strength between the first protrusion 131 and the second protrusion 231 can be improved, thereby improving the strength of the end plate 10.

[0092] In some embodiments, please refer to Figure 6 and Figure 7 , Figure 7 The schematic diagram of the structure of the second plate body 2 provided in some embodiments of the present application is as follows: Along the first direction X, a second groove 233 is formed at a position corresponding to the second protrusion 231 on a side of the second wall portion 23 away from the first wall portion 13 .

[0093] As an example, Figure 6 and Figure 7 As shown, the second plate body 2 can be formed into four second grooves 233 on the second wall portion 23 by stamping, and four second protrusions 231 can be correspondingly formed on the second surface 232 of the second wall portion 23 .

[0094] By forming the second groove 233 in the second wall portion 23, the second groove 233 can improve the structural strength of the second wall portion 23. The second groove 233 is conducive to the molding of the second convex portion 231, facilitates the processing of the second convex portion 231, and reduces the molding difficulty of the second wall portion 23.

[0095] In some embodiments, please refer to Figure 5 and Figure 8 , Figure 8 The schematic diagram of the structure of the first plate body 1 provided in some embodiments of the present application is as follows: Along the first direction X, a first groove 133 is formed at a position corresponding to the first protrusion 131 on a side of the first wall portion 13 away from the second wall portion 23 .

[0096] As an example, Figure 5 and Figure 8 As shown, the first plate body 1 can be formed into four first grooves 133 on the first wall portion 13 by stamping and molding, and four first protrusions 131 are correspondingly formed on the first surface 132 of the first wall portion 13 .

[0097] By forming the first groove 133 in the first wall portion 13, the first groove 133 can improve the structural strength of the first wall portion 13. The first groove 133 is conducive to the molding of the first convex portion 131, facilitates the processing of the first convex portion 131, and reduces the molding difficulty of the first convex portion 131.

[0098] In some embodiments, please refer to Figure 4 and Fig. 9 , Fig. 9A schematic diagram of the structure of the end plate 10 provided in some embodiments of the present application. The cavity 10a passes through the opposite ends of the end plate 10 along the second direction Y. Along the first direction X, a third groove 134 is formed on the side of the first wall portion 13 away from the second wall portion 23, and the third groove 134 extends to the two ends of the first wall portion 13 along the second direction Y, and the second direction Y intersects with the first direction X. The battery 100 also includes a binding member 40, which is configured to bind the end plate 10 and the battery pack 20, and a portion of the binding member 40 is accommodated in the third groove 134.

[0099] There may be one third groove 134; one third groove 134 may accommodate one binding member 40, or one third groove 134 may accommodate multiple binding members 40. There may also be multiple third grooves 134, and the multiple third grooves 134 are arranged at intervals along the third direction Z, and one third groove 134 accommodates one binding member 40, and the first direction X, the second direction Y and the third direction Z are not coplanar and intersect each other.

[0100] The number of the binding members 40 may be one or more, and the binding members 40 and the third grooves 134 may correspond one to one, or one third groove 134 may accommodate a part of the plurality of binding members 40 .

[0101] By forming the third groove 134 in the first wall portion 13, the third groove 134 can improve the anti-deformation capability of the first wall portion 13. The third groove 134 can limit the position of the binding member 40, reducing the risk of the binding member 40 being separated from the first wall portion 13. By binding the end plate 10 and the battery pack 20 with the binding member 40, the binding member 40 can constrain the position of the end plate 10 and the battery pack 20. When the battery cell 201 expands, the binding member 40 can reduce the expansion of the battery cell 201 by binding the end plate 10, thereby alleviating the phenomenon of reduced performance of the battery cell 201 and extending the service life of the battery cell 201.

[0102] In some embodiments, the first wall portion 13 is formed with a plurality of third grooves 134 , and the plurality of third grooves 134 are arranged at intervals along the third direction Z. The first direction X, the second direction Y and the third direction Z are not coplanar and intersect with each other.

[0103] Any two of the first direction X, the second direction Y, and the third direction Z may be at an acute angle, an obtuse angle, or a right angle.

[0104] As an example, Fig. 9 As shown, there are two third grooves 134 , which are arranged at intervals along the third direction Z and both penetrate the first wall portion 13 along the second direction Y. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0105] By forming a plurality of third grooves 134 spaced apart along the third direction Z, the binding members 40 can be disposed in each of the plurality of third grooves 134 , thereby improving the binding effect of the binding members 40 and reducing the risk of binding failure of the binding members 40 .

[0106] In some embodiments, the first plate body 1 further includes a first wall portion 13, and the first end portion 11 and the second end portion 12 are arranged opposite to each other along the third direction Z. Along the third direction Z, the first end portion 11 and the second end portion 12 are respectively connected to two ends of the first wall portion 13. The first end portion 11 and the second end portion 12 both extend from the first wall portion 13 in a direction away from the second plate body 2.

[0107] The first plate body 1 may be bent twice to form a fold 3 at the connection between the first end 11 and the first wall portion 13 and at the connection between the second end 12 and the first wall portion 13, so that both the first end 11 and the second end 12 extend from the first wall portion 13 in a direction away from the second plate body 2.

[0108] By arranging the first end 11 and the second end 12 to extend in a direction away from the second plate body 2, the strength of the first end 11 and the second end 12 along the extension direction can be improved, thereby enhancing the strength of the first plate body 1 along the extension direction of the first end 11, and further enhancing the strength of the end plate 10 in the extension direction of the first end 11. When the battery cell 201 expands along the first direction X, such a structure improves the structural strength of the end plate 10 along the first direction X, thereby offsetting part of the expansion force, reducing the expansion amount of the battery cell 201, and extending the service life of the battery 100.

[0109] In some embodiments, the first end portion 11 and the third end portion 21 are stacked along the third direction Z. And / or, the second end portion 12 and the fourth end portion 22 are stacked along the third direction Z.

[0110] The first end 11 and the third end 21 are stacked along the third direction Z so that one surface of the first end 11 fits with one surface of the third end 21. The second end 12 and the fourth end 22 are stacked along the third direction Z so that one surface of the second end 12 fits with one surface of the fourth end 22.

[0111] It is possible that only the first end 11 and the third end 21 are stacked along the third direction Z; it is also possible that only the second end 12 and the fourth end 22 are stacked along the third direction Z; it is also possible that the first end 11 and the third end 21 are stacked along the third direction Z and the second end 12 and the fourth end 22 are stacked along the third direction Z.

[0112] By stacking the first end 11 and the third end 21, the contact area between the first end 11 and the third end 21 can be increased, so that the connection between the first end 11 and the third end 21 is more stable. By stacking the second end 12 and the fourth end 22, the contact area between the second end 12 and the fourth end 22 can be increased, so that the connection between the second end 12 and the fourth end 22 is more stable, thereby improving the deformation resistance of the end plate 10.

[0113] In some embodiments, the second plate body 2 also includes a second wall portion 23, a first connecting portion 24 and a second connecting portion 25. The second wall portion 23 and the first wall portion 13 are arranged along the first direction X, and the third end 21, the second wall portion 23, the first connecting portion 24, the second connecting portion 25 and the fourth end 22 are connected in sequence. The third end 21 and the first connecting portion 24 are both arranged opposite to the fourth end 22 along the third direction Z. Along the third direction Z, the fourth end 22 is closer to the third end 21 than the first connecting portion 24. The first plate body 1 is located between the third end 21 and the fourth end 22, and the first direction X intersects with the third direction Z.

[0114] As an example, Fig. 9 As shown, the second plate body 2 can be bent multiple times to form four folds 3 extending along the second direction Y on the second plate body 2, thereby separating the second plate body 2 into a third end 21, a second wall portion 23, a first connecting portion 24, a second connecting portion 25 and a fourth end 22 that are connected in sequence. The first plate body 1 is located between the third end 21 and the fourth end 22.

[0115] In the above embodiment, the first wall portion 13 and the second wall portion 23 are arranged along the first direction X, and the first end portion 11, the second end portion 12, the third end portion 21 and the fourth end portion 22 all extend along the first direction X, which can enhance the strength of the first plate body 1 and the second plate body 2 along the first direction X, thereby enhancing the strength of the end plate 10 along the first direction X. The fourth end portion 22 is closer to the third end portion 21 than the first connecting portion 24, and the first plate body 1 is located between the third end portion 21 and the fourth end portion 22, so that the size of the second plate body 2 along the third direction Z can be greater than the size of the first plate body 1 along the third direction Z, so that the second plate body 2 has a larger surface contacting the battery cell 201 to support the battery cell 201.

[0116] In some embodiments, please refer to Fig.10 , Fig.10The exploded diagram of the battery 100 provided in some embodiments of the present application. The battery 100 further includes a first cover 50 and a support member 60, the first cover 50 and the support member 60 are arranged opposite to each other along a third direction Z, along the third direction Z, the battery pack 20 is arranged between the first cover 50 and the support member 60, the support member 60 supports the battery pack 20, the end plate 10 connects the first cover 50 and the support member 60, and the third direction Z intersects with the first direction X.

[0117] As an example, Fig.10 As shown, the battery 100 includes a first cover 50, a support 60, a second cover 30, two end plates 10 and a plurality of battery packs 20, wherein the plurality of battery packs 20 are disposed between the first cover 50 and the support 60, and the two end plates 10 are connected to the first cover 50 and the support 60, and the two end plates 10 are disposed on both sides of the first cover 50 along a first direction X, so that the first cover 50 limits the two end plates 10 to move away from each other, thereby limiting the expansion of the battery cell 201 through the end plates 10. The second cover 30 and the first cover 50 cooperate to form a box body with a receiving space. The first cover 50, the battery cell 201 and the end plates 10 are all located in the receiving space.

[0118] The first cover 50 and the support 60 are connected by the end plate 10, and the first cover 50 and the support 60 can fix the position of the end plate 10. When the battery cell 201 expands, the first cover 50 and the support 60 can restrain the position of the end plate 10 and reduce the expansion of the battery cell 201, thereby alleviating the phenomenon of reduced performance of the battery cell 201. The battery pack 20 is arranged between the first cover 50 and the support 60, and the first cover 50 and the support 60 can protect the battery pack 20 and reduce the risk of damage to the battery pack 20.

[0119] In some embodiments, please refer to Fig.10 and Fig.11 , Fig.11 The schematic diagram of the structure of the battery cell 201, the first cover 50, the support plate, the end plate 10 and the mounting beam 70 provided in some embodiments of the present application. The second end 12 and the fourth end 22 are stacked along the third direction Z to form an overlapping area 4, which is connected to the first cover 50.

[0120] As an example, Fig.11 As shown, along the first direction X, the battery cell 201 is arranged close to the second plate body 2, and the first plate body 1 supports the second plate body 2 along the first direction X. The end plate 10 connects the first cover body 50 and the second cover body 30, wherein along the third direction Z, the second end 12 and the fourth end 22 are stacked along the third direction Z and form an overlapping area 4, and the overlapping area 4 is connected to the first cover body 50.

[0121] The overlapping area 4 is connected to the first cover body 50 , which can make the connection between the end plate 10 and the first cover body 50 more stable and improve the connection strength between the end plate 10 and the first cover body 50 .

[0122] In some embodiments, please refer to Fig.11 Along the third direction Z, a mounting beam 70 is provided on the side of the first cover 50 facing the support member 60, and the overlapping area 4 is connected to the first cover 50 through the mounting beam 70. Along the first direction X, a portion of the end plate 10 is located between the battery cell 201 and the mounting beam 70. The overlapping area 4 abuts against the side of the mounting beam 70 facing the support member 60.

[0123] As an example, Fig.11 As shown, the mounting beam 70 is a hollow structure 701, and the mounting beam 70 is mounted on the side of the first cover body 50 facing the second cover body 30. The overlapping area 4 is connected to the mounting beam 70 through the first rivet 5, and a part of the first rivet 5 is located in the hollow structure 701 of the mounting beam 70. The mounting beam 70 has an inclined plate 702, and the second connecting portion 25 is arranged facing the inclined plate 702 and is located between the inclined plate 702 and the battery cell 201. When the battery cell 201 expands to squeeze the end plate 10, the inclined plate 702 cooperates with the second connecting portion 25 to restrain the expansion of the battery cell 201. The fourth end 22 of the second plate body 2 is connected to the support plate through the second rivet 6, and a part of the second rivet 6 is located in the cavity 10a.

[0124] The first cover body 50 and the end plate 10 are connected by the mounting beam 70, so that the connection between the overlapping area 4 and the first cover body 50 is more convenient.

[0125] An embodiment of the present application provides an electrical device, including the end plate 10 provided by any one of the above embodiments or the battery 100 provided by any one of the above embodiments.

[0126] Please continue to refer to Figure 4-Figure 11. The embodiment of the present application provides a battery 100, which includes a support member 60, a first cover 50, two mounting beams 70, two end plates 10 and a plurality of battery packs 20 including battery cells 201. The plurality of battery packs 20 are arranged along the second direction Y, the battery pack 20 includes a plurality of battery cells 201 arranged along the first direction X, and the two end plates 10 are disposed on both sides of the plurality of battery packs 20 along the first direction X. The support member 60 connects the two end plates 10, and the support member 60 is used to support the battery pack 20. The battery pack 20 is located between the first cover 50 and the support member 60, and the mounting beam 70 is disposed on a side of the first cover 50 facing the battery pack 20. The two end plates 10 are respectively mounted on the two mounting beams 70, and a portion of the end plates 10 is located between the mounting beams 70 and the battery pack 20 along the first direction X. Among them, the end plate 10 includes a first plate body 1 and a second plate body 2, and the first plate body 1 and the second plate body 2 enclose a cavity 10a. The first plate body 1 includes a first wall portion 13, a first end portion 11 and a second end portion 12, the first end portion 11 and the second end portion 12 are arranged opposite to each other along a third direction Z, and the first wall portion 13 connects the first end portion 11 and the second end portion 12. The second plate body 2 includes a third end portion 21, a second wall portion 23, a first connecting portion 24, a second connecting portion 25, and a fourth end portion 22 connected in sequence, the third end portion 21 and the fourth end portion 22 are arranged opposite to each other, and the first wall portion 13 and the second wall portion 23 are arranged opposite to each other along a first direction X. The first wall portion 13 is formed with a first protrusion 131, and the second wall portion 23 is formed with a second protrusion 231, the second protrusion 231 abuts against the first protrusion 131, and the first protrusion 131 and the second protrusion 231 are welded and connected. The first wall portion 13 is also formed with a third groove 134 for accommodating the binding piece 40.

[0127] In the above embodiment, the support member 60 can support the battery pack 20 and improve the restraining ability of the end plate 10 on the battery pack 20 by fixing the position of the end plate 10. The end plate 10 is connected to the first cover body 50 through the mounting beam 70, so that the connection between the end plate 10 and the first cover body 50 is more convenient. For the end plate 10, the cavity 10a can reduce the material used for the end plate 10 and reduce the weight of the end plate 10 while meeting the mechanical strength of the end plate 10. The end plate 10 is manufactured by the first plate body 1 and the second plate body 2, which reduces the material cost of the end plate 10; the third end 21 of the second plate body 2 is connected by the first end 11 of the first plate body 1 and the fourth end 22 of the second plate body 2 is connected by the second end 12 of the first plate body 1 to form the end plate 10, which reduces the difficulty of forming the end plate 10, thereby reducing the manufacturing cost of the end plate 10. By providing the first protrusion 131 and the second protrusion 231, the first protrusion 131 and the second protrusion 231 can respectively enhance the strength of the first plate body 1 and the second plate body 2, thereby enhancing the structural strength of the end plate 10. The third groove 134 can enhance the structural strength of the first plate body 1, and can also accommodate the binding member 40, which is used to bind the end plate 10 and the battery pack 20. When the battery cell 201 expands, the binding member 40 can reduce the expansion amount of the battery cell 201 by binding the end plate 10, thereby alleviating the phenomenon of the degradation of the use performance of the battery cell 201 and extending the service life of the battery cell 201. By molding the end plate 10 with the first plate body 1 and the second plate body 2, the molding difficulty of the end plate 10 is reduced, thereby reducing the manufacturing cost of the end plate 10, and further reducing the manufacturing cost of the battery 100. Therefore, such an end plate 10 not only improves the use performance of the battery 100, but also reduces the manufacturing cost of the battery 100.

[0128] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0129] The above embodiments are only used to illustrate the technical solution of the present application and are not used to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery, characterized in that: include: End plate; A battery pack, comprising a plurality of battery cells arranged along a first direction, wherein the end plate is disposed on at least one side of the battery pack along the first direction; Wherein, the end plate comprises: A first plate body, comprising a first end and a second end; The second plate body includes a third end and a fourth end, the third end is connected to the first end, the fourth end is connected to the second end, the second plate body and the first plate body together enclose a cavity, and the first plate body is located on a side of the second plate body away from the plurality of battery cells.

2. The battery according to claim 1, characterized in that The first plate body also includes a first wall portion, and the second plate body also includes a second wall portion. The second wall portion and the first wall portion are arranged along the first direction. Along the first direction, the cavity is located between the first wall portion and the second wall portion. The first wall portion partially protrudes toward the direction close to the second wall portion to form a first convex portion, and the first convex portion abuts against the second wall portion.

3. The battery according to claim 2, characterized in that The cavity penetrates the end plate along a second direction. There are a plurality of first protrusions, which are arranged at intervals along the second direction. The second direction intersects with the first direction.

4. The battery according to claim 2, characterized in that Along the first direction, the second wall portion partially protrudes toward the direction close to the first wall portion to form a second convex portion, and the second convex portion abuts against the first convex portion.

5. The battery according to claim 4, characterized in that The second convex portions correspond one to one with the first convex portions.

6. The battery according to claim 4, characterized in that The first protrusion is connected to the second protrusion by welding.

7. The battery according to claim 4, characterized in that Along the first direction, a second groove is formed at a position of the second wall portion at a side of the second wall portion away from the first wall portion and corresponding to the second protrusion.

8. The battery according to claim 2, characterized in that Along the first direction, a first groove is formed at a position of the first wall portion at a side facing away from the second wall portion and corresponding to the first protrusion.

9. The battery according to claim 2, characterized in that The cavity passes through two opposite ends of the end plate along the second direction; A third groove is formed on a side of the first wall portion away from the second wall portion along the first direction, and the third groove extends to two ends of the first wall portion along the second direction, and the second direction intersects the first direction; The battery further includes a binding member configured to bind the end plate and the battery pack, and a portion of the binding member is received in the third groove.

10. The battery according to claim 9, characterized in that The first wall portion is formed with a plurality of the third grooves, and the plurality of the third grooves are arranged at intervals along the third direction. The first direction, the second direction and the third direction are not coplanar and intersect with each other.

11. The battery according to any one of claims 1 to 10, characterized in that The first plate body further includes a first wall portion, the first end portion and the second end portion are arranged opposite to each other along a third direction, and along the third direction, the first end portion and the second end portion are respectively connected to two ends of the first wall portion; Wherein, the first end portion and the second end portion both extend from the first wall portion in a direction away from the second plate body.

12. The battery according to claim 11, characterized in that The first end portion and the third end portion are stacked along the third direction; and / or the second end portion and the fourth end portion are stacked along the third direction.

13. The battery according to claim 11, characterized in that The second plate body also includes a second wall portion, a first connecting portion and a second connecting portion, the second wall portion and the first wall portion are arranged along a first direction, the third end portion, the second wall portion, the first connecting portion, the second connecting portion and the fourth end portion are connected in sequence, the third end portion and the first connecting portion are both arranged opposite to the fourth end portion along the third direction, along the third direction, the fourth end portion is closer to the third end portion than the first connecting portion, the first plate body is located between the third end portion and the fourth end portion, and the first direction intersects with the third direction.

14. The battery according to any one of claims 1 to 10, characterized in that The battery also includes a first cover body and a support member, the first cover body and the support member are arranged opposite to each other along a third direction, along the third direction, the battery pack is arranged between the first cover body and the support member, the support member supports the battery pack, the end plate connects the first cover body and the support member, and the third direction intersects with the first direction.

15. The battery according to claim 14, characterized in that The second end portion and the fourth end portion are stacked along the third direction to form an overlapping area, and the overlapping area is connected to the first cover body.

16. The battery according to claim 15, characterized in that Along the third direction, a mounting beam is provided on a side of the first cover body facing the support member, and the overlapping area is connected to the first cover body through the mounting beam; Along the first direction, a portion of the end plate is located between the battery cell and the mounting beam; Wherein, the overlapping area abuts against a side of the mounting beam facing the support member.

17. An electrical equipment, characterized in that: Comprising the battery according to any one of claims 1-16.

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