Battery and electric equipment

Abstract

The embodiment of the utility model provides a battery and electric equipment. The battery comprises an end plate and a battery pack, a cavity is formed in the end plate; the end plates are integrally formed by bending plates, and the plates define a cavity. The battery pack comprises a plurality of single batteries arranged in the first direction, and an end plate is arranged on at least one side of the battery pack in the first direction. At least one side of the battery pack is provided with an end plate, and the end plate can limit the positions of the plurality of single batteries. The cavity is formed in the end plate, and under the condition that the mechanical strength of the end plate is met, the material consumption of the end plate can be reduced, and the weight of the end plate is reduced. The end plate is made of plates, so that the material cost of the end plate is reduced. The end plate is formed by bending the plate, so that the forming difficulty of the end plate is reduced, the processing of the end plate is more convenient, the manufacturing cost of the end plate is reduced, and the manufacturing cost of the battery is further reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to batteries and electrical equipment. 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; a cavity is formed inside the end plate; the end plate is formed by integrally bending a plate, and the plate encloses the cavity; 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.

[0006] In the above technical solution, at least one side of the battery pack is provided with an end plate, which can limit the position of multiple battery cells. A cavity is formed inside the end plate, which 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 plate material, which reduces the material cost of the end plate. The end plate is formed by bending the plate, which reduces the difficulty of forming the end plate, makes the processing of the end plate more convenient, reduces the manufacturing cost of the end plate, and thus reduces the manufacturing cost of the battery.

[0007] In some embodiments, the end plate includes a first wall portion, a second wall portion, and a support portion; the first wall portion and the second wall portion are arranged opposite to each other along a first direction, and a cavity is located between the first wall portion and the second wall portion; the support portion is located in the cavity and supports the first wall portion and the second wall portion along the first direction. The support portion supports the first wall portion and the second wall portion along the first direction, and when the end plate is subjected to force along the first direction, the support portion can reduce the deformation of the end plate along the first direction, enhance the strength of the end plate along the first direction, and make the structure of the end plate more stable. When the battery cell of the battery pack expands, the support portion of the end plate can offset part of the expansion force, thereby reducing the expansion amount of the battery cell and extending the service life of the battery.

[0008] In some embodiments, the support portion includes a first bending section, a second bending section, and a third bending section; the first bending section abuts against the first wall; the second bending section abuts against the second wall; and the third bending section connects the first bending section and the second bending section. The third bending section connects the first bending section abutting against the first wall and the second bending section abutting against the second wall, and the third bending section can support the first wall and the second wall, thereby improving the structural strength of the end plate. By connecting the first bending section and the second bending section through the third bending section, it is convenient to realize the bending forming of the support portion, and the first bending section and the second bending section can improve the structural stability of the third bending section, reduce the risk of the third bending section offsetting the support of the first wall and the second wall, thereby improving the limiting effect of the end plate on the expansion of the battery cell.

[0009] In some embodiments, there are multiple third bending segments, and the multiple third bending segments are arranged at intervals along the second direction. Along the second direction, the first bending segments and the second bending segments are arranged alternately, and the first direction intersects the second direction. By arranging multiple third bending segments, the multiple third bending segments can all support the first wall portion and the second wall portion, thereby enhancing the structural strength of the first wall portion and the second wall portion; the third bending segments are arranged at intervals along the second direction, and the third bending segments can divide the cavity into multiple sections along the second direction, thereby improving the anti-deformation ability of the cavity.

[0010] In some embodiments, the support portion further includes a fourth bending section, the fourth bending section having a first end and a second end opposite to each other, the second end being connected to a second bending section, the first end being fixed to the first wall portion, and the first end being one end of the plate. By connecting the second end of the fourth bending section to the second bending section, and fixing the first end of the fourth bending section to the first wall portion, the fourth bending section can be supported between the second wall portion and the first wall portion, thereby enhancing the strength of the end plate. By fixing the first end, which is one end of the plate, to the first wall portion, the structure of the end plate can be stabilized, and the stability of the fourth bending section can be enhanced by fixing the position of the first end, thereby stabilizing the positions of the first bending section, the second bending section, and the third bending section, thereby improving the stability of the support portion.

[0011] In some embodiments, the fourth bending section is welded to the first wall portion. By welding the fourth bending section to the first wall portion, the connection strength between the fourth bending section and the first wall portion can be improved, and the risk of the fourth bending section falling off the first wall portion can be reduced.

[0012] In some embodiments, the first bending section is welded to the first wall portion; and / or, the second bending section is welded to the second wall portion. By welding the first bending section to the first wall portion, the connection strength between the first bending section and the first wall portion can be improved, and the structural stability of the first bending section can be improved. By welding the second bending section to the second wall portion, the connection strength between the second bending section and the second wall portion can be improved, and the structural stability of the second bending section can be improved. The first bending section and the second bending section are welded to the first wall portion and the second wall portion respectively, which can improve the structural stability of the third bending section, thereby making the third bending section support the first wall portion and the second wall portion more stably, improving the structural strength of the end plate, and reducing the risk of the end plate being damaged by force along the first direction.

[0013] In some embodiments, the support portion has a first end, the first end is one end of the plate, and the first end is fixed to the first wall portion. By using the first end of the support portion as one end of the plate, the support portion is located between the first wall portion and the second wall portion, so that one end of the plate is fixed between the first wall portion and the second wall portion, reducing the risk of the end of the plate being exposed to the outside of the end plate and being damaged or falling off.

[0014] In some embodiments, along the first direction, a first groove is formed on one side of the first wall portion facing the second wall portion, and the first end is inserted into the first groove. By inserting the first end into the first groove, the first end can be restricted in the first groove, reducing the risk of the first end being separated from the first wall portion, so that the structure of the end plate is more stable.

[0015] In some embodiments, the first wall portion partially protrudes in a direction away from the second wall portion to form a first convex portion at a position corresponding to the first groove. By bending the first groove to form the first convex portion, the concave space of the first groove can be increased, which helps the first end to be inserted into the first groove and improves the fixing effect of the first groove on the first end.

[0016] In some embodiments, the end plate further includes a third wall portion and a fourth wall portion, the third wall portion and the fourth wall portion are arranged opposite to each other along the second direction, the cavity is located between the third wall portion and the fourth wall portion, the third wall portion connects the first wall portion and the second wall portion, the fourth wall portion connects the second wall portion and the support portion, and the first direction intersects with the second direction. By connecting the first wall portion and the second wall portion through the third wall portion, and connecting the second wall portion and the support portion through the fourth wall portion, the plate can be bent and formed into the end plate, which is convenient for the processing of the end plate. The third wall portion connects the first wall portion and the second wall portion to improve the structural strength between the first wall portion and the second wall portion, and reduce the risk of compression damage between the first wall portion and the second wall portion. The fourth wall portion connects the second wall portion and the support portion to improve the structural strength between the second wall portion and the support portion, and reduce the risk of compression damage between the second wall portion and the support portion.

[0017] In some embodiments, the first wall portion partially protrudes in a direction facing the second wall portion to form a second protrusion, so as to form a second groove at a position corresponding to the second protrusion on a side of the first wall portion away from the second wall portion, and the second groove runs through both ends of the first wall portion along a third direction, and the third 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 part of the binding member is accommodated in the second groove. By providing a second protrusion to form a second groove at a position corresponding to the second protrusion, the second groove can accommodate the binding member to stabilize the position of the binding member and reduce the risk of the binding member falling off the end plate, thereby stabilizing the binding effect of the binding member on the battery pack and the end plate. When the battery cell expands, the battery cell squeezes the end plate, and the binding member can bind the end plate to reduce the amount of expansion of the battery cell, thereby extending the service life of the battery.

[0018] In some embodiments, the first wall portion is formed with a plurality of second grooves, which are arranged at intervals along the second direction, and the first direction, the second direction and the third direction are not coplanar and intersect each other. The plurality of second grooves are conducive to arranging a plurality of binding members on the end plate, thereby stabilizing the positions of the plurality of binding members and reducing the risk of the plurality of binding members falling off the end plate.

[0019] In some embodiments, the support portion is formed with a third groove, and the second protrusion is at least partially accommodated in the third groove. By accommodating at least part of the second protrusion in the third groove, the third groove can limit the movement of the second protrusion, so that the positions of the second groove and the third groove are relatively stable, thereby improving the structural strength of the support portion and the first wall portion, and improving the structural stability of the end plate.

[0020] In some embodiments, the support portion includes a plurality of continuously arranged bending segments, and the third groove is defined by three adjacent bending segments. The third groove is defined by three adjacent bending segments, and the plurality of bending segments improve the structural stability of the support portion, and the second convex portion is at least partially accommodated in the third groove, thereby improving the structural strength of the support portion and the first wall portion.

[0021] In some embodiments, the plurality of bending segments include at least one second bending segment, the second bending segment abuts against the second wall portion, and the second convex portion and the second bending segment are arranged opposite to each other along the first direction. The second bending segment is connected to the second wall portion, so that the third groove is connected to the second wall portion, and the second convex portion is at least partially accommodated in the third groove, so that the position of the second convex portion is more stable, thereby improving the structural strength of the second convex portion.

[0022] In some embodiments, the cavity runs through two opposite ends of the end plate, which reduces the difficulty of forming the end plate and saves the material usage of the end plate.

[0023] In some embodiments, the cavity passes through two opposite ends of the end plate along a third direction; a second groove is provided on the outer surface of the end plate, and the second groove passes through two ends of the end plate along a third direction, and the third 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 part of the binding member is accommodated in the second groove. By providing a second groove that passes through both ends of the end plate along the third direction, part of the binding member can be accommodated in the second groove, thereby increasing the contact area between the binding member and the end plate, improving the connection stability between the end plate and the binding member, and reducing the risk of the binding member detaching from the end plate. When the battery cell expands, the battery cell squeezes the end plate, and the binding member can restrain the end plate to reduce the expansion of the battery cell, thereby extending the service life of the battery.

[0024] In some embodiments, the battery further comprises a first cover and a support, the first cover and the support are arranged relative to each other along a second direction, a plurality of battery cells are arranged between the first cover and the support along the second direction, the support supports the plurality of battery cells, the end plate connects the first cover and the support, the second direction intersects with the first direction; the end plate comprises a first wall portion and a second wall portion, the first wall portion and the second wall portion are arranged relative to each other along the first direction, the cavity is located between the first wall portion and the second wall portion; the second wall portion is closer to the battery cell than the first wall portion, and the first wall portion is connected to the first cover. By arranging the plurality of battery cells between the first cover and the support, the first cover and the support can protect the battery cells and reduce the risk of damage to the battery cells, the end plate connects the first cover and the support, the first cover and the support can limit the position of the end plate, and when the battery cells expand and squeeze the end plate, the restraining effect of the end plate on the battery cells is enhanced. By setting the second wall portion closer to the battery cell than the first wall portion, the second wall portion can contact the battery cell to alleviate the expansion of the battery cell. The end plate can be connected to the first cover body through the first wall portion, and the position of the end plate can be limited by the first cover body to limit the expansion of the battery cell.

[0025] In some embodiments, along the first direction, the first wall portion partially protrudes in a direction away from the second wall portion to form a first protrusion, and the first protrusion is connected to the first cover body. The first protrusion is connected to the first cover body to achieve the installation of the end plate and the first cover body. The first protrusion protrudes in a direction away from the second wall portion, which is conducive to alleviating the expansion of the battery cell and improving the performance of the battery.

[0026] In some embodiments, a mounting beam is provided on the side of the first cover body facing the support member along the second direction; a portion of the end plate is located between the battery cell and the mounting beam along the first direction; wherein the first protrusion abuts against the side of the mounting beam facing the support member and is mounted on the mounting beam. By disposing a portion of the end plate between the battery cell and the mounting beam, the mounting beam can limit the movement of the end plate, thereby alleviating the expansion of the battery cell. The first protrusion is mounted on the mounting beam, thereby fixing the position of the end plate, making the installation of the end plate more stable.

[0027] In some embodiments, the mounting beam includes a first connection portion, a second connection portion, and a third connection portion connected in sequence, the first connection portion and the third connection portion are spaced apart along a first direction, and the first connection portion and the third connection portion are both connected to the first cover body, the second connection portion and the first cover body are arranged oppositely along a second direction, a portion of the end plate is located between the battery cell and the third connection portion, and the first protrusion is connected to the side of the second connection portion facing the support member. By arranging the first connection portion and the third connection portion at intervals along the first direction and the second connection portion and the first cover body being arranged oppositely along the second direction, the mounting beam and the first cover body can form a cavity structure, and the mounting beam can offset the installation stress inside the battery and reduce the risk of battery damage. A portion of the end plate is located between the battery cell and the third connection portion, and the third connection portion can support the end plate to enhance the restraining effect of the end plate on the battery cell.

[0028] In some embodiments, along the third direction, the size of the mounting beam is smaller than or equal to the size of the end plate, and the first direction, the second direction and the third direction are perpendicular to each other. When the size of the mounting beam is smaller than or equal to the size of the end plate, the end plate separates the mounting beam from the battery cell, reducing the risk of the mounting beam contacting the battery cell and affecting the insulation performance of the battery cell.

[0029] 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

[0030] 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.

[0031] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0032] Figure 2 A schematic diagram of the structure of a battery provided in some embodiments of the present application;

[0033] Figure 3 A schematic diagram of the structure of an end plate provided in some embodiments of the present application;

[0034] Figure 4 A schematic diagram of the structure of the end plate provided in some other embodiments of the present application;

[0035] Figure 5 A schematic diagram of the structure of an end plate provided in some further embodiments of the present application;

[0036] Figure 6 An exploded view of a battery provided for some other embodiments of the present application;

[0037] Figure 7 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.

[0038] Icons: 1000-vehicle; 100-battery; 10-end plate; 10a-cavity; 10b-interval; 10c-crease; 101-plate; 1011-third end; 1012-fourth end; 1-first wall; 11-first groove; 12-first convex portion; 121-first mounting hole; 13-second convex portion; 14-second groove; 15-transition section; 2-second wall; 3-support portion; 31-first bending section; 32-second bending section; 33-third bending section; 34-fourth bending section; 341-first end ;342-second end;35-third groove;4-third wall;5-fourth wall;6-first rivet;7-second rivet;20-battery pack;201-battery cell;30-second cover;40-binding piece;50-first cover;60-support piece;70-mounting beam;701-first connecting part;702-second connecting part;703-third connecting part;704-hollow cavity;705-second mounting hole;200-controller;300-motor;X-first direction;Z-second direction;Y-third direction. DETAILED DESCRIPTION

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] The term "plurality" used in the present application refers to two or more (including two).

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0053] 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.

[0054] In order to reduce the weight of the end plate 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, absorb external vibration and impact, and reduce the risk of damage to the internal structure of the battery.

[0055] 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.

[0056] In view of this, in order to reduce the manufacturing cost of the end plate, and thus reduce the manufacturing cost of the battery, an 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. The end plate is formed by integrally bending the plate to form a cavity.

[0057] 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 plate material, which reduces the material cost of the end plate. The end plate is formed by bending the plate, which reduces the difficulty of forming the end plate, makes the processing of the end plate more convenient, and reduces 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.

[0058] The battery described in the embodiments of the present application is suitable for use in electrical equipment using the battery.

[0059] 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.

[0060] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0061] 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.

[0062] 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 .

[0063] 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.

[0064] Please refer to Figure 2-Figure 4 , Figure 2 A schematic diagram of the structure of a battery 100 provided in some embodiments of the present application; Figure 3 A schematic diagram of the structure of the end plate 10 provided in some embodiments of the present application;

[0065] Figure 4 Schematic diagram of the structure of the end plate 10 provided for some other embodiments of the present application. The embodiment of the present application provides a battery 100, including an end plate 10 and a battery pack 20. A cavity 10a is formed inside the end plate 10. The end plate 10 is formed by integrally bending a plate 101, and the plate 101 encloses the cavity 10a. The battery pack 20 includes a plurality of battery cells 201 arranged along a first direction X, and the end plate 10 is provided on at least one side of the battery pack 20 along the first direction X.

[0066] The number of the end plates 10 may be one, the multiple battery cells 201 are arranged along the first direction X, and the end plates 10 are arranged on one side of the battery pack 20 along the first direction X. The number of the end plates 10 may also be two, the multiple battery cells 201 are arranged along the first direction X, and the end plates 10 are arranged on both sides of the battery cells 201 along the first direction X.

[0067] 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 .

[0068] The end plate 10 can be formed by bending a plate 101. After the plate 101 is bent, the ends can be connected to form a closed structure to define the cavity 10a, or the areas near the two ends of the plate 101 can form overlapping areas to form a closed structure to define the cavity 10a. The plate 101 can be bent by roller bending.

[0069] The material of the end plate 10 can be aluminum, aluminum alloy, iron, stainless steel, etc. For example, the end plate 10 is formed by bending an aluminum plate.

[0070] The plate 101 is bent to form folds 10c on the plate 101. The extending directions of all folds 10c may be parallel to one direction, or the extending direction of a part of folds 10c may intersect with the extending direction of another part of folds 10c.

[0071] 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 .

[0072] 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 Z, and the first direction X is perpendicular to the second direction Z; 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 a plurality of battery packs 20 , which are arranged along the second direction Z. The plurality of battery packs 20 share two end plates 10 , which are respectively located at two ends of the battery pack 20 along the first direction X.

[0073] 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.

[0074] In the embodiment of the present application, a cavity 10a is formed inside 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 plate 101, which reduces the material cost of the end plate 10. The end plate 10 is formed by bending the plate 101, which reduces the difficulty of forming the end plate 10, makes the processing of the end plate 10 more convenient, reduces the manufacturing cost of the end plate 10, and further reduces the manufacturing cost of the battery 100. The end plate 10 can limit the position of the battery cell 201. When the battery cell 201 expands, the end plate 10 can produce elastic deformation under the expansion force of the battery cell 201 to shrink the cavity 10a, thereby absorbing the expansion force of the battery cell 201, and the extrusion force on the battery cell 201 is relatively reduced, reducing the risk of damage to the battery cell 201 due to excessive extrusion force, thereby extending the service life of the battery 100. The end plate 10 can also limit the expansion of the battery cell 201, reduce the expansion amount of the battery cell 201, and thus extend the service life of the battery 100. Therefore, such an end plate 10 can not only restrain the expansion of the battery cell 201, but also absorb the expansion force of the battery cell 201 to extend the service life of the battery 100, and can also reduce the manufacturing cost of the battery 100.

[0075] In some embodiments, please refer to Figure 3 and Figure 4 The end plate 10 includes a first wall portion 1, a second wall portion 2 and a support portion 3. The first wall portion 1 and the second wall portion 2 are arranged opposite to each other along a first direction X, and the cavity 10a is located between the first wall portion 1 and the second wall portion 2. The support portion 3 is located in the cavity 10a and supports the first wall portion 1 and the second wall portion 2 along the first direction X.

[0076] The first wall portion 1, the support portion 3 and the second wall portion 2 may be connected in sequence so that the plate 101 is bent to form the end plate 10; or the first wall portion 1 and the second wall portion 2 may be connected via a first transition piece, the second wall portion 2 and the support portion 3 may be connected via a second transition piece, and the first wall portion 1, the first transition piece, the second wall portion 2, the second transition piece and the support portion 3 may be connected in sequence so that the plate 101 is bent to form the end plate 10.

[0077] The battery cells 201 may be arranged along the first direction X, the end plate 10 may be disposed on both sides of the battery cells 201 along the first direction X, and the first wall 1 or the second wall 2 of the end plate 10 may contact the battery cells 201; or the battery cells 201 may be arranged along the second direction Z, the end plate 10 may be disposed on both sides of the battery cells 201 along the second direction Z, and the first wall 1 and the second wall 2 of the end plate 10 may contact the battery cells 201. The first direction X is perpendicular to the second direction Z.

[0078] The first wall 1 and the second wall 2 may both have abutting surfaces, and the abutting surfaces of the first wall 1 and the second wall 2 may both abut against the battery cell 201 to limit the position of the battery cell 201. Alternatively, one of the first wall 1 and the second wall 2 may have abutting surfaces for abutting against the battery cell 201, and the other may be provided with a groove portion penetrating the end plate 10 along the third direction Y, and the groove portion is used to accommodate the binding member 40, and the binding member 40 is used to bind the battery cell 201 and the end plate 10 to reduce the expansion of the battery cell 201. The first direction X is perpendicular to the third direction Y.

[0079] The support portion 3 can divide the cavity 10a into a plurality of sections 10b, and the plurality of sections 10b are arranged along the second direction Z.

[0080] The support portion 3 may include one bending segment, which is supported between the first wall portion 1 and the second wall portion 2; or the support portion 3 may include multiple bending segments, which are supported between the first wall portion 1 and the second wall portion 2. When the support portion 3 includes multiple bending segments, each bending segment may be supported between the first wall portion 1 and the second wall portion 2; or some bending segments may be supported between the first wall portion 1 and the second wall portion 2, and the other bending segments may be arranged close to the first wall portion 1 or the second wall portion 2.

[0081] The support portion 3 may directly contact the first wall portion 1 and the second wall portion 2, so that the support portion 3 is supported between the first wall portion 1 and the second wall portion 2. The support portion 3 may also be connected to the first wall portion 1 and the second wall portion 2 through a structural member, so that the support portion 3 is supported between the first wall portion 1 and the second wall portion 2; wherein the structural member may be a structural adhesive.

[0082] The first wall portion 1 and the second wall portion 2 are supported along the first direction X by the support portion 3. When the end plate 10 is subjected to force along the first direction X, the support portion 3 can slow down the deformation of the end plate 10 along the first direction X, enhance the strength of the end plate 10 along the first direction X, and make the structure of the end plate 10 more stable. When the battery cell 201 of the battery pack 20 expands, the support portion 3 of the end plate 10 can offset part of the expansion force, thereby reducing the expansion amount of the battery cell 201 and extending the service life of the battery 100.

[0083] In some embodiments, please refer to Figure 3 and Figure 4 The support portion 3 includes a first bending section 31 , a second bending section 32 and a third bending section 33 . The first bending section 31 abuts against the first wall portion 1 . The second bending section 32 abuts against the second wall portion 2 . The third bending section 33 connects the first bending section 31 and the second bending section 32 .

[0084] The first bending section 31 may contact the first wall portion 1, and the first bending section 31 may move relative to the first wall portion 1, so that the first bending section 31 abuts against the first wall portion 1. The first bending section 31 may also be fixedly connected to the first wall portion 1, so that the first bending section 31 abuts against the first wall portion 1; for example, the first bending section 31 and the first wall portion 1 are bonded; for another example, the first bending section 31 and the first wall portion 1 are welded.

[0085] The second bending section 32 may contact the second wall portion 2, and the second bending section 32 may move relative to the second wall portion 2, so that the second bending section 32 abuts against the second wall portion 2. The second bending section 32 may also be fixedly connected to the second wall portion 2, so that the second bending section 32 abuts against the second wall portion 2; for example, the second bending section 32 and the second wall portion 2 are bonded; for another example, the second bending section 32 and the second wall portion 2 are welded.

[0086] The number of the third bending segments 33 may be one, and one third bending segment 33 connects one first bending segment 31 and one second bending segment 32, so that the third bending segment 33 is supported between the first wall portion 1 and the second wall portion 2; the number of the third bending segments 33 may be multiple, and two adjacent third bending segments 33 connect one first bending segment 31 or one second bending segment 32, so that multiple third bending segments 33 are supported between the first wall portion 1 and the second wall portion 2. Only the third bending segment 33 may be supported between the first wall portion 1 and the second wall portion 2, or other bending segments and the third bending segment 33 may be supported between the first wall portion 1 and the second wall portion 2.

[0087] The third bending section 33 connects the first bending section 31 abutting against the first wall portion 1 and the second bending section 32 abutting against the second wall portion 2, and the third bending section 33 can support the first wall portion 1 and the second wall portion 2, thereby improving the structural strength of the end plate 10. The third bending section 33 connects the first bending section 31 and the second bending section 32, thereby facilitating the bending forming of the support portion 3, and the first bending section 31 and the second bending section 32 can improve the structural stability of the third bending section 33, thereby reducing the risk of the third bending section 33 deviating from supporting the first wall portion 1 and the second wall portion 2, thereby improving the limiting effect of the end plate 10 on the expansion of the battery cell 201.

[0088] In some embodiments, there are multiple third bending segments 33, and the multiple third bending segments 33 are arranged at intervals along the second direction Z. Along the second direction Z, the first bending segments 31 and the second bending segments 32 are alternately arranged, and the first direction X intersects with the second direction Z.

[0089] As an example, Figure 4 As shown, there are three third bending segments 33, which are spaced apart along the second direction Z. The three third bending segments 33 divide the cavity 10a into four sections 10b, and each of the third bending segments 33 is connected at both ends to the first bending segment 31 and the second bending segment 32 respectively.

[0090] By setting a plurality of third bending sections 33, the plurality of third bending sections 33 can support the first wall portion 1 and the second wall portion 2, thereby enhancing the structural strength of the first wall portion 1 and the second wall portion 2; the third bending sections 33 are arranged at intervals along the second direction Z, and the third bending sections 33 can separate the cavity 10a into a plurality of intervals 10b along the second direction Z, thereby improving the deformation resistance of the cavity 10a.

[0091] In some embodiments, the support portion 3 also includes a fourth bending segment 34 having a first end 341 and a second end 342 relative to each other, the second end 342 is connected to a second bending segment 32 , the first end 341 is fixed to the first wall portion 1 , and the first end 341 is one end of the plate 101 .

[0092] The first end 341 is fixedly connected to the first wall portion 1, and the fixed connection may be riveting, welding, etc. The fourth bending segment 34 may be arranged in parallel with the third bending segment 33, or the extension direction of the fourth bending segment 34 may intersect with the first direction X. In the embodiment in which other bending segments and the third bending segment 33 are supported together between the first wall portion 1 and the second wall portion 2, the other bending segment may be the fourth bending segment 34.

[0093] The third bending section 33 and the fourth bending section 34 can both divide the cavity 10a into a plurality of sections 10b. Figure 3 and Figure 4 As shown, there are three third bending segments 33 and one fourth bending segment 34 , and the three third bending segments 33 and one fourth bending segment 34 together divide the cavity 10 a into five sections 10 b .

[0094] By connecting the second end 342 of the fourth bending segment 34 to the second bending segment 32 and fixing the first end 341 of the fourth bending segment 34 to the first wall portion 1, the fourth bending segment 34 can be supported between the second wall portion 2 and the first wall portion 1, thereby enhancing the strength of the end plate 10. By fixing the first end 341, which is one end of the plate 101, to the first wall portion 1, the structure of the end plate 10 can be stabilized, and the stability of the fourth bending segment 34 can be enhanced by fixing the position of the first end 341, so as to stabilize the positions of the first bending segment 31, the second bending segment 32 and the third bending segment 33, thereby improving the stability of the support portion 3.

[0095] In some embodiments, the fourth bending section 34 is welded to the first wall portion 1. By welding the fourth bending section 34 to the first wall portion 1, the connection strength between the fourth bending section 34 and the first wall portion 1 can be improved, and the risk of the fourth bending section 34 falling off the first wall portion 1 can be reduced.

[0096] In some embodiments, the first bending section 31 is connected to the first wall portion 1 by welding, and / or the second bending section 32 is connected to the second wall portion 2 by welding.

[0097] It is possible that only the first bending section 31 is welded to the first wall portion 1; it is also possible that only the second bending section 32 is welded to the second wall portion 2; it is also possible that the first bending section 31 and the second bending section 32 are welded to the first wall portion 1 and the second wall portion 2 respectively.

[0098] As an example, Figure 4 As shown, there are two first bending sections 31, both of which are welded to the first wall portion 1, there are two second bending sections 32, both of which are welded to the second wall portion 2, and the support portion 3 has a first end 341 as the end portion of the plate 101, and the first end 341 is welded to the first wall portion 1.

[0099] By welding the first bending section 31 to the first wall portion 1, the connection strength between the first bending section 31 and the first wall portion 1 can be improved, and the structural stability of the first bending section 31 can be improved. By welding the second bending section 32 to the second wall portion 2, the connection strength between the second bending section 32 and the second wall portion 2 can be improved, and the structural stability of the second bending section 32 can be improved. The first bending section 31 and the second bending section 32 are respectively welded to the first wall portion 1 and the second wall portion 2, which can improve the structural stability of the third bending section 33, thereby making the third bending section 33 support the first wall portion 1 and the second wall portion 2 more stably, improving the structural strength of the end plate 10, and reducing the risk of the end plate 10 being damaged by force along the first direction X.

[0100] In some embodiments, the support portion 3 has a first end 341 , the first end 341 is one end of the plate 101 , and the first end 341 is fixed to the first wall portion 1 .

[0101] Only one end of the plate 101 may be the end of the support portion 3, and the end is the first end 341. Alternatively, both ends of the plate 101 are ends of the support portion 3, and the plate 101 is formed by bending a part of the support portion 3, the first wall portion 1, the second wall portion 2, and another part of the support portion 3 in sequence to form the end plate 10; wherein one end of the support portion 3 is the first end 341, and the first end 341 is fixed to the first wall portion 1.

[0102] The first end 341 may be detachably connected to the first wall portion 1 to fix the first end 341 and the first wall portion 1; for example, the first end 341 and the first wall portion 1 are bolted together. Alternatively, the first end 341 and the first wall portion 1 may be welded to fix the first end 341 and the first wall portion 1.

[0103] By using the first end 341 of the support portion 3 as one end of the plate 101, the support portion 3 is located between the first wall portion 1 and the second wall portion 2, so that one end of the plate 101 is fixed between the first wall portion 1 and the second wall portion 2, reducing the risk of the end of the plate 101 being exposed to the outside of the end plate 10 and being damaged or falling off.

[0104] In some embodiments, along the first direction X, a first groove 11 is formed on a side of the first wall portion 1 facing the second wall portion 2 , and the first end 341 is inserted into the first groove 11 .

[0105] The fourth bending section 34 may fill the first groove 11, and the first groove 11 may limit the fourth bending section 34 from moving away from the first wall portion 1 along the first direction X and limit the fourth bending section 34 from moving along the second direction Z; or the fourth bending section 34 may fill only a portion of the first groove 11, and the first groove 11 may limit the fourth bending section 34 from moving along the second direction Z. The first end 341 is fixed in the first groove 11 to strengthen the connection between the first end 341 and the first wall portion 1.

[0106] By inserting the first end 341 into the first groove 11 , the first end 341 can be confined in the first groove 11 , reducing the risk of the first end 341 being disconnected from the first wall portion 1 , making the structure of the end plate 10 more stable.

[0107] In some embodiments, the first wall portion 1 partially protrudes in a direction away from the second wall portion 2 to form a first protrusion 12 at a position corresponding to the first groove 11 .

[0108] As an example, Figure 4 As shown, the first wall portion 1 is bent to protrude in a direction away from the second wall portion 2 to form a first groove 11 and a first protrusion 12 .

[0109] The first groove 11 is formed by bending to form a corresponding first protrusion 12 , and the first protrusion 12 can be connected to external components to achieve the installation of the end plate 10 . The first groove 11 can be inserted with the first end 341 to facilitate the fixation of the first end 341 and improve the structural stability of the support part 3 .

[0110] In some embodiments, the end plate 10 also includes a third wall portion 4 and a fourth wall portion 5, the third wall portion 4 and the fourth wall portion 5 are arranged opposite to each other along the second direction Z, the cavity 10a is located between the third wall portion 4 and the fourth wall portion 5, the third wall portion 4 connects the first wall portion 1 and the second wall portion 2, the fourth wall portion 5 connects the second wall portion 2 and the support portion 3, and the first direction X intersects with the second direction Z.

[0111] As an example, Figure 4 As shown, the plate 101 has a third end 1011 and a fourth end 1012, the third end 1011 is one end of the first wall portion 1, and the fourth end 1012 is the first end 341 of the support portion 3. The first wall portion 1, the third wall portion 4, the second wall portion 2, the fourth wall portion 5 and the support portion 3 are sequentially connected to bend and form the end plate 10. In the embodiment where the end plate 10 includes a first transition piece and a second transition piece, the first transition piece may be the third wall portion 4, and the second transition piece may be the fourth wall portion 5.

[0112] By connecting the first wall portion 1 and the second wall portion 2 through the third wall portion 4, and connecting the second wall portion 2 and the support portion 3 through the fourth wall portion 5, the plate 101 can be bent and formed into the end plate 10, which is convenient for processing the end plate 10. The third wall portion 4 connects the first wall portion 1 and the second wall portion 2 to improve the structural strength between the first wall portion 1 and the second wall portion 2, and reduce the risk of compression damage between the first wall portion 1 and the second wall portion 2. The fourth wall portion 5 connects the second wall portion 2 and the support portion 3 to improve the structural strength between the second wall portion 2 and the support portion 3, and reduce the risk of compression damage between the second wall portion 2 and the support portion 3.

[0113] In some embodiments, please refer to Figure 5 , Figure 5 The first wall portion 1 partially protrudes in the direction facing the second wall portion 2 to form a second protrusion 13, so as to form a second groove 14 at a position corresponding to the second protrusion 13 on the side of the first wall portion 1 away from the second wall portion 2. The second groove 14 passes through both ends of the first wall portion 1 along the third direction Y, and the third direction Y intersects with the first direction X. The battery 100 also includes a binding member 40 ( Figure 5 (not shown), the binding member 40 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 second groove 14.

[0114] There may be one second groove 14; one second groove 14 may accommodate a part of one binding piece 40, or one second groove 14 may accommodate parts of multiple binding pieces 40. There may also be multiple second grooves 14, multiple second grooves 14 are arranged at intervals along the second direction Z, one second groove 14 accommodates one binding piece 40, and the second protrusions 13 correspond to the second grooves 14 one by one.

[0115] The binding member 40 is used to bind the end plate 10 and the battery pack 20 to restrain the expansion of the battery cells 201 in the battery pack 20. For example, the battery pack 20 is provided with end plates 10 on both sides along the first direction X, and the two end plates 10 are provided with second grooves 14 on the sides away from the battery pack 20. The binding member 40 binds the battery pack 20 and the two end plates 10 around the axis extending in the second direction Z, and the two parts of the binding member 40 are respectively embedded in the two second grooves 14 to improve the binding effect of the binding member 40 and reduce the risk of the binding member 40 falling off. Among them, when the binding member 40 binds the battery pack 20 and the end plate 10, the battery pack 20 is subjected to the binding force of the binding member 40 along the first direction X, and the expansion of the battery cells 201 of the battery pack 20 along the first direction X is reduced.

[0116] In the embodiment where the end plate 10 is provided with a groove portion, the groove portion may be a second groove 14 .

[0117] By providing the second protrusion 13 to form a second groove 14 at a position corresponding to the second protrusion 13, the second groove 14 can accommodate the binding piece 40 to stabilize the position of the binding piece 40 and reduce the risk of the binding piece 40 falling off the end plate 10, thereby stabilizing the binding effect of the binding piece 40 on the battery pack 20 and the end plate 10. When the battery cell 201 expands, the battery cell 201 squeezes the end plate 10, and the binding piece 40 can bind the end plate 10 to reduce the expansion amount of the battery cell 201, thereby extending the service life of the battery 100. Part of the binding piece 40 is accommodated in the second groove 14 and the second groove 14 runs through both ends of the first wall portion 1, which can also increase the contact area between the binding piece 40 and the end plate 10, and improve the stability of the binding piece 40 binding the end plate 10.

[0118] In some embodiments, the first wall portion 1 is formed with a plurality of second grooves 14 , and the plurality of second grooves 14 are arranged at intervals along the second direction Z. The first direction X, the second direction Z, and the third direction Y are not coplanar and intersect with each other.

[0119] As an example, Figure 5 As shown, there are two second grooves 14, which are spaced apart along the second direction Z and penetrate the first wall portion 1 along the third direction Y. The first direction X, the second direction Z and the third direction Y are perpendicular to each other.

[0120] In the above embodiment, the plurality of second grooves 14 are conducive to arranging the plurality of binding members 40 on the end plate 10 , thereby stabilizing the positions of the plurality of binding members 40 and reducing the risk of the plurality of binding members 40 falling off the end plate 10 .

[0121] In some embodiments, the support portion 3 is formed with a third groove 35 , and the second protrusion 13 is at least partially accommodated in the third groove 35 .

[0122] The plate 101 may have a notch, and when the plate 101 is bent to form the support portion 3, the notch forms a third groove 35 on the support portion 3. The support portion 3 may also be bent to form the third groove 35; wherein the third groove may be formed by bending at least three bending sections.

[0123] The second convex portion 13 may be completely accommodated in the third groove 35, or only a part of the second convex portion 13 may be accommodated in the third groove 35. When there are multiple second convex portions 13, one second convex portion 13 may be accommodated in one third groove 35, or multiple second convex portions 13 may be accommodated in the same third groove 35.

[0124] By accommodating at least part of the second protrusion 13 in the third groove 35, the third groove 35 can limit the movement of the second protrusion 13, so that the positions of the second groove 14 and the third groove 35 are relatively stable, thereby improving the structural strength of the support portion 3 and the first wall portion 1 and improving the structural stability of the end plate 10.

[0125] In some embodiments, the support portion 3 includes a plurality of continuously arranged bending segments, and the third groove 35 is defined by three adjacent bending segments.

[0126] The multiple bending sections may form only one third groove 35 or may form multiple third grooves 35 .

[0127] The third groove 35 is defined by three adjacent bending sections. The multiple bending sections improve the structural stability of the support portion 3. The second protrusion 13 is at least partially accommodated in the third groove 35, thereby improving the structural strength of the support portion 3 and the first wall portion 1.

[0128] In some embodiments, the plurality of bending segments include at least one second bending segment 32 , the second bending segment 32 abuts against the second wall portion 2 , and the second protrusion 13 and the second bending segment 32 are disposed along the first direction X opposite to each other.

[0129] The first bending section 31 , the second bending section 32 and the third bending section 33 may jointly define the third groove 35 ; or the third bending section 33 , the second bending section 32 and the fourth bending section 34 may jointly define the third groove 35 .

[0130] In the above embodiment, the second bending section 32 is connected to the second wall portion 2, so that the third groove 35 is connected to the second wall portion 2, and the second protrusion 13 is at least partially accommodated in the third groove 35, so that the position of the second protrusion 13 is more stable, thereby improving the structural strength of the second protrusion 13.

[0131] In some embodiments, the cavity 10 a passes through opposite ends of the end plate 10 .

[0132] The folds 10c of the plate 101 may all extend in the same direction to achieve the bending forming of the end plate 10. The direction may be any direction perpendicular to the plane where the first direction X is located.

[0133] As an example, Figure 5 As shown, the folds 10 c of the plate 101 all extend along the third direction Y, so that when the plate 101 is bent into the end plate 10 , a cavity 10 a penetrating through both ends of the end plate 10 along the third direction Y is formed.

[0134] The cavity 10 a runs through two opposite ends of the end plate 10 , so that the folds 10 c of the end plate 10 can extend in the same direction, thereby reducing the difficulty of forming the end plate 10 and saving the material usage of the end plate 10 .

[0135] In some embodiments, the cavity 10a penetrates opposite ends of the end plate 10 along the third direction Y. The outer surface of the end plate 10 is provided with a second groove 14, and the second groove 14 penetrates both ends of the end plate 10 along the third direction Y, and the third direction Y intersects with the first direction X. The battery 100 further 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 second groove 14.

[0136] The second groove 14 may be a recessed portion on the plate 101, and after the plate is bent and formed, the recessed portion forms the second groove 14 on the outer surface of the end plate 10. The second groove 14 may also be formed by bending the plate 101, and the end plate 10 forms a protrusion at a position opposite to the second groove 14. In the embodiment where the first wall portion 1 is formed with the second protrusion 13, the protrusion may be the second protrusion 13.

[0137] By providing the second groove 14 that passes through both ends of the end plate 10 along the third direction Y, part of the binding piece 40 can be accommodated in the second groove 14, thereby increasing the contact area between the binding piece 40 and the end plate 10, improving the stability of the binding piece 40 binding the end plate 10, and reducing the risk of the binding piece 40 detaching from the end plate 10. When the battery cell 201 expands, the battery cell 201 presses the end plate 10, and the binding piece 40 can restrain the end plate 10 to reduce the expansion of the battery cell 201, thereby extending the service life of the battery 100.

[0138] In some embodiments, please refer to Figure 6 , Figure 6 An exploded view of a battery 100 provided for some other 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 second direction Z, a plurality of battery cells 201 are arranged between the first cover 50 and the support member 60 along the second direction Z, an end plate 10 connects the first cover 50 and the support member 60, and the second direction Z intersects with the first direction X. The end plate 10 includes a first wall portion 1 and a second wall portion 2, the first wall portion 1 and the second wall portion 2 are arranged opposite to each other along the first direction X, and a cavity 10a is located between the first wall portion 1 and the second wall portion 2. The second wall portion 2 is closer to the battery cell 201 than the first wall portion 1, and the first wall portion 1 is connected to the first cover 50.

[0139] As an example, Figure 6 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.

[0140] The second wall 2 may be against the battery cell 201, or the second wall 2 may be spaced apart from the battery cell 201. The first wall 1 may be directly connected to the first cover 50, or the first wall 1 may be indirectly connected to the first cover 50.

[0141] By arranging the battery pack 20 between the first cover 50 and the support 60, 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. The end plate 10 connects the first cover 50 and the support 60. The first cover 50 and the support 60 can limit the position of the end plate 10. When the battery cell 201 expands and squeezes the end plate 10, the restraining effect of the end plate 10 on the battery cell 201 is improved. By arranging the second wall portion 2 closer to the battery cell 201 than the first wall portion 1, the second wall portion 2 can contact the battery cell 201 to alleviate the expansion of the battery cell 201. The end plate 10 can be connected to the first cover 50 through the first wall portion 1, and the position of the end plate 10 is limited by the first cover 50 to limit the expansion of the battery cell 201.

[0142] In some embodiments, along the first direction X, the first wall portion 1 partially protrudes in a direction away from the second wall portion 2 to form a first protrusion 12 , and the first protrusion 12 is connected to the first cover body 50 .

[0143] The first protrusion 12 and the first cover body 50 may be fixedly connected, for example, by bonding, riveting, welding, etc. The first protrusion 12 and the first cover body 50 may also be detachably connected, for example, by bolting.

[0144] As an example, the first protrusion 12 is provided with a first mounting hole 121 , and the first cover body 50 is provided with a threaded hole. A bolt passes through the first mounting hole 121 and cooperates with the threaded hole to achieve a detachable connection between the first protrusion 12 and the first cover body 50 .

[0145] The first cover 50 is connected by the first protrusion 12 to achieve installation of the end plate 10 and the first cover 50 . The first protrusion 12 protrudes in a direction away from the second wall 2 , which helps to alleviate the expansion of the battery cell 201 and improve the performance of the battery 100 .

[0146] In some embodiments, please refer to Figure 7 , Figure 7 A schematic diagram of the structure of a battery cell 201, a first cover 50, a support plate, an end plate 10, and a mounting beam 70 provided in some embodiments of the present application. Along the second direction Z, a mounting beam 70 is provided on the side of the first cover 50 facing the support member 60. Along the first direction X, a portion of the end plate 10 is located between the battery cell 201 and the mounting beam 70. Among them, the first protrusion 12 abuts against the side of the mounting beam 70 facing the support member 60 and is mounted on the mounting beam 70.

[0147] The mounting beam 70 may be a solid structure or a hollow structure. Along the first direction X, a portion of the end plate 10 is located between the battery cell 201 and the mounting beam 70. When the battery cell 201 expands along the first direction X, the end plate 10 located between the battery cell 201 and the mounting beam 70 may abut against the mounting beam 70, thereby alleviating the expansion of the battery cell 201 along the first direction X.

[0148] By arranging a portion of the end plate 10 between the battery cell 201 and the mounting beam 70, the mounting beam 70 can limit the movement of the end plate 10, thereby alleviating the expansion of the battery cell 201. The first protrusion 12 is mounted on the mounting beam 70, thereby fixing the position of the end plate 10, making the installation of the end plate 10 more stable.

[0149] In some embodiments, the mounting beam 70 includes a first connection portion 701, a second connection portion 702, and a third connection portion 703 connected in sequence. The first connection portion 701 and the third connection portion 703 are arranged at intervals along the first direction X, and the first connection portion 701 and the third connection portion 703 are both connected to the first cover 50. The second connection portion 702 and the first cover 50 are arranged opposite to each other along the second direction Z. A portion of the end plate 10 is located between the battery cell 201 and the third connection portion 703, and the first protrusion is connected to the side of the second connection portion 702 facing the support member 60.

[0150] The mounting beam 70 can be formed by bending a sheet metal member in one piece.

[0151] As an example, Figure 7 As shown, the mounting beam 70 is mounted on the side of the first cover body 50 facing the second cover body 30, and the first connecting portion 701, the second connecting portion 702, the third connecting portion 703 and the first cover body 50 form a hollow cavity 704. The first convex portion 12 is provided with a first mounting hole 121, and the second connecting portion 702 is provided with a second mounting hole 705. The first rivet 6 passes through the first mounting hole 121 and the second mounting hole 705 to lock the second connecting portion 702 and the first convex portion 12, and a part of the first rivet 6 is located in the hollow cavity 704. The first wall portion 1 has a transition section connected to the third wall portion 4, and the transition section 15 is arranged facing the third connecting portion 703 and is located between the third connecting portion 703 and the battery cell 201. When the battery cell 201 expands to squeeze the end plate 10, the third connecting portion 703 cooperates with the transition section 15 to restrain the expansion of the battery cell 201. The support member 60 is riveted to the fourth wall portion 5 of the end plate 10 by a second rivet 7 , and a portion of the second rivet 7 is located in the cavity 10 a .

[0152] By arranging the first connection part 701 and the third connection part 703 at intervals along the first direction X and the second connection part 702 and the first cover body 50 oppositely along the second direction Z, the mounting beam 70 and the first cover body 50 can form a hollow cavity 704, and the mounting beam 70 can offset the mounting stress inside the battery 100 and reduce the risk of damage to the battery 100. A portion of the end plate 10 is located between the battery cell 201 and the third connection part 703, and the third connection part 703 can support the end plate 10 and enhance the restraining effect of the end plate 10 on the battery cell 201.

[0153] In some embodiments, along the third direction Y, the size of the mounting beam 70 is smaller than or equal to the size of the end plate 10 , and the first direction X, the second direction Z and the third direction Y are perpendicular to each other.

[0154] Along the third direction Y, the size of the mounting beam 70 may be equal to the size of the end plate 10, or may be smaller than the size of the end plate 10. The size of the end plate 10 may be the minimum size of the end plate 10 along the third direction Y, and the size of the mounting beam 70 may be the maximum size of the mounting beam 70 along the third direction Y. The overlapping portion of the projection of the mounting beam 70 along the first direction X and the projection of the battery pack 20 along the first direction X may be located within the overlapping portion of the projection of the end plate 10 along the first direction X and the projection of the battery pack 20 along the first direction X.

[0155] When the size of the mounting beam 70 is smaller than or equal to the size of the end plate 10 , the end plate 10 separates the mounting beam 70 from the battery cell 201 , reducing the risk of the mounting beam 70 contacting the battery cell 201 and affecting the insulation performance of the battery cell 201 .

[0156] 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.

[0157] Please continue to refer to Figure 6 and Figure 7 , an embodiment of the present application provides a battery 100, including an end plate 10 and a battery pack 20. A cavity 10a is formed inside the end plate 10. The end plate 10 is formed by integrally bending a plate 101, and the plate 101 encloses the cavity 10a. 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. The end plate 10 includes a first wall portion 1, a third wall portion 4, a second wall portion 2, a fourth wall portion 5 and a support portion 3 connected in sequence, the first wall portion 1 and the second wall portion 2 are arranged opposite to each other along the first direction X, the first wall portion 1 is used to connect to the mounting beam 70 of the battery 100, and the second wall portion 2 is used to abut against the battery pack 20 along the first direction X. The support portion 3 has a first bending section 31, a second bending section 32, a third bending section 33 and a fourth bending section 34. The third bending section 33 connects the first bending section 31 and the second bending section 32. The third bending section 33 is supported between the first wall portion 1 and the second wall portion 2. The fourth bending section 34 is one end of the plate 101 and is connected to the first wall portion 1. The first wall portion 1 is provided with a second groove 14 for accommodating the binding member 40. The second groove 14 passes through the first wall portion 1 along the third direction Y.

[0158] The end plate 10 is formed by bending a plate 101, which reduces the difficulty of forming the end plate 10. The cavity 10a is formed by bending. The cavity 10a can absorb external vibration and impact while meeting the mechanical strength of the end plate 10, thereby reducing the risk of damage to the internal structure of the battery 100. The cavity 10a can also reduce the consumables of the end plate 10, save the manufacturing cost of the end plate 10, and thus save the manufacturing cost of the battery 100. When the battery cell 201 expands, the end plate 10 can compress the space of the cavity 10a under the action of the expansion force of the battery cell 201, thereby absorbing the expansion force of the battery cell 201 and reducing the risk of damage between the battery cells 201 due to excessive squeezing force. The support portion 3 is supported between the first wall portion 1 and the second wall portion 2, and the support portion 3 can enhance the strength of the first wall portion 1 supporting the battery cell 201, thereby reducing the risk of damage to the end plate 10. Such a battery 100 not only achieves a balance between limiting the expansion of the battery cell 201 and extending the service life of the battery 100 , but also improves the performance of the battery 100 and reduces the manufacturing cost of the battery 100 .

[0159] 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.

[0160] 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: an end plate, wherein a cavity is formed inside the end plate; The end plate is formed by integrally bending a plate, and the plate encloses the cavity; The battery pack includes a plurality of battery cells arranged along a first direction. The end plate is disposed on at least one side of the battery pack along the first direction.

2. The battery according to claim 1, characterized in that The end plate comprises: A first wall portion and a second wall portion are arranged opposite to each other along the first direction, and the cavity is located between the first wall portion and the second wall portion; The support portion is located in the cavity and supports the first wall portion and the second wall portion along the first direction.

3. The battery according to claim 2, characterized in that The support portion comprises: A first bending section abuts against the first wall portion; A second bent section abuts against the second wall portion; The third bending segment connects the first bending segment and the second bending segment.

4. The battery according to claim 3, characterized in that There are multiple third bending segments, and the multiple third bending segments are arranged at intervals along the second direction; along the second direction, the first bending segments and the second bending segments are alternately arranged, and the first direction intersects with the second direction.

5. The battery according to claim 3, characterized in that The support portion further includes a fourth bending segment having a first end and a second end opposite to each other, the second end being connected to one of the second bending segments, the first end being fixed to the first wall portion, and the first end being one end of the plate.

6. The battery according to claim 5, characterized in that The fourth bending section is connected to the first wall portion by welding.

7. The battery according to claim 3, characterized in that The first bending section is connected to the first wall portion by welding; and / or the second bending section is connected to the second wall portion by welding.

8. The battery according to claim 2, characterized in that The supporting portion has a first end, the first end is one end of the plate, and the first end is fixed to the first wall portion.

9. The battery according to claim 8, characterized in that A first groove is formed on a side of the first wall portion facing the second wall portion along the first direction, and the first end is inserted into the first groove.

10. The battery according to claim 9, characterized in that The first wall portion partially protrudes in a direction away from the second wall portion to form a first convex portion at a position corresponding to the first groove.

11. The battery according to claim 2, characterized in that The end plate also includes a third wall portion and a fourth wall portion, the third wall portion and the fourth wall portion are arranged opposite to each other along the second direction, the cavity is located between the third wall portion and the fourth wall portion, the third wall portion connects the first wall portion and the second wall portion, the fourth wall portion connects the second wall portion and the support portion, and the first direction intersects with the second direction.

12. The battery according to claim 2, characterized in that The first wall portion partially protrudes in a direction facing the second wall portion to form a second convex portion, so as to form a second groove at a position corresponding to the second convex portion on a side of the first wall portion away from the second wall portion, and the second groove passes through two ends of the first wall portion along a third direction, and the third direction intersects with 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 second groove.

13. The battery according to claim 12, characterized in that The first wall portion is formed with a plurality of the second grooves, and the plurality of the second grooves are arranged at intervals along the second direction. The first direction, the second direction and the third direction are not coplanar and intersect with each other.

14. The battery according to claim 12, characterized in that The support portion is formed with a third groove, and the second protrusion is at least partially accommodated in the third groove.

15. The battery according to claim 14, characterized in that The support portion includes a plurality of continuously arranged bending segments, and the third groove is defined by three adjacent bending segments.

16. The battery according to claim 15, characterized in that The plurality of bending segments include at least one second bending segment, the second bending segment abuts against the second wall portion, and the second protrusion and the second bending segment are arranged opposite to each other along the first direction.

17. The battery according to any one of claims 1 to 16, characterized in that: The cavity extends through opposite ends of the end plate.

18. The battery according to claim 17, characterized in that The cavity passes through two opposite ends of the end plate along the third direction; The outer surface of the end plate is provided with a second groove, and the second groove passes through both ends of the end plate along the third direction, and the third direction intersects with 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 second groove.

19. The battery according to any one of claims 1 to 16, characterized in that: The battery further comprises a first cover and a support member, the first cover and the support member are arranged opposite to each other along a second direction; along the second direction, the battery pack is arranged between the first cover and the support member, the support member supports the battery pack, the end plate connects the first cover and the support member, and the second direction intersects with the first direction; The end plate includes a first wall portion and a second wall portion. The first wall portion and the second wall portion are arranged opposite to each other along the first direction, and the cavity is located between the first wall portion and the second wall portion. The second wall portion is closer to the battery cell than the first wall portion, and the first wall portion is connected to the first cover body.

20. The battery according to claim 19, characterized in that Along the first direction, the first wall portion partially protrudes in a direction away from the second wall portion to form a first convex portion, and the first convex portion is connected to the first cover body.

21. The battery according to claim 20, characterized in that Along the second direction, a mounting beam is provided on one side of the first cover body facing the support member; Along the first direction, a portion of the end plate is located between the battery cell and the mounting beam; Wherein, the first protrusion abuts against a side of the mounting beam facing the support member and is mounted on the mounting beam.

22. The battery according to claim 21, characterized in that The mounting beam includes a first connection portion, a second connection portion and a third connection portion connected in sequence, the first connection portion and the third connection portion are spaced apart along the first direction, and the first connection portion and the third connection portion are both connected to the first cover body, the second connection portion and the first cover body are arranged opposite to each other along the second direction, a portion of the end plate is located between the battery cell and the third connection portion, and the first protrusion is connected to a side of the second connection portion facing the support member.

23. The battery according to claim 21, characterized in that Along the third direction, the size of the mounting beam is smaller than or equal to the size of the end plate, and the first direction, the second direction and the third direction are perpendicular to each other.

24. An electrical equipment, characterized in that: Comprising a battery as described in any one of claims 1-23.

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