Battery module, battery and electric device

Abstract

The utility model provides a battery module, a battery and an electric device. The battery module comprises a plurality of single batteries, two side plates and two end plates, the single batteries are arranged in the first direction, the two side plates are arranged on the two sides of the single batteries in the second direction respectively, the second direction intersects with the first direction, and through holes are formed in the side plates. The two end plates are respectively arranged at two ends of the plurality of single batteries along the first direction, each end plate comprises a plate main body and a connecting piece, and the connecting pieces protrude out of the surface of the plate main body, penetrate through the through holes and fix the side plates. According to the invention, the assembly yield and efficiency of the battery module can be effectively improved, and the assembly cost is reduced.

Description

Technical Field

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

[0002] With the development of new energy technology, batteries are used more and more widely, for example, 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 battery production process, it is usually necessary to assemble battery cells, end plates, side plates and other components into battery modules, and then assemble the battery modules with other related modules into batteries. The assembly yield and efficiency of battery modules and the assembly cost have an important impact on the economic benefits of batteries. Therefore, how to effectively improve the assembly yield and efficiency of battery modules and reduce the assembly cost is an urgent problem to be solved in battery technology. Utility Model Content

[0004] In view of the above problems, the present application provides a battery module, a battery and an electrical device, which can effectively improve the assembly yield and efficiency of the battery module and reduce the assembly cost.

[0005] In the first aspect, the embodiment of the present application provides a battery module, the battery module includes a plurality of battery cells, two side plates and two end plates, the plurality of battery cells are arranged along a first direction, the two side plates are respectively arranged on both sides of the plurality of battery cells along a second direction, the second direction intersects with the first direction, and a through hole is opened on the side plate. The two end plates are respectively arranged at both ends of the plurality of battery cells along the first direction, the end plate includes a plate body and a connector, the connector protrudes from the surface of the plate body, passes through the through hole and fixes the side plate.

[0006] The connector of the above technical solution can pass through the through hole on the side plate and reliably fix the side plate and the end plate. The operation is simple, which is conducive to simplifying the assembly steps between the end plate and the side plate, so as to reduce the defect rate and assembly time, thereby improving the assembly yield and efficiency of the battery module as a whole. At the same time, it can also reduce the need for complex tools or special processes, thereby reducing the overall assembly cost of the battery module.

[0007] In some embodiments of the first aspect, the connecting member includes a rod portion and a fixing portion, the rod portion passes through the through hole and connects the fixing portion and the plate body, and a portion of the side plate is clamped between the fixing portion and the plate body.

[0008] The above technical solution can increase the contact area between the connecting member and the side plate by introducing the fixing part, and the clamping effect of the fixing part and the plate body on the side plate, which can further improve the connection firmness between the end plate and the side plate.

[0009] In some embodiments of the first aspect, the rod portion and the fixing portion are an integrally formed structure, and the fixing portion is configured to be formed by extruding an end portion of the connecting member away from the end plate after the connecting member passes through the through hole.

[0010] The above technical solution can further simplify the assembly steps between the end plate and the side plate to further reduce the defect rate and assembly time, thereby further improving the overall assembly yield and efficiency of the battery module.

[0011] In some embodiments of the first aspect, there are multiple connecting members, and the multiple connecting members are arranged at intervals along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0012] The multiple connectors can further improve the connection firmness between the side plates and the end plates, thereby improving the reliability of the battery module.

[0013] In some embodiments of the first aspect, the side plate includes a first main body and two bent portions, the two bent portions are respectively connected to two ends of the first main body along the first direction, and the through hole is provided in the bent portion. The bent portion includes a first section and a second section, the first section is connected between the second section and the first main body, the first section extends along the first direction and is connected to the wall surface of the plate body in the second direction, and the second section extends along the second direction and is connected to the wall surface of the plate body in the first direction.

[0014] The above technical solution, by introducing the bending portion, can not only make the side panel better adapt to the structural shape of the panel body, thereby improving the versatility and flexibility of the side panel, but also increase the contact area between the side panel and the panel body, thereby improving the overall structural stability of the battery module.

[0015] In some embodiments of the first aspect, the board body includes a second main body and a convex portion, the convex portion protrudes from a side surface of the second main body facing away from the battery cell, and the connector is disposed on the second main body. The first section and the second section are both connected to the second main body, and an end of the second section away from the first section abuts against the convex portion.

[0016] The above technical solution can not only improve the stability between the end plate and the side plate by introducing the convex part, but also make the entire assembly process of the end plate and the side plate more intuitive and simple, thereby further improving the assembly yield and efficiency of the battery module.

[0017] In some embodiments of the first aspect, a side surface of the second section facing away from the second main body is flush with a side surface of the convex portion facing away from the second main body, which is beneficial to improving the flatness of the junction between the end plate and the side plate, thereby improving the product quality of the battery module.

[0018] In some embodiments of the first aspect, at least one of the bent portion and the plate body is provided with an anti-slip layer, and the anti-slip layer is connected between the bent portion and the body.

[0019] The above technical solution provides an anti-skid layer, which can increase the friction between the bent portion and the plate body, thereby further improving the connection firmness between the end plate and the side plate, thereby improving the reliability of the battery module.

[0020] In some embodiments of the first aspect, the side plate further includes a friction member, which is disposed on a side surface of the side plate facing away from the end plate and around a circumferential edge of the through hole.

[0021] The above technical solution can increase the friction between the connecting member and the side plate by providing a friction member, thereby further improving the connection firmness between the end plate and the side plate, thereby improving the reliability of the battery module.

[0022] In some embodiments of the first aspect, a channel is provided on the plate body, the channel extends along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0023] The above technical solution sets a channel on the end plate. On the one hand, the channel can absorb energy and reduce shock, thereby protecting the battery cells and improving the reliability of the battery module; on the other hand, the channel can also reduce the weight of the end plate, which is beneficial to improving the energy density of the battery module.

[0024] In some embodiments of the first aspect, the channel penetrates the plate body along the third direction, which can further reduce the weight of the end plate, thereby further improving the energy density of the battery module.

[0025] In some embodiments of the first aspect, the connecting member and the plate body are an integrally formed structure.

[0026] On the one hand, there is no need to connect the connector to the board body through an additional connection process, which simplifies the manufacturing process. At the same time, compared with connecting the connector to the board body through an additional connection process, the connector with an integrated structure has a higher connection firmness with the board body.

[0027] In a second aspect, the present application provides a battery, which includes the battery module provided by any embodiment of the first aspect.

[0028] In a third aspect, the present application provides an electrical device, comprising a battery provided by any embodiment of the second aspect, and the battery is used to provide electrical energy.

[0029] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[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 an exploded structure of a battery provided in some embodiments of the present application;

[0033] Figure 3 A schematic diagram of the structure of a battery module provided in some embodiments of the present application;

[0034] Figure 4 for Figure 3 A local enlarged structural schematic diagram of A;

[0035] Figure 5 A schematic diagram of an exploded structure of a side plate and an end plate of a battery module provided in some embodiments of the present application;

[0036] Figure 6 for Figure 5 A schematic diagram of the local enlarged structure at B;

[0037] Figure 7 A schematic diagram of an exploded structure of a side plate and an end plate of another battery module provided in some embodiments of the present application;

[0038] Figure 8 for Figure 7 A schematic diagram of the local enlarged structure at C;

[0039] Fig. 9 A schematic diagram of an exploded structure of a side plate and an end plate of another battery module provided in some embodiments of the present application;

[0040] Fig.10 for Fig. 9 A schematic diagram of the local enlarged structure at D;

[0041] Fig.11 A schematic structural diagram of an end plate of another battery module provided in some embodiments of the present application.

[0042] The reference numerals in the specific implementation manner are as follows:

[0043] 1. Vehicle; 2. Battery; 3. Controller; 4. Motor; 5. Box; 5a. First box portion; 5b. Second box portion; 5c. Accommodation space; 6. Battery module; 7. Battery cell;

[0044] 10. Side plate; 11. Through hole; 12. First main body; 13. Bend portion; 131. First section; 132. Second section; 20. End plate; 21. Plate body; 211. Second main body; 212. Protrusion; 22. Connector; 221. Rod; 222. Fixing portion; 23. Channel; 30. Anti-slip layer; 40. Friction member; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0045] 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 and completely 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.

[0046] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field to which this application belongs; 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" and any variations thereof in the specification and claims of this application and the above-mentioned drawings 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] The term "plurality" used in the present application refers to two or more (including two).

[0052] The term "parallel" in this application includes not only the absolutely parallel situation, but also the roughly parallel situation conventionally recognized in engineering; meanwhile, "vertical" includes not only the absolutely vertical situation, but also the roughly vertical situation conventionally recognized in engineering.

[0053] In the present application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell or a magnesium-ion battery cell, etc., and the embodiments of the present application do not limit this. The battery cell may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this.

[0054] The battery mentioned in the embodiments of the present application may include one or more battery cells to provide a single physical module with higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in mixed connection through a busbar component.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0059] With the development of new energy technology, batteries are used more and more widely, for example, 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.

[0060] In the production process of batteries, it is usually necessary to assemble battery cells, end plates, side plates and other components into battery modules, and then assemble the battery modules with other related modules into batteries. The assembly yield and efficiency of the battery modules and the assembly cost have an important impact on the economic benefits of the battery. At present, the end plates and side plates in the battery modules are usually connected and fixed by welding, but the welding method is prone to defects such as burst holes, welding deviation, cold welding or undercutting, which makes the assembly yield and efficiency of the battery modules low. At the same time, the cost of welding equipment is high, thereby increasing the assembly cost of the battery modules.

[0061] Based on the above considerations, the present application designs a battery module, which includes multiple battery cells, two side plates and two end plates. The multiple battery cells are arranged along a first direction, and the two side plates are respectively arranged on both sides of the multiple battery cells along a second direction, the second direction intersects with the first direction, and through holes are opened on the side plates. The two end plates are respectively arranged at both ends of the multiple battery cells along the first direction, and the end plates include a plate body and a connector, which protrudes from the surface of the plate body, passes through the through hole and fixes the side plates.

[0062] The connector in the above technical solution is easy to operate, can quickly pass through the through hole on the side plate and reliably fix the side plate and the end plate, which is conducive to simplifying the assembly steps between the end plate and the side plate, so as to reduce the defect rate and assembly time, thereby improving the overall assembly yield and efficiency of the battery module. At the same time, it can also reduce the need for complex tools or special processes, thereby reducing the overall assembly cost of the battery module.

[0063] The technical solutions described in the embodiments of the present application are applicable to batteries and electrical devices using batteries.

[0064] The electrical device may be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, and the like; the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, and the like; the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the like; the electric tool may include a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and an electric tool for railways, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0065] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the batteries and electrical equipment described above, but can also be applied to all batteries including battery boxes and electrical equipment using batteries. However, for the sake of simplicity, the following embodiments are described using electric vehicles as examples.

[0066] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application.

[0067] Continue to refer Figure 1 The vehicle 1 is provided with a battery 2 inside, and the battery 2 can be provided at the bottom, head, or tail of the vehicle 1. The battery 2 can be used for powering the vehicle 1, for example, the battery 2 can be used as an operating power source for the vehicle 1.

[0068] The vehicle 1 may further include a controller 3 and a motor 4 , wherein the controller 3 is used to control the battery 2 to supply power to the motor 4 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 1 .

[0069] In some embodiments of the present application, the battery 2 can not only serve as an operating power source for the vehicle 1, but also serve as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0070] Figure 2 An exploded schematic diagram of a battery provided for some embodiments of the present application.

[0071] Continue to refer Figure 2 The battery 2 includes a battery case 5 and a battery cell, and the battery cell is accommodated in the battery case 5.

[0072] The battery case 5 is used to accommodate battery cells, and the battery case 5 can be of various structures. In some embodiments, the battery case 5 can include a first case portion 5a and a second case portion 5b, the first case portion 5a and the second case portion 5b cover each other, and the first case portion 5a and the second case portion 5b jointly define a storage space 5c for accommodating battery cells. The second case portion 5b can be a hollow structure with one end open, the first case portion 5a is a plate-like structure, and the first case portion 5a covers the open side of the second case portion 5b to form a battery case 5 with a storage space 5c; the first case portion 5a and the second case portion 5b can also be hollow structures with one side open, and the open side of the first case portion 5a covers the open side of the second case portion 5b to form a battery case 5 with a storage space 5c. Of course, the first case portion 5a and the second case portion 5b can be of various shapes, such as a cylinder, a cuboid, etc.

[0073] In order to improve the sealing performance after the first box body part 5a and the second box body part 5b are connected, a sealing member, such as a sealant, a sealing ring, etc., may also be provided between the first box body part 5a and the second box body part 5b.

[0074] Assuming that the first box body portion 5a covers the top of the second box body portion 5b, the first box body portion 5a can also be called an upper box cover, and the second box body portion 5b can also be called a lower box.

[0075] In the battery 2, there can be one or more battery cells. If there are multiple battery cells, the multiple battery cells can be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells are connected in series and in parallel. The multiple battery cells can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cells is accommodated in the battery box 5; of course, multiple battery cells can also be connected in series, in parallel, or in mixed connection to form a battery module 6, and the multiple battery modules 6 are then connected in series, in parallel, or in mixed connection to form a whole, and accommodated in the battery box 5.

[0076] Figure 3 A schematic diagram of the structure of a battery module provided in some embodiments of the present application is shown in FIG. Figure 4 for Figure 3 A local enlarged structural diagram of the A, Figure 5 A schematic diagram of an exploded structure of a side plate and an end plate of a battery module provided in some embodiments of the present application, Figure 6 for Figure 5 Schematic diagram of the local enlarged structure at B.

[0077] Continue to refer Figures 3 to 6 The embodiment of the present application provides a battery module 6, which includes a plurality of battery cells 7, two side plates 10 and two end plates 20. The plurality of battery cells 7 are arranged along a first direction X, and the two side plates 10 are respectively arranged on both sides of the plurality of battery cells 7 along a second direction Y, the second direction Y intersects with the first direction X, and a through hole 11 is opened on the side plate 10. The two end plates 20 are respectively arranged at both ends of the plurality of battery cells 7 along the first direction X, and the end plates 20 include a plate body 21 and a connector 22, the connector 22 protrudes from the surface of the plate body 21, passes through the through hole 11 and fixes the side plates 10.

[0078] Exemplarily, the two end plates 20 and the two side plates 10 are connected to each other to form a housing space, and a plurality of battery cells 7 are housed in the housing space, and the two side plates 10 and the two side plates 10 can constrain the battery cells 7. The end plates 20 and the side plates 10 can be made of, but not limited to, metal or non-metal materials, for example, the metal material can be copper, aluminum or stainless steel, etc.; the non-metal material can be polyethylene, polypropylene, polyvinyl chloride or wood, etc. As an example, the end plates 20 and the side plates 10 can be made of the same material to simplify the preparation process and help reduce costs.

[0079] The connecting member 22 protrudes from the surface of the plate body 21 . The connecting member 22 may be a wall surface protruding from the plate body 21 in the first direction X, or a wall surface protruding from the plate body 21 in the second direction Y.

[0080] The connector 22 is used to fix the side panel 10. As an example, the connector 22 may be fixedly connected to the inner wall of the through hole 11 to fix the side panel 10, wherein the connection between the connector 22 and the inner wall of the through hole 11 may be, but not limited to, bolt connection, welding, riveting, clamping or bonding, etc. As another example, a portion of the connector 22 may protrude from the through hole 11, and the portion of the connector 22 protruding from the through hole 11 abuts against a side surface of the side panel 10 facing away from the panel body 21, so that a portion of the side panel 10 is clamped between the portion of the connector 22 protruding from the through hole 11 and the panel body 21.

[0081] The connection relationship between the connecting member 22 and the plate body 21 can be that the connecting member 22 is detachably connected to the plate body 21, or the connecting member 22 is integrally provided on the plate body 21. The connecting member 22 can be directly connected to the plate body 21, or it can be restricted to the plate body 21 by other components. As an example, the connection method of the connecting member 22 and the plate body 21 can be, but is not limited to, bolt connection, welding, riveting, clamping or bonding, etc.

[0082] Optionally, the connector 22 may be a columnar structure, a plate structure or a block structure. The connector 22 may be, but is not limited to, made of metal or non-metal materials, for example, the metal material may be copper, aluminum or stainless steel, etc.; the non-metal material may be polyethylene, polypropylene, polyvinyl chloride or wood, etc. As an example, the connector 22 and the plate body 21 may be made of the same material to simplify the preparation process and help reduce costs.

[0083] The contour shape of the connector 22 is adapted to the contour shape of the through hole 11. In other words, the projection shape of the connector 22 in the second direction Y is adapted to the projection shape of the through hole 11 in the second direction Y. The projection shape of the connector 22 in the second direction Y may be, but is not limited to, a circle, a rectangle, a triangle, or a trapezoid, and the projection shape of the through hole 11 in the second direction Y may be, but is not limited to, a circle, a rectangle, a triangle, or a trapezoid, and the like. As an example, the projection shape of the connector 22 in the second direction Y and the projection shape of the through hole 11 in the second direction Y are both circular.

[0084] The connector 22 of the above technical solution can pass through the through hole 11 on the side plate 10 and reliably fix the side plate 10 and the end plate 20. The operation is simple, which is conducive to simplifying the assembly steps between the end plate 20 and the side plate 10, so as to reduce the defect rate and assembly time, thereby improving the overall assembly yield and efficiency of the battery module 6. At the same time, it can also reduce the need for complex tools or special processes, thereby reducing the overall assembly cost of the battery module 6.

[0085] In some optional embodiments, the connecting member 22 is interference fit with the through hole 11 to further improve the connection firmness between the side plate 10 and the end plate 20 .

[0086] In some embodiments, the connecting member 22 includes a rod portion 221 and a fixing portion 222 , the rod portion 221 passes through the through hole 11 and connects the fixing portion 222 and the plate body 21 , and a portion of the side plate 10 is clamped between the fixing portion 222 and the plate body 21 .

[0087] Exemplarily, the rod 221 is connected between the fixing portion 222 and the plate body 21, the rod 221 passes through the through hole 11, and the fixing portion 222 abuts against the side surface of the side plate 10 facing away from the plate body 21, so that the fixing portion 222 and the plate body 21 clamp the side plate 10. The fixing portion 222 can be detachably connected to the rod 221, or it can be integrally provided on the rod 221. The fixing portion 222 can be directly connected to the rod 221, or it can be restricted to the rod 221 by other components. As an example, the connection method between the fixing portion 222 and the rod 221 can be, but is not limited to, bolt connection, welding, riveting, clamping or bonding, etc.

[0088] As an example, the fixing portion 222 and the rod portion 221 are detachably connected. During the assembly process of the end plate 20 and the side plate 10, after the rod portion 221 passes through the through hole 11, the fixing portion 222 is installed on the rod portion 221 so that a part of the side plate 10 is clamped between the fixing portion 222 and the plate body 21.

[0089] As another example, the fixing portion 222 is integrally provided on the rod portion 221. During the assembly process of the end plate 20 and the side plate 10, after the rod portion 221 passes through the through hole 11, the fixing portion 222 is located on the side of the side plate 10 facing away from the plate body 21. Then, an external action is applied to the fixing portion 222 to deform the fixing portion 222, so that a part of the side plate 10 is clamped between the fixing portion 222 and the plate body 21. The external action may be, but is not limited to, mechanical extrusion, heating, or heating and extrusion.

[0090] Optionally, the fixing portion 222 and the side plate 10 may be fixed to each other by friction generated by mutual contact, or may be fixed to each other by bonding the fixing portion 222 and the side plate 10.

[0091] The above technical solution can increase the contact area between the connecting member 22 and the side panel 10 by introducing the fixing portion 222 , as well as the clamping effect of the fixing portion 222 and the panel body 21 on the side panel 10 , thereby further improving the connection firmness between the end panel 20 and the side panel 10 .

[0092] In some embodiments, the rod portion 221 and the fixing portion 222 are an integrally formed structure, and the fixing portion 222 is configured to be formed by extruding the end of the connecting member 22 away from the end plate 20 after the connecting member 22 passes through the through hole 11 .

[0093] For example, during the assembly of the end plate 20 and the side plate 10, after the rod portion 221 passes through the through hole 11, the fixing portion 222 is located on the side of the side plate 10 facing away from the plate body 21, and then the fixing portion 222 is deformed by squeezing and fixing, so that a part of the side plate 10 is clamped between the fixing portion 222 and the plate body 21. The squeezing of the fixing portion 222 can be achieved by using simple tools, such as pliers, a wrench, or a press, etc., which can apply pressure to the fixing portion 222.

[0094] The rod portion 221 and the fixing portion 222 are an integrally formed structure. On the one hand, there is no need to connect the rod portion 221 and the fixing portion 222 through an additional connection process, which simplifies the manufacturing process. At the same time, compared with connecting the rod portion 221 and the fixing portion 222 through an additional connection process, the rod portion 221 and the fixing portion 222 in an integral structure have a higher connection firmness.

[0095] The above technical solution can further simplify the assembly steps between the end plate 20 and the side plate 10 to further reduce the defect rate and assembly time, thereby further improving the overall assembly yield and efficiency of the battery module 6.

[0096] In some embodiments, there are multiple connecting members 22 , and the multiple connecting members 22 are arranged at intervals along the third direction Z. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0097] For example, the number of the connectors 22 may be two, three, four or more, which may be selected according to the actual application environment.

[0098] The multiple connectors 22 can further improve the connection strength between the side plate 10 and the end plate 20 , thereby improving the reliability of the battery module 6 .

[0099] In some embodiments, the side plate 10 includes a first main body portion 12 and two bent portions 13, the two bent portions 13 are respectively connected to the two ends of the first main body portion 12 along the first direction X, and the through hole 11 is provided in the bent portion 13. The bent portion 13 includes a first section 131 and a second section 132, the first section 131 is connected between the second section 132 and the first main body portion 12, the first section 131 extends along the first direction X and is connected to the wall surface of the plate body 21 in the second direction Y, and the second section 132 extends along the second direction Y and is connected to the wall surface of the plate body 21 in the first direction X.

[0100] Exemplarily, the first main body 12 is the main part of the side plate 10 that forms the accommodation space together with the end plate 20, and is also the main part for constraining the battery cell 7. The first main body 12 is generally a flat plate structure, and the first main body 12 can be made of high-strength alloy material to improve structural strength and service life.

[0101] The bending portion 13 is the main part of the side plate 10 connected to the end plate 20. The first section 131 and the second section 132 of the bending portion 13 can be respectively connected to the wall surfaces of the plate body 21 in different directions. On the one hand, the side plate 10 can be better adapted to the structural shape of the plate body 21, that is, by flexibly adjusting the respective lengths of the first section 131 and the second section 132 and the angle between the first section 131 and the second section 132, to adapt to plate bodies 21 of different shapes and sizes. On the other hand, the contact area between the side plate 10 and the plate body 21 can also be increased to improve the overall structural stability of the battery module 6. The bending portion 13 is generally an L-shaped structure, and the bending portion 13 can be made of a high-strength alloy material to improve the structural strength and service life.

[0102] The bending portion 13 can be detachably connected to the first main body portion 12, or can be integrally provided on the first main body portion 12. The bending portion 13 can be directly connected to the first main body portion 12, or can be restricted on the first main body portion 12 by other components. As an example, the connection method between the bending portion 13 and the first main body portion 12 can be, but is not limited to, bolt connection, welding, riveting, clamping or bonding.

[0103] Optionally, the bending portion 13 and the first main body portion 12 are integrally formed. On the one hand, there is no need to connect the bending portion 13 and the first main body portion 12 through an additional connection process, which simplifies the manufacturing process. At the same time, compared with connecting the bending portion 13 and the first main body portion 12 through an additional connection process, the bending portion 13 and the first main body portion 12 in an integral structure have a higher connection firmness.

[0104] The second section 132 may be detachably connected to the first section 131, or may be integrally provided on the first section 131. The second section 132 may be directly connected to the first section 131, or may be restricted to the first section 131 by other components. As an example, the connection method between the second section 132 and the first section 131 may be, but is not limited to, bolt connection, welding, riveting, clamping or bonding.

[0105] Optionally, the first section 131 and the second section 132 are integrally formed. On the one hand, there is no need to connect the first section 131 and the second section 132 through an additional connection process, which simplifies the manufacturing process. At the same time, compared with connecting the first section 131 and the second section 132 through an additional connection process, the first section 131 and the second section 132 in an integral structure have a higher connection firmness.

[0106] The above technical solution, by introducing the bending portion 13, can not only enable the side panel 10 to better adapt to the structural shape of the panel body 21, thereby improving the versatility and flexibility of the side panel 10, but also increase the contact area between the side panel 10 and the panel body 21, thereby improving the overall structural stability of the battery module 6.

[0107] In some embodiments, the board body 21 includes a second main body portion 211 and a protrusion 212, the protrusion 212 protrudes from a side surface of the second main body portion 211 facing away from the battery cell 7, and the connector 22 is disposed on the second main body portion 211. The first section 131 and the second section 132 are both connected to the second main body portion 211, and one end of the second section 132 away from the first section 131 abuts against the protrusion 212.

[0108] Exemplarily, the second body portion 211 is the main part of the end plate 20 that forms the accommodation space together with the side plate 10, and is also the main part for constraining the battery cell 7. The second body portion 211 is generally a flat plate structure, and the second body portion 211 can be made of high-strength alloy material to improve structural strength and service life.

[0109] The convex portion 212 can provide additional structural support for the connection between the end plate 20 and the side plate 10. On the one hand, the end of the second section 132 away from the first section 131 abuts against the convex portion 212, and the convex portion 212 can limit the second section 132 along the second direction Y, thereby improving the stability of the side plate 10; on the other hand, the convex portion 212 can also play a certain positioning role. During the assembly process of the end plate 20 and the side plate 10, the positioning between the side plate 10 and the end plate 20 can be achieved by aligning the second section 132 with the convex portion 212.

[0110] The protrusion 212 can be detachably connected to the second main body 211, or can be integrally provided on the second main body 211. The protrusion 212 can be directly connected to the second main body 211, or can be restricted on the second main body 211 by other components. As an example, the connection method between the protrusion 212 and the second main body 211 can be, but is not limited to, bolt connection, welding, riveting, clamping or bonding.

[0111] Optionally, the convex portion 212 and the second main body portion 211 are integrally formed. On the one hand, there is no need to connect the convex portion 212 and the second main body portion 211 through an additional connection process, which simplifies the manufacturing process. At the same time, compared with connecting the convex portion 212 and the second main body portion 211 through an additional connection process, the convex portion 212 and the second main body portion 211 in an integral structure have a higher connection firmness.

[0112] The above technical solution can not only improve the stability between the end plate 20 and the side plate 10 by introducing the protrusion 212, but also make the entire assembly process of the end plate 20 and the side plate 10 more intuitive and simple, thereby further improving the assembly yield and efficiency of the battery module 6.

[0113] In some embodiments, the side surface of the second section 132 facing away from the second main body 211 is flush with the side surface of the convex portion 212 facing away from the second main body 211. This is beneficial to improve the flatness of the junction between the end plate 20 and the side plate 10, thereby improving the product quality of the battery module 6.

[0114] Figure 7 This is a schematic diagram of an exploded structure of another battery module 6 provided in some embodiments of the present application, wherein the side plate 10 and the end plate 20 cooperate with each other. Figure 8 for Figure 7 Schematic diagram of the local enlarged structure at C.

[0115] Continue to refer Figures 7 and 8 In some embodiments, at least one of the bending portion 13 and the plate body 21 is provided with an anti-slip layer 30 , and the anti-slip layer 30 is connected between the bending portion 13 and the body portion.

[0116] Exemplarily, the anti-slip layer 30 may be disposed on a side surface of the bending portion 13 close to the plate body 21, the anti-slip layer 30 may be disposed on a side surface of the plate body 21 close to the bending portion 13, or the anti-slip layer 30 may be disposed on both a side surface of the bending portion 13 close to the plate body 21 and a side surface of the plate body 21 close to the bending portion 13.

[0117] As an example, in the case where the anti-skid layer 30 is disposed on the side surface of the bending portion 13 close to the board body 21, the anti-skid layer 30 may be a concave-convex structure disposed on the side surface of the bending portion 13 close to the board body 21, and the concave-convex structure can increase the friction coefficient of the side surface of the bending portion 13 close to the board body 21, thereby improving the friction between the bending portion 13 and the board body 21; the anti-skid layer 30 may also be an anti-skid pad or anti-skid coating disposed on the side surface of the bending portion 13 close to the board body 21, thereby improving the friction between the bending portion 13 and the board body 21. Among them, when the anti-skid layer 30 is disposed on the side surface of the board body 21 close to the bending portion 13, the specific setting details of the anti-skid layer 30 can refer to the relevant description when the anti-skid layer 30 is disposed on the side surface of the bending portion 13 close to the board body 21, and will not be repeated here.

[0118] Optionally, the anti-slip layer 30 may be made of, but is not limited to, rubber, polyvinyl chloride, or polyurethane.

[0119] The above technical solution sets an anti-skid layer 30, which can increase the friction between the bending portion 13 and the plate body 21, thereby further improving the connection firmness between the end plate 20 and the side plate 10, thereby improving the reliability of the battery module 6.

[0120] Fig. 9 This is a schematic diagram of an exploded structure of the side plate 10 and the end plate 20 of another battery module 6 provided in some embodiments of the present application. Fig.10 for Fig. 9 Schematic diagram of the local enlarged structure at D.

[0121] Continue to refer Figures 9 and 10 In some embodiments, the side plate 10 further includes a friction member 40 , which is disposed on a surface of the side plate 10 facing away from the end plate 20 and around a circumferential edge of the through hole 11 .

[0122] Exemplarily, the main function of the friction member 40 is to increase the friction between the side plate 10 and the adjacent components. The friction member 40 has a high friction coefficient. During the assembly process of the end plate 20 and the side plate 10, the connecting member 22 can contact with the friction member 40 after passing through the through hole 11, thereby increasing the friction between the connecting member 22 and the side plate 10. It should be noted that the friction member 40 has a certain thickness. In other words, the friction member 40 has a certain size along the second direction Y. As an example, after the connecting member 22 passes through the through hole 11, the side surface of the connecting member 22 along the direction perpendicular to the second direction Y contacts the friction member 40; as another example, when the connecting member 22 includes a rod portion 221 and a fixing portion 222, the fixing portion 222 contacts the friction member 40 on one side surface close to the side plate 10.

[0123] Optionally, the friction member 40 may be made of, but is not limited to, rubber, polyvinyl chloride, polyurethane or other materials.

[0124] Optionally, the friction member 40 may be detachably connected to the side plate 10, or may be integrally provided on the side plate 10. The friction member 40 may be directly connected to the side plate 10, or may be restricted to the side plate 10 by other components. As an example, the connection between the friction member 40 and the side plate 10 may be, but is not limited to, bonding, clamping, or bolting.

[0125] The above technical solution can increase the friction between the connecting member 22 and the side plate 10 by providing the friction member 40 , thereby further improving the connection firmness between the end plate 20 and the side plate 10 , thereby improving the reliability of the battery module 6 .

[0126] Fig.11 A schematic structural diagram of an end plate 20 of another battery module 6 provided in some embodiments of the present application.

[0127] Continue to refer Fig.11 In some embodiments, a channel 23 is provided on the plate body 21 , and the channel 23 extends along the third direction Z. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0128] For example, the channel 23 can absorb energy and reduce shock. When the battery module 6 is subjected to external impact, the vibration amplitude of the battery cells 7 inside the battery module 6 can be reduced, thereby protecting the battery cells 7 and improving the reliability of the battery module 6. By providing the channel 23, the weight of the end plate 20 can also be reduced, which is conducive to improving the energy density of the battery module 6.

[0129] Optionally, the cross section of the channel 23 may be a trapezoid, rectangle, triangle, semicircle, circle, hexagon or other shapes, or a combination of multiple shapes, which can be selected according to actual conditions.

[0130] Optionally, the number of the channels 23 may be one or more. As an example, when the number of the channels 23 is plural, the channels 23 may be arranged along the second direction Y at intervals.

[0131] The above technical solution sets a channel 23 on the end plate 20. On the one hand, the channel 23 can absorb energy and reduce shock, thereby protecting the battery cells 7 and improving the reliability of the battery module 6; on the other hand, the channel 23 can also reduce the weight of the end plate 20, which is beneficial to improving the energy density of the battery module 6.

[0132] In some optional embodiments, the number of channels 23 is multiple, and the multiple channels 23 are arranged in a honeycomb structure. By utilizing the mechanical support and crushing energy absorption of the honeycomb structure, the bending and torsional strength of the end plate 20 can be effectively improved, and while making the end plate 20 lightweight, the overall structural strength of the end plate 20 is effectively improved, thereby effectively protecting the battery cells 7 inside the battery module 6, reducing the impact on the battery cells 7, and further improving the reliability of the battery module 6.

[0133] In some embodiments, the channel 23 penetrates the plate body 21 along the third direction Z, which can further reduce the weight of the end plate 20 and further improve the energy density of the battery module 6.

[0134] In some embodiments, the connecting member 22 and the plate body 21 are an integrally formed structure.

[0135] On the one hand, there is no need to connect the connector 22 to the board body 21 through an additional connection process, which simplifies the manufacturing process. At the same time, compared with connecting the connector 22 to the board body 21 through an additional connection process, the connector 22 with an integrated structure has a higher connection firmness with the board body 21.

[0136] According to some embodiments of the present application, the present application also provides a battery, comprising a battery module 6 of any of the above schemes.

[0137] According to some embodiments of the present application, the present application also provides an electrical device, comprising a battery according to any of the above schemes, wherein the battery is used to provide electrical energy.

[0138] In order to better understand the battery module 6 provided in the embodiment of the present application, based on the same inventive concept, an embodiment of the above-mentioned battery module 6 in actual application is provided here for illustration.

[0139] The embodiment of the present application provides a battery module 6, which includes a plurality of battery cells 7, two side plates 10 and two end plates 20. The plurality of battery cells 7 are arranged along a first direction X, and the two side plates 10 are respectively arranged on both sides of the plurality of battery cells 7 along a second direction Y, the second direction Y intersects with the first direction X, and a through hole 11 is opened on the side plate 10. The two end plates 20 are respectively arranged at both ends of the plurality of battery cells 7 along the first direction X, and the end plate 20 includes a plate body 21 and a connecting member 22, the connecting member 22 protrudes from the surface of the plate body 21, passes through the through hole 11 and fixes the side plate 10. The connecting member 22 includes a rod portion 221 and a fixing portion 222, the rod portion 221 passes through the through hole 11 and connects the fixing portion 222 and the plate body 21, a part of the side plate 10 is clamped between the fixing portion 222 and the plate body 21, and the fixing portion 222 is configured to be formed by pressing the end of the connecting member 22 away from the end plate 20 after the connecting member 22 passes through the through hole 11.

[0140] The connector 22 in the above technical solution is easy to operate, can quickly pass through the through hole 11 on the side plate 10 and reliably fix the side plate 10 and the end plate 20, which is conducive to simplifying the assembly steps between the end plate 20 and the side plate 10, so as to reduce the defect rate and assembly time, thereby improving the overall assembly yield and efficiency of the battery module 6. At the same time, it can also reduce the need for complex tools or special processes, thereby reducing the overall assembly cost of the battery module 6.

[0141] 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.

[0142] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery module, characterized in that: include: A plurality of battery cells arranged along a first direction; Two side plates, respectively disposed on both sides of the plurality of battery cells along a second direction, the second direction intersecting the first direction, the side plates being provided with through holes; Two end plates are respectively arranged at two ends of the plurality of battery cells along the first direction, and the end plates include a plate body and a connector, wherein the connector protrudes from a surface of the plate body, passes through the through hole and fixes the side plate.

2. The battery module according to claim 1, characterized in that: The connecting member includes a rod portion and a fixing portion, the rod portion passes through the through hole and connects the fixing portion and the plate body, and a portion of the side plate is clamped between the fixing portion and the plate body.

3. The battery module according to claim 2, characterized in that: The rod portion and the fixing portion are an integrally formed structure, and the fixing portion is configured to be formed by pressing the end portion of the connecting member away from the end plate after the connecting member passes through the through hole.

4. The battery module according to claim 1, characterized in that: There are multiple connecting members, and the multiple connecting members are arranged at intervals along the third direction. The first direction, the second direction and the third direction are perpendicular to each other.

5. The battery module according to claim 1, characterized in that: The side plate includes a first main body and two bent parts, the two bent parts are respectively connected to two ends of the first main body along the first direction, and the through hole is provided in the bent parts; The bending portion includes a first section and a second section, the first section is connected between the second section and the first main body, the first section extends along the first direction and is connected to the wall surface of the plate body in the second direction, and the second section extends along the second direction and is connected to the wall surface of the plate body in the first direction.

6. The battery module according to claim 5, characterized in that: The board body comprises a second main body portion and a convex portion, the convex portion protrudes from a side surface of the second main body portion facing away from the battery cell, and the connecting member is arranged on the second main body portion; The first section and the second section are both connected to the second main body, and one end of the second section away from the first section abuts against the convex portion.

7. The battery module according to claim 6, characterized in that: A surface of the second section facing away from the second main body is flush with a surface of the convex portion facing away from the second main body.

8. The battery module according to claim 5, characterized in that: At least one of the bending portion and the plate body is provided with an anti-slip layer, and the anti-slip layer is connected between the bending portion and the body portion.

9. The battery module according to claim 1, characterized in that: The side plate further comprises a friction member, which is arranged on a side surface of the side plate facing away from the end plate and surrounds the circumferential edge of the through hole.

10. The battery module according to claim 1, characterized in that: The plate body is provided with a channel, and the channel extends along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

11. The battery module according to claim 10, characterized in that: The channel penetrates the plate body along the third direction.

12. The battery module according to any one of claims 1 to 11, characterized in that: The connecting piece and the plate body are an integrally formed structure.

13. A battery, characterized in that: Comprising a battery module as described in any one of claims 1-12.

14. An electrical device, characterized in that: Comprising a battery as claimed in claim 13, the battery is used to provide electrical energy.

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