Split structure module end plate for battery module and battery module

Abstract

The invention provides a split structure module end plate for a battery module and the battery module, the module end plate comprises a first structural plate and a second structural plate, the first structural plate comprises a battery cell contact surface and a first abutting surface, the second structural plate comprises a ribbon contact surface and a second abutting surface, the first abutting surface faces and abuts against the second abutting surface, and the second abutting surface abuts against the second abutting surface. The battery cell body abuts against the battery cell contact surface, and the ribbon body abuts against the ribbon contact surface; at least one of the first abutting face and the second abutting face is provided with a reinforcing structure, the reinforcing structure comprises a plurality of groove bodies and a plurality of reinforcing ribs, and the reinforcing ribs are arranged between every two adjacent groove bodies. According to the module end plate, the module end plate is divided into the first structural plate and the second structural plate, a cavity topological structure can be constructed in the module end plate to enhance the structural strength and reduce the weight at the same time, then conventional materials can be selected to reduce the production cost, and meanwhile the light weight requirement can be met through formation of the cavity.

Description

Technical Field

[0001] This application relates to the field of power battery technology, and in particular to a split-structure module end plate for a battery module and a battery module. Background Technology

[0002] In the field of solid-state battery technology, ensuring tight contact at the internal interfaces of the cell is a core element for achieving high energy density and long cycle life. Because solid electrolytes lack the wetting effect of liquid electrolytes between themselves and electrode materials, high and uniform mechanical pressure (typically exceeding 10 MPa) must be applied to reduce interfacial impedance and effectively suppress lithium dendrite growth. However, the endplate structures used in traditional battery modules are primarily designed for liquid batteries, and their rigidity and pressure distribution uniformity are insufficient to meet the stringent pressure stability requirements of solid-state batteries. Given that solid-state cells require a continuously stable high-pressure environment and uniform pressure distribution during operation, the module endplate must possess excellent structural strength and rigidity.

[0003] Currently, the end plates of solid-state battery modules mainly adopt the following two technical solutions: The first is carbon fiber composite end plates: Although this solution can meet the requirements of solid-state cells for high voltage load and high structural strength, the material cost is high, which is not conducive to industrialization and promotion; The second is solid metal end plates (mainly made of aluminum alloy): Although this structure has the required mechanical properties, the solid design results in a large weight, which is not conducive to the lightweight design optimization of the battery pack.

[0004] Therefore, it is necessary to design a split-structure module end plate for battery modules to solve the above problems. Summary of the Invention

[0005] In view of this, in order to overcome the shortcomings of the prior art, the present invention provides a split structure module end plate for battery modules and a battery module, which effectively solves the problems of high cost, heavy weight and insufficient structural strength of existing solid-state battery module end plates.

[0006] According to a first aspect of the present invention, a split-structure module end plate for a battery module is provided. The battery module includes a cell body and a cable tie body. The split-structure module end plate for the battery module includes a first structural plate and a second structural plate. The first structural plate includes a cell contact surface and a first abutment surface disposed back-to-back with each other. The second structural plate includes a cable tie contact surface and a second abutment surface disposed back-to-back with each other. The first abutment surface faces and abuts against the second abutment surface. The cell body abuts against the cell contact surface, and the cable tie body abuts against the cable tie contact surface. At least one of the first abutment surface and the second abutment surface is provided with a reinforcing structure. The reinforcing structure includes a plurality of groove bodies and a plurality of reinforcing ribs. The reinforcing ribs are disposed between two adjacent groove bodies.

[0007] Preferably, the first abutting surface is further provided with a first positioning structure, and the second abutting surface is provided with a second positioning structure, wherein the first abutting surface is positioned and connected to the second abutting surface through the first positioning structure and the second positioning structure.

[0008] Preferably, the first positioning structure is formed as a columnar boss, a wedge-shaped locking block, a dovetail protrusion, or a magnetic suction element, and the second positioning structure is formed as a columnar sleeve, a wedge-shaped groove, a dovetail groove, or a magnetic suction element; or, the first positioning structure is formed as a columnar sleeve, a wedge-shaped groove, a dovetail groove, or a magnetic suction element, and the second positioning structure is formed as a columnar boss, a wedge-shaped locking block, a dovetail protrusion, or a magnetic suction element.

[0009] Preferably, the plurality of groove bodies are formed as quadrilateral grooves or hexagonal grooves to form a grid-like distribution structure, and the reinforcing ribs are arranged with the same thickness in the horizontal or vertical direction between two adjacent groove bodies.

[0010] Preferably, the reinforcing rib is formed in a wavy structure; and / or, the thickness of the reinforcing rib increases sequentially along the horizontal or vertical direction.

[0011] Preferably, the contact surface of the battery cell is formed as a plane.

[0012] Preferably, the two ends of the cable tie contact surface that abut against the cable tie body have transition rounded corners.

[0013] Preferably, the cable tie contact surface is provided with a limiting boss, and the side of the cable tie body can abut against the side of the limiting boss; there are multiple limiting bosses, which are spaced apart from each other, and the cable tie body is disposed between two adjacent limiting bosses.

[0014] According to a second aspect of the present invention, a battery module is provided, wherein the battery module includes a split-structure module end plate for a battery module as described above.

[0015] Preferably, both ends of the battery module are provided with the split structure module end plate for the battery module, and a cable tie body surrounds the two split structure module end plates for the battery module provided at both ends of the battery module.

[0016] According to the present invention, the split-structure module end plate for battery modules can be divided into two parts, a first structural plate and a second structural plate, to construct a cavity topology structure inside the module end plate. This strengthens the structure and reduces the weight, allowing the use of conventional materials to reduce production costs. At the same time, the formation of the cavity meets the requirements for lightweighting. By providing a reinforcing structure on the contact surface of the first structural plate and / or the second structural plate, the cell expansion force can be transmitted through the reinforcing ribs, increasing the contact surface area and reducing the contact surface stress.

[0017] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the structure of a split-structure module end plate for a battery module according to an embodiment of the present invention is shown; Figure 2 A schematic diagram of the structure of the first and second structural plates according to an embodiment of the present invention is shown from a first perspective. Figure 3 A structural schematic diagram of a first structural plate and a second structural plate according to an embodiment of the present invention is shown from a second perspective. Figure 4 A schematic diagram of the structure of a battery module according to an embodiment of the present invention is shown; Figure 5 A schematic diagram of a second structure of a second structural plate according to an embodiment of the present invention is shown.

[0020] Reference numerals in the attached drawings: 1-End plate body; 11-First structural plate; 111-First groove; 112-First reinforcing rib; 113-First positioning structure; 114-Cell contact surface; 12-Second structural plate; 121-Second groove; 122-Second reinforcing rib; 123-Second positioning structure; 124-Cable tie contact surface; 125-Transition fillet; 126-Limiting boss; 2-Cable tie body; 3-Cell body. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] According to a first aspect of the present invention, a split-structure module end plate for a battery module is provided, such as... Figures 1 to 5 As shown, the split-structure module end plate (end plate body 1 in the figure) is used for the battery module, such as... Figure 4 As shown, the battery module may include a cable tie body 2 and a cell body 3. The battery module uses a split structure module end plate, which includes a first structural plate 11 and a second structural plate 12.

[0026] In the following description, reference will be made to Figures 1 to 5 This section describes the detailed structure of the first structural plate 11 and the second structural plate 12 of the split-structure module end plate for the battery module.

[0027] like Figures 1 to 5 As shown in the embodiment, the battery module uses a split-structure module end plate composed of a first structural plate 11 and a second structural plate 12. The first structural plate 11 and the second structural plate 12 can be contacted and combined to form a module end plate. The first structural plate 11 includes a cell contact surface 114 and a first abutment surface arranged back to back. The second structural plate 12 includes a cable tie contact surface 124 and a second abutment surface arranged back to back. The first abutment surface faces and abuts against the second abutment surface. The cell body 3 abuts against the cell contact surface 114, and the cell contact surface 114 can be press-fitted with the cell body 3. The cable tie body 2 abuts against the cable tie contact surface 124 for cable tie installation.

[0028] By dividing the module end plate into a first structural plate 11 and a second structural plate 12, the first structural plate 11 and the second structural plate 12 are provided with different contact surfaces, and the first structural plate 11 and the second structural plate 12 can be combined with each other to form a module end plate. The first abutting surface and the second abutting surface of the first structural plate 11 and the second structural plate 12 can construct a cavity topology structure inside the module end plate to enhance structural strength while reducing weight.

[0029] Furthermore, at least one of the first structural plate 11 and the second structural plate 12 is provided with a reinforcing structure. For example, the first structural plate 11 can be formed as a flat plate structure, while the second structural plate 12 can be formed as a cavity topology structure including the reinforcing structure. In the embodiment, both the first structural plate 11 and the second structural plate 12 are provided with reinforcing structures. A first abutting surface is provided with a first reinforcing structure, and a second abutting surface is provided with a second reinforcing structure. The first reinforcing structure and the second reinforcing structure are correspondingly provided. Both the first reinforcing structure and the second reinforcing structure include multiple groove bodies and multiple reinforcing ribs. In the embodiment, the first reinforcing structure may include a first groove 111 and a first reinforcing rib 112. The number of first grooves 111 and the number of first reinforcing ribs 112 are both multiple. The second reinforcing structure may include a second groove 121 and a second reinforcing rib 122. The number of second grooves 121 and the number of second reinforcing ribs 122 are both multiple. The multiple first grooves 111 and the multiple second grooves 121 are provided in a one-to-one correspondence, and the multiple first reinforcing ribs 112 and the multiple second reinforcing ribs 122 are provided in a one-to-one correspondence. The first reinforcing rib 112 is disposed between two adjacent first grooves 111. In this embodiment, since the multiple first grooves 111 are arranged in a grid pattern, the first reinforcing rib 112 can separate two adjacent first grooves 111 in the horizontal and vertical directions respectively. Similarly, the second reinforcing rib 122 is disposed between two adjacent second grooves 121. Since the multiple second grooves 121 are arranged in a grid pattern, the second reinforcing rib 122 can separate two adjacent second grooves 121 in the horizontal and vertical directions respectively. By providing a one-to-one correspondence between the first reinforcing rib 112 and the second reinforcing rib 122, the expansion force of the battery cell can be transmitted through the contact of the reinforcing ribs. The one-to-one correspondence of the reinforcing ribs can also increase the contact surface area and reduce the contact surface stress.

[0030] The battery module uses a split-structure module end plate, which divides the module end plate into two parts: a first structural plate 11 and a second structural plate 12. This allows for the construction of a cavity topology within the module end plate, thereby enhancing structural strength and reducing weight. This also allows for the use of conventional materials, reducing production costs. Furthermore, the cavity formation meets the requirements for lightweight design. By setting reinforcing structures on the contact surfaces of the first structural plate 11 and / or the second structural plate 12, the expansion force of the battery cell can be transmitted through the reinforcing ribs, increasing the contact surface area and reducing the contact surface stress.

[0031] Preferably, such as Figure 2 and Figure 3As shown in the embodiment, in order to ensure that the first structural plate 11 and the second structural plate 12 can be positioned and connected to each other, the first abutting surface is also provided with a first positioning structure 113, and the second abutting surface is provided with a second positioning structure 123. In the embodiment, the first positioning structure 113 and the second positioning structure 123 are both disposed between multiple groove bodies (i.e., multiple first grooves 111 and multiple second grooves 121), and the first abutting surface is positioned and connected to the second abutting surface through the first positioning structure 113 and the second positioning structure 123. The first positioning structure 113 and the second positioning structure 123 can realize structural alignment, ensure the assembly and corresponding accuracy of the reinforcing ribs, and avoid local stress concentration caused by insufficient contact area due to misalignment of the reinforcing ribs; the first positioning structure 113 and the second positioning structure 123 can also realize peripheral structural matching, maintain the circumferential alignment of the first structural plate 11 and the second structural plate 12, and ensure the assembly consistency of the cable tie body 2; the first positioning structure 113 and the second positioning structure 123 can also achieve the purpose of anti-slip, and the positioning structure can have sufficient strength to resist the shear force of the contact surface.

[0032] Preferably, such as Figure 2 and Figure 3 As shown, in the embodiment, the first positioning structure 113 and the second positioning structure 123 preferably adopt a positioning structure with a columnar boss and a columnar groove. However, it is not limited to this. It can also adopt a wedge-shaped snap-fit, a dovetail groove, or a magnetic adsorption. That is, the first positioning structure 113 can be formed as a columnar boss, a wedge-shaped snap block, a dovetail protrusion, or a magnetic attractant, and the second positioning structure 123 can be formed as a columnar sleeve, a wedge-shaped groove, a dovetail groove, or a magnetic attractant; or, the first positioning structure 113 can be formed as a columnar sleeve, a wedge-shaped groove, a dovetail groove, or a magnetic attractant, and the second positioning structure 123 can be formed as a columnar boss, a wedge-shaped snap block, a dovetail protrusion, or a magnetic attractant.

[0033] Preferably, such as Figure 2 and Figure 3 As shown, in this embodiment, multiple groove bodies can be formed as quadrilateral or hexagonal grooves to constitute a grid-like distribution structure. Reinforcing ribs of the same thickness are arranged between two adjacent groove bodies in a horizontal or vertical direction. The reinforcing ribs (first reinforcing rib 112 and second reinforcing rib 122) can improve the bending strength of the module end plate in the X / Y / Z directions through grid-like distribution. A reasonable configuration of the thickness and number of reinforcing ribs can significantly improve the bending strength of the module end plate. The combination of the thickness and number of reinforcing ribs needs to be verified through finite element analysis to avoid local stress concentration or excessive weight increase.

[0034] Preferably, in the embodiments, the reinforcing ribs can be designed into other structural shapes to improve the bending strength of the module end plate, such as a wavy continuous rib structure, a honeycomb reinforcing mesh, or a gradient thickness distribution design, that is, the thickness of the reinforcing ribs increases or decreases sequentially along the horizontal or vertical direction.

[0035] Preferably, such as Figures 1 to 3 As shown, in the embodiment, the cell contact surface 114 can be formed as a plane, which can directly or indirectly contact the cell body 3 and needs to meet certain flatness requirements to ensure the uniformity of pressure exerted by the module end plate on the large surface of the cell body 3.

[0036] Preferably, such as Figures 1 to 3 As shown in the embodiment, the two ends of the cable tie contact surface 124 that abut against the cable tie body 2 have transition fillets 125. The cable tie contact surface 124 and the transition fillets 125 can form a continuous and smooth curved surface, and make contact with the inner side of the cable tie body 2. The cable tie body 2 and the module end plate mainly transmit the cell pressure through this curved surface. It should be noted that the curved surface needs to maintain the maximum contact area with the cable tie body 2 to reduce the contact stress with the cable tie body 2, so as to minimize the stress on the contact surface between the module end plate and the cable tie body 2.

[0037] Preferably, such as Figures 1 to 3 As shown, in this embodiment, the cable tie contact surface 124 is provided with a limiting boss 126, and the side of the cable tie body 2 can abut against the side of the limiting boss 126. However, it is also possible to omit the limiting boss 126, so that the cable tie body 2 directly contacts the cable tie contact surface 124 through frictional resistance.

[0038] Furthermore, there are multiple limiting protrusions 126, which are spaced apart from each other, and the cable tie body 2 is disposed between two adjacent limiting protrusions 126. In the embodiment, the number of limiting protrusions 126 can be selectively arranged, for example, as shown in the figure. Figure 5 As shown, three limiting protrusions 126 are provided. The middle limiting protrusion 126 protrudes further than the limiting protrusions 126 on both sides. This allows for a limiting protrusion 126 to be provided at one end of the cable tie body 2, thus providing unidirectional limiting and achieving unidirectional positioning and restricting unidirectional sliding; or, as... Figures 1 to 3 As shown, a limiting boss 126 is provided at both ends of a cable tie body 2, which provides bidirectional limiting to achieve bidirectional positioning and restrict bidirectional sliding. A setting position for a cable tie body 2 can be formed between the two limiting bosses 126. The number of setting positions is consistent with the number of cable tie bodies 2, and can be, for example, one to eight, to achieve reasonable configuration of the cable tie bodies 2.

[0039] by Figures 1 to 3 Taking the module end board in the middle as an example, Figures 1 to 3 The module end plate shown has overall dimensions of 378.6*102*24mm. The first structural plate 11 is 6.5mm thick, and the first reinforcing rib 112 has a wall thickness of 3.5mm. The first reinforcing rib 112 adopts a crisscrossing straight reinforcing rib design, with a horizontal spacing of 12.5mm and a vertical spacing of 10mm. The second structural plate 12 is 17.5mm thick, and the second reinforcing rib 122 is arranged in the same manner as the first reinforcing rib 112. The second structural plate 12 has four cable tie positions with a rounded corner radius of 12mm and adopts a design with bidirectional limiting bosses 126. The module end plate is made of aluminum alloy and manufactured by die casting, weighing 1.35kg. This design can meet the design requirements of 20MPa expansion force and pressure uniformity of less than 20% for the battery cell body 3, and the total pressure of the battery cell contact surface 114 is approximately 737.7kN.

[0040] like Figure 5 As shown, the second structural plate 12 of the module end plate includes four cable tie positions, employing a unidirectional limiting design to achieve unidirectional positioning and limit unidirectional sliding. The total thickness of the central boss is 24mm, and its length, width, reinforcing rib positions, and materials are consistent with... Figures 1 to 3 The module endplate is the same as the one in the middle, and it weighs 1.35kg.

[0041] The battery module uses a split-structure module end plate, which divides the module end plate into two parts: a first structural plate and a second structural plate. This allows for the construction of a cavity topology within the module end plate, thereby enhancing structural strength and reducing weight. This also allows for the use of conventional materials, reducing production costs. Furthermore, the cavity formation meets the requirements for lightweight design. By setting reinforcing structures on the contact surfaces of the first and / or second structural plates, the expansion force of the battery cells can be transferred through the reinforcing ribs, increasing the contact surface area and reducing the contact surface stress.

[0042] In addition, such as Figure 4 As shown, according to a second aspect of the present invention, a battery module is provided, the battery module including the split-structure module end plates for battery modules as described above. A module end plate is provided at both ends of the battery cell body 3 of the battery module, and the battery cell body 3 and the two module end plates are fixedly connected by a cable tie body 2.

[0043] The expansion force of the cell body 3 acts on the cell contact surface 114 on the first structural plate 11 of the module end plate, and is transmitted to the contact surface of the first structural plate 11 and the second structural plate 12 through the first reinforcing rib 112 of the first structural plate 11. It is then dispersed to the cable tie contact surface 124 and the transition rounded corner 125 through the second reinforcing rib 122 of the second structural plate 12. The pressure of the cable tie body 2 acts on the cable tie contact surface 124 and the transition rounded corner 125 of the second structural plate 12. It prevents slippage through the limiting boss 126 and is transmitted to the contact surface groove through the second reinforcing rib 122 of the second structural plate 12. The first reinforcing rib 112 of the first structural plate 11 transmits the reaction force back to the cell contact surface 114, forming a mechanical closed loop.

[0044] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The scope of protection of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A split structure module end plate for a battery module including a cell body and a strap body, characterized by, The battery module uses a split structure module end plate, which includes a first structure plate and a second structure plate, the first structure plate includes a cell contact surface and a first abutting surface arranged opposite to each other, the second structure plate includes a strap contact surface and a second abutting surface arranged opposite to each other, the first abutting surface faces and abuts the second abutting surface, the cell body abuts the cell contact surface, and the strap body abuts the strap contact surface. At least one of the first abutting surface and the second abutting surface is provided with a reinforcing structure, which includes a plurality of groove bodies and a plurality of reinforcing ribs, and the reinforcing ribs are arranged between two adjacent groove bodies.

2. The split structure module end plate for a battery module according to claim 1, characterized by, The first abutting surface is further provided with a first positioning structure, the second abutting surface is provided with a second positioning structure, and the first abutting surface is positioned and connected with the second abutting surface through the first positioning structure and the second positioning structure.

3. The split structure module end plate for a battery module according to claim 2, characterized by The first positioning structure is formed as a columnar boss, a wedge-shaped clamping block, a dovetail protrusion or a magnetic attraction piece, and the second positioning structure is formed as a columnar sleeve, a wedge-shaped groove, a dovetail groove or a magnetic attraction piece; or, the first positioning structure is formed as a columnar sleeve, a wedge-shaped groove, a dovetail groove or a magnetic attraction piece, and the second positioning structure is formed as a columnar boss, a wedge-shaped clamping block, a dovetail protrusion or a magnetic attraction piece.

4. The split structure module end plate for a battery module according to claim 1, characterized by, A plurality of groove bodies are formed as quadrilateral grooves or hexagonal grooves to constitute a grid distribution structure, and the reinforcing ribs are arranged between two adjacent groove bodies in the horizontal or vertical direction with the same thickness.

5. The split structure module end plate for a battery module according to claim 4, characterized by The reinforcing ribs are formed as a wave structure; and / or, the thickness of the reinforcing ribs increases in sequence in the horizontal or vertical direction.

6. The split structure module end plate for a battery module according to claim 1, characterized by The cell contact surface is formed as a plane.

7. The split structure module end plate for a battery module according to Claim 1, wherein The strap contact surface and the two ends of the strap body abutting each other are formed with a transition fillet.

8. The split structure module end plate for a battery module according to claim 1, characterized by, The strap contact surface is provided with a limiting boss, and the side edge of the strap body can abut the side surface of the limiting boss. The number of limiting bosses is a plurality, and a plurality of limiting bosses are arranged at intervals, and the strap body is arranged between two adjacent limiting bosses.

9. A battery module, characterized by The battery module includes the battery module split structure module end plate of any one of claims 1 to 8.

10. The battery module of claim 9, wherein, The battery module is provided with the battery module split structure module end plate at both ends, and one strap body surrounds the two battery module split structure module end plates arranged at both ends of the battery module.

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