Battery end plate made of metal plate

Abstract

The utility model relates to the technical field of battery end plates, in particular to a battery end plate made of metal plates, which comprises a base plate, the left edge and the right edge of the base plate are respectively provided with a first bending portion in a bending mode, and the upper edge and the lower edge of the base plate are respectively provided with a second bending portion in a bending mode. The first bending part and the second bending part are welded at the opposite angle positions of the corresponding base plate to form an enclosed structure, and a reinforcing framework used for reinforcing the strength of the base plate is further welded in the area, located in the first bending part and the second bending part, of the base plate. The enclosing structure formed by bending the base plate endows the end plate foundation with a rigid frame, the welded reinforcing framework specifically enhances the bearing capacity of key parts, and the enclosing structure and the welded reinforcing framework act synergistically, so that the problem of insufficient forming strength of traditional metal plate stamping and welding is effectively solved, the battery end plate can stably support and fix a battery cell group, and the service life of the battery end plate is prolonged. And various external forces in the use process can be borne.

Description

Technical Field

[0001] This utility model relates to the field of battery end plate technology, and in particular to a battery end plate made of sheet metal. Background Technology

[0002] In the field of new energy battery technology, battery end plates, as important structural components of battery modules, play a crucial role in the safety, stability, and overall performance of batteries. Traditionally, battery end plates are generally made of aluminum profiles. Although this process can ensure good structural strength and dimensional accuracy, the high cost of raw materials and processing of aluminum profiles leads to high production costs for battery end plates, which is not conducive to the large-scale promotion and cost control of new energy battery products.

[0003] To reduce production costs, the industry has gradually explored casting or sheet metal stamping and welding processes for manufacturing battery end plates. Casting can achieve one-time molding of complex structures, reducing mold costs to some extent, but it suffers from defects such as lower molding precision and susceptibility to internal porosity. Sheet metal stamping and welding, by welding multiple stamped components together, reduces material and processing costs to some extent. However, in practical applications, battery end plates manufactured using this process exhibit insufficient weld strength in critical areas such as the radius, making them prone to structural failure during use. This severely impacts battery safety and lifespan, failing to meet the ever-increasing performance demands of new energy batteries. Therefore, there is an urgent need to develop a battery end plate manufacturing process and product that can effectively reduce costs while ensuring structural strength and reliability. Utility Model Content

[0004] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0005] A sheet metal battery end plate includes a base plate. The left and right edges of the base plate are bent with first bends, and the upper and lower edges are bent with second bends. The first and second bends are welded at diagonal positions on the corresponding base plates to form an enclosure structure. A reinforcing structure for strengthening the base plate is welded to the area within the first and second bends on the base plate. Specifically: a reinforcing rib is provided on the first bend; an inner cavity is formed between the first bend and the base plate; fixing holes communicating with the inner cavity are provided at both ends of the second bend; and hole reinforcement members for reinforcing the fixing holes are provided within the inner cavity; a terminal fixing portion is also provided on the second bend located at the upper edge of the base plate.

[0006] Preferably, the reinforcing structure includes at least one cell baffle, which has a main body and vertical portions formed by bending along both sides of the main body, so that the cross-section of the cell baffle is formed into an inverted shape, and the cell baffle is welded to the substrate through the vertical portions.

[0007] Preferably, at least two cell baffles are provided, which are distributed parallel to each other or perpendicular to each other. When the two cell baffles are set to be perpendicular to each other, the overlapping positions of the two cell baffles are mutually accommodated by providing a first notch.

[0008] Preferably, the battery cell baffle is configured to be laterally aligned with the two first bends at both ends, and the thickness of the battery cell baffle is greater than the thickness of the first bends, so that a height difference is created between the battery cell baffle and the first bends to form a limiting part.

[0009] Preferably, the battery cell retainer is configured to be laterally connected to two first bends at both ends, and a second notch is provided at the position where the first bend connects to the battery cell retainer, with the end of the battery cell retainer being positioned and engaged with the second notch.

[0010] Preferably, the reinforcing rib is a convex structure formed on the first bend, or the reinforcing rib is a snap-fit ​​structure formed by bending on the first bend.

[0011] Preferably, the edge of the first bend is spaced apart from the substrate, and the hole reinforcement is a structure that bends and extends along the edge of the second bend. The hole reinforcement is in normal contact with the substrate, or the hole reinforcement overlaps with the end of the second bend. When the hole reinforcement overlaps with the end of the second bend, the fixing hole passes through the hole reinforcement.

[0012] Preferably, the hole reinforcement is a sheet metal part welded between the substrate and the bent portion, and the sheet metal part is axially offset from the fixed hole.

[0013] Preferably, a steel reinforcement is also provided in the inner cavity. The steel reinforcement is normally connected between the first bend and the substrate. The steel reinforcement is also normally connected to the axis of the fixing hole. A clearance hole is provided on the steel reinforcement to allow space in the direction of the axis of the fixing hole.

[0014] Preferably, the terminal fixing part is a nut structure welded and fixed on the second bend, or the terminal fixing part is a snap-fit ​​structure formed by bending on the second bend to lock the terminal.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] In terms of structural strength, the enclosed structure formed by bending the substrate provides a rigid frame for the end plate foundation, while the welded reinforcement structure specifically enhances the load-bearing capacity of key parts. The two work together to effectively solve the problem of insufficient strength in traditional sheet metal stamping and welding, enabling the battery end plate to stably support and fix the cell assembly and withstand various external forces during use.

[0017] In terms of cost control, compared with the traditional aluminum profile manufacturing process, the substrate bending process reduces the use of complex processing steps and expensive raw materials, which greatly reduces the production cost. Welding can be done by resistance welding without the need for additional welding materials. The metal is fused by the heat generated by the current. With the welding reinforcement structure, there is no need to use high-cost overall reinforcement materials. By strengthening the local structure, expenses can be further saved while ensuring performance.

[0018] From the perspective of processing convenience, resistance welding is simple to operate and fast to weld, requiring no complicated pre-weld preparation and post-weld treatment. It is highly compatible with the processes of substrate bending and welding reinforcement structures, has moderate requirements for processing equipment and technology, and is easy to achieve mass production. This not only greatly improves production efficiency but also reduces processing difficulty and shortens the product production cycle, providing strong support for the rapid production and promotion of new energy battery packs. In addition, the deformation generated during resistance welding is small and the welding quality is stable, which can better ensure the dimensional accuracy and appearance quality of the battery end plate, further improving product quality.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural schematic diagram of one embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of another embodiment of the present invention;

[0023] Figure 3 This is a structural schematic diagram of another embodiment of the present invention;

[0024] Figure 4 This is a structural schematic diagram of another embodiment of the present invention;

[0025] Figure 5 This is a partial cross-sectional structural diagram of one embodiment of the hole reinforcement component of this utility model;

[0026] Figure 6 This is a partial cross-sectional structural diagram of another embodiment of the hole reinforcement of this utility model;

[0027] Figure 7 This is a partial cross-sectional structural schematic diagram of another embodiment of the hole reinforcement of this utility model;

[0028] Figure 8 This is a partial structural diagram of the steel bar reinforcement component of this utility model.

[0029] The reference numerals and names in the figure are as follows:

[0030] Substrate 10, first bent portion 11, second notch portion 111, second bent portion 12, reinforcing rib 13, inner cavity portion 14, fixing hole position 15, hole position reinforcement member 16, terminal fixing portion 17, steel strip reinforcement member 18, clearance hole 181, limiting portion 19, reinforcing structure 20, battery cell retaining strip 21, main body portion 211, vertical portion 212, first notch portion 213. Detailed Implementation

[0031] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] Please see Figure 1-8 In this embodiment of the present invention, a sheet metal battery end plate includes a substrate 10. The left and right edges of the substrate 10 are respectively bent with first bending portions 11, and the upper and lower edges of the substrate 10 are respectively bent with second bending portions 12. The first bending portions 11 and the second bending portions 12 are welded at corresponding diagonal positions of the substrate 10 to form an enclosing structure. A reinforcing frame 20 for strengthening the substrate 10 is also welded to the area on the substrate 10 within the first bending portions 11 and the second bending portions 12. Among them: a reinforcing rib 13 is provided on the first bending portion 11; an inner cavity 14 is formed between the first bending portion 11 and the substrate 10; fixing holes 15 communicating with the inner cavity 14 are provided at both ends of the second bending portion 12; and hole reinforcement members 16 for reinforcing the fixing holes 15 are also provided in the inner cavity 14; a terminal fixing portion 17 is also provided on the second bending portion 12 located at the upper edge of the substrate 10.

[0033] The sheet metal battery end plate is designed specifically for fixing the battery pack. With the base plate 10 as the core carrier, its left and right edges are bent to form first bent portions 11, and its upper and lower edges are bent to form second bent portions 12. The first and second bent portions are welded at opposite corners of the base plate 10 to form a stable enclosure frame. The area on the base plate 10 located within the bent portions is provided with a reinforcing structure 20 to enhance the overall rigidity. The reinforcing ribs 13 on the first bend 11 not only strengthen the overall structure but also precisely fit the steel bars, ensuring that the steel bars can stably surround the two battery end plates during the initial fixing of the cell assembly. The inner cavity 14 between the first bend 11 and the substrate 10, together with the fixing holes 15 at both ends of the second bend 12 that connect to the inner cavity, and the hole reinforcement 16 inside the cavity, provide a reliable structure for the screw to pass through and fix, facilitating a stable connection between the battery end plates and the base plate. The terminal fixing part 17 located on the upper edge of the second bend 12 on the substrate 10 provides a precise interface for the installation of battery terminals. The design of each structure closely revolves around the battery pack fixing process, with each component interlocking with the others. From the initial fixing of the cell assembly to the connection with the battery pack base plate, and then to the installation of the battery terminals, a complete and efficient battery pack fixing structure system is formed.

[0034] The bent and welded enclosure structure and reinforced frame 20 reduce costs while ensuring the strength of the end plate, effectively withstanding external forces during cell assembly fixing and use. The cooperation of the reinforcing ribs 13, fixing holes 15, and hole reinforcement parts 16 makes the initial and final fixing of the cell assembly to the base plate more convenient and secure, significantly improving battery assembly efficiency and enhancing the overall connection stability, ensuring the reliability of the battery assembly during operation. The terminal fixing part 17 precisely matches the battery terminals, optimizing the electrical connection process of the battery assembly, reducing installation errors, and improving production efficiency. The overall structural design fully considers the needs of the entire battery assembly fixing process, and the synergistic effect of each component not only reduces the difficulty of processing and assembly but also improves the safety and service life of the battery assembly.

[0035] In terms of structural strength, the enclosed structure formed by bending the substrate 10 provides a rigid frame for the end plate foundation, while the welded reinforcement structure 20 specifically enhances the load-bearing capacity of key parts. The two work together to effectively solve the problem of insufficient strength in traditional sheet metal stamping and welding, enabling the battery end plate to stably support and fix the cell assembly and withstand various external forces during use.

[0036] In terms of cost control, the bending of the substrate 10 reduces complex processing steps and expensive raw material usage compared to the traditional aluminum profile manufacturing process, which greatly reduces production costs. Welding can be done by resistance welding without the need for additional welding materials. The metal is fused by the heat generated by the current. With the welding reinforcement structure 20, there is no need to use high-cost overall reinforcement materials. By strengthening the local structure, expenses are further saved while ensuring performance.

[0037] From the perspective of processing convenience, resistance welding is simple to operate and fast to weld, requiring no complicated pre-weld preparation and post-weld treatment. It has high process compatibility with the bending of the substrate 10 and the welding of the reinforcing structure 20. It has moderate requirements for processing equipment and technology, and is easy to achieve mass production. It not only greatly improves production efficiency, but also reduces processing difficulty and shortens the product production cycle, providing strong support for the rapid production and promotion of new energy battery packs. In addition, the deformation generated during resistance welding is small and the welding quality is stable, which can better ensure the dimensional accuracy and appearance quality of the battery end plate, further improving product quality.

[0038] Based on the structural design of Enhanced Architecture 20, the following implementation methods are adopted:

[0039] Firstly: such as Figure 1-2 As shown, the reinforced structure 20 includes at least one cell retainer 21. The cell retainer 21 has a main body 211 and vertical portions 212 formed by bending along both sides of the main body 211, so that the cross-section of the cell retainer 21 is U-shaped. The cell retainer 21 is welded to the substrate 10 through the vertical portions 212. This unique cross-sectional structure can form a stable three-dimensional support frame after being welded and fixed to the substrate 10. That is, the U-shaped structure itself has good anti-deformation ability, which can enhance the structural stability of the battery end plate under stress, so that the end plate can better withstand external pressure and vibration, and ensure the safety and reliability of the cell during the operation of the battery pack.

[0040] Secondly: such as Figure 3-4As shown, at least two cell retainers 21 are provided, which greatly enhances the overall strength and stability of the battery end plate by increasing the number of retainers. The at least two cell retainers 21 are distributed parallel to each other or perpendicular to each other. When the two cell retainers 21 are set to be perpendicular to each other, the overlapping positions of the two cell retainers 21 are mutually accommodated by the first notch 213. The parallel cell retainers 21 can form a continuous supporting force in the same direction, effectively dispersing the pressure applied externally. The perpendicularly distributed cell retainers 21, through the accommodation of the first notch 213, cleverly achieve a crisscrossing reinforcement effect, constructing a more stable grid-like reinforcement structure 20, which strengthens the strength of the substrate 10 in all directions and improves the overall structural rigidity of the battery pack. Regardless of the distribution method, the synergistic effect of multiple cell retainers 21 can significantly improve the fixing effect of the battery end plate on the cell pack, adapting to the battery stability requirements under different usage scenarios.

[0041] Thirdly: such as Figure 3 As shown, the cell retainer 21 is configured to laterally connect to two first bends 11 at both ends, and a second notch 111 is provided at the position where the first bend 11 connects to the cell retainer 21. The end of the cell retainer 21 is positioned and engaged with the second notch 111. This design optimizes the overall connection structure of the battery end plate. The end of the cell retainer 21 is precisely positioned with the second notch 111, ensuring accurate positioning during installation and improving assembly efficiency. At the same time, the connection between the cell retainer 21 and the first bend 11 tightly integrates the substrate 10, the cell retainer 21, and the first bend 11, forming a coherent force-bearing system. This allows the force to be effectively transmitted and dispersed among the components when the battery end plate is subjected to external force, enhancing the overall structural strength and impact resistance of the end plate, and further improving the reliability and stability of the battery end plate in fixing the cell assembly.

[0042] Based on the structural design of the adaptable steel bars, the following implementation methods are adopted:

[0043] Firstly: such as Figure 1As shown, the cell retainer 21 is configured to laterally connect with the two first bends 11 at both ends, and the thickness of the cell retainer 21 is greater than the thickness of the first bends 11, so that a height difference is created between the cell retainer 21 and the first bends 11 to form a limiting part 19. When the limiting part 19 is provided, the steel strip can be restricted, and the reinforcing rib 13 is not required. By setting the cell retainer 21 with a thickness greater than the first bends 11, and making it laterally connect with the two first bends 11, the limiting part 19 is formed by the thickness difference between the two. This limiting part 19 can accurately abut against the steel strip, and the blocking effect generated by the height difference effectively restricts the displacement of the steel strip, providing a stable constraint for the initial fixation of the cell assembly, avoiding loosening, falling off, or shifting of the steel strip during assembly or use, and ensuring the reliability of the cell assembly fixation; at the same time, this structure uses the size difference of existing components to form a limiting function, without the need to add additional parts, simplifying the structural design and production process, reducing production costs, and enhancing the structural correlation and overall strength between the components of the battery end plate.

[0044] Secondly: such as Figure 2 As shown, the reinforcing rib 13 is a convex structure formed on the first bending part 11. The convex structure, through local protrusion, fits tightly with the steel strip, providing stable support and limiting force, and effectively preventing the steel strip from sliding on the first bending part 11.

[0045] Thirdly: such as Figure 3 As shown, the reinforcing rib 13 is a snap-fit ​​structure formed by bending on the first bending part 11. This structure can be formed directly by tangenting and bending on the first bending part 11 without complicated processing technology and additional assembly process. This not only improves production efficiency, but also ensures the structural strength and stability of the reinforcing rib 13 and the first bending part 11, so that the steel strip can be more firmly wrapped around the battery end plate, providing a reliable guarantee for the fixation of the battery cell pack, and improving the overall structural performance and assembly convenience of the battery pack.

[0046] Based on the structural design of the hole reinforcement 16, the following implementation methods are adopted:

[0047] Firstly: such as Figure 5-6 As shown, the edge of the first bent portion 11 is spaced apart from the substrate 10, and the hole reinforcement 16 is a structure that extends and bends along the edge of the second bent portion 12, wherein, as Figure 5 As shown, the hole reinforcement 16 is normally abutted against the substrate 10, or as... Figure 6As shown, the hole reinforcement 16 overlaps with the end of the second bend 12, and when the hole reinforcement 16 overlaps with the end of the second bend 12, the fixing hole 15 passes through the hole reinforcement 16. The hole reinforcement 16 is designed to extend along the edge of the second bend 12, and by abutting the substrate 10 in the normal direction or overlapping with the end of the second bend 12, the structural strength of the fixing hole 15 is significantly enhanced. When the hole reinforcement 16 abuts the substrate 10, it can disperse the external force on the fixing hole 15 to the substrate. The larger area effectively avoids stress concentration; when the hole reinforcement 16 overlaps with the end of the second bending part 12 and the fixing hole 15 passes through, it is equivalent to increasing the material thickness and support points at the hole, which greatly improves the tensile and shear resistance of the hole, making the screw more stable when passing through the fixing hole 15, preventing the connection between the battery end plate and the base plate from loosening due to hole deformation, and ensuring the reliability of battery pack fixing. At the same time, this structural design makes full use of bending extension characteristics to strengthen key parts without increasing material costs.

[0048] Secondly: such as Figure 7 As shown, the hole reinforcement 16 is a sheet metal part welded between the base plate 10 and the bent portion, and the sheet metal part has an axial clearance fit with the fixing hole 15. The sheet metal part, with its own strength and welding process, can firmly connect the base plate 10 and the bent portion, forming a stable triangular support structure, effectively dispersing the load borne by the fixing hole 15. The clearance fit design not only ensures the smooth installation of connecting parts such as screws, but also avoids interference between the reinforcement and the fixing hole 15 during the assembly process, simplifying the installation process and improving production efficiency.

[0049] In addition, such as Figure 8 As shown, a steel reinforcement 18 is also provided in the inner cavity 14. The steel reinforcement 18 is normally connected between the first bending portion 11 and the substrate 10. The steel reinforcement 18 is also normally connected to the axis of the fixing hole 15. A clearance hole 181 is provided on the steel reinforcement 18 to allow for the clearance of the fixing hole 15 along the axis. The steel reinforcement 18 can effectively support and transmit the pressure generated by the steel bar around the battery end plate, avoiding deformation due to excessive local stress. The setting of the clearance hole 181 ensures the normal installation of fasteners such as screws. Without affecting the fixing function, it improves the strength and reliability of the overall structure, provides double protection for the stable fixing of the battery pack, and also improves the performance of the battery end plate under complex working conditions.

[0050] Based on the structural design of the terminal fixing part 17, the following implementation methods are adopted:

[0051] Firstly: such as Figure 2As shown, the terminal fixing part 17 is a nut structure welded and fixed on the second bent part 12. When the nut and the terminal screw are engaged, the contact area is large and the force is evenly distributed. Compared with a simple threaded hole, it can withstand greater tensile force and torque, effectively improving the stability of the terminal in a high-load working environment.

[0052] Secondly: such as Figure 1 As shown, the terminal fixing part 17 is a snap-fit ​​structure formed on the second bent part 12 to hold the terminal. The snap-fit ​​structure, through its unique shape design, can quickly hold and fix the terminal without the need for additional tools and connectors, achieving rapid assembly and saving assembly time and labor costs. At the same time, the snap-fit ​​structure can provide a certain buffer and protection for the terminal during the fixing process, reducing damage to the terminal during installation and extending the service life of the terminal.

[0053] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A battery end plate made of sheet metal, characterized in that, The substrate (10) includes a base plate (10), with first bent portions (11) bent along its left and right edges, and second bent portions (12) bent along its upper and lower edges. The first bent portions (11) and the second bent portions (12) are welded at opposite corners of the corresponding base plates (10) to form an enclosing structure. A reinforcing structure (20) for strengthening the base plate (10) is also welded to the area within the first bent portions (11) and the second bent portions (12) on the base plate (10). ), wherein: a reinforcing rib (13) is provided on the first bending portion (11); an inner cavity (14) is formed between the first bending portion (11) and the substrate (10); a fixing hole (15) communicating with the inner cavity (14) is provided at both ends of the second bending portion (12); and a hole reinforcement member (16) for reinforcing the fixing hole (15) is also provided in the inner cavity (14); a terminal fixing part (17) is also provided on the second bending portion (12) located at the upper edge of the substrate (10).

2. The sheet metal battery end plate according to claim 1, characterized in that, The reinforced structure (20) includes at least one cell baffle (21), which has a main body (211) and vertical portions (212) formed by bending along both sides of the main body (211), so that the cross section of the cell baffle (21) is formed into a U-shaped structure, and the cell baffle (21) is welded to the substrate (10) through the vertical portions (212).

3. A battery end plate made of sheet metal according to claim 2, characterized in that, At least two battery cell baffles (21) are provided, which are either parallel to each other or perpendicular to each other. When the two battery cell baffles (21) are set to be perpendicular to each other, the overlapping positions of the two battery cell baffles (21) are mutually accommodated by opening a first notch (213).

4. A battery end plate made of sheet metal according to any one of claims 2-3, characterized in that, The cell baffle (21) is configured to be laterally connected to the two first bends (11) at both ends, and the thickness of the cell baffle (21) is greater than the thickness of the first bends (11) so that a drop is generated between the cell baffle (21) and the first bends (11) to form a limiting part (19).

5. A battery end plate made of sheet metal according to any one of claims 2-3, characterized in that, The cell baffle (21) is configured to be laterally connected to two first bends (11) at both ends, and a second notch (111) is provided at the position where the first bend (11) connects to the cell baffle (21), and the end of the cell baffle (21) is positioned and engaged with the second notch (111).

6. A battery end plate made of sheet metal according to claim 1, characterized in that, The reinforcing rib (13) is a convex structure formed on the first bending part (11), or the reinforcing rib (13) is a snap-fit ​​structure formed by bending on the first bending part (11).

7. A battery end plate made of sheet metal according to claim 1, characterized in that, The edge of the first bend (11) is spaced apart from the substrate (10). The hole reinforcement (16) is a structure that bends and extends along the edge of the second bend (12). The hole reinforcement (16) is in normal contact with the substrate (10), or the hole reinforcement (16) overlaps with the end of the second bend (12). When the hole reinforcement (16) overlaps with the end of the second bend (12), the fixing hole (15) passes through the hole reinforcement (16).

8. A battery end plate made of sheet metal according to claim 1, characterized in that, The hole reinforcement (16) is a sheet metal part welded between the base plate (10) and the bending part, and the sheet metal part is axially offset to the fixing hole (15).

9. A battery end plate made of sheet metal according to any one of claims 7-8, characterized in that, A steel bar reinforcement (18) is also provided in the inner cavity (14). The steel bar reinforcement (18) is normally connected between the first bending part (11) and the base plate (10). The steel bar reinforcement (18) is also normally connected to the axis of the fixing hole (15). A clearance hole (181) is provided on the steel bar reinforcement (18) in the axial direction of the fixing hole (15).

10. A battery end plate made of sheet metal according to claim 1, characterized in that, The terminal fixing part (17) is a nut structure welded and fixed on the second bent part (12), or the terminal fixing part (17) is a snap-fit ​​structure formed by bending on the second bent part (12) to lock the terminal.

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