Battery cover plate assembly, battery, battery pack and vehicle

Abstract

The utility model discloses a battery cover plate assembly, battery, battery pack and vehicle, battery cover plate assembly includes: cover plate, insulator, spacing piece and sealing piece, the cover plate is equipped with the mounting hole, insulator is provided in the mounting hole, spacing piece is provided between cover plate and insulator, sealing piece is provided between cover plate and insulator, and the sealing piece is provided with the mounting hole. The sealing piece and the limiting piece are arranged on the two sides of the cover plate in the thickness direction. Therefore, the assembling mode of the insulating part, the limiting part and the sealing part on the cover plate can reduce the volume of the battery cover plate assembly, so that the occupied space of the battery cover plate assembly on the battery is reduced, the occupied space of the battery is increased, and the internal capacity of the battery is improved. According to the battery cover plate assembly, by optimizing the assembling mode among the limiting piece, the sealing piece and the insulating piece, the assembling cost of the battery cover plate assembly can be reduced, and reliable mechanical reliability and sealing performance can be provided while electrical safety is ensured, so that the overall stability and durability of the battery are improved.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a battery cover assembly, a battery, a battery pack, and a vehicle. Background Technology

[0002] In existing technology, the battery electrode structure consists of a cover plate assembly at one end, an inner spacer on the back of the cover plate assembly (the inner spacer's function is to house the tabs, preventing the tabs from contacting the casing and short-circuiting with the electrode core), and the electrode core at the bottom of the inner spacer. The inner lead is located on the back of the cover plate assembly. When welding the inner lead to the tab, it is first placed parallel to the thickness direction of the tab, the tab rests on the surface of the inner lead, and then laser welding is performed. The electrode core is connected to the cover plate assembly through the tab. After welding, the cover plate assembly is rotated from the direction parallel to the tab thickness to the direction perpendicular to the tab thickness, and then moved towards the center of the battery along its length until it mates with the end of the aluminum casing. Due to the laser welding method and the flipping of the welded cover, a large space is required; especially the space required to house the inner spacer for the tabs directly leads to the shortening of the electrode core, freeing up space for the spacer assembly. The battery cover plate assembly has a complex structure and assembly method, and occupies a significant amount of battery space. Utility Model Content

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, the first objective of the present invention is to provide a battery cover assembly that simplifies the assembly method of the battery cover assembly and enhances the safety and reliability of the battery cover assembly.

[0004] The second objective of this invention is to provide a battery comprising the battery cover assembly described in the above embodiments.

[0005] The third objective of this invention is to provide a battery pack, including the battery cover assembly or battery described in the above embodiments.

[0006] The fourth objective of this invention is to provide a vehicle that includes the battery cover assembly, battery, or battery pack described in the above embodiments.

[0007] According to a first aspect of the present invention, a battery cover assembly includes: a cover plate, an insulating member, a limiting member, and a sealing member. The cover plate has a mounting hole, the insulating member is disposed at the mounting hole, the limiting member is disposed between the cover plate and the insulating member, and the sealing member is disposed between the cover plate and the insulating member. The sealing member and the limiting member are disposed on both sides of the cover plate along the thickness direction.

[0008] According to the battery cover assembly of this utility model embodiment, the assembly method of the insulating component, limiting component, and sealing component on the cover can reduce the volume of the battery cover assembly, thereby reducing the space occupied by the battery cover assembly on the battery, increasing the usable space of the battery, and improving the internal capacity of the battery. By optimizing the assembly method between the limiting component, sealing component, and insulating component, the assembly cost of the battery cover assembly can be simplified, and reliable mechanical reliability and sealing performance can be provided while ensuring electrical safety, thereby improving the overall stability and durability of the battery.

[0009] In some embodiments, the insulating member has a groove, which is located on the side of the insulating member away from the center of the mounting hole along the thickness direction perpendicular to the cover plate. The groove extends circumferentially along the cover plate, and the sealing member and the limiting member are respectively located between the cover plate and the sidewall corresponding to the groove along the thickness direction of the cover plate.

[0010] In some embodiments, the groove includes: a first sidewall, a second sidewall, and a third sidewall, the first sidewall and the second sidewall being opposite each other along the thickness direction of the cover plate; one of the limiting member and the sealing member being disposed between the first sidewall and the side surface of the cover plate adjacent to the first sidewall; the other of the limiting member and the sealing member being disposed between the second sidewall and the side surface of the cover plate adjacent to the second sidewall; the third sidewall being disposed at one end of the first sidewall and the second sidewall adjacent to the center of the mounting hole, and the third sidewall connecting the first sidewall and the second sidewall.

[0011] In some embodiments, the projection of one of the first sidewalls and the second sidewall that contacts the seal along the thickness direction of the cover plate at least partially coincides with the projection of the cover plate.

[0012] In some embodiments, the limiting member includes: a first sub-limiting member and a second sub-limiting member, wherein the first sub-limiting member and the second sub-limiting member are disposed on one side surface of the cover plate along the thickness direction between the cover plate and the insulating member along a direction perpendicular to the thickness direction of the cover plate, and the first sub-limiting member and the second sub-limiting member are respectively connected to the cover plate; and / or, the first sub-limiting member and the second sub-limiting member are connected to each other.

[0013] In some embodiments, the sealing element includes: a first sealing section and a second sealing section, wherein the first sealing section is disposed between the cover plate and the second sidewall along the thickness direction of the cover plate; the second sealing section is connected to the first sealing section, and the second sealing section is disposed between the cover plate and the insulating element along the thickness direction perpendicular to the cover plate, and the second sealing section is connected to the first sealing section.

[0014] In some embodiments, the device further includes: a conductive connector and a tab, the conductive connector being disposed on the side of the insulating member away from the cover plate; the tab passing through the mounting hole from the end of the mounting hole away from the conductive connector and abutting against the conductive connector on the side surface of the conductive connector away from the cover plate.

[0015] In some embodiments, a limiting groove is formed on the side of the conductive connector away from the insulating member, and the limiting groove extends circumferentially along the conductive connector; the battery cover assembly further includes: a cap, the cap engaging with the limiting groove, and one end of the electrode tab that abuts against the cover plate located between the cap and the conductive connector.

[0016] In some embodiments, the conductive connector includes an extension that extends toward the center of the mounting hole along a direction perpendicular to the thickness of the cover plate, and the tab is connected to the extension.

[0017] In some embodiments, at least a portion of the extension extends toward the center of the mounting hole along the thickness direction of the cover plate, and the extension abuts against a portion of the sidewall of the insulator.

[0018] In some embodiments, the cap includes: a first connecting portion and a second connecting portion, wherein the first connecting portion is spaced apart from the conductive connector; the second connecting portion cooperates with the limiting groove, and the second connecting portion is made of the same material as the conductive connector; and / or, the first connecting portion and the second connecting portion are integrally formed parts, and the first connecting portion and the second connecting portion are made of the same material as the conductive connector.

[0019] The battery according to a second aspect embodiment of the present invention includes a battery cover assembly according to the first aspect embodiment of the present invention described above.

[0020] A battery pack according to a third aspect of the present invention includes a battery cover assembly according to the first aspect of the present invention, or a battery according to the second aspect of the present invention.

[0021] A vehicle according to a fourth aspect of the present invention includes a battery cover assembly according to the first aspect of the present invention, a battery according to the second aspect of the present invention, or a battery pack according to the third aspect of the present invention.

[0022] 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

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is an assembly diagram of one embodiment of the battery cover assembly according to the present utility model;

[0025] Figure 2 This is an exploded view of one embodiment of the battery cover assembly according to the present utility model;

[0026] Figure 3 This is a cross-sectional schematic diagram of one embodiment of the battery cover assembly according to the present utility model;

[0027] Figure 4 This is an assembly diagram of another embodiment of the battery cover assembly according to the present utility model.

[0028] Figure 5 This is an exploded view of another embodiment of the battery cover assembly according to the present utility model.

[0029] Figure 6 This is a cross-sectional schematic diagram of another embodiment of the battery cover assembly according to the present utility model;

[0030] Figure 7 This is a cross-sectional schematic diagram of one embodiment of the battery cover assembly for the negative electrode according to an embodiment of the present utility model;

[0031] Figure 8 This is a cross-sectional schematic diagram of another embodiment of the battery cover assembly for the negative electrode according to an embodiment of the present utility model.

[0032] Figure label:

[0033] 100. Battery cover assembly;

[0034] 10. Cover plate; 11. Mounting holes;

[0035] 20. Insulating component; 21. Groove; 22. First boss; 23. Second boss; 24. First sidewall; 25. Second sidewall; 26. Third sidewall;

[0036] 30. Sealing element; 31. First sealing section; 32. Second sealing section; 33. Limiting element; 331. First sub-limiting element; 332. Second sub-limiting element; 34. Conductive connector; 341. Limiting groove; 342. Extension; 35. Electrode; 351. Bending part; 36. Cap; 361. First connecting part; 362. Second connecting part;

[0037] A. Thickness direction. Detailed Implementation

[0038] The embodiments of this utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-8 A battery cover assembly 100 according to an embodiment of the present invention is described, comprising: a cover 10, an insulating member 20, a limiting member 33, and a sealing member 30. The battery cover assembly 100 has a thickness direction A.

[0039] Specifically, such as Figures 1-8 As shown, the cover plate 10 is provided with mounting holes 11, the insulating component 20 is provided at the mounting holes 11, the limiting component 33 is provided between the cover plate 10 and the insulating component 20, the sealing component 30 is provided between the cover plate 10 and the insulating component 20, and the sealing component 30 and the limiting component 33 are provided on both sides of the cover plate 10 along the thickness direction A.

[0040] Combination Figures 1-8 The cover plate 10 is a major structural component of the battery cover plate assembly 100, providing physical protection for the internal components of the battery. A mounting hole 11 is formed on the cover plate 10, extending through the cover plate 10 along its thickness direction A, for mounting other components. An insulating member 20 is inserted into the mounting hole 11 of the cover plate 10, providing excellent insulation to ensure the electrical safety of the battery. A limiting member 33 is located on the outer periphery of the insulating member 20, along the thickness direction A of the battery cover plate assembly 100, between the cover plate 10 and the insulating member 20. The main function of the limiting member 33 is to restrict the relative position between the insulating member 20 and the cover plate 10, ensuring correct assembly of the insulating member 20 and the cover plate 10, and maintaining stability during use to prevent the battery cover plate assembly 100 from loosening or shifting. The sealing element 30 is disposed on the outer periphery of the insulating element 20, along the thickness direction A of the battery cover assembly 100, and is located between the cover plate 10 and the insulating element 20. The sealing element 30 and the limiting element 33 are respectively disposed on both sides of the cover plate 10 along the thickness direction A of the battery cover assembly 100. The sealing element 30 mainly functions to seal, preventing water, dust, and other substances from the external environment from entering the battery and damaging it, while also preventing leakage of internal battery materials, thus ensuring the safety and reliability of the battery.

[0041] According to the battery cover assembly 100 of this utility model embodiment, the assembly method of the insulating member 20, the limiting member 33, and the sealing member 30 on the cover 10 can reduce the volume of the battery cover assembly 100, thereby reducing the space occupied by the battery cover assembly 100 on the battery, increasing the usable space of the battery, and increasing the internal capacity of the battery. By optimizing the assembly method between the limiting member 33, the sealing member 30, and the insulating member 20, the assembly cost of the battery cover assembly 100 can be simplified, and reliable mechanical reliability and sealing performance can be provided while ensuring electrical safety, thereby improving the overall stability and durability of the battery.

[0042] According to some embodiments of this utility model, such as Figures 1-6 As shown, the insulating member 20 has a groove 21. The groove 21 is located on the side of the insulating member 20 away from the center of the mounting hole 11 along the thickness direction A of the cover plate 10. The groove 21 extends circumferentially along the cover plate 10. The sealing member 30 and the limiting member 33 are respectively located between the cover plate 10 and the corresponding side wall of the groove 21 along the thickness direction A of the cover plate 10.

[0043] A groove 21 is formed on the outer peripheral side of the insulating member 20. The groove 21 is formed by recessing at least a portion of the surface of the outer peripheral sidewall of the insulating member 20 along the thickness direction A perpendicular to the cover plate 10 toward the center of the insulating member 20, and the groove 21 extends circumferentially along the insulating member 20. A first boss 22 and a second boss 23 are respectively provided at both ends of the insulating member 20 along the thickness direction A. The first boss 22 and the second boss 23 extend circumferentially along the insulating member 20, and the groove 21 is located between the first boss 22 and the second boss 23 along the thickness direction A. The sealing member 30 and the limiting member 33 are embedded in the groove 21, and the sealing member 30 and the limiting member 33 are respectively located between the first boss 22 and the cover plate 10 and the second boss 23 and the cover plate 10 along the thickness direction A of the cover plate 10.

[0044] Therefore, the sealing element 30 is embedded in the groove 21 to prevent external environmental factors from entering the battery and to prevent leakage of internal battery materials. The limiting element 33 is also embedded in the groove 21 to limit the relative position between the insulating element 20 and the cover plate 10, ensuring the structural stability of the assembled insulating element 20 and cover plate 10. The groove 21 facilitates the assembly of the insulating element 20 and the cover plate 10, and also improves the assembly and positioning accuracy of the sealing element 30 and the limiting element 33, simplifying the assembly process while ensuring the sealing performance of the battery cover assembly 100.

[0045] According to some embodiments of this utility model, such as Figures 1-6 As shown, the groove 21 includes: a first sidewall 24, a second sidewall 25, and a third sidewall 26. The first sidewall 24 and the second sidewall 25 are opposite each other along the thickness direction A of the cover plate 10. One of the limiting member 33 and the sealing member 30 is disposed between the first sidewall 24 and the side surface of the cover plate 10 adjacent to the first sidewall 24, and the other of the limiting member 33 and the sealing member 30 is disposed between the second sidewall 25 and the side surface of the cover plate 10 adjacent to the second sidewall 25. The third sidewall 26 is disposed at one end of the first sidewall 24 and the second sidewall 25 near the center of the mounting hole 11, and the third sidewall 26 connects the first sidewall 24 and the second sidewall 25.

[0046] The first sidewall 24 is the surface of the first boss 22 adjacent to the second boss 23 along the thickness direction A of the cover plate 10; the second sidewall 25 is the surface of the second boss 23 along the thickness direction A of the cover plate 10; and the third sidewall 26 is the surface of the groove 21 opposite to the inner wall of the mounting hole 11 of the cover plate 10 along the thickness direction A perpendicular to the cover plate 10. In some embodiments, along the thickness direction A of the cover plate 10, the limiting member 33 is located between the first sidewall 24 and the surface of the cover plate 10 adjacent to the first sidewall 24, and the sealing member 30 is disposed between the second sidewall 25 and the surface of the cover plate 10 adjacent to the second sidewall 25. The limiting member 33 and the sealing member 30 are arranged around the third sidewall 26. In some embodiments, along the thickness direction A of the cover plate 10, the sealing member 30 is located between the first sidewall 24 and the side surface of the cover plate 10 adjacent to the first sidewall 24, and the limiting member 33 is disposed between the second sidewall 25 and the side surface of the cover plate 10 adjacent to the second sidewall 25. The limiting member 33 and the sealing member 30 are disposed around the third sidewall 26.

[0047] Therefore, by placing the seal 30 and the limiting member 33 between different side walls and the cover plate 10, better sealing and positioning effects can be achieved. The separate arrangement of the seal 30 and the limiting member 33 reduces mutual interference between them, allowing the seal 30 and the limiting member 33 to be embedded into the groove 21 from both ends of the insulating member 20, simplifying the assembly process of the battery cover plate assembly 100 and improving production efficiency.

[0048] According to some embodiments of this utility model, such as Figure 3 and Figure 6 As shown, the projection of one of the first sidewalls 24 and the second sidewall 25 that contacts the seal 30 along the thickness direction A of the cover plate 10 at least partially coincides with the projection of the cover plate 10.

[0049] Along the thickness direction A of the cover plate 10, at least a portion of the projection of the first sidewall 24 and the second sidewall 25 that contacts the seal 30 covers the projection range of the cover plate 10. Taking the first sidewall 24 contacting the seal 30 as an example, the projection of the mounting hole 11 of the cover plate 10 in the thickness direction A is located within the projection of the first sidewall 24 in the thickness direction A of the cover plate 10. Therefore, the corresponding projection of the second sidewall 25 in the thickness direction A is also located within the projection of the mounting hole 11 in the thickness direction A of the cover plate 10. This facilitates the passage of the end of the insulating member 20 containing the second sidewall 25 through the mounting hole 11, enabling the assembly of the insulating member 20 with the cover plate 10. The end of the insulating member 20 containing the first sidewall 24, together with the limiting member 33, serves a limiting function to prevent the insulating member 20 from falling out of the mounting hole 11. Conversely, the same applies when the second sidewall 25 contacts the seal 30.

[0050] Therefore, the projection of the first sidewall 24 and the second sidewall 25 that contacts the seal 30 along the thickness direction A of the cover plate 10 at least partially coincides with the projection of the cover plate 10, which facilitates the assembly of the insulating member 20 with the mounting hole 11 and can also improve the assembly stability of the insulating member 20 and the cover plate 10.

[0051] According to some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the limiting member 33 includes: a first sub-limiting member 331 and a second sub-limiting member 332. The first sub-limiting member 331 and the second sub-limiting member 332 are disposed on one side surface of the cover plate 10 along the thickness direction A and between the cover plate 10 and the insulating member 20 along the thickness direction A perpendicular to the cover plate 10. The first sub-limiting member 331 and the second sub-limiting member 332 are respectively connected to the cover plate 10; and / or, the first sub-limiting member 331 and the second sub-limiting member 332 are connected to each other.

[0052] The first sub-limiting member 331 and the second sub-limiting member 332 are disposed around the third sidewall 26 of the insulating member 20. The inner sidewall contours of the first sub-limiting member 331 and the second sub-limiting member 332 along the thickness direction A of the cover plate 10 are adapted to the contour of the third sidewall 26 of the insulating member 20, facilitating the engagement of the first sub-limiting member 331 and the second sub-limiting member 332 with the insulating member 20. In some embodiments, the first sub-limiting member 331 and the second sub-limiting member 332 are in contact with one side surface of the cover plate 10 along the thickness direction A, ensuring that they will not shift or loosen during use. Alternatively, the ends of the first sub-limiting member 331 and the second sub-limiting member 332 are connected to each other to form a complete limiting structure, providing stronger mechanical stability. Alternatively, the first sub-limiting member 331 is connected to the second sub-limiting member 332, and the first sub-limiting member 331 and the second sub-limiting member 332 are in contact with the side surface of the cover plate 10 along the thickness direction A.

[0053] Therefore, by dividing the limiting member 33 into two sub-limiting members 33 and connecting them respectively to the cover plate 10 or to each other, the relative position between the insulating member 20 and the cover plate 10 can be more precisely limited, ensuring the stability of the assembly during use. Dividing the limiting member 33 into two sub-limiting members 33 facilitates the independent installation of each sub-limiting member 33. The connection between the first sub-limiting member 331 and the second sub-limiting member 332 can be completed after the first sub-limiting member 331 and the second sub-limiting member 332 are assembled with the insulating member 20, which reduces the assembly difficulty of the limiting member 33 and improves production efficiency. The connection between the first sub-limiting member 331 and the second sub-limiting member 332 can form a more robust overall structure, enhancing the limiting member 33's ability to resist external pressure.

[0054] According to some embodiments of this utility model, such as Figure 3 and Figure 6 As shown, the sealing element 30 includes: a first sealing section 31 and a second sealing section 32. The first sealing section 31 is disposed between the cover plate 10 and the second side wall 25 along the thickness direction A of the cover plate 10. The second sealing section 32 is connected to the first sealing section 31 and is disposed between the cover plate 10 and the insulating element 20 along the thickness direction A perpendicular to the cover plate 10. The second sealing section 32 is connected to the first sealing section 31.

[0055] Taking the sealing element 30 disposed between the cover plate 10 and the second side wall 25 along the thickness direction A of the cover plate 10 as an example, the first sealing segment 31 is disposed between the second side wall 25 and the side surface of the cover plate 10 adjacent to the second side wall 25 along the thickness direction A, and the first sealing segment 31 contacts and abuts against at least a portion of the surfaces of the second side wall 25 and the cover plate 10. The second sealing segment 32 is disposed between the inner wall of the mounting hole 11 of the cover plate 10 and the third side wall 26 of the insulating element 20 along the thickness direction A perpendicular to the cover plate 10, and the second sealing segment 32 contacts at least a portion of the inner wall of the mounting hole 11 and the third side wall 26. The first sealing segment 31 and the second sealing segment 32 are connected to form the sealing element 30. The sealing element 30 has a certain degree of elasticity, and the first sealing segment 31 and the second sealing segment 32 can be formed by the deformation of the sealing element 30 under the force between the cover plate 10 and the insulating element 20.

[0056] Thus, the first sealing section 31 and the second sealing section 32 can achieve sealing in different directions, effectively filling the gap between the cover plate 10 and the insulating component 20. The first sealing section 31 and the second sealing section 32 together constitute a complete sealing component 30, ensuring an all-round sealing effect and ensuring the sealing reliability of the battery cover plate assembly 100 during long-term use.

[0057] According to some embodiments of this utility model, such as Figure 3 and Figure 6 As shown, it also includes: a conductive connector 34 and a tab 35. The conductive connector 34 is disposed on the side of the insulating member 20 away from the cover plate 10. The tab 35 passes through the mounting hole 11 away from the conductive connector 34 and abuts against the surface of the conductive connector 34 away from the cover plate 10.

[0058] Both the conductive connector 34 and the insulating member 20 have through holes extending through the conductive connector 34 and the insulating member 20 along the thickness direction A of the cover plate 10, and the through holes of the conductive connector 34 and the insulating member 20 are connected. The tab 35 has a bent portion 351, which is formed by bending one end of the tab 35 along the thickness direction A perpendicular to the cover plate 10. One side surface of the bent portion 351 along the thickness direction A of the cover plate 10 contacts and abuts against one side surface of the conductive connector 34 along the thickness direction A of the cover plate 10. In some embodiments, the bent portion 351 is formed by first passing one end of the tab 35 through the through hole away from the conductive connector 34, and then bending it again along the thickness direction A perpendicular to the cover plate 10. In some embodiments, one end of the tab 35 is first bent along the thickness direction A perpendicular to the cover plate 10 to form the bent portion 351, and then passes through the through hole. The connection between one side surface of the bent portion 351 of the tab 35 and the side surface of the conductive connector 34 away from the cover plate 10 can be a welding connection. The way in which the tab 35 passes through the cover plate 10 and abuts against the conductive connector 34 can prevent foreign objects generated during the welding of the tab 35 and the conductive connector 34 from falling into the battery, reducing the risk of internal short circuits and improving battery safety.

[0059] Therefore, the tab 35 connects to the battery cell inside the battery, providing an electrical connection between the internal cell and the external circuit. The tab 35 serves as a current transmission path, conducting the current from the cell to the external circuit. The tab 35 passes through the mounting hole 11 and abuts against the conductive connector 34, ensuring a secure mechanical fixation and preventing loosening or displacement. This ensures tight contact between the tab 35 and the conductive connector 34, providing a reliable electrical connection. The through-hole design on the insulating member 20 and the conductive connector 34 facilitates the assembly of the tab 35, simplifying the assembly process. The direct contact between the tab 35 and the conductive connector 34 reduces the need for structures such as the limiting member 33 or the sealing member 30. The limiting of the tab 35 is achieved through the cooperation between the bent portion 351 and the conductive connector 34, saving on the assembly cost of the battery cover assembly 100.

[0060] According to some embodiments of this utility model, such as Figures 1-8 As shown, a limiting groove 341 is formed on the side of the conductive connector 34 away from the insulating member 20, and the limiting groove 341 extends circumferentially along the conductive connector 34; the battery cover assembly 100 also includes: a cap 36, which cooperates with the limiting groove 341, and one end of the tab 35 that abuts against the cover 10 is located between the cap 36 and the conductive connector 34.

[0061] A limiting groove 341 is recessed into at least a portion of the surface of the conductive connector 34 away from the insulating member 20 along the thickness direction A, facing the side where the insulating member 20 is located. The limiting groove 341 extends circumferentially along the conductive connector 34 and is located at the outer periphery of the conductive connector 34. A cap 36 is located on the side of the conductive connector 34 away from the insulating member 20. A limiting protrusion adapted to the limiting groove 341 is formed on the surface of the cap 36 adjacent to the conductive connector 34. The limiting protrusion extends circumferentially along the cover plate 10 and is located at the outer periphery of the cover plate 10. The limiting protrusion abuts against the inner wall surface of the limiting groove 341. The bent portion 351 of the tab 35 is located between the cap 36 and the conductive connector 34 along the thickness direction A of the cover plate 10. In some embodiments, the limiting groove 341 penetrates the conductive connector 34 along the thickness of the conductive connector 34 to facilitate welding of the cap 36 to the conductive connector 34.

[0062] Therefore, the formation of the upper limit groove 341 of the conductive connector 34 facilitates its cooperation with the cap 36. Through the cooperation with the limit groove 341, the cap 36 firmly fixes the tab 35 between the conductive connector 34 and the cap 36, preventing the tab 35 from loosening or shifting. The cap 36 can also provide additional mechanical protection to prevent the external environment from affecting the tab 35 and the conductive connector 34, thereby improving the structural stability of the battery cover assembly 100 and extending the battery's service life.

[0063] According to some embodiments of this utility model, such as Figure 3 and Figure 6 As shown, the conductive connector 34 includes an extension 342, which extends along the thickness direction A of the cover plate 10 toward the center of the mounting hole 11, and the tab 35 is connected to the extension 342.

[0064] The extension 342 extends toward the center of the mounting hole 11 along the thickness direction A perpendicular to the cover plate 10. The extension 342 provides additional contact points so that the tab 35 can be more securely connected to the conductive connector 34.

[0065] Therefore, the extension 342 can increase the contact area between the tab 35 and the conductive connector 34, improve the efficiency of electrical transmission, and increase the stability and reliability of the connection between the tab 35 and the conductive connector 34.

[0066] According to some embodiments of the present invention, as shown in the figures Figure 6 As shown, at least a portion of the extension 342 extends toward the center of the mounting hole 11 along the thickness direction A of the cover plate 10, and the extension 342 abuts against a portion of the sidewall of the insulating member 20.

[0067] An insulator 20 has a through hole, and the extension 342 abuts against a portion of the sidewall of the through hole in the insulator 20. By abutting against the sidewall of the insulator 20, the extension 342 can provide an additional support point, increasing the mechanical stability of the conductive connector 34 and enhancing the overall structural stability and assembly reliability of the conductive connector 34.

[0068] According to some embodiments of this utility model, such as Figure 3 and Figure 6 As shown, the cap 36 includes: a first connecting portion 361 and a second connecting portion 362, the first connecting portion 361 being spaced apart from the conductive connector 34; the second connecting portion 362 cooperating with the limiting groove 341, the second connecting portion 362 being made of the same material as the conductive connector 34; and / or, the first connecting portion 361 and the second connecting portion 362 being integrally formed, the first connecting portion 361 and the second connecting portion 362 being made of the same material as the conductive connector 34.

[0069] Along the thickness direction A of the cover plate 10 towards the side where the cover plate 10 is located, a first connecting portion 361 and a second connecting portion 362 are sequentially arranged, and the second connecting portion 362 is engaged with the limiting groove 341 of the conductive connector 34. In some embodiments, the first connecting portion 361 and the second connecting portion 362 of the cap 36 located at the positive terminal of the battery are made of the same material, and both the first connecting portion 361 and the second connecting portion 362 can be made of copper. The first connecting portion 361 and the second connecting portion 362 of the cap 36 located at the negative terminal of the battery are made of different materials, and the first connecting portion 361 can be made of copper, while the second connecting portion 362 can be made of aluminum.

[0070] Therefore, both the second connecting part 362 and the conductive connector 34 are made of copper. For the positive electrode cap 36, the first connecting part 361 and the second connecting part 362 use the same copper material, ensuring good conductivity and stable current transmission to the positive electrode. In this case, the first connecting part 361 and the second connecting part 362 can be integrally molded, which enhances the overall structural strength of the cap 36, reduces the manufacturing difficulty, and improves the production efficiency. For the negative electrode cap 36, the first connecting part 361 is made of copper, and the second connecting part 362 is made of aluminum. This ensures good conductivity while reducing the risk of electrochemical corrosion and lowering production costs.

[0071] Specifically, the battery cover assembly 100 is assembled as follows:

[0072] Combination Figure 3One end face of the insulating component 20 along the thickness direction A is first brazed to the conductive connector 34. The sealing component 30 is then fitted onto the insulating component 20, making contact between the sealing component 30 and the first sidewall 24 of the insulating component 20. Pressure is applied to the end of the insulating component 20 containing the first sidewall 24, causing the end of the insulating component 20 containing the second sidewall 25 to pass through the through hole along the thickness direction A from the side of the cover plate 10 near the battery center to the side of the cover plate 10 away from the battery center, thus abutting the sealing component 30 against the surface of the cover plate 10 near the battery center. The end of the insulating component 20 containing the second sidewall 25 is then positioned higher than the cover plate 10. The first limiting component 33 and the second limiting component 33 are then respectively inserted from both sides of the insulating component 20 between the second sidewall 25 of the insulating component 20 and the surface of the cover plate 10 away from the battery center. After the first limiting component 33 and the second limiting component 33 are in place, the pressure on the insulating component 20 is released, completing the assembly of the battery cover plate assembly 100. The first limiting member 33 and the second limiting member 33 can be welded to the cover plate 10, or the mating ends of the first limiting member 33 and the second limiting member 33 can be welded together to prevent the limiting member 33 from loosening.

[0073] Or, combine Figure 6 The sealing element 30 is fitted onto the insulating element 20, making the sealing element 30 contact the second sidewall 25 of the insulating element 20. Pressure is applied to one end of the second sidewall 25 of the insulating element 20, causing that end of the insulating element 20 to pass through the through hole along the thickness direction A from the side of the cover plate 10 away from the battery center to the side of the cover plate 10 near the battery center, so that the sealing element 30 abuts against the surface of the cover plate 10 away from the battery center. The end of the insulating element 20 with the second sidewall 25 is lower than the cover plate 10. Then, the first limiting member 33 and the second limiting member 33 are respectively inserted from both sides of the insulating element 20 between the second sidewall 25 of the insulating element 20 and the surface of the cover plate 10 near the battery center. After the first limiting member 33 and the second limiting member 33 are installed in place, the pressure on the insulating element 20 is released, completing the assembly of the battery cover plate assembly 100. The first limiting member 33 and the second limiting member 33 can be welded to the cover plate 10, or the mating ends of the first limiting member 33 and the second limiting member 33 can be welded together to prevent the limiting member 33 from loosening.

[0074] Then, the tab 35 is passed through the through hole between the insulator 20 and the conductive connector 34, and the end of the conductive connector 34 is bent at 90° to form a bent portion 351. The bent portion 351 overlaps with the surface of the conductive connector 34, and the tab 35 and the conductive connector 34 are connected as one unit by welding. After the tab 35 and the conductive connector 34 are welded together, the limiting protrusion of the cap 36 is fitted with the limiting groove 341 of the conductive connector 34, and the contact surfaces of the two are connected and sealed by welding, so that the tab 35 is sealed inside the battery cover assembly 100, completing the battery assembly.

[0075] The battery according to a second aspect of the present invention includes the battery cover assembly 100 according to the first aspect of the present invention described above.

[0076] According to the battery of the present invention, by applying the battery cover assembly 100 in the above embodiment, the battery assembly method can be simplified, the reliability and safety of the battery can be improved, the internal space utilization of the battery can be increased, and the battery service life can be extended.

[0077] A battery pack according to a third aspect of the present invention includes a battery cover assembly 100 according to the first aspect of the present invention, or a battery according to the second aspect of the present invention.

[0078] According to the battery pack of the present invention, by applying the battery cover assembly 100 or battery in the above embodiments, the assembly cost of the battery pack can be reduced, the overall performance of the battery pack can be improved, the reliability and safety of the battery pack can be enhanced, the electrical performance can be optimized, and the service life of the battery pack can be extended.

[0079] A vehicle according to a fourth aspect of the present invention includes a battery cover assembly 100 according to the first aspect of the present invention, a battery according to the second aspect of the present invention, or a battery pack according to the third aspect of the present invention.

[0080] The vehicle according to the present invention can improve the overall safety and reliability of the vehicle by applying the battery cover assembly 100, battery or battery pack in the above embodiments.

[0081] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0082] In the description of this utility model, "first feature" and "second feature" may include one or more of the features. In the description of this utility model, "multiple" means two or more. In the description of this utility model, "above" or "below" the second feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. In the description of this utility model, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0083] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0084] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery cover assembly (100), characterized in that, include: Cover plate (10), the cover plate (10) is provided with mounting holes (11); An insulating element (20) is provided at the mounting hole (11); A limiting member (33) is provided between the cover plate (10) and the insulating member (20); A sealing element (30) is disposed between the cover plate (10) and the insulating element (20), and the sealing element (30) and the limiting element (33) are disposed on both sides of the cover plate (10) along the thickness direction.

2. The battery cover assembly (100) according to claim 1, characterized in that, The insulating member (20) has a groove (21) formed thereon. The groove (21) is located on the side of the insulating member (20) away from the center of the mounting hole (11) along the thickness direction perpendicular to the cover plate (10). The groove (21) extends circumferentially along the cover plate (10). The sealing member (30) and the limiting member (33) are respectively located between the cover plate (10) and the side wall corresponding to the groove (21) along the thickness direction of the cover plate (10).

3. The battery cover assembly (100) according to claim 2, characterized in that, The groove (21) includes: A first sidewall (24) and a second sidewall (25) are opposite each other along the thickness direction of the cover plate (10). One of the limiting member (33) and the sealing member (30) is disposed between the first sidewall (24) and the side surface of the cover plate (10) adjacent to the first sidewall (24), and the other of the limiting member (33) and the sealing member (30) is disposed between the second sidewall (25) and the side surface of the cover plate (10) adjacent to the second sidewall (25). The third sidewall (26) is located at one end of the first sidewall (24) and the second sidewall (25) near the center of the mounting hole (11), and the third sidewall (26) connects the first sidewall (24) and the second sidewall (25).

4. The battery cover assembly (100) according to claim 3, characterized in that, The projection of one of the first sidewalls (24) and the second sidewall (25) that contacts the seal (30) along the thickness direction of the cover plate (10) at least partially coincides with the projection of the cover plate (10).

5. The battery cover assembly (100) according to claim 4, characterized in that, The limiting member (33) includes: First sub-limiting component (331); The second sub-limiting member (332) and the first sub-limiting member (331) and the second sub-limiting member (332) are disposed on one side surface of the cover plate (10) along the thickness direction, perpendicular to the thickness direction of the cover plate (10), between the cover plate (10) and the insulating member (20). The first sub-limiting member (331) and the second sub-limiting member (332) are respectively connected to the cover plate (10); and / or, The first sub-limiting member (331) and the second sub-limiting member (332) are connected to each other.

6. The battery cover assembly (100) according to claim 3, characterized in that, The seal (30) includes: The first sealing section (31) is disposed between the cover plate (10) and the second side wall (25) along the thickness direction of the cover plate (10); The second sealing section (32) is connected to the first sealing section (31). The second sealing section (32) is disposed between the cover plate (10) and the insulating member (20) along the thickness direction perpendicular to the cover plate (10). The second sealing section (32) is connected to the first sealing section (31).

7. The battery cover assembly (100) according to claim 1, characterized in that, Also includes: A conductive connector (34) is provided on the side of the insulating member (20) away from the cover plate (10); The tab (35) extends from the mounting hole (11) away from the conductive connector (34) through the mounting hole (11) and the conductive connector (34) and abuts against the side surface of the conductive connector (34) away from the cover plate (10).

8. The battery cover assembly (100) according to claim 7, characterized in that, The conductive connector (34) has a limiting groove (341) formed on the side away from the insulating member (20), and the limiting groove (341) extends circumferentially along the conductive connector (34). The battery cover assembly (100) further includes a cap (36), which cooperates with the limiting groove (341), and the end of the tab (35) that abuts against the cover (10) is located between the cap (36) and the conductive connector (34).

9. The battery cover assembly (100) according to claim 7, characterized in that, The conductive connector (34) includes an extension (342) that extends toward the center of the mounting hole (11) along a direction perpendicular to the thickness of the cover plate (10), and the tab (35) is connected to the extension (342).

10. The battery cover assembly (100) according to claim 9, characterized in that, At least a portion of the extension (342) extends toward the center of the mounting hole (11) along the thickness direction of the cover plate (10), and the extension (342) abuts against a portion of the sidewall of the insulator (20).

11. The battery cover assembly (100) according to claim 8, characterized in that, The cap (36) includes: The first connecting part (361) is spaced apart from the conductive connector (34); The second connecting part (362) cooperates with the limiting groove (341), and the second connecting part (362) is made of the same material as the conductive connector (34); and / or, The first connecting part (361) and the second connecting part (362) are integrally formed parts, and the first connecting part (361) and the second connecting part (362) are made of the same material as the conductive connector (34).

12. A battery, characterized in that, Includes the battery cover assembly (100) according to any one of claims 1-11.

13. A battery pack, characterized in that, Includes the battery cover assembly (100) according to any one of claims 1-11, or the battery according to claim 12.

14. A vehicle, characterized in that, Includes the battery cover assembly (100) according to any one of claims 1-11, or the battery according to claim 12, or the battery pack according to claim 13.

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