Battery cover plate, cover plate module and cylindrical battery

Abstract

The utility model relates to the technical field of batteries, in particular to a battery cover plate, a cover plate module and a cylindrical battery, the battery cover plate is provided with a sealing piece, a top cover and a limiting piece, the top cover is attached to the sealing piece, the top cover is provided with a circular mounting port, the sealing piece is provided with a circular penetrating port, and the limiting piece is arranged on the top cover. When the pole and the battery cover plate are assembled, the pole of the battery can be connected with the limiting piece and penetrates through the circular mounting port and the circular penetration port, and the mounting port and the penetration port are of circular structures, so that the battery cover plate can be assembled with the pole in any direction, and the direction of the battery cover plate does not need to be adjusted in the assembling process; convenience is provided for assembly of the electromagnetic cover plate and the pole, the pole is connected with the limiting piece, the limiting piece can be fixed, and therefore the limiting piece limits rotation of the top cover, and welding of the top cover is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery cover plate, a cover plate module and a cylindrical battery. Background Art

[0002] Power batteries are the development direction of new energy vehicles and energy storage power stations, so the safety of batteries is of crucial importance. As an important part of power batteries, the battery cover plate determines the sealing performance and insulation performance of power batteries.

[0003] For example, a novel cover plate insulation sealing structure of a lithium battery disclosed in a patent document with the publication number of CN206849878U includes a cover plate body and a pole column. A square groove is provided in the middle part of the cover plate body, and the pole column is adaptively installed in the square groove through a square column head.

[0004] The existing battery cover plate can be adapted to the assembly with a square pole column through a square groove, but the cover plate needs to be in a specific direction or position to be assembled with the pole column, which causes inconvenience to the assembly of the cover plate and the pole column. Summary of the Utility Model

[0005] In view of this, it is necessary to provide a battery cover plate, a cover plate module and a cylindrical battery to solve the technical problem that the battery cover plate in the prior art needs to be installed with the pole column in a specific direction, which causes inconvenience to the assembly of the cover plate and the pole column.

[0006] To achieve the above technical purpose, the technical solution of the utility model provides a battery cover plate, including:

[0007] A seal, provided with a circular through-hole for the pole column to pass through;

[0008] A top cover, attached to the seal, the top cover being provided with a circular mounting hole for the pole column to pass through;

[0009] A limiting member, installed on the top cover for connecting with the pole column to limit the relative rotation of the top cover with respect to the pole column.

[0010] In some embodiments, the limiting member includes an annular limiting portion and a sealing portion. The annular limiting portion is attached to the top cover and located on the periphery of the circular mounting hole, and the sealing portion is connected to the annular limiting portion and attached to the inner wall of the circular mounting hole.

[0011] In some embodiments, the top cover is provided with a limiting hole, and a limiting protrusion is provided on the side of the annular limiting portion close to the top cover. The limiting protrusion is inserted into the limiting hole.

[0012] In some embodiments, the annular limiting portion is provided with a mounting groove for installing the pole column.

[0013] In some embodiments, the battery cover plate further includes a sealing ring, the sealing ring is located inside the circular through hole, one side of the sealing ring close to the top cover is attached to the top cover and the sealing part, and the inner side of the sealing ring is used to attach to the pole post.

[0014] In some embodiments, the battery cover plate further includes a sealing nail, the top cover is provided with a liquid injection port, and the sealing nail is inserted into the liquid injection port.

[0015] In some embodiments, the battery cover plate further includes an explosion-proof valve, the top cover is further provided with an explosion-proof port, and the explosion-proof valve is installed in the explosion-proof port.

[0016] The technical solution of the present utility model further provides a cover plate module, including a pole post and the battery cover plate as described above. One end of the pole post is connected to the limiting member, and the other end of the pole post sequentially passes through the circular mounting hole and the circular through hole.

[0017] In some embodiments, a locking portion is provided at one end of the pole post close to the sealing member, and the locking portion is attached to a side of the sealing member away from the top cover.

[0018] The technical solution of the present utility model further provides a cylindrical battery, including the cover plate module as described above.

[0019] Compared with the prior art, the beneficial effects of the battery cover plate, the cover plate module and the cylindrical battery of the present utility model include: The battery cover plate is provided with a sealing member, a top cover and a limiting member. The top cover is attached to the sealing member. The top cover is provided with a circular mounting hole, and the sealing member is provided with a circular through hole. The limiting member is installed on the top cover. With the above structure of the battery cover plate, when assembling the pole post and the battery cover plate, the pole post of the battery can be connected to the limiting member and passed through the circular mounting hole and the circular through hole. Since both the mounting hole and the through hole are circular structures, the battery cover plate can be assembled with the pole post in any direction. During the assembly process, there is no need to specifically adjust the direction of the battery cover plate, which provides convenience for the assembly of the electromagnetic cover plate and the pole post. The pole post is connected to the limiting member, and the limiting member can be fixed, so that the limiting member restricts the rotation of the top cover, avoids the rotation of the top cover during the welding process, and thus facilitates the welding of the top cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a top view of the cover plate module provided by an embodiment of the present utility model;

[0021] Figure 2 is the Figure 1 sectional view taken along line A-A in

[0022] Among them, the reference numerals in the drawings are as follows:

[0023] 10 - Sealing member 11 - Circular through hole 12 - Sealing edge

[0024] 20 - Top cover 21 - Circular mounting opening 22 - Welding ring

[0025] 23 - Limit hole 24 - Liquid injection port 25 - Explosion-proof port

[0026] 30 - Limiting part 31 - Annular limiting part 32 - Sealing part

[0027] 40 - Sealing ring 50 - Supply pole column 311 - Mounting groove

[0028] 312 - Limiting protrusion. Detailed implementation mode

[0029] The following will specifically describe the preferred embodiments of the present invention in conjunction with the accompanying drawings. Among them, the drawings form a part of this application and are used together with the embodiments of the present invention to explain the principle of the present invention, and are not used to limit the scope of the present invention.

[0030] An embodiment of the present invention provides a battery cover plate, as Figure 2 shown, including a sealing member 10, a top cover 20 and a limiting member 30. The sealing member 10 is provided with a circular through-hole 11 for the pole column 50 to pass through; the top cover 20 is attached to the sealing member 10, and the top cover 20 is provided with a circular mounting opening 21 for the pole column to pass through, and the circular mounting opening 21 is located on one side of the circular through-hole 11; the limiting member 30 is installed on the top cover 20 for connecting with the pole column and restricting the rotation of the top cover 20 relative to the pole column 50.

[0031] Specifically, by providing the sealing member 10, the top cover 20 and the limiting member 30 in the battery cover plate, the top cover 20 is attached to the sealing member 10. The top cover 20 is provided with a circular mounting opening 21, and the sealing member 10 is provided with a circular through-hole 11. The circular mounting opening 21 is located on one side of the circular through-hole 11. The limiting member 30 is installed on the top cover 20. With the above structure of the battery cover plate, when assembling the pole column and the battery cover plate, the pole column of the battery can be connected to the limiting member 30 and passed through the circular mounting opening 21 and the circular through-hole 11. Since both the mounting opening and the through-hole are circular structures, the battery cover plate can be assembled with the pole column in any direction. During the assembly process, there is no need to specifically adjust the direction of the battery cover plate, which provides convenience for the assembly of the electromagnetic cover plate and the pole column. The pole column can be fixed by connecting to the limiting member 30, so that the limiting member 30 restricts the rotation of the top cover 20, avoiding the rotation of the top cover 20 during the welding process, and thus facilitating the welding of the top cover 20.

[0032] In this embodiment, the sealing member 10 is a plastic part. A sealing edge 12 is provided in the circumferential direction of the sealing member 10. The sealing member 10 is assembled at the end opening of the battery housing, and the sealing edge 12 is attached to the inner wall of the end opening to seal the battery housing.

[0033] In this embodiment, as Figure 2 shown, a welding ring 22 is provided on the outer circumferential direction of the top cover 20. The lower side of the cover plate is inserted into the end opening of the battery case. The welding ring 22 is in contact with the end face of the battery case. After the assembly of the seal 10 and the top cover 20 is completed, the welding ring 22 is welded to the battery case, and the assembly of the battery cover plate can be completed.

[0034] It can be understood that the limiting member 30 can be any limiting structure with one end limited to the top cover 20 and the other end fixedly connected to the pole post, and only needs to be able to limit the rotation of the top cover 20 by connecting the pole post.

[0035] In one of the embodiments, as Figure 2 shown, the limiting member 30 includes an annular limiting portion 31 and a sealing portion 32. The annular limiting portion 31 is in contact with the top cover 20 and is located on the periphery of the circular mounting opening 21. The sealing portion 32 is connected to the annular limiting portion 31 and is in contact with the inner wall of the circular mounting opening 21. Specifically, when connecting the limiting member 30 to the top cover 20, the limiting member 30 is inserted into the circular mounting opening 21 of the top cover 20 through the sealing portion 32, and by being in contact with the inner wall of the central mounting opening, while sealing the pole post and the side wall of the central mounting opening, it can also limit the radial movement of the top cover 20.

[0036] It can be understood that the limiting member 30 can limit the rotation of the top cover 20 by pressing the annular limiting portion 31 against the top cover 20 or by screwing the sealing portion 32 into the circular mounting opening 21.

[0037] In one of the embodiments, the sealing portion 32 is threadedly connected to the side wall of the central mounting opening.

[0038] In one of the embodiments, as Figure 1-2 shown, the annular limiting portion 31 is provided with a mounting groove 311 for mounting the pole post 50. Specifically, when assembling the pole post and the battery cover plate, the upper end of the pole post is assembled into the mounting groove 311, and the lower end of the pole post sequentially passes through the circular mounting opening 21 and the circular through hole 11; the upper end of the pole post is assembled into the mounting groove 311, which can limit the rotation of the limiting member 30 relative to the pole post, and further enables the limiting member 30 to limit the rotation of the top cover 20.

[0039] In one of the embodiments, as Figure 2 shown, the top cover 20 is provided with a limiting hole 23, and a limiting protrusion 312 is provided on the surface of the annular limiting portion 31 close to the top cover 20. The limiting protrusion 312 is inserted into the limiting hole 23. Specifically, the limiting member 30 only needs to cooperate with the limiting protrusion 312 on the annular limiting portion 31 and the limiting hole 23 to limit the rotation of the top cover 20.

[0040] It can be understood that the terminal post can limit the rotation of the limiting member 30 relative to the terminal post by friction with the side wall of the installation groove 311 or by snap connection with the side wall of the installation groove 311.

[0041] In some embodiments, as Figure 2 shown, the battery cover plate further includes a sealing ring 40. The sealing ring 40 is located inside the circular through hole. One side of the sealing ring 40 close to the top cover 20 is attached to the top cover 20 and the sealing portion 32. The inner side of the sealing ring 40 is used to fit the terminal post. Specifically, the sealing ring 40 is attached to the top cover 20 and the sealing portion 32 through the side close to the cover, which can effectively seal the circular through hole 11.

[0042] In some embodiments, as Figure 1-2 shown, the battery cover plate further includes a sealing nail. The top cover 20 is provided with a liquid injection port 24, and the sealing nail is inserted into the liquid injection port 24. Specifically, the liquid injection port 24 can supply electrolyte to be injected into the battery interior, and the sealing nail can seal the liquid injection port 24.

[0043] In some embodiments, as Figure 1-2 shown, the battery cover plate further includes an explosion-proof valve. The top cover 20 is further provided with an explosion-proof port 25, and the explosion-proof valve is installed in the explosion-proof port 25. Specifically, the explosion-proof valve can ensure the safety of the battery during operation.

[0044] An embodiment of the present utility model further provides a cover plate module, including a terminal post and the battery cover plate described above. One end of the terminal post is connected to the limiting member 30, and the other end of the terminal post sequentially passes through the circular installation opening 21 and the circular through hole 11. Specifically, by providing the battery cover plate in the cover plate module, during the assembly process of the terminal post and the battery cover plate, there is no need to adjust the angle of the battery cover plate during the assembly process, which provides convenience for the assembly of the terminal post and the battery cover plate.

[0045] In this embodiment, when assembling the terminal post and the battery cover plate, the upper end of the terminal post is installed in the installation groove 311 of the limiting member 30. The lower end of the terminal post sequentially passes through the circular installation opening 21 and the circular through hole 11. Then, the sealing ring 40 is sleeved on the lower end of the terminal post, and then the lower end of the terminal post is riveted to the bottom side of the sealing member 10 to limit the terminal post and restrict the rotation of the terminal post, and finally complete the assembly of the cover plate module.

[0046] In some embodiments, as Figure 2 shown, a locking portion is provided at one end of the terminal post close to the sealing member 10, and the locking portion is attached to the side of the sealing member 10 away from the top cover 20. Specifically, through the attachment of the locking portion to the top cover 20, the locking of the limiting member 30 and the top cover 20 can be effectively realized.

[0047] An embodiment of the present utility model further provides a cylindrical battery, including the cover plate module described above. Specifically, by providing the cover plate module in the cylindrical battery, it provides convenience for the assembly of the cylindrical battery.

[0048] In this embodiment, the cylindrical battery includes a positive cover module and a negative cover module, and the positive cover module and the negative cover module are respectively located at the upper and lower ends of the cylindrical battery.

[0049] In this embodiment, when assembling the positive cover module or the negative cover module, first assemble the cover module. During the assembly of the cover module, assemble the seal 10, the top cover 20, and the limit from bottom to top, then fix the upper end of the terminal post to the installation groove 311, sequentially pass through the circular installation opening 21 and the circular through-hole 11, then sleeved the sealing ring 40 on the lower end of the terminal post, and then rivet the lower end of the terminal post to the bottom side of the seal 10 to complete the assembly of the positive cover module or the negative cover module; then assemble the assembled positive cover module or negative cover module to the upper and lower openings of the battery housing, so that the sealing edge 12 of the seal 10 fits the end faces of the upper and lower openings, and then weld the top cover 20 to the battery housing through the sealing edge 12, and the assembly of the cylindrical battery can be realized, which provides convenience for the assembly of the cylindrical battery.

[0050] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A battery cover plate, characterized in that, Comprising: A seal provided with a circular through-hole for a pole post to pass through; A top cover that fits with the seal, the top cover being provided with a circular mounting hole for the pole post to pass through; A limiting member installed on the top cover for connecting with the pole post to limit the relative rotation of the top cover with respect to the pole post; The limiting member includes an annular limiting portion and a sealing portion. The annular limiting portion is in contact with the top cover and is located on the circumference of the circular mounting hole. The sealing portion is connected to the annular limiting portion and is in contact with the inner wall of the circular mounting hole.

2. The battery cover plate according to claim 1, characterized in that, The top cover is provided with a limiting hole. A limiting protrusion is provided on the side of the annular limiting portion close to the top cover, and the limiting protrusion is inserted into the limiting hole.

3. The battery cover plate according to claim 2, characterized in that, The annular limiting portion is provided with a mounting groove for mounting the pole post.

4. The battery cover plate according to claim 1, characterized in that The battery cover further includes a sealing ring. The sealing ring is located inside the circular through-hole. The side of the sealing ring close to the top cover is in contact with the top cover and the sealing portion, and the inner side of the sealing ring is for contacting the pole post.

5. The battery cover plate according to any one of claims 1-4, characterized in that The battery cover further includes a sealing nail. The top cover is provided with a liquid injection port, and the sealing nail is inserted into the liquid injection port.

6. The battery cover plate according to any one of claims 1-4, characterized in that, The battery cover further includes an explosion-proof valve. The top cover is further provided with an explosion-proof port, and the explosion-proof valve is installed in the explosion-proof port.

7. A cover plate module, characterized in that, Comprising a pole post and the battery cover according to any one of claims 1-6. One end of the pole post is connected to the limiting member, and the other end of the pole post sequentially passes through the circular mounting hole and the circular through-hole.

8. The cover plate module according to claim 7, wherein, One end of the pole post close to the seal is provided with a locking portion, and the locking portion is in contact with the side of the seal away from the top cover.

9. A cylindrical battery, characterized in that, Comprising the cover module according to claim 7 or 8.

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