Battery cover plate with riveting structure

Abstract

The utility model particularly discloses a battery cover plate with a riveting structure, which comprises a riveting block, an upper plastic, a top cover sheet, a lower plastic and a pole which are sequentially arranged from top to bottom, and the pole is formed by bending a thin plate. According to the utility model, the pole is formed by bending the thin plate, so that the total consumption of copper materials is greatly reduced, and the production cost is effectively reduced; meanwhile, a circular through hole is formed in the center of the pole, and a circular truncated cone matched with the circular through hole is arranged at the lower end of the riveting block, so that relative displacement of the riveting block and the upper pressing plate can be effectively prevented, the compression amount of the sealing ring is stable, and the air tightness of the battery structure is further ensured; moreover, the pole, the upper plastic and the riveting block are all arranged to be in a rectangular rotation stopping shape with a fillet structure, the stability of connection between components can be guaranteed, fool-proof difference oblique angles are arranged in the containing groove of the upper plastic and the first groove of the top cover piece, installation of the riveting block and the upper plastic is greatly facilitated, and the installation efficiency is improved. And the installation efficiency of operators is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery cover plate with a riveted structure. Background Art

[0002] At present, the main assembly processes for the cover plate pole area of ​​lithium battery structural parts are injection molding, welding and riveting. Among them, the riveting process has the lowest initial investment and equipment cost, and the least production difficulty.

[0003] The riveted assembly parts are composed of poles, sealing rings, lower plastic, top cover, upper plastic, and riveted blocks. Among them, the poles have the highest component cost, especially the negative pole, which is a copper-aluminum composite pole that uses more copper, resulting in the pole accounting for a relatively high proportion of the cost of all battery cover components. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a riveted structure battery cover, including a riveted block, an upper plastic, a top cover sheet, a lower plastic and a pole arranged in sequence from top to bottom, wherein:

[0005] A top cover sheet, wherein a first through hole is provided in the middle of the top cover sheet, a first groove is provided on the upper side of the top cover sheet, the first groove is provided on two opposite sides of the first through hole, and a second through hole is provided in each of the first grooves, and an explosion-proof sheet is fixed on the lower side of the top cover sheet, and the explosion-proof sheet corresponds to the first through hole;

[0006] The upper plastic includes the positive electrode upper plastic and the negative electrode upper plastic, and the positive electrode upper plastic and the negative electrode upper plastic are respectively clamped in the two first grooves;

[0007] The lower plastic is fixedly connected to the top cover sheet, and a third through hole matching the second through hole is provided on the lower plastic.

[0008] The poles include a positive pole and a negative pole formed by bending a thin plate, and a sealing ring is provided on the positive pole and the negative pole;

[0009] The riveted blocks include a positive riveted block and a negative riveted block. The positive riveted block is clamped in the positive upper plastic, and the positive pole passes through the lower plastic, the top cover sheet and the positive upper plastic to be connected to the positive riveted block. The negative riveted block is clamped in the negative upper plastic, and the negative pole passes through the lower plastic, the top cover sheet and the negative upper plastic to be connected to the negative riveted block.

[0010] Preferably, the middle of the positive pole and the negative pole are provided with pole through holes, and the lower ends of the positive riveted block and the negative riveted block are provided with a frustum matching with the pole through holes and placed in the pole through holes.

[0011] Preferably, the upper side surfaces of the positive electrode upper plastic and the negative electrode upper plastic are both provided with a receiving groove for mounting the positive electrode riveting block and the negative electrode riveting block, and a fourth through hole is opened in the receiving groove.

[0012] Preferably, both the accommodating groove and the first groove are provided with fool-proof differential bevels.

[0013] Preferably, a third groove matching the first groove is provided on the lower side of the top cover sheet, a first protrusion matching the third groove is provided on the lower plastic, and the third through hole is located in the middle of the first protrusion.

[0014] Preferably, a protective film for protecting the explosion-proof disk is provided on the first through hole.

[0015] Preferably, the pole, upper plastic and riveting block are all rectangular anti-rotation structures.

[0016] Preferably, the outer sides of the pole, the upper plastic and the riveting block are all configured with rounded corners.

[0017] Compared with the prior art, the utility model provides a riveted structure battery cover, in which the pole in the battery cover is formed by bending a thin plate, so that the total amount of copper material used is greatly reduced, thereby reducing the total cost of the cover component; at the same time, by arranging a circular through hole in the center of the pole and arranging a truncated cone matching the circular through hole at the lower end of the rivet block, the relative displacement of the rivet block and the upper pressure plate in the up and down directions can be effectively prevented, so that the compression amount of the sealing ring remains stable, further ensuring the air tightness of the battery structure; moreover, the pole, the upper plastic and the rivet block are all arranged in a rectangular anti-rotation shape with a rounded corner structure, which can ensure the stability of the connection between the components, and the anti-foolproof differential angles are arranged in the accommodating groove of the upper plastic and in the first groove of the top cover sheet, which greatly facilitates the installation of the rivet block and the upper plastic, and improves the installation efficiency of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural explosion diagram of a riveted battery cover in the utility model.

[0019] Figure 2 It is a schematic diagram of the structure of the plastic on the positive electrode or the plastic on the negative electrode in the utility model.

[0020] Figure 3 It is a schematic diagram of the structure of the top cover sheet in the utility model.

[0021] Figure 4 It is a structural schematic diagram of the lower plastic in the utility model.

[0022] In the figure: 11. positive electrode riveting block, 12. negative electrode riveting block, 21. positive electrode upper plastic, 22. negative electrode upper plastic, 23. receiving groove, 24. fourth through hole, 3. top cover sheet, 31. first through hole, 32. first groove, 33. second through hole, 35. protective film, 4. lower plastic, 41. second groove, 42. explosion-proof sheet, 43. third through hole, 44. first protrusion, 51. positive electrode column, 52. negative electrode column, 6. sealing ring, 7. electrode column through hole, 8. frustum, 9. foolproof difference bevel. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0024] It should be noted that, in this embodiment, the "first", "second" and "third" only represent different components and have no order of precedence. Figure 1 For example, the vertical paper surface upwards is the front, the vertical paper surface downwards is the back, the vertical paper surface to the left is the left, the vertical paper surface to the right is the right, the vertical paper surface inwards is the down, the vertical paper surface outwards is the up, the left and right direction is the horizontal direction, and the front and back direction is the vertical direction.

[0025] like Figure 1-Figure 4 As shown, a riveted structure battery cover plate includes a riveted block, an upper plastic, a top cover sheet 3, a lower plastic 4 and a pole arranged in sequence from top to bottom, wherein:

[0026] A top cover sheet 3, wherein a first through hole 31 is provided in the middle of the top cover sheet 3, a first groove 32 is provided on the upper side of the top cover sheet 3, the first groove 32 is provided on two opposite sides of the first through hole 31, and a second through hole 33 is provided in each of the first grooves 32, and an explosion-proof sheet 42 is fixed on the lower side of the top cover sheet 3, and the explosion-proof sheet 42 corresponds to the first through hole 31;

[0027] The upper plastic includes a positive electrode upper plastic 21 and a negative electrode upper plastic 22, and the positive electrode upper plastic 21 and the negative electrode upper plastic 22 are respectively clamped in the two first grooves 32;

[0028] The lower plastic 4 is fixedly connected to the top cover sheet 3, and the lower plastic 4 is provided with a third through hole 43 matching the second through hole 33.

[0029] The poles include a positive pole 51 and a negative pole 52 formed by bending a thin plate, and a sealing ring 6 is provided on the positive pole 51 and the negative pole 52;

[0030] The riveting blocks include a positive riveting block 11 and a negative riveting block 12. The positive riveting block 11 is clamped in the positive upper plastic 21, and the positive pole 51 passes through the lower plastic 4, the top cover sheet 3 and the positive upper plastic 21 to be connected to the positive riveting block 11. The negative riveting block 12 is clamped in the negative upper plastic 22, and the negative pole 52 passes through the lower plastic 4, the top cover sheet 3 and the negative upper plastic 22 to be connected to the negative riveting block 12.

[0031] In this embodiment, the pole, upper plastic and riveted block are all rectangular anti-rotation structures, and the outer sides of the pole, upper plastic and riveted block are all rounded. The first through hole 31 is provided with a protective film 35 for protecting the explosion-proof disc 42. The explosion-proof disc 42 and the top cover sheet 3 are fixed by laser welding. A second groove 41 is also provided on the upper side of the lower plastic 4. The second groove 41 can avoid interference with the explosion-proof disc 42 caused by processing errors. Based on the above settings, the stability of the components after connection can be guaranteed, and the friction between the components can be effectively reduced, thereby extending the service life of the components.

[0032] In this embodiment, the use of a pole formed by bending a thin plate can effectively reduce the total amount of copper material used, thereby reducing the total cost of the cover plate component.

[0033] like Figure 1 As shown, the middle of the positive pole 51 and the negative pole 52 are both provided with pole through holes 7, and the lower ends of the positive riveting block 11 and the negative riveting block 12 are both provided with a frustum 8 that matches the pole through holes 7 and is placed in the pole through holes 7.

[0034] In this embodiment, by providing a pole through hole 7 and a truncated cone 8 matching the pole through hole 7, the truncated cone 8 can be installed in the pole through hole 7 after riveting, thereby ensuring that the riveted block is stably installed in the corresponding pole, preventing relative displacement of the riveted block and the upper pressure plate in the up and down directions, thereby keeping the compression amount of the sealing ring 6 stable, and ensuring the air tightness of the battery cover structure.

[0035] like Figure 2 As shown, the upper side surfaces of the positive electrode upper plastic 21 and the negative electrode upper plastic 22 are provided with a receiving groove 23 for installing the positive electrode rivet block 11 and the negative electrode rivet block 12, and a fourth through hole 24 is opened in the receiving groove 23. The receiving groove 23 and the first groove 32 are both provided with an anti-fool difference bevel 9.

[0036] In this embodiment, by providing a receiving groove 23 on the upper plastic that matches the corresponding rivet block, the operator can easily place the rivet block in the receiving groove 23 of the corresponding upper plastic. At the same time, by providing an anti-foolproof difference angle 9 in the receiving groove 23, the operator can quickly identify the installation direction of the rivet block, thereby effectively improving the installation efficiency. Similarly, by providing an anti-foolproof difference angle 9 in the first groove 32, the installation direction of the upper plastic that matches the anti-foolproof difference angle 9 can be quickly identified.

[0037] like Figure 1 , Figure 4 As shown, the lower side of the top cover sheet 3 is provided with a third groove (not shown in the figure) matching the first groove 32 , the lower plastic 4 is provided with a first protrusion 44 matching the third groove, and the third through hole 43 is located in the middle of the first protrusion 44 .

[0038] In this embodiment, the third groove and the first protrusion 44 are provided, and then based on the matching of the third groove and the first protrusion 44, a guiding effect is played on the fixed connection between the top cover sheet 3 and the lower plastic 4, thereby effectively improving the installation efficiency.

[0039] In this embodiment, the sealing ring 6 is sleeved on the upper side of the pole, passes through the third through hole 43 and is placed in the third groove to abut against the lower side of the top cover sheet 3, and sealing is achieved by squeezing between the top cover sheet 3 and the pole.

[0040] The above is a detailed introduction to a riveted battery cover provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A riveted battery cover, characterized in that: It comprises a riveting block, an upper plastic, a top cover sheet (3), a lower plastic (4) and a pole which are arranged in sequence from top to bottom, wherein: A top cover sheet (3), wherein a first through hole (31) is provided in the middle of the top cover sheet (3), a first groove (32) is provided on the upper side of the top cover sheet (3), the first groove (32) is provided on two opposite sides of the first through hole (31), and a second through hole (33) is provided in each of the first grooves (32), and an explosion-proof sheet (42) is fixed on the lower side of the top cover sheet (3), and the explosion-proof sheet (42) corresponds to the first through hole (31); The upper plastic includes a positive electrode upper plastic (21) and a negative electrode upper plastic (22), wherein the positive electrode upper plastic (21) and the negative electrode upper plastic (22) are respectively clamped in two first grooves (32); The lower plastic (4) is fixedly connected to the top cover sheet (3), and the lower plastic (4) is provided with a third through hole (43) matching the second through hole (33). The poles include a positive pole (51) and a negative pole (52) formed by bending a thin plate, and a sealing ring (6) is provided on both the positive pole (51) and the negative pole (52); The riveting block comprises a positive riveting block (11) and a negative riveting block (12); the positive riveting block (11) is clamped in the positive upper plastic (21), and the positive pole (51) passes through the lower plastic (4), the top cover sheet (3) and the positive upper plastic (21) to be connected to the positive riveting block (11); the negative riveting block (12) is clamped in the negative upper plastic (22), and the negative pole (52) passes through the lower plastic (4), the top cover sheet (3) and the negative upper plastic (22) to be connected to the negative riveting block (12).

2. The riveted structure battery cover plate according to claim 1, characterized in that: The middle of the positive pole (51) and the negative pole (52) are both provided with pole through holes (7), and the lower ends of the positive riveted block (11) and the negative riveted block (12) are both provided with round tables (8) that match the pole through holes (7) and are placed in the pole through holes (7).

3. The riveted structure battery cover plate according to claim 1, characterized in that: The upper side surfaces of the positive electrode upper plastic (21) and the negative electrode upper plastic (22) are both provided with a receiving groove (23) for mounting the positive electrode riveting block (11) and the negative electrode riveting block (12), and a fourth through hole (24) is provided in the receiving groove (23).

4. The riveted structure battery cover plate according to claim 3, characterized in that: The accommodation groove (23) and the first groove (32) are both provided with foolproof differential bevel angles (9).

5. The riveted structure battery cover plate according to claim 1, characterized in that: The lower side of the top cover sheet (3) is provided with a third groove matching the first groove (32), the lower plastic (4) is provided with a first protrusion (44) matching the third groove, and the third through hole (43) is located in the middle of the first protrusion (44).

6. The riveted structure battery cover plate according to claim 1, characterized in that: A protective film (35) for protecting the explosion-proof disk (42) is provided on the first through hole (31).

7. The riveted structure battery cover plate according to claim 1, characterized in that: The pole, upper plastic and riveting block are all rectangular anti-rotation structures.

8. The riveted structure battery cover plate according to claim 1, characterized in that: The outer sides of the pole, the upper plastic and the riveting block are all arranged with rounded corners.

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