CN219801081U

CN219801081U - Battery cover plate structure and battery core

Info

Publication number: CN219801081U
Application number: CN202320641229.8U
Authority: CN
Inventors: 李巧英; 赵芬芬; 张雷; 赵赫; 黄利明
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2023-03-28
Filing date: 2023-03-28
Publication date: 2023-10-03
Anticipated expiration: 2033-03-28

Abstract

The utility model relates to the technical field of battery structures, and discloses a battery cover plate structure and an electric core. The explosion-proof valve relies on the connecting piece to be fixed in the explosion-proof hole, avoids the poor risk of sealing that the defect that the welding is poor brought, improves explosion-proof hole's sealing reliability, reduces the quantity of equipment accessory simultaneously, improves packaging efficiency, reduction in manufacturing cost.

Description

Battery cover plate structure and battery core

Technical Field

The utility model relates to the technical field of battery structures, in particular to a battery cover plate structure and an electric core.

Background

After the traditional aluminum shell cylindrical battery cathode adopts plastic injection molding, the traditional aluminum shell cylindrical battery cathode is fixedly connected with an explosion-proof valve through a laser welding process, and the battery core applying the structural cover plate has the following defects:

1. the possibility of poor laser welding effect exists, and poor tightness between the explosion-proof valve and the upper plastic is easily caused;

2. the production and installation steps are more, parts are relatively more, so that the assembly production efficiency of the cover plate is lower, and the assembly production bottleneck process of the battery cell structural part is formed.

Therefore, a battery cover structure and a battery cell are needed to solve the above-mentioned technical problems.

Disclosure of Invention

Based on the above, the utility model aims to provide a battery cover plate structure and a battery core, wherein an explosion-proof valve is fixed in an explosion-proof hole by a connecting piece, so that the risk of poor sealing caused by the defect of poor welding is avoided, the sealing reliability of the explosion-proof hole is improved, the number of assembled accessories is reduced, the assembly efficiency is improved, and the manufacturing cost is reduced.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the battery cover plate structure comprises a top cover plate, an upper connecting piece, a pole and an explosion-proof valve, wherein a first yielding hole and an explosion-proof hole penetrating through the upper surface and the lower surface of the top cover plate are formed in the top cover plate, the upper connecting piece penetrates through the first yielding hole, a pole hole penetrating through the upper surface and the lower surface of the upper connecting piece is formed in the upper connecting piece, the pole penetrates through the pole hole, the explosion-proof valve is arranged in the explosion-proof hole, and the upper connecting piece and the explosion-proof valve are integrally formed.

As an alternative technical scheme of the battery cover plate structure, the upper connecting piece and the explosion-proof valve are made of plastic materials.

As an optional technical scheme of the battery cover plate structure, the upper connecting piece and the explosion-proof valve are integrally formed through an injection molding process.

As an optional technical scheme of battery cover plate structure, be equipped with the intercommunication groove between the hole of stepping down with the explosion-proof hole, the intercommunication groove respectively with the hole of stepping down with explosion-proof hole intercommunication.

As an optional technical scheme of battery cover plate structure, explosion-proof hole with both ends about one of explosion-proof valve all are equipped with sealed step, explosion-proof hole with both ends about the other of explosion-proof valve all are provided with sealed flange corresponding, sealed flange with sealed step one-to-one cooperation.

As an optional technical scheme of battery cover plate structure, battery cover plate structure still includes down the connecting piece, down the connecting piece connect in go up the lower surface of connecting piece, be equipped with the second hole of stepping down on the connecting piece down, the utmost point post with go up the connecting piece is all worn to locate the second hole of stepping down, down the connecting piece be used for the insulation the top cap piece.

As an optional technical scheme of the battery cover plate structure, one of the lower end of the upper connecting piece and the lower connecting piece is provided with a positioning column, the other one of the lower end of the upper connecting piece and the lower connecting piece is provided with a positioning groove, and the positioning column is spliced with the positioning groove.

As an optional technical scheme of the battery cover plate structure, the number of the positioning columns and the number of the positioning grooves are at least two.

As an optional technical scheme of the battery cover plate structure, the positioning columns and the positioning grooves are uniformly distributed around the central axis of the second abdication hole at intervals.

As an optional technical scheme of the battery cover plate structure, the upper connecting piece is provided with a positioning groove, and the positioning groove is communicated with the second yielding hole.

As an alternative technical scheme of the battery cover plate structure, the lower connecting piece is made of plastic materials; and/or

The upper connecting piece is fixedly connected with the lower connecting piece through ultrasonic welding.

As an optional technical scheme of battery cover plate structure, the position of lower connecting piece corresponding to explosion-proof hole is provided with the spacing groove, the spacing groove holds and spacing the lower extreme of explosion-proof valve.

As an optional technical scheme of the battery cover plate structure, the limiting groove is internally provided with an air vent, and the air vent penetrates through the upper surface and the lower surface of the lower connecting piece.

As an alternative technical scheme of the battery cover plate structure, the lower connecting piece is connected with the top cover piece in a plugging manner.

As an optional technical scheme of the battery cover plate structure, one of the bottoms of the lower connecting piece and the top cover piece is provided with a plug-in column, the other one of the bottoms of the lower connecting piece and the top cover piece is provided with a plug-in groove, and the plug-in columns are inserted into the plug-in grooves in a one-to-one correspondence manner.

As an optional technical scheme of the battery cover plate structure, the top cover plate is made of plastic, and the top cover plate is formed in the integral structure of the upper connecting piece and the explosion-proof valve through injection molding.

As an optional technical scheme of the battery cover plate structure, the pole comprises an upper connecting portion and a lower connecting portion, and the upper connecting portion and the lower connecting portion are connected from top to bottom.

In a second aspect, an electrical core is provided, including the battery cover structure described above.

The beneficial effects of the utility model are as follows:

the battery cover plate structure provided by the utility model comprises the top cover plate, the upper connecting piece, the pole column and the explosion-proof valve, wherein the upper connecting piece is used for fixing the pole column in the pole column hole, the explosion-proof hole is formed in the top cover plate, the explosion-proof valve is arranged in the explosion-proof hole in a sealing way, the upper connecting piece and the explosion-proof valve are integrally formed, the explosion-proof valve can be fixed in the explosion-proof hole by depending on the upper connecting piece without being fixed through welding processes such as laser welding, the risk of poor sealing caused by the defect of poor welding is avoided, the sealing reliability of the explosion-proof hole is improved, the number of assembled accessories is reduced, the assembly efficiency is improved, and the manufacturing cost is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

Fig. 1 is an exploded view of a battery cover structure according to a first embodiment of the present utility model;

fig. 2 is a cross-sectional view of a battery cover structure according to an embodiment of the present utility model.

In the figure:

1. a top cover sheet; 11. a first relief hole; 12. explosion-proof holes; 13. a communication groove; 14. a sealing step; 2. an upper connecting piece; 21. a post hole; 22. positioning columns; 3. a pole; 31. an upper connection part; 32. a lower connecting part; 4. an explosion-proof valve; 41. a sealing flange; 5. a lower connecting piece; 51. a second relief hole; 52. a limit groove; 53. an air guide hole; 54. a positioning groove; 55. a plug-in column; 6. a confluence plate.

Detailed Description

In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

The embodiment provides a battery cell, and the battery cell includes a battery cell body and a battery cover plate structure arranged at the top of the battery cell body, and as shown in fig. 1 and 2, the battery cover plate structure includes a top cover plate 1, an upper connecting piece 2, a pole 3, a lower connecting piece 5, an explosion-proof valve 4 and a confluence disc 6. The top cover plate 1 is provided with a first abdication hole 11 penetrating through the upper surface and the lower surface of the top cover plate, the upper connecting piece 2 is penetrated through the first abdication hole 11, the upper connecting piece 2 is provided with a pole hole 21 penetrating through the upper surface and the lower surface of the upper connecting piece 2, and the pole 3 is penetrated through the pole hole 21; the lower connecting piece 5 is connected to the lower surface of the top cover piece 1, a second abdication hole 51 is formed in the lower connecting piece 5, the pole 3 and the upper connecting piece 2 are both arranged in the second abdication hole 51 in a penetrating mode, and the lower connecting piece 5 is used for insulating the top cover piece 1; the connecting piece is also provided with explosion-proof holes 12 penetrating through the upper surface and the lower surface of the connecting piece, the explosion-proof valve 4 is arranged in the explosion-proof holes 12, the explosion-proof valve 4 can seal and block the explosion-proof holes 12, when the pressure inside the battery core exceeds a threshold value, the explosion-proof valve 4 is opened, and two ends of the explosion-proof holes 12 are communicated; one side of the lower connecting piece 5, which is away from the top cover plate 1, is provided with a containing space, and the bus plate 6 is arranged in the containing space, and the bus plate 6 is electrically connected with the pole 3.

Further, as shown in fig. 1 and 2, the upper connector 2 is configured as a sleeve-shaped structure, the upper connector 2 and the inner wall of the first abdicating hole 11 are configured in a sealing manner, the explosion-proof valve 4 is configured as a disc-shaped structure, the peripheral portion of the explosion-proof valve is configured in a sealing manner with the explosion-proof hole 12, and the upper connector 2 and the explosion-proof valve 4 are integrally formed.

Specifically, the battery cover plate structure that this embodiment provided includes top cap piece 1, go up connecting piece 2, utmost point post 3 and explosion-proof valve 4, go up connecting piece 2 and be fixed in utmost point post hole 21 with utmost point post 3, be equipped with explosion-proof hole 12 on the top cap piece 1, explosion-proof valve 4 seals and sets up in explosion-proof hole 12, go up connecting piece 2 and explosion-proof valve 4 integrated into one piece, explosion-proof valve 4 can rely on connecting piece 2 to be fixed in explosion-proof hole 12 in, need not to be fixed through welding processes such as laser welding, the risk of poor seal that the defect that has avoided welding failure brought is improved the sealing reliability of explosion-proof hole 12, reduce the quantity of equipment accessory simultaneously, improve packaging efficiency, reduce manufacturing cost.

The upper connecting piece 2 and the explosion-proof valve 4 are made of plastic materials, have good corrosion resistance and insulating property, are waterproof and durable, and are light in weight, low in cost and convenient to mold and process.

The upper connecting piece 2 and the explosion-proof valve 4 are integrally formed through an injection molding process, so that the production efficiency is high, products with various shapes and sizes can be formed, the product size is accurate, and the explosion-proof valve is suitable for mass production and products with complex shapes.

Illustratively, a communication groove 13 is disposed between the first relief hole 11 and the explosion-proof hole 12, the communication groove 13 is respectively communicated with the first relief hole 11 and the explosion-proof hole 12, and a connection portion between the upper connecting piece 2 and the explosion-proof valve 4 is accommodated in the communication groove 13.

As shown in fig. 1 and 2, sealing steps 14 are respectively arranged at the upper end and the lower end of the explosion-proof hole 12, sealing flanges 41 are respectively arranged at the upper end and the lower end of the explosion-proof valve 4 correspondingly, and the sealing flanges 41 are matched with the sealing steps 14 in a one-to-one correspondence manner so as to further improve the tightness between the explosion-proof valve 4 and the explosion-proof hole 12.

In other embodiments of the present utility model, the sealing steps 14 may be disposed at the upper and lower ends of the explosion-proof valve 4, and the sealing steps 14 may be disposed at the upper and lower ends of the explosion-proof hole 12, which may also serve to improve the tightness between the explosion-proof valve 4 and the explosion-proof hole 12.

Illustratively, the lower end of the upper connecting piece 2 is provided with a positioning column 22, the positioning column 22 is arranged on the periphery of the upper connecting piece 2 body, the lower connecting piece 5 is provided with a positioning groove 54, and the positioning column 22 is spliced with the positioning groove 54 to limit the installation angle of the upper connecting piece 2 in the horizontal plane and ensure the installation accuracy of the explosion-proof valve 4.

Illustratively, the positioning groove 54 is disposed at a peripheral portion of the second relief hole 51, and the positioning groove 54 is communicated with the second relief hole 51 for processing and molding.

In other embodiments of the present utility model, the positioning post 22 may be disposed on the lower connector 5, and the positioning groove 54 may be formed on a structure of the lower connector 5 protruding toward the periphery, which also can limit the installation angle of the upper connector 2 and ensure the installation accuracy of the explosion-proof valve 4.

Illustratively, as shown in fig. 1, the number of the positioning posts 22 and the positioning grooves 54 is at least two, so as to improve the reliability of defining the installation angle of the upper connector 2, and serve as an auxiliary installation function. Specifically, the number of positioning posts 22 and positioning slots 54 may be two, three, four, etc.

Illustratively, the locating posts 22 and locating slots 54 are evenly spaced about the central axis of the second relief hole 51.

As shown in fig. 1, the position of the lower connecting piece 5 corresponding to the explosion-proof hole 12 is further provided with a limit groove 52, the lower end structure of the explosion-proof valve 4 is matched with the limit groove 52, and the limit groove 52 can accommodate and limit the lower end of the explosion-proof valve 4, so as to improve the reliability of the cooperation limit between the lower connecting piece 5 and the explosion-proof valve 4.

As shown in fig. 1, a plurality of air holes 53 are formed in the limiting groove 52, the air holes 53 penetrate through the upper surface and the lower surface of the lower connecting piece 5, and the air holes 53 are used for realizing the functions of air guiding and pressure relief.

The lower connecting piece 5 is made of plastic materials, has good corrosion resistance and insulation property, and the upper connecting piece 2 and the lower connecting piece 5 are fixedly connected through ultrasonic welding, so that connecting materials and structures such as bolts, nails, buckles, welding materials or adhesives are not needed, assembly steps are simplified, and production efficiency is improved.

The lower connection piece 5 is connected to the roof plate 1 by means of a plug connection. Specifically, as shown in fig. 1, the lower connector 5 is provided with two plugging posts 55, and the bottom of the top cover sheet 1 is correspondingly provided with two plugging slots (not shown in the figure), and the plugging posts 55 are inserted into the plugging slots in a one-to-one correspondence manner, so as to realize connection between the lower connector 5 and the top cover sheet 1.

Of course, in other embodiments of the present utility model, the plug posts 55 may be disposed at the bottom of the top cover sheet 1, and the plug slots may be disposed at the lower connector 5, so as to achieve a plug-in fit between the lower connector 5 and the top cover sheet 1.

Illustratively, the pole 3 includes an upper connection portion 31 and a lower connection portion 32, and the upper connection portion 31 and the lower connection portion 32 are connected from top to bottom.

Illustratively, the busbar disc 6 is made of a metal material such as copper or nickel.

Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims

1. The battery cover plate structure is characterized by comprising a top cover plate (1), an upper connecting piece (2), a pole column (3) and an explosion-proof valve (4), wherein a first abdicating hole (11) and an explosion-proof hole (12) penetrating through the upper surface and the lower surface of the top cover plate are formed in the top cover plate (1), the upper connecting piece (2) is arranged in the first abdicating hole (11) in a penetrating mode, a pole column hole (21) penetrating through the upper surface and the lower surface of the upper connecting piece (2) is formed in the upper connecting piece (2), the pole column (3) is arranged in the pole column hole (21) in a penetrating mode, the explosion-proof valve (4) is arranged in the explosion-proof hole (12), and the upper connecting piece (2) and the explosion-proof valve (4) are formed in an integrated mode.

2. The battery cover plate structure according to claim 1, wherein the upper connector (2) and the explosion-proof valve (4) are both made of plastic materials.

3. The battery cover plate structure according to claim 2, wherein the upper connector (2) and the explosion-proof valve (4) are integrally formed through an injection molding process.

4. The battery cover plate structure according to claim 1, wherein a communication groove (13) is arranged between the first relief hole (11) and the explosion-proof hole (12), and the communication groove (13) is respectively communicated with the first relief hole (11) and the explosion-proof hole (12).

5. The battery cover plate structure according to claim 1, wherein sealing steps (14) are respectively arranged at the upper end and the lower end of one of the explosion-proof holes (12) and the explosion-proof valves (4), sealing flanges (41) are respectively arranged at the upper end and the lower end of the other of the explosion-proof holes (12) and the explosion-proof valves (4) in a corresponding manner, and the sealing flanges (41) are in one-to-one correspondence with the sealing steps (14).

6. The battery cover plate structure according to any one of claims 1-5, further comprising a lower connecting member (5), wherein the lower connecting member (5) is connected to the lower surface of the upper connecting member (2), a second yielding hole (51) is formed in the lower connecting member (5), the pole (3) and the upper connecting member (2) are both arranged in the second yielding hole (51) in a penetrating manner, and the lower connecting member (5) is used for insulating the top cover sheet (1).

7. The battery cover plate structure according to claim 6, wherein one of the lower end of the upper connecting piece (2) and the lower connecting piece (5) is provided with a positioning column (22), the other of the lower end of the upper connecting piece (2) and the lower connecting piece (5) is provided with a positioning groove (54), and the positioning column (22) is spliced with the positioning groove (54).

8. The battery cover structure according to claim 7, wherein the number of the positioning posts (22) and the positioning grooves (54) is at least two.

9. The battery cover plate structure according to claim 8, wherein the positioning posts (22) and the positioning grooves (54) are uniformly distributed at intervals around the central axis of the second relief hole (51).

10. The battery cover plate structure according to claim 7, wherein the upper connecting member (2) is provided with a positioning groove (54), and the positioning groove (54) is communicated with the second relief hole (51).

11. The battery cover plate structure according to claim 6, characterized in that the lower connecting member (5) is made of plastic material; and/or

The upper connecting piece (2) is fixedly connected with the lower connecting piece (5) through ultrasonic welding.

12. The battery cover plate structure according to claim 6, wherein the lower connecting member (5) is provided with a limit groove (52) at a position corresponding to the explosion-proof hole (12), and the limit groove (52) accommodates and limits the lower end of the explosion-proof valve (4).

13. The battery cover plate structure according to claim 12, wherein air holes (53) are provided in the limiting grooves (52), and the air holes (53) penetrate through the upper and lower surfaces of the lower connecting piece (5).

14. Battery cover plate structure according to claim 6, characterized in that the lower connection piece (5) is plug-connected with the top cover sheet (1).

15. The battery cover plate structure according to claim 14, wherein one of the lower connector (5) and the bottom of the top cover sheet (1) is provided with a plug-in post (55), the other of the lower connector (5) and the bottom of the top cover sheet (1) is provided with a plug-in groove, and the plug-in posts (55) are inserted into the plug-in grooves in a one-to-one correspondence.

16. The battery cover plate structure according to any one of claims 1 to 5, wherein the top cover sheet (1) is made of plastic, and the top cover sheet (1) is integrally formed with the explosion-proof valve (4) by injection molding to the upper connecting member (2).

17. The battery cover plate structure according to any one of claims 1 to 5, wherein the pole (3) includes an upper connecting portion (31) and a lower connecting portion (32), and the upper connecting portion (31) and the lower connecting portion (32) are connected from top to bottom.

18. A cell comprising a battery cover structure according to any one of claims 1-17.