CN219892367U

CN219892367U - Square shell battery cover plate structure, battery and battery module

Info

Publication number: CN219892367U
Application number: CN202223607361.1U
Authority: CN
Inventors: 易小刚; 杨道均; 黄智博
Original assignee: Sany Hongxiang Battery Co ltd
Current assignee: Sany Hongxiang Battery Co ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-10-24
Anticipated expiration: 2032-12-28

Abstract

The utility model provides a square shell battery cover plate structure, a battery and a battery module, and relates to the technical field of batteries. The square shell battery cover plate structure comprises a cover plate assembly, a pole column and a sealing piece, wherein the cover plate assembly is provided with a mounting hole; the pole is arranged in the mounting hole; the pole is provided with a groove, and an explosion-proof valve is arranged in the groove; the sealing member is disposed in the sealing gap between the cover plate assembly and the pole. The utility model can solve the problems of more processing procedures and high assembly precision requirement caused by the arrangement of the explosion-proof valve on the battery cover plate in the prior art, has the advantages of less processing procedures and low assembly precision requirement, reduces the cost of the polar post and the square shell battery cover plate, is more convenient and quick to assemble, and is beneficial to improving the production efficiency of the square shell battery.

Description

Square shell battery cover plate structure, battery and battery module

Technical Field

The utility model relates to the technical field of batteries, in particular to a square shell battery cover plate structure, a battery and a battery module.

Background

Currently, the application field of batteries is wider and wider, and the safety performance of the batteries is an important index which cannot be ignored. In order to ensure safety performance, the existing chargeable square battery is provided with holes in the cover plate, explosion-proof valves are arranged in the holes, so that the number of mounting holes in the cover plate is large, the stability of the whole structure of the battery is influenced, the processing procedures are large, and the requirement on assembly precision is high.

Disclosure of Invention

The utility model aims to overcome the defects of more battery cover plate processing procedures and high assembly precision requirement in the prior art, and further provides a square shell battery cover plate structure, a battery and a battery module.

In order to solve the above problems, a first aspect of the present utility model provides a square-case battery cover plate structure, including a cover plate assembly, a post and a sealing member, the cover plate assembly being provided with a mounting hole; the pole is arranged in the mounting hole; the pole is provided with a groove, and the bottom of the groove is provided with an explosion-proof valve; the sealing member is disposed in the sealing gap between the cover plate assembly and the pole.

Optionally, the bottom of the groove is provided with a weak area, the thickness of the bottom of the groove at the peripheral side of the weak area is larger than that of the weak area, and the weak area forms an explosion-proof valve.

Optionally, the groove and the explosion-proof valve are integrally formed by stamping.

Optionally, the top surface of the explosion-proof valve is provided with a notch.

Optionally, the pole includes a pole flange disposed at an open end of the recess.

Optionally, the sealing member includes the first seal section and the second seal section that can integrated into one piece or components of a whole that can function independently set up, and the first seal section is located between the lateral wall of recess and the inner wall of mounting hole, and the second seal section centre gripping is between the protruding edge of utmost point post and the up end of apron subassembly.

Optionally, the sealing member further comprises a third sealing section connected with the second sealing section, and an inner side wall of the third sealing section is abutted with an outer side wall of the pole protruding edge.

Optionally, the square shell battery cover plate structure comprises a connecting sheet, the connecting sheet is arranged on the lower surface of the cover plate assembly, and the connecting sheet is electrically connected with the pole.

Optionally, the cover plate assembly includes a first cover plate and a second cover plate disposed below the first cover plate, and the mounting hole penetrates through the first cover plate and the second cover plate.

Optionally, the mounting holes are two, the poles are two, and the positive pole and the negative pole are respectively arranged in the two mounting holes.

Optionally, the cover plate component is provided with a liquid injection hole.

The second aspect of the utility model provides a battery, comprising a battery core and the square-shell battery cover plate structure of any one of the above technical schemes, wherein the battery core is provided with a tab, and a pole is electrically connected with the tab.

A third aspect of the present utility model provides a battery module including the battery of the above technical scheme.

The utility model has the following advantages:

1. according to the technical scheme, the groove structure is arranged on the basis of the pole, the explosion-proof valve is arranged in the groove, more holes are not required to be formed in the cover plate of the square-shell battery for installing the explosion-proof valve, the overall stability of the square-shell battery can be ensured, and the requirement on the assembly precision is low; in the second aspect, the pole is provided with the groove, so that the pole is formed integrally by stamping, and the processing procedure is reduced; in the third aspect, the pole is provided with the groove, so that the material consumption of the pole can be reduced, and the cost of the pole and the square shell battery cover plate is reduced. The square shell battery cover plate structure provided by the utility model is applied to a square shell battery, and the polar posts can be arranged in the mounting holes of the cover plate component from top to bottom, so that the assembly is more convenient and rapid, and the production efficiency of the square shell battery is improved.

2. Through set up the region of weakness on the recess to the region of weakness forms explosion-proof valve, can pass through integrative stamping forming with explosion-proof valve and utmost point post body, with explosion-proof valve and utmost point post integration in an organic whole, reduces the process of trompil on the apron subassembly, further improves square shell battery apron bulk strength and stability, thereby improves square shell battery's security performance.

3. The sealing element is provided with a first sealing section, the gap between the side wall of the groove and the inner wall of the mounting hole can be sealed, the sealing element is provided with a second sealing section, the gap between the convex edge of the pole and the upper end face of the cover plate assembly can be sealed, transverse and vertical bidirectional double sealing is realized, and the sealing performance and the reliability of the square-shell battery are improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 shows an exploded view of a square battery cover plate structure provided by an embodiment of the present utility model;

fig. 2 shows a schematic structural diagram of a post and an explosion-proof valve in a square-case battery cover plate structure according to an embodiment of the present utility model;

fig. 3 is a cross-sectional view showing a structure of a square battery cover plate according to an embodiment of the present utility model;

FIG. 4 shows a schematic diagram of a positional relationship between an explosion proof valve and a post;

FIG. 5 shows yet another schematic of the positional relationship between the explosion proof valve and the post;

fig. 6 is a schematic view showing the structure of a battery according to an embodiment of the present utility model;

fig. 7 is a schematic view showing the structure of a battery module according to an embodiment of the present utility model;

fig. 8 shows a schematic structural view of the adapter in fig. 7.

Reference numerals illustrate:

1. a cover plate assembly; 11. a first cover plate; 12. a second cover plate; 13. a mounting hole; 2. a pole; 21. a groove; 211. an inner bottom wall; 22. an explosion-proof valve; 221. scoring; 23. a pole convex edge; 24. a positive electrode post; 25. a negative electrode post; 26. a bottom surface; 3. a seal; 31. a first seal segment; 32. a second seal section; 33. a third seal section; 4. a connecting sheet; 41. a positive electrode connecting sheet; 42. a negative electrode connecting sheet; 5. a liquid injection hole; 6. an adapter; 10. a square shell battery cover plate structure; 20. a battery; 30. and a battery module.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. 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 be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

For the purpose of illustrating the concepts of the utility model, the drawings and detailed description are to be regarded as illustrative in nature and not as restrictive.

Example 1

A square shell battery cover plate structure 10, referring to fig. 1-3, comprises a cover plate assembly 1, a pole 2 and a sealing piece 3, wherein the cover plate assembly 1 is provided with a mounting hole 13; the pole 2 is arranged in the mounting hole 13; the pole 2 is provided with a groove 21, and an explosion-proof valve 22 is arranged in the groove 21; the seal 3 is provided in the sealing gap between the cap plate assembly 1 and the pole 2. It will be appreciated that the explosion-proof valve 22 may be disposed not only flush with the bottom surface 26 of the post 2 (as shown in fig. 5), but also not flush with the bottom surface 26 of the post 2, i.e., flush with the inner bottom wall 211 of the recess 21 (as shown in fig. 4), or disposed therebetween (as shown in fig. 3).

By utilizing the technical scheme of the utility model, as the groove 21 is arranged on the pole column 2, the explosion-proof valve 22 is arranged in the groove 21 in the first aspect, and more holes are not required to be arranged on the cover plate of the square-shell battery 20 for installing the explosion-proof valve 22, the overall stability of the square-shell battery 20 can be ensured, and the requirement on the assembly precision is low; in the second aspect, the pole 2 is provided with the groove 21, so that the pole is formed integrally by stamping, and the processing procedure is reduced; in the third aspect, the grooves 21 are formed in the pole 2, so that the material consumption of the pole 2 can be reduced, and the cost of the pole 2 and the cover plate of the square-shell battery 20 can be reduced. The square shell battery cover plate structure 10 provided by the utility model is applied to the square shell battery 20, and the pole 2 can be arranged in the mounting hole 13 of the cover plate assembly 1 from top to bottom, so that the assembly is more convenient and rapid, and the production efficiency of the square shell battery 20 is improved.

Optionally, the bottom of the groove 21 has a weakened area, and the thickness of the bottom of the groove 21 on the outer peripheral side of the weakened area is greater than the thickness of the weakened area, and the weakened area forms the explosion-proof valve 22. By providing a weakened area on the groove 21, an explosion-proof valve 22 is formed with the weakened area. In this embodiment, the weak area is formed by pressurizing the bottom of the groove 21, the explosion-proof valve 22 and the pole 2 are integrated into a whole, the procedure of opening holes in the cover plate assembly 1 is reduced, and the overall strength and stability of the cover plate of the square-shell battery 20 are further improved, so that the safety performance of the square-shell battery 20 is improved.

Alternatively, the recess 21 and the explosion-proof valve 22 are punched integrally. By adopting stamping integrated forming, the working procedures can be reduced, the production efficiency and the material utilization rate are improved, the generation of leftover materials caused by punching and blanking is reduced, and the material cost is reduced.

Optionally, the top surface of the explosion proof valve 22 is provided with a score 221. Score 221 may be of an open configuration, as shown in fig. 2, score 221 is "Y" shaped, although other shapes are possible, such as letters "S", "C", "Z", "H", "X", etc. Score 221 may also be a closed configuration such as rectangular, circular, oval, etc. Providing the score 221 facilitates the bursting of the burst valve 22. The strength of the position where the notch 221 is provided is smaller than that of the position where the notch 221 is not provided, so that under the impact of pressure, the position where the notch 221 is provided is preferentially blasted, and pressure relief is achieved.

Optionally, the pole 2 comprises a pole flange 23 provided at the open end of the recess 21. When the pole 2 is assembled with the cover plate assembly 1, the groove 21 is arranged in the mounting hole 13 from top to bottom, and the pole convex edge 23 is positioned above the upper surface of the cover plate assembly 1.

Optionally, the sealing member 3 includes a first sealing section 31 and a second sealing section 32 that may be integrally formed or separately provided, the first sealing section 31 is disposed between a side wall of the groove 21 and an inner wall of the mounting hole 13, and the second sealing section 32 is clamped between the pole flange 23 and an upper end surface of the cover plate assembly 1. The first seal segment 31 is capable of sealing a gap between the side wall of the groove 21 and the inner wall of the mounting hole 13; the second sealing section 32 can seal the gap between the pole convex edge 23 and the upper end face of the cover plate assembly 1, so that transverse and vertical bidirectional double sealing is realized, and the tightness and reliability of the square-shell battery 20 are improved.

Optionally, the seal 3 further comprises a third seal segment 33 connected to the second seal segment 32, the inner side wall of the third seal segment 33 abutting the outer side wall of the pole flange 23. The third sealing section 33 is arranged, so that the leakage path of the leaked liquid can be prolonged, and the sealing effect is improved; and, after the assembly of utmost point post 2 and apron subassembly 1 is accomplished, third seal section 33 is located the outer lane of utmost point post protruding edge 23, and sealing member 3 adopts insulating material to make, can be with insulating between utmost point post 2 and the apron subassembly 1.

Alternatively, referring to fig. 3, the square-case battery cover structure 10 includes a connection piece 4, the connection piece 4 is disposed on the lower surface of the cover assembly 1, and the connection piece 4 is electrically connected with the post 2. The connecting sheet 4 is made of conductive materials, one surface of the connecting sheet 4 is electrically connected with the pole 2, and the other surface of the connecting sheet is electrically connected with the pole lug of the battery cell, so that the pole 2 is electrically connected with the pole lug of the battery cell.

Alternatively, referring to fig. 1, the cover assembly 1 includes a first cover plate 11 and a second cover plate 12 disposed under the first cover plate 11, and the mounting hole 13 penetrates the first cover plate 11 and the second cover plate 12. When assembled, referring to fig. 3, the bottom of the groove 21 of the pole 2 penetrates the mounting hole 13 of the second cover plate 12 and then is connected with the connecting piece 4.

Optionally, two mounting holes 13 are provided, two poles 2 are provided, namely a positive pole 24 and a negative pole 25, and the positive pole 24 and the negative pole 25 are respectively arranged in the two mounting holes 13. Correspondingly, two connecting pieces 4 are provided, namely a positive connecting piece 41 and a negative connecting piece 42, one surface of the positive connecting piece 41 is connected with the positive pole column 24, the other surface is connected with the positive pole lug of the battery cell, one surface of the negative connecting piece 42 is connected with the negative pole column 25, and the other surface is connected with the negative pole lug of the battery cell.

Optionally, the cover plate assembly 1 is provided with a liquid injection hole 5. Specifically, the liquid injection hole 5 penetrates the first cover plate 11 and the second cover plate 12.

Example 2

A battery 20, referring to fig. 6, includes a battery cell having a tab, and a square-case battery cover structure 10 as described in embodiment 1, with a post 2 electrically connected to the tab.

Example 3

A battery module 30, referring to fig. 7, includes the battery 20 described in embodiment 2.

Optionally, the poles 2 between adjacent cells 20 are electrically connected by the adapter 6. The adapter 6 is made of a conductive material, and the batteries 20 can be connected in series as the battery module 30 through the adapter 6.

Specifically, the adapter 6 has a plate-like structure, and referring to fig. 8, two holes are formed in the adapter 6 for connecting the two poles 2 of the two batteries 20, respectively.

According to the above description, the present patent application has the following advantages:

1. the pole column 2 is provided with the groove 21, the bottom of the groove 21 is provided with the explosion-proof valve 22, and a plurality of holes are not required to be formed in the cover plate of the square-shell battery 20 for installing the explosion-proof valve 22, so that the overall stability of the square-shell battery 20 can be ensured, and the requirement on the assembly precision is low; the electrode post 2 can be arranged in the mounting hole 13 of the cover plate component 1 from top to bottom, so that the assembly is more convenient and quick, and the production efficiency of the square-shell battery 20 is improved;

2. the grooves 21 are formed in the pole 2, so that the material consumption of the pole 2 can be reduced, and the cost of the pole 2 and the cover plate of the square-shell battery 20 can be reduced;

3. the explosion-proof valve 22 and the pole 2 are integrally formed by stamping, so that the explosion-proof valve 22 and the pole 2 are integrated, holes on the cover plate assembly 1 are reduced, the overall strength and stability of the cover plate of the square-shell battery 20 are further improved, and the safety performance of the square-shell battery 20 is further improved;

4. and the sealing piece 3 is arranged between the pole 2 and the cover plate assembly 1, so that transverse and vertical bidirectional double sealing can be realized, and the sealing performance and reliability of the square-shell battery 20 are improved.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. A square-case battery cover plate structure, comprising:

the cover plate assembly (1), the cover plate assembly (1) is provided with a mounting hole (13);

the pole post (2), the said pole post (2) locates in the said mounting hole (13); the pole (2) is provided with a groove (21), and the middle bottom of the groove (21) is provided with an explosion-proof valve (22);

and the sealing piece (3) is arranged in a sealing gap between the cover plate assembly (1) and the pole (2).

2. The square-case battery cover plate structure according to claim 1, wherein the bottom of the groove (21) has a weakened area, the thickness of the bottom of the groove (21) on the outer peripheral side of the weakened area is greater than the thickness of the weakened area, and the weakened area forms the explosion-proof valve (22).

3. The square-case battery cover plate structure according to claim 1, wherein the groove (21) and the explosion-proof valve (22) are integrally formed by punching.

4. A square-case battery cover plate structure according to any one of claims 1-3, characterized in that the top surface of the explosion-proof valve (22) is provided with a score (221).

5. A square-case battery cover plate structure according to any one of claims 1-3, wherein the polar column (2) comprises a polar column convex edge (23) provided at an opening end of the groove (21);

optionally, the sealing element (3) comprises a first sealing section (31) and a second sealing section (32) which can be integrally formed or arranged in a split mode, the first sealing section (31) is arranged between the side wall of the groove (21) and the inner wall of the mounting hole (13), and the second sealing section (32) is clamped between the pole convex edge (23) and the upper end face of the cover plate assembly (1).

6. The square-case battery cover plate structure according to claim 5, wherein the sealing member (3) further comprises a third sealing section (33) connected to the second sealing section (32), and an inner side wall of the third sealing section (33) abuts against an outer side wall of the pole bead (23).

7. A square-case battery cover plate structure according to any one of claims 1-3, characterized in that the square-case battery cover plate structure comprises a connecting sheet (4), the connecting sheet (4) is provided on the lower surface of the cover plate assembly (1), and the connecting sheet (4) and the pole (2) are electrically connected.

8. A square-case battery cover plate structure according to any one of claims 1-3, wherein the cover plate assembly (1) comprises a first cover plate (11) and a second cover plate (12) arranged below the first cover plate (11), the mounting holes (13) penetrating through the first cover plate (11) and the second cover plate (12);

and/or two mounting holes (13) are formed, two pole posts (2) are respectively a positive pole post (24) and a negative pole post (25), and the positive pole post (24) and the negative pole post (25) are respectively arranged in the two mounting holes (13);

and/or the cover plate component (1) is provided with a liquid injection hole (5).

9. A battery comprising a cell having a tab, and a square-case battery cover structure as claimed in any one of claims 1 to 8, the post (2) being electrically connected to the tab.

10. A battery module comprising at least two batteries according to claim 9.