CN218548738U

CN218548738U - Pole component and secondary battery top cover thereof

Info

Publication number: CN218548738U
Application number: CN202222759236.6U
Authority: CN
Inventors: 邓平华; 王雷
Original assignee: Jiangxi Baisili New Energy Technology Co ltd
Current assignee: Jiangxi Baisili New Energy Technology Co ltd
Priority date: 2022-10-19
Filing date: 2022-10-19
Publication date: 2023-02-28
Anticipated expiration: 2032-10-19

Abstract

The utility model provides a utmost point post subassembly and secondary battery thereof. Utmost point post subassembly includes: utmost point post, connecting piece, sealing member and enclose the last insulating part of locating utmost point post. The connecting piece is fixed on the top cover sheet, and the sealing piece is arranged between the connecting piece and the pole. Go up the protruding arch that is equipped with in the lower part of insulating part, upper portion is equipped with the notch, and protruding card is located between utmost point post and the connecting piece and butt in the sealing member, and utmost point post protruding is equipped with colludes the son, colludes the son card and locates the notch. The utility model discloses a utmost point post subassembly only needs to fix connecting piece and top cap piece, can accomplish the assembly of utmost point post and top cap piece, and its process is simple, need not loaded down with trivial details sealed and assembly process. The upper part of the upper insulating part is provided with a notch and a hook clamp of the pole, and the lower part of the upper insulating part is provided with a protrusion clamp which is arranged between the pole and the connecting part and is abutted against the sealing part, so that the upper insulating part, the pole and the connecting part are firmly connected without a complex injection molding process, and the pollution problem caused by injection molding can be avoided.

Description

Pole component and secondary battery top cover thereof

Technical Field

The utility model relates to an energy storage apparatus field especially relates to a utmost point post subassembly and secondary battery top cap thereof.

Background

The post end of the secondary battery generally comprises a post, a connecting piece fixed on the top cover in a welding manner, a sealing piece for sealing between the post and the connecting piece, and an injection molding piece for wrapping the post and the connecting piece. However, the injection molding process is complicated, and after the injection molding process is used for the vehicle battery, the connectivity is easily reduced due to the influence of collision and the like, and the pollution is easily caused, so that many manufacturers advocate to adopt other methods to replace the injection molding.

Therefore, it is desirable to provide a new top cover structure to solve the injection molding problem of the top cover structure.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an utmost point post subassembly and secondary battery top cap thereof to prior art's not enough, this utmost point post subassembly simple structure connects firmly, still can maintain the firm nature of connection between each part in the utmost point post subassembly on cancellation injection moulding's basis.

In order to achieve the above object, the utility model provides an aspect provides a utmost point post subassembly, installs in secondary battery's top sheet, include: utmost point post, connecting piece, sealing member and enclose to locate last insulating part of utmost point post, the connecting piece is fixed in on the top cap piece, the sealing member in the connecting piece with between the utmost point post, the protruding arch that is equipped with in lower part of going up the insulating part, the upper portion of going up the insulating part is equipped with the notch, protruding card is located utmost point post with between the connecting piece and the butt in the sealing member, the protruding hook that is equipped with of utmost point post, hook the card and locate the notch.

The utility model discloses a utmost point post subassembly only needs to fix connecting piece and top cap piece, can accomplish the assembly of utmost point post and top cap piece, and its process is simple, need not loaded down with trivial details sealed and assembly process. The upper part of the upper insulating part is provided with a notch and a hook clamp of the pole, and the lower part of the upper insulating part is provided with a protrusion clamp which is arranged between the pole and the connecting part and is abutted against the sealing part, so that the upper insulating part, the pole and the connecting part are firmly connected without a complex injection molding process, and the pollution problem caused by injection molding can be avoided.

As an embodiment, the pole includes a terminal portion, a first portion, a second portion and a third portion sequentially arranged from top to bottom, the terminal portion is convexly disposed on the upper insulating member, the hook is disposed on the peripheral wall of the first portion, the upper insulating member is surrounded on the second portion, and the sealing member abuts between the connecting member and the third portion.

As an embodiment, the hook includes an extension portion protruding from the second portion and a bent portion protruding from the lower portion of the extension portion.

As an embodiment, the bottom of the bent part is provided with a rounded corner, and the R angle is 0.05-2.0 mm.

As an embodiment, the bent part is of an inverted cone structure or a pyramid structure.

As an embodiment, the size of the bent part along the vertical direction is 0.2-2.0 mm, and the minimum size of the bent part along the horizontal direction is 0.5-3.0 mm.

The utility model discloses another aspect provides a secondary battery top cap, including the top cap piece with set up in utmost point post subassembly on the top cap piece, the top cap piece is equipped with first mounting hole, utmost point post subassembly borrows by the connecting piece is fixed in first mounting hole. The utility model discloses a secondary battery top cap only needs to fix utmost point post subassembly and top cap piece, can accomplish the assembly of utmost point post and top cap piece, and its process is simple, need not loaded down with trivial details sealed and assembly process.

As an embodiment, the lower portion of the top cover plate is recessed to form a stepped first mounting hole, and the connecting member is clamped and fixed to the first mounting hole, so that the size of the secondary battery top cover in the vertical direction can be reduced to improve the volume energy density.

As an embodiment, a lower insulating part is arranged below the top cover plate, and the lower insulating part is clamped with the pole.

Drawings

Fig. 1 is a perspective view of a secondary battery top cap according to the present invention.

Fig. 2 is a plan view of the secondary battery top cap of the present invention.

Fig. 3 is a bottom view of the secondary battery top cap of the present invention.

Fig. 4 is an exploded view of the secondary battery top cover of the present invention in a first direction.

Fig. 5 isbase:Sub>A cross-sectional view taken alongbase:Sub>A-base:Sub>A of fig. 2.

Fig. 6 is a top view of the pole assembly of the present invention.

Fig. 7 is a perspective view of the pole assembly of the present invention.

Fig. 8 is a perspective view of the pole assembly of the present invention in the first direction.

Fig. 9 is a perspective view of the pole assembly of the present invention in a second direction.

Fig. 10 is an enlarged view of the circled portion in fig. 5.

Fig. 11 is a cross-sectional view of fig. 6 in the direction B-B.

Fig. 12 is an enlarged view of the circled portion in fig. 11.

Fig. 13 is a variation of fig. 12.

Fig. 14 is a further modification of fig. 12.

Fig. 15 is a cross-sectional view of fig. 12 before the bent portion is not formed.

Description of the element reference numerals

100-secondary battery top cover; 10-a top cover sheet; 11-liquid injection hole; 13-a first mounting hole; 15-a second mounting hole; 17-a third mounting hole; 30-pole assembly/pole assembly; 31-pole; 311-third section; 3111-a card slot; 313-a second portion; 315-first part; 3151-hook; 3151 a-a bend; 3151 b-an extension; 317-terminal part; 33-an upper insulator; 331-notch; 333-projection; 35-a seal; 351-notch; 37-a connector; 39-bumps; 50-a second pole post assembly; 70-an explosion-proof valve assembly; 71-an explosion-proof valve; 73-an explosion-proof protective film; 90-lower insulation; 91-a snap-in part; h-the dimension in the vertical direction; w-dimension in horizontal direction

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It should be noted that, in general, the secondary battery is placed vertically, one side of the secondary battery top cover, where the pole extends out and is connected with the outside, is an upper side, and the other side is a lower side, and the thickness refers to the dimension along the up-and-down direction.

The utility model discloses a secondary battery top cap can be used to the sealed casing and prepares secondary battery, and the secondary battery top cap can weld with the casing and seal. Referring to fig. 1 to 5 and 10, a secondary battery top cap 100 includes a top cap sheet 10, and a pole assembly 30 and a second pole assembly 50 disposed on the top cap sheet 10, and a lower insulating member 90 is disposed below the top cap sheet 10 for electrically insulating the top cap sheet 10 from a cell in a case (not shown).

The utility model discloses a utmost point post subassembly 30 can be positive pole post subassembly, also can be negative pole post subassembly, of course, and second utmost point post subassembly 50 can be negative pole post subassembly, also can be positive pole post subassembly. The structures are the same, so for convenience of description, one of the pole assemblies is described in detail, and the other pole assembly can adopt a similar mode. The top cover plate 10 is provided with a liquid injection hole 11, a first mounting hole 13, a second mounting hole 15 and a third mounting hole 17. The first mounting hole 13 and the second mounting hole 15 are used to mount the positive electrode pillar assembly and the negative electrode pillar assembly, respectively. The third mounting hole 17 is used for mounting an explosion-proof valve assembly 70, and the explosion-proof valve assembly 70 comprises an explosion-proof valve 71 which is hermetically fixed in the third mounting hole 17 and an explosion-proof protective film which is arranged above the explosion-proof valve 71. The lower portion of the top cap sheet 10 is recessed to form the stepped first mounting hole 13, and the pole assembly 30 is fixed to the first mounting hole 13, because the size of the secondary battery top cap 100 in the vertical direction can be reduced to improve the volumetric energy density.

As shown in fig. 1 to 14, the negative electrode tab assembly 30 includes a terminal tab 31, a connector 37, a sealing member 35, and an upper insulating member 33 surrounding the terminal tab 31. The connector 37 is fixed on the top cover 10, and the sealing element 35 is arranged between the connector 37 and the pole 31. The lower part of the upper insulator 33 is protruded with a protrusion 333, and the upper part of the upper insulator 33 is provided with a notch 331. The protrusion 333 is clamped between the pole 31 and the connector 37 and abuts against the sealing element 35, the pole 31 is convexly provided with a hook 3151, and the hook 3151 is clamped in the notch 331. The utility model discloses a secondary cell top cap 100 through connecting piece 37 joint and be fixed in first mounting hole 13 and can accomplish the assembly of utmost point post 31 and top cap piece 10, and its process is simple, need not loaded down with trivial details sealed and assembly process.

As further shown in fig. 10 to 14, the post 31 includes a terminal portion 317, a first portion 315, a second portion 313, and a third portion 311, which are provided in this order from the top. The terminal portion 317 is protruded from the upper insulator 33, the hook 3151 is provided on the peripheral wall of the first portion 315, the upper insulator 33 is surrounded by the second portion 313, and the sealing member 35 is abutted between the connecting member 37 and the third portion 311.

As an embodiment, the hook 3151 includes an extending portion 3151b protruding from the second portion 313 and a bending portion 3151a protruding from the extending portion 3151 b. Further, as shown in fig. 12 to 13, the bottom of the bent portion 3151a is provided with a rounded corner, and the R angle is 0.05 to 2.0mm. As shown in fig. 14, the bent portion 3151a has an inverted cone structure or a pyramid structure, preferably a rounded structure, and is more easily processed. The dimension H of the bent portion 3151a in the vertical direction is 0.2 to 2.0mm, preferably 0.2 to 1.0mm, and more preferably 0.5 to 1.0mm. The minimum dimension W of the bent portion 3151a in the horizontal direction is 0.5 to 3.0mm, preferably 0.5 to 2.0mm, and more preferably 1.0 to 2.0mm. When the bent portion 3151a has an inverted conical or pyramidal structure, W is a dimension of the bottommost portion in the horizontal direction.

The utility model discloses a utmost point post subassembly 30 is when assembling, earlier with having elastic sealing member 35 cover and locating utmost point post 31's outer wall, suppresses connecting piece 37 in sealing member 35's top again to will go up the protruding 333 gomphosis of lower extreme of insulating part 33 between connecting piece 37 and utmost point post 31, thereby form colluding the ware 3151 in the notch 331 of riveting supreme insulating part 33 with the lug 39 (as shown in fig. 15) of utmost point post 31 top at last.

As an embodiment, a lower insulating member 90 is disposed below the top cover 10, and the lower insulating member 90 is engaged with the pole 31. A notch 3111 is provided around the third portion 311 of the pole 31 to engage with the engaging portion 91 of the lower insulator 90, and the seal 35 may be provided with a notch 351 above the notch 3111 in order to prevent the seal 35 from blocking the notch 3111 when being squeezed.

The utility model discloses a utmost point post subassembly 30 only needs to fix connecting piece 37 and top cap piece 10, can accomplish utmost point post 31 and top cap piece 10's assembly, and its process is simple, need not loaded down with trivial details sealed and assembly process. The upper part of the upper insulator 33 is provided with a notch 331 to be clamped with the hook 3151 of the pole 31, and the lower part is provided with a bulge 333 to be clamped between the pole 31 and the connector 37 and abutted against the sealing element 35, so that the upper insulator 33, the pole 31 and the connector 37 are firmly connected without a complex injection molding process, and the pollution problem caused by injection molding can be avoided.

It should be noted that the above-mentioned embodiments illustrate rather than limit the scope of the invention, and that modifications of various equivalent forms of the invention, which may occur to those skilled in the art after reading the present application, fall within the scope of the appended claims.

Claims

1. A post assembly (30) mounted to a top lid sheet (10) of a secondary battery, comprising: utmost point post (31), connecting piece (37), sealing member (35) and enclose and locate last insulating part (33) of utmost point post (31), connecting piece (37) are fixed in on top cap piece (10), sealing member (35) are in connecting piece (37) with between utmost point post (31), the protruding arch (333) that is equipped with in lower part of going up insulating part (33), the upper portion of going up insulating part (33) is equipped with notch (331), protruding (333) card is located utmost point post (31) with between connecting piece (37) and butt in sealing member (35), utmost point post (31) are protruding to be equipped with and collude sub (3151), collude sub (3151) card is located notch (331).

2. The pole assembly (30) of claim 1, wherein the pole (31) comprises a terminal portion (317), a first portion (315), a second portion (313) and a third portion (311) which are sequentially arranged from top to bottom, the terminal portion (317) is convexly arranged on the upper insulating member (33), the hook (3151) is arranged on the peripheral wall of the first portion (315), the upper insulating member (33) is arranged around the second portion (313), and the sealing member (35) abuts between the connecting member (37) and the third portion (311).

3. The pole assembly (30) of claim 2, wherein the hook (3151) comprises an extension portion (3151 b) protruding from the second portion (313) and a bent portion (3151 a) protruding from the extension portion (3151 b) at a lower portion thereof.

4. The pole assembly (30) of claim 3, wherein the bottom of the bent portion (3151 a) is provided with a rounded corner, and the R angle is 0.05-2.0 mm.

5. A pole assembly (30) according to claim 3, characterized in that the bent portion (3151 a) is of inverted cone or pyramid structure.

6. The pole assembly (30) of claim 3, wherein the dimension of the bent portion (3151 a) in the vertical direction is 0.2-2.0 mm and the minimum dimension of the bent portion (3151 a) in the horizontal direction is 0.5-3.0 mm.

7. The utility model provides a secondary cell top cap (100), its characterized in that, including top cap piece (10) with set up in utmost point post subassembly (30) on top cap piece (10), top cap piece (10) are equipped with first mounting hole (13), utmost point post subassembly (30) borrow by connecting piece (37) are fixed in first mounting hole (13).

8. The secondary battery top cap (100) according to claim 7, wherein the lower part of the top cap sheet (10) is recessed to form a stepped first mounting hole (13), and the connecting member (37) is clamped and fixed to the first mounting hole (13).

9. The secondary battery top cap (100) according to claim 8, wherein a lower insulating member (90) is arranged below the top cap piece (10), and the lower insulating member (90) is clamped with the pole (31).