阅读说明：本技术 一种新型锂离子电芯用顶盖组件结构 (Novel top cover assembly structure for lithium ion battery cell ) 是由 朱鹏翔 谭明胜 徐峥 明文豪 何巍 于 2021-06-10 设计创作，主要内容包括：本发明公开了一种新型锂离子电芯用顶盖组件结构,包括光铝片、铝块和对接结构,所述光铝片设置有第一通孔；所述铝块设有与第一通孔相对应的第二通孔；所述对接结构至少包括极柱和铆接铜环,极柱依次贯穿所述第一通孔、第二通孔,且与铆接铜环形成连接；所述铆接铜环嵌合在第二通孔上,且与铝块形成连接。该结构取消了摩擦焊接,提高了结构的可靠性,降低了顶盖组件成本。(The invention discloses a novel top cover assembly structure for a lithium ion cell, which comprises a smooth aluminum sheet, an aluminum block and a butt joint structure, wherein the smooth aluminum sheet is provided with a first through hole; the aluminum block is provided with a second through hole corresponding to the first through hole; the butt joint structure at least comprises a pole and a riveting copper ring, wherein the pole sequentially penetrates through the first through hole and the second through hole and is connected with the riveting copper ring; the riveting copper ring is embedded in the second through hole and connected with the aluminum block. The structure cancels friction welding, improves the reliability of the structure and reduces the cost of the top cover assembly.)

1. The utility model provides a novel top cap subassembly structure for lithium ion cell, includes smooth aluminum sheet, aluminium pig and butt joint structure, its characterized in that: the smooth aluminum sheet is provided with a first through hole; the aluminum block is provided with a second through hole corresponding to the first through hole; the butt joint structure at least comprises a pole and a riveting copper ring, wherein the pole sequentially penetrates through the first through hole and the second through hole and is connected with the riveting copper ring; the riveting copper ring is embedded in the second through hole and connected with the aluminum block.

2. The novel top cover assembly structure for the lithium ion battery cell of claim 1, wherein the riveted copper ring, the terminal post and the aluminum block are connected by riveting.

3. The novel top cover assembly structure for the lithium ion battery cell according to claim 2, wherein a joint of the riveting copper ring and the pole is fused by laser welding to form a copper laser welding pool; and the joint of the riveting copper ring and the aluminum block is fused by laser welding to form a copper-aluminum laser welding pool.

4. The novel cap assembly structure for the lithium ion battery cell of claim 1, further comprising a base disposed below the smooth aluminum sheet, wherein the base is provided with a third through hole for a pole to pass through; the lower end part of the pole is provided with a limit bottom block matched with the base, so that when the pole penetrates through the third through hole, the limit bottom block is clamped on the lower end surface of the base.

5. The novel top cover assembly structure for the lithium ion battery cell as claimed in claim 1, wherein the upper end of the riveting copper ring is provided with a step part protruding outwards, the step part is configured to be matched with an aluminum block, and when the riveting copper ring is in butt joint with a pole, the step part rests on the aluminum block.

6. The novel top cover assembly structure for the lithium ion battery cell as claimed in claim 5, wherein a table top for resting a riveting copper ring step is arranged in the second through hole.

7. The structure of the novel top cap assembly for the lithium ion battery cell as claimed in claim 6, wherein the post has a circle of butt-joint grooves with opposite side walls recessed inwards, and the inner side of the lower end of the riveting copper ring is provided with a butt-joint portion matched with the butt-joint groove of the post, so that the riveting copper ring and the post are buckled to form a butt-joint structure.

8. The novel top cover assembly structure for the lithium ion battery cell of claim 1, further comprising a limiting structure, wherein the limiting structure is provided with a placing groove for placing an aluminum block, the placing groove is provided with a fourth through hole corresponding to the second through hole of the aluminum block, and the fourth through hole is used for a pole to pass through.

9. The novel top cover assembly structure for the lithium ion battery cell as claimed in claim 3, wherein the riveting copper ring and the terminal are preferably in a Cu T2O state, the aluminum block is preferably in an Al 1060O state, the laser welding penetration at the copper laser welding pool is preferably not less than 0.5mm, and the laser welding penetration at the copper aluminum laser welding pool is preferably not less than 0.5 mm.

10. The novel top cap assembly structure for the lithium ion battery cell of any one of claims 1 to 9, further comprising a sealing ring, wherein the sealing ring is sleeved on the pole, and one end of the sealing ring close to the plain aluminum sheet is connected with the plain aluminum sheet in a matching manner.

Technical Field

The invention relates to the technical field of lithium ion batteries, in particular to a novel top cover assembly structure for a lithium ion battery cell.

Background

Lithium ion battery is a secondary battery, mainly rely on lithium ion to remove between anodal and negative pole and discharge, along with the high-speed development of society, the continuous improvement of science and technology level, lithium ion battery has obtained extensive application, on digital product, unmanned aerial vehicle and electric automobile, the lithium ion battery's that can both see shadow, and the top cap subassembly for the lithium ion cell is the important part that lithium ion battery constitutes, but there are many problems or defects in the current novel top cap subassembly structure for the lithium ion cell:

traditional novel top cap subassembly structure for lithium ion cell adopts the friction welding process more in-service use, and the friction welding process is with high costs, and the quality is unstable, has certain risk.

Disclosure of Invention

The invention aims to provide a novel top cover assembly structure for a lithium ion battery cell, and aims to solve the problem that the novel top cover assembly structure for the lithium ion battery cell is high in cost in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a novel top cover assembly structure for a lithium ion cell comprises a smooth aluminum sheet, an aluminum block and a butt joint structure, wherein the smooth aluminum sheet is provided with a first through hole; the aluminum block is provided with a second through hole corresponding to the first through hole; the butt joint structure at least comprises a pole 6a and a riveting copper ring, wherein the pole sequentially penetrates through the first through hole and the second through hole and is connected with the riveting copper ring; the riveting copper ring is embedded in the second through hole and connected with the aluminum block.

And the riveting copper ring, the pole and the aluminum block are connected through riveting.

Specifically, the aluminum block is formed by punching, the riveting copper ring is formed by punching a copper plate, and the pole is machined and manufactured by copper materials. During riveting, the aluminum block, the pole and the riveting copper ring are assembled in the sequence, and in the riveting process, the three are riveted and fixed in a riveting mode, so that the three are tightly matched.

Preferably, the joint of the riveting copper ring and the pole is fused by laser welding (a copper laser welding pool is formed at the joint); and the joint of the riveting copper ring and the aluminum block is fused by laser welding (a copper-aluminum laser welding pool is formed at the joint).

Specifically, after the three components are riveted and connected, laser welding is further carried out, so that the assembled joint is fused by welding. The purpose of laser welding is that although the three parts are connected by riveting, the internal resistance of the structure is larger, and laser welding can further fuse and connect the three parts, thereby reducing the internal resistance.

Preferably, the novel top cover assembly structure for the lithium ion cell further comprises a base arranged below the smooth aluminum sheet, and the base is provided with a third through hole for the pole to pass through; the lower end part of the pole is provided with a limit bottom block matched with the base, so that when the pole penetrates through the third through hole, the limit bottom block is clamped on the lower end surface of the base.

Specifically, the pole column sequentially penetrates through the third through hole, the first through hole and the second through hole and is connected with the riveting copper ring in a matched mode.

Preferably, the upper end of riveting copper ring is equipped with the bellied step portion in outside, the step portion configuration is to cooperateing with the aluminium pig, when riveting copper ring and utmost point post butt joint are during, the step portion is shelved on the aluminium pig.

Preferably, a table-board 302 for placing the step part of the riveting copper ring is arranged in the second through hole of the aluminum block.

Preferably, the terminal is provided with a circle of butt joint grooves which are sunken inwards relative to the side wall surface, and the inner side of the lower end part of the riveting copper ring is provided with a butt joint part matched with the butt joint grooves of the terminal, so that the riveting copper ring and the terminal 6a are buckled to form a butt joint structure.

Preferably, the novel top cover assembly structure for the lithium ion cell further comprises a limiting structure, wherein the limiting structure is provided with a placing groove for placing an aluminum block, the placing groove is provided with a fourth through hole corresponding to the second through hole of the aluminum block, and the fourth through hole is used for a pole to pass through.

Preferably, novel top cap subassembly structure for lithium ion cell still includes the sealing washer, the sealing washer cover is established on utmost point post, and the sealing washer is close to the one end and the cooperation of light aluminum sheet and is connected.

Preferably, the base and the limiting structure are made of plastic.

Preferably, the stepped portion has a circular shape.

Preferably, the thickness of the riveting copper ring is 0.5mm, and the thickness of the weak part of the riveting copper ring after riveting is 0.3 mm.

Preferably, the riveting copper ring and the terminal are preferably in a Cu T2O state, the aluminum block is preferably in an Al 1060O state, the laser welding penetration at the copper laser welding pool is preferably not less than 0.5mm, and the laser welding penetration at the copper aluminum laser welding pool is preferably not less than 0.5 mm.

Compared with the prior art, the invention has the beneficial effects that: the novel top cover component structure for the lithium ion battery cell not only realizes lower cost of the top cover component, but also realizes the limiting function among parts and longer service life;

(1) the riveting part is formed by mutually matching and connecting the riveting copper ring, the aluminum block and the pole, the three parts are closely matched in structure by a riveting mode, and finally the three parts are connected together by laser welding, so that the friction welding is cancelled, the reliability of the structure is improved, and the cost of the top cover assembly is reduced;

(2) the size through the standing groove is unanimous with the size of aluminium piece, can establish the bottom at the aluminium piece with last plastic cover, restricts the position of aluminium piece, can prevent that the aluminium piece from taking place the phenomenon of skew in the equipment process to make novel top cap subassembly structure for lithium ion cell have limit function.

Drawings

FIG. 1 is an exploded view of the structure of a header assembly according to the present invention;

FIG. 2 is a schematic front view of the structure of the cover assembly according to the present invention;

FIG. 3 is a schematic view of a laser weld site of the header assembly construction provided by the present invention;

FIG. 4 is a schematic view of a docking structure of the header assembly structure provided by the present invention;

fig. 5 is a schematic structural view of an aluminum block of the top cover assembly structure provided by the present invention.

Description of reference numerals:

1, polishing an aluminum sheet; 101 a first via hole; 2, a limiting structure, 201 placing grooves and 202 fourth through holes; 3, an aluminum block, 301 a second through hole and 302 a table board; 4, sealing rings; 5 base, 501 third through hole; 6, a butt joint structure; 6a pole, 6b riveting copper ring; 6a-1 butt joint groove, 6a-2 limit bottom block, 6b-1 step part and 6b-2 butt joint part; 7, welding a molten pool by copper laser; 8 copper aluminum laser welding pool.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 5, an embodiment of the present invention includes: a novel top cover assembly structure for a lithium ion cell comprises a smooth aluminum sheet 1, an aluminum block 3 and a butt joint structure 6, wherein the smooth aluminum sheet 1 is provided with a first through hole 101; the aluminum block 3 is provided with a second through hole 301 corresponding to the first through hole 101; the butt joint structure 6 at least comprises a pole 6a and a riveting copper ring 6b, wherein the pole 6a sequentially penetrates through the first through hole 101 and the second through hole 301 and is connected with the riveting copper ring 6 b; the caulking copper ring 6b is fitted into the second through hole 301 and connected to the aluminum block 3.

In this embodiment, the riveting copper ring 6b, the pole 6a, and the aluminum block 3 are connected by riveting. The aluminum block 3 is formed by punching, the riveting copper ring 6b is formed by punching a copper plate, and the pole 6a is manufactured by machining a copper material. During riveting, the aluminum block 3, the pole 6a and the riveting copper ring 6b are assembled in the above sequence, and in the riveting process, the three are riveted and fixed in a riveting mode, so that the three are tightly matched.

In the embodiment, the joint of the riveting copper ring 6b and the pole 6a is fused by laser welding, namely a copper laser welding pool 7 is formed at the joint; the joint of the riveting copper ring 6b and the aluminum block 3 is fused by laser welding, namely a copper-aluminum laser welding pool 8 is formed at the joint.

Specifically, after the three components are riveted and connected, laser welding is further carried out, so that the assembled joint is fused by welding. The purpose of laser welding is that although the three parts are connected by riveting, the internal resistance of the structure is larger, and laser welding can further fuse and connect the three parts, thereby reducing the internal resistance.

In this embodiment, the novel cap assembly structure for a lithium ion battery cell further includes a base 5 disposed below the polished aluminum sheet 1, and the base 5 is provided with a third through hole 501 for passing the pole 6 a; the lower end part of the pole 6a is provided with a limit bottom block 6a-2 matched with the base 5, so that when the pole 6a passes through the third through hole 501, the limit bottom block 6a-2 is clamped on the lower end surface of the base 5.

In the embodiment, the upper end of the riveting copper ring 6b is provided with a step part 6b-1 protruding outwards, the step part 6b-1 is configured to be matched with the aluminum block 3, and when the riveting copper ring 6b is in butt-joint fit with the pole 6a, the step part 6b-1 rests on the aluminum block 3.

In this embodiment, a mesa for placing the stepped portion 6b-1 of the riveting copper ring is arranged in the second through hole 301 of the aluminum block 3; the step portion 6b-1 has a circular shape.

In this embodiment, the terminal post 6a is provided with a circle of abutting grooves 6a-1 which are recessed inwards relative to the side wall surface, and the inner side of the lower end of the riveting copper ring 6b is provided with an abutting portion 6b-2 which is matched with the abutting grooves 6a-1 of the terminal post 6a, so that the riveting copper ring 6b and the terminal post 6a are buckled to form the abutting structure 6.

In this embodiment, the novel top cap assembly structure for the lithium ion battery cell further includes a limiting structure 2, the limiting structure 2 is provided with a placing groove 201 for placing the aluminum block 3, the placing groove 201 is provided with a fourth through hole 202 corresponding to the second through hole 301 of the aluminum block 3, and the fourth through hole 202 is used for the pole 6a to pass through.

In this embodiment, novel top cap subassembly structure for lithium ion cell still includes sealing washer 4, 4 covers of sealing washer are established on utmost point post 6a, and sealing washer 4 is close to the one end and the cooperation of light aluminum sheet 1 and is connected.

In this embodiment, the base 5 and the limiting structure 2 are made of plastic.

In this embodiment, the thickness of the riveting copper ring 6b is 0.5mm, and the thickness of the weak part of the riveting copper ring 6b after riveting is 0.3 mm. The riveting copper ring 6b and the pole 6a are preferably in a Cu T2O state, the aluminum block 3 is preferably in an Al 1060O state, the laser welding penetration at the copper laser welding pool 7 is preferably not less than 0.5mm, and the laser welding penetration at the copper aluminum laser welding pool 8 is preferably not less than 0.5 mm. It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.