CN216563448U

CN216563448U - Pole lug structure for lithium battery

Info

Publication number: CN216563448U
Application number: CN202123220380.4U
Authority: CN
Inventors: 朱伟
Original assignee: Shenzhen Xizhuo Electronics Co ltd
Current assignee: Shenzhen Xizhuo Electronics Co ltd
Priority date: 2021-12-20
Filing date: 2021-12-20
Publication date: 2022-05-17
Anticipated expiration: 2031-12-20

Abstract

The utility model provides a pole lug structure for a lithium battery, which comprises a pole lug body and a pole lug glue arranged on the pole lug body; the wall surface of the lug body, which is far away from the outer connection end, is provided with a plurality of welding positions, each welding position comprises a plurality of first through holes distributed in a circumferential array manner, a plurality of second through holes are arranged in the interval area of the first through holes, and the second through holes are distributed in a radial manner from the array circle center of the first through holes; the first through hole and the second through hole are communicated through a pressure groove network; the tin liquid welding device is novel in structure, the flow of tin liquid at the welding position can be facilitated, the solidification adhesion area is increased, the welding effect is improved, and loosening is prevented.

Description

Pole lug structure for lithium battery

Technical Field

The utility model relates to the field of tabs, in particular to a tab structure for a lithium battery.

Background

The lithium battery has the characteristics of high specific energy, low self-discharge rate, good high-low temperature performance, long charge-discharge service life, no memory effect and the like. The method is widely applied to products such as mobile phones, notebook computers, digital cameras, electric vehicles, electric tools, new energy automobiles and the like. At present, one end of a tab of a lithium battery is welded at one end of a pole piece, and is placed in a cylindrical battery shell after being wound, and the other end of the tab is exposed outside and serves as an external connection end; most of the conventional lugs are of smooth structures, the pole pieces are of smooth structures, the tin liquor flowability at welding positions is not strong, the solidification and adhesion effects are poor, the problem of loosening can occur, and subsequent processing is influenced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a tab structure for a lithium battery, which is novel in structure, the welding part can facilitate the flow of molten tin, the solidification adhesion area is increased, the welding effect is improved, and the loosening is prevented.

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

the utility model provides a tab structure for a lithium battery, which comprises a tab body and tab glue arranged on the tab body; the wall surface of the lug body, which is far away from the outer connection end, is provided with a plurality of welding positions, each welding position comprises a plurality of first through holes distributed in a circumferential array manner, a plurality of second through holes are arranged in the interval area of the first through holes, and the second through holes are distributed in a radial manner from the array circle center of the first through holes; the first through hole and the second through hole are communicated through a pressure groove network.

In a preferred technical scheme of the utility model, the tab body comprises a first tab piece and a second tab piece which are connected, the width of the first tab piece is smaller than that of the second tab piece, and tab glue is arranged at the joint of the first tab piece and the second tab piece to coat the joint; the welding position is arranged on the wall surface of the second pole lug piece far away from the pole lug glue.

In a preferred embodiment of the present invention, the number of the welding positions is 6, and the welding positions are distributed in a rectangular array.

In a preferred technical scheme of the utility model, the first through holes are of a fan-shaped structure, the number of the first through holes is 6, and the six first through holes are distributed in a circular array to form a circular ring-shaped outline area; the second through holes are distributed and diffused outwards through the gap area between every two adjacent first through holes.

In a better technical scheme of the utility model, two sides of the end part of the second lug piece close to the first lug piece are provided with first caulking positions, and the middle position of the end part of the first lug piece close to the second lug piece is provided with a second caulking position; the first glue embedding position and the second glue embedding position are both located inside the tab glue.

In a preferred technical scheme of the utility model, the first caulking position and the second caulking position have the same structure as the welding position, and the same equipment is used for processing the through hole and the indentation.

In a preferred technical scheme of the utility model, two ends of the welding position, the first embedding glue position and the second embedding glue position are respectively provided with a pressure groove net.

In a preferred technical scheme of the utility model, the groove pressing net comprises an arc-shaped pressing groove and a linear pressing groove, the second through holes distributed in a radial shape are communicated through the linear pressing groove, and two adjacent first through holes are communicated with the second through holes between the two first through holes through the arc-shaped pressing groove.

The utility model has the beneficial effects that:

the lug structure for the lithium battery is novel in structure, the lug body is provided with a plurality of welding positions, the welding positions are provided with a plurality of first through holes and a plurality of second through holes, and the first through holes and the second through holes are communicated through the groove network, so that tin liquid can flow conveniently, the solidification adhesion area is increased, the welding effect is improved, and loosening is prevented; moreover, the first through hole and the second through hole are of a perforated structure, so that the increase of soldering tin can be facilitated, and the welding processing is further facilitated.

Drawings

Fig. 1 is a schematic structural diagram of a tab structure for a lithium battery provided in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a weld site provided in an embodiment of the present invention;

fig. 3 is a schematic view illustrating an internal structure of a tab structure for a lithium battery according to an embodiment of the present invention;

fig. 4 is a schematic usage diagram of a tab structure for a lithium battery according to an embodiment of the present invention.

In the figure:

100. a tab body; 110. a first pole tab; 120. a second pole tab; 200. gluing a tab; 300. welding positions; 310. a first through hole; 320. a second through hole; 330. a groove pressing net; 331. an arc-shaped pressing groove; 332. linear groove pressing; 410. a first glue embedding position; 420. a second glue embedding position; 500. and (6) pole pieces.

Detailed Description

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 1 to 4, in an embodiment of the present invention, a tab structure for a lithium battery is disclosed, including a tab body 100, a tab glue 200 disposed on the tab body 100; the wall surface of the tab body 100 far away from the outer connection end is provided with a plurality of welding positions 300, each welding position 300 comprises a plurality of first through holes 310 distributed in a circumferential array manner, a plurality of second through holes 320 are arranged in the interval area of the first through holes 310, and the second through holes 320 are distributed in a radial manner from the array circle center of the first through holes 310; the first through hole 310 and the second through hole 320 are communicated with each other through a groove network 330.

The tab structure for the lithium battery is novel in structure, the tab body is provided with the plurality of welding positions, the welding positions are provided with the plurality of first through holes and the plurality of second through holes, and the first through holes and the second through holes are communicated through the groove network, so that molten tin can flow conveniently, the solidification adhesion area is increased, the welding effect is improved, and loosening is prevented; moreover, the first through hole and the second through hole are of a perforated structure, so that the increase of soldering tin can be facilitated, and the welding processing is further facilitated; it should be noted that, a rough surface or a corresponding indentation may be disposed on the welding position of the pole piece 500, and the welding effect may also be further enhanced.

Further, the tab body 100 includes a first tab piece 110 and a second tab piece 120 connected to each other, the width of the first tab piece 110 is smaller than the width of the second tab piece 120, and the tab glue 200 is disposed at the joint of the first tab piece 110 and the second tab piece 120 to coat the joint; the welding position 300 is arranged on the wall surface of the second tab piece 120 far away from the tab glue 200; the structural design can ensure that a fall step position is formed between the first pole lug piece and the second pole lug piece, and the pole lug can be connected more stably when being coated with pole lug glue, thereby effectively preventing the pole lug glue from loosening.

Furthermore, the number of the welding positions 300 is 6, and the welding positions are distributed in a rectangular array, so that the flow area of the tin liquid can be further increased, the welding range is expanded, and the welding effect is improved.

Further, the first through holes 310 are in a fan-shaped structure, the number of the first through holes 310 is 6, and the sixth through holes 310 are distributed in a circular array to form a circular ring-shaped outline area; the second through holes 320 are distributed and diffused outwards through the gap area between two adjacent first through holes 310; the tin liquid can flow to the first through hole and the second through hole conveniently, the welding speed is accelerated, and the welding effect is improved.

Further, two sides of the end portion of the second pole tab 120 close to the first pole tab 110 are provided with first caulking positions 410, and the middle position of the end portion of the first pole tab 110 close to the second pole tab 120 is provided with a second caulking position 420; the first glue embedding position 410 and the second glue embedding position 420 are both positioned inside the tab glue 200; the first glue embedding position and the second glue embedding position are designed to further enhance the connection between the tab glue and the tab body and maintain stable connection; in addition, the distribution mode can maintain the connection strength of the first polar lug piece and the second polar lug piece, and prevent the fracture problem at the connection position.

Further, the first caulking position 410 and the second caulking position 420 have the same structure as the welding position 300, and are perforated and indented by the same equipment; the first glue embedding position and the second glue embedding position are provided with a first through hole and a second through hole which penetrate through the lug body, so that the flow of glue melting during the formation of the lug glue can be facilitated, and more stable connection can be carried out.

Furthermore, two ends of the welding position 300, the first caulking position 410 and the second caulking position 420 are provided with groove pressing nets; the two wall surface structures of the lug body are the same, the front surface and the back surface can be used, and welding operation is facilitated.

Further, the indent mesh 330 includes an arc indent 331 and a linear indent 332, the radially distributed second through holes 320 are communicated through the linear indent 332, and two adjacent first through holes 310 are communicated with the second through holes 320 therebetween through the arc indent 331; the first through hole and the second through hole are communicated through the pressure groove network, so that the flowing of tin liquor is further facilitated, the welding area of the pole lug and the pole piece is enlarged, and the welding quality is improved.

While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the utility model. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.

Claims

1. A tab structure for a lithium battery comprises a tab body and tab glue arranged on the tab body; the method is characterized in that:

the wall surface of the lug body, which is far away from the outer connection end, is provided with a plurality of welding positions, each welding position comprises a plurality of first through holes distributed in a circumferential array manner, a plurality of second through holes are arranged in the interval area of the first through holes, and the second through holes are distributed in a radial manner from the array circle center of the first through holes; the first through hole and the second through hole are communicated through a pressure groove network.

2. The tab structure for a lithium battery as claimed in claim 1, wherein:

the tab body comprises a first tab piece and a second tab piece which are connected, the width of the first tab piece is smaller than that of the second tab piece, and tab glue is arranged at the joint of the first tab piece and the second tab piece to coat the joint; the welding position is arranged on the wall surface of the second pole lug piece far away from the pole lug glue.

3. The tab structure for a lithium battery as claimed in claim 1, wherein:

the number of welding positions is 6, and the welding positions are distributed in a rectangular array.

4. The tab structure for a lithium battery as claimed in claim 1, wherein:

the number of the first through holes is 6, and the sixth through holes are distributed in a circular array to form a circular ring-shaped outline area; the second through holes are distributed and diffused outwards through the gap area between every two adjacent first through holes.

5. The tab structure for a lithium battery as claimed in claim 1, wherein:

the two sides of the end part of the second pole lug piece close to the first pole lug piece are provided with first glue embedding positions, and the middle position of the end part of the first pole lug piece close to the second pole lug piece is provided with a second glue embedding position; the first glue embedding position and the second glue embedding position are both located inside the tab glue.

6. The tab structure for a lithium battery as claimed in claim 5, wherein:

the first caulking position and the second caulking position have the same structure as the welding position, and a through hole and an indentation are processed by the same equipment.

7. The tab structure for a lithium battery as claimed in claim 6, wherein:

the two ends of the welding position, the first embedding glue position and the second embedding glue position are respectively provided with a pressure groove net.

8. The tab structure for a lithium battery as claimed in claim 1, wherein:

the indent net is including being arc indent and sharp indent, is through sharp indent intercommunication between the second through-hole that radially distributes, and adjacent two first through-holes, pass through arc indent intercommunication rather than the second through-hole between it.