CN217641692U

CN217641692U - Copper-aluminum composite negative pole column of lithium battery cover plate

Info

Publication number: CN217641692U
Application number: CN202221566694.1U
Authority: CN
Inventors: 陈先友; 周子轩; 陈文杰
Original assignee: Changshu Gaojia Energy Technology Co ltd
Current assignee: Changshu Gaojia Energy Technology Co ltd
Priority date: 2022-06-22
Filing date: 2022-06-22
Publication date: 2022-10-21
Anticipated expiration: 2032-06-22

Abstract

The utility model discloses a copper aluminium composite negative pole post of lithium cell apron, include: the negative pole post, the negative pole post includes interconnect's positive piece of utmost point post and the anti-face piece of utmost point post, the positive piece bottom surface of utmost point post is provided with first pressure riveting face, the anti-face top surface of utmost point post is provided with the second and presses riveting face, first pressure riveting face is provided with a plurality of salient points, be provided with a plurality ofly on the second pressure riveting face with the corresponding salient and concave point of salient and concave point, first pressure riveting face and second are pressed and are riveted the joining of surfaces back and pass through laser welding fixedly. In this way, the utility model provides a lithium cell cover plate's compound negative pole post of copper aluminium, two parts about falling into the negative pole post, aluminium returns aluminium, copper returns copper, and the interlock rewelding after the shape is stamped is good, and copper aluminium mainly leans on laser welding scar and occlusal surface overcurrent, greatly reduced cost.

Description

Copper-aluminum composite negative pole column of lithium battery cover plate

Technical Field

The utility model relates to a lithium battery cover plate field especially relates to a copper aluminium composite negative pole post of lithium battery cover plate.

Background

The lithium battery has the advantages of high voltage, long service life, high energy density, portability and the like, the application field of the lithium battery is continuously enlarged, but the safety performance of the lithium battery is poorer than that of other secondary batteries, when the power lithium battery is overcharged, the materials such as the internal electrolyte and the like can be cracked to generate gas, so that the battery shell is expanded and broken, oxygen enters to react with lithium ions accumulated on the surface of a negative electrode, and then the explosion occurs.

The existing negative pole column on the cover plate for the lithium battery shell is often made of copper-aluminum composite materials, such as the publication No. CN 215119048U with the patent name of a lithium battery explosion-proof cover plate capable of being assembled quickly.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves provides a copper aluminium composite negative pole post of lithium cell apron to solve the problem that exists among the background art.

In order to solve the technical problem, the utility model discloses a technical scheme be: the copper-aluminum composite negative pole column of the lithium battery cover plate comprises: the negative pole post, the negative pole post includes interconnect's positive piece of utmost point post and the anti-face piece of utmost point post, the positive piece bottom surface of utmost point post is provided with first pressure riveting face, the anti-face top surface of utmost point post is provided with the second and presses riveting face, first pressure riveting face is provided with a plurality of salient points, be provided with a plurality of salient and concave points corresponding with the salient and concave point on the second pressure riveting face, first pressure riveting face and second press riveting face interlock back through laser welding fixed connection, set up screw thread in utmost point post center on the negative pole post.

In a preferred embodiment of the present invention, the front surface of the terminal post is made of aluminum.

In a preferred embodiment of the present invention, the pole reverse member is made of copper.

In a preferred embodiment of the present invention, the side surface of the negative electrode pillar is provided with an insulating rubber coating.

In a preferred embodiment of the present invention, the bottom surface of the negative post is provided with a circle of laser welding stripes.

The utility model has the advantages that: the utility model provides a compound negative pole post of copper aluminium of lithium cell apron, two parts about falling into the negative pole post, aluminium returns aluminium, copper returns copper, and the interlock rewelding after the shape is stamped, copper aluminium mainly leans on laser welding scar and occlusal surface overcurrent, greatly reduced cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

fig. 1 is a schematic structural view of a preferred embodiment of a copper-aluminum composite negative electrode post of a lithium battery cover plate of the present invention;

FIG. 2 is a bottom view of FIG. 1;

fig. 3 is a schematic structural view of the pole front piece and the pole back piece.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-3, an embodiment of the present invention includes:

a copper-aluminum composite negative pole post of a lithium battery cover plate comprises: the cathode post 1, can set up or not set up utmost point post center internal screw thread 2 on the cathode post 1, in this embodiment, be provided with utmost point post center internal screw thread 2 on the cathode post 1, the side of cathode post 1 sets up insulating rubber coating 3.

The negative pole post 1 comprises a post front piece 4 and a post back piece 5 which are connected with each other, the post front piece 4 is made of aluminum, and the post back piece 5 is made of copper.

4 bottom surfaces of utmost point post positive piece are provided with first pressure riveting welded surface 6, 5 top surfaces of utmost point post anti-surface piece are provided with second pressure riveting welded surface 7, first pressure riveting welded surface 6 is provided with a plurality of concave-convex points 8, be provided with a plurality of convex-concave points 9 corresponding with concave-convex points 8 on the second pressure riveting welded surface 7, first pressure riveting welded surface 6 and second are pressed and are riveted 7 interlock back through laser welding fixed connection, 1 bottom surface of negative pole post is provided with round laser welding strip 10.

To sum up, the utility model provides a compound negative pole post of copper aluminium of lithium cell apron, two parts about falling into the negative pole post, aluminium returns aluminium, copper returns copper, and the interlock rewelding after the shape is stamped well, copper aluminium mainly leans on laser welding scar and occlusal surface overcurrent, greatly reduced cost.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, all included in the same way in the patent protection scope of the present invention.

Claims

1. A copper-aluminum composite negative pole post of a lithium battery cover plate comprises: the negative pole post, its characterized in that, the negative pole post includes interconnect's utmost point post front surface spare and utmost point post back surface spare, utmost point post front surface spare bottom surface is provided with first pressure riveting face of weld, utmost point post back surface spare top surface is provided with the second and presses riveting face of weld, first pressure riveting face of weld is provided with a plurality of concave-convex points, be provided with a plurality of convex-concave points corresponding with concave-convex point on the second pressure riveting face of weld, first pressure riveting face of weld and second press riveting face of weld after the interlock to pass through laser welding fixed connection, set up screw thread in the utmost point post center on the negative pole post.

2. The copper-aluminum composite negative pole of the lithium battery cover plate as recited in claim 1, wherein the material of the positive pole piece is aluminum.

3. The copper-aluminum composite negative pole of the lithium battery cover plate as recited in claim 1, wherein the material of the pole reverse piece is copper.

4. The copper-aluminum composite negative pole of the lithium battery cover plate as claimed in claim 1, wherein the side surface of the negative pole is provided with an insulating encapsulation.

5. The copper-aluminum composite negative pole of the lithium battery cover plate as claimed in claim 1, wherein the bottom surface of the negative pole is provided with a circle of laser welding stripes.