Electrode terminal, cover assembly and battery

Patent metadata

Field	Value
Publication number	US-10109839-B2
Application number	US-201314134984-A
Country	US
Kind code	B2
Filing date	Dec 19, 2013
Priority date	Jun 28, 2011
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

An electrode terminal, a cover assembly and a battery comprising the cover assembly are provided. The electrode terminal comprises: a terminal pole portion, and a pole cap portion formed on an end of the terminal pole portion, and a buffering structure disposed on a surface of the pole cap portion facing to the terminal pole portion.

First claim

What is claimed is:

1. An electrode terminal, the electrode terminal being a part of a cover assembly, comprising:
a terminal pole portion including a first end and a second end opposite to the first end;
a sealing member including a central hole;
a pole cap portion integrally formed on the second end of the terminal pole portion and having a first surface facing the terminal portion; and
a buffering structure that protrudes from the first surface of the pole cap portion to be in contact with the sealing member and physically separates the first surface of the pole cap portion from the sealing member such that the first surface is spaced apart from the sealing member, the buffering structure being spaced apart from the terminal pole portion,
wherein the terminal pole portion penetrates through the sealing member such that the terminal pole portion is in contact with the sealing member.

2. The electrode terminal according to claim 1 , wherein the buffering structure and the pole cap portion are integrally formed.

3. The electrode terminal according to claim 1 , wherein the buffering structure includes a support damping ring formed on the surface of the pole cap portion.

4. The electrode terminal according to claim 3 , wherein an inner diameter of the support damping ring is equal to or larger than an outer diameter of the pole cap portion.

5. The electrode terminal according to claim 3 , wherein an outer diameter of the support damping ring is smaller than an outer diameter of the pole cap portion.

6. The electrode terminal according to claim 1 , wherein the pole cap portion is a cylinder which has a height larger than about one-fourth the height of the terminal pole portion and smaller than about half the height of the terminal pole portion.

7. The electrode terminal according to claim 6 , wherein a first chamfer is formed at a periphery of an external peripheral surface of the pole cap portion.

8. The electrode terminal according to claim 1 , wherein the terminal pole portion comprises:
a first pole part in contact with the pole cap portion; and
a second pole part fixedly connected with the first pole part and having an outer diameter smaller than that of the first pole part.

9. The electrode terminal of claim 1 , wherein a surface of the protruding portion of the buffering structure is welded to a surface of the sealing member.

Assignees

• Shenzhen Byd Auto R&D Co Ltd
• Byd Co Ltd

Inventors

• Deng Qisi
• Wang Lujian
• He Yuchen
• Wu Qiang

Classifications

• H01M50/186 Primary

  characterised by the disposition of the sealing members · CPC title

• H01M50/55

  on the same side of the cell · CPC title

• H01M50/103

  prismatic or rectangular (H01M50/109, H01M50/11 take precedence) · CPC title

• H01M50/176

  for prismatic or rectangular cells (H01M50/181 takes precedence) · CPC title

• H01M50/553

  Terminals adapted for prismatic, pouch or rectangular cells · CPC title