Secondary battery

Patent metadata

Field	Value
Publication number	US-2017155097-A1
Application number	US-201615363316-A
Country	US
Kind code	A1
Filing date	Nov 29, 2016
Priority date	Nov 30, 2015
Publication date	Jun 1, 2017
Grant date	—

Abstract

A secondary battery includes an electrode assembly including an electrode tab with a buffer, a case to accommodate the electrode assembly, and an insulator between the electrode assembly and the case.

First claim

What is claimed is:

1 . A secondary battery, comprising:
an electrode assembly including an electrode tab with a buffer; a case to accommodate the electrode assembly; and an insulator between the electrode assembly and the case.

2 . The secondary battery as claimed in claim 1 , wherein the insulator is attached to an outer peripheral surface of the electrode assembly.

3 . The secondary battery as claimed in claim 1 , wherein:
the insulator is attached to a surface of the electrode assembly and a surface of the case, and the surfaces of the electrode assembly and the case face each other.

4 . The secondary battery as claimed in claim 1 , wherein the insulator is in a lower portion of the electrode assembly opposite to the electrode tab.

5 . The secondary battery as claimed in claim 1 , wherein the insulator includes tape that turns into an adhesive based on a reaction with an electrolyte.

6 . The secondary battery as claimed in claim 1 , wherein the buffer contracts and extends in a direction of the electrode tab that extends between a first end of the electrode tab fixed to the electrode assembly and a second end of the electrode tab fixed to a cap plate.

7 . The secondary battery as claimed in claim 6 , wherein:
the electrode tab includes a bent portion between the first end and the second end, and the buffer is between the first end and the bent portion.

8 . The secondary battery as claimed in claim 1 , wherein the buffer has a first surface that is concave and a second surface that is convex.

9 . The secondary battery as claimed in claim 8 , wherein the first and second surfaces of the buffer are round.

10 . The secondary battery as claimed in claim 8 , wherein the first and second surfaces of the buffer are bent form of a wedge.

11 . The secondary battery as claimed in claim 1 , wherein the buffer is a pressed buffer.

12 . The secondary battery as claimed in claim 11 , wherein the buffer does not have overlapping portions in a projecting direction of the electrode tab.

13 . The secondary battery as claimed in claim 1 , wherein:
the electrode tab includes a first electrode tab and a second electrode tab having different polarities, and the first electrode tab and the second electrode tab respectively include a plurality of first electrode tabs and a plurality of second electrode tabs.

14 . The secondary battery as claimed in claim 1 , further comprising:
a cap plate to seal the case accommodating the electrode assembly; and an insulating spacer between the electrode assembly and the cap plate.

15 . The secondary battery as claimed in claim 14 , wherein the insulating spacer includes a thin plate or insulating tape including a polymer insulating material.

16 . The secondary battery as claimed in claim 14 , wherein the insulating spacer includes two tab holes into which a plurality of first electrode tabs and a plurality of second electrode tabs are respectively inserted and gathered as a group.

17 . The secondary battery as claimed in claim 1 , further comprising:
a cap plate to seal the case accommodating the electrode assembly, wherein the electrode assembly and the cap plate are directly exposed to one another.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Kang Seon Yeong
• Yoon Jang Ho

Classifications

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M50/486 Primary

  Organic material · CPC title

• H01M50/477

  characterised by their shape · CPC title

• H01M50/474

  characterised by their position inside the cells · CPC title

• H01M50/593

  Spacers; Insulating plates · CPC title