Secondary battery

Patent metadata

Field	Value
Publication number	US-9525162-B2
Application number	US-201514633302-A
Country	US
Kind code	B2
Filing date	Feb 27, 2015
Priority date	Nov 3, 2014
Publication date	Dec 20, 2016
Grant date	Dec 20, 2016

Abstract

A secondary battery, including an electrode assembly; a cap plate that seals the electrode assembly; an electrode pin electrically connected to the electrode assembly and on the cap plate with an insulating gasket therebetween; and a first lead tab coupled to the electrode pin, a relative ratio W 2 /W 1 of a width W 2 of the insulating gasket to a width W 1 of the first lead tab satisfying 1.0<W 2 /W 1 <1.14.

First claim

What is claimed is:

1. A secondary battery, comprising:
an electrode assembly;
a cap plate that seals the electrode assembly;
an electrode pin electrically connected to the electrode assembly and on the cap plate with an insulating gasket therebetween; and
a first lead tab coupled to the electrode pin,
a relative ratio W 2 /W 1 of a width W 2 of the insulating gasket to a width W 1 of the first lead tab satisfying
1.0< W 2/ W 1<1.14.

2. The secondary battery as claimed in claim 1 , wherein the first lead tab includes an upper section coupled to the electrode pin and a lower section extending downward from the upper section toward the cap plate in a stepwise manner.

3. The secondary battery as claimed in claim 2 , wherein the upper section extends beyond the insulating gasket.

4. The secondary battery as claimed in claim 3 , wherein an extension length L from the insulating gasket to an end of the upper section satisfies
0.50 mm< L< 1.00 mm.

5. The secondary battery as claimed in claim 4 , wherein the end of the upper section corresponds to an inflection point where the upper section begins to be bent toward the lower section.

6. The secondary battery as claimed in claim 2 , wherein the lower section is electrically connected to a temperature sensor.

7. The secondary battery as claimed in claim 6 , wherein the lower section and the temperature sensor are in area-contact with a support surface.

8. The secondary battery as claimed in claim 7 , wherein the support surface is a top surface of an insulating member attached to the cap plate.

9. The secondary battery as claimed in claim 7 , wherein:
the temperature sensor includes a first lead spaced apart from the support surface, and
the lower section is between the first lead and the support surface.

10. The secondary battery as claimed in claim 9 , wherein:
the temperature sensor includes a second lead opposite the first lead and spaced apart from the support surface, and
a second lead tab is between the second lead and the support surface.

11. The secondary battery as claimed in claim 10 , wherein the temperature sensor and the second lead tab are in area-contact with the support surface.

12. The secondary battery as claimed in claim 11 , wherein the support surface is a top surface of an insulating member attached to the cap plate.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Kim Jaemin
• Moon Daeyon

Classifications

• H01M10/486 Primary

  for measuring temperature · CPC title

• H01M50/593

  Spacers; Insulating plates · CPC title

• H01M50/566

  by welding, soldering or brazing · CPC title

• H01M50/553

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

• H01M50/562

  characterised by the material · CPC title