Secondary battery

Patent metadata

Field	Value
Publication number	US-9722232-B2
Application number	US-201615247228-A
Country	US
Kind code	B2
Filing date	Aug 25, 2016
Priority date	Nov 3, 2014
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

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 inside a can;
a cap plate that seals the electrode assembly inside the can;
an electrode pin electrically connected to the electrode assembly, the electrode pin being on the cap plate outside the can, with an insulating gasket between the electrode pin and the cap plate, a portion of the insulating gasket surrounding the electrode pin on the cap plate; and
a first lead tab coupled to the electrode pin, the first lead tab including an upper section directly coupled to the electrode pin and extending in a first direction beyond the insulating gasket, and a lower section extending downward from an end of the upper section toward the cap plate in a stepwise manner,
an extension length L from the insulating gasket to the end of the upper section satisfying
0.50 mm<L<1.00 mm.

2. The secondary battery as claimed in claim 1 , wherein:
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.

3. The secondary battery as claimed in claim 1 , wherein the end of the upper section of the first lead tab corresponds to an inflection point where the upper section begins to be bent toward the lower section of the first lead tab.

4. The secondary battery as claimed in claim 1 , wherein the lower section of the first lead tab is electrically connected to a temperature sensor.

5. The secondary battery as claimed in claim 4 , wherein the lower section of the first lead tab and the temperature sensor are in area-contact with a support surface.

6. The secondary battery as claimed in claim 5 , wherein the support surface is a top surface of an insulating member attached to the cap plate.

7. The secondary battery as claimed in claim 5 , wherein:
the temperature sensor includes a first lead spaced apart from the support surface, and
the lower section of the first lead tab is between the first lead and the support surface.

8. The secondary battery as claimed in claim 7 , 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.

9. The secondary battery as claimed in claim 8 , wherein the temperature sensor and the second lead tab are in area-contact with the support surface.

10. The secondary battery as claimed in claim 9 , 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