Rechargeable battery

Patent metadata

Field	Value
Publication number	US-9692022-B2
Application number	US-201514860567-A
Country	US
Kind code	B2
Filing date	Sep 21, 2015
Priority date	Mar 2, 2015
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

A rechargeable battery that reduces a production cost by reducing a number of processes of a case is provided. The rechargeable battery includes: a case that houses an electrode assembly; a cap plate that is coupled to an opening of the case; and an electrode terminal that is electrically connected to the electrode assembly to be provided in the cap plate, wherein the cap plate has an inclined portion at a side surface of an outer edge and a modified groove at a corner of an outer surface and is coupled to the opening with the inclined portion while the modified groove becomes narrow.

First claim

What is claimed is:

1. A rechargeable battery, comprising:
a case that houses an electrode assembly;
a cap plate that is coupled to an opening of the case; and
an electrode terminal that is electrically connected to the electrode assembly to be provided in the cap plate,
wherein the cap plate has an inclined portion at a side surface of an outer edge and a modified groove at a corner of an outer surface and is coupled to the opening with the inclined portion so that the modified groove has an inclined inner wall that corresponds to the inclined surface of the cap plate.

2. The rechargeable battery of claim 1 , wherein the modified groove is provided at four locations of a quadrangle corner of the cap plate.

3. The rechargeable battery of claim 1 , wherein the modified groove forms a greater groove gap at the center of the corner, forms a smaller groove gap at both sides, and gradually reduces a groove gap while advancing to both sides from the center, before coupling.

4. The rechargeable battery of claim 3 , wherein the cap plate further comprises a protruding portion corresponding to the groove gap at an outer edge of the modified groove.

5. The rechargeable battery of claim 4 , wherein the protruding portion is inserted into an opening of the case so that the modified groove becomes narrow.

6. The rechargeable battery of claim 5 , wherein the opening of the case has a corresponding modified inclined surface that is obliquely modified to correspond to the inclined portion.

7. The rechargeable battery of claim 1 , wherein the modified groove comprises:
a first internal side wall and second internal side wall that are formed opposite at the inside and the outside at the outer surface; and
a bottom portion that connects the bottom of the first internal side wall and the second internal side wall.

8. The rechargeable battery of claim 7 , wherein the inclined portion forms a first inclined portion that is produced in a straight line and that is bent to correspond to an intersection of the first internal side wall and the bottom portion when coupling to the opening to closely contact the opening and a second inclined portion that is bending-connected to the first inclined portion to be separated from the opening.

9. The rechargeable battery of claim 1 , wherein the inclined portion is formed at an entire side surface of an outer edge of the cap plate.

10. The rechargeable battery of claim 9 , wherein the modified groove is formed along an entire circumference of the outer surface.

11. The rechargeable battery of claim 10 , wherein the opening of the case has a corresponding modified inclined surface that is obliquely modified to correspond to the inclined portion.

12. The rechargeable battery of claim 11 , wherein the corresponding modified inclined surface is formed along an entire circumference of the opening.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Lee Chi-Young
• Jang Myung-Jae

Classifications

• H01M50/15 Primary

  for prismatic or rectangular cells (H01M50/153 takes precedence) · CPC title

• H01M50/103 Primary

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

• H01M50/119

  Metals · CPC title

• H01M50/543

  Terminals · CPC title

• H01M50/169 Primary

  by welding, brazing or soldering · CPC title