Rechargeable battery having fuse

Patent metadata

Field	Value
Publication number	US-9929397-B2
Application number	US-201514706912-A
Country	US
Kind code	B2
Filing date	May 7, 2015
Priority date	Aug 8, 2014
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

A rechargeable battery includes: an electrode assembly including a first electrode and a second electrode; a case for accommodating the electrode assembly; a first current collector coupled to the first electrode and including a fuse; and a second current collector coupled to the second electrode. First and second blocking members are positioned on the first current collector at a distance from each other with the fuse 10 interposed inbetween and each blocking member includes a nonconductor.

First claim

What is claimed is:

1. A rechargeable battery comprising:
an electrode assembly comprising a first electrode and a second electrode;
a case for accommodating the electrode assembly;
a first current collector coupled to the first electrode and comprising a fuse; and
a second current collector coupled to the second electrode, and
a first blocking member and a second blocking member each comprising a heat resistant polymer and spaced from each other and with the fuse interposed therebetween,
wherein the fuse is exposed to an outside of the first and second blocking members, the first current collector comprises an upper plate, and the fuse and first and second blocking members are resided at the upper plate; and
wherein the first and second blocking members have inner surfaces that enclose surfaces of the upper plate, and the inner surfaces further contact and cover surfaces of the upper plate.

2. The rechargeable battery of claim 1 , wherein the first current collector comprises a side plate extending at an angle from the upper plate toward the electrode assembly, and current collecting pieces extending from the side plate and bonded to the second electrode.

3. The rechargeable battery of claim 2 , wherein the upper plate comprises the fuse and a fuse opening is located at a center of the fuse.

4. The rechargeable battery of claim 2 , wherein the upper plate comprises the fuse and cutouts are located at opposite lateral ends of the fuse.

5. The rechargeable battery of claim 2 , wherein the first current collector further comprises a declining portion between the upper plate and the side plate that is downwardly inclined with respect to the upper plate, and the declining portion comprises the fuse.

6. The rechargeable battery of claim 5 , wherein the first and second blocking members are spaced from each other and with the declining portion interposed inbetween.

7. The rechargeable battery of claim 5 , wherein an upper part of the second blocking member is thicker than an upper part of the first blocking member.

8. The rechargeable battery of claim 5 , wherein the first and second blocking members comprise a polyimide.

9. The rechargeable battery of claim 1 , wherein the case is electrically coupled to the first electrode.

10. The rechargeable battery of claim 9 , wherein a cap plate is positioned at an opening of the case, and the cap plate comprises a short-circuit member that is configured to be deformed by increased internal pressure of the rechargeable battery and, when deformed, to electrically couple the first and second electrodes.

11. The rechargeable battery of claim 1 , wherein the first electrode comprises a first electrode uncoated region wherein an active material is not coated, the second electrode comprises a second electrode uncoated region wherein an active material is not coated, and the first and second electrode uncoated regions protrude in the same direction and are separated from each other.

12. The rechargeable battery of claim 11 , wherein the electrode assembly is wound with respect to a winding axis, and is positioned in the case in a direction parallel to the winding axis.

13. The rechargeable battery of claim 11 , wherein the first current collector comprises the upper plate, and an electrode attachment portion extending at an angle from the upper plate and directly bonded to the first electrode uncoated region.

14. The rechargeable battery of claim 1 , wherein the fuse comprises a vertical wall defining a fuse opening and wherein the first and the second blocking members contact an end of the vertical wall.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Byun Sang-Won
• Lee Won-Jun
• Lee Hong-Hyeon

Classifications

• H01M50/10

  Primary casings; Jackets or wrappings · CPC title

• H01M10/0431 Primary

  Cells with wound or folded electrodes (H01M10/045 takes precedence) · CPC title

• H01M50/581 Primary

  in response to temperature · CPC title

• H01M50/578

  in response to pressure · CPC title

• H01M50/572 Primary

  Means for preventing undesired use or discharge · CPC title