Rechargeable battery

Patent metadata

Field	Value
Publication number	US-9570780-B2
Application number	US-201313936332-A
Country	US
Kind code	B2
Filing date	Jul 8, 2013
Priority date	Feb 21, 2013
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

A rechargeable battery including an electrode assembly including a first and second electrode, and a separator interposed between the first and second electrode; a case receiving the electrode assembly and having a top end opening; a cap assembly sealing the top end opening of the case, the cap assembly including a first terminal part and a second terminal part outwardly protruding; and a first collector plate received inside the case and electrically connecting the first electrode and the first terminal part, wherein the first collector plate includes a first lead part including a first electrode connection part connected to the first electrode, a first terminal connection part connected to the first terminal part, and a first connecting part electrically connecting the first electrode connection part and the first terminal connection part; and a first resin part on the first lead part, the first resin part covering the first connecting part.

First claim

What is claimed is:

1. A rechargeable battery, comprising:
an electrode assembly including a first electrode, a second electrode, and a separator interposed between the first electrode and the second electrode;
a case receiving the electrode assembly therein and having a top end opening;
a cap assembly sealing the top end opening of the case, the cap assembly including a first terminal part and a second terminal part outwardly protruding; and
a first collector plate received inside the case and electrically connecting the first electrode and the first terminal part,
wherein the first collector plate includes:
a first lead part including a first electrode connection part connected to the first electrode, a first terminal connection part connected to the first terminal part, and a first connecting part electrically connecting the first electrode connection part and the first terminal connection part, the first connecting part extending from a top portion of the first electrode connection part and having a bend so as to have an extending part that extends toward an upper portion of the electrode assembly; and
a first resin part on the first lead part, the first resin part covering all sides of the first connecting part, covering a portion of the first electrode connection part, and extending beyond the bend to cover the extending part.

2. The rechargeable battery as claimed in claim 1 , wherein the first resin part is insert-molded to the first lead part to be integrally engaged with the first lead part, and conformally covers a portion of the first lead part, the bend, and the extending part.

3. The rechargeable battery as claimed in claim 1 , wherein the first resin part is made of one of polypropylene and perfluorinated acid.

4. The rechargeable battery as claimed in claim 1 , wherein the first connecting part has one side connected to the first electrode connection part and another side connected to the first terminal connection part.

5. The rechargeable battery as claimed in claim 1 , wherein the first connecting part includes a fuse region, the fuse region having a smaller sectional area than other regions of the first connecting part.

6. The rechargeable battery as claimed in claim 5 , wherein the fuse region is positioned inside the first resin part such that all sides of the fuse region are conformally covered by the first resin part.

7. The rechargeable battery as claimed in claim 5 , wherein the fuse region is positioned at one side of the first connecting part connected to the first terminal connection part and has a fuse hole formed therein.

8. The rechargeable battery as claimed in claim 1 , wherein the first resin part is insert-molded to the first lead part that is engaged with a first fastening terminal of the first terminal part, the first resin part conformally covering the first connecting part and the first terminal connection part.

9. The rechargeable battery as claimed in claim 1 , further comprising a second collector plate received inside the case, the second collector plate electrically connecting the second electrode and the second terminal part.

10. The rechargeable battery as claimed in claim 9 , wherein the second collector plate includes:
a second lead part including a second electrode connection part connected to the second electrode, a second terminal connection part connected to the second terminal part, and a second connecting part electrically connecting the second electrode connection part and the second terminal connection part; and
a second resin part on the second lead part, the second resin part covering the second connecting part.

11. The rechargeable battery as claimed in claim 10 , wherein the second resin part is insert-molded to the second lead part to be integrally engaged with the second lead part.

12. The rechargeable battery as claimed in claim 10 , wherein the second resin part is made of one of polypropylene and perfluorinated acid.

13. The rechargeable battery as claimed in claim 10 , wherein the second connecting part has one side connected to the second electrode connection part and another side connected to the second terminal connection part, the second connecting part extending from a top portion of the second electrode connection part to then be bent toward an upper portion of the electrode assembly.

14. The rechargeable battery as claimed in claim 10 , wherein the second resin part is insert-molded to the second lead part that is engaged with a second fastening terminal of the second terminal part, the second resin part covering the second connecting part and the second terminal connection part.

15. The rechargeable battery as claimed in claim 1 , wherein the cap assembly includes:
a cap plate sealing the case; and
a vent plate in the cap plate, the vent plate being configured to be opened when an internal pressure of the case exceeds a preset pressure.

16. The rechargeable battery as claimed in claim 15 , further comprising:
a first short-circuit plate on a short-circuit hole in the cap plate, the first short-circuit plate being electrically connected to the cap plate and upwardly convexly protruding when the internal pressure of the case exceeds a preset pressure; and
a second short-circuit plate upwardly spaced apart from the first short-circuit plate and being electrically connected to the second terminal part.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Byun Sangwon
• Koo Minseok

Classifications

• H01M2200/103

  Fuse · CPC title

• H01M10/0587

  of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators · CPC title

• H01M4/667

  in the form of layers, e.g. coatings · CPC title

• H01M10/0585

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M10/4257 Primary

  Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries · CPC title