Secondary battery

Patent metadata

Field	Value
Publication number	US-9490468-B2
Application number	US-201213673082-A
Country	US
Kind code	B2
Filing date	Nov 9, 2012
Priority date	Apr 6, 2012
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

A secondary battery, including an electrode assembly including a first electrode plate, a second electrode plate, and a separator between the first and second electrode plates, a first collector electrically connected to the first electrode plate, and having a fuse region, a case accommodating the electrode assembly and the first collector, a cap plate coupled with the case, and having a short circuit hole, a first short circuit member in the short circuit hole, a second short circuit member spaced apart from a top surface of the cap plate and facing the first short circuit member, the second short circuit member being electrically connected to the second electrode plate, and an induction member inducing gas generated from inside the case to move to the first short circuit member.

First claim

What is claimed is:

1. A secondary battery, comprising:
an electrode assembly including a first electrode plate, a second electrode plate, and a separator between the first and second electrode plates;
a first collector electrically connected to the first electrode plate, and having a fuse region;
a case accommodating the electrode assembly and the first collector;
a cap plate coupled with the case, and having a short circuit hole;
a first short circuit member in the short circuit hole;
a second short circuit member spaced apart from a top surface of the cap plate and facing the first short circuit member, the second short circuit member being electrically connected to the second electrode plate; and
an induction member inducing substantially all gas generated from the fuse region to move to the first short circuit member by being directly connected to the first collector,
wherein:
the induction member includes a first opening at a first side thereof,
the fuse region includes an opening in the first collector, and
the opening of the fuse region opens only into the first opening of the induction member.

2. The secondary battery as claimed in claim 1 , wherein:
the induction member includes a second opening at a second side of the induction member, and
the induction member is provided in a duct form.

3. The secondary battery as claimed in claim 2 , wherein the first side of the induction member is directly connected to the first collector such that the first opening is oriented to the fuse region.

4. The secondary battery as claimed in claim 2 , wherein the second opening at the second side of the induction member is oriented to the first short circuit member, and is spaced apart from the first short circuit member and a bottom surface of the cap plate.

5. The secondary battery as claimed in claim 4 , wherein the second side of the induction member protrudes toward the first short circuit member.

6. The secondary battery as claimed in claim 2 , wherein:
the second side of the induction member protrudes such that the second opening is oriented to the first short circuit member, and is directly connected to a bottom surface of the cap plate, and
a projection part of the second side includes at least one third opening communicating with an inner space of the case.

7. The secondary battery as claimed in claim 1 , wherein the fuse region has a smaller cross sectional width than a cross sectional width of other regions of the first collector.

8. The secondary battery as claimed in claim 1 , wherein the first short circuit member is spaced from the second short circuit member such that, when a pressure greater than a preset pressure is applied to the first short circuit member, the first short circuit member electrically contacts the second short circuit member.

9. The secondary battery as claimed in claim 1 , wherein the first electrode plate is electrically connected to the case and the first short circuit member.

10. A secondary battery, comprising:
a case;
an electrode assembly in the case, the electrode assembly including a first electrode, a second electrode, and a separator between the first and second electrodes;
a collector having a fuse region;
a cap plate coupled with the case, the cap plate having a short circuit hole;
a first short circuit member in the short circuit hole, the first short circuit member electrically connected to the first electrode;
a second short circuit member spaced from the first short circuit member, the second short circuit member electrically connected to the second electrode; and
an induction member inducing substantially all gas generated from the fuse region to move to the first short circuit member by being directly connected to the collector,
wherein:
the induction member includes a first opening at a first side thereof,
the fuse region includes an opening in the collector, and
the opening of the fuse region opens only into the first opening of the induction member.

11. The secondary battery as claimed in claim 10 , wherein the induction member has the form of a duct with the first opening and a second opening.

12. The secondary battery as claimed in claim 11 , wherein the collector is electrically connected to the first or second electrodes, wherein the first opening is oriented to receive substantially all gas generated in the fuse region.

13. The secondary battery as claimed in claim 12 , wherein the second opening is oriented to direct substantially all gas carried by the duct toward the first short circuit member, the second opening being spaced apart from the first short circuit member and a bottom surface of the cap plate.

14. The secondary battery as claimed in claim 13 , wherein the second opening is located on a protrusion of the induction member, the protrusion protruding toward the first short circuit member.

15. The secondary battery as claimed in claim 12 , wherein:
the second opening is oriented to direct substantially all gas carried by the duct toward the first short circuit member, the second opening being located on a protrusion of the induction member, and
the protrusion is directly connected to a bottom surface of the cap plate and includes a third opening communicating with an inner space of the case.

16. The secondary battery as claimed in claim 10 , wherein the first short circuit member is spaced from the second short circuit member such that, when a pressure applied to the first short circuit member is greater than a preset pressure, the first short circuit member electrically contacts the second short circuit member.

17. A secondary battery, comprising:
an electrode assembly including a first electrode plate, a second electrode plate, and a separator between the first and second electrode plates;
a first collector electrically connected to the first electrode plate, and having a fuse region;
a case accommodating the electrode assembly and the first collector;
a cap plate coupled with the case, and having a short circuit hole;
a first short circuit member in the short circuit hole;
a second short circuit member spaced apart from a top surface of the cap plate and facing the first short circuit member, the second short circuit member being electrically connected to the second electrode plate; and
an induction member inducing gas generated from the fuse region to move to the first short circuit member, the induction member including a first opening at a first side of the induction member and a second opening at a second side of the induction member, the first side of the induction member being directly connected to the first collector such that the first opening directly underlies the fuse region,
wherein:
the fuse region includes an opening in the first collector, and
the opening of the fuse region opens only into the first opening of the induction member.

18. The secondary battery as claimed in claim 1 , wherein the induction member induces a localized increase in pressure at the first short circuit member in response to melting of the fuse region.

Assignees

• Byun Sangwon
• Yoon Haekwon
• Han Minyeol
• Samsung Sdi Co Ltd
• Bosch Gmbh Robert

Inventors

• Byun Sangwon
• Yoon Haekwon
• Han Minyeol

Classifications

• H01M10/42 Primary

  Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells (H01M10/60 takes precedence) · CPC title

• H01M50/553

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

• H01M50/55

  on the same side of the cell · CPC title

• H01M50/583

  in response to current, e.g. fuses · CPC title

• H01M50/533

  characterised by the shape of the leads or tabs · CPC title