Rechargeable battery

Patent metadata

Field	Value
Publication number	US-9343772-B2
Application number	US-201113207250-A
Country	US
Kind code	B2
Filing date	Aug 10, 2011
Priority date	Oct 8, 2010
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

A rechargeable battery includes an electrode assembly undergoing charging and discharging, a pressurization holder covering the electrode assembly and fixing the electrode assembly, a positive terminal and a negative terminal electrically connected to the electrode assembly, and a case accommodating the electrode assembly and the pressurization holder in a state in which the positive terminal and the negative terminal protrude from the case.

First claim

What is claimed is:

1. A secondary battery comprising:
an electrode assembly;
a pressurization holder encompassing the electrode assembly, the pressurization holder comprising a plurality of side walls connected by a connector, each side wall having an exterior-facing surface and an interior-facing surface, wherein the exterior-facing surface has a buffer recess and a plurality of protrusions protruding from the buffer recess wherein the plurality of the protrusions protrude by less than a depth of the buffer recess; and
a case housing the electrode assembly and the pressurization holder.

2. The secondary battery of claim 1 , wherein a portion of the side wall is rounded to protrude toward the electrode assembly.

3. The secondary battery of claim 2 , wherein the portion is arc-shaped along at least one of a longitudinal direction or a lateral direction of the side wall.

4. The secondary battery of claim 1 , wherein the pressurization holder is spaced from at least one of the case or the electrode assembly at the buffer recess.

5. The secondary battery of claim 1 , wherein the buffer recess has a planar surface that is parallel to one of the interior-facing surface or the exterior-facing surface.

6. The secondary battery of claim 1 , the exterior facing surface includes a reinforcing member comprising a plurality of ribs.

7. The secondary battery of claim 6 , wherein the ribs are arranged to intersect each other.

8. The secondary battery of claim 1 , wherein the connector is substantially perpendicular to each of opposing side walls.

9. The secondary battery of claim 1 , wherein the connector is arc-shaped.

10. The secondary battery of claim 1 , wherein the secondary battery further comprises a cap plate on the case and wherein the connector is located adjacent a bottom of the case substantially opposite to the cap plate.

11. The secondary battery of claim 1 , wherein the pressurization holder comprises a generally elastic and flexible material.

12. The secondary battery of claim 1 , wherein one of the exterior-facing surface and the interior facing surface is substantially smooth.

13. The secondary battery of claim 1 , wherein the buffer recess generally corresponds to a center of the electrode assembly.

14. The secondary battery of claim 1 , wherein the buffer recess extends to an edge of one of the side walls.

Assignees

• Byun Sang-Won
• Samsung Sdi Co Ltd
• Bosch Gmbh Robert

Inventors

• Byun Sang-Won

Classifications

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H01M50/103 Primary

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

• H01M10/0413

  Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes · CPC title

• H01M50/147

  Lids or covers · CPC title

• H01M10/0468

  Compression means for stacks of electrodes and separators · CPC title