CYLINDRICAL RECHARGEABLE BATTERY WITH IMPROVED STABILITY

WIPO Patent Application WO/2011/019237

A2

Provided is a cylindrical rechargeable battery in which an electrode assembly produced by the winding of an anode/separating film/cathode and an electrolytic solution are housed inside a cylindrical can, wherein a cap assembly mounted on the open upper part of the cylindrical can comprises: a safety vent formed with a predetermined notch so as to be ruptured by high-pressure gas in the battery; a current-blocking member which is coupled by welding to the lower edge of the safety vent and blocks current when the internal pressure of the battery rises; and a gasket for the current-blocking member surrounding the outer circumferential surface of the current-blocking member, and wherein the current-blocking member comprises two or more through holes for discharging gas, and the through holes are formed with a size such that their overall surface area is from 20 to 50% of the overall surface area of the current-blocking member.

KIM JI YOUNG (KR)
KIM JUNGJIN (KR)
LEE KWAN SOO (KR)
KIM SUNGJONG (KR)
KIM SOORYOUNG (KR)
KU CHAHUN (KR)
RYU DUKHYUN (KR)
JUNG BYUNG KYU (KR)

PCT/KR2010/005338

February 17, 2011

August 13, 2010

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LG CHEMICAL LTD (KR)
KIM JI YOUNG (KR)
KIM JUNGJIN (KR)
LEE KWAN SOO (KR)
KIM SUNGJONG (KR)
KIM SOORYOUNG (KR)
KU CHAHUN (KR)
RYU DUKHYUN (KR)
JUNG BYUNG KYU (KR)

H01M2/12; H01M2/08; H01M2/34

KR100855181B1	2008-08-29
KR100619631B1	2006-09-12
KR20040037579A	2004-05-07
JP2008262832A	2008-10-30

See references of EP 2466668A4

SOHN, CHANG KYU (KR)
손창규 (KR)

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