Title:
SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2020/111591
Kind Code:
A1
Abstract:
The present invention relates to a secondary battery capable of improving a venting pressure distribution. In addition, the present invention relates to a secondary battery comprising: an electrode assembly; a can member for accommodating the electrode assembly therein; and a top cap assembly for covering the opening of the can member, wherein the top cap assembly comprises a top cap positioned on a top part and a safety vent part positioned below the top cap, and the safety vent part comprises a breaking part which breaks when the internal pressure in the can member increases above a predetermined level; a breaking notch part for forming a boundary of the breaking part; and a bending notch part formed at a position spaced apart from the breaking notch part toward the center of the breaking part, on the bottom surface of the breaking part facing the inside of the can member, and the bending notch part is bent when the internal pressure in the can member increases.
Inventors:
MIN GEON WOO (KR)
LEE JE JUN (KR)
JUNG SANG SUK (KR)
LEE JE JUN (KR)
JUNG SANG SUK (KR)
Application Number:
PCT/KR2019/015396
Publication Date:
June 04, 2020
Filing Date:
November 13, 2019
Export Citation:
Assignee:
LG CHEMICAL LTD (KR)
International Classes:
H01M50/107; H01M50/574
Foreign References:
| JPH06215746A | 1994-08-05 | |||
| JPH08339793A | 1996-12-24 | |||
| JP2001102038A | 2001-04-13 | |||
| KR20150035267A | 2015-04-06 | |||
| US10090497B2 | 2018-10-02 | |||
| KR20110095118A | 2011-08-24 |
Attorney, Agent or Firm:
BAE, KIM & LEE IP GROUP (KR)
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