Title:
SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2019/112160
Kind Code:
A1
Abstract:
The present invention relates to a secondary battery capable of improving the coupling force between a safety vent and a cap-up. For example, disclosed is a secondary battery comprising: an electrode assembly; a case for accommodating the electrode assembly; a cap assembly coupled to the upper part of the case; and a gasket interposed between the cap assembly and the case, wherein the cap assembly includes a cap-up and a safety vent, which is provided at the lower part of the cap-up and has a vent extension part extending to the upper part of the cap-up so as to encompass the edge of the cap-up, a welding region, in which the safety vent and the cap-up are welded and coupled by laser welding, is formed in the vent extension part, and the welding region is formed in a line shape.
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Inventors:
KO SUNG GWI (KR)
KIM DAE KYU (KR)
MOON JIN YOUNG (KR)
KIM DAE KYU (KR)
MOON JIN YOUNG (KR)
Application Number:
PCT/KR2018/011760
Publication Date:
June 13, 2019
Filing Date:
October 05, 2018
Export Citation:
Assignee:
SAMSUNG SDI CO LTD (KR)
International Classes:
B23K26/21; H01M50/167; H01M50/574; H01M50/593
Foreign References:
| KR100878701B1 | 2009-01-14 | |||
| KR20070077436A | 2007-07-26 | |||
| KR101520064B1 | 2015-05-14 | |||
| JP2009266782A | 2009-11-12 | |||
| JP2003187773A | 2003-07-04 |
Other References:
See also references of EP 3723164A4
Attorney, Agent or Firm:
SUNGAM SUH INTERNATIONAL PATENT & LAW FIRM (KR)
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