Title:
BUTTON-TYPE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/063797
Kind Code:
A1
Abstract:
The present invention relates to a button-type secondary battery wherein, when an electrode assembly is mounted in a lower can having an upper wall portion upwardly formed along the circumference of a flat lower surface and an electrolyte is injected, an upper can having a lower wall portion downwardly formed along the circumference of a flat upper surface is press-fitted and thereby coupled to the lower can so that the upper wall portion is positioned inside the lower wall portion. The button-type secondary battery is characterized by comprising: the electrode assembly, which is manufactured by winding a negative electrode, a separator, and a positive electrode, and has a negative electrode tab extending downward and a positive electrode tab extending upward; a gasket disposed between the upper and lower cans to provide electrical insulation; a top insulator that is electrically insulating and disposed so as to cover the upper surface of the electrode assembly, and that expands in volume by absorbing the electrolyte; and a bottom insulator that is electrically insulating and disposed so as to cover the lower surface of the electrode assembly, and that expands in volume by absorbing the electrolyte, wherein the surface of at least one of the top insulator or the bottom insulator is coated with a protective layer that prevents heat shrinkage.
Inventors:
JUNG YEONG HUN (KR)
TAE YOUNG JI (KR)
SUNG JOO HWAN (KR)
CHO MIN SU (KR)
PARK GEUN YOUNG (KR)
KIM MIN GYU (KR)
KIM MIN SEON (KR)
CHAE SANG HAK (KR)
JU MIN YOUNG (KR)
TAE YOUNG JI (KR)
SUNG JOO HWAN (KR)
CHO MIN SU (KR)
PARK GEUN YOUNG (KR)
KIM MIN GYU (KR)
KIM MIN SEON (KR)
CHAE SANG HAK (KR)
JU MIN YOUNG (KR)
Application Number:
PCT/KR2022/015657
Publication Date:
April 20, 2023
Filing Date:
October 14, 2022
Export Citation:
Assignee:
LG ENERGY SOLUTION LTD (KR)
International Classes:
H01M50/593; H01M10/04; H01M50/586
Foreign References:
| KR20200020619A | 2020-02-26 | |||
| KR20110057987A | 2011-06-01 | |||
| CN112599902A | 2021-04-02 | |||
| JP2019016594A | 2019-01-31 | |||
| KR20200142451A | 2020-12-22 |
Attorney, Agent or Firm:
BAE, KIM & LEE IP (KR)
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