Title:
SECONDARY BATTERY AND MANUFACTURING METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/230250
Kind Code:
A1
Abstract:
Provided is a secondary battery comprising an electrode assembly and an exterior body that accommodates the electrode assembly. In such a secondary battery, the exterior body includes a cup-shaped exterior member and a lid-shaped exterior member connected to each other by a welded portion, an end portion of at least one of the cup-shaped exterior member and the lid-shaped exterior member has a stepped portion on the inner side surface, the stepped portion includes a first extending surface and a second extending surface extending in substantially the same direction and having different heights from each other and a stepped surface that connects the two extending surfaces, the welded portion is provided so as to include a part of the stepped portion provided at the end portion of the at least one exterior member and the end portion of the other exterior member, and the stepped surface of the stepped portion and the other exterior member are separated from each other.
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Inventors:
KITAMURA TOYOFUMI (JP)
Application Number:
PCT/JP2021/017937
Publication Date:
November 18, 2021
Filing Date:
May 11, 2021
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01M10/052; H01M10/058; H01M50/109; H01M50/153
Domestic Patent References:
| WO2017082317A1 | 2017-05-18 |
Foreign References:
| JP2019160743A | 2019-09-19 | |||
| JP2014035871A | 2014-02-24 | |||
| JP2012200768A | 2012-10-22 | |||
| JP2009266695A | 2009-11-12 | |||
| JP2012104414A | 2012-05-31 | |||
| JPH0982361A | 1997-03-28 | |||
| JPH08315790A | 1996-11-29 | |||
| JPH10156564A | 1998-06-16 | |||
| JP2013237102A | 2013-11-28 | |||
| JP2015163412A | 2015-09-10 | |||
| JP2015176784A | 2015-10-05 | |||
| JP2019123008A | 2019-07-25 |
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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