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Patent Searching and Data


Title:
SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2021/020151
Kind Code:
A1
Abstract:
A secondary battery is provided which comprises a wound electrode body (100) obtained by winding a positive electrode (1) and a negative electrode (2) with a separator (3) interposed therebetween. In this secondary battery, the positive electrode and negative electrode each includes an electrode current collector (11, 21) and an electrode material layer (12, 22) disposed on the electrode current collector so as to form an electrode current collector exposed part (11E, 21E) where a part of said electrode current collector is exposed; in cross-sectional view of the wound electrode body, the negative electrode current collector exposed part (21E) includes a first negative electrode current collector exposed part (21A) which is opposite of the positive electrode material layer (12) of the nearest positive electrode on both sides in the wound electrode body thickness direction. An insulation member (5) is provided on the first negative electrode current collector exposed part to cover this, and the insulation member has a greater elongation at break than the negative electrode current collector (21).

Inventors:
TAKAHASHI HIDETOSHI (JP)
Application Number:
PCT/JP2020/027716
Publication Date:
February 04, 2021
Filing Date:
July 16, 2020
Export Citation:
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Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01M10/04; H01M10/0587
Foreign References:
JP2006310222A2006-11-09
JP2010055790A2010-03-11
JP2018206514A2018-12-27
JP2003104431A2003-04-09
JP2002042881A2002-02-08
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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