Title:
SECONDARY CELL
Document Type and Number:
WIPO Patent Application WO/2017/038327
Kind Code:
A1
Abstract:
Provided is a secondary cell in which a protective layer is interposed between a positive electrode and a negative electrode such that secondary shorts between the positive electrode and the negative electrode can be avoided even when the secondary cell is in a high temperature state, thereby improving safety. This secondary cell 100 has a negative electrode protective layer 32c provided on a surface of a negative electrode mixture layer 32a of a negative electrode 32, wherein the negative electrode protective layer 32c includes an inorganic filler 32c1, a resin filler 32c2, and a binding material 32c3. A resin having a higher melting point than separators 33, 35 and the binding material 32c3 is used as the resin filler 32c2. As a result, at times of abnormal heat generation, this resin filler 32c2 functions as a second binding material, thereby inhibiting movement of the inorganic filler 32c1. Consequently, even if the separators 33, 35 shrink, secondary shorts between a positive electrode 34 and the negative electrode 32 can be avoided, thereby improving safety.
Inventors:
ARIGA TOSHIYUKI (JP)
TSUNAKI TAKURO (JP)
MIKI TAKESHI (JP)
SASAKI HIRONORI (JP)
TSUNAKI TAKURO (JP)
MIKI TAKESHI (JP)
SASAKI HIRONORI (JP)
Application Number:
PCT/JP2016/072099
Publication Date:
March 09, 2017
Filing Date:
July 28, 2016
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
H01M10/058; H01M4/02; H01M4/13; H01M10/04; H01M10/052; H01M50/409
Domestic Patent References:
| WO1997001870A1 | 1997-01-16 | |||
| WO2008114727A1 | 2008-09-25 | |||
| WO2006064775A1 | 2006-06-22 |
Foreign References:
| JP2005327680A | 2005-11-24 | |||
| JP2010225545A | 2010-10-07 | |||
| JP2010225539A | 2010-10-07 |
Attorney, Agent or Firm:
INOUE Manabu et al. (JP)
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