Title:
NONAQUEOUS ELECTROLYTE SECONDARY CELL
Document Type and Number:
WIPO Patent Application WO/2012/147783
Kind Code:
A1
Abstract:
The present invention provides a nonaqueous electrolyte secondary cell having satisfactory overcharge characteristics and charge-discharge cycle characteristics, wherein thermal runaway in the battery caused by external impact can be suppressed even from a fully charged state through to an overcharged state. The present invention is a nonaqueous electrolyte secondary cell (1) comprising a wound electrode assembly (14) on which a positive electrode plate (11) and a negative electrode plate (12) are wound via a first separator (13a) and a second separator (13b), and a nonaqueous electrolyte having an electrolyte salt in a nonaqueous solvent; wherein the positive electrode plate (11) has an inorganic particle layer formed on the surface of a positive electrode active material layer, the first separator (13a) is positioned on a side in contact with the outer peripheral surface of the negative electrode plate (12), the second separator (13b) is positioned on a side in contact with the inner peripheral surface of the negative electrode plate (12), the tension rupture strength of the first separator (13a) in a direction perpendicular to the winding direction of the wound electrode assembly (14) is 7.8 to 11.8 N, and the tension rupture strength of the second separator (13b) in a direction perpendicular to the winding direction of the wound electrode assembly (14) is 2.9 to 5.9 N.
Inventors:
IKEDA YOSHIHIKO (JP)
MORIMOTO TAKUYA (JP)
INOMATA HIDEYUKI (JP)
MORIMOTO TAKUYA (JP)
INOMATA HIDEYUKI (JP)
Application Number:
PCT/JP2012/061074
Publication Date:
November 01, 2012
Filing Date:
April 25, 2012
Export Citation:
Assignee:
SANYO ELECTRIC CO (JP)
IKEDA YOSHIHIKO (JP)
MORIMOTO TAKUYA (JP)
INOMATA HIDEYUKI (JP)
IKEDA YOSHIHIKO (JP)
MORIMOTO TAKUYA (JP)
INOMATA HIDEYUKI (JP)
International Classes:
H01M10/0587; H01M4/13; H01M10/0566; H01M50/409; H01M50/443; H01M50/489; H01M50/494
Domestic Patent References:
| WO2006061940A1 | 2006-06-15 |
Foreign References:
| JP2008210573A | 2008-09-11 | |||
| JP2005285681A | 2005-10-13 | |||
| JP2004193116A | 2004-07-08 | |||
| JPH10302748A | 1998-11-13 | |||
| JPH09266010A | 1997-10-07 |
Attorney, Agent or Firm:
OHASHI MASAAKI (JP)
Masaaki Ohashi (JP)
Masaaki Ohashi (JP)
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Claims: