Title:
SEPARATOR AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2007/135952
Kind Code:
A1
Abstract:
A separator whose dynamic hardness (DH) at reaching of press member load to 12
kgf/cm2 is 1000 or above is used in a nonaqueous electrolyte secondary
battery. This separator has at least one porous layer (X) containing a polyolefin
and at least one porous layer (Y) containing a heat resistant resin. The void
ratio of the porous layer (X) is in the range of 35 to 65%. In the pore diameter distribution
of the porous layer (X) as measured by a mercury porosimeter, pores of 0.02 to 0.2
μm diameter occupy 40 vol.% or more of the whole pore volume. The heat resistant
resin exhibits a thermal deformation temperature of 160°C or higher.
Inventors:
KASAMATSU SHINJI
OKAMURA KAZUHIRO
OKAMURA KAZUHIRO
Application Number:
PCT/JP2007/060144
Publication Date:
November 29, 2007
Filing Date:
May 17, 2007
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
KASAMATSU SHINJI
OKAMURA KAZUHIRO
KASAMATSU SHINJI
OKAMURA KAZUHIRO
International Classes:
H01M4/38; H01M4/48; H01M4/485; H01M4/50; H01M4/505; H01M4/52; H01M4/525; H01M10/05; H01M10/052; H01M10/36; H01M50/414; H01M50/449; H01M50/489; H01M50/491
Foreign References:
| JP2001200081A | 2001-07-24 | |||
| JP2004323820A | 2004-11-18 | |||
| JP2005343936A | 2005-12-15 | |||
| JPH06208849A | 1994-07-26 | |||
| JPH10294100A | 1998-11-04 | |||
| JP2002246070A | 2002-08-30 |
Attorney, Agent or Firm:
ISHII, Kazuo et al. (3-6 Kitahama 2-chome,Chuo-ku, Osaka-shi, Osaka 41, JP)
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