Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Ken Shimizu0
Naoki Mizuno0
Michihiko Irie0
Masanori Nakamura0
Date of Patent
May 5, 2015
0Patent Application Number
142379410
Date Filed
February 8, 2013
0Patent Primary Examiner
Patent abstract
A battery separator includes a porous membrane A with a thickness of less than 10 μm including a polypropylene resin, and a porous membrane B laminated thereon including a heat resistant resin and inorganic particles or cross-linked polymer particles, wherein the porous membrane A satisfies a specific range of thickness, average pore size, and porosity, and the entire battery separator satisfies a specific range of thickness, peeling strength at the interface between the porous membrane A and the porous membrane B, and difference in air resistance between the entire battery separator and the porous membrane A.
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