Battery separator

Chemistry: electrical current producing apparatus – product – and – With control means responsive to battery condition sensing... – Temperature control

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Details

429145, H01M 218, H01M 1050

Patent

active

047313048

ABSTRACT:
A multiply sheet product useful as a battery separator having at least two plies each in the form of a microporous sheet of predetermined length and breadth and a thickness of less than 10 mils wherein (a) at least one of said ply being a sheet capable of transforming to a substantially non-porous membrane at a temperature between about 80.degree. C. and 150.degree. C. while essentially maintaining its length and breadth dimensions and (b) at least one ply being a sheet capable of maintaining its dimensions and porosity at temperatures from ambient to at least about 10.degree. C. greater than the transformation temperature of sheet (a).

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