Trilayer battery separator

Details Trilayer battery separator Trilayer battery separator

H - Electricity

01

M

H01M 2/14 (2006.01) B29C 55/06 (2006.01) B32B 27/20 (2006.01) H01M 2/16 (2006.01) H01M 6/50 (2006.01)

Patent

CA 2266152

A trilayer shutdown battery separator is provided having two strength layers sandwiching a shutdown layer that is made by a particle stretch method. The preferred method of making such a trilayer separator comprises: making microporous strength layers; forming a microporous shutdown layer by a particle stretch method; and bonding two microporous strength layers and one microporous shutdown layer into the trilayer battery separator wherein the first and third layers are strength layers, and the second membrane is a microporous shutdown layer made by a particle stretch method.

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