Porous membrane having single layer structure, battery separator

Details Porous membrane having single layer structure, battery separator Porous membrane having single layer structure, battery separator

1992-12-17

1995-09-26

Dees, Jose G.

Chemistry: electrical current producing apparatus, product, and

With control means responsive to battery condition sensing...

Temperature control

429142, 429145, 429249, 429254, H01M 216

Patent

active

054533333

ABSTRACT:
A porous membrane of a single layer structure formed from a first polymer having a melting point of at least 130.degree. C. and a second polymer having a melting point of up to 120.degree. C., wherein the walls of the pores of the membrane have an amount of second polymer insufficient to block the permeability of the pores under normal operating temperature conditions yet sufficient to do so when the membrane reaches a temperature equal to or greater than the second polymer's melting point.

REFERENCES:
patent: 4075400 (1978-02-01), Fritts
patent: 4217404 (1980-08-01), Verzwyvelt
patent: 4650730 (1987-05-01), Lundquist et al.
patent: 4741979 (1988-05-01), Faust et al.
patent: 4812375 (1989-03-01), Foster
patent: 4973532 (1990-11-01), Taskier

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