BATTERY SEPARATOR
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United States of America Patent
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Issued Date -
Oct 23, 2014
app pub date -
Jun 24, 2013
filing date -
Nov 16, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A battery separator includes a microporous polyolefin membrane and a modifying porous layer laminated on at least one surface of the microporous polyolefin membrane, wherein the microporous polyolefin membrane comprises a polyethylene resin, and the modifying porous layer is laminated on at least one surface of the microporous polyolefin membrane having (a) a shutdown temperature of 135° C. or lower, (b) a rate of air resistance change of 1×104 sec/100 cc/° C. or more, and (c) a transverse shrinkage rate at 130° C. of 20% or less.
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