Battery separator and method of making same

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United States of America Patent

PATENT NO 9112214
APP PUB NO 20070148538A1
SERIAL NO

11683022

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Abstract

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A battery separator comprises a multi-layered film, individual layers of film having been bonded together by heat and pressure, having a peel strength of greater than or equal to 40 grams per inch (1.6 g/mm) and a thickness of ≦25 microns. A method for making a battery separator comprises the steps of: extruding and winding up a first precursor film, extruding and winding up a second precursor film, unwinding the first and second precursor films, stacking up the first and second precursor films to form a single stacked precursor, laminating the single stacked precursor film, winding up the laminated single stacked precursor film, stacking up a plurality of laminated single stacked precursor films, and making microporous the stacked plurality of laminated single stacked precursor films.

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Patent Owner(s)

Patent OwnerAddress
CELGARD INCNORTH CAROLINA NORTH CAROLINA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Call, Ronald W Rock Hill, US 20 190

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