NONAQUEOUS ELECTROLYTE SECONDARY BATTERY SEPARATOR

To provide a nonaqueous electrolyte secondary battery separator that allows a nonaqueous electrolyte secondary battery including the nonaqueous electrolyte secondary battery separator to have a reduced increase in the battery resistance after a charge and discharge cycle, a nonaqueous electrolyte se...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	YOSHIMARU, Chikae
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	To provide a nonaqueous electrolyte secondary battery separator that allows a nonaqueous electrolyte secondary battery including the nonaqueous electrolyte secondary battery separator to have a reduced increase in the battery resistance after a charge and discharge cycle, a nonaqueous electrolyte secondary battery separator is arranged such that the number of bends is not less than 1600, the number having been measured (i) with use of a test piece of a polyolefin porous film which test piece has a longitudinal direction in a transverse direction (TD) of the polyolefin porous film and (ii) by an MIT tester method, the bends having been carried out until a longitudinal dimension of the test piece changes by 2.4 cm.