NONAQUEOUS ELECTROLYTE SECONDARY BATTERY SEPARATOR
The object of the invention is to provide a nonaqueous electrolyte secondary battery separator that realizes a reduced increase in the battery resistance after a charge and discharge cycle. The nonaqueous electrolyte secondary battery separator is arranged such that the number of bends is not less t...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The object of the invention is to provide a nonaqueous electrolyte secondary battery separator that realizes a reduced increase in the battery resistance after a charge and discharge cycle. The nonaqueous electrolyte secondary battery separator is arranged such that the number of bends is not less than 1600, the number having been measured with use of a test piece of a polyolefin porous film witha longitudinal direction in a transverse direction (TD) of the polyolefin porous film and by an MIT tester method, and the bends having been carried out until a longitudinal dimension of the test piece changes by 2.4 cm.
本发明的课题是实现可抑制充放电循环后的电池电阻增加的非水电解液二次电池用间隔件。本发明的非水电解液二次电池用间隔件的使用以聚烯烃多孔膜的TD为长度方向的试验片通过MIT试验机法测定的上述试验片的长度方向的长度发生2.4cm变化为止的弯折次数为1600次以上。 |
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