Title:
SEPARATOR FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP2018147688
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a separator for a nonaqueous electrolyte secondary battery having a small air permeability difference before and after pressurization.SOLUTION: The separator for a nonaqueous electrolyte secondary battery is so configured that an average of the wrinkle prevention ratio per unit area of TD and the wrinkle prevention ratio per unit area of MD of a polyolefin porous film is 5.0% or more, and a difference between the wrinkle prevention ratio per unit area of TD and the wrinkle prevention ratio per unit area of MD is 3.5% or less.SELECTED DRAWING: Figure 1
Inventors:
AZUMA YUICHIRO
Application Number:
JP2017041092A
Publication Date:
September 20, 2018
Filing Date:
March 03, 2017
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO
International Classes:
B32B5/32; B32B27/32; H01M10/052; H01M10/0566; H01M50/406; H01M50/414; H01M50/417; H01M50/489; H01M50/443
Domestic Patent References:
| JP2017103041A | 2017-06-08 | |||
| JP2017103045A | 2017-06-08 |
Foreign References:
| WO2015194504A1 | 2015-12-23 | |||
| WO2010073707A1 | 2010-07-01 | |||
| WO2016204274A1 | 2016-12-22 |
Attorney, Agent or Firm:
Kazuya Hasegawa
Kentaro Tsuruta
Kentaro Tsuruta