SEPARATOR WOUND-ROUND BODY FOR SECONDARY BATTERY

Title:

SEPARATOR WOUND-ROUND BODY FOR SECONDARY BATTERY

Document Type and Number:

Japanese Patent JP2023112590

Kind Code:

A

Abstract:

To provide a resin sheet used for transporting a separator, and a wound-round body or a lamination body of the separator and the resin sheet, capable of suppressing or preventing a blocking over a long time in a storage and transportation, maintaining a quality at a slit, and having a secondary battery characteristic.SOLUTION: The present invention provides a separator for a secondary battery device and a wound-round body to which a resin sheet is wound. The separator for the secondary battery device, includes: a polyolefin porous base material; and a thermoplastic polymer layer containing a thermoplastic polymer in at least one part of at least one surface of the polyolefin porous base material. A MD tensile elastic modulus of the resin sheet is 1000 kgf/cm2 or more and 15000 kgf/cm2 or less, and a ratio of the MD tensile elastic modulus of the separator for the secondary battery device against the MD tensile elastic modulus of the resin sheet is 0.35 or more and 10.0 or less.SELECTED DRAWING: None

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Inventors:

OKADA MASAAKI
MIYAZAWA HIROSHI

Application Number:

JP2022014483A

Publication Date:

August 14, 2023

Filing Date:

February 01, 2022

Export Citation:

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Assignee:

ASAHI KASEI CORP

International Classes:

H01M50/449; H01M50/403; H01M50/417; H01M50/42; H01M50/494

Attorney, Agent or Firm:

Atsushi Aoki
Shinji Mihashi
Kazuhiro Nakamura
Miyako Saito
Shunsuke Sanma

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