GAS-PERMEABLE FILM, POUCH EXTERIOR MATERIAL CONTAINING SAME, AND SECONDARY BATTERY

Title:

GAS-PERMEABLE FILM, POUCH EXTERIOR MATERIAL CONTAINING SAME, AND SECONDARY BATTERY

Document Type and Number:

WIPO Patent Application WO/2024/106944

Kind Code:

A1

Abstract:

The gas-permeable film of the present invention comprises a first polymer layer, a second polymer layer, and a third polymer layer disposed between the first polymer layer and the second polymer layer, wherein the third polymer layer contains polypropylene and polytetrafluoroethylene at a weight ratio of 9:1 to 1:9. The gas-permeable film exhibits excellent gas permeability and, when applied to secondary batteries, can effectively vent gases generated inside the secondary batteries.

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Inventors:

KIM SANG HUN (KR)
LIM HUN HEE (KR)
YU HYUNG KYUN (KR)
HWANG SOO JI (KR)
KANG MIN HYEONG (KR)
SONG DAE WOONG (KR)

Application Number:

PCT/KR2023/018368

Publication Date:

May 23, 2024

Filing Date:

November 15, 2023

Export Citation:

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Assignee:

LG ENERGY SOLUTION LTD (KR)

International Classes:

B32B27/08; B32B7/022; B32B7/12; B32B15/085; B32B27/32; H01M10/0587; H01M50/179; H01M50/186; H01M50/534

Foreign References:

KR20220081313A	2022-06-15
JPH10512620A	1998-12-02
KR20210025405A	2021-03-09
KR20160077968A	2016-07-04
JP2007214451A	2007-08-23

Attorney, Agent or Firm:

BAE, KIM & LEE IP (KR)

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