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Patent Searching and Data


Title:
VENTING DEVICE AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2019/216520
Kind Code:
A1
Abstract:
A venting device according to an embodiment of the present invention for solving the problems, which is inserted in a sealing portion of a pouch of a secondary battery, comprises: a housing which is inserted between both sides of the sealing portion and is sealed along with the sealing portion; a sheet formed of metal in the housing and having a passage therethrough for communication between the inside and the outside of the pouch; and a ball which, at an outlet side of the passage, opens or closes the passage when in contact with or spaced apart from the sheet, wherein the sheet has, on an edge at the outlet of the passage, inner corners which are chamfered or filleted so as to face the ball, and the sheet comprises a surface treatment layer on the chamfered or filleted edge, and a polymer layer formed of a polymer and fused on the surface treatment layer.

Inventors:
KIM, Na Yoon (LG Chem Research Park, 188 Munji-ro,,Yuseong-gu, Daejeon, 34122, KR)
CHOI, Yong Su (LG Chem Research Park, 188 Munji-ro,,Yuseong-gu, Daejeon, 34122, KR)
KIM, Sang Hun (LG Chem Research Park, 188 Munji-ro,,Yuseong-gu, Daejeon, 34122, KR)
YU, Hyung Kyun (LG Chem Research Park, 188 Munji-ro,,Yuseong-gu, Daejeon, 34122, KR)
HWANG, Soo Ji (LG Chem Research Park, 188 Munji-ro,,Yuseong-gu, Daejeon, 34122, KR)
Application Number:
KR2019/000972
Publication Date:
November 14, 2019
Filing Date:
January 23, 2019
Export Citation:
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Assignee:
LG CHEM, LTD. (128 Yeoui-daero, Yeongdeungpo-gu, Seoul, 07336, KR)
International Classes:
H01M2/12; F16K17/04; H01M2/02
Attorney, Agent or Firm:
BAE, KIM & LEE IP GROUP (11th Floor, 343 Gangnam-daero,,Seocho-gu, Seoul, 06626, KR)
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