发明公开
- 专利标题: SECONDARY BATTERY
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申请号: EP22788506.8申请日: 2022-04-15
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公开(公告)号: EP4203164A1公开(公告)日: 2023-06-28
- 发明人: HWANG, Soo-Ji , KIM, Sang-Hun , KANG, Min-Hyeong , SONG, Dae-Woong , YU, Hyung-Kyun , LIM, Hun-Hee
- 申请人: LG Energy Solution, Ltd.
- 申请人地址: KR Seoul 07335 Tower 1, 108, Yeoui-daero Yeongdeungpo-gu
- 代理机构: Plasseraud IP
- 优先权: KR20210049379 20210415
- 国际公布: WO2022220651 20221020
- 主分类号: H01M50/375
- IPC分类号: H01M50/375 ; H01M50/342 ; H01M50/197 ; H01M50/193 ; H01M50/178 ; H01M50/129
摘要:
Disclosed herein is a secondary battery, which includes an electrode assembly; an electrode lead attached to the electrode assembly; a case configured to accommodate the electrode assembly therein; a lead film formed to surround a part of an outer surface of the electrode lead and interposed between the electrode lead and the case; a vent region formed in at least a part of the case; and a vent member inserted into the vent region and having a structure of three or more layers, wherein the vent member contains a linear low-density polyethylene having a comonomer with a carbon number of 6 or more in outermost layers and contains a resin having a higher melting point than the linear low-density polyethylene having a comonomer with a carbon number of 6 or more in a middle layer.
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