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Title:
SECONDARY BATTERY AND PREPARATION METHOD THEREFOR, AND DEVICE CONTAINING SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2021/232288
Kind Code:
A1
Abstract:
The present application relates to a secondary battery, comprising an electrode plate and a tab, wherein the electrode plate comprises a current collector and a plate film layer disposed on the current collector; the plate film layer is provided with a first region and a second region in the extension direction of the tab; the second region is closer to the tab side than the first region; the thickness of the first region is denoted by H1, the thickness of the second region is denoted by H2, and the plate film layer satisfies: 0.6 ≤ H2/H1 < 1. The present application further relates to a preparation method for the secondary battery, and a device containing the secondary battery.

Inventors:
WANG, Bangrun (Zhangwan Town Jiaocheng Distric, Ningde City Fujian 0, CN)
SUN, Xin (Zhangwan Town Jiaocheng Distric, Ningde City Fujian 0, CN)
Application Number:
PCT/CN2020/091311
Publication Date:
November 25, 2021
Filing Date:
May 20, 2020
Export Citation:
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Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED (Zhangwan Town Jiaocheng Distric, Ningde City Fujian 0, CN)
International Classes:
H01M10/058; H01M10/04; H01M4/13
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