Title:
ELECTRODE SHEET, ELECTRODE ASSEMBLY, BATTERY CELL, BATTERY, AND ELECTRICAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/077628
Kind Code:
A1
Abstract:
Disclosed in the present application are an electrode sheet, an electrode assembly, a battery cell, a battery, and an electrical device. The electrode sheet comprises a current collector and an active substance layer which are distributed in the thickness direction of the electrode sheet, the active substance layer comprising a first active substance layer and a second active substance layer which is located on the side of the first active substance layer away from the current collector, and the resistance of the second active substance layer being smaller than that of the first active substance layer. The electrode sheet is a negative electrode sheet, and the resistance of the second active material layer is 20 mohm-300 mohm; or the electrode sheet is a positive electrode sheet, and the resistance of the second active substance layer is 100 mohm-600 mohm. In the electrode sheet, the second active substance layer having relatively small resistance is arranged on the surface of the first active substance layer, thus making the surface impedance of the electrode sheet small. The negative electrode sheet can effectively ameliorate the metal precipitation phenomenon on the electrode sheet surface during a rapid-heating charging process, while the positive electrode sheet can ameliorate the phenomenon of early charging cut-off before full charging due to an excessively high charging voltage.
Inventors:
OUYANG SHAOCONG (CN)
FU CHENGHUA (CN)
XU BAOYUN (CN)
MA WENJIAN (CN)
YE YONGHUANG (CN)
FU CHENGHUA (CN)
XU BAOYUN (CN)
MA WENJIAN (CN)
YE YONGHUANG (CN)
Application Number:
PCT/CN2022/125513
Publication Date:
April 18, 2024
Filing Date:
October 14, 2022
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M4/04; H01M4/13
Foreign References:
| CN107004827A | 2017-08-01 | |||
| CN101159324A | 2008-04-09 | |||
| CN101809790A | 2010-08-18 | |||
| CN1725548A | 2006-01-25 | |||
| JP2006286427A | 2006-10-19 |
Attorney, Agent or Firm:
BEIJING WEIFEI LIANCHUANG INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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