Title:
NEGATIVE ELECTRODE PLATE, PREPARATION METHOD THEREFOR, SECONDARY BATTERY CONTAINING SAME, BATTERY MODULE, BATTERY PACK, AND ELECTRICAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/066004
Kind Code:
A1
Abstract:
The present application provides a negative electrode plate, which comprises a current collector and a negative electrode film layer that is located on at least one surface of the current collector, and the negative electrode film layer comprises a negative electrode active material and an emulsion type binder. On the surface of the negative electrode active material, at least part of the emulsion type binder is distributed in an irregular film shape. The negative electrode plate has significantly improved cohesion and bonding forces. The problems that the pass rate of electrode plates is decreasing due to active material powder falling, negative electrode film layer cracking, and negative electrode film layer falling off and the like are significantly improved, and the cyclic performance of the secondary battery comprising the negative electrode electrode plate of the present invention is significantly improved. The present application also provides a preparation method for a negative electrode plate, a secondary battery containing the negative electrode plate, a battery module, a battery pack and an electrical device.
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Inventors:
ZHANG TONGXIAN (CN)
ZHANG MING (CN)
ZHANG MING (CN)
Application Number:
PCT/CN2022/122555
Publication Date:
April 27, 2023
Filing Date:
September 29, 2022
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M4/133; H01M4/134; H01M4/62; H01M10/0525
Domestic Patent References:
| WO2019082587A1 | 2019-05-02 |
Foreign References:
| CN109786855A | 2019-05-21 | |||
| CN109935843A | 2019-06-25 | |||
| GB1346890A | 1974-02-13 | |||
| US0552709A | 1896-01-07 |
Attorney, Agent or Firm:
PEKSUNG INTELLECTUAL PROPERTY LTD. (CN)
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