Title:
SECONDARY BATTERY AND PREPARATION METHOD THEREFOR, BATTERY MODULE, BATTERY PACK, AND ELECTRIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/230859
Kind Code:
A1
Abstract:
The present application provides a secondary battery and a preparation method therefor. The secondary battery comprises a positive electrode plate and an electrolyte; the positive electrode plate comprises a positive electrode current collector and a positive electrode film layer provided on at least one surface of the positive electrode current collector; the porosity of the positive electrode film layer is P; the electrolyte comprises a water-removing additive, and on the basis of the total mass of the electrolyte, the mass percent of the water-removing additive in the electrolyte is a; moreover, the secondary battery satisfies: 0.2≤(a*100)/P≤3.5. The secondary battery of the present application has improved initial direct-current resistance (DCR) and high-temperature cycle performance while increasing the porosity to achieve both high energy density and good dynamics. The present application also provides a battery module, battery pack and electric device comprising the secondary battery of the present application.
More Like This:
Inventors:
HUANG LEI (CN)
HAN CHANGLONG (CN)
WU ZELI (CN)
ZHANG CUIPING (CN)
WANG FULIN (CN)
HAN CHANGLONG (CN)
WU ZELI (CN)
ZHANG CUIPING (CN)
WANG FULIN (CN)
Application Number:
PCT/CN2022/096293
Publication Date:
December 07, 2023
Filing Date:
May 31, 2022
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M4/13; H01M10/0567
Foreign References:
| CN114665065A | 2022-06-24 | |||
| CN111540945A | 2020-08-14 | |||
| JP2013030284A | 2013-02-07 | |||
| CN101103070A | 2008-01-09 | |||
| CN109671950A | 2019-04-23 | |||
| CN114106047A | 2022-03-01 |
Attorney, Agent or Firm:
PEKSUNG INTELLECTUAL PROPERTY LTD. (CN)
Download PDF: