Title:
ELECTRODE ASSEMBLY, SECONDARY BATTERY, BATTERY MODULE, BATTERY PACK, AND ELECTRIC APPARATUS
Document Type and Number:
WIPO Patent Application WO/2023/060494
Kind Code:
A1
Abstract:
Provided in the present application are an electrode assembly, a secondary battery, a battery module, a battery pack, and an electric apparatus. The electrode assembly comprises a positive electrode plate, a negative electrode plate, and an isolation film, which is located between the positive electrode plate and the negative electrode plate, wherein the positive electrode plate satisfies 0 < CAP1/CAP2 < 1, CAP1 representing the capacity of a first positive electrode film layer calculated in Ah, and CAP2 representing the capacity of a second positive electrode film layer calculated in Ah; and the electrode assembly satisfies R4/R3-R2/R1 ≥ 0, R1 representing the resistance of the first positive electrode film layer calculated in Ω, R2 representing the resistance of the second positive electrode film layer calculated in Ω, R3 representing the resistance of a first negative electrode film layer calculated in mΩ, and R4 representing the resistance of a second negative electrode film layer calculated in mΩ. By means of the present application, the cycle life of the secondary battery can be significantly prolonged.
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Inventors:
ZHANG TAO (CN)
HE JIANFU (CN)
LIU QIAN (CN)
SUN XUEYANG (CN)
YE YONGHUANG (CN)
HE JIANFU (CN)
LIU QIAN (CN)
SUN XUEYANG (CN)
YE YONGHUANG (CN)
Application Number:
PCT/CN2021/123648
Publication Date:
April 20, 2023
Filing Date:
October 13, 2021
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M4/66; H01M4/70; H01M10/0525; H01M10/058
Foreign References:
| CN104412438A | 2015-03-11 | |||
| CN109273771A | 2019-01-25 | |||
| JP2014007108A | 2014-01-16 | |||
| CN113036298A | 2021-06-25 | |||
| CN112928334A | 2021-06-08 |
Other References:
See also references of EP 4195331A4
Attorney, Agent or Firm:
BEIJING EAST IP LTD. (CN)
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