Title:
SECONDARY BATTERY AND ELECTRIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/087383
Kind Code:
A1
Abstract:
Disclosed are a secondary battery and an electric device. The secondary battery comprises: a positive electrode sheet comprising a positive electrode current collector and a positive electrode active material layer disposed on the positive electrode current collector; and a negative electrode sheet comprising a negative electrode current collector and a negative electrode active material layer disposed on the negative electrode current collector. The secondary battery satisfies: 0.5≤(σ1/σ2)/CB≤9.4. According to the present application, by limiting the relationship between the surface density and a CB value, the lithium intercalation and deintercalation rates of the positive and negative electrode sheets are balanced, lithium precipitation or battery capacity reduction in the working process of the secondary battery is prevented, and the service life of the secondary battery is prolonged.
Inventors:
ZHANG YAO (CN)
WANG MINGWANG (CN)
ZHANG XUHUI (CN)
WANG BAOYU (CN)
CHEN HUI (CN)
WANG MINGWANG (CN)
ZHANG XUHUI (CN)
WANG BAOYU (CN)
CHEN HUI (CN)
Application Number:
PCT/CN2022/143654
Publication Date:
May 02, 2024
Filing Date:
December 29, 2022
Export Citation:
Assignee:
SUNWODA MOBILITY ENERGY TECH CO LTD (CN)
International Classes:
H01M10/0525; H01M4/133
Foreign References:
| CN112563559A | 2021-03-26 | |||
| CN114744147A | 2022-07-12 | |||
| CN111934027A | 2020-11-13 | |||
| CN113745646A | 2021-12-03 | |||
| CN202211327819A | 2022-10-27 |
Attorney, Agent or Firm:
PURPLEVINE INTELLECTUAL PROPERTY (SHENZHEN) CO., LTD. (CN)
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