Title:
SECONDARY BATTERY AND ELECTRIC APPARATUS
Document Type and Number:
WIPO Patent Application WO/2024/082076
Kind Code:
A1
Abstract:
Disclosed are a secondary battery and an electric apparatus. The secondary battery comprises a positive electrode pole piece, a negative electrode pole piece, and an electrolyte solution. The positive electrode pole piece comprises a positive electrode film layer containing a positive electrode active material, the negative electrode pole piece comprises a negative electrode film layer containing a negative electrode active material, and the secondary battery satisfies the following relational expression: 0.22 ≤ 3 × (A1/A2) × (B2-B1) / (B1+B2) ≤ 1.55. A1 is the particle size Dn10 of the positive electrode active material corresponding to the cumulative percentage of the number of particles in the positive electrode active material calculated starting from small particles reaching 10% of the total number of particles, and the unit is μm. A2 is the particle size Dn10 corresponding to the cumulative percentage of the number of particles of the negative electrode active material calculated starting from small particles reaching 10% of the total number of particles, and the unit is μm. B1 is the porosity of the positive electrode film layer, and B2 is the porosity of the negative electrode film layer. The secondary battery has a good cycle life and excellent fast charging capabilities.
Inventors:
XIAO DEJUN (CN)
CHEN JIAHUA (CN)
LIU QIAN (CN)
LI QUANGUO (CN)
SUN JINGXUAN (CN)
CHEN JIAHUA (CN)
LIU QIAN (CN)
LI QUANGUO (CN)
SUN JINGXUAN (CN)
Application Number:
PCT/CN2022/125551
Publication Date:
April 25, 2024
Filing Date:
October 17, 2022
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M10/0525; H01M4/13
Foreign References:
| CN110197889A | 2019-09-03 | |||
| CN114303257A | 2022-04-08 | |||
| CN114914547A | 2022-08-16 | |||
| CN111384374A | 2020-07-07 | |||
| US20160164135A1 | 2016-06-09 | |||
| JP2017068939A | 2017-04-06 | |||
| JP2012129070A | 2012-07-05 | |||
| GB190772009A | ||||
| GB195872004D0 |
Attorney, Agent or Firm:
ACIP LAW OFFICES (CN)
Download PDF: