The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 17, 2025
Filed:
Jul. 10, 2023
Contemporary Amperex Technology (Hong Kong) Limited, Hong Kong, CN;
Yuqun Zeng, Ningde, CN;
Baida Deng, Ningde, CN;
Meng Kang, Ningde, CN;
Erling Li, Ningde, CN;
Libing He, Ningde, CN;
CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong, CN;
Abstract
This application discloses a negative-electrode active material and a preparation method thereof, a secondary battery, and a battery module, a battery pack, and an apparatus that include such secondary battery. The negative-electrode active material includes a core and a coating layer covering at least part of a surface of the core, where the core includes artificial graphite, the coating layer includes amorphous carbon, a volume-based particle size distribution of the negative-electrode active material satisfies D99≤24 μm, a volume-based median particle size D50 of the negative-electrode active material satisfies 8 μm≤D50≤15 μm, D99 is a particle size corresponding to a cumulative volume distribution percentage of the negative-electrode active material reaching 99%, and D50 is a particle size corresponding to a cumulative volume distribution percentage of the negative-electrode active material reaching 50%.