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:
Apr. 18, 2023
Filed:
Jun. 29, 2022
Contemporary Amperex Technology Co., Limited, Ningde, CN;
CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde, CN;
Abstract
A secondary battery, a preparation method thereof, and an apparatus including the secondary battery are described. Specifically, the secondary battery includes a negative-electrode plate, where the negative-electrode plate is of a multi-layer structure, and the multi-layer structure sequentially includes: a negative-electrode current collector, a primer layer, and a negative-electrode film layer; the negative-electrode film layer includes a first negative-electrode film layer and a second negative-electrode film layer, and the first negative-electrode film layer is located between the primer layer and the second negative-electrode film layer; and the first negative-electrode film layer includes a first negative-electrode active material, the first negative-electrode active material includes first artificial graphite, at least some particles in the first artificial graphite are secondary particles, and a quantity proportion A of the number of the secondary particles to a total number of particles of the first negative-electrode active material satisfies A≥50%.