Patent ID: 11923537
Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A negative electrode plate, comprising:
a negative electrode current collector, comprising an organic support layer and a metal conductive layer disposed on at least one surface of the organic support layer;
a negative electrode active material layer, comprising at least a first active material layer, the first active material layer being disposed on the surface of the metal conductive layer away from the organic support layer, and the first active material layer comprising a first active material;
wherein in a first cross section in a thickness direction of the negative electrode plate, the first active material has a particle size a in a direction parallel to the metal conductive layer, the first active material has a particle size b in the thickness direction, and a and b satisfy 0.8≤a/b≤20; and
in a second cross section in the thickness direction of the negative electrode plate, the first active material has a particle size c in the direction parallel to the metal conductive layer, the first active material has a particle size din the thickness direction, and c and d satisfy 0.8≤c/d≤20; and
the first cross section is parallel to a first direction, the second cross section is parallel to a second direction, and the first cross section intersects with the second cross section; and
wherein the metal conductive layer has a thickness of 300 nm to 2 μm; and
wherein the organic support layer comprises one or more of polypropylene and polyethylene; and
wherein the negative electrode active material layer further comprises a second active material layer, the second active material layer is disposed on the surface of the first active material layer away from the metal conductive layer, and the second active material layer comprises a second active material; and
the volume average particle size Dv501 of the first active material, the volume average particle size Dv502 of the second active material, and the Young's modulus E of the negative electrode current collector satisfy:
|Dv501−Dv502|/E≤2, wherein Dv501 and Dv502 are in μm, and E is in GPa.