US 12,294,081 B2
Negative electrode plate, secondary battery, and apparatus containing the secondary battery
Jing Li, Ningde (CN); Yang Zhang, Ningde (CN); Qingrui Xue, Ningde (CN); and Wei Li, Ningde (CN)
Assigned to Contemporary Amperex Technology (HONG KONG) Limited, Hong Kong (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed on Dec. 7, 2023, as Appl. No. 18/531,739.
Application 18/531,739 is a continuation of application No. 17/547,265, filed on Dec. 10, 2021, granted, now 11,923,537.
Application 17/547,265 is a continuation of application No. PCT/CN2020/087438, filed on Apr. 28, 2020.
Claims priority of application No. 202010201599.0 (CN), filed on Mar. 20, 2020.
Prior Publication US 2024/0250247 A1, Jul. 25, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/36 (2006.01); H01M 4/02 (2006.01); H01M 4/587 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 4/366 (2013.01) [H01M 4/587 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 2220/20 (2013.01)] 20 Claims
OG exemplary drawing
 
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 d in 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;
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.