US 12,294,082 B2
Negative electrode and electrochemical apparatus containing same, and electronic apparatus
Ting Yi, Fujian (CN); Hang Cui, Fujian (CN); and Yuansen Xie, Fujian (CN)
Assigned to NINGDE AMPEREX TECHNOLOGY LIMITED, Ningde (CN)
Filed by NINGDE AMPEREX TECHNOLOGY LIMITED, Fujian (CN)
Filed on Mar. 29, 2022, as Appl. No. 17/707,129.
Application 17/707,129 is a continuation of application No. PCT/CN2019/130465, filed on Dec. 31, 2019.
Claims priority of application No. 201911267132.X (CN), filed on Dec. 11, 2019.
Prior Publication US 2022/0223851 A1, Jul. 14, 2022
Int. Cl. H01M 4/38 (2006.01); H01M 4/583 (2010.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/386 (2013.01) [H01M 4/583 (2013.01); H01M 4/623 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A negative electrode, comprising:
a negative current collector;
a first negative active material layer, wherein the first negative active material layer is arranged on one side of a first portion of the negative current collector; and
a second negative active material layer, wherein the second negative active material layer is arranged on two sides of a second portion of the negative current collector, wherein the second portion of the negative current collector is different from the first portion of the negative current collector;
wherein a ratio of a weight per unit area of the first negative active material layer to a weight per unit area of the second negative active material layer on the negative current collector is 0.47 to 0.52, and a ratio of a compacted density of the first negative active material layer to a compacted density of the second negative active material layer is 0.9 to 1.1;
wherein a thickness of the first negative active material layer is 40 μm to 60 μm, and a thickness of the second negative active material layer on each of the two sides of the second portion is 40 μm to 60 μm.