US 12,341,161 B2
Electrode assembly, battery cell, battery and electric apparatus
Ziyu Bai, Ningde (CN); Huihui Shangguan, Ningde (CN); Xinxin Du, Ningde (CN); Yang Hu, Ningde (CN); and Daichun Tang, 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, 2021, as Appl. No. 17/543,850.
Application 17/543,850 is a continuation of application No. PCT/CN2021/083417, filed on Mar. 26, 2021.
Prior Publication US 2022/0311054 A1, Sep. 29, 2022
Int. Cl. H01M 10/0585 (2010.01); H01M 4/38 (2006.01); H01M 4/70 (2006.01); H01M 10/0525 (2010.01); H01M 50/209 (2021.01)
CPC H01M 10/0585 (2013.01) [H01M 4/38 (2013.01); H01M 4/70 (2013.01); H01M 50/209 (2021.01); H01M 10/0525 (2013.01); H01M 2220/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electrode assembly configured to be accommodated in a housing, wherein the electrode assembly comprises a positive plate and a negative plate, and the positive plate and the negative plate are stacked and wound around a winding axis;
the electrode assembly comprises an abutting region configured to abut against the housing and a non-abutting region not abutting against the housing, the abutting region and the non-abutting region respectively located on two sides of a plane of the electrode assembly, and the plane is normal to a thickness direction of the electrode assembly and passes through the winding axis;
wherein when viewing a flat area in the thickness direction of the electrode assembly,
the negative plate comprises a plurality of first negative active material layers located in the abutting region and stacked along the thickness direction, and a plurality of second negative active material layers located in the non-abutting region and stacked along the thickness direction; the positive plate comprises a plurality of first positive active material layers located in the abutting region and stacked along the thickness direction, and a plurality of second positive active material layers located in the non-abutting region and stacked along the thickness direction; and
an active material capacity per unit area of the first negative active material layers is greater than that of the second negative active material layers; and/or, an active material capacity per unit area of the first positive active material layers is less than that of the second positive active material layers.