US 12,034,155 B1
Secondary battery and electrical device
Dejun Xiao, Ningde (CN); Jiahua Chen, Ningde (CN); Qian Liu, Ningde (CN); Quanguo Li, Ningde (CN); and Jingxuan Sun, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed on Jan. 29, 2024, as Appl. No. 18/426,295.
Application 18/426,295 is a continuation of application No. PCT/CN2022/125551, filed on Oct. 17, 2022.
Int. Cl. H01M 4/36 (2006.01); H01M 4/62 (2006.01); H01M 10/28 (2006.01); H01M 4/02 (2006.01)
CPC H01M 4/366 (2013.01) [H01M 4/623 (2013.01); H01M 4/625 (2013.01); H01M 10/286 (2013.01); H01M 2004/021 (2013.01); H01M 2220/20 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A secondary battery, comprising:
a cathode sheet, comprising a cathode film layer containing a cathode active material;
an anode sheet, comprising an anode film layer containing an anode active material; and
an electrolyte;
wherein the secondary battery meets a following function relationship:
0.22≤3×(A1/A2)×(B2−B1)/(B1+B2)≤1.55;
wherein A1 is a particle size Dn10 of the cathode active material corresponding to that a cumulative percentage of a particle number sequentially counted from a small particle in the cathode active material reaches 10% of a total particle number, in m;
A2 is a particle size Dn10 of the anode active material corresponding to that a cumulative percentage of a particle number sequentially counted from a small particle in the anode active material reaches 10% of the total particle number, in m;
B1 is a porosity of the cathode film layer; and
B2 is a porosity of the anode film layer.