	US 12,355,076 B2
	Secondary battery, and battery module, battery pack and apparatus comprising the same
Danfeng Wang, Ningde (CN); and Chuanmiao Yan, 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 Oct. 27, 2021, as Appl. No. 17/512,103.
Application 17/512,103 is a continuation of application No. PCT/CN2020/127897, filed on Nov. 10, 2020.
Claims priority of application No. 201911230498.X (CN), filed on Dec. 4, 2019.
Prior Publication US 2022/0052341 A1, Feb. 17, 2022
Int. Cl. H01M 4/48 (2010.01); H01M 4/131 (2010.01); H01M 4/133 (2010.01); H01M 4/36 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/583 (2010.01); H01M 4/587 (2010.01); H01M 4/62 (2006.01); H01M 4/64 (2006.01); H01M 4/02 (2006.01); H01M 10/0525 (2010.01)

CPC H01M 4/483 (2013.01) [H01M 4/131 (2013.01); H01M 4/133 (2013.01); H01M 4/364 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/583 (2013.01); H01M 4/587 (2013.01); H01M 4/622 (2013.01); H01M 4/625 (2013.01); H01M 4/64 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01); H01M 10/0525 (2013.01)]

19 Claims

1. A secondary battery, comprising a negative electrode plate, wherein the negative electrode plate comprises a negative electrode current collector and a negative electrode film disposed on at least one surface of the negative electrode current collector, and the negative electrode film comprises a negative electrode active material, a conductive agent and a binder,

the negative electrode active material comprises particles comprising particles of SiOx (0<x<2) and particles of graphite, wherein the particles of SiOx and the particles of graphite are physically mixed together;

the average particle diameter Dv50 of the particles of SiOx is from 5 μm to 8 μm;

the average particle diameter Dv50 of the particles of graphite is from 10 μm to 20 μm;

the average particle diameter Dv50 of the particles of the negative electrode active material is from 8 μm to 14 μm;

and the conductive agent comprises carbon nanotubes whose aspect ratio is greater than (3000:1) and less than or equal to (20000:1).