公开(公告)号：US11646415B2

公开(公告)日：2023-05-09

申请号：US17547278

申请日：2021-12-10

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Maohua Li ,  Chuanmiao Yan ,  Xin Sun

IPC: H01M4/525 ,  H01M4/133 ,  H01M4/134 ,  H01M4/505 ,  H01M4/62 ,  H01M4/02

CPC classification number: H01M4/525 ,  H01M4/133 ,  H01M4/134 ,  H01M4/505 ,  H01M4/622 ,  H01M4/625 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/20

Abstract: The present application discloses a secondary battery and a battery module, a battery pack and an apparatus containing the secondary battery. The secondary battery comprises a positive electrode plate, a negative electrode plate, a separator and an electrolyte; the positive electrode plate comprising a positive electrode current collector and a positive electrode film disposed on at least one surface of the positive electrode current collector and comprising a positive electrode active material; the negative electrode plate comprising a negative electrode current collector and a negative electrode film disposed on at least one surface of the negative electrode current collector and comprising a negative electrode active material; wherein the positive electrode active material comprises one or more of lithium nickel cobalt manganese oxides and lithium nickel cobalt aluminium oxides; the negative electrode active material comprises a silicon-based material and a carbon material; and the secondary battery satisfies: 1.05≤K≤1.25.