公开(公告)号：US11824167B2

公开(公告)日：2023-11-21

申请号：US17345077

申请日：2021-06-11

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Qing Xia ,  Jiang Liu ,  Guobao Wang ,  Xiaomei Liu ,  Yongshou Lin

IPC: H01M10/0587 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/62 ,  H01M4/02

CPC classification number: H01M10/0587 ,  H01M4/366 ,  H01M4/62 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: The present application discloses a wound electrode assembly, wherein the negative electrode plate thereof includes a negative electrode current collector and a negative active material layer which includes a negative active material disposed on two opposite surfaces of the negative electrode current collector; and the two negative active material layers respectively include active an material layer in an unpaired region and an active material layer in a paired region distributed successively in the length direction of the negative electrode plate, and two active material layers in the unpaired regions are arranged at both ends in the length direction of the negative electrode plate, and a first metallic lithium layer is disposed on the surface of one or both of the active material layers in the unpaired regions, so that to form a first lithium pre-intercalation compound in either or both of the active material layers in the unpaired regions.