公开(公告)号：US11862768B2

公开(公告)日：2024-01-02

申请号：US17547535

申请日：2021-12-10

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Huihui Shangguan ,  Daichun Tang ,  Xinxin Du ,  Ziyu Bai ,  Ruihuan Qin

IPC: H01M10/0587 ,  H01M50/538

CPC classification number: H01M10/0587 ,  H01M50/538 ,  H01M2220/20

Abstract: The embodiments of the present application provide a winding type electrode assembly including a positive electrode plate and a negative electrode plate; the positive electrode plate includes a first positive winding end portion and a positive winding middle section; the negative electrode plate includes a first portion and a second portion; and an active material layer of the negative electrode plate exceeds an active material layer of the positive electrode plate, and a difference between a maximum width of a negative active material layer of the first portion and a minimum width of a positive active material layer of the first positive winding end portion is larger than a difference between a maximum width of a negative active material layer of the second portion and a minimum width of a positive active material layer of the positive winding middle section.