US 11,862,768 B2
Winding type electrode assembly, battery cell, battery and power consumption device
Huihui Shangguan, Ningde (CN); Daichun Tang, Ningde (CN); Xinxin Du, Ningde (CN); Ziyu Bai, Ningde (CN); and Ruihuan Qin, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed on Dec. 10, 2021, as Appl. No. 17/547,535.
Application 17/547,535 is a continuation of application No. PCT/CN2021/079604, filed on Mar. 8, 2021.
Prior Publication US 2022/0285737 A1, Sep. 8, 2022
Int. Cl. H01M 10/0587 (2010.01); H01M 50/538 (2021.01)
CPC H01M 10/0587 (2013.01) [H01M 50/538 (2021.01); H01M 2220/20 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A winding type electrode assembly, comprising:
a positive electrode plate comprising a first positive winding end portion, a second positive winding end portion and a positive winding middle section, wherein the first positive winding end portion and the second positive winding end portion are connected to two ends of the positive winding middle section respectively, the first positive winding end portion is a positive winding starting section, and the second positive winding end portion is a positive winding ending section; and
a negative electrode plate comprising a first portion and a second portion connected to each other, wherein the first portion is arranged opposite to the first positive winding end portion, and the second portion is arranged opposite to the positive winding middle section; and
in a winding axial direction of the winding type electrode assembly, a negative active material layer of the negative electrode plate exceeds a positive active material layer of the positive electrode plate, a maximum width of a negative active material layer of the first portion is H1, a minimum width of a positive active material layer of the first positive winding end portion is L1, a maximum width of a negative active material layer of the second portion is H2, a minimum width of a positive active material layer of the positive winding middle section is L2, and H1−L1>H2−L2.