Patent ID: 11862768
Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
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.