US 12,266,765 B2
Electrode assembly, battery cell, battery, and manufacturing method and device for electrode assembly
Hu Xu, Liyang (CN); Haizu Jin, Liyang (CN); Jiang Liu, Liyang (CN); Xing Li, Liyang (CN); Chengdu Liang, Liyang (CN); and Yuqun Zeng, Liyang (CN)
Assigned to JIANGSU CONTEMPORARY AMPEREX TECHNOLOGY LIMITED, Liyang (CN)
Filed by JIANGSU CONTEMPORARY AMPEREX TECHNOLOGY LIMITED, Liyang (CN)
Filed on Apr. 12, 2022, as Appl. No. 17/718,862.
Application 17/718,862 is a continuation of application No. PCT/CN2021/085850, filed on Apr. 7, 2021.
Prior Publication US 2022/0328884 A1, Oct. 13, 2022
Int. Cl. H01M 10/0587 (2010.01); H01M 10/04 (2006.01)
CPC H01M 10/0587 (2013.01) [H01M 10/0431 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An electrode assembly, comprising a positive electrode plate and a negative electrode plate, the positive electrode plate and the negative electrode plate being wound along a winding direction to form a winding structure;
the positive electrode plate comprising a plurality of first active substance layer regions and at least one first inactive substance layer region; in an axial direction of the winding structure, the first inactive substance layer region being located between two adjacent first active substance layer regions;
wherein the first inactive substance layer region is provided with a first guide flow through hole, and the first guide flow through hole is configured to penetrate both sides in a thickness direction of the positive electrode plate;
wherein the negative electrode plate is provided with a second guide flow through hole, and the second guide flow through hole is configured to penetrate both sides in a thickness direction of the negative electrode plate;
the winding structure is provided with a guide flow channel that allows an electrolyte to flow from the outside of the winding structure to the inside of the winding structure;
a plurality of the first guide flow through holes and a plurality of the second guide flow through holes form the guide flow channel;
wherein the winding structure comprises an outer ring portion and an inner ring portion that are concentrically provided, and the inner ring portion is located inside the outer ring portion; the first guide flow through hole is provided in the positive electrode plate in the outer ring portion, the second guide flow through hole is provided in the negative electrode plate in the outer ring portion, and the guide flow channel is formed in the outer ring portion; or,
the winding structure comprises an outer ring portion and an inner ring portion that are concentrically provided, and the inner ring portion is located inside the outer ring portion; the positive electrode plates in the outer ring portion and the inner ring portion are both provided with the first guide flow through holes, and the negative electrode plates in the outer ring portion and the inner ring portion are both provided with the second guide flow through holes, the guide flow channel is formed in the outer ring portion and the inner ring portion; wherein, an aperture of the first guide flow through hole in the inner ring portion is smaller than an aperture of the first guide flow through hole in the outer ring portion, and an aperture of the second guide flow through hole in the inner ring portion is smaller than an aperture of the second guide flow through hole in the outer ring portion.