US 12,278,341 B2
Electrode assembly, battery cell, battery, and electrical device
Wen Chang, Ningde (CN); Chenghua Fu, Ningde (CN); Suogang Guo, Ningde (CN); Yonghuang Ye, Ningde (CN); Chang Zhu, Ningde (CN); Yan Zhang, Ningde (CN); and Wenge Han, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed on Aug. 29, 2024, as Appl. No. 18/819,605.
Application 18/819,605 is a continuation of application No. PCT/CN2023/078466, filed on Feb. 27, 2023.
Claims priority of application No. 202221023643.4 (CN), filed on Apr. 29, 2022.
Prior Publication US 2024/0421361 A1, Dec. 19, 2024
Int. Cl. H01M 10/058 (2010.01); H01M 10/04 (2006.01); H01M 10/0525 (2010.01); H01M 10/0587 (2010.01); H01M 50/538 (2021.01)
CPC H01M 10/0587 (2013.01) [H01M 10/0431 (2013.01); H01M 10/0525 (2013.01); H01M 10/058 (2013.01); H01M 50/538 (2021.01)] 17 Claims
OG exemplary drawing
 
1. An electrode assembly, comprising a negative electrode plate, a positive electrode plate, and a separator disposed between the negative electrode plate and the positive electrode plate, wherein:
the negative electrode plate, the positive electrode plate, and the separator are wound together around a winding axis to form the electrode assembly;
the negative electrode plate is a continuous negative electrode plate extending from a foremost winding end to a hindmost winding end along a winding direction, the negative electrode plate comprising a first straight portion, a first curved portion, a second straight portion, a second curved portion, a third straight portion, a third curved portion, and a fourth straight portion connected in sequence, the first straight portion, the second straight portion, the third straight portion, and the fourth straight portion being parallel with each other; and
the positive electrode plate comprises:
a continuous positive electrode plate disposed along the winding direction;
a first single-sheet positive electrode plate disposed along the winding direction apart from the continuous positive electrode plate and disposed between the first straight portion and the second straight portion of the negative electrode plate;
a second single-sheet positive electrode plate disposed along the winding direction apart from the continuous positive electrode plate and disposed between the first straight portion and the third straight portion of the negative electrode plate; and
a third single-sheet positive electrode plate disposed along the winding direction apart from the continuous positive electrode plate and disposed between the second straight portion and the fourth straight portion of the negative electrode plate, the first single-sheet positive electrode plate, the second single-sheet positive electrode plate, and the third single-sheet positive electrode plate being not connected with each other along the winding direction but being parallel with each other.