US 12,009,548 B2
Battery cell structure and electrochemical device
Xingguo Jiang, Ningde (CN); Yan Xu, Ningde (CN); Jiawei Wang, Ningde (CN); and Xuchen Lian, Ningde (CN)
Assigned to NINGDE AMPEREX TECHNOLOGY LIMITED, Fujian (CN)
Filed by NINGDE AMPEREX TECHNOLOGY LIMITED, Ningde (CN)
Filed on Jun. 29, 2021, as Appl. No. 17/362,864.
Claims priority of application No. 202010752909.8 (CN), filed on Jul. 30, 2020.
Prior Publication US 2022/0037748 A1, Feb. 3, 2022
Int. Cl. H01M 50/538 (2021.01); H01M 50/102 (2021.01); H01M 50/586 (2021.01)
CPC H01M 50/538 (2021.01) [H01M 50/102 (2021.01); H01M 50/586 (2021.01)] 15 Claims
OG exemplary drawing
 
1. A battery cell structure, comprising:
a first electrode assembly formed by winding a first electrode plate, a first separator, a second separator, and a second electrode plate, the first electrode assembly comprises a first lateral surface and a second lateral surface opposite to the first lateral surface, the first electrode plate includes a positive active layer, and the second electrode plate includes a negative active layer;
a second electrode assembly formed by winding a third electrode plate, a third separator, a fourth separator, and a fourth electrode plate, the second electrode assembly comprises a third lateral surface disposed adjacent to the first lateral surface of the first electrode assembly, the third lateral surface of the second electrode assembly facing the first lateral surface of the first electrode assembly;
an insulation layer disposed between the first lateral surface of the first electrode assembly and the third lateral surface of the second electrode assembly, and in direct contact with both the first lateral surface of the first electrode assembly and the third lateral surface of the second electrode assembly, wherein the insulation layer is in physical contact with all of the first lateral surface of the first electrode assembly and a portion that is less than all of the third lateral surface of the second electrode assembly;
a first tab electrically connected to the third electrode plate and a second tab electrically connected to the fourth electrode plate;
the first tab and the second tab extend out of the third lateral surface of the second electrode assembly, and extend through the first lateral surface and the second lateral surface of the first electrode assembly;
wherein, both the first tab and the second tab extend from the second electrode assembly to the first electrode assembly through the first lateral surface of the first electrode assembly and the third lateral surface of the second electrode assembly; and
the first tab is electrically connected to the first electrode plate located on the second lateral surface of the first electrode assembly.