US 12,451,491 B1
Electrode sheet, preparation method therefor, battery cell, battery, and electric device
Xing Ji, Ningde (CN); and Ting Li, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed on Jun. 30, 2025, as Appl. No. 19/254,021.
Application 19/254,021 is a continuation of application No. PCT/CN2024/092628, filed on May 11, 2024.
Claims priority of application No. 202310579352.6 (CN), filed on May 22, 2023.
Int. Cl. H01M 4/62 (2006.01); B26D 3/08 (2006.01); H01M 4/04 (2006.01); H01M 4/66 (2006.01)
CPC H01M 4/628 (2013.01) [B26D 3/08 (2013.01); H01M 4/0404 (2013.01); H01M 4/661 (2013.01); H01M 4/667 (2013.01); H01M 4/668 (2013.01); H01M 2220/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electrode sheet, comprising a current collector, an active material layer, a first insulating layer, and a second insulating layer; wherein
the current collector comprises a main body portion and a tab, the tab extends from a first end of the main body portion, the first end is an end of the main body portion in a first direction, the main body portion comprises a coated region and a transition region, and the transition region is disposed between the coated region and the tab;
the active material layer is disposed on a surface of the coated region;
the first insulating layer is disposed on an end face of the main body portion at the first end; and
at least part of the second insulating layer is disposed on a surface of the transition region, the second insulating layer comprises a thermoplastic polymer, volumetric particle size distribution Dv50 of the thermoplastic polymer is 6 μm to 10 μm, and a maximum particle size Dmax of the thermoplastic polymer is 90 μm to 110 μm.