US 12,463,309 B2
Electrode assembly, battery cell, battery, and electric apparatus
Huihui Shangguan, Ningde (CN); Haizu Jin, Ningde (CN); Daichun Tang, Ningde (CN); Xinxin Du, Ningde (CN); Ziyu Bai, Ningde (CN); and Ruihuan Qin, 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 Jan. 26, 2023, as Appl. No. 18/159,684.
Application 18/159,684 is a continuation of application No. PCT/CN2021/127714, filed on Oct. 29, 2021.
Claims priority of application No. 202023344172.0 (CN), filed on Dec. 31, 2020.
Prior Publication US 2023/0170592 A1, Jun. 1, 2023
Int. Cl. H01M 50/586 (2021.01); H01M 50/538 (2021.01); H01M 50/593 (2021.01)
CPC H01M 50/593 (2021.01) [H01M 50/538 (2021.01); H01M 50/586 (2021.01); H01M 2220/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electrode assembly, comprising:
a first electrode plate comprising a first body portion, a first tab, and a first insulation portion, the first body portion having a first end portion in a first direction, the first tab being coupled to the first end portion, the first body portion comprising a first current collection zone, a first active material layer, and a protective layer, the first active material layer being applied on a surface of the first current collection zone, the protective layer being applied on a surface of the first current collection zone and coupled to the first active material layer, a first surface of the protective layer parallel to the first direction and away from the first current collection zone being coplanar with a second surface of the first active material layer parallel to the first direction and away from the first current collection zone, and the first surface and the second surface not overlapping with each other in a stacking direction perpendicular to the first direction;
a second electrode plate comprising a second body portion, a second tab, and a second insulation portion coupled to the second body portion, the first body portion and the second body portion being stacked in the stacking direction perpendicular to the first direction, the second body portion having a second end portion located at a same side as the first tab in the first direction, and the second insulation portion covering at least part of the second end portion; and
a separator configured to separate the first electrode plate and the second electrode plate;
wherein:
the first insulation portion comprises a first coverage zone and a first connection zone coupled to the first coverage zone, the first coverage zone is disposed on a side of the first body portion in the first direction and covers an end surface of the protective layer, and the first connection zone is fixed to the protective layer;
the second insulation portion comprises a second coverage zone and a second connection zone coupled to the second coverage zone, the second coverage zone is disposed on a side of the second body portion in the first direction and covers at least part of the second end portion;
the second body portion comprises a second current collection zone and a second active material layer, the second active material layer is applied on a surface of the second current collection zone;
the second coverage zone is located between the second tab and the second current collection zone; and
the second connection zone is connected to the second body portion, and a ratio of a size of the second connection zone in the first direction to a size of the second body portion in the first direction ranges from 0.5% to 6%.