US 12,294,090 B2
Electrode plate, electrochemical apparatus, and apparatus thereof
Wei Li, Ningde (CN); Jing Li, Ningde (CN); Qingrui Xue, Ningde (CN); Zige Zhang, Ningde (CN); Yang Zhang, Ningde (CN); and Xianwei Yang, Ningde (CN)
Assigned to Contemporary Amperex Technology (Hong Kong) Limited, Hong Kong (CN)
Filed by Contemporary Amperex Technology Co., Limited, Ningde (CN)
Filed on Dec. 2, 2021, as Appl. No. 17/540,263.
Application 17/540,263 is a continuation of application No. PCT/CN2019/125061, filed on Dec. 13, 2019.
Claims priority of application No. 201910580127.8 (CN), filed on Jun. 28, 2019.
Prior Publication US 2022/0093932 A1, Mar. 24, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/66 (2006.01); H01M 4/02 (2006.01); H01M 4/62 (2006.01)
CPC H01M 4/667 (2013.01) [H01M 4/625 (2013.01); H01M 4/661 (2013.01); H01M 4/663 (2013.01); H01M 4/668 (2013.01); H01M 2004/021 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An electrode plate, comprising a current collector, an electrode active material layer provided on at least one surface of the current collector, and an electrical connection member electrically connected to the current collector, wherein
the electrode active material layer is provided on a main body portion of the current collector at a film zone, the electrical connection member and the current collector are welded and connected at an edge of the current collector at a transfer welding zone, and an extension zone is of the current collector between the film zone and the transfer welding zone, and is coated with no electrode active material layer;
the current collector comprises a support layer and a conductive layer provided on at least one surface of the support layer, a single-sided thickness D2 of the conductive layer satisfies: 30 nm≤D2≤3 μm, and the support layer is a polymer material layer or a polymer composite material layer; and
a conductive primer coating layer containing a binder and a conductive material is separately provided between the current collector and the electrode active material layer in the film zone of the current collector and on a surface of the extension zone of the current collector; and
viewed in a width direction of a coated surface of the electrode plate, the electrode active material layer based on compacted density comprises 2n+1 zones, and compacted density of a middle zone is greater than compacted density of zones on both sides, wherein n=1, 2, or 3.