US 11,749,828 B2
Wound cell and battery using the same
Xinru Su, Ningde (CN); Baozhang Li, Ningde (CN); Xiao Chen, Ningde (CN); and Chang Chuan Shi, Ningde (CN)
Assigned to Ningde Amperex Technology Limited, Ningde (CN)
Filed by Ningde Amperex Technology Limited, Ningde (CN)
Filed on Jun. 19, 2020, as Appl. No. 16/906,437.
Claims priority of application No. 201911378991.6 (CN), filed on Dec. 27, 2019.
Prior Publication US 2021/0202977 A1, Jul. 1, 2021
Int. Cl. H01M 10/04 (2006.01); H01M 50/474 (2021.01); H01M 50/105 (2021.01); H01M 50/46 (2021.01); H01M 10/052 (2010.01); H01M 10/42 (2006.01); H01M 10/0587 (2010.01); H01M 50/126 (2021.01)
CPC H01M 10/0431 (2013.01) [H01M 10/052 (2013.01); H01M 10/0587 (2013.01); H01M 10/4235 (2013.01); H01M 50/105 (2021.01); H01M 50/126 (2021.01); H01M 50/461 (2021.01); H01M 50/474 (2021.01); H01M 2220/30 (2013.01); Y02E 60/10 (2013.01); Y02P 70/50 (2015.11)] 20 Claims
OG exemplary drawing
 
1. A wound cell comprising:
a first electrode plate, a first separator, a second electrode plate and a second separator that are stacked in that order and wound together;
wherein the first electrode plate comprises a first current collector and a first active material partially coated on both surfaces of the first current collector;
wherein a first surface of the first electrode plate is provided with a first active material area coated with the first active material and a first current collector area without coating of the first active material, and the first current collector area being located on an inner side of an outermost layer of the wound cell;
wherein a second surface of the first electrode plate is provided with a second active material area coated with the first active material and a second current collector area without coating of the first active material; and
wherein, when the first electrode plate is wound, the second current collector area and the first current collector area are adjacent to and opposite to each other, and the first current collector area and the second current collector area are bonded together by a first bonding member.