US 11,658,366 B2
Electrochemical device
Silin Huang, Fujian (CN); Huixin Wang, Fujian (CN); Sheng Cheng, Fujian (CN); and Hongming Yu, Fujian (CN)
Assigned to Dongguan Poweramp Technology Limited, Dongguan (CN)
Filed by Ningde Amperex Technology Limited, Fujian (CN)
Filed on Nov. 4, 2019, as Appl. No. 16/672,550.
Claims priority of application No. 201910785226.X (CN), filed on Aug. 23, 2019.
Prior Publication US 2021/0057700 A1, Feb. 25, 2021
Int. Cl. H01M 50/46 (2021.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01); H01M 50/457 (2021.01); H01M 50/449 (2021.01)
CPC H01M 50/461 (2021.01) [H01M 4/623 (2013.01); H01M 10/0525 (2013.01); H01M 50/449 (2021.01); H01M 50/457 (2021.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An electrochemical device, comprising:
a positive electrode;
a negative electrode;
and a separator disposed between the positive electrode and the negative electrode,
wherein the separator comprises a porous substrate, a first coating layer and a second coating layer,
the first coating layer and the second coating layer are disposed on a surface of the porous substrate,
the first coating layer includes a first binder, and the second coating layer includes a second binder,
wherein an adhesive force between the first coating layer and the positive electrode or between the first coating layer and the negative electrode is greater than an adhesive force between the second coating layer and the positive electrode or between the second coating layer and the negative electrode, and
wherein a granularity of the first binder is less than a granularity of the second binder.