US 11,870,029 B2
Separator and energy storage device
Wei Cui, Ningde (CN); Xinghua Tao, Ningde (CN); and Cong Cheng, Ningde (CN)
Assigned to NINGDE AMPEREX TECHNOLOGY LIMITED, Fujian (CN)
Filed by NINGDE AMPEREX TECHNOLOGY LIMITED, Ningde (CN)
Filed on Mar. 17, 2021, as Appl. No. 17/204,739.
Application 17/204,739 is a continuation of application No. 16/174,234, filed on Oct. 29, 2018, granted, now 10,991,927.
Claims priority of application No. 201810323660.1 (CN), filed on Apr. 11, 2018.
Prior Publication US 2021/0203036 A1, Jul. 1, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 50/414 (2021.01); H01M 10/0525 (2010.01); H01M 50/446 (2021.01); H01M 50/423 (2021.01); H01M 50/417 (2021.01); H01M 50/42 (2021.01); H01M 50/426 (2021.01); H01M 50/429 (2021.01); H01M 50/451 (2021.01); H01M 50/494 (2021.01); H01M 50/489 (2021.01); H01M 50/457 (2021.01)
CPC H01M 10/0525 (2013.01) [H01M 50/414 (2021.01); H01M 50/417 (2021.01); H01M 50/42 (2021.01); H01M 50/423 (2021.01); H01M 50/426 (2021.01); H01M 50/429 (2021.01); H01M 50/446 (2021.01); H01M 50/451 (2021.01); H01M 50/457 (2021.01); H01M 50/489 (2021.01); H01M 50/494 (2021.01)] 19 Claims
OG exemplary drawing
 
1. A battery separator, comprising:
a first porous substrate; and
a second porous substrate arranged on at least one surface of the first porous substrate; wherein,
an elongation at a break of the second porous substrate is greater than an elongation at a break of the first porous substrate in at least one of a machine direction or a transverse direction of the battery separator; and
the first porous substrate comprises one or more selected from the group consisting of polypropylene, polyethylene, polyethylene terephthalate, polyimide, and polyphthalaldehyde phenyl diamine.