US 12,334,586 B2
Composite layers or separators for lead acid batteries
Ahila Krishnamoorthy, Bangalore (IN); Kumar Manickam, Bangalore (IN); and Robert Saffel, Rockport, IN (US)
Assigned to DARAMIC, LLC, Charlotte, NC (US)
Filed by Daramic, LLC, Charlotte, NC (US)
Filed on May 15, 2023, as Appl. No. 18/197,537.
Application 18/197,537 is a division of application No. 17/498,778, filed on Oct. 12, 2021, granted, now 11,652,260.
Application 17/498,778 is a division of application No. 15/922,052, filed on Mar. 15, 2018, granted, now 11,145,934, issued on Oct. 12, 2021.
Claims priority of application No. 201731009500 (IN), filed on Mar. 18, 2017.
Prior Publication US 2023/0344079 A1, Oct. 26, 2023
Int. Cl. H01M 50/44 (2021.01); H01M 4/14 (2006.01); H01M 50/403 (2021.01); H01M 50/429 (2021.01); H01M 50/437 (2021.01); H01M 50/446 (2021.01); H01M 50/449 (2021.01); H01M 50/454 (2021.01); H01M 50/489 (2021.01); H01M 4/02 (2006.01); H01M 10/12 (2006.01)
CPC H01M 50/44 (2021.01) [H01M 4/14 (2013.01); H01M 50/403 (2021.01); H01M 50/4295 (2021.01); H01M 50/437 (2021.01); H01M 50/446 (2021.01); H01M 50/449 (2021.01); H01M 50/454 (2021.01); H01M 50/489 (2021.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01); H01M 10/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A battery separator comprising a porous polymer separator layer, and a composite layer laminated onto the porous polymer separator layer, the composite layer-comprises silica and fibers, wherein the fibers are multiple strands twisted together to form a bunch and bonded with a binder, and further comprising a coating of a non-ionic surfactant on at least one surface of the composite layer.