US 11,916,252 B2
Vapor pressure barriers for lead acid batteries for improved water loss performance, separators, systems, and methods of manufacture and use thereof
Margaret R. Roberts, Owensboro, KY (US); Jeffrey K. Chambers, Philpot, KY (US); James Perry, Utica, KY (US); and J. Kevin Whear, Utica, KY (US)
Assigned to Daramic, LLC, Charlotte, NC (US)
Filed by Daramic, LLC, Charlotte, NC (US)
Filed on Oct. 6, 2020, as Appl. No. 17/063,735.
Application 17/063,735 is a division of application No. 15/054,821, filed on Feb. 26, 2016.
Claims priority of provisional application 62/121,112, filed on Feb. 26, 2015.
Prior Publication US 2021/0020883 A1, Jan. 21, 2021
Int. Cl. H01M 50/383 (2021.01); H01M 10/12 (2006.01)
CPC H01M 50/383 (2021.01) [H01M 10/12 (2013.01); H01M 2220/20 (2013.01); Y02E 60/10 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A battery separator comprising an oil layer on a porous membrane or mat, wherein the oil layer comprises one or more oils selected from the group consisting of naturally derived oils and synthetically derived oils, wherein
the oil layer further comprises a material that is soluble in a lead acid battery electrolyte and capable of encapsulating the one or more oils.