US 11,881,593 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 Feb. 26, 2016, as Appl. No. 15/054,821.
Claims priority of provisional application 62/121,112, filed on Feb. 26, 2015.
Prior Publication US 2016/0254509 A1, Sep. 1, 2016
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)] 13 Claims
OG exemplary drawing
1. A lead acid battery that exhibits outgassing of H2 and O2 gases, the lead acid battery comprising a vapor pressure barrier in a head space of the lead acid battery, the vapor pressure barrier comprising:
a porous membrane with an oil layer on its surface, or a non-woven layer with an oil layer on its surface.