US 12,113,237 B2
Separators with fibrous mat, lead acid batteries using the same, and methods and systems associated therewith
Eric H. Miller, Philpot, KY (US); Ahila Krishnamoorthy, Bangalore (IN); James P. 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 May 30, 2023, as Appl. No. 18/203,140.
Application 18/203,140 is a division of application No. 17/359,510, filed on Jun. 26, 2021, granted, now 11,664,557.
Application 17/359,510 is a division of application No. 16/484,511, granted, now 11,128,014, issued on Sep. 21, 2021, previously published as PCT/US2018/017534, filed on Feb. 9, 2018.
Prior Publication US 2023/0307788 A1, Sep. 28, 2023
Int. Cl. H01M 50/44 (2021.01); B01D 69/10 (2006.01); H01M 10/12 (2006.01); H01M 50/414 (2021.01); H01M 50/417 (2021.01); H01M 50/42 (2021.01); H01M 50/437 (2021.01); H01M 50/451 (2021.01); H01M 50/454 (2021.01); H01M 50/489 (2021.01); H01M 50/491 (2021.01)
CPC H01M 50/44 (2021.01) [B01D 69/1071 (2022.08); H01M 10/12 (2013.01); H01M 50/414 (2021.01); H01M 50/417 (2021.01); H01M 50/42 (2021.01); H01M 50/437 (2021.01); H01M 50/451 (2021.01); H01M 50/454 (2021.01); B01D 2325/028 (2013.01); B01D 2325/0281 (2022.08); B01D 2325/20 (2013.01); B01D 2325/26 (2013.01); H01M 50/489 (2021.01); H01M 50/491 (2021.01)] 19 Claims
OG exemplary drawing
 
1. A flooded lead-acid battery separator assembly comprising:
a microporous membrane which comprises a thermoplastic polymer and a mixing profile;
a nonwoven fibrous mat;
said fibrous mat being disposed adjacent to said microporous membrane, wherein said fibrous mat comprises fibers selected from the group consisting of: glass fibers, synthetic fibers, and combinations thereof;
wherein said fibrous mat may be a single layer, double layer, or other multi-layer mat; and
wherein said fibrous mat may include an additive impregnated into or coated on one or more surfaces of said fibrous mat; and
wherein an average diameter of the fibers included in the fibrous mat is 7.2 μm (±0.5 μm);
wherein said fibrous mat has: an average pore size of less than about 5 μm, and an air permeability in the range of approximately 1500 l/m2·s to approximately 2500 l/m2·s; and
wherein said microporous membrane and fibrous mat are laminated together.