US 11,705,583 B2
Battery separators with improved conductance, improved batteries, systems, and related methods
Eric H. Miller, Philpot, KY (US); Nicholas R. Shelton, Owensboro, KY (US); and William L. Walter, Owensboro, KY (US)
Assigned to Daramic, LLC, Charlotte, NC (US)
Filed by Daramic, LLC, Charlotte, NC (US)
Filed on Mar. 18, 2022, as Appl. No. 17/697,987.
Application 17/697,987 is a division of application No. 16/328,043, granted, now 11,316,231, previously published as PCT/US2017/049820, filed on Sep. 1, 2017.
Claims priority of provisional application 62/385,576, filed on Sep. 9, 2016.
Claims priority of provisional application 62/383,076, filed on Sep. 2, 2016.
Prior Publication US 2022/0278420 A1, Sep. 1, 2022
Int. Cl. H01M 10/06 (2006.01); H01M 10/12 (2006.01); H01M 50/446 (2021.01); H01M 50/489 (2021.01); H01M 50/491 (2021.01); H01M 50/417 (2021.01); H01M 50/449 (2021.01)
CPC H01M 10/12 (2013.01) [H01M 10/06 (2013.01); H01M 50/417 (2021.01); H01M 50/446 (2021.01); H01M 50/489 (2021.01); H01M 50/491 (2021.01); H01M 50/449 (2021.01); H01M 2220/20 (2013.01); Y02E 60/10 (2013.01); Y02T 10/70 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A lead acid battery comprising:
a polyolefin microporous membrane comprising polyethylene, preferably, ultrahigh molecular weight polyethylene, a particle-like filler, and a processing plasticizer; wherein the particle-like filler is present in an amount of 40% or more by weight; and wherein the polyethylene comprises polymer in a shish-kebab formation comprising a plurality of extended chain crystals (the shish formations) and a plurality of folded chain crystals (the kebab formations) and wherein the average repetition or periodicity of the kebab formations is from 1 nm to 150 nm, preferably less than 120 nm; and
having a shelf life estimated cold cranking amps loss as compared to an initial value of less than approximately 9%.