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AssigneeDaramic, LLC
InventorsMohammed Naiha, Jörg Deiters, Ahila Krishnamoorthy, Eric H. Miller, J. Kevin Whear, Robert W. Saffel, Naoto Miyake, Kanak Kuwelkar
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A battery separator has performance enhancing additives or coatings, fillers with increased friability, increased ionic diffusion, decreased tortuosity, increased wettability, reduced oil content, reduced thickness, decreased electrical resistance, and/or increased porosity. The separator in a battery reduces the water loss, lowers acid stratification, lowers the voltage drop, and/or increases the CCA. The separators include or exhibit performance enhancing additives or coatings, increased porosity, increased void volume, amorphous silica, higher oil absorption silica, higher silanol group silica, reduced electrical resistance, a shish-kebab structure or morphology, a polyolefin microporous membrane containing particle-like filler in an amount of 40% or more by weight of the membrane and ultrahigh molecular weight polyethylene having shish-kebab formations and the average repetition periodicity of the kebab formation from 1 nm to 150 nm, decreased sheet thickness, decreased tortuosity, separators especially well-suited for enhanced flooded batteries.
A polyolefinic battery separator having an electrical resistance no greater than 160 mΩ·cm2, wherein the separator comprises silica having a molecular ratio of OH to Si groups within a range of from 21:100 to 35:100 and a bubble flow rate of from 0.015 to 0.02 l/min, and a surfactant having a hydrophilic-lipophilic balance value less than three and the surfactant is present in or on the separator at a density between 0.5-10 g/m2, and wherein the surfactant is one or more selected from the following items:
A battery comprising a polyolefinic battery separator having an electrical resistance no greater than 160 mΩ·cm2, wherein the separator comprises silica having a molecular ratio of OH to Si groups within a range of from 21:100 to 35:100 and a bubble flow rate of from 0.015 to 0.02 l/min, and a surfactant having a hydrophilic-lipophilic balance value less than three and the surfactant is present in or on the separator at a density between 0.5-10 g/m2, wherein the surfactant is one or more selected from the following items:
Dependencies are inferred from the claim text.