Multi-Region Battery Separators
AssigneeHollingsworth & Vose Company
InventorsAkshay Ashirgade, Zhiping Jiang
Life of this patent
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Abstract
Disclosed is a battery separator, comprising two fiber regions comprising glass fibers, and a middle fiber region disposed between them comprising larger average diameter fibers and specified amounts of silica, or fine fibers, or both; and processes for making the separator. Also disclosed is a battery separator, comprising a fiber region and either one or two silica-containing region(s) adjacent thereto, each of the regions containing a specified amount of silica; and processes for making the separator. Such separators are useful, e.g., in lead-acid batteries.
Claims20
1-19. (canceled)
A battery separator, comprising:
- a fiber region;
- and
- either
- (a) a silica-containing region adjacent to the fiber region, or
- (b) a first silica-containing region and a second silica-containing region, wherein the fiber region is disposed between the first silica-containing region and the second silica-containing region;
- wherein the fiber region and each silica-containing region contains fibers having an average diameter from about 2 to about 25 μm;
- wherein the fiber region contains less than 2% by weight silica;
- and
- wherein each silica-containing region independently contains greater than or equal to 2% by weight silica.
(canceled)
Dependencies are inferred from the claim text.