Battery separators with cross ribs and related methods
AssigneeDaramic, LLC
InventorsEric H. Miller, J. Kevin Whear
Life of this patent
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Abstract
A separator for a lead acid battery is a porous membrane having a positive electrode face and a negative electrode face. A plurality of longitudinally extending ribs, a plurality of protrusions or a nonwoven material may be disposed upon the positive electrode face. A plurality of transversely extending ribs are disposed upon the negative electrode face. The transverse ribs disposed upon the negative electrode face are preferably juxtaposed to a negative electrode of the lead acid battery, when the separator is placed within that battery.
Claims21
A separator for a lead acid battery comprising:
- a porous membrane having a positive electrode face and a negative electrode face;
- a plurality of longitudinal ribs extending in a machine direction disposed upon said positive electrode face;
- and
- a plurality of transverse ribs extending in a cross-machine direction disposed upon said negative electrode face, said transverse ribs adapted to be juxtaposed to a negative electrode, being linear, or cross-hatched, or sinusoidal, or combinations thereof.
In a separator for a flooded automotive lead acid battery having a porous backweb with a first surface and a second surface, the improvement comprising:
- a plurality of transverse ribs being disposed upon the second surface of the backweb and extending in a cross-machine direction, wherein the transverse ribs are linear, or cross-hatched, or sinusoidal, or combinations thereof.
A lead acid battery comprising:
- a housing containing a positive electrode spaced apart from a negative electrode with a porous separator located between said positive electrode and said negative electrode and a liquid electrolyte in ionic communication between said positive electrode and said negative electrode, said separator having a plurality of longitudinal-ribs extending in a machine direction and disposed on a first surface of said separator and a plurality of transverse ribs extending in a cross-machine direction and disposed upon a second surface of said separator, said plurality of longitudinal ribs being juxtaposed to said positive electrode and said transverse-ribs being juxtaposed to said negative electrode, wherein the transverse-ribs are linear, or cross-hatched, or sinusoidal, or combinations thereof.
A method of making a separator for a flooded automotive lead acid battery, the separator having a porous backweb with a first surface and a second surface, the method comprising the step of:
- forming a plurality of transverse ribs on the second surface of the backweb extending in a cross-machine direction, the transverse ribs are linear, or cross-hatched, or combinations thereof.
Dependencies are inferred from the claim text.