Back to results
US 2012/0270110 A1Published application
Composite battery separator
AssigneeAmtek Research International LLC
InventorsRobert R. Waterhouse, Chi Thuong-Le La, Richard W. Pekata
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeAmtek Research International LLC
InventorsRobert R. Waterhouse, Chi Thuong-Le La, Richard W. Pekata
Estimating the term…
A microporous silica-filled polyolefin separator (80) has a material composition that includes a fraction of cured rubber powder exhibiting low or no porosity. The cured rubber powder is a material derived from one or both of passenger and truck tires. The cured rubber powders exhibit the properties of increasing hydrogen evolution overpotential on the negative lead electrode and of decreasing the effect of antimony deposited on the negative electrode of the lead-acid battery. Incorporation of these cured rubber powders into the formulation of a microporous silica-filled polyethylene separator results in improved electrochemical properties in deep-cycle lead-acid batteries.
A microporous silica-filled polyethylene separator including cured rubber powder particles characterized by a low particle porosity within individual ones of the cured rubber powder particles, the cured rubber powder particles containing an active ingredient and, facilitated by the low particle porosity, exhibit through a controlled release mechanism a low rate of diffusion of the active ingredient out of the particles and thereby out of the microporous silica-filled polyethylene separator.
In a lead-acid storage battery characterized by a cycle life and including positive and negative electrodes arranged in a package filled with an acid electrolyte, the improvement comprising:
Dependencies are inferred from the claim text.