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Battery paste compositions and electrochemical cells for use therewith

United States Patent

5,871,862
February 16, 1999
View the Complete Patent at the US Patent & Trademark Office
An improved battery paste composition and a lead-acid electrochemical cell which incorporates the composition. The cell includes a positive current collector and a negative current collector which are each coated with a paste containing one or more lead-containing compositions and a paste vehicle to form a positive plate and a negative plate. An absorbent electrolyte-containing separator member may also be positioned between the positive and negative plates. The paste on the positive current collector, the negative current collector, or both further includes a special additive consisting of polyvinylsulfonic acid or salts thereof which provides many benefits including improved battery cycle life, increased charge capacity, and enhanced overall stability. The additive also makes the pastes smoother and more adhesive, thereby improving the paste application process. The paste compositions of interest may be used in conventional flat-plate cells or in spirally wound batteries with equal effectiveness.
Olson; John B. (Boulder, CO)
Optima Batteries, Inc. (Aurora, CO)
08/ 853,377
May 8, 1997
CONTRACTUAL ORIGIN OF THE INVENTION The Government of the United States of America has rights in this invention pursuant to sub-contract ZCB-4-13032-10 (sub-sub-contract TCB02586) awarded by the U.S. Department of Energy.