Gates Energy Products, Inc.

Robert F Nelson

Toshio Uba

David M Wisdom

A binary lead-tin alloy substrate for support of the electrochemically active material in lead-acid cells is disclosed having a tin concentration from about 0.3 to about 0.9 weight percent, the balance being lead. The tin impedes the formation of a passivation layer at the interface between the grid material and the active material improving cell recovery from deep discharge and improving cold cranking amperes performance.

Binary lead-tin alloy substrate for lead-acid electrochemical cells

A normally sealed starved electrolyte recombinant lead-acid cell of high discharge rate capability whose plates have a thickness from about 0.007 to about 0.027 inches, and whose grids are formed of high hydrogen overvoltage lead with a thickness of from about 0.005 inches to no more than 0.019 inches, with an inter-plate spacing of typically from about 0.005 to about 0.020 inches.

High rate sealed lead-acid battery with ultrathin plates

A sealed gas recombining lead-acid cell with absorbed electrolyte is produced by assembling unformed plates and high porosity glass mat separator whose surface area is from 0.2-1.7 m.sup.2 /g, adding a limited quantity of acid into the cell, and then either prior to or after sealing of the cell electrochemically forming the plates of the cell in situ. High rate performance of the cell is significantly improved over cells using conventional high surface area glass separators.

Method for producing a sealed lead-acid cell

A sealed gas recombining lead-acid cell with absorbed electrolyte is produced by assembling unformed plates and high porosity glass mat separator whose surface area is from 0.2-1.7 m.sup.2 /g, adding a limited quantity of acid into the cell, and then either prior to or after sealing of the cell electrochemically forming the plates of the cell in situ. High rate performance of the cell is significantly improved over the cells using conventional high surface area glass separators.

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Aurora, CO, United States of America

Robert F Nelson