Zinc anode for reduced environmental hazard LeClanche cell having improved performance
AssigneeRayovac Corporation
InventorsRonald J. Ekern, Terry G. Messing
Life of this patent
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Abstract
A low iron zinc anode for a LeClanche cell, and methods of making and using same, are provided for in the invention. The zinc anode contains at least 95% zinc and no more than about 12 ppm iron, and may be configured for use in round or flat LeClanche cells. The zinc anodes of the invention may be used in general purpose and heavy duty batteries containing an electrolyte comprising zinc chloride as a primary component. Cells made in accordance with the invention exhibit improved capacity and other performance characteristics in respect of conventional cells.
Claims103
A zinc anode configured for use in a round LeClanche cell, the anode consisting essentially of a zinc alloy containing at least 95% zinc and no more than about 12 ppm iron by weight, the anode forming a cylindrical can having a bottom and a sidewall extending upwardly therefrom, the can having an initially open top end.
A zinc anode configured for use in a round LeClanche cell, the anode consisting essentially of a zinc alloy containing up to about 12 ppm iron by weight, up to 2000 ppm cadmium by weight, up to 6000 ppm lead by weight, up to 100 ppm magnesium by weight, up to 600 ppm manganese by weight, up to 200 ppm copper by weight, up to 10 ppm nickel by weight, up to 5 ppm cobalt by weight, up to 1000 ppm thallium by weight, up to 5 ppm by weight of each of molybdenum, antimony, arsenic, up to 6000 ppm by weight of each of aluminum, indium, bismuth, and calcium, the balance being zinc, the zinc anode forming a cylindrical can having a bottom and a sidewall extending upwardly therefrom, the can having an initially open top end.
A zinc anode configured for use in a round LeClanche cell, the anode consisting essentially of a zinc alloy containing at least 95% zinc and no more than about 12 ppm iron by weight, the anode forming an inner can disposed within an outer can, the inner can having a bottom and a sidewall extending upwardly therefrom, the inner can having an initially open top end and being in electrical contact with the outer can.
A zinc anode configured for use in a round LeClanche cell, the anode consisting essentially of a zinc alloy containing at least 95% zinc and no more than about 12 ppm iron by weight, the anode forming a cylindrical sleeve having open top and bottom ends, the sleeve being disposed within an outer can and in electrical contact therewith.
A zinc anode configured for use in a round LeClanche cell, the anode consisting essentially of a zinc alloy containing at least 95% zinc and no more than about 12 ppm iron by weight, the anode forming a metal alloy plating disposed on the inner surface of an electrically conductive can-shaped container, the container having a bottom and a sidewall extending upwardly therefrom.
A zinc anode configured for use in a flat LeClanche cell, the anode consisting essentially of a zinc alloy containing at least 95% zinc and no more than about 12 ppm iron by weight, the anode forming a rectangular member having substantially flat opposing major top and bottom surfaces.
A zinc anode configured for use in a flat LeClanche cell, the anode consisting essentially of a zinc alloy containing up to about 12 ppm iron by weight, up to 2000 ppm cadmium by weight, up to 6000 ppm lead by weight, up to 100 ppm magnesium by weight, up to 600 ppm manganese by weight, up to 200 ppm copper by weight, up to 10 ppm nickel by weight, up to 5 ppm cobalt by weight, up to 1000 ppm thallium by weight, up to 5 ppm by weight of each of molybdenum, antimony, arsenic, up to 8000 ppm by weight of each of aluminum, indium, bismuth, and calcium, the balance being zinc, the zinc anode forming a rectangular member having substantially flat opposing major top and bottom surfaces.
A zinc anode configured for use in a round LeClanche cell, the anode consisting essentially of a zinc alloy containing up to about 8 ppm iron by weight, up to 30 ppm cadmium by weight, between 600 and 800 ppm lead by weight, between 6 and 15 ppm magnesium by weight, between 60 and 150 ppm manganese by weight, up to 5 ppm copper by weight, up to 0.5 ppm nickel by weight, up to 0.1 ppm cobalt by weight, up to 1 ppm by weight of each of molybdenum, antimony, arsenic, aluminum, indium, bismuth, and calcium, the balance being zinc, the zinc anode forming a cylindrical can having a bottom and a sidewall extending upwardly therefrom, the can having an initially open top end.
Dependencies are inferred from the claim text.