Galvanic element
AssigneeVARTA Microbattery GmbH, a corporation of Germany, Am Leineufer 51,30419 Hannover, Germany
InventorsEugen Braunger, Konrad Holl, Bernd Kreidler, Dejan Ilic
Life of this patent
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Abstract
A galvanic element with an alkaline electrolyte and a zinc negative electrode, in a housing in the form of a button cell, where at least the outer surface of the cell's cap is coated with a Cu—Sn-alloy containing no nickel or with a Cu—Sn—Zn-alloy containing no nickel. The alloy contains about 20% to about 90% Cu, preferably about 50% to about 60% Cu, with the remainder being Sn, or about 50% to about 60% Cu and about 25% to about 35% Sn, with the remainder being Zn.
Claims14
A galvanic element comprising:
- a cup,
- a cap sealed to the cup,
- said cup and cap housing an alkaline electrolyte and a zinc negative electrode, and
- a Cu—Sn-alloy containing substantially no nickel coated on at least an outer surface of the cap.
A galvanic element comprising:
- a cup,
- a cap sealed to the cup,
- said cup and cap housing an alkaline electrolyte and a zinc negative electrode, and
- a Cu—Sn—Zn-alloy containing substantially no nickel coated on at least an outer surface of the cap.
Dependencies are inferred from the claim text.