Eveready Battery Company, Inc.

Thomas J O'Hara, Iii

Manuel R Malay

Alan D Ayers

Earl J Chaney, Jr

Jingdong Guo

Xi-Xian Wu

Theodore P Dziak

An improved button air cell is provided that contains zero mercury, is free of indium on the sealing surface of the anode cup and has an active material comprising zinc alloyed with lead. Also provided is a method of forming a button electrochemical cell free of mercury and having no indium on the inner surface of the anode cup.

Zero mercury air cell

An electrochemical cell according to the present invention includes a can having an open end; electrochemical materials including two electrodes provided inside the can; a seal provided in the open end of the can for preventing leakage of the electrochemical materials from the can; and a moisture barrier provided in the open end of the can for preventing external moisture from reaching the interior of the cell. Preferably, the ambient air barrier includes an inner cover or outer cover having at least one aperture. The ambient air barrier may further include a moisture-impervious plug material disposed in contact with the inner cover or outer cover for releasably sealing the aperture in the inner cover or outer cover. Alternatively, the moisture barrier may include a layer of moisture-impervious material disposed on the outer surface of the seal in an area exposed to ambient air passing at least partially through the aperture in the inner cover and/or outer cover.

Electrochemical cell having a moisture barrier

Electrode strips, such as lithium electrode strips, having a tacky surface to which a plurality of fibers are adhered to such surface so as to reduce the tackiness of such surface, and a method for coating the tacky surface of such electrode strips with such fibers.

Method for fiber coating tacky active electrode strips

An electrochemical cell having a temperature-activated vent in series with a pressure-activated vent. The inner cover of the inner cell housing has an upstanding rim around a central pressure release vent. The outer cover that closes the outer cell container has an annular area pressed against this rim and sealed to the rim by a heat fusible solder to form a temperature-responsive vent mechanism in series with the pressure-responsive vent.

Secondary seal for vented electrochemical cells

A non-resealable vent closure for a galvanic cell, such as a nonaqueous cell, which comprises a seal member force-fitted with a bushing having an upper portion terminating with a thinner walled lower portion and wherein said seal member is force-fitted within the lower portion of the bushing and the bushing is seated within and seals the vent orifice in the housing of the cell.

Electrochemical cell having a safety vent closure

Liquid cathode electrochemical cells have means for biasing a consumable metal anode against a separator and resultingly against a cathode collector. The biasing means contacts the active anode metal throughout the discharge of the cell.

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Bay Village, OH, United States of America

Thomas J O'Hara, Iii