Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Patent
1992-07-14
1994-07-12
Kalafut, Stephen
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
429 39, 429 48, 429 88, H01M 1206
Patent
active
053287770
ABSTRACT:
A cathode cover for a metal-air cell of the type having an air cathode positioned along an external surface of a cell case provides for improved control over exposure of the air cathode to air. The cathode cover allows a sufficient amount of air to the air cathode for an adequate production of power from the cell but limits the amount of air to which the air cathode is exposed so as to prevent premature failure of the cell from flooding, drying out, or contamination. In addition, the cathode cover avoids the problems of point diffusion of oxygen through the air cathode and localized electrolytic reactions. The cathode cover includes a mask member defining a plurality of openings therethrough and forming at least one substantially unobstructed air chamber between the mask member and the air cathode. The mask member includes at least about three of the openings per square inch of the air cathode and the openings provide between about 0.001 and about 0.01 square inches of total open area per square inch of air cathode. In addition, the air chamber has at least about 0.033 cubic inches of unobstructed volume per square inch of the air cathode.
REFERENCES:
patent: 3372060 (1968-03-01), Platner
patent: 3801375 (1974-04-01), Jaggard
patent: 3902922 (1975-09-01), Kalnoki-Kis
patent: 3963519 (1976-06-01), Louie
patent: 4687714 (1987-08-01), Oltman et al.
patent: 4822698 (1989-04-01), Jackovitz
patent: 5069986 (1991-12-01), Dworkin et al.
patent: 5093212 (1992-03-01), Lloyd et al.
Bentz R. Dennis
Pedicini Christopher S.
AER Energy Resources Inc.
Kalafut Stephen
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