Metal-air depolarized cell having restricted gas passageway

Details Metal-air depolarized cell having restricted gas passageway Metal-air depolarized cell having restricted gas passageway

1977-09-28

1978-10-03

Skapars, Anthony

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

429162, 296231, H01M 1206

Patent

active

041185447

ABSTRACT:
A gas-depolarizable galvanic cell is provided having restricted gas access to the cathode. The cell is generally a metal-air cell, and may particularly be a button cell suitable for use in electronic watches, hearing aids and the like. The restricted gas access to the cathode comes either by way of a very small aperture in the cell container, or in an additional barrier layer placed within the cell. The cross-sectional area of the gas passageway is less than the projected area of the gas passageway through the thickness of the container or additional barrier layer; and may be formed by piercing or punching but more particularly by exposing the container or the material of the additional barrier layer to a laser beam.

REFERENCES:
patent: 3746580 (1973-07-01), Aker et al.
patent: 3840404 (1974-10-01), Porter et al.
patent: 3855000 (1974-12-01), Jammet
patent: 3881959 (1975-05-01), Tsuchido et al.

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