Diffusion vent for a rechargeable metal-air cell

Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation

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Details

429 72, 429 89, 429 86, H01M 212, H01M 1206

Patent

active

054864291

ABSTRACT:
The present invention provides a system for venting gas from within a case housing a metal-air cell having a cathode and an anode with a separator positioned therebetween. The cell has at least one gas vent on the anode side of the separator that extends from the interior surface of the case to the exterior surface. Each gas vent has a gas vent cap thereon on the interior surface of the case. A gas permeable, hydrophobic membrane is positioned between each gas vent and gas vent cap. The gas vent, with the gas vent cap positioned thereon, prevents the anode from blocking the venting of gas through the membrane.

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Abstract of Soviet Document SU 752 566 in the name of Lenningrad Lensovet Tech, entitled "Air Magnesium Cell", Jul. 1980.

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