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Diffusion vent for a rechargeable metal-air cell

  • US 5,486,429 A
  • Filed: 04/24/1995
  • Issued: 01/23/1996
  • Est. Priority Date: 04/24/1995
  • Status: Expired due to Fees
First Claim
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1. A system for venting gas from within a case housing a metal-air cell having a cathode and an anode with a separator position therebetween, said case having an interior surface and an exterior surface, comprising:

  • at least one gas vent in said case on the anode side of said separator;

    said gas vent extending from said interior surface of said case to said exterior surface of said case;

    a gas vent cap covering each one of the said gas vents on said interior surface of said case; and

    a gas permeable, hydrophobic membrane positioned between each pair of said gas vents and said gas vent caps;

    said gas vent cap being configured to prevent said anode from blocking the venting of gas through said membrane.

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