Diffusion vent for a rechargeable metal-air cell
First Claim
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.
2 Assignments
0 Petitions
Accused Products
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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Citations
65 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system for venting gas from within a polypropylene 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:
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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 polytetrafluouroethylene ("PTFE") membrane positioned between each pair of said gas vents and said gas vent cap; said PTFE membrane held in place by pinching said membrane between said gas vent and said gas vent cap. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A system for venting gas from within a polypropylene 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:
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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; said gas vent cap having at least one draining channel therein extending from said gas vent to said interior surface of said case; and a polytetrafluouroethylene ("PTFE") membrane positioned between each pair of said gas vents and said gas vent caps. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. 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:
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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; a gas permeable, hydrophobic membrane positioned between each pair of said gas vents and said gas vent caps; and a plurality of support pegs positioned on said interior surface on said anode side of said case; said support pegs and said gas vents with said gas caps positioned thereon defining a gas collection area on said interior surface of said case. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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53. 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:
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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; a gas permeable, hydrophobic membrane positioned between each pair of said gas vents and said gas vent caps; and a strip of thin material with a slit therein that deforms while under pressure positioned on the exterior surface of said case over each of said gas vents. - View Dependent Claims (54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65)
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Specification