Claims
- 1. An electrochemical metal-air cell, comprising:
- (a) an anode;
- (b) a cathode, including a cathode can, said cathode can having a bottom, said bottom having an inner surface, an outer surface, and at least two ports extending through said bottom, between said inner surface and said outer surface, each said port defining a minimum cross-sectional area thereacross, for passage of air therethrough to the interior of said cathode can; and
- (c) a tab sealed to said outer surface of said cathode can, covering said at least two ports, said tab having a permeability to air of about 50 cubic centimeters/100 inches square 24 hours to about 65 cubic centimeters/100 inches square 24 hours,
- said electrochemical cell having a limiting current, the ratio of the limiting current in milliamps to the sum of the areas of said at least two ports in millimeters squared being at least 100/1.
- 2. An electrochemical metal-air cell as in claim 1, said tab having a permeability to air of about 53 cubic centimeters/100 inches square 24 hours to about 60 cubic centimeters/100 inches square 24 hours.
- 3. An electrochemical metal-air cell as in claim 1, each of said at least two ports having an area corresponding to a diameter of no more than 0.008 inch.
- 4. An electrochemical metal-air cell as in claim 1, each of said at least two ports having an area corresponding to a diameter of no more than 0.005 inch.
- 5. An electrochemical metal-air cell, comprising:
- (a) an anode;
- (b) a cathode, including a cathode can, said cathode can having a bottom, an outside perimeter encompassing said bottom and defining an area of said bottom, said bottom having an inner surface, an outer surface, and at least three ports extending through said bottom, between said inner surface and said outer surface, each said port defining a minimum cross-sectional area thereacross, for passage of air therethrough to the interior of said cathode can, the average minimum cross-sectional area of said at least three ports corresponding to a diameter of no more than about 0.015 inch; and
- (c) a tab sealed to said outer surface of said cathode can, covering said at least three ports, said tab having a permeability to air of about 50 cubic centimeters/100 inches square 24 hours to about 65 cubic centimeters/100 inches square 24 hours.
- 6. An electrochemical metal-air cell as in claim 5, said tab having a permeability to air of about 53 cubic centimeters/100 inches square 24 hours to about 60 cubic centimeters/100 inches square 24 hours.
- 7. An electrochemical metal-air cell as in claim 5, each of said at least three ports having an area corresponding to a diameter of no more than 0.008 inch.
- 8. An electrochemical metal-air cell as in claim 5, each of said at least three ports having an area corresponding to a diameter of no more than 0.005 inch.
Parent Case Info
This is a continuation application of Ser. No. 08/530,754, filed Sep. 19, 1995, now U.S. Pat. No. 5,795,667, issued Aug. 18, 1998, which was a Continuation-in-Part of application Ser. No. 08/435,477, filed May 5, 1995, now U.S. Pat. No. 5,733,676 herein incorporated by reference in its entirety.
US Referenced Citations (12)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0741429 A2 |
Nov 1996 |
EPX |
Continuations (1)
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Number |
Date |
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Parent |
530754 |
Sep 1995 |
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Continuation in Parts (1)
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Number |
Date |
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435477 |
May 1995 |
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