Humidifying device for a fuel cell, method for humidifying a fuel cell membrane and fuel cell
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United States of America Patent
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Feb 24, 2004
Grant Date -
N/A
app pub date -
Nov 27, 2001
filing date -
Apr 19, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The humidifying device for a fuel cell has a membrane, one side of which is exposed to cathode exhaust gas of a fuel cell for extracting water vapor from the exhaust gas. A connecting element connects the other side of the membrane to an anode or cathode gas supply to the fuel cell. In operation, water vapor permeates through the membrane and passes on through the connecting elements to humidify the gas being supplied to the fuel cell. A vacuum pump may additionally be provided to enhance the extraction of water vapor from the exhaust gas. A no metering unit allows accurate metering of the humidity of the cathode or anode gas supply.
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