Hydrogen sensor for use in battery overcharge/overdischarge detector and hydrogen leakage detector
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United States of America Patent
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Aug 8, 2006
Grant Date -
Sep 11, 2003
app pub date -
Feb 10, 2003
filing date -
May 13, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hydrogen sensor which may be employed in an overcharge/overdischarge detector for a battery and a hydrogen leakage detector for a fuel cell is provided. The hydrogen sensor includes a sensor element and a diffused resistor member. The gas to be measured passes through the diffused resistor member and reaches the sensor element. The sensor element outputs a signal indicative of the concentration of hydrogen contained in the gas as a function of a decrease in concentration of oxygen contained in the gas arising from reaction of the hydrogen on the oxygen. The diffused resistor member is so designed that speeds of diffusion of the hydrogen and the oxygen when passing through the diffused resistor member are different from each other for increasing the sensitivity of measurement of the concentration of hydrogen.
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