Fuel cell system with wetness sensor
First Claim
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1. A fuel cell system comprising:
- at least one sensor including a pair of electrodes disposed on a substrate, the sensor being calibrated to produce an output signal having a magnitude that is (i) proportional to a relative humidity in a vicinity of the sensor during a first instance while exposed to water vapor and (ii), proportional to an amount of liquid water on the sensor during a second instance while exposed to liquid water.
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Abstract
A fuel cell system may have at least one sensor including a pair of electrodes disposed on a substrate. The sensor may be configured to produce an output signal having a magnitude that is proportional to a relative humidity in a vicinity of the sensor and, if liquid water is on the sensor, proportional to an amount of the liquid water on the sensor.
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Citations
17 Claims
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1. A fuel cell system comprising:
at least one sensor including a pair of electrodes disposed on a substrate, the sensor being calibrated to produce an output signal having a magnitude that is (i) proportional to a relative humidity in a vicinity of the sensor during a first instance while exposed to water vapor and (ii), proportional to an amount of liquid water on the sensor during a second instance while exposed to liquid water. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A fuel cell system comprising:
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a fuel cell stack; an air supply line in fluid communication with the fuel cell stack; a fuel supply line in fluid communication with the fuel cell stack; and a sensor disposed in one of the supply lines or the fuel cell stack, the sensor including a pair of electrodes disposed on a substrate and calibrated to produce an output signal having a magnitude that is (i) proportional to a relative humidity in a vicinity of the sensor during a first instance while exposed to water vapor and (ii) proportional to an amount of liquid water on the sensor during a second instance while exposed to liquid water. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A fuel cell system comprising:
at least one sensor having a pair of electrodes disposed on a substrate, the at least one sensor being calibrated to produce an output signal having a magnitude that is proportional to an amount of liquid water on the sensor based on an electrical potential difference between the electrodes. - View Dependent Claims (14, 15, 16, 17)
Specification