Electrical current measurement in a fuel cell
First Claim
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1. A fuel cell system generating electrical current comprising:
- a plurality of electrical current sensors connected to a fuel cell element to independently measure electrical current generated by said fuel cell element; and
a current monitoring device connected to each electrical current sensor;
said current monitoring device having comparison logic defining an acceptability status selected from the group consisting of trustworthy and untrustworthy for each of said plurality of electrical current sensor by independent comparison of a data value generated by said electrical current sensor to data values generated by the other of said electrical current sensors in said plurality of electrical current sensors.
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Abstract
A plurality of electrical current sensors for a set of fuel cell stacks in series independently measure electrical current in a fuel cell, and an acceptability status is determined for each electrical current sensor by independent comparison of each sensor measurement to the individual values of the other sensor measurements. A characteristic current measurement is derived from all electrical current sensors having an acceptability status which is trustworthy.
24 Citations
26 Claims
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1. A fuel cell system generating electrical current comprising:
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a plurality of electrical current sensors connected to a fuel cell element to independently measure electrical current generated by said fuel cell element; and
a current monitoring device connected to each electrical current sensor;
said current monitoring device having comparison logic defining an acceptability status selected from the group consisting of trustworthy and untrustworthy for each of said plurality of electrical current sensor by independent comparison of a data value generated by said electrical current sensor to data values generated by the other of said electrical current sensors in said plurality of electrical current sensors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for operating a fuel cell to generate electrical current comprising:
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measuring electrical current generated by a fuel cell element with a plurality of electrical current sensors;
defining an acceptability status selected from the group consisting of trustworthy and untrustworthy for each of said electrical current sensors by independent comparison of a data value of each electrical current sensor to data values of the other electrical current sensors in said plurality of electrical current sensors; and
operating said fuel cell using measurements from each of said plurality of electrical current sensors defined to have a trustworthy acceptability status. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification