Apparatus and Method for Diagnosing State of Fuel Cell Stack
First Claim
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1. An apparatus comprising:
- a stack voltage monitor (SVM) configured tomeasure a voltage of each channel of a plurality of channels of a fuel cell stack, each of the channel of the plurality of channels including a predetermined number of unit cells, andcalculate impedance of each of the channel from the measured voltage; and
a controller configured to diagnose a state of the fuel cell stack based on the impedance of each of the channel.
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Abstract
An apparatus includes a stack voltage monitor that measures a voltage of each channel of a plurality of channels of a fuel cell stack. Each of the channel of the plurality of channels includes a predetermined number of unit cells. The stack voltage monitor calculates impedance of each of the channel from the measured voltage. The apparatus further includes a controller that diagnoses a state of the fuel cell stack based on the impedance of each of the channel.
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20 Claims
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1. An apparatus comprising:
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a stack voltage monitor (SVM) configured to measure a voltage of each channel of a plurality of channels of a fuel cell stack, each of the channel of the plurality of channels including a predetermined number of unit cells, and calculate impedance of each of the channel from the measured voltage; and a controller configured to diagnose a state of the fuel cell stack based on the impedance of each of the channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for diagnosing a state of a fuel cell stack, the method comprising:
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measuring a voltage for each channel of a plurality of channels of a fuel cell stack, each of the channel of the plurality of channels including a predetermined number of unit cells; calculating impedance of each of the channel from the measured voltage; and at a controller, diagnosing the state of the fuel cell stack based on the calculated impedances of each channel.
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12. The method according to claim ii, wherein calculating the impedances comprises:
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calculating an impedance of a minimum voltage channel from amongst the plurality of channels, calculating an impedance of a maximum voltage channel from amongst the plurality of channels, calculating an impedance of an average voltage channel from amongst the plurality of channels, calculating an impedance of a maximum voltage variation channel from amongst the plurality of channels, calculating an impedance of a minimum voltage variation channel from amongst the plurality of channels, and calculating a stack impedance. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification