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 channel of the plurality of channels including a predetermined number of unit cells, andcalculate impedances of a subset of the plurality of channels having voltages affecting diagnosis of the fuel cell stack; and
a controller configured to diagnose a state of the fuel cell stack based on the calculated impedances, wherein the SVM is configured to estimate a distribution of impedances of all the channels of the fuel cell stack based on a distribution of the calculated impedances of the subset of the plurality of channels.
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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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18 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 channel of the plurality of channels including a predetermined number of unit cells, and calculate impedances of a subset of the plurality of channels having voltages affecting diagnosis of the fuel cell stack; and a controller configured to diagnose a state of the fuel cell stack based on the calculated impedances, wherein the SVM is configured to estimate a distribution of impedances of all the channels of the fuel cell stack based on a distribution of the calculated impedances of the subset of the plurality of channels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. 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 channel of the plurality of channels including a predetermined number of unit cells; calculating impedances of a subset of the plurality of channels having voltages affecting diagnosis of the fuel cell stack; and at a controller, diagnosing the state of the fuel cell stack based on the calculated impedances, wherein calculating the impedances comprises; estimating a distribution of impedances of all the channels of the fuel cell stack based on a distribution of the calculated impedances of the subset of the plurality of channels. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification