Method and apparatus for operating a fuel cell system
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United States of America Patent
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Jul 25, 2000
Grant Date -
N/A
app pub date -
Jul 28, 1998
filing date -
Jul 28, 1998
priority date (Note) -
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Abstract
Method and apparatus for changing the state of operation of a fuel cell, such as starting the fuel cell up or shutting the fuel cell down, are disclosed. An idle load is applied to the fuel cell when the cell temperature is between about normal operating temperature and a transition temperature, and fuel and oxidizer are supplied to the fuel cell commensurate with the power delivered to the idle load. Below the transition temperature, purging/passivation procedures known in the art can be followed, and an open or dummy load applied to the fuel cell. At normal operating temperature or above a service load is applied to the fuel cell.
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