Liquid-fuel fuel cell, operation monitoring method for monitoring operation thereof, and operation monitoring device
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United States of America Patent
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Issued Date -
Oct 20, 2005
app pub date -
Dec 16, 2004
filing date -
Jun 17, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A liquid-fuel feed fuel cell disclosed with a unit cell that has a structure in which a negative electrode and a positive electrode are opposed with a polymer electrolyte having a proton conductivity interposed between them. A liquid fuel is supplied to the negative electrode and air is supplied to the positive electrode. The liquid-fuel feed fuel cell has a cell stack where unit cells are stacked. Additionally, an operation monitoring method for monitoring the operation and an operation monitoring device are disclosed. To prevent degradation, the liquid-fuel feed fuel cell has at least one of the following functions: increasing the supply of air or liquid fuel, issuing an alarm, decreasing the output current, and stopping the operation of the fuel cell when it is detected that the potential between the negative and positive electrodes monitored for at least one cell is below a predetermined negative potential.
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