| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell system, adapted to diagnose the fuel battery state of opposite air and hydrogen flows inside the cell, which, when in a high temperature high load state, enables the wet state of the fuel battery to be diagnosed before its output drops. <P>SOLUTION: A fuel battery is constructed so that, when in a high temperature high load state, the wet state of the fuel battery is diagnosed on the basis of impedance on a hydrogen inlet 14a side of a hydrogen passage 14 of a cell 10. This makes it possible for the wet state of the fuel battery to be diagnosed before its output drops. As a result, a reduction in the output of the fuel battery can be avoided. On the other hand, when the fuel battery is in a low temperature or a low load state, the wet state of the fuel battery is diagnosed on the basis of impedance on an air inlet 15a side of an air passage 15 of the cell 10. <P>COPYRIGHT: (C)2013,JPO&INPIT |
