| 摘要 |
While the operation of a fuel cell is stopped, a pressure decrease caused by a current sweep is suppressed from being misjudged as being the occurrence of a hydrogen leak or a cross leak, and the judgment accuracy of the hydrogen leak, etc. is improved. In order to realize this feature, during an intermittent operation, in which, when a load on the fuel cell system is low, electrical power is supplied from a power storage unit in the fuel cell system to a power-consuming apparatus and power generation of a fuel cell is temporarily stopped, in the situation where a current sweep for suppressing a degradation of the fuel cell is performed, a hydrogen pressure in an anode of the fuel cell is corrected based on hydrogen consumed by the current sweep, and a hydrogen leak judgment based on a pressure decrease or a cross leak judgment based on a pressure decrease is performed on the basis of the corrected hydrogen pressure. For example, a pressure decrease speed of the hydrogen pressure in the anode which decreases due to power generation in the current sweep is integrated to obtain the amount of hydrogen pressure decrease caused by the power generation; and the amount of hydrogen pressure decrease can be reflected. |
