提供一种能将DMFC单元之状态确实地通知至外部的燃料电池系统。将具备有复数之发电单位电池2a-2c的燃料电池单元之各发电单位电池2a-2c的起电力,与相对于发电单位电池之燃料注入后瞬间的第1临界电压E1,又或是相对于燃料耗尽时之电力的第2临界电压E2作比较,并使用此比较结果,来判断所有发电单位电池2a-2c之起电力是否在特定时间71以内超过了前述第1临界电压E1,又或是发电单位电池2a-2c之任一个的起电力是否低于前述第2临界电压E2,而将此结果通知至通知器22。

To provide a fuel cell system capable of notifying precisely the state of a DMFC unit to the outside. The fuel cell system compares an electromotive voltage of each power generating cell 2a-2c of a fuel cell unit 2 having a plurality of power generating cells 2a-2c and a first threshold value E1 to the electromotive voltage after the fuel injection of the generating cell or a second threshold value E2 to the electromotive voltage at the time of fuel run-out, and using this comparison result, determines whether or not all the electromotive voltages of the generating cells 2a-2c exceeds a first threshold E1 in a prescribed time t1 or whether or not one of the electromotive voltages of the generating cells 2a-2c is below the second threshold E2, and notifies this result to an annunciator 22.