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。

The electromotive force of each of power generating cells of a fuel cell unit is compared with a first threshold voltage E1 for the electromotive force of the power generating cells immediately after fuel injection or a second threshold voltage E2 for the electromotive force when the fuel is running out. Using the results of comparison, a decision is made as to whether or not the electromotive forces of all the power generating cells exceed the first threshold voltage E1 within a give time tau1 or whether or not the electromotive force of some of the power generating cells falls below the second threshold voltage E2. An annunciator indicates the results of decision.