Method of diagnosing and preventing disconnection of fuel cell humidifier

A method performed by an apparatus of a humidifier system comprising:

• receiving, by a controller circuit and from a sensor system, operating status information of a fuel cell stack;
• determining, by the controller circuit based on the operating status information, an accumulation rate of hydrogen peroxide produced by the fuel cell stack;
• determining, by the controller circuit, whether the accumulation rate of hydrogen peroxide is within one or more set ranges;
• controlling an operation of the fuel cell stack according to a fuel cell stop threshold and a fuel cell restart threshold, wherein the fuel cell stop threshold and the fuel cell restart threshold are controlled based on whether the accumulation rate of hydrogen peroxide is within the set range.

A method performed by an apparatus of a humidifier system, the method comprising:

• determining, by a controller circuit, an accumulation rate of hydrogen peroxide produced by a fuel cell stack;
• controlling, by the controller circuit and based on the accumulation rate of hydrogen peroxide being within a set range, operation of the fuel cell stack according to one or more operation parameters corresponding to the set range;
• determining, by the controller circuit, an accumulated amount of an air oversupply excess from the accumulation rate of hydrogen peroxide;
• and
• causing, by the controller circuit and based on the accumulated amount of the air oversupply excess exceeding a set value, a user interface to output a notification indicating a risk of humidifier disconnection.