Method of diagnosing leakage of stack coolant and device therefor

An apparatus comprising:

• a processor;
• and
• a memory storing at least one instruction that is configured, when executed by the processor communicating with the memory, to cause the apparatus to:
• diagnose, based on detecting a coolant level of coolant storage in a fuel cell system of a fuel cell system, whether airtightness of a cooling line in the fuel cell system is abnormal;
• diagnose, based on the airtightness of the cooling line being diagnosed as being abnormal and based on voltage and current measurements of a fuel cell stack in the fuel cell system, contamination of the fuel cell stack due to leakage of a coolant in the coolant storage;
• and
• adjust, based on the diagnosing of contamination of the fuel cell stack, at least one operation of the fuel cell system that causes a contamination mitigation operation on the fuel cell stack.

A vehicle comprising:

• a fuel cell system comprising a fuel cell stack;
• a processor;
• and
• a memory storing at least one instruction that is configured, when executed by the processor communicating with the memory, to cause the vehicle to:
• determine, based on detecting a coolant level of coolant storage in the fuel cell system and based on at least one measurement associated with a physical characteristic of the fuel cell stack, contamination of the fuel cell stack due to leakage of a coolant in the coolant storage;
• adjust, based on the determined contamination of the fuel cell stack, at least one operation of the fuel cell system that causes a contamination mitigation operation on the fuel cell stack;
• and
• control, based on the adjusted at least one operation of the fuel cell system, an operation of the vehicle, wherein the at least one measurement comprises at least one of a voltage measurement associated with the fuel cell stack or a current measurement associated with the fuel cell stack.