Activation fuel cell system, vehicle and activation method

The invention relates to the technical field of fuel cells, in particular to an activation fuel cell system, a vehicle and an activation method.The system comprises an electric pile, a nitrogen source, an air subsystem and a hydrogen subsystem, and the electric pile comprises an air side inlet and a hydrogen side inlet; the air subsystem comprises a humidifier and an inlet three-way valve; the hydrogen subsystem comprises a hydrogen supply device; the inlet three-way valve is communicated with the outlet end of the hydrogen supply device through a second electromagnetic valve; the inlet three-way valve is connected between the air side inlet and the humidifier; the nitrogen source, the hydrogen supply device and the hydrogen side inlet are communicated in sequence; according to the invention, the fuel cell engine can be purged and activated regularly, and the stack performance is recovered; nitrogen of the nitrogen source can be supplemented regularly, the time for supplementing the nitrogen once is only a fe