ONLINE ACTIVATION METHOD AND ACTIVATION DEVICE FOR FUEL CELL SYSTEM

The present invention provides an online activation method and an activation device for a fuel cell system. The method comprises: acquiring a power-on time difference between the last power-off time and the current power-on time of a fuel cell system; if the power-on time difference is greater than a power-on time threshold, acquiring the ambient atmosphere humidity of the fuel cell system within the power-on time difference; comparing the ambient atmosphere humidity with a humidity threshold to obtain a first comparison result; acquiring a first time when the ambient atmosphere humidity is greater than the humidity threshold; comparing the first time with the power-on time difference to obtain a second comparison result; and determining, according to the first comparison result and the second comparison result, whether to activate the fuel cell system. According to the method provided in embodiments of the present invention, the fuel cell system is examined before a vehicle is started, it is determined whether the fuel cell system needs to be activated, and the activation step is pre-set, so that the service life of a fuel cell system stack is prolonged, the life attenuation of the stack is slowed down, and the driving experience of the driver is improved.