The invention relates to a method for operating and / or fueling a compressed
gas supply system (34) having at least two compressed gas tanks (15, 16, 17, 18, 19) which are attached to an
anode path (2) of a fuel
cell system (1). In order to increase the
thermal safety during the operation and / or during the fueling of the compressed
gas supply system (34), valve devices (21, 22, 23, 24, 25) associated with the compressed gas tanks (15, 16, 17, 18, 19) are individually controlled by a control device, for each of the compressed gas tanks (15, 16, 17, 18, 19), the valve devices (21, 22, 23, 24, 25) are individually controlled by a
control unit. The valve devices (21, 22, 23, 24, 25) comprise a filling path with an actively switchable filling valve and an unloading path with an actively switchable unloading valve, the control device is connected with a sensor device in the sensor aspect, and the sensor device comprises at least one sensor which detects the current temperature in the corresponding valve device (21, 22, 23, 24, 25).