Fuel cell stack, fuel cell device and fuel cell vehicle

A fuel cell stack, comprising:

• a stack module box;
• at least one fuel cell that is accommodated in the stack module box and includes a plurality of media channels;
• a plurality of media guides that are arranged on an outside of the stack module box and are in flow connection with the plurality of media channels of the at least one fuel cell;
• and
• a tensioning system which is guided around the stack module box and a tensioning device of which is guided around the plurality of media guides to apply a tensioning force to the plurality of media guides,
• wherein the plurality of media guides are formed from a resilient material and are designed with a spring function such that the plurality of media guides deform and change shape in response to an increase or a decrease in the tensioning force applied to the plurality of media guides by the tensioning device arising from temperature changes during operation of the fuel cell stack.