STACK CONNECTION BLOCK ADAPTABLE TO FUEL CELL SYSTEM OUTPUTS, AND ASSOCIATED FUEL CELL SYSTEM, AND CORRESPONDING METHOD

A stack connection block (5) for a fuel cell stack (3) has a stack connection (31, 37) for a fuel, such as hydrogen, a stack connection (33, 39) for a reaction partner, such as air, and a stack connection (35, 41) for a cooling medium. All three stack connections are designed for connection to the fuel cell stack (3). The stack connection block (5) is configured for a humidifier (13) which is integrated in the interior thereof, and which is adaptable in its performance depending on a resistance and/or performance of the fuel cell stack (3) being operated. At least one feed duct (45, 47) and at least one drain duct (49, 51) are guided in the stack connection block (5) to the humidifier (13). The feed duct (47) opens out into the stack connection (33) for the reaction partner (73). The invention also relates to a corresponding fuel cell system (1) having a stack connection block (5) and to a suitable method for multiple use of a stack connection block (5).