Abstract: A fuel cell system with fuel cells displaying cooling channels assembled to form a fuel cell stack, with a coolant cycle in which coolant is circulated by a pump in a main cycle which includes the cooling channels and a cooler and with a heat storage unit and a heating device is characterized by the fact that the heat storage unit is arranged in a branch on the coolant cycle parallel to the cooler, that a heat exchanger that can be heated by the heating device is arranged in a second branch parallel to the heat storage unit, that a second pump in the first branch is arranged in front of the heat storage unit, that a two-way switching valve is provided which displays a first connection arranged in a first branch in front of the second pump, a second connection arranged in the first branch in front of the second pump and a third connection which is arranged in the second branch in front of the heat exchanger, and that a T connection is provided between the first branch, the second branch and the main cycle.

Abstract: The invention pertains to a process for preventing the freezing of water in a structural component containing at least one moving part in the anode cycle of a fuel cell system, characterized by the fact that at the time of a switching-off process the structural component is scavenged by a dry scavenging gas in order to remove a quantity of water present there.

Abstract: The invention pertains to a process for preventing the freezing of water in a structural component containing at least one moving part in the anode cycle of a fuel cell system, characterized by the fact that at the time of a switching-off process the structural component is scavenged by a dry scavenging gas in order to remove a quantity of water present there.

Abstract: A fuel cell system with fuel cells displaying cooling channels (26) assembled to form a fuel cell stack (10), with a coolant cycle (16) in which coolant is circulated by a pump (72) in a main cycle (70) which includes the cooling channels and a cooler (74) and with a heat storage unit (100) and a heating device (104) is characterized by the fact that the heat storage unit (100) is arranged in a branch (102) on the coolant cycle (16) parallel to the cooler (74), that a heat exchanger (106) that can be heated by the heating device (104) is arranged in a second branch (108) parallel to the heat storage unit (100), that a second pump (110) in the first branch (102) is arranged in front of the heat storage unit (100), that a two-way switching valve (112) is provided which displays a first connection (114) arranged in a first branch (102) in front of the second pump (110), a second connection (116) arranged in the first branch (102) in front of the second pump (110) and a third connection (118) which is arranged in