Abstract: The invention relates to a housing (10) in which at least one fuel-cell stack (20) is accommodated. The fuel-cell stack (20) comprises a number of electrolyte membranes (54) and bipolar plates (34) arranged one above the other. The housing (10) comprises an inner side (12), which is directed towards the at least one fuel-cell stack (20) and on which is formed a ribbing arrangement (14), which increases the surface area of the housing (10), or individual bipolar plates (34) within the at least one fuel-cell stack (20) have a projecting portion (36). The invention also relates to the use of the housing in a fuel cell having at least one fuel-cell stack (20) for driving an electric vehicle.

Abstract: A method for determining an air ratio in a burner for a fuel cell heater having an ionization sensor in the range of the flame and which is fed with two different gases for combustion, one of said gases being obtained from a gas treatment, wherein a measurement signal of the ionization sensor is converted into an actual value for the air ratio depending on one or more variable of states of the gas treatment.

Abstract: A method for determining an air ratio in a burner for a fuel cell heater having an ionization sensor in the range of the flame and which is fed with two different gases for combustion, one of said gases being obtained from a gas treatment, wherein a measurement signal of the ionization sensor is converted into an actual value for the air ratio depending on one or more variable of states of the gas treatment.

Abstract: A fuel cell heating device (10) comprising a gas treatment unit (16) having an inlet line (14) for gas and an outlet line (36) for hydrogenous reformate, wherein the inlet line and the outlet line are linked together by a circulation line in order to re-feed the reformate back to the gas treatment unit, wherein the gas treatment unit has a reformer and a downstream gas purification system comprising an inlet line for air and a water trap.