Abstract: A pump has a shaft, an impeller arranged on the shaft, and a labyrinth seal which is arranged between stationary and moving parts of the pump. A plurality of blades are arranged on the rotor and a labyrinth seal extends at least between the shaft and a rear portion of the blades. A gap in the labyrinth seal is designed such that liquid water can be actively carried away, with the labyrinth seal for this purpose being designed at least in places with a channel in the form of a spiral and/or a staircase. The invention also relates to a fuel cell system having such a pump.

Abstract: A charging device for a fuel cell includes a turbine having a housing part with a receiving chamber in which a turbine wheel of the turbine is received so as to be rotatable relative to the housing part about an axis of rotation. The turbine wheel includes impeller vanes via which a medium, in particular a gaseous waste gas of the fuel cell, can flow against the turbine wheel in an inlet region, and which are curved forwards at least in the inlet region.

Abstract: An enclosed separator unit for incorporation into a gas supply device of a fuel cell system, to separate liquid from the gas supply device, includes a separator for separating the liquid. A housing encloses the separator unit which is arranged in a gas space 21 in the housing and/or is in thermal contact with the gas space. A line system is provided for discharging the liquid from the separator, and at least one fluid dynamically active functional component is arranged in the line system, in the gas space 21.

Abstract: A fuel cell system includes at least one fuel cell, water-conducting parts and components in the region of the supply and discharge of starting materials and products to and from the fuel cell, and at least one cooling circuit containing liquid cooling medium for cooling the fuel cell. The water-conducting parts and components are in thermal contact with the cooling medium, at least during individual operating phases of the fuel cell.

Abstract: A cooling device for a fuel cell system includes at least one cooling circuit, through which a fuel cell can be cooled. The fuel cell system also includes a component with at least an electric drive area and a gas delivery area. A gas can be delivered to the fuel cell through the gas delivery area and the component is actively cooled. The cooling of the component takes place together with the cooling of the fuel cell in a cooling circuit.

Abstract: The invention relates to a fuel cell system having at least one fuel cell (1) by means of which water is produced during operation, characterized by at least one atomizer apparatus (11), by means of which the water can be atomized into the environment. The invention also relates to a method for operation of a fuel cell (1).

Abstract: An apparatus for supplying a fuel cell in a fuel cell system with fuel gas is provided. The fuel cell system includes a mixing region, where unused fuel gas mixes with fresh fuel gas, a water precipitator, a device for the at least indirect heating of the supplied fresh fuel gas and at least one receptor for a sensor for sensing state variables and/or chemical magnitudes of the fuel gas flowing to the anode. The mixing region, water precipitator, device for the at least indirect heating and at least one sensor are combined in an integrated component part.

Abstract: A pump has a shaft, an impeller arranged on the shaft, and a labyrinth seal which is arranged between stationary and moving parts of the pump. A plurality of blades are arranged on the rotor and a labyrinth seal extends at least between the shaft and a rear portion of the blades. A gap in the labyrinth seal is designed such that liquid water can be actively carried away, with the labyrinth seal for this purpose being designed at least in places with a channel in the form of a spiral and/or a staircase. The invention also relates to a fuel cell system having such a pump.

Abstract: A flow unit such as may be provided as a recirculation device for an anode circuit of a fuel cell system has at least one moving element by which a two-phase flow with a liquid phase can be conveyed. At least one separator is arranged in or adjacent to the unit.

Abstract: An enclosed separator unit for incorporation into a gas supply device of a fuel cell system, to separate liquid from the gas supply device, includes a separator for separating the liquid. A housing encloses the separator unit which is arranged in a gas space 21 in the housing and/or is in thermal contact with the gas space. A line system is provided for discharging the liquid from the separator, and at least one fluid dynamically active functional component is arranged in the line system, in the gas space 21.

Abstract: A device which ensure functionality of a vehicle fuel cell system, even at temperatures of below freezing point, includes at least one heating element arranged in the area of the condensate trap of the fuel cell in such a way that any ice present is heated locally. As a result, one or more melted channels form, through which water may flow after only a very short thawing process.