Abstract: A fuel cell system has at least one fuel cell unit for generating electrical energy, a unit for storing or dispensing electrical energy, an electrical consumer for consuming electrical energy, a diagnostic unit for ascertaining a functional capability of the at least one fuel cell unit during a diagnosis phase, and a control unit for determining an electrical power generated at least during the diagnosis phase by the at least one fuel cell unit.

Abstract: A fuel cell device has a fuel cell, a hydrogen storage, and a hydrogen burner supplied from said hydrogen storage.

Abstract: A fuel cell device has a fuel cell unit including at least two fuel cell elements which are coupled with one another in a way selected from the group consisting of a series coupling, a parallel coupling, and both, for conversion of chemical energy into an electrical energy, and an electronic control unit for controlling individual fuel cell elements of the fuel cell unit.

Abstract: A fuel cell assembly for furnishing a fuel has a fuel preparation unit for preparation of a fuel that contains hydrogen to a fuel energy converter for chemical conversion and energy conversion of the fuel, a fuel pressure reservoir for storing the fuel subjected to pressure, at least one separate pressure energy recycling unit for converting and recycling pressure energy of the fuel, wherein the at least one pressure energy recycling unit includes at least one mechanical drive device for generating mechanical energy, and at least one electrical generator for generating electrical energy, disposed on the at least one mechanical drive device and configured for recovery or coupling of an expansion work in the at least one energy recycling unit.

Abstract: An apparatus for converting energy can be operated with gaseous fuel, in particular a fuel cell assembly with a fuel cell, a fuel reservoir, and consumers, adjusters, sensors, and a monitoring unit. The monitoring unit ascertains consumption by the fuel cell and/or monitors components required for its operation.

Abstract: A vehicle with a device (6) for converting chemical energy into electrical and/or mechanical energy, in particular a fuel cell unit (6) and/or combustion device (6), such as a diesel or gas engine (6), whereby at least one oxygen-containing source mixture is proved. The efficiency of the energy conversion, in particular, for protection of the environment, is improved relative to the state of the art. This is achieved according to the present invention, in that a separator (7) for separating off at least one oxygen-enriched fluid (2) from a fluid residue (3) of the source mixture (1) is provided.

Abstract: The fuel cell system has a fuel cell unit and a catalytically active reactor unit (3) for at least partial chemical transformation of an operating medium stream (1), especially a reformer, gas purifier stage and/or a combustor, in which the catalytically active reactor unit (3) has a variable catalytically active reactor volume (4) acted on by the operating medium stream. To provide the fuel cell system with a higher efficiency and good dynamic behavior the catalytically active reactor unit is provided with at least one control device (5, 8, 11, 12, 13) for controlling and/or for changing the variable catalytically active reactor volume (4) acted on by the operating medium stream (1).

Abstract: Disclosed is a fuel cell system with a control unit (3) for controlling and/or regulating at least one fuel cell unit (1), whereby the fuel cell unit (1) includes at least one membrane monitored by the control unit (3), and an electrical load (4) is provided, in particular an electric drive motor and/or at least one load on the vehicle electrical system, whereby the moistening of the fuel cell membrane is improved. This is achieved according to the present invention by the fact that the control unit (3) includes at least one additional electrical load (5, 7) for an additional power output from the fuel cell unit (1) which is dependent at least on the moistening of the membrane.

Abstract: The fuel cell apparatus has a fuel cell (1), a pressurized fuel tank (2) for supplying fuel at a supply pressure and a pressure-reducing unit (4) for reducing the supply pressure to an operating pressure of the fuel cell. In order to improve the overall efficiency of the unit in comparison to the art the pressure-reducing unit (4) is constructed as a cooling apparatus for cooling at least one cooling element, preferably a condenser (5).

Abstract: A vehicle having a combustion engine, a fuel cell device having a fuel cell unit, a compressed air storage for supply of a compressed air, a supply conduit provided between the fuel cell unit of the fuel cell device and the compressed air storage, for supplying the fuel cell unit with compressed air, and a further supply conduit provided between the combustion engine and the compressed air storage for supply of the combustion engine with compressed air.

Abstract: A safety system for a gas-operated apparatus for generating energy, in particular in a vehicle, includes at least one sensor for measuring the gas concentration. The sensor is preferably disposed in the passenger compartment of the vehicle. In the event of a dangerously high gas concentration, a fan and/or power window control is triggered via a control unit in such a way that the fastest possible air exchange in the passenger compartment of the vehicle results.

Abstract: A fuel cell system has at least one fuel cell unit for generating electrical energy, a unit for storing or dispensing electrical energy, an electrical consumer for consuming electrical energy, a diagnostic unit for ascertaining a functional capability of the at least one fuel cell unit during a diagnosis phase, and a control unit for determining an electrical power generated at least during the diagnosis phase by the at least one fuel cell unit.

Abstract: A fuel cell apparatus has a diaphragm located between the anode and cathode sides of a fuel cell. At least one pressure compensation element (10, 20) is provided, which limits the differential pressure acting on the diaphragm (5).

Abstract: The invention describes an apparatus for converting energy that can be operated with gaseous fuel, in particular a fuel cell assembly with a fuel cell (2), a fuel reservoir, and consumers (6), adjusters, sensors, and a monitoring unit. The object of the invention is to monitor the operation of the apparatus from the standpoint of safety. A monitoring unit (3) is provided for ascertaining consumption by the fuel cell (2) and/or for monitoring components required for its operation.

Abstract: Disclosed is a fuel cell system with a control unit (3) for controlling and/or regulating at least one fuel cell unit (1), whereby the fuel cell unit (1) includes at least one membrane monitored by the control unit (3), and an electrical load (4) is provided, in particular an electric drive motor and/or at least one load on the vehicle electrical system, whereby the moistening of the fuel cell membrane is improved. This is achieved according to the present invention by the fact that the control unit (3) includes at least one additional electrical load (5, 7) for an additional power output from the fuel cell unit (1) which is dependent at least on the moistening of the membrane.

Abstract: A vehicle includes a combustion arrangement formed as a motor selected from the group consisting of a gasoline motor and a diesel motor, a waste gas device associated with same combustion arrangement for withdrawal of a waste gas stream, the waste gas device having at least one precipitating unit for precipitation of water from the waste gas stream.

Abstract: The fuel reformer, especially for a fuel cell, produces a hydrogen-containing reformate from a fuel or hydrocarbon mixture supplied to it by partial oxidation (POX) and/or an autothermal reforming process. The reformer provides improved local reaction temperatures with increased conversion of hydrocarbons to hydrogen, decreased residual carbon monoxide formation and at the same time an increased yield of hydrogen. A gas supply member for distribution of reactants, such as air and/or oxygen, is arranged within the flow path of the fuel or hydrocarbon mixture in the reformer. The gas supply member has a plurality of gas supply outlets distributed in a flow direction along the fuel flow path for supplying the reactants to a catalyst material, which are distributed and formed so that reaction regions are more uniformly distributed along the flow path.

Abstract: A vehicle having a combustion engine, a fuel cell device having a fuel cell unit, a compressed air storage for supply of a compressed air, a supply conduit provided between the fuel cell unit of the fuel cell device and the compressed air storage, for supplying the fuel cell unit with compressed air, and a further supply conduit provided between the combustion engine and the compressed air storage for supply of the combustion engine with compressed air.

Abstract: An apparatus for controlling a fuel cell device for energy supply in a finished end product has a control unit for an operation of the fuel cell device, the control unit being formed so as to control control operational points in predetermined phases during the operation and to obtain an adjustable value of at least one device variable of the fuel cell device and to evaluate it with respect to at least one previously determined value of the device variable of the fuel cell device.

Abstract: A fuel cell device has a fuel cell, a hydrogen storage, and a hydrogen burner supplied from said hydrogen storage.