Robert Boschgmbh

Jochen Braun

Norbert Alaze

Helerson Kemmer

Sergei Hahn

Edgar Schmitt

Ernst-Dieter Schaefer

Ursula Eckstein

Christoph Zimmer

Volker Imhof

Andreas Wagner

Peter Zimmermann

Sebastian Gerwinn

Manfred Dreyer

Marcus Egle

Christian Debusmann

Sriganesh Sriram

Bruno Hans Dieners

A fuel cell system comprises a first fuel cell stack pair with a first fuel cell stack and a second fuel cell stack, a first compressor arrangement, and a first turbine arrangement, wherein the first compressor arrangement can be coupled to cathode inlets of the fuel cell stack of the first fuel cell stack pair, wherein the first turbine arrangement can be coupled to cathode outlets of the fuel cell stack of the first fuel cell stack pair, wherein the first turbine arrangement comprises a shaft, a first turbine which is connected to the shaft, a second turbine which is connected to the shaft, and a generator which is connected to the shaft, wherein the first compressor arrangement comprises at least one electrically operable compressor, and wherein the generator can be coupled to the at least one electrically operable compressor.

Fuel cell system having energy recuperation

The invention relates to a fuel cell system (), having: at least one fuel cell () and a cathode path () for providing an oxygen-containing reactant in the form of supply air (L) to the at least one fuel cell (), wherein the cathode path () has a supply air line () for providing the supply air (L) to the at least one fuel cell () and an exhaust air line () for discharging exhaust air (L) from the at least one fuel cell (), and at least one heat exchanger () is provided between the supply air line () and the exhaust air line () of the cathode path () in order to transfer thermal energy from the supply air (L) to the exhaust air (L). For this purpose, the heat exchanger () is designed to transfer the heat to an exhaust air (L) flow (M) flowing through the heat exchanger () by means of the evaporation and condensation of product water (H2O) and by means of multiple supply air (L) flows (M, M) flowing through the heat exchanger ().

Thermal transfer in the cathode path of a fuel cell system by means of the evaporation/condensation of product water

A device and method are disclosed for operating a fuel cell system having a fuel cell stack. Data are provided that map input variables of the fuel cell system and a position of a cell of the fuel cell stack on a voltage of the cell. A model is trained to map the input variables of the fuel cell system and the position of a cell of the fuel cell stack on a probability distribution for a prediction of a voltage of the cell. Instantaneous input variables of the fuel cell system are determined. A probability for the voltage of the cell or for a total voltage of the fuel cell stack is determined for a cell of the fuel cell stack based on the input variables using the model based on the probability distribution. A state of the fuel cell system is determined based on the probability.

Device and computer-implemented method for determining a state of a fuel cell system

The invention relates to a method for setting an operating strategy for a fuel cell system () of a power generation device (), in particular in the form of a vehicle, depending on an operating mode of the power generation device (), having the steps of: a determination unit () determining at least one current operating parameter (P) of the power generation device (), the determination unit () determining at least one cumulative and/or predictive operating parameter (P, P, P) of the power generation device (), and a setting device () setting the operating strategy for the fuel cell system () on the basis of the at least one current operating parameter (P) and the at least one cumulative and/or predictive operating parameter (P, P, P) of the power generation device (). The invention furthermore relates to a corresponding circuit arrangement (), to a computer program () and to a storage means with a computer program () stored thereon.

Method and circuit arrangement for setting an operating strategy for a fuel cell system

A method () for operating a gas bearing (), wherein the gas bearing is formed by a rotor () and a stator (), wherein when there is rotation against a stator () with a lift-off rotational speed nthe rotor () changes from mixed friction with the stator () into fluid friction with a medium () located between the stator () and the rotor (), wherein the rotational speed of the rotor () is kept at or above an idling rotational speed n, wherein&#x2014;in response to a first information item (), on the basis of which a change &#x394;F is to be expected in the acceleration forces F acting on the gas bearing (), a new value of a safety factor r:=n/nbetween the idling rotational speed nand the lift-off rotational speed nis determined (), and/or&#x2014;in response to a second information item (), on the basis of which a change &#x394;nis to be expected in the lift-off rotational speed n, a new value nis determined for the lift-off rotational speed n(), wherein the idling rotational speed nof the gas bearing () is adapted to the changed value of the safety factor r, and/or to the changed value nof the lift-off rotational speed n, (). The invention further relates to an associated computer program.

Method for energy-saving, low-wear operation of a gas bearing

The invention relates to a method and to a system for operating a fuel cell system () and at least one sub-system () of the fuel cell system (). According to the invention, these are arranged in a vehicle (), wherein the energy for a drive train () of the vehicle () can be drawn both from the fuel cell system () and from an alternative energy store (). The method comprises the following method steps: first, the number and duration of shut-down and/or stop phases of the vehicles () in a defined time interval in a first vehicle state () or in a second vehicle state () is determined based on vehicle state-specific learning functions (). Operating parameters of the fuel cell system () and of the at least one sub-system () of the fuel cell system () are then adjusted in dependence on the determined number and duration of shut-down and/or stop phases of the vehicle ().

Method and system for operating a fuel cell system

A piston pump for brake systems employs a pulsation-smoothing device that functions especially well in the region of the outlet valve. As a result, substantially less noise occurs, and the durability of the piston pump is substantially better. The piston pump is used essentially in traction-controlled motor vehicle brake systems.

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Heimsheim, Germany

Jochen Braun