Robert Boschgmbh

Helerson Kemmer

Holger Rapp

Anh-Tuan Hoang

Georg Mallebrein

Klaus Joos

Michael Frank

Haris Hamedovic

Alexander Schenck Zu Schweinsberg

Achim Hirchenhein

Joerg Koenig

Wolfgang Samenfink

Ruben Schlueter

Bernd Wichert

Jens Neuberg

Werner Haeming

Wolfgang Fischer

Joerg Heyse

Christian Grosse

Matthias Boee

Harald Bauer

Juergen Hackenberg

Daniel Zirkel

Stefan Schoenbauer

Ulrich Berner

Federico Buganza

Werner Belschner

Jens Intorp

Jan Hendrik Ohs

Jochen Braun

Kai Weeber

Mark Hellmann

Johannes Schild

Kai Jakobs

Thomas Steidten

Pierre-Yves Crepin

Corren Heimgaertner

Traugott Degler

Christian Reschke

Carlos Koster

Ralph Kober

Juergen Pfeiffer

Silke Seuling

Christian Grimminger

Hans-Peter Lehr

Emilie Hincker-Piocelle

Andreas Schmitt

Felix Guenther

Thomas Becker

Egbert Fuchs

Herbert Gruhn

Ingo Brauer

Michael Schmidt

Thomas Gann

Martin Schulte Moenting

Christian Szonn

Achim Deistler

Felix Landhaeusser

Alexander Hartmann

Ralf Brandenburger

Pere Antoni Pastor Nigorra

Sascha Hoefler

Maurizio Scanu

Matthias Rink

Philipp Kotman

The invention relates to a method for operating a multi-stage air compression system () comprising an electrically driven first compressor () and a second compressor () driven by a turbine (), wherein the compressors () are arranged in a supply air path () and the turbine () is arranged in an exhaust air path () of an air system for supplying air to a fuel cell stack (). According to the invention, when the air compression system () is started, the air compressed by means of the first compressor () is supplied to the fuel cell stack () via a bypass () to bypass the second compressor () and the second compressor () is connected to the surrounding environment on both the inlet and outlet sides via at least one valve () and/or a throttle valve (). The invention further relates to a multi-stage air compression system () as well as a fuel cell system having a multi-stage air compression system ().

Method for operating a multi-stage air compression system, multi-stage air compression system, and fuel cell system

A method for fueling a means of transportation () using a hydrogen fueling device () is proposed, having the steps of setting up a communication connection between the hydrogen fueling device and the means of transportation, coupling a hydrogen delivery device to a tank () of the means of transportation and fueling the means of transportation, capturing a first hydrogen pressure of a hydrogen stream delivered by the hydrogen delivery device in the fueling device during fueling, capturing a second hydrogen pressure of the received hydrogen stream in the means of transportation during fueling, determining a discrepancy between the first hydrogen pressure and the second hydrogen pressure, and changing a sensor characteristic curve in the means of transportation in order to correct the capture of the second hydrogen pressure, if the discrepancy exceeds a threshold value.

Method for fueling a means of transportation using a hydrogen fueling device

The invention relates to a method for operating a fuel cell system (), in particular a PEM fuel cell system, in which at least one fuel cell () is supplied with a hydrogen-containing anode gas via an anode gas path () and anode gas exiting the fuel cell () is returned via a recirculation path (), wherein, in order to reduce a nitrogen content in the anode gas, a flush valve () arranged in the recirculation path () is opened and the recirculation path () is flushed. According to the invention, the hydrogen content of the anode gas is determined using at least one sensor () and used as a control variable when controlling the flushing of the recirculation path (). The invention also relates to a control device () for carrying out the method according to the invention.

Method for operating a fuel cell system and control device for same

The invention relates to a pressurized gas tank receiving assembly () for a motor vehicle () for cooling pressurized gas tanks (), wherein the pressurized gas tank receiving assembly () comprises: a) a main body () with a plurality of supporting surfaces () in the form of channels for receiving the pressurized gas tank (), wherein the main body () is thermally conductive and has a mounting interface () for arrangement on a counter mounting interface () of a body () of the motor vehicle (), wherein the main body () has thermally conducting surfaces () for thermally communicating connection to the body (), b) pressurized gas tanks () for storing gas under high pressure, wherein the pressurized gas tanks () are thermally conductive and are interlockingly received on the supporting surfaces () of the main body (), which supporting surfaces are in the form of channels, for thermal communication with the main body ().

Pressurized gas tank receiving assembly for a motor vehicle

The invention relates to a method for operating a fuel cell system, in particular a PEM fuel cell system, in which an anode gas is supplied to an anode () of a fuel cell via a supply path (), and is fed back via a recirculation path () connected to the anode (), wherein hydrogen is used as the anode gas. According to the invention, during the start up of the fuel cell system, the anode gas is supplied to a drying device (), in particular an adsorber, via at least one normally open valve (), and water is extracted from the anode gas using the drying device (). The invention also relates to a fuel cell system, in particular a PEM fuel cell system, which is suitable for carrying out the method.

Method for operating a fuel cell system, and fuel cell system

The invention relates to a method for opening a valve assembly for a fuel tank, comprising a pilot valve (V) and at least one additional valve (V), in particular for use in a fuel cell-operated vehicle, having the steps of applying () an amplification voltage (S) in order to open the pilot valve (V) in an opening phase (P) of the pilot valve (V), deactivating () the amplification voltage (S) in order to terminate the opening phase (P) of the pilot valve (V), applying () a pull-in voltage (S) in a pull-in phase (P) of the pilot valve (V) in order to hold the pilot valve (V) open, and activating and deactivating () the pull-in voltage (S) in an alternating manner in order to hold the pilot valve (V) open and in order to open the at least one other valve (V) and hold same open in a readjustment phase (P) such that the hold-open energy required on average for holding the pilot valve (V) open and the opening energy and/or hold-open energy required on average for the at least one other valve (V) is provided.

Method for opening a valve assembly for a fuel tank

The invention relates to a method for filling a hydrogen tank () of a motor vehicle () comprising a fuel cell drive, wherein the method comprises the steps: (a) determining a first operating time at which the motor vehicle () is to be started up and an expected first operating location at which the motor vehicle () is to be started up, (b) ascertaining a predicted maximum ambient temperature (T) at the first operating location at the first operating time, and (c) filling the hydrogen tank with hydrogen () until a tank pressure (p) in the hydrogen tank () reaches a maximum permissible tank pressure (p) at a tank temperature (T), wherein the following applies for the tank temperature (T): tank temperature (T)=[maximum ambient temperature (T); maximum ambient temperature (T)+10 K]. The invention relates further to a motor vehicle () comprising a hydrogen tank (), a fuel cell drive and a control system () for controlling filling of the hydrogen tank (), wherein the control system () to carry out the method.

Method for filling a hydrogen tank of a motor vehicle comprising a fuel cell drive and motor vehicle

The invention relates to a fuel cell () for a fuel cell stack (), comprising a polymer membrane () which serves as an electrolyte and has respectively on both sides a catalyst layer () for forming an anode () on the one side and a cathode () on the other side, a gas diffusion layer () and a bipolar plate () being applied to each of the two analyst layers (). According to the invention, a short-circuit element () is applied, preferably printed, to at least one bipolar plate (), namely on the side facing away from the gas diffusion layer (). The invention also relates to a fuel cell stack () and to a method for operating a fuel cell stack ().

Fuel cell, fuel cell stack and method of operating a fuel cell stack

The invention relates to a method for detecting a leak in an energy converter system () containing a gas. A pressure regulator () is used to regulate a gas pressure in the energy converter system (), and the pressure regulator () has a gas metering valve (). The method has the following steps: a. measuring an inlet pressure () of the pressure regulator () and measuring an outlet pressure () of the pressure regulator (), b. measuring an output variable () of the energy converter system () and calculating a gas requirement in the energy converter system () on the basis of the output variable () of the energy converter system (), c. determining a first calculated flow () through the pressure regulator () on the basis of the measured inlet pressure () of the pressure regulator () and the measured outlet pressure () of the pressure regulator (), d. determining a second calculated flow () through the pressure regulator () on the basis of the gas requirement, e. comparing the first calculated flow () with the second calculated flow () by generating a first comparison value () from the first calculated flow () and the second calculated flow (), and f. determining a first threshold () and generating an error signal () if the value of the comparison value () is greater than the first threshold ().

Method for detecting a leak in an energy converter system

The invention relates to a turbo compressor (), in particular for a fuel cell system (). The turbo compressor () has a first compressor unit () and a second compressor unit (). The first compressor unit () comprises a first compressor () arranged on a first shaft () drivable by a drive unit (). The second compressor unit () comprises a second compressor () and an exhaust gas turbine (). The second compressor () and the exhaust gas turbine () are arranged on a second shaft ().

Turbo compressor, in particular for a fuel cell system

The invention relates to a distribution structure () for providing at least one reaction gas, in particular a gas mixture containing oxygen (O2), for a fuel cell () or an electrolyser, having a first structure element () and a second structure element (), wherein the first structure element () and the second structure element () are designed and arranged with respect to one another such that: a distribution area () for the reaction gas is formed between the first structure element () and the second structure element (); a plurality of feed channels () branch off from the distribution area () and are orientated substantially perpendicular to the distribution area (); and a plurality of discharge channels () are formed below the second structure element () and are orientated parallel to the distribution area ().

Distribution structure for providing at least one reaction gas

The invention relates to a method () for leakage monitoring of a fuel cell system (). According to the invention, it is provided that the leakage monitoring is carried out before or during shut-down of the fuel cell system () and during or after restarting of the fuel cell system ().

Leakage monitoring of a fuel cell system

The invention relates to a method for operating a tank system () comprising a number of at least two tanks (), which are connected in parallel and which contain a gaseous substance, and in which an interior pressure (PX) prevails, for supplying a consumer unit (), which requires a full load volume of the gaseous substance, wherein each tank () has a safety valve (), which shuts down the tank if a flow volume of the gaseous material through the safety valve () exceeds a shut-off volume. If the interior pressure (PX) in at least one tank () falls below a first threshold, at least one other tank () that was previously shut down is connected.

Method for operating a tank system

The invention relates to a fuel cell system () comprising: at least one fuel cell () which has a cathode () with a cathode chamber and has an anode chamber of an anode (), which anode chamber is separated from the cathode chamber by a membrane, wherein the cathode chamber is connected to a cathode gas source via at least one first fluid connection () and the anode chamber is connected to an anode gas source via at least one second fluid connection; and comprising a first electrical connection () to a DC/DC converter () that electrically connects the anode () and the cathode () to an energy system (), wherein in a shut-down phase of the fuel cell system (), residual energy present in the fuel cell () can be discharged. According to the invention, the anode () is connected to the energy system () and/or the cathode () via at least one second electrical connection (), wherein the second electrical connection () is a bypass connection to the DC/DC converter () and/or the second electrical connection () is a bypass connection parallel to the fuel cell (), wherein at least the residual energy can be discharged via the second electrical connection (), and the second electrical connection () comprises a resistor ().

Intrinsically safe bleed-down circuit and control strategy for fuel cell systems

The invention relates to a method for producing a flow plate () for a fuel cell (), comprising a plurality of gas guide webs () and at least one electrically conductive and porous layer unit () arranged on the gas guide webs (). It is proposed that a geometry and/or a structure of the layer unit () is produced during a material application onto the gas guide webs ().

Method for producing a flow plate for a fuel cell

Growing community of inventors

Vaihingen, Germany

Helerson Kemmer