DE102013203890A1 - Fuel cell system with an oxygenating device - Google Patents

Fuel cell system with an oxygenating device Download PDF

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Publication number
DE102013203890A1
DE102013203890A1 DE102013203890.9A DE102013203890A DE102013203890A1 DE 102013203890 A1 DE102013203890 A1 DE 102013203890A1 DE 102013203890 A DE102013203890 A DE 102013203890A DE 102013203890 A1 DE102013203890 A1 DE 102013203890A1
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Prior art keywords
air
fuel cell
cell system
supply line
air supply
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DE102013203890.9A
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German (de)
Inventor
Daniel Assenbaum
Johannes Koppi
Michael Bauer
Sylvester Burckhardt
Tomas Cahalan
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L7/00—Electrodynamic brake systems for vehicles in general
    • B60L7/10—Dynamic electric regenerative braking
    • B60L7/12—Dynamic electric regenerative braking for vehicles propelled by dc motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • B60L1/003—Supplying electric power to auxiliary equipment of vehicles to auxiliary motors, e.g. for pumps, compressors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B60L15/2045—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for optimising the use of energy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/52—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by DC-motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/70—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by fuel cells
    • B60L50/72—Constructional details of fuel cells specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
    • B60L58/32—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load
    • B60L58/33—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load by cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/40—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for controlling a combination of batteries and fuel cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
    • H01M8/0662—Treatment of gaseous reactants or gaseous residues, e.g. cleaning
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
    • H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells

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  • Engineering & Computer Science (AREA)
  • Sustainable Energy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel Cell (AREA)

Abstract

Die Erfindung betrifft ein Brennstoffzellensystem mit einer Luftfördereinrichtung zur Versorgung einer Elektrodenseite der Einzelzellen des Brennstoffzellensystems über eine Luft-Versorgungsleitung, sowie mit einer Sauerstoffanreicherungsvorrichtung, welche in einem stromab der Luftfördereinrichtung liegenden Abzweig von der Luft-Versorgungsleitung vorgesehen ist und damit von der Luftfördereinrichtung Umgebungsluft erhält, von der eine Teilmenge mit erhöhtem Sauerstoffanteil mittels der gleichen Luftfördereinrichtung über eine Ausgangsleitung der Sauerstoffanreicherungsvorrichtung letztlich den Elektrodenseiten der Einzelzellen zugeführt wird, wobei die Ausgangsleitung der Sauerstoffanreicherungsvorrichtung über eine Einleitung nach Art einer Strahlpumpe (Ejektor) stromab der Luftfördereinrichtung in der Luft-Versorgungsleitung mündet. Bei einem erfindungsgemäßen Brennstoffzellensystem in einem Kraftfahrzeug mit zumindest einer mit dem Fahrzeugantrieb gekoppelten Elektromaschine, die im Schubbetrieb oder Bremsbetrieb des Kraftfahrzeugs als elektrischer Generator arbeitet, wird zumindest ein Teil der hierbei erzeugten elektrischen Energie direkt, d. h. ohne elektrische Zwischenspeicherung, für den Antrieb der Luftfördereinrichtung verwendet.The invention relates to a fuel cell system with an air delivery device for supplying an electrode side of the individual cells of the fuel cell system via an air supply line, and with an oxygen enrichment device which is provided in a branch downstream of the air delivery device and thus receives ambient air from the air delivery device. a portion of which with an increased oxygen content is ultimately fed to the electrode sides of the individual cells by means of the same air delivery device via an output line of the oxygen enrichment device, the output line of the oxygen enrichment device opening into the air supply line downstream of the air feed device via a jet pump type (ejector). In a fuel cell system according to the invention in a motor vehicle with at least one electric machine coupled to the vehicle drive, which operates as an electrical generator in overrun or braking operation of the motor vehicle, at least part of the electrical energy generated in this way is generated directly, ie. H. without intermediate electrical storage, used to drive the air conveyor.

Description

Die Erfindung betrifft ein Brennstoffzellensystem mit einer Luftfördereinrichtung zur Versorgung einer Elektrodenseite der Einzelzellen des Brennstoffzellensystems über eine Luft-Versorgungsleitung, sowie mit einer Sauerstoffanreicherungsvorrichtung, welche in einem stromab der Luftfördereinrichtung liegenden Abzweig von der Luft-Versorgungsleitung vorgesehen ist und damit von der Luftfördereinrichtung Umgebungsluft erhält, von der eine Teilmenge mit erhöhtem Sauerstoffanteil über eine Ausgangsleitung der Sauerstoffanreicherungsvorrichtung letztlich den Elektrodenseiten der Einzelzellen zugeführt wird bzw. zuführbar ist. Zum Stand der Technik wird insbesondere auf die DE 10 2011 100 839 A1 und zu einer Weiterbildung der Erfindung auf die DE 197 31 642 C1 verwiesen.The invention relates to a fuel cell system with an air conveying device for supplying an electrode side of the individual cells of the fuel cell system via an air supply line, and with an oxygen enrichment device, which is provided in a downstream of the air conveyor branch of the air supply line and thus receives ambient air from the air conveyor, of which a subset with an increased oxygen content via an output line of the oxygenating device is ultimately supplied to the electrode sides of the individual cells or can be fed. The prior art is particularly to the DE 10 2011 100 839 A1 and to a development of the invention to the DE 197 31 642 C1 directed.

In der erstgenannten Schrift ist sowohl die Technologie von Brennstoffzellen als auch von diesen zugeordneten Sauerstoffanreicherungsvorrichtungen ausreichend beschrieben, weshalb vorliegend auf Details hierzu nicht näher eingegangen wird. Ebenfalls ist in dieser Schrift der Stand der Technik zur „funktionalen Verschaltung” einer Sauerstoffanreichungsvorrichtung beschrieben, nämlich dass eine solche bislang in der hier sog. Luft-Versorgungsleitung angeordnet wird, über die die Elektrodenseiten der üblicherweise zu einem Stack oder Stapel zusammen geschalteten Einzel-Brennstoffzellen (= „Einzelzellen”) Umgebungsluft mit erhöhtem Sauerstoffanteil erhalten. Da eine solche Sauerstoffanreicherungsvorrichtung einen relativ hohen Strömungswiderstand besitzt, ist in der genannten DE 10 2011 100 839 A1 vorgeschlagen, nur eine vorzugsweise steuerbare Teilmenge des von der Luftfördereinrichtung geförderten Umgebungsluftstromes durch die Sauerstoffanreicherungsvorrichtung zu führen und den daraus (über eine vorliegend sog. Ausgangsleitung) abgeführten Luftanteil mit erhöhtem Sauerstoffanteil der Saugseite der Luftfördervorrichtung zuzuführen und damit diesen quasi zu rezirkulieren.In the first-mentioned document, both the technology of fuel cells and oxygen-enrichment devices assigned to them are sufficiently described, for which reason details will not be discussed in detail here. Also described in this document is the state of the art for the "functional interconnection" of an oxygenation apparatus, namely that such is so far arranged in the so-called air supply line, via which the electrode sides of the stacked or stacked individual fuel cells (= "Single cells") Ambient air obtained with increased oxygen content. Since such an oxygenating device has a relatively high flow resistance, is in said DE 10 2011 100 839 A1 proposed to lead only a preferably controllable subset of promoted by the air conveyor ambient air flow through the oxygenating device and the supplied (via a presently so-called output line) discharged air fraction with increased oxygen content of the suction side of the air conveyor and thus to recycle this quasi.

Damit stellt sich jedoch wieder ein Nachteil ein, indem nämlich bereits mit Sauerstoff angereicherte Umgebungsluft neuerlich anteilig in die Sauerstoffanreicherungsvorrichtung geleitet wird, was deren Wirkungsgrad herabsetzt. Andererseits kann aufgrund der Druckverluste in der Sauerstoffanreicherungsvorrichtung der über deren vorliegend sog. Ausgangsleitung abgeführte Luftstrom mit erhöhtem Sauerstoffanteil nicht einfach in ein Luftzuführungssystem eines Brennstoffzellensystems stromab einer darin vorgesehenen Luftfördereinrichtung eingeleitet werden.However, this is again a disadvantage, namely by already enriched with oxygen ambient air again proportionally directed into the oxygenating device, which reduces their efficiency. On the other hand, owing to the pressure losses in the oxygen enrichment device, the air stream with an increased oxygen content removed via its presently referred to outlet line can not simply be introduced into an air supply system of a fuel cell system downstream of an air conveying device provided therein.

Eine Abhilfemaßnahme für diese geschilderte Problematik aufzuzeigen, ist Aufgabe der vorliegenden Erfindung. Die Lösung dieser Aufgabe ist für ein Brennstoffzellensystem nach dem Oberbegriff des Anspruchs 1 dadurch gekennzeichnet, dass die Ausgangsleitung der Sauerstoffanreicherungsvorrichtung über eine Einleitung nach Art einer Strahlpumpe stromab der Luftfördereinrichtung in der Luft-Versorgungsleitung mündet. Eine solche in Form eines Ejektors in der Luft-Versorgungsleitung vorgesehene und vom Luftstrom der Luftfördereinrichtung „getriebene” Fördervorrichtung für den Luftanteil mit erhöhtem Sauerstoffanteil zeichnet sich bei ausreichendem Wirkungsgrad durch minimalen Aufwand aus. Noch weiter gesteigert werden kann der Gesamtwirkungsgrad eines erfindungsgemäßen Brennstoffzellensystems in einem Kraftfahrzeug mit zumindest einer mit dem Fahrzeugantrieb gekoppelten Elektromaschine, die im Schubbetrieb oder Bremsbetrieb des Kraftfahrzeugs als elektrischer Generator arbeitet, wenn zumindest ein Teil der hierbei erzeugten elektrischen Energie direkt, d. h. ohne elektrische Zwischenspeicherung, für den Antrieb der Luftfördereinrichtung verwendet wird.To point out a remedy for this problem is the object of the present invention. The solution to this problem is for a fuel cell system according to the preamble of claim 1, characterized in that the output line of the oxygenating device opens via an introduction in the manner of a jet pump downstream of the air conveyor in the air supply line. Such provided in the air supply line in the form of an ejector and the air flow of the air conveyor "driven" conveying device for the proportion of air with increased oxygen content is characterized with sufficient efficiency by minimal effort. The overall efficiency of a fuel cell system according to the invention in a motor vehicle having at least one electric machine coupled to the vehicle drive, which operates as an electric generator during coasting or braking operation of the motor vehicle, can be increased even further if at least a portion of the electrical energy generated in this case is generated directly, ie. H. without electrical intermediate storage, is used to drive the air conveyor.

Näher erläutert wird die Erfindung anhand der beigefügten Prinzipskizze, die die erfindungswesentlichen Elemente neben weiteren Elementen in einer sinnvollen erfindungsgemäßen Anordnung zeigt. Dabei trägt ein Brennstoffzellensystem, gebildet durch einen Stack von Einzel-Brennstoffzellen und der zugehörigen vorliegend nicht wesentlichen Peripherie („Balance of Plant”) die Bezugsziffer 1, während eine erfindungswesentliche Luftfördereinrichtung beliebiger Art (vgl. bspw. die o. g. DE 10 2011 100 839 A1 ) mit der Bezugsziffer 2 und eine erfindungswesentliche Sauerstoffanreicherungsvorrichtung beliebiger Art (vgl. auch hierzu beispielsweise die o. g. DE 10 2011 100 839 A1) mit der Bezugsziffer 3 gekennzeichnet ist.The invention will be explained in more detail with reference to the attached schematic diagram, which shows the elements essential to the invention in addition to other elements in a meaningful arrangement according to the invention. Here, a fuel cell system, formed by a stack of individual fuel cells and the associated presently not essential periphery ("balance of plant") carries the reference numeral 1 , while an essential to the invention air conveyor device of any kind (see, for example, the above DE 10 2011 100 839 A1 ) with the reference number 2 and an oxygen enrichment device of any type essential to the invention (cf., for example, the above-mentioned DE 10 2011 100 839 A1) with the reference number 3 is marked.

Die Luftfördereinrichtung 2 fördert Umgebungsluft gemäß Pfeil L in eine Luft-Versorgungsleitung 4 für das Brennstoffzellensystem 1 zunächst über einen Kühler 5 zu einer Abzweigstelle A, in der ein Abzweig 6 von der letztlich im Brennstoffzellensystem 1 an den entsprechenden Elektrodenseiten der Einzelzellen mündenden Luft-Versorgungsleitung 4 abzweigt. Stromab der Abzweigstelle A ist ein Luftmengenstellglied 7 vorgesehen, mit Hilfe dessen der Anteil der in den Abzweig 6 gelangenden Luftmenge steuerbar ist. Stromab dessen ist ein Luftbefeuchter 8 vorgesehen und stromab dessen befindet sich in der Luft-Versorgungsleitung 4 eine erfindungsgemäße Strahlpumpe 9, die der in der Luft-Versorgungsleitung 4 geführte Umgebungs-Luftstrom passiert, ehe er ins Brennstoffzellensystem 1 und dabei letztendlich zu den entsprechenden Elektrodenseiten von dessen Einzelzellen gelangt.The air conveyor 2 conveys ambient air according to arrow L in an air supply line 4 for the fuel cell system 1 first over a cooler 5 to a branch point A, in which a branch 6 from the end in the fuel cell system 1 at the corresponding electrode sides of the individual cells opening air supply line 4 branches. Downstream of the branch point A is an air quantity actuator 7 provided by means of which the proportion of the branch 6 passing amount of air is controllable. Downstream of this is a humidifier 8th provided and downstream of which is located in the air supply line 4 a jet pump according to the invention 9 that in the air supply line 4 guided ambient airflow passes before entering the fuel cell system 1 and ultimately reaches the corresponding electrode sides of its individual cells.

Im genannten Abzweig 6 befindet sich insbesondere die erfindungswesentliche Sauerstoffanreicherungsvorrichtung 3 und ggf. stromauf derselben ein weiterer Kühler 10 zur Kühlung der im Abzweig 6 der Sauerstoffanreicherungsvorrichtung 3 zugeführten Umgebungsluft. Aus der Sauerstoffanreicherungsvorrichtung 3 heraus gelangt der einen erhöhten Sauerstoffanteil aufweisende Luftstrom durch eine Ausgangsleitung 11 (der Sauerstoffanreicherungsvorrichtung 3) in die Luft-Versorgungsleitung 4 stromab des Luftmengenstellglieds 7 und insbesondere auch stromab der Luftfördervorrichtung 2. Um dabei den Druckverlust in der Sauerstoffanreicherungsvorrichtung 3 zu kompensieren, mündet die Ausgangsleitung 11 geeignet, nämlich wie bei „Saugstrahlpumpen” üblich (und dem Fachmann bekannt) in der in der Luft-Versorgungsleitung 4 vorgesehenen und als Ejektor wirkenden Strahlpumpe 9, deren Treibmedium der vom Luftbefeuchter 8 kommende Luftstrom ist, während die mit Sauerstoff angereicherte Luft das mit der Strahlpumpe 9 angesaugte Medium ist. Dabei zeichnet sich eine solche Strahlpumpe 9 als Fördervorrichtung für den Luftanteil mit erhöhtem Sauerstoffanteil bei ausreichend hohem Wirkungsgrad durch minimalen Aufwand aus.In the mentioned branch 6 is in particular the invention essential Oxygenator 3 and possibly another cooler upstream of it 10 for cooling in the branch 6 the oxygenating device 3 supplied ambient air. From the oxygenating device 3 out of the increased oxygen content having air flow passes through an output line 11 (the oxygenating device 3 ) in the air supply line 4 downstream of the air flow actuator 7 and in particular also downstream of the air conveying device 2 , Thereby the pressure loss in the oxygenating device 3 to compensate, the output line flows 11 as is customary with "suction jet pumps" (and known to those skilled in the art) in the air supply line 4 provided and acting as an ejector jet pump 9 whose propellant is that of the humidifier 8th incoming airflow is, while the oxygen-enriched air with the jet pump 9 sucked medium is. In this case, such a jet pump is characterized 9 as a conveying device for the proportion of air with increased oxygen content at sufficiently high efficiency through minimal effort.

Weiterhin ist in der beigefügten Prinzipskizze mit der Bezugsziffer 12 eine Elektromaschine eines Kraftfahrzeugs gekennzeichnet, in dem das erfindungsgemäße Brennstoffzellensystem verbaut ist, welche Elektromaschine 12 an den Antriebsstrang des Kraftfahrzeugs gekoppelt oder Bestandteil desselben ist, so dass mit dieser üblicherweise als Antriebsmotor fungierenden Elektromaschine 12 im Schubbetrieb oder Bremsbetrieb des Kraftfahrzeugs in an sich bekannter Weise elektrische Energie erzeugbar ist. Diese in der Elektromaschine im Sinne einer Rekuperation der kinetischen Energie des Kraftfahrzeugs erzeugte elektrische Energie kann über als Linien dargestellte Elektroleitungen einem elektrischen Energiespeicher 13 zugeführt werden oder wird direkt, d. h. unter Umgehung dieses elektrischen Energiespeichers 13 anderen elektrischen Komponenten des Brennstoffzellensystems 1, insbesondere dem elektrischen Antrieb der Luftfördervorrichtung 2 zugeführt, womit der Wirkungsgrad des Gesamtsystems weiter erhöht wird. Die geeignete Steuerung der einzelnen Elemente oder Komponenten des Systems einschließlich einer günstigen Verteilung des elektrischen Stroms übernimmt dabei eine elektronische Steuereinheit 14 über gestrichelt dargestellte Steuerleitungen und Stromleitungen.Furthermore, in the accompanying schematic diagram with the reference numeral 12 an electric machine of a motor vehicle characterized in which the fuel cell system according to the invention is installed, which electric machine 12 is coupled to the drive train of the motor vehicle or part of the same, so that with this usually acting as a drive motor electric machine 12 electrical energy can be generated in a manner known per se during coasting or braking operation of the motor vehicle. This electrical energy generated in the electric machine in the sense of recuperation of the kinetic energy of the motor vehicle can be generated via electric lines represented as lines by an electrical energy store 13 be supplied or is directly, ie bypassing this electrical energy storage 13 other electrical components of the fuel cell system 1 , in particular the electric drive of the air conveyor device 2 supplied, whereby the efficiency of the overall system is further increased. The appropriate control of the individual elements or components of the system including a favorable distribution of the electric current takes over an electronic control unit 14 dashed lines shown control lines and power lines.

ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION

Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Zitierte PatentliteraturCited patent literature

  • DE 102011100839 A1 [0001, 0002, 0005] DE 102011100839 A1 [0001, 0002, 0005]
  • DE 19731642 C1 [0001] DE 19731642 C1 [0001]

Claims (2)

Brennstoffzellensystem mit einer Luftfördereinrichtung (2) zur Versorgung einer Elektrodenseite der Einzelzellen des Brennstoffzellensystems (1) über eine Luft-Versorgungsleitung (4), sowie mit einer Sauerstoffanreicherungsvorrichtung (3), welche in einem stromab der Luftfördereinrichtung (2) liegenden Abzweig (6) von der Luft-Versorgungsleitung (4) vorgesehen ist und damit von der Luftfördereinrichtung (2) Umgebungsluft erhält, von der eine Teilmenge mit erhöhtem Sauerstoffanteil über eine Ausgangsleitung (11) der Sauerstoffanreicherungsvorrichtung (3) letztlich den Elektrodenseiten der Einzelzellen zugeführt wird, dadurch gekennzeichnet, dass die Ausgangsleitung (11) der Sauerstoffanreicherungsvorrichtung (3) über eine Einleitung nach Art einer Strahlpumpe (9) stromab der Luftfördereinrichtung (2) in der Luft-Versorgungsleitung (4) mündet.Fuel cell system with an air conveyor ( 2 ) for supplying an electrode side of the individual cells of the fuel cell system ( 1 ) via an air supply line ( 4 ), as well as with an oxygenating device ( 3 ) located in a downstream of the air conveyor ( 2 ) branch ( 6 ) from the air supply line ( 4 ) is provided and thus by the air conveyor ( 2 ) Receives ambient air, of which a subset with increased oxygen content via an output line ( 11 ) of the oxygenating device ( 3 ) is ultimately fed to the electrode sides of the individual cells, characterized in that the output line ( 11 ) of the oxygenating device ( 3 ) via an introduction in the manner of a jet pump ( 9 ) downstream of the air conveyor ( 2 ) in the air supply line ( 4 ) opens. Brennstoffzellensystem nach Anspruch 1 in einem Kraftfahrzeug mit zumindest einer mit dem Fahrzeugantrieb gekoppelten Elektromaschine (12), die im Schubbetrieb oder Bremsbetrieb des Kraftfahrzeugs als elektrischer Generator arbeitet, wobei zumindest ein Teil der hierbei erzeugten elektrischen Energie direkt, d. h. ohne elektrische Zwischenspeicherung, für den Antrieb der Luftfördereinrichtung (2) verwendet wird.Fuel cell system according to claim 1 in a motor vehicle with at least one electric machine coupled to the vehicle drive ( 12 ), which operates in overrun mode or braking mode of the motor vehicle as an electric generator, wherein at least a portion of the electrical energy generated in this case directly, ie without electrical intermediate storage, for the drive of the air conveyor ( 2 ) is used.
DE102013203890.9A 2013-03-07 2013-03-07 Fuel cell system with an oxygenating device Withdrawn DE102013203890A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19731642C1 (en) 1997-07-23 1999-02-18 Dbb Fuel Cell Engines Gmbh Fuel cell vehicle
US20020127442A1 (en) * 2000-12-08 2002-09-12 Connor Denis J. Methods and apparatuses for gas separation by pressure swing adsorption with partial gas product feed to fuel cell power source
JP2006066204A (en) * 2004-08-26 2006-03-09 Toyota Motor Corp Fuel cell system
DE112009003573T5 (en) * 2008-12-12 2012-07-05 Ezelleron Gmbh Fuel cell system with reoxidation barrier
DE102011100839A1 (en) 2011-05-07 2012-11-08 Volkswagen Aktiengesellschaft Fuel cell assembly of fuel cell electric vehicle, has oxygen enriching apparatus arranged for increasing oxygen content in oxygen-containing gas mixture which is supplied to cathode chamber from cathode gas supply

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19731642C1 (en) 1997-07-23 1999-02-18 Dbb Fuel Cell Engines Gmbh Fuel cell vehicle
US20020127442A1 (en) * 2000-12-08 2002-09-12 Connor Denis J. Methods and apparatuses for gas separation by pressure swing adsorption with partial gas product feed to fuel cell power source
JP2006066204A (en) * 2004-08-26 2006-03-09 Toyota Motor Corp Fuel cell system
DE112009003573T5 (en) * 2008-12-12 2012-07-05 Ezelleron Gmbh Fuel cell system with reoxidation barrier
DE102011100839A1 (en) 2011-05-07 2012-11-08 Volkswagen Aktiengesellschaft Fuel cell assembly of fuel cell electric vehicle, has oxygen enriching apparatus arranged for increasing oxygen content in oxygen-containing gas mixture which is supplied to cathode chamber from cathode gas supply

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