DE102010007857A1 - Fuel cell system for use in car, has accumulator storing electrical power, and electrical power impacting unit provided for impacting of coolant pumps with electrical power, which is collected from accumulator - Google Patents
Fuel cell system for use in car, has accumulator storing electrical power, and electrical power impacting unit provided for impacting of coolant pumps with electrical power, which is collected from accumulator Download PDFInfo
- Publication number
- DE102010007857A1 DE102010007857A1 DE102010007857A DE102010007857A DE102010007857A1 DE 102010007857 A1 DE102010007857 A1 DE 102010007857A1 DE 102010007857 A DE102010007857 A DE 102010007857A DE 102010007857 A DE102010007857 A DE 102010007857A DE 102010007857 A1 DE102010007857 A1 DE 102010007857A1
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- Germany
- Prior art keywords
- fuel cell
- cell system
- electrical power
- coolant
- cooling circuit
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M16/00—Structural combinations of different types of electrochemical generators
- H01M16/003—Structural combinations of different types of electrochemical generators of fuel cells with other electrochemical devices, e.g. capacitors, electrolysers
- H01M16/006—Structural combinations of different types of electrochemical generators of fuel cells with other electrochemical devices, e.g. capacitors, electrolysers of fuel cells with rechargeable batteries
-
- 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
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04029—Heat exchange using liquids
-
- 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
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0438—Pressure; Ambient pressure; Flow
- H01M8/04417—Pressure; Ambient pressure; Flow of the coolant
-
- 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
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04746—Pressure; Flow
- H01M8/04768—Pressure; Flow of the coolant
-
- 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
- Y02E60/10—Energy storage using 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
- 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
- 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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Fuel Cell (AREA)
Abstract
Description
Die Erfindung betrifft ein Brennstoffzellensystem für ein Fahrzeug, mit einem Kühlkreislauf zum Kühlen von Komponenten des Brennstoffzellensystems. In dem Kühlkreislauf ist eine Pumpeinrichtung zum Pumpen eines Kühlmittels angeordnet. Des Weiteren umfasst das Brennstoffzellensystem einen Energiespeicher zum Speichern elektrischer Energie. Die Erfindung betrifft des Weiteren ein Verfahren zum Betreiben eines solchen Brennstoffzellensystems.The invention relates to a fuel cell system for a vehicle, with a cooling circuit for cooling components of the fuel cell system. In the cooling circuit, a pumping means for pumping a coolant is arranged. Furthermore, the fuel cell system comprises an energy store for storing electrical energy. The invention further relates to a method for operating such a fuel cell system.
Die
Das erstmalige Befüllen oder Neubefüllen des Kühlkreislaufs mit dem Kühlmittel ist bei aus dem Stand der Technik bekannten Brennstoffzellensystemen auch deswegen ein aufwändiger Vorgang, weil hierfür die Pumpe über eine externe Schnittstelle mit Spannung versorgt und mit einem Bediengerät angesteuert wird. Hierbei muss eine Bedienperson Steuerbefehle derart in das Bediengerät eingeben, dass die Pumpe den Brennstoffzellenstapel mit einem nicht zu hohen Kühlmittelmassenstrom beaufschlagt.The first-time filling or refilling of the cooling circuit with the coolant is therefore also a complicated process in fuel cell systems known from the prior art, because for this the pump is supplied with voltage via an external interface and activated with an operator device. In this case, an operator must input control commands into the operating device in such a way that the pump applies a not too high coolant mass flow to the fuel cell stack.
Aufgabe der vorliegenden Erfindung ist es daher, ein Brennstoffzellensystem der eingangs genannten Art zu schaffen, welches einen Befüllvorgang des Kühlkreislaufs mit Kühlmittel erleichtert.Object of the present invention is therefore to provide a fuel cell system of the type mentioned, which facilitates a filling process of the cooling circuit with coolant.
Diese Aufgabe wird durch ein Brennstoffzellensystem mit den Merkmalen des Patentanspruchs 1 und ein Verfahren mit dem Merkmalen des Patentanspruchs 7 gelöst. Vorteilhafte Ausgestaltungen mit zweckmäßigen Weiterbildungen der Erfindung sind in den abhängigen Patentansprüchen gegeben.This object is achieved by a fuel cell system having the features of
Das erfindungsgemäße Brennstoffzellensystem für ein Fahrzeug umfasst einen Kühlkreislauf zum Kühlen von Komponenten des Brennstoffzellensystems. In dem Kühlkreislauf ist eine Pumpeinrichtung zum Pumpen eines Kühlmittels angeordnet. Des Weiteren verfügt das Brennstoffzellensystem über einen Energiespeicher zum Speichern von elektrischer Energie, und es sind Mittel zum Beaufschlagen der Pumpeinrichtung mit aus dem Energiespeicher stammender elektrischer Energie vorgesehen. Da die elektrische Energie des systemeigenen Energiespeichers zum Antreiben der Pumpeinrichtung verwendet wird, kann das Anschließen der Pumpeinrichtung an eine externe Stromquelle, etwa über ein Netzteil, entfallen.The fuel cell system for a vehicle according to the invention comprises a cooling circuit for cooling components of the fuel cell system. In the cooling circuit, a pumping means for pumping a coolant is arranged. Furthermore, the fuel cell system has an energy store for storing electrical energy, and means are provided for applying the pumping device with electrical energy originating from the energy store. Since the electrical energy of the native energy storage is used to drive the pumping device, the connection of the pumping device to an external power source, such as a power supply, omitted.
Wenn nach dem Befüllen des Brennstoffzellenstapels und des Kühlkreislaufs mit dem Kühlmittel der Brennstoffzellenstapel in Betrieb genommen werden, kann die durch das Betreiben des Brennstoffzellenstapels bereitgestellte elektrische Energie zum Versorgen der Pumpeinrichtung herangezogen werden. Dem liegt die Erkenntnis zu Grunde, dass der Bennstoffzellenstapel eine Hochvolt-Spannung liefert, welche für die – üblicherweise als Hochvoltpumpe ausgebildete – Pumpeinrichtung zur Verfügung gestellt werden kann. Vor dem Anlaufen des Brennstoffzellenstapels steht jedoch diese Hochvolt-Spannung nicht zur Verfügung. Dadurch, dass auf das aufwändige Anschließen der Pumpeinrichtung an eine externe, nicht zu dem Brennstoffzellensystem gehörende Spannungsquelle verzichtet werden kann, kann der Befüllvorgang des Kühlkreislaufs besonders rasch und einfach erfolgen.If, after filling the fuel cell stack and the cooling circuit with the coolant, the fuel cell stack is put into operation, the electrical energy provided by the operation of the fuel cell stack can be used to supply the pumping device. This is based on the finding that the fuel cell stack supplies a high-voltage voltage which can be made available for the pumping device, which is usually designed as a high-voltage pump. Before starting the fuel cell stack, however, this high-voltage voltage is not available. Characterized in that can be dispensed with the complex connection of the pumping device to an external, not belonging to the fuel cell system voltage source, the filling process of the cooling circuit can be done very quickly and easily.
In einer vorteilhaften Ausgestaltung der Erfindung umfassen die Mittel einen Spannungswandler, sodass die aus dem Energiespeicher stammende elektrische Energie in genau die Spannung umgewandelt werden kann, welche für das Betreiben der Pumpeinrichtung besonders gut geeignet ist. Insbesondere können nämlich Pumpeinrichtungen zum Einsatz kommen, welche für eine Spannung aus dem Bereich von 150 V bis 400 V ausgelegt sind.In an advantageous embodiment of the invention, the means comprise a voltage converter, so that the electrical energy originating from the energy store can be converted into exactly the voltage which is particularly well suited for the operation of the pumping device. In particular, namely pumping devices can be used, which are designed for a voltage in the range of 150 V to 400 V.
In einer weiteren Ausgestaltung der Erfindung umfassen die Mittel eine Steuerungseinrichtung, mittels welcher eine Förderleistung der Pumpeinrichtung einstellbar ist. Es kann also in der Steuerungseinrichtung eine Routine hinterlegt sein, welche beim Befüllen des Kühlkreislaufs mit Kühlmittel dafür sorgt, dass der Brennstoffzellenstapel des Brennstoffzellensystems nicht mit einem sich unter zu hohem Druck befindenden Kühlmittel beaufschlagt wird. Solange nämlich der Brennstoffzellenstapel noch nicht mit Reaktionsgasen, etwa mit Wasserstoffgas und Luft zum Bereitstellen von Sauerstoff, beaufschlagt ist, kann ein zu großer Druck des Kühlmittels im Brennstoffzellenstapel eine Beschädigung des Brennstoffzellenstapels mit sich bringen. Dies kann durch die Steuerung mittels der Steuerungseinrichtung verhindert werden.In a further embodiment of the invention, the means comprise a control device, by means of which a delivery rate of the pumping device is adjustable. It can therefore be deposited in the control device a routine which ensures when filling the cooling circuit with coolant that the fuel cell stack of the fuel cell system is not subjected to a located under high pressure coolant. Namely, as long as the fuel cell stack is not yet charged with reaction gases such as hydrogen gas and air for providing oxygen, excessive pressure of the coolant in the fuel cell stack may cause damage to the fuel cell stack. This can be prevented by the control by means of the control device.
Bei dem erfindungsgemäßen Verfahren zum Betreiben eines Brennstoffzellensystems für ein Fahrzeug fördert eine in einem Kühlkreislauf zum Kühlen von Komponenten des Brennstoffzellensystems angeordnete Pumpeinrichtung Kühlmittel, wobei die Pumpeinrichtung mit aus einem Energiespeicher des Brennstoffzellensystems stammender elektrischer Energie beaufschlagt wird.In the method according to the invention for operating a fuel cell system for a vehicle, a pump device arranged in a cooling circuit for cooling components of the fuel cell system conveys coolant, wherein the pump device is acted upon by electrical energy originating from an energy store of the fuel cell system.
Die für das erfindungsgemäße Brennstoffzellensystem beschriebenen Vorteile und bevorzugten Ausführungsformen gelten auch für das erfindungsgemäße Verfahren. The advantages and preferred embodiments described for the fuel cell system according to the invention also apply to the method according to the invention.
Die vorstehend in der Beschreibung genannten Merkmale und Merkmalskombinationen sowie die nachfolgend in der Figurenbeschreibung genannten und/oder in der Figur alleine gezeigten Merkmale und Merkmalskombinationen sind nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar, ohne den Rahmen der Erfindung zu verlassen.The features and feature combinations mentioned above in the description as well as the features and feature combinations mentioned below in the figure description and / or shown alone in the figure can be used not only in the respectively specified combination, but also in other combinations or in isolation, without the scope of To leave invention.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus den Ansprüchen, der nachfolgenden Beschreibung bevorzugter Ausführungsformen sowie anhand der Zeichnung.Further advantages, features and details of the invention will become apparent from the claims, the following description of preferred embodiments and from the drawing.
Diese zeigt schematisch ein Brennstoffzellensystem für ein Fahrzeug mit einem Kühlkreislauf und Mitteln zum Ansteuern einer Kühlmittelpumpe beim Befüllen des Kühlkreislaufs.This shows schematically a fuel cell system for a vehicle with a cooling circuit and means for driving a coolant pump when filling the cooling circuit.
Ein in der Figur schematisch gezeigtes Brennstoffzellensystem
Bei der erstmaligen Inbetriebnahme des Brennstoffzellensystems
Um nun auf ein aufwändiges Anschließen der als Hochvolt-Pumpen ausgebildeten Kühlmittelpumpen
Die Mittel
In der Figur ist lediglich schematisch veranschaulicht, wie die Mittel
Ein Steuergerät
Zum Entlüften des jeweiligen Kühlkreislaufs
Die mittels der Steuereinrichtung
Während des Befüllvorgangs des jeweiligen Kühlkreislaufs
Da auch die Steuerbefehle zum Ansteuern und Überwachen der Drehzahl der Kühlmittelpumpen
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 1010
- BrennstoffzellensystemThe fuel cell system
- 1212
- Brennstoffzellenstapelfuel cell stack
- 1414
- Brennstoffzellenstapelfuel cell stack
- 1616
- KühlkreislaufCooling circuit
- 1818
- KühlkreislaufCooling circuit
- 2020
- KühlmittelpumpeCoolant pump
- 2222
- KühlmittelpumpeCoolant pump
- 2424
- Mittelmedium
- 2626
- Akkumulatoraccumulator
- 2828
- SpannungswandlerDC converter
- 3030
- Verteilerdistributor
- 3232
- Steuergerätcontrol unit
- 3434
- Druckfühlerpressure sensor
- 3636
- 3/2-Wegeventil3/2-way valve
- 3838
- 3/2-Wegeventil3/2-way valve
- 4040
- Zuleitungsupply
- 4242
- Zuleitungsupply
- 4444
- WärmeübertragerHeat exchanger
- 4646
- Entlüftungseinrichtungvent
- 4848
- Entlüftungseinrichtungvent
- 5050
- RückführungsleitungReturn line
- 5252
- RückführungsleitungReturn line
- 5454
- Filterfilter
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
- US 202/0160245 A1 [0002] US 202/0160245 A1 [0002]
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010007857A DE102010007857A1 (en) | 2010-02-12 | 2010-02-12 | Fuel cell system for use in car, has accumulator storing electrical power, and electrical power impacting unit provided for impacting of coolant pumps with electrical power, which is collected from accumulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010007857A DE102010007857A1 (en) | 2010-02-12 | 2010-02-12 | Fuel cell system for use in car, has accumulator storing electrical power, and electrical power impacting unit provided for impacting of coolant pumps with electrical power, which is collected from accumulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE102010007857A1 true DE102010007857A1 (en) | 2011-08-18 |
Family
ID=44317143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE102010007857A Withdrawn DE102010007857A1 (en) | 2010-02-12 | 2010-02-12 | Fuel cell system for use in car, has accumulator storing electrical power, and electrical power impacting unit provided for impacting of coolant pumps with electrical power, which is collected from accumulator |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE102010007857A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130171536A1 (en) * | 2012-01-03 | 2013-07-04 | Air Liquide, Societe Anonyme Pour Etude Et Exploitation Des Procedes Georges Claude | Fuel Cell |
| DE102013201332A1 (en) | 2013-01-29 | 2014-07-31 | Robert Bosch Gmbh | Cooling system for battery system of vehicle, has arrangement with separator that is arranged with respect to gravity of highest level within assembly and adapted to separate coolant containing gas from cooling system |
| US20140370409A1 (en) * | 2013-06-13 | 2014-12-18 | Hyundai Motor Company | Cooling pump driving system |
| WO2019204849A1 (en) * | 2018-04-26 | 2019-10-31 | Avl List Gmbh | Fuel cell system |
| DE102018005022A1 (en) | 2018-06-22 | 2019-12-24 | Daimler Ag | Cooling circuit |
| DE102018214640A1 (en) * | 2018-08-29 | 2020-03-05 | Nikola Corp. | Cooling system for fuel cell stacks |
| CN112740452A (en) * | 2018-08-29 | 2021-04-30 | 罗伯特·博世有限公司 | Method for operating a fuel cell system of a motor vehicle |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200160245A1 (en) | 2018-11-15 | 2020-05-21 | Honda Motor Co., Ltd. | Vehicle production and distribution system for ride share programs and method thereof |
-
2010
- 2010-02-12 DE DE102010007857A patent/DE102010007857A1/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200160245A1 (en) | 2018-11-15 | 2020-05-21 | Honda Motor Co., Ltd. | Vehicle production and distribution system for ride share programs and method thereof |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2985382A1 (en) * | 2012-01-03 | 2013-07-05 | Air Liquide | FUEL CELL |
| EP2613391A1 (en) * | 2012-01-03 | 2013-07-10 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Fuel cell |
| US20130171536A1 (en) * | 2012-01-03 | 2013-07-04 | Air Liquide, Societe Anonyme Pour Etude Et Exploitation Des Procedes Georges Claude | Fuel Cell |
| DE102013201332A1 (en) | 2013-01-29 | 2014-07-31 | Robert Bosch Gmbh | Cooling system for battery system of vehicle, has arrangement with separator that is arranged with respect to gravity of highest level within assembly and adapted to separate coolant containing gas from cooling system |
| US20140370409A1 (en) * | 2013-06-13 | 2014-12-18 | Hyundai Motor Company | Cooling pump driving system |
| US11646429B2 (en) | 2018-04-26 | 2023-05-09 | Avl List Gmbh | Fuel cell system |
| WO2019204849A1 (en) * | 2018-04-26 | 2019-10-31 | Avl List Gmbh | Fuel cell system |
| CN112074980B (en) * | 2018-04-26 | 2023-10-27 | Avl李斯特有限公司 | fuel cell system |
| CN112074980A (en) * | 2018-04-26 | 2020-12-11 | Avl李斯特有限公司 | Fuel cell system |
| DE102018005022A1 (en) | 2018-06-22 | 2019-12-24 | Daimler Ag | Cooling circuit |
| US11427108B2 (en) * | 2018-08-29 | 2022-08-30 | Nikola Corporation | Method for operating a fuel cell system for a motor vehicle |
| CN112740452A (en) * | 2018-08-29 | 2021-04-30 | 罗伯特·博世有限公司 | Method for operating a fuel cell system of a motor vehicle |
| DE102018214640A1 (en) * | 2018-08-29 | 2020-03-05 | Nikola Corp. | Cooling system for fuel cell stacks |
| CN112740452B (en) * | 2018-08-29 | 2024-09-13 | 罗伯特·博世有限公司 | Method for operating a fuel cell system for a motor vehicle |
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| R005 | Application deemed withdrawn due to failure to request examination | ||
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Free format text: PREVIOUS MAIN CLASS: H01M0008040000 Ipc: H01M0008040070 |