EP4226444A1 - Verfahren zum nach einem stillstand erfolgenden hochfahren eines brennstoffzellensystems - Google Patents
Verfahren zum nach einem stillstand erfolgenden hochfahren eines brennstoffzellensystemsInfo
- Publication number
- EP4226444A1 EP4226444A1 EP21787345.4A EP21787345A EP4226444A1 EP 4226444 A1 EP4226444 A1 EP 4226444A1 EP 21787345 A EP21787345 A EP 21787345A EP 4226444 A1 EP4226444 A1 EP 4226444A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- anode gas
- fuel
- phase
- fuel cell
- anode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
- H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
- H01M8/04225—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells during start-up
-
- 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
- H01M8/04—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
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04097—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with recycling of the 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
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04111—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants using a compressor turbine assembly
-
- 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
- H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
- H01M8/04231—Purging of the 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
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/043—Processes for controlling fuel cells or fuel cell systems applied during specific periods
- H01M8/04302—Processes for controlling fuel cells or fuel cell systems applied during specific periods applied during start-up
-
- 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
- H01M8/04753—Pressure; Flow of fuel cell 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
- H01M8/04298—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
- H01M8/04761—Pressure; Flow of fuel cell exhausts
-
- 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
- H01M8/04955—Shut-off or shut-down of 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
- H01M8/06—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
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M2008/1095—Fuel cells with polymeric electrolytes
-
- 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
Definitions
- the present invention relates to a fuel cell system which comprises an actual fuel cell with an arrangement of several individual cells each having an anode section, an electrolyte membrane and a cathode section, a fuel source opening out at an anode gas inlet, and a fuel source metering device comprising anode gas supply, a cathode gas supply and an anode gas outlet with the recirculation gas inlet of a mixer arranged in the anode gas supply connecting anode gas recirculation device.
- the present invention relates to starting up such a fuel cell system after a standstill.
- US 2019/0148746 A1 which relates to a fuel cell system with passive anode gas recirculation, an active solenoid valve that can be actuated via an actuator is provided within the anode gas recirculation device.
- Such a pulsed mode of operation of a valve arrangement provided in the anode gas supply is considered to be such a convection-enhancing measure, which already during the starting phase Anode gas recirculation is initiated, so that even when the outlet valve of the anode section is closed, intensive mixing of the anode-side gases is achieved.
- Other proposals go in the opposite direction, namely carrying out more or less complex (unproductive) rinsing cycles.
- the present invention is therefore based on the task of finding a remedy with regard to the standstill problem of fuel cells and finding a practical solution, particularly in Form of a method improved compared to the method according to DE 10 2011 105 054 A1 for starting up a fuel cell after a standstill, in particular a low-temperature fuel cell operated with hydrogen, or a fuel cell system comprising such a fuel cell.
- This task is solved according to the invention by starting up a fuel cell system that has a passive anode gas re-circulation device in at least two phases, in such a way that in a first phase of the start-up (“initialization phase”) the fuel cell is supplied with fuel from the fuel source in is put into operation, the anode gas recirculation being suppressed--without an active shut-off of the anode gas recirculation device by means of an element actuated externally, in particular by the activation of an associated actuator by a control unit--and only in a second phase of the ramp-up which follows the first phase in terms of time ( "Consolidation phase") in addition to the supply of fuel from the fuel source, an anode gas recirculation takes place.
- the invention thus expressly departs from the technical teaching conveyed by DE 10 2011 105 054 A1, in that an anode gas recirculation is suppressed or prevented in the starting phase.
- a valve that may be present in the anode gas outlet is not closed, but rather open, in contrast to what is suggested in DE 10 2011 105 054 A1.
- the invention is thus based on the finding that the recirculation of the anode gas via the recirculation device when initializing the start-up of the fuel cell is disadvantageous rather than advantageous.
- the anode gas recirculation is not suppressed (i.e.
- anode gas recirculation device completely or at least largely suppressed) by an element embedded in the (passive) anode gas recirculation device and actuated externally (in particular by the activation of an associated actuator by a control unit); because the anode gas recirculation device does not have such an externally actuated element.
- the anode gas recirculation device does not play a role during the initialization phase, completely or at least largely as if it were not present at all.
- the amount of gas present there--the amount of gas is quite significant because of the typically large flow cross-sections of the anode gas recirculation device--is irrelevant for the first phase of starting up the fuel cell, d. H .
- it does not inhibit the flushing and initialization processes or interfere in any other way.
- the mixer is formed by a jet pump, then it is—according to another particularly advantageous development of the invention—only the mode of operation of the jet pump that suppresses anode gas recirculation in the initialization phase.
- the jet pump is therefore operated in the initialization phase in such a way that its suction effect generated at the recirculation gas inlet is negligible or at least so small that—taking into account the other flow-related influencing variables—there is no appreciable anode gas recirculation.
- all measures that are based on a strong or increased suction of the mixer Such measures are only adopted in the consolidation phase, in which - with a corresponding delay - the anode gas recirculation is activated.
- the jet pump (forming the mixer) is influenced in such a way that in the initialization phase at the recirculation gas inlet there is no suction effect that causes a (significant) anode gas recirculation, solely by influencing the fuel supply to the mixer.
- a pulsating supply of fuel to the jet nozzle can be deliberately dispensed with in the initialization phase, d. H . the fuel (Hydrogen f, etc.) of the jet pump are supplied as uniformly as possible with a more or less constant low mass flow.
- the apparatus configurations of the anode gas recirculation device and the mixer (the jet pump) in the first and the second phase of starting up the fuel cell, d. H . be identical during the initialization phase and the consolidation phase, in that the different operating properties result exclusively from varying the fuel supply to the mixer.
- the equipment configuration of the anode gas recirculation device and/or the mixer (the jet pump) in the initialization phase differs from that in the consolidation phase - with the proviso that the anode gas recirculation device does not have an active switchable shut-off device (cf. US 2019/0148746 Al) is equipped.
- the change in the equipment configuration of the mixer (the jet pump) can be done, for example, via a—possibly Modification of the position of the propulsion nozzle relative to the other components is carried out directly from the fuel inlet pressure existing in the fuel supply and is directly caused by corresponding pressure changes; because the suction behavior of the jet pump is decisively dependent on this.
- the equipment configuration of the anode gas recirculation device can be changed in particular via an optional passive closure device.
- a device that influences the flow through the anode gas recirculation device and that works without external energy and without external control and is suitable for blocking the flow cross section of the anode gas recirculation device is to be regarded as a passive closure device in this sense. Switching between the blocking position and the (completely) open position takes place independently, automatically and without further ado on the basis of an internal variable, namely the pressure conditions prevailing in the area of the closure device itself.
- the passive closure device has a distinct switching point so that, if the appropriate conditions (e.g. pressure conditions) are present, it more or less suddenly switches from its blocking state to the state of the Release of the maximum flow cross-section overrides (switches) .
- a locking device that is suitable for this as a whole proves to be particularly suitable is described in detail below.
- FIG. 1 shows a schematic representation of a first fuel cell system suitable for carrying out the invention, the fuel cell being symbolized by one of its individual cells,
- FIG. 2 shows a schematic representation of a second fuel cell system suitable for carrying out the invention
- FIG. 3 shows an enlarged representation of the passive closure device implemented in the fuel cell system according to FIG. 2 in the closed and in the open position.
- Fig. 1 shows schematically a suitable for carrying out the invention fuel cell system 1.
- This includes in particular a - symbolized by one of its individual cells - fuel cell 3 and a fuel metering device in the form of a jet pump control valve unit 5.
- the fuel cell 3 has in the usual way a Anode compartment 7, a cathode compartment 9 and an electrolyte membrane 11 separating the anode compartment 7 and the cathode compartment 9 from one another.
- the jet pump control valve unit 5 comprises a jet pump 13 forming a mixer and a fuel gas control valve 15 and is connected to the anode chamber 7 via a suction connection 17 and a pressure connection 19 .
- the fuel gas which is under high pressure in the fuel source 25, first passes through an open shut-off valve 27 before its pressure is reduced in a pressure reducer 29. Regulated by the fuel gas control valve 15, the fuel gas flows, forming the propellant gas, then into the jet pump 13, ie into its propellant jet nozzle.
- a control unit C of the fuel cell system acts on the fuel gas control valve 15 in particular.
- the fuel supply to the jet pump 13 can be influenced in a number of ways via the corresponding effect.
- the fuel throughput (averaged over time), ie the average amount of fuel per unit of time, can be adjusted.
- the characteristics of the fuel supply can be adjusted within a considerable range. This ranges from a steady, continuous flow of fuel gas through the fuel gas control valve 15, which can be set to different throughputs, to pulsed flow patterns with different frequencies, different relation of the duration of opening and closing phases to one another, and different opening and/or closing characteristics (e.g. B. rectangular shape, triangular shape, sawtooth shape, wave shape, etc.).
- the suction behavior of the jet pump 13 can be influenced, specifically such that in a first phase of the start-up (“initialization phase”) the fuel cell is put into operation with the supply of fuel from the fuel source, with the lack of sufficient suction behavior of the jet pump 13 recirculating the anode gas through the anode gas recirculation device 21 is suppressed throughout and does not occur, whereas in a second phase of the start-up (“consolidation phase”), which follows the first phase in terms of time, due to sufficient suction behavior of the jet pump 13 in addition to the supply of fuel from the fuel source 25, recirculation of the anode gas through the anode gas -Recirculation device 21 takes place through.
- the fuel gas flow in the mixing chamber of the jet nozzle 13 entrains anode gas, which is sucked in through the suction connection 17 and mixed with the (fresh) fuel gas is mixed into mixed gas.
- the mixed gas leaves the jet pump 13 through the pressure connection 19 and flows past the safety valve 35 and through an (optional) first condensate separator 37 before it flows through an anode chamber inlet 39 into the anode chamber 7 of the fuel cell 3 .
- control and operation-relevant status parameters of the mixed gas e.g. temperature, pressure, gas mixture ratio
- the anode gas sucked out of the anode chamber 7 through an anode chamber outlet 43 passes through a (second) condensate separator 45 serving to separate condensate water and flows past a flushing valve 47 which removes in the anode chamber accumulated foreign gases (e.g. nitrogen).
- a flushing valve 47 which removes in the anode chamber accumulated foreign gases (e.g. nitrogen).
- Condensate water separated by the second condensate separator 45 can be drained off via a condensate drain valve 49 .
- the fuel cell system according to the one shown in FIG. 2 illustrated second embodiment differs from that according to FIG. 1 only by an additional passive closure device 51 provided in the anode gas recirculation device 21 .
- This includes, as--partly schematically with regard to the proportions--in FIG. 3 , a housing 53 having an inlet 55 and an outlet 57 .
- Housed within the housing 53 is an assembly of a plurality of resilient rings 59 resembling angled disc springs in shape and an end cap 61 which - in the absence of any appreciable negative pressure acting on the outlet 57 - are held in contact with one another by a very soft spring 63 (shown on the left ) .
- the inner space 65 which is thus delimited in a sealingly closed manner by the arrangement of the rings 59 and the end cap 61 is in fluid communication with the inlet 55 , while the outer chamber 67 surrounding said arrangement on the outside is connected to the outlet 57 . If, as a result of corresponding operation of the jet pump 13 (see above), a significant negative pressure arises at the suction connection 17 of the jet pump 13, which is fluidically connected to the outlet 57 of the closure device 51, the annular gaps between the rings 59 open. A very large passage area for the recirculation gas is suddenly created, so that this can occur without any significant Flow resistance, the anode gas recirculation device 21 can flow through.
- the incipient recirculation flow exerts a suction on the end cap 61—opposing the closing force of the spring 63—so that the closure device 51 maintains its fully open passage position (shown on the right) even when the pressure conditions fluctuate within certain limits.
- Guide and stop elements assigned to the rings 59 and the cap 61 which limit the opening paths between the rings 59 among themselves, between the housing 53 and the ring adjacent to it, and between the cap 61 and the ring adjacent to it, and ensure that the ring arrangement is guided , are not shown for the sake of clarity.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020126150.0A DE102020126150A1 (de) | 2020-10-06 | 2020-10-06 | Verfahren zum nach einem Stillstand erfolgenden Hochfahren eines Brennstoffzellensystems |
| PCT/EP2021/077096 WO2022073868A1 (de) | 2020-10-06 | 2021-10-01 | Verfahren zum nach einem stillstand erfolgenden hochfahren eines brennstoffzellensystems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4226444A1 true EP4226444A1 (de) | 2023-08-16 |
Family
ID=78085648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21787345.4A Withdrawn EP4226444A1 (de) | 2020-10-06 | 2021-10-01 | Verfahren zum nach einem stillstand erfolgenden hochfahren eines brennstoffzellensystems |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20230238554A1 (de) |
| EP (1) | EP4226444A1 (de) |
| CN (1) | CN116529916A (de) |
| DE (1) | DE102020126150A1 (de) |
| WO (1) | WO2022073868A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116130707B (zh) * | 2022-12-28 | 2024-01-12 | 上海氢晨新能源科技有限公司 | 燃料电池系统的控制方法、装置和燃料电池系统 |
| DE102023132438A1 (de) * | 2023-11-21 | 2025-05-22 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren und Vorrichtung zum Darstellen eines Betriebs eines Brennstoffzellensystems in einem Fahrzeug, Fahrzeug, Computerprogrammprodukt und Speichermedium |
| DE102024205646A1 (de) * | 2024-06-19 | 2025-12-24 | Robert Bosch Gesellschaft mit beschränkter Haftung | Brennstoffzellensystem und Verfahren zum Betreiben eines Brennstoffzellensystems |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4506102B2 (ja) | 2003-05-26 | 2010-07-21 | 日産自動車株式会社 | 燃料電池システム |
| CA2597119C (en) | 2005-06-13 | 2013-04-02 | Nissan Motor Co., Ltd. | Fuel cell start-up control system |
| US9614236B2 (en) | 2006-08-10 | 2017-04-04 | GM Global Technology Operations LLC | Method for mitigating cell degradation due to startup and shutdown via cathode re-circulation combined with electrical shorting of stack |
| DE102007026004A1 (de) * | 2007-06-04 | 2008-12-11 | Daimler Ag | Brennstoffkreislauf eines Brennstoffzellensystems und Verfahren zum Betreiben desselben |
| KR101080782B1 (ko) | 2008-11-20 | 2011-11-07 | 현대자동차주식회사 | 서브 퍼지밸브를 구비한 연료전지 시스템 및 그 냉시동 방법 |
| FR2971087B1 (fr) * | 2011-02-01 | 2013-01-18 | Soc Tech Michelin | Boucle de recyclage pour pile a combustible |
| DE102011105054A1 (de) | 2011-06-21 | 2012-12-27 | Volkswagen Aktiengesellschaft | Verfahren zum Betreiben einer Brennstoffzelle sowie Brennstoffzelle |
| DE102017208544A1 (de) * | 2017-05-19 | 2018-11-22 | Bayerische Motoren Werke Aktiengesellschaft | Anodensubsystem und Verfahren zur Rezirkulation von Brennstoff |
| TWI626783B (zh) | 2017-11-10 | 2018-06-11 | 財團法人工業技術研究院 | 燃料電池用氫氣循環系統 |
| DE102018210194A1 (de) * | 2018-06-22 | 2019-12-24 | Audi Ag | Verfahren zum Starten eines Brennstoffzellensystems, Brennstoffzellensystem zur Durchführung des Verfahrens und Brennstoffzellenfahrzeug |
| DE102018218083A1 (de) | 2018-10-23 | 2020-04-23 | Audi Ag | Verfahren zum Austragen von Flüssigkeit aus einer Brennstoffzellenvorrichtung und Brennstoffzellenvorrichtung |
-
2020
- 2020-10-06 DE DE102020126150.0A patent/DE102020126150A1/de active Pending
-
2021
- 2021-10-01 CN CN202180080476.9A patent/CN116529916A/zh active Pending
- 2021-10-01 EP EP21787345.4A patent/EP4226444A1/de not_active Withdrawn
- 2021-10-01 WO PCT/EP2021/077096 patent/WO2022073868A1/de not_active Ceased
-
2023
- 2023-04-04 US US18/130,694 patent/US20230238554A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US20230238554A1 (en) | 2023-07-27 |
| WO2022073868A1 (de) | 2022-04-14 |
| DE102020126150A1 (de) | 2022-04-07 |
| CN116529916A (zh) | 2023-08-01 |
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