WO2023066628A1 - Module de pompe à jet pour système de pile à combustible - Google Patents

Module de pompe à jet pour système de pile à combustible Download PDF

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Publication number
WO2023066628A1
WO2023066628A1 PCT/EP2022/076986 EP2022076986W WO2023066628A1 WO 2023066628 A1 WO2023066628 A1 WO 2023066628A1 EP 2022076986 W EP2022076986 W EP 2022076986W WO 2023066628 A1 WO2023066628 A1 WO 2023066628A1
Authority
WO
WIPO (PCT)
Prior art keywords
jet pump
pump module
piston
nozzle
anode gas
Prior art date
Application number
PCT/EP2022/076986
Other languages
German (de)
English (en)
Inventor
Michael Kurz
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to CN202280070485.4A priority Critical patent/CN118215791A/zh
Publication of WO2023066628A1 publication Critical patent/WO2023066628A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
    • F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/46—Arrangements of nozzles
    • F04F5/461—Adjustable nozzles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/46—Arrangements of nozzles
    • F04F5/463—Arrangements of nozzles with provisions for mixing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/46—Arrangements of nozzles
    • F04F5/466—Arrangements of nozzles with a plurality of nozzles arranged in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/54—Installations characterised by use of jet pumps, e.g. combinations of two or more jet pumps of different type
    • 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

Definitions

  • the invention relates to a jet pump module for recirculating anode gas in an anode circuit of a fuel cell system. Furthermore, a fuel cell system with a jet pump module according to the invention is proposed.
  • Hydrogen-based fuel cells require hydrogen and oxygen to convert them into electrical energy, heat and water.
  • the hydrogen is supplied to an anode via an anode circuit.
  • the air which serves as the oxygen supplier, reaches a cathode via an air system.
  • the two gas spaces within a fuel cell are each separated from one another by an electrolyte membrane that is permeable to protons.
  • a mobile fuel cell system is usually operated with an excess of hydrogen (lambda > 1).
  • the excess hydrogen is recirculated via a recirculation path of the anode circuit and fed back to the fuel cells.
  • the recirculation can be effected actively and/or passively, a recirculation pump being used for active recirculation and a jet pump with a propulsion nozzle being used for passive recirculation. Since a single jet pump can only inadequately cover the entire load range of a fuel cell system, concepts are known from the prior art that use two jet pumps or propulsion nozzles connected in parallel.
  • the inactive jet pump or motive nozzle In order to be able to operate these independently of one another depending on the load, the inactive jet pump or motive nozzle must be encapsulated, otherwise no anode gas is recirculated.
  • the known concepts therefore provide a control valve, by means of which the flow path over the respective inactive jet pump can be disconnected.
  • the control valve causes additional costs, so that the costs of the entire system increase.
  • an additional hydrogen metering valve may also be required in order to free the fuel cell system of water residues by flushing with pure hydrogen in the event of a shutdown. This further increases the costs. In addition, the space requirement increases.
  • the present invention is therefore concerned with the task of specifying a more cost-effective and at the same time more space-saving solution for the operation of two jet pumps or driving nozzles for the passive recirculation of anode gas in an anode circuit of a fuel cell system.
  • the jet pump module proposed for the recirculation of anode gas in an anode circuit of a fuel cell system comprises a first driving nozzle and a second driving nozzle arranged parallel to the first driving nozzle.
  • Each propulsion nozzle is assigned an actively controllable hydrogen metering valve, so that the propulsion nozzles can be activated independently of one another.
  • the jet pump module also includes a first mixing tube, into which the first propulsion nozzle opens, and a second mixing tube, which is arranged parallel to the first mixing tube and into which the second propulsion nozzle opens, with each mixing tube being preceded by an antechamber which, depending on the position, has a reciprocating Piston of a pressure-controlled valve can be connected to a common inlet area for recirculated anode gas.
  • the pressure applied to the piston can be used to move it into at least two positions, into a first position in which the first antechamber is connected to the common inlet area and the second antechamber is connected to the inlet Is let area decoupled, and in a second position in which the second anteroom is connected to the common inlet area and the first antechamber is decoupled from the inlet area.
  • the movements of the piston are controlled via the pressure applied to the piston, i.e. passively.
  • the pressure prevailing in the first antechamber is preferably applied to the piston on the one hand and the pressure prevailing in the second antechamber on the other hand. If a hydrogen dosing valve is now opened to activate a propulsion nozzle, the pressure in the respective antechamber drops so that a pneumatic force that moves the piston is generated via the pressure difference. In this way, the respective inactive propulsion nozzle is decoupled from the common inlet area. An additional control valve for controlling the two propulsion nozzles is therefore not necessary. This means that the costs for an actively switchable control valve are saved and the overall costs are reduced.
  • Another advantage results from the arrangement of the pressure-controlled valve on the inlet side. Because in this arrangement the flow resistance of the recirculated anode gas deteriorates only insignificantly. As a result, high efficiency can be achieved.
  • the two mixing tubes are connected on the outlet side via a common outlet area. Since the antechamber of the respective inactive propulsion nozzle can be decoupled from the common inlet area with the aid of the pressure-controlled valve, there is no risk of anode gas being circulated through the jet pump module, despite the connection via the common outlet area. This is because the flow path through the respective inactive propulsion nozzle is blocked.
  • the propulsion nozzles and/or the mixing tubes are designed for system loads of different magnitudes. In this way, a wide range of loads can be covered by either the low load motive nozzle or the high load motive nozzle is activated.
  • the piston of the pressure-controlled valve which can be moved back and forth, is prestressed in the direction of at least one end position by the spring force of at least one spring.
  • the spring force causes an additional force acting on the piston, preferably compressive force, which can be designed such that when a hydrogen metering valve opens, the pressure increasing in the respective antechamber is not sufficient to move the piston from a position in which both antechambers are separated from the common inlet area are decoupled.
  • the piston is preferably biased in opposite directions with the aid of at least two springs.
  • the piston is then essentially balanced in terms of pressure or force, so that it can assume a type of central position in which both antechambers are decoupled from the common inlet area.
  • both hydrogen metering valves can be opened selectively or together.
  • At least one end position of the piston which can be moved back and forth, is preferably predetermined by a stop surface on the housing side.
  • the abutment surface on the housing side is preferably ring-shaped and/or has a connecting channel passing through it, which opens into an antechamber. This ensures that the pressure prevailing in the antechamber is applied to the piston, even when the piston is in contact with the stop surface.
  • the stop surface on the housing side preferably interacts with a stop surface formed on the end face of the piston. At the same time, this serves as an effective surface on which the pressure prevailing in the respective antechamber is applied to control the movements of the piston.
  • Both end positions of the piston are preferably specified by a stop surface on the housing side. Furthermore, each stop surface preferably interacts with a stop surface formed on the end face of the piston.
  • the piston can then be moved back and forth between the two end positions to open and/or block the flow paths that connect the common inlet area with the antechambers, and preferably assume a middle position between the two end positions.
  • an end position be formed by a movable stop sleeve that is spring-loaded in the direction of the piston.
  • the end position is variable, depending in particular on the pressures in the two antechambers.
  • the piston preferably has a longitudinal axis which is aligned perpendicular to the longitudinal axes of the propulsion nozzles.
  • This alignment of the piston of the pressure-controlled valve is particularly space-saving.
  • the piston can be arranged between the two vestibules with a corresponding alignment, so that the pressure prevailing in the respective vestibule is present on both sides of the piston.
  • the piston of the pressure-controlled valve preferably assumes a middle position when the hydrogen metering valves are closed, in which both antechambers are decoupled from the common inlet area for recirculated anode gas.
  • fresh hydrogen can be metered in by opening at least one hydrogen metering valve, without anode gas being recirculated at the same time. This is particularly important in the event of part in order to remove water residues with the help of the dosed fresh hydrogen.
  • a jet pump module according to the invention Since the preferred area of application of a jet pump module according to the invention is a fuel cell system, a fuel cell system with an anode circuit is also proposed, in which a jet pump module according to the invention is integrated. With the help of this module, costs and installation space can be saved. Furthermore, a high level of efficiency can be achieved in the passive recirculation of anode gas, since the flow resistance of the recirculated anode gas is only slightly worsened by the proposed configuration of the jet pump module.
  • FIG. 1 shows a schematic longitudinal section through a first jet pump module according to the invention, a) with an active first motive nozzle with an inactive second motive nozzle and b) with an active second motive nozzle with an inactive first motive nozzle,
  • Fig. 2 shows a schematic longitudinal section through a second jet pump module according to the invention, a) with inactive first and second driving nozzle, b) with active second driving nozzle with inactive first driving nozzle, c) with active first driving nozzle with inactive second driving nozzle, d) with active first driving nozzle simultaneous decoupling from the inlet area and e) with active first and second propulsion nozzle with simultaneous decoupling from the inlet area, and
  • FIG 3 shows a schematic longitudinal section through a third jet pump module according to the invention, a) with activated second drive nozzle for recirculation of anode gas and b) with activated second drive nozzle with simultaneous decoupling from the inlet area.
  • the jet pump module 1 shown in FIGS. 1a) and 1b) is used for the passive recirculation of anode gas in an anode circuit of a fuel cell system in which the jet pump module 1 is integrated.
  • the jet pump For this purpose, module 1 comprises a first propulsion nozzle 2 and a second propulsion nozzle 3, which are arranged in parallel.
  • the two propulsion nozzles 2, 3 are each assigned a hydrogen metering valve 4, 5 and a mixing tube 6, 7. Based on the design of the mixing tubes 6, 7, it can be seen that they are designed in conjunction with the respective propulsion nozzle 2, 3 for system loads of different magnitudes.
  • the motive nozzle 2 with the mixing tube 6 is designed for higher loads, while the motive nozzle 3 with the mixing tube 7 is designed for lower loads.
  • the driving nozzles 2, 3 can be activated separately from one another via the hydrogen metering valves 4, 5, so that the amount of recirculated anode gas can be controlled as a function of the load.
  • the mixing tubes 6 , 7 are connected on the outlet side via a common outlet area 13 of the jet pump module 1 .
  • the mixing tubes 6 , 7 are each preceded by an antechamber 8 , 9 which can be coupled or decoupled to a common inlet area 12 depending on the position of a reciprocating piston 11 of a pressure-controlled valve 10 .
  • Recirculated anode gas can be fed to the jet pump module 1 via the common inlet area 12 . If an antechamber 8, 9 is decoupled from the inlet area 12, no recirculated anode gas gets into it.
  • the inlet area 12 is then only connected to the outlet area 13 via the anteroom 8, 9, which is not decoupled in each case, while the other flow path is blocked. This ensures that no recirculated anode gas is circulated within the jet pump module 1 .
  • the first propulsion nozzle 2 is activated and the second propulsion nozzle 3 is deactivated.
  • the first propulsion nozzle 2 is activated via the associated hydrogen metering valve 4 . This is opened so that fresh hydrogen is taken from a tank 21 and fed to the propulsion nozzle 2 .
  • the pressure is previously set to medium pressure with the aid of a pressure regulator 22 .
  • the fluid jet generated by the driving nozzle 2 causes a negative pressure pi in the antechamber 8 that is smaller than a pressure P2 in the antechamber 9 . Since the pressures p1, p2 prevailing in the two vestibules 8, 9 are applied to the piston 11, the pressure difference causes a pneumatic force which moves the piston 11 in the direction of a first stop surface 16 on the housing side.
  • the antechamber 8 is connected to the inlet area 12 so that recirculated anode gas is sucked into the mixing tube 6 . Due to the design of the driving nozzle 2 and of the mixing tube 6 for high loads, a comparatively large amount of recirculated anode gas is supplied to the outlet section 13 .
  • the deactivation of one propulsion nozzle 2, 3 of the jet pump module 1 of FIG. 1 ensures that no anode gas is pumped within the jet pump module 1 in a circuit. Furthermore, by switching between the driving nozzles 2, 3, the amount of recirculated anode gas can be varied depending on the load.
  • FIG. 1 A further preferred embodiment of a jet pump module 1 according to the invention is shown in FIG. This differs from that of FIG. 1 in particular in that springs 14, 15 are provided, the spring forces of which pretension the piston 11 in the direction of a first and a second end position. Via the spring forces of the springs 14, 15, the piston 11 can be held in a central position in which both vestibules 8, 9 are decoupled from the common inlet area 12 (see FIG. 2a)). The correct length adjustment of the two springs 14, 15 is responsible for the middle position of the piston 11.
  • the hydrogen metering valve 5 is open to activate the driving nozzle 3. This creates a negative pressure ps in the antechamber 9, which pulls the piston 11 against the spring force F2 of the spring 15 against the stop surface 17. The softer the spring 15 is designed, the less vacuum is required to pull the piston 11 up to the stop surface 17 . In this position, a connection between the vestibule 9 and the inlet region 12 is established, while the vestibule 8 remains uncoupled from the inlet region 12—despite the changed position of the piston 11.
  • Figure 2c) shows the opposite case.
  • the hydrogen metering valve 4 is open, so that there is a negative pressure ps in the antechamber 8, which pulls the piston 11—against the spring force Fi of the spring 14—to the stop surface 16 on the housing side.
  • the vestibule 8 is connected to the inlet region 12 , while the vestibule 9 remains decoupled from the inlet region 12 .
  • FIGS. 2d) and 2e Further functions are described below with reference to FIGS. 2d) and 2e), which can be implemented with the aid of the jet pump module 1 of FIG. This is because the central position of the piston 11 makes it possible, if required, to meter in fresh or dry hydrogen from the tank 21 without admixing recirculated and therefore moist anode gas.
  • the pressure in the antechamber 8 hardly changes. This means that in the antechamber 8 there is a negative pressure p? sets, which is not sufficient to move the piston 11 against the spring force of the spring 14 from its central position.
  • the antechamber 8 remains decoupled even when the piston 11 moves (see FIG. 2d)). Only when a larger quantity of hydrogen is metered in from the tank 21 via the hydrogen metering valve 4 does the pressure p? in the vestibule 8 significantly, so that the piston 11 is pulled against the stop surface 16 on the housing side. In this position, the antechamber 8 is connected to the inlet area 12 so that anode gas is recirculated and mixed with the fresh hydrogen from the tank 21 .
  • the hydrogen metering valve 4 is operated below the design limit of the driving nozzle 2, small amounts of hydrogen can thus be metered in from the tank 21 without the admixture of recirculated (moist) anode gas. As shown by way of example in FIG. 2e), this also applies to the hydrogen metering valve 5. If this—at the same time as the hydrogen metering valve 4—is operated below a design limit for the propulsion nozzle 3, the forces acting on the piston 11 are comparatively small or cancel each other out. Can for rinsing thus fresh (dry) hydrogen can be removed from the tank 21 via both hydrogen metering valves 4, 5 without recirculated (moist) anode gas being admixed.
  • FIG. 14 A further preferred embodiment of a jet pump module 1 according to the invention can be seen in FIG.
  • only one spring 15 is provided, by means of which a stop sleeve 20 is pretensioned against a stop surface 23 on the housing side.
  • a stop surface 19 of the piston 11 comes into contact with the stop sleeve 20.
  • the piston 11 has a stop surface 18 which interacts with a stop surface 16 on the housing side.
  • the stop sleeve 20 is arranged on the side of the piston 11 which faces the driving nozzle 3 for smaller system loads. If only so much hydrogen is metered in with the hydrogen metering valve 5 that the driving nozzle 3 is still operated below the upper design limit, a negative pressure ps occurs in the antechamber 9, which causes a pneumatic force that pulls the piston 11 up to the stop sleeve 20. In this position, the anteroom 9 is connected to the inlet area 12 . Since the spring force F3 of the spring 15 is greater than the pneumatic counterforce acting on the piston 11, the stop sleeve 20 remains on the stop surface 23 on the housing side (see FIG. 3a)).
  • the pressure in the antechamber 9 drops to a negative pressure pg, which is significantly lower than the negative pressure ps.
  • a pneumatic force F p acts on the piston 11 which is greater than the spring force F3 of the spring 15, so that the piston 11 and the stop sleeve 20 move in the direction of the stop surface 17 on the housing side.
  • the antechamber 9 is decoupled from the inlet area 12, so that the outlet area 13 can be supplied with fresh (dry) hydrogen from the tank 21 without the admixture of recirculated (moist) anode gas (see FIG. 3b)).
  • FIGS. 1 to 3 have in common that the longitudinal axis A3 of the piston 11 of the pressure-controlled valve 10 is aligned perpendicular to the longitudinal axes Ai, A2 of the two driving nozzles 2, 3. This enables a compact arrangement of the valve 10, which therefore requires little installation space.

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

Abstract

L'invention concerne un module de pompe à jet (1) destiné à remettre en circulation un gaz anodique dans un circuit d'anode d'un système de pile à combustible, comprenant une première buse de propulsion (2) et une seconde buse de propulsion (3) qui est agencée parallèlement à la première buse de propulsion (2). Chaque buse de propulsion (2, 3) est associée à une soupape de dosage d'hydrogène à actionnement actif (4, 5) de sorte que les buses de propulsion (2, 3) peuvent être activées indépendamment l'une de l'autre. Le module de pompe à jet comprend en outre un premier tube de mélange (6), dans lequel la première buse de propulsion (2) s'ouvre, et un second tube de mélange (7) qui est agencé parallèlement au premier tube de mélange (6) et dans lequel la seconde buse de propulsion (3) s'ouvre, chaque tube de mélange (6, 7) étant agencé en aval d'une antichambre (8, 9) qui peut être reliée à une zone d'entrée commune (12) pour un gaz anodique remis en circulation sur la base de la position d'un piston (11), qui peut être animé d'un mouvement de va-et-vient, d'une soupape commandée par pression (10). L'invention se rapporte également à un système de pile à combustible comprenant un tel module de pompe à jet (1).
PCT/EP2022/076986 2021-10-20 2022-09-28 Module de pompe à jet pour système de pile à combustible WO2023066628A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202280070485.4A CN118215791A (zh) 2021-10-20 2022-09-28 用于燃料电池系统的射流泵模块

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021211824.0 2021-10-20
DE102021211824.0A DE102021211824A1 (de) 2021-10-20 2021-10-20 Strahlpumpenmodul für ein Brennstoffzellensystem, Brennstoffzellensystem

Publications (1)

Publication Number Publication Date
WO2023066628A1 true WO2023066628A1 (fr) 2023-04-27

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PCT/EP2022/076986 WO2023066628A1 (fr) 2021-10-20 2022-09-28 Module de pompe à jet pour système de pile à combustible

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DE (1) DE102021211824A1 (fr)
WO (1) WO2023066628A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020022171A1 (en) * 2000-08-10 2002-02-21 Honda Giken Kogyo Kabushiki Kaisha Fuel supply device for fuel cell
US20050064255A1 (en) * 2003-09-18 2005-03-24 Ballard Power Systems Inc. Fuel cell system with fluid stream recirculation
US20210226237A1 (en) * 2020-01-22 2021-07-22 Toyota Jidosha Kabushiki Kaisha Fuel cell system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020022171A1 (en) * 2000-08-10 2002-02-21 Honda Giken Kogyo Kabushiki Kaisha Fuel supply device for fuel cell
US20050064255A1 (en) * 2003-09-18 2005-03-24 Ballard Power Systems Inc. Fuel cell system with fluid stream recirculation
US20210226237A1 (en) * 2020-01-22 2021-07-22 Toyota Jidosha Kabushiki Kaisha Fuel cell system

Also Published As

Publication number Publication date
CN118215791A (zh) 2024-06-18
DE102021211824A1 (de) 2023-04-20

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