CN113594498B - Fuel cell system and control method thereof - Google Patents
Fuel cell system and control method thereof Download PDFInfo
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- CN113594498B CN113594498B CN202010361691.3A CN202010361691A CN113594498B CN 113594498 B CN113594498 B CN 113594498B CN 202010361691 A CN202010361691 A CN 202010361691A CN 113594498 B CN113594498 B CN 113594498B
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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
- 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
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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
- 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
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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
- 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
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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
- 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
- H01M8/04388—Pressure; Ambient pressure; Flow of anode reactants at the inlet or inside the fuel cell
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- 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
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a fuel cell system and a control method thereof, wherein the fuel cell system comprises: pile, storage tank and injection valve; the fuel is stored in the storage tank, and the storage tank is communicated with the anode of the electric pile through an ejector; the fuel tank is characterized in that the fuel tank is provided with a plurality of injection valves, one end of each injection valve is communicated with the storage tank, the other end of each injection valve is communicated with the ejector, and each injection valve is configured as a switching valve so as to control the fuel tank and the ejector to be switched between a communicated conducting state and a closed disconnecting state. Therefore, on one hand, when the fuel cell system is in any working state, the injection valve can provide working fluid with higher initial kinetic energy and higher pressure so as to meet the requirement of the fuel cell system on the fuel excess coefficient; on the other hand, the production cost of the fuel cell system can be reduced without arranging a circulating pump, parasitic power is reduced, and the energy utilization rate of the fuel cell system can be effectively improved.
Description
Technical Field
The present invention relates to the field of fuel cell technologies, and in particular, to a fuel cell system and a control method thereof.
Background
In the related art, fuel stored in a storage tank is supplied in gaseous form to anodes of a stack of fuel cells through an injection valve. In the stack the fuel reacts with the oxidant supplied to the cathode to convert chemical energy into electrical energy. The fuel remaining after the reaction is recirculated to the intake end of the anode through a circulation pump and an injector. The use of a circulation pump increases the cost and weight of the fuel cell system.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present invention is to propose a fuel cell system which is smaller in size, lower in cost, simple to control and high in energy utilization.
The invention further provides a control method of the fuel cell system.
An embodiment of a fuel cell system according to a first aspect of the present invention includes: pile, storage tank and injection valve; the fuel is stored in the storage tank, and the storage tank is communicated with the anode of the electric pile through an ejector; the fuel tank is characterized in that the fuel tank is provided with a plurality of injection valves, one end of each injection valve is communicated with the storage tank, the other end of each injection valve is communicated with the ejector, and each injection valve is configured as a switching valve so as to control the fuel tank and the ejector to be switched between a communicated conducting state and a closed disconnecting state.
According to the fuel cell system provided by the embodiment of the invention, the existing proportional valve with adjustable opening is replaced by the injection valve capable of being switched between the on state and the off state, so that the injection valve can provide working fluid with higher initial kinetic energy and higher pressure when the fuel cell system is in any working state, and the requirement of the fuel cell system on the fuel excess coefficient is met; on the other hand, the circulating pump is not required to be arranged, so that the production cost of the fuel cell system can be reduced, the weight of the fuel cell system is reduced, parasitic power is reduced, and the energy utilization rate of the fuel cell system can be effectively improved.
According to some embodiments of the invention, the fuel cell system further comprises: the inlet of the gas-liquid separator is communicated with the reflux port of the anode, the liquid outlet of the gas-liquid separator is communicated with the drain valve, and the gas outlet of the gas-liquid separator is communicated with the exhaust valve and the ejector.
Further, the fuel cell system further includes: and a first controller adapted to control an opening and closing cycle of the injection valve according to an intake pressure of the anode.
Further, the fuel cell system further includes: and a second controller adapted to control an opening and closing cycle of the injection valve according to a fuel concentration of an intake end of the anode.
Further, the first controller and the second controller comprehensively control the opening and closing cycles of the plurality of injection valves.
According to some embodiments of the invention, a plurality of the injection valves are disposed in parallel between the storage tank and the ejector.
Further, the fuel cell system further includes: the proportional electromagnetic valve is characterized in that one end of the proportional electromagnetic valve is communicated with the storage tank, the other end of the proportional electromagnetic valve is communicated with the air inlet end of the ejector, and the proportional electromagnetic valve is arranged in parallel with the injection valve.
In some embodiments, the fuel cell system further comprises: and a third controller adapted to control the opening degree of the proportional solenoid valve in accordance with the intake pressure of the anode.
A control method of a fuel cell system according to an embodiment of a second aspect of the invention, the control method including: s1: the first controller obtains a first period according to the air inlet pressure of the anode and the set pressure of the anode; s2: the second controller obtains a second period according to the opening degree of the exhaust valve; s3: and adjusting the opening and closing period of each injection valve according to the first period and the second period.
Further, the control method further includes: a1: the third controller obtains a third period according to the air inlet pressure of the anode and the set pressure of the anode; a2: the duty ratio of the proportional solenoid valve is adjusted according to the third period.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic diagram of a fuel cell system according to the present invention;
fig. 2 is another schematic diagram of a fuel cell system according to the present invention.
Reference numerals:
in the fuel cell system 100,
the stack 10, anode 11, cathode 12,
a storage tank 20, an injection valve 30, a pressure reducing valve 40,
a gas-liquid separator 50, a liquid level sensor 51, a drain valve 52, a vent valve 53,
the cooling module 60, the air module 70, the high pressure module 80,
a first controller 91, a second controller 92, a third controller 93, an ejector 94, and a proportional solenoid valve 95.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
A fuel cell system 100 and a control method thereof according to an embodiment of the present invention are described below with reference to fig. 1 to 2.
As shown in fig. 1 and 2, a fuel cell system 100 according to an embodiment of the first aspect of the invention includes: a galvanic pile 10, a storage tank 20 and an injection valve 30.
Wherein fuel is stored in the storage tank 20, and the storage tank 20 is communicated with the anode 11 of the electric pile 10 through the ejector 94; the injection valves 30 are plural, one end of the injection valve 30 communicates with the storage tank 20, the other end communicates with the ejector 94, and each injection valve 30 is configured as an on-off valve to switch between an on state in which the storage tank 20 communicates with the ejector 94 and an off state in which it is closed.
Specifically, the fuel in the storage tank 20 may be moved toward the injector 94 with a certain pressure by the injection valve 30, and thus the injector 94 supplies the fuel to the anode 11, and the fuel of the anode 11 reacts with the oxidant of the cathode 12 in the stack 10 to convert chemical energy of the fuel into electric energy.
During operation, the injector 94 is not pressurized or pushes the working fluid to move during fuel supply due to the characteristics of the injector 94 that no power is required and no moving parts are provided therein, so that the working fluid is required to move toward the anode 11 by the initial kinetic energy when being ejected from the injection valve 30, and the initial kinetic energy of the recycled fuel (i.e., the fuel in the exhaust gas after the reaction of the anode 11) is low and is difficult to enter the injector 30 when the fuel cell system 100 is operated in a low load state.
Furthermore, each injection valve 30 is provided as an on-off valve, so that the injection valve 30 can be switched between an on state and an off state, so that the pressure of the working fluid provided by the injection valve 30 is high, and the initial kinetic energy is high, so that when the fuel cell system 100 is in a low-load operation state, the fuel provided by the injection valve 30 and the recycled fuel can enter the injection valve 30, and the fuel consumption coefficient of the anode 11 can still be kept stable, so as to improve the operation stability of the fuel cell system 100 in the low-load state.
It should be noted that, in the present application, the communication between the storage tank 20 and the ejector 94 means that the working fluid may flow from the storage tank 20 to the ejector 94, and the closing between the storage tank 20 and the ejector 94 means that the storage tank 20 is not in communication with the ejector 94, and the working fluid cannot flow from the storage tank 20 to the ejector 94.
According to the fuel cell system 100 of the embodiment of the invention, the existing proportional valve with adjustable opening is replaced by the injection valve 30 capable of being switched between the on state and the off state, so that on one hand, when the fuel cell system 100 is in any working state, the injection valve 30 can provide working fluid with higher initial kinetic energy and higher pressure, and therefore, the requirement of the fuel cell system 100 on the fuel excess coefficient is met; on the other hand, without providing a circulation pump, the production cost of the fuel cell system 100 can be reduced, the weight of the fuel cell system 100 can be reduced, and the parasitic power can be reduced, thereby effectively improving the energy utilization rate of the fuel cell system 100.
In the specific embodiment shown in fig. 1 and 2, the fuel cell system 100 further includes: a pressure reducing valve 40, the pressure reducing valve 40 being provided between the reservoir 20 and the injection valve 30.
The fuel in the storage tank 20 stores high-pressure gaseous fuel, and the fuel entering the anode 11 is gaseous fuel with low pressure, so that the fuel with high pressure released in the storage tank 20 needs to be depressurized by the depressurization valve 40 and then enters the injector, so as to improve the working stability of the fuel cell system 100, and avoid damage to the injector or the injector 94 caused by the high-pressure fuel.
In some embodiments, the fuel cell system 100 further comprises: the inlet of the gas-liquid separator 50 is communicated with the reflux port of the anode 11, the liquid outlet of the gas-liquid separator 50 is communicated with the drain valve 52, and the gas outlet of the gas-liquid separator 50 is communicated with the exhaust valve 53 and the ejector 94.
Specifically, the tail gas after the reaction of the anode 11 flows into the gas-liquid separator 50 through the backflow port, a small amount of liquid water exists in the tail gas, if the liquid water enters the fuel circulation loop, the operation of the electric pile 10 and the ejector 94 is affected, the operation stability of the fuel cell system 100 is reduced, and then the liquid water in the tail gas is separated from the residual fuel in the tail gas through the gas-liquid separator 50, so that the liquid water can be prevented from entering the ejector 94 or the electric pile 10, and the operation stability of the fuel cell system 100 is improved.
Meanwhile, it can be understood that liquid water and nitrogen gas may permeate from the cathode 12 to the anode 11 during the operation of the fuel cell system 100, and thus the operation stability of the fuel cell system 100 may be further improved by periodically opening and closing the exhaust valve 53. As shown in fig. 1 and 2, a liquid level sensor 50 is provided in the gas-liquid separator 50, and the liquid level sensor 50 is adapted to control the opening of the drain valve 52 after the liquid level in the gas-liquid separator 50 exceeds a threshold value. Thus, the water level in the gas-liquid separator 50 is prevented from becoming too high, so that the gas-liquid separator 50 has a stable gas-liquid separation effect, and the operation stability of the gas-liquid separator 50 is improved.
As shown in fig. 1 and 2, the fuel cell system 100 further includes: a first controller 91 and a second controller 92, the first controller 91 being adapted to control the opening and closing cycle of the injection valve 30 according to the intake pressure of the anode 11; the second controller 91 is adapted to control the opening and closing cycles of the injection valve 53 in accordance with the fuel concentration at the intake end of the anode 11.
In this way, by providing the first controller 91, the open/close cycle of the injection valve 30 can be determined based on the difference between the preset pressure and the intake pressure at the intake end of the actual anode 11, and the second controller 92 can determine the open/close cycle of the injection valve 30 based on the fuel concentration at the intake end (related to the opening degree of the exhaust valve 53), and thus the open/close cycles of the injection valves 30 can be controlled in combination based on the first controller 91 and the second controller 92.
It should be noted that, when the exhaust valve 53 is opened, the fuel in the exhaust gas is discharged, and thus the oxygen concentration at the intake end is changed, that is, the opening of the exhaust valve 53 is related to the oxygen concentration at the intake end 53.
In one particular embodiment, a first controller 91 is disposed at the intake end of the anode 11 and a second controller 92 is disposed adjacent the exhaust valve 53. Thus, the first controller 91 can obtain the pressure at the intake end of the anode 11 and the second controller 92 can obtain the opening of the exhaust valve 53 more accurately. Meanwhile, the setting positions of the first controller 91 and the second controller 92 of the present application are not limited thereto, and are not specifically limited herein.
That is, in the embodiment shown in fig. 1, the first controller 91 determines what operation state (i.e., on state or off state) the plurality of injection valves 30 should be in at this time and how long it should be maintained in this operation state (i.e., acquire the first period) according to the intake pressure of the anode 11 and the preset pressure of the anode 11, the second controller 92 acquires the fuel concentration at the intake end of the anode 11 at this time according to the opening and the opening period of the exhaust valve 53 to determine what operation state the plurality of injection valves 30 should be in at this time and how long it should be maintained in this operation state (i.e., acquire the second period), and further determines comprehensively what operation state and how long the plurality of injection valves 30 should be maintained in each of the operation states and how long the corresponding operation states are maintained by the first period and the second period, respectively, and controls the injection valves 30 to switch to the corresponding operation states.
In the embodiment shown in fig. 2, the first controller 91 determines, according to the intake pressure of the anode 11 and the preset pressure of the anode 11, what operation state (i.e., on state or off state) the plurality of injection valves 30 should be in at this time and how long the plurality of injection valves should be maintained in this operation state (i.e., obtain the first period), and the second controller 92 obtains, according to the opening degree of the exhaust valve 53 and the opening and closing period, the fuel concentration of the intake end of the anode 11 at this time to determine what operation state the plurality of injection valves 30 should be in at this time and how long the plurality of injection valves 30 should be maintained in this operation state (i.e., obtain the second period), and further comprehensively determines, through the first period and the second period, what operation state and how long the plurality of injection valves 30 should be maintained in each other, and correspondingly controls the plurality of injection valves 30 to switch to the corresponding operation states and maintain the corresponding operation durations.
Thus, the control of the injection valve 30 is simplified and facilitated by the first controller 91 and the second controller 92, and the fuel supply amount to the fuel cell system 100 is more reasonable and stable.
As shown in fig. 1 and 2, a plurality of injection valves 30 are disposed in parallel between the storage tank 20 and the ejector 94. In this way, at least one of the plurality of injection valves 30 can be controlled to be opened according to the operating state of the fuel cell system 100 so that the injection valve 30 can supply a reasonable amount of fuel to the intake end of the anode 11, further improving the operating stability of the fuel cell system 100.
As shown in fig. 2, the fuel cell system 100 preferably further includes: the proportional solenoid valve 95, one end of the proportional solenoid valve 95 is communicated with the storage tank 20, the other end of the proportional solenoid valve 95 is communicated with the air inlet end of the ejector 94, and the proportional solenoid valve 95 is arranged in parallel with the injection valve 30. In this way, the fuel in the tank 20 can flow out through the proportional solenoid valve 95 and the plurality of injection valves 30, and the control of the fuel supply amount can be realized by controlling the duty ratio of the proportional solenoid valve 95 and the open/close state of the injection valves 30, so that the control of the fuel supply amount is more accurate and reliable, and the operation stability of the fuel cell system 100 can be improved.
In some embodiments, by providing the proportional solenoid valve 95, the plurality of injection valves 30 may be used when the fuel cell system 100 is under low load, and the proportional solenoid valve 95 may be used under high load conditions. In this way, when the fuel cell system 100 is under high load conditions, the pressure control of the proportional solenoid valve 95 is smoother by providing the required pressure by the proportional solenoid valve 95, and the operation stability of the fuel cell system 100 can be improved.
Of course, the fuel cell system 100 of the present application is not limited thereto, and in other embodiments, by providing the proportional solenoid valve 95, a plurality of injection valves 30 may be used when the fuel cell system 100 is under low load, and under high load conditions, the proportional solenoid valve 95 may be controlled to cooperate with the injection valves 30 to make the fuel supply of the fuel cell system 100 more sufficient.
Referring to fig. 1 and 2, the fuel cell system 100 further includes: the cooling module 60, the air module 70 and the high voltage module 80, the cooling module 60 is adapted to cool the stack 10, the air module 70 is in communication with the cathode 12 of the stack 10, and the high voltage module 80 is electrically connected to the stack 10 to output a voltage.
In the embodiment shown in fig. 2, the fuel cell system 100 further includes: and a third controller 93, the third controller 93 being adapted to control the opening degree of the proportional solenoid valve 95 in accordance with the intake pressure of the anode 11. In this way, the opening degree of the proportional cell valve 95 is made more reasonable, so that the accuracy of fuel supply is further improved when the injection valve 30 and the proportional cell valve 95 are engaged in fuel supply.
The first controller 91, the second controller 92, and the third controller 93 in the present application may be PID controllers based on PID logic, or may be controllers that implement the control of the injection valve 30 and the proportional solenoid valve 95 in the present application using other control logic.
The control method of the fuel cell system 100 according to the embodiment of the invention includes: s1: the first controller 91 acquires a first period from the intake pressure of the anode 11 and the set pressure of the anode 11; s2: the second controller 92 obtains a second period according to the opening degree of the exhaust valve 53; s3: the opening and closing cycle of each injection valve 30 is adjusted according to the first cycle and the second cycle.
According to the control method of the fuel cell system 100 of the embodiment of the present invention, the control of the periodicity of the injection valve 30 between the on state and the off state is achieved by the reverse control (i.e., the intake pressure of the anode 11, the position of the exhaust valve 53, etc.) of the first controller 91 and the second controller 92, so that the pressure of the anode 11 and the fuel consumption coefficient of the anode 11 can both satisfy the operation requirement of the fuel cell system 100, so as to effectively improve the operation stability of the fuel cell system 100.
It can be understood that the first controller 91 and the second controller 92 of the present embodiment can implement closed-loop feedback, so that the injection valve 30 can be quickly adjusted to a corresponding working state, the response speed of the injection valve 30 is improved, and meanwhile, the working state of the injection valve 30 is based on the data obtained by the previous test, and the closed-loop feedback control is performed after the corresponding state is obtained by looking up a table (i.e. after the open-loop table is looked up).
Further, the control method further includes: a1: the third controller 93 obtains a third period from the intake pressure of the anode 11 and the set pressure of the anode 11; a2: the duty ratio of the proportional solenoid valve 95 is adjusted according to the third period.
In this way, the proportional solenoid valve 95 is periodically controlled, and the duty ratio of the proportional solenoid valve 95 is reasonably adjusted to further improve the fuel supply of the fuel cell system 100 and improve the operation stability of the fuel cell system 100.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the description of the invention, a "first feature" or "second feature" may include one or more of such features.
In the description of the present invention, "plurality" means two or more.
In the description of the invention, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.
In the description of the invention, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. A fuel cell system (100), characterized by comprising:
a galvanic pile (10);
the fuel storage device comprises a storage tank (20), wherein fuel is stored in the storage tank (20), and the storage tank (20) is communicated with an anode (11) of the galvanic pile (10) through an ejector (94);
the injection valves (30), the injection valves (30) are a plurality, the injection valves (30) are arranged in parallel between the storage tank (20) and the ejector (94), one end of each injection valve (30) is communicated with the storage tank (20), the other end of each injection valve is communicated with the ejector (94), and each injection valve (30) is configured as a switching valve so as to control the storage tank (20) and the ejector (94) to be switched between a communicated conducting state and a closed disconnected state;
a proportional solenoid valve (95), wherein one end of the proportional solenoid valve (95) is communicated with the storage tank (20), the other end of the proportional solenoid valve (95) is communicated with the air inlet end of the ejector (94), and the proportional solenoid valve (95) is arranged in parallel with the injection valve (30);
the fuel cell system (100) controls the operation of the injection valve (30) at a low load and controls the operation of the proportional solenoid valve (95) at a high load.
2. The fuel cell system (100) according to claim 1, wherein the fuel cell system (100) further comprises: the gas-liquid separator (50), the inlet of gas-liquid separator (50) with the backward flow mouth intercommunication of positive pole (11), the liquid outlet of gas-liquid separator (50) communicates with drain valve (52), the gas outlet of gas-liquid separator (50) communicates with discharge valve (53) and ejector (94).
3. The fuel cell system (100) according to claim 2, wherein the fuel cell system (100) further comprises: -a first controller (91), said first controller (91) being adapted to control the opening and closing cycle of said injection valve (30) depending on the intake pressure of the anode (11).
4. The fuel cell system (100) according to claim 3, wherein the fuel cell system (100) further comprises: and a second controller (92), wherein the second controller (92) is adapted to control the open/close cycle of the injection valve (30) according to the fuel concentration at the air inlet end of the anode (11).
5. The fuel cell system (100) according to claim 4, wherein the first controller (91) and the second controller (92) comprehensively control the opening and closing cycles of the plurality of injection valves (30).
6. The fuel cell system (100) according to claim 1, further comprising: and a third controller (93), the third controller (93) being adapted to control the opening degree of the proportional solenoid valve (95) in accordance with the intake pressure of the anode (11).
7. A control method of a fuel cell system (100), characterized in that the fuel cell system (100) is the fuel cell system (100) according to any one of claims 1 to 6;
the control method comprises the following steps:
s1: the first controller (91) acquires a first period according to the inlet pressure of the anode (11) and the set pressure of the anode (11);
s2: a second controller (92) acquires a second period according to the opening degree of the exhaust valve (53);
s3: the opening and closing cycle of each injection valve (30) is adjusted according to the first cycle and the second cycle.
8. The control method of the fuel cell system (100) according to claim 7, characterized in that the control method further comprises:
a1: a third controller (93) acquires a third period according to the intake pressure of the anode (11) and the set pressure of the anode (11);
a2: the duty ratio of the proportional solenoid valve (95) is adjusted according to the third period.
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| CN202010361691.3A CN113594498B (en) | 2020-04-30 | 2020-04-30 | Fuel cell system and control method thereof |
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| CN202010361691.3A CN113594498B (en) | 2020-04-30 | 2020-04-30 | Fuel cell system and control method thereof |
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| CN113594498B true CN113594498B (en) | 2023-07-21 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003178779A (en) * | 2001-12-12 | 2003-06-27 | Nissan Motor Co Ltd | Fuel circulation equipment of fuel cell system |
| CN110247080A (en) * | 2019-07-18 | 2019-09-17 | 中山大洋电机股份有限公司 | A kind of hydrogen gas circulating system of fuel cell power system |
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| CN210040408U (en) * | 2019-07-18 | 2020-02-07 | 中山大洋电机股份有限公司 | Hydrogen circulation system of fuel cell power system |
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| CN111063916B (en) * | 2019-12-27 | 2020-08-11 | 电子科技大学 | Fuel cell anode water management system and control method |
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