CN115241496B - Gas-water separation system of fuel cell, control method and fuel cell system - Google Patents
Gas-water separation system of fuel cell, control method and fuel cell system Download PDFInfo
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- CN115241496B CN115241496B CN202211154813.7A CN202211154813A CN115241496B CN 115241496 B CN115241496 B CN 115241496B CN 202211154813 A CN202211154813 A CN 202211154813A CN 115241496 B CN115241496 B CN 115241496B
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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
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04156—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal
- H01M8/04164—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal by condensers, gas-liquid separators or filters
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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
- H01M8/04097—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with recycling of the 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
- H01M8/04298—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
- H01M8/04492—Humidity; Ambient humidity; Water content
- H01M8/045—Humidity; Ambient humidity; Water content of anode reactants at the inlet or inside the fuel cell
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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
- H01M8/04694—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
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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
Abstract
The invention provides a gas-water separation system of a fuel cell, a control method and a fuel cell system, relating to the field of fuel cell control, wherein the gas-water separation system of the fuel cell is connected with a fuel cell stack and comprises the following components: a first air passage, a second air passage, and a gas-liquid separation passage; wherein, the first air passage includes: the system comprises an air inlet system, an air compressor, an intercooler, a humidifier and a back pressure valve; the second air passage includes: a flow control valve, a gas-liquid separator and a hydrogen discharge valve; the gas-liquid separation passage includes: a hydrogen circulation system and a gas-liquid separator; the gas-water separation system of the fuel cell can utilize the first impeller arranged in the second air passage to drive the second impeller in the gas-liquid separator, so that the exhaust energy in the first passage can be utilized to the gas-liquid separator, additional power is provided for gas-liquid separation in the gas-liquid separator, and the working efficiency of the gas-liquid separation passage is improved.
Description
Technical Field
The invention relates to the field of fuel cell control, in particular to a gas-water separation system of a fuel cell, a control method and a fuel cell system.
Background
The gas-liquid separator of the present fuel cell system is mainly divided into baffle type, cyclone centrifugal type and silk screen type according to the principle. The baffle type volume is small, the baffle type flow meter can adapt to large flow change, and the problem of narrow separation load range exists; the cyclone centrifugal type has the problems of large volume and high requirement on the flow speed; the wire mesh type has the problems of easy blockage, high requirements on mesh number and material selection of the wire mesh type and narrow separation load. The three existing schemes all have the problem of narrow gas-liquid separation load, and the wet hydrogen can not be effectively and controllably separated from the gas-liquid according to the actual operation working condition of the galvanic pile.
In summary, the gas-liquid separator in the prior art has a problem of low performance efficiency in the fuel cell system.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a gas-water separation system of a fuel cell, a control method and a fuel cell system, in which a first impeller disposed in a second air passage can be used to drive a second impeller in a gas-liquid separator, so that exhaust energy in the first passage can be utilized to the gas-liquid separator, and extra power is provided for gas-liquid separation in the gas-liquid separator, thereby improving the operating efficiency of the gas-liquid separation passage.
In a first aspect, an embodiment of the present invention provides a gas-water separation system for a fuel cell, where the gas-water separation system for the fuel cell is connected to a fuel cell stack, and the gas-water separation system includes: a first air passage, a second air passage, and a gas-liquid separation passage;
wherein, the first air passage includes: the system comprises an air inlet system, an air compressor, an intercooler, a humidifier and a back pressure valve; the air inlet end of the air inlet system is used for inputting atmosphere, and the air outlet end of the air inlet system is connected with the inlet of the intercooler through the air compressor; the air outlet of the intercooler is connected with the first air inlet of the fuel cell stack through the dry side passage of the humidifier; the first air outlet of the fuel cell stack is connected with a back pressure valve through a wet side passage of the humidifier;
the second air passage includes: a flow control valve and a first impeller; the first air outlet of the fuel cell stack is connected with the air inlet of the flow control valve through a wet side passage of the humidifier; the first impeller is arranged at an air outlet of the flow control valve;
the gas-liquid separation passage includes: a hydrogen discharge valve, a hydrogen circulation system and a gas-liquid separator; the gas-liquid separator is internally provided with a second impeller, the second impeller is used for carrying out gas-liquid separation on a second gas outlet of the fuel cell stack, and the first impeller and the second impeller are in coaxial transmission; the first gas outlet of the gas-liquid separator is connected with a hydrogen discharge valve; the second gas outlet of the gas-liquid separator is connected with the gas inlet of the hydrogen circulation system; and the gas outlet of the hydrogen circulating system and a preset hydrogen supply device are respectively connected with the second gas inlet of the fuel cell stack.
In some embodiments, the gas-liquid separation passage further includes: a first humidity sensor; the first humidity sensor is arranged at the first air outlet of the gas-liquid separator and used for acquiring the humidity value of the hydrogen side outlet corresponding to the first air outlet of the gas-liquid separator.
In some embodiments, the gas-liquid separation passage further includes: a second humidity sensor; the second humidity sensor is arranged at a second air inlet of the fuel cell stack and used for acquiring a humidity value of a hydrogen inlet corresponding to the second air inlet of the fuel cell stack.
In some embodiments, the gas-water separation system of the fuel cell further comprises a third humidity sensor; the third humidity sensor is arranged in a humidity calculation unit of the fuel cell stack; the humidity calculating unit is used for acquiring a humidity parameter of the fuel cell stack.
In some embodiments, the humidity calculation unit further comprises: a voltage calculation unit; and the voltage calculating unit is used for calculating and obtaining the humidity parameter of the fuel cell stack according to the voltage parameter of the single cell in the fuel cell stack.
In some embodiments, the humidity calculation unit further comprises: an impedance calculation unit; and the impedance calculation unit is used for calculating the humidity parameter of the fuel cell stack according to the impedance value in the fuel cell stack.
In some embodiments, the second air passage further comprises: a first air dryer; the first air dryer is arranged at the first air inlet of the gas-liquid separator and used for drying air entering the gas-liquid separator.
In some embodiments, the gas-liquid separation passage further comprises: a second air dryer; the second air dryer is arranged at the air inlet of the hydrogen circulation system and is used for drying the air entering the hydrogen circulation system.
In a second aspect, an embodiment of the present invention provides a control method for a gas-water separation system of a fuel cell, where the method is applied to the gas-water separation system of the fuel cell mentioned in the first aspect;
the method comprises the following steps:
when the first air passage is in a working state, determining the opening value of the flow control valve according to the state parameters of the fuel cell stack;
controlling the flow of gas in the second air passageway in accordance with the determined opening value of the flow control valve;
and adjusting the gas-liquid separation efficiency of the gas-liquid separation passage in real time by using the gas flow in the second air passage.
In a third aspect, embodiments of the present invention provide a fuel cell system, which includes a fuel cell stack and a gas-water separation system of the fuel cell as mentioned in the first aspect; wherein the gas-water separation system of the fuel cell performs the control method of the gas-water separation system of the fuel cell mentioned in the second aspect when performing the gas-water separation.
In a fourth aspect, an embodiment of the present invention provides an electronic device, where the electronic device includes: a processor and a storage device; the storage means has stored thereon a computer program which, when executed by the processor, performs the steps of the method of controlling the gas-water separation system of a fuel cell as provided in the second aspect.
In a fifth aspect, the embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored, and the computer program is executed by a processor to implement the steps of the control method for a gas-water separation system of a fuel cell provided in the second aspect.
The embodiment of the invention has the following beneficial effects:
the invention provides a gas-water separation system of a fuel cell, a control method and a fuel cell system, wherein the gas-water separation system of the fuel cell is connected with a fuel cell stack, and the gas-water separation system of the fuel cell system comprises: a first air passage, a second air passage, and a gas-liquid separation passage; wherein, the first air passage includes: the system comprises an air inlet system, an air compressor, an intercooler, a humidifier and a back pressure valve; the air inlet end of the air inlet system is used for inputting atmosphere, and the air outlet end of the air inlet system is connected with the inlet of the intercooler through the air compressor; the air outlet of the intercooler is connected with the first air inlet of the fuel cell stack through the dry side passage of the humidifier; the first air outlet of the fuel cell stack is connected with a back pressure valve through a wet side passage of the humidifier; the second air passage includes: a flow control valve and a first impeller; the first air outlet of the fuel cell stack is connected with the air inlet of the flow control valve through a wet side passage of the humidifier; the first impeller is arranged at an air outlet of the flow control valve; the liquid separation path includes: a hydrogen discharge valve, a hydrogen circulation system and a gas-liquid separator; the gas-liquid separator is internally provided with a second impeller, the second impeller is used for carrying out gas-liquid separation on a second gas outlet of the fuel cell stack, and the first impeller and the second impeller are in coaxial transmission; the first gas outlet of the gas-liquid separator is connected with a hydrogen discharge valve; the second gas outlet of the gas-liquid separator is connected with the gas inlet of the hydrogen circulation system; and the gas outlet of the hydrogen circulating system and a preset hydrogen supply device are respectively connected with the second gas inlet of the fuel cell stack. In the process of gas-water separation by using the gas-water separation of the fuel cell, when the first air passage is in a working state, determining the opening value of the flow control valve according to the state parameters of the fuel cell stack; then controlling the gas flow in the second air passage according to the determined opening value of the flow control valve; and finally, adjusting the gas-liquid separation efficiency of the gas-liquid separation passage in real time by using the gas flow in the second air passage. The gas-water separation system of the fuel cell drives the second impeller in the gas-liquid separator by utilizing the first impeller arranged in the second air passage, realizes the utilization of the exhaust energy in the first passage to the gas-liquid separator, provides extra power for the gas-liquid separation in the gas-liquid separator, and further improves the working efficiency of the gas-liquid separation passage.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention as set forth above.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a gas-water separation system of a fuel cell according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a gas-water separation system of another fuel cell according to an embodiment of the present invention;
FIG. 3 is a flowchart of a control method of a gas-water separation system of a fuel cell according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a fuel cell system according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
An icon:
100-a first air passageway; 200-a second air passage; 300-gas-liquid separation path; 400-gas-water separation system of fuel cell;
1-an air intake system; 2, an air compressor; 3, an intercooler; 4-a humidifier; 5-a fuel cell stack; 6-back pressure valve; 7-a flow control valve; 8-a gas-liquid separator; 9-a hydrogen circulation system; 10-a hydrogen supply device; 11-a hydrogen discharge valve; 12-a first humidity sensor; 13-a second humidity sensor; 14-a third humidity sensor; 15-a voltage calculation unit; 16-an impedance calculation unit; 17-a first air dryer; 18-a second air dryer; 19-a first impeller; 20-a second impeller;
501, a processor; 502-a memory; 503-bus; 504-communication interface.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
At present, the gas-liquid separator of the fuel cell system is mainly divided into baffle type, cyclone centrifugal type and silk screen type according to the principle. The baffle type volume is small, the baffle type flow meter can adapt to large flow change, and the problem of narrow separation load range exists; the cyclone centrifugal type has the problems of large volume and high requirement on flow speed; the wire mesh type has the problems of easy blockage, high requirements on mesh number and material selection of the wire mesh type and narrow separation load. All there is the narrow problem of gas-liquid separation load in three kinds of current schemes above, and can't carry out effectively controllable gas-liquid separation to wet hydrogen according to the actual operating condition of galvanic pile.
In summary, the gas-liquid separator in the prior art has a problem of low performance efficiency in the fuel cell system. Based on this, embodiments of the present invention provide a gas-water separation system for a fuel cell, a control method, and a fuel cell system, where the gas-water separation system for a fuel cell utilizes a first impeller disposed in a second air passage to drive a second impeller in a gas-liquid separator, so as to implement utilization of exhaust energy in the first passage into the gas-liquid separator, and provide additional power for gas-liquid separation in the gas-liquid separator, thereby improving the operating efficiency of the gas-liquid separation passage.
For the understanding of the present embodiment, a gas-water separation system of a fuel cell disclosed in the embodiment of the present invention will be described in detail first.
Referring to fig. 1, a gas-water separation system of a fuel cell, which is connected to a fuel cell stack 5, includes: a first air passage 100, a second air passage 200, and a gas-liquid separation passage 300.
The first air passage 100 includes: the system comprises an air inlet system 1, an air compressor 2, an intercooler 3, a humidifier 4 and a backpressure valve 6; the air inlet end of the air inlet system 1 is used for inputting atmosphere, and the air outlet end of the air inlet system 1 is connected with the inlet of the intercooler 3 through the air compressor 2; the air outlet of the intercooler 3 is connected with the first air inlet of the fuel cell stack 5 through the dry side passage of the humidifier 4; the first outlet port of the fuel cell stack 5 is connected to a back pressure valve 6 through a wet-side passage of the humidifier 4.
The second air passage 200 includes: the flow control valve 7 and the first impeller 19; a first air outlet of the fuel cell stack 5 is connected with an air inlet of a flow control valve 7 through a wet side passage of the humidifier 4; a first impeller 19 is provided at the air outlet of the flow control valve 7.
The gas-liquid separation passage 300 includes: a hydrogen discharge valve 11, a hydrogen circulation system 9, and a gas-liquid separator 8; the gas-liquid separator 8 is provided with a second impeller 20, and the second impeller 20 is used for gas-liquid separation of the second gas outlet of the fuel cell stack 5. The first impeller 19 and the second impeller 20 are in coaxial transmission; a first gas outlet of the gas-liquid separator 8 is connected with a hydrogen discharge valve 11; the second outlet of the gas-liquid separator 8 is connected with the inlet of the hydrogen circulation system 9; the outlet of the hydrogen circulation system 9 and a preset hydrogen supply device 10 are respectively connected with the second inlet of the fuel cell stack.
Specifically, air in a first air passage 100 of the gas-water separation system of the fuel cell firstly enters an air inlet system 1, then enters an intercooler 3 through power provided by an air compressor 2, enters a fuel cell stack 5 through a first air inlet after passing through a dry-side passage of a humidifier 4, is discharged from a first air outlet after passing through an internal passage of the fuel cell stack 5, and is discharged through a wet-side passage of the humidifier 4 through a back pressure valve 6. The gas in the wet side passage of the humidifier 4 is also delivered into the second air passage 200, passes through the flow control valve 7 and blows the first impeller 19. The gas generated at the second gas outlet of the fuel cell stack 5 enters the gas-liquid separator 8 and then is subjected to gas-liquid separation, the gas-liquid separation process is realized through the built-in second impeller 20, and the first impeller 19 and the second impeller 20 are coaxially arranged, so that the rotation effect of the second impeller 20 is improved under the driving of the first impeller 19, and the gas-liquid accelerated separation is realized.
After the gas in the gas-liquid separator 8 is separated, a part of the gas is discharged through the hydrogen discharge valve 11, and a part of the gas is supplied to the gas-liquid separation passage 300 as an aerodynamic source. After the gas is input into the hydrogen circulation system 9, the hydrogen in the hydrogen supply device 10 can be pushed into the fuel cell stack 5 to carry out the power generation process, and the air compressor is not needed to additionally increase the power consumption, so that the working efficiency of the gas-liquid separator can be improved. Because the second impeller of the gas-liquid separator 8 arranged on the hydrogen side is coaxial with the first impeller of the air side, the first impeller can drive the second impeller when in operation, and therefore, the wet hydrogen on the hydrogen side of the gas-liquid separator 8 can be subjected to high-efficiency gas-liquid separation. The air at the outlet of the impeller at the air side of the gas-liquid separator 8 is merged with the hydrogen mixed gas at the outlet of the hydrogen discharge valve 11, and is finally discharged to the atmosphere.
The flow control valve 7 controls the opening thereof to control the gas pressure and flow rate in the second air passage 200, and finally controls the gas to enter the air side of the gas-liquid separator 8 to drive the first impeller to rotate at high speed.
As is known from the gas-water separation system of a fuel cell disclosed in fig. 1, the gas-water separation system of a fuel cell can introduce the exhaust gas in the first passage into the gas-liquid separation passage through the second air passage, and control the gas-water separation process through the flow control valve, thereby not only reducing the exhaust hydrogen concentration of the gas-liquid separator, but also providing assistance for the circulation of hydrogen gas, thereby improving the working efficiency of the gas-liquid separation passage.
In practical situations, the gas-liquid separator 8 needs to be combined with a gas-water separation system of the fuel cell and the relevant humidity parameter of the fuel cell stack during the gas-water separation control. For example, since the hydrogen humidity data of the second inlet of the fuel cell stack 5 can be obtained as the operating condition of the flow control valve 7, as can be seen from the schematic structural diagram of another gas-water separation system of the fuel cell shown in fig. 2, in some embodiments, the gas-liquid separation path 300 further includes: a second humidity sensor 13; the second humidity sensor 13 is disposed at the second air inlet of the fuel cell stack 5, and is configured to obtain a humidity value of the hydrogen inlet corresponding to the second air inlet of the fuel cell stack 5.
If it is inconvenient to provide the second humidity sensor 13 at the second air inlet of the fuel cell stack 5, a corresponding humidity sensor may be provided at the first air outlet of the gas-liquid separator 8. Specifically, the gas-liquid separation passage 300 further includes: a first humidity sensor 12; the first humidity sensor 12 is disposed at the first air outlet of the gas-liquid separator 8, and is configured to obtain a humidity value of the hydrogen side outlet corresponding to the first air outlet of the gas-liquid separator 8.
It is also possible to directly provide the humidity-related humidity sensor in the fuel cell stack 5 if it is inconvenient to provide the related humidity sensor in both of the gas-liquid separation passages 300. Specifically, the gas-water separation system of the fuel cell further comprises a third humidity sensor 14; the third humidity sensor 14 is provided in the humidity calculation unit of the fuel cell stack 5; the humidity calculation unit is used to acquire a humidity value of the fuel cell stack 5. It should be noted that the third humidity sensor 14 is a device of the gas-water separation system of the fuel cell, which is independent from the fuel cell stack 5, and the third humidity sensor 14 can measure the hydrogen humidity parameter in the gas-water separation system of the fuel cell, which is further used as the control condition of the flow control valve 7, so as to control the separation efficiency of the gas-liquid separator 8.
If the relevant humidity sensor is inconvenient to be arranged in the fuel cell stack 5, the relevant humidity parameter of the fuel cell stack 5 can be obtained through calculating the parameter of the fuel cell stack 5, and then the hydrogen humidity parameter in the gas-water separation system of the fuel cell is determined. Specifically, the humidity calculating unit further includes: a voltage calculation unit 15; and the voltage calculating unit 15 is used for calculating and obtaining the humidity parameter of the fuel cell stack according to the voltage parameter of the single cell in the fuel cell stack. The humidity calculation unit further includes: an impedance calculation unit 16; and an impedance calculating unit 16 for calculating a humidity value of the fuel cell stack 5 according to the impedance value in the fuel cell stack 5.
In order to prevent the impeller of the gas-liquid separator 8 from freezing during use in cold environments, the moisture in the passage may be dried by providing an associated air dryer. Specifically, in some embodiments, the second air passage 200 further comprises: a first air dryer 17; the first air dryer 17 is provided at the first air inlet of the gas-liquid separator 8, and is configured to dry air that enters the gas-liquid separator 8.
After passing through the first air dryer 17, the air entering the air side of the gas-liquid separator 8 can be kept dry, the possibility of dew condensation inside the impeller of the gas-liquid separator is reduced, the air in the impeller is in a dry state, and the dangerous condition that the impeller is frozen and clamped in winter is prevented.
Meanwhile, an associated air dryer may be further provided in the gas-liquid separation passage 300 to dry the air entering the fuel cell stack 5 to reduce dew condensation of the fuel cell stack 5 and associated devices in the gas-water separation system piping of the fuel cell, and thus, in some embodiments, the gas-liquid separation passage 300 further includes: a second air dryer 18; a second air dryer 18 is provided at the air inlet of the hydrogen circulation system 9 for drying the air entering the hydrogen circulation system 9.
As can be seen from the gas-water separation system of the fuel cell mentioned in the above embodiment, the gas-water separation system of the fuel cell can introduce the exhaust gas in the first passage into the gas-liquid separation passage through the second air passage, can reduce the power consumption of the air compressor, and can improve the operating efficiency of the gas-liquid separator without changing the power of the air compressor. Simultaneously, the rotational efficiency promotion of the inside impeller of vapour and liquid separator also can play the effect that promotes hydrogen circulation gas flow, provides the helping hand for the circulation of hydrogen, can play the effect of replacing hydrogen circulating pump and ejector etc. hydrogen circulating device to a certain extent. Because the gas in the second air passage is the waste gas of the fuel cell stack, and the oxygen content in the waste gas is low, the gas is used for finally carrying out gas-liquid separation on the wet hydrogen generated by the fuel cell stack through the second air passage, and the safety of the system is also improved to a certain extent.
The embodiment of the invention provides a control method of a gas-water separation system of a fuel cell, which is applied to the gas-water separation system of the fuel cell mentioned in the embodiment; as shown in fig. 3, the method comprises the steps of:
in step S301, when the first air passage is in an operating state, an opening value of the flow control valve is determined according to a state parameter of the fuel cell stack.
In step S302, the flow rate of the gas in the second air passage is controlled based on the determined opening value of the flow rate control valve.
And step S303, adjusting the gas-liquid separation efficiency of the gas-liquid separation passage in real time by using the gas flow in the second air passage.
Specifically, the above steps are an adaptive control process, and when the fuel cell stack is in operation, the gas-water separation system of the fuel cell adjusts the flow control valve according to the humidity value of hydrogen in the fuel cell stack, so as to change the gas flow in the second air passage, and further control the separation efficiency of the gas-liquid separator. For example, when it is detected that the hydrogen gas humidity value in the fuel cell stack is smaller than the relevant threshold value, the opening degree of the flow control valve is controlled to be decreased, thereby decreasing the separation efficiency of the gas-liquid separator; when the fact that the humidity value of the hydrogen in the fuel cell stack is larger than the relevant threshold value is detected, the opening degree of the flow control valve is controlled to be increased, so that the separation efficiency of the gas-liquid separator is improved, and the self-adaptive control of the gas-liquid separator is achieved.
As can be seen from the control method of the gas-water separation system of the fuel cell mentioned in the above embodiment, in the control process of the gas-water separation system of the fuel cell, the first impeller arranged in the second air passage can be used for driving the second impeller in the gas-liquid separator, so that the exhaust energy in the first passage can be utilized to the gas-liquid separator, additional power is provided for the gas-liquid separation in the gas-liquid separator, and the working efficiency of the gas-liquid separation passage is improved.
The gas-water separation system of the fuel cell in the embodiment has the same technical characteristics as the gas-water separation system of the fuel cell provided in the above method embodiment, so the same technical problems can be solved, and the same technical effects can be achieved. For the sake of brevity, where not mentioned in the section of the embodiments, reference may be made to the corresponding matters in the foregoing embodiments.
The present embodiment also provides a fuel cell system, as shown in fig. 4, which includes a fuel cell stack 5, and a gas-water separation system 400 of the fuel cell as mentioned in the above embodiments; wherein the gas-water separation system 400 of the fuel cell performs the control method of the gas-water separation system of the fuel cell mentioned in the above-mentioned embodiment when performing the water-gas separation.
The embodiment also provides an electronic device, which is shown in fig. 5 as a schematic structural diagram, and includes a processor 501 and a memory 502; the memory 502 is used for storing one or more computer instructions, and the one or more computer instructions are executed by the processor to realize the control method of the fuel cell-based gas-water separation system.
The server shown in fig. 5 further comprises a bus 503 and a communication interface 504, and the processor 501, the communication interface 504 and the memory 502 are connected by the bus 503.
The Memory 502 may include a Random Access Memory (RAM) and a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. Bus 503 may be an ISA bus, PCI bus, EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 5, but this does not indicate only one bus or one type of bus.
The communication interface 504 is used for connecting with at least one user terminal and other network units through a network interface, and sending the packaged IPv4 message or IPv4 message to the user terminal through the network interface.
The processor 501 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 501. The Processor 501 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component. The various methods, steps, and logic blocks disclosed in the embodiments of the present disclosure may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present disclosure may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 502, and the processor 501 reads the information in the memory 502 and completes the steps of the method of the foregoing embodiment in combination with the hardware thereof.
Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, performs the steps of the method of the foregoing embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in software functional units and sold or used as a stand-alone product, may be stored in a non-transitory computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present invention or a part thereof, which essentially contributes to the prior art, can be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A gas-water separation system of a fuel cell, which is connected with a fuel cell stack, comprising: a first air passage, a second air passage, and a gas-liquid separation passage;
wherein the first air passage includes therein: the system comprises an air inlet system, an air compressor, an intercooler, a humidifier and a back pressure valve; the air inlet end of the air inlet system is used for inputting atmosphere, and the air outlet end of the air inlet system is connected with the inlet of the intercooler through the air compressor; an air outlet of the intercooler is connected with a first air inlet of the fuel cell stack through a dry side passage of the humidifier; the first air outlet of the fuel cell stack is connected with the back pressure valve through a wet side passage of the humidifier;
the second air passage includes: a flow control valve and a first impeller; the first air outlet of the fuel cell stack is connected with the air inlet of the flow control valve through a wet side passage of the humidifier; the first impeller is arranged at an air outlet of the flow control valve;
the gas-liquid separation passage includes: a hydrogen discharge valve, a hydrogen circulation system and a gas-liquid separator; the gas-liquid separator is internally provided with a second impeller, the second impeller is used for carrying out gas-liquid separation on a second gas outlet of the fuel cell stack, and the first impeller and the second impeller are in coaxial transmission; the first gas outlet of the gas-liquid separator is connected with the hydrogen discharge valve; the second gas outlet of the gas-liquid separator is connected with the gas inlet of the hydrogen circulation system; and the gas outlet of the hydrogen circulating system and a preset hydrogen supply device are respectively connected with the second gas inlet of the fuel cell stack.
2. The gas-water separation system for a fuel cell according to claim 1, wherein the gas-water separation passage further includes: a first humidity sensor; the first humidity sensor is arranged at the first air outlet of the gas-liquid separator and used for acquiring the humidity value of the hydrogen side outlet corresponding to the first air outlet of the gas-liquid separator.
3. The gas-water separation system for a fuel cell according to claim 1, wherein the gas-water separation passage further includes: a second humidity sensor; the second humidity sensor is arranged at a second air inlet of the fuel cell stack and used for acquiring a humidity value of a hydrogen inlet corresponding to the second air inlet of the fuel cell stack.
4. The gas-water separation system of a fuel cell according to claim 1, further comprising a third humidity sensor; the third humidity sensor is arranged in a humidity calculation unit of the fuel cell stack; the humidity calculation unit is used for acquiring a humidity parameter of the fuel cell stack.
5. The gas-water separation system for a fuel cell according to claim 4, wherein the humidity calculation unit further includes: a voltage calculation unit; and the voltage calculation unit is used for calculating and obtaining the humidity parameter of the fuel cell stack according to the voltage parameter of the single cell in the fuel cell stack.
6. The gas-water separation system of a fuel cell according to claim 4, wherein the humidity calculation unit further includes: an impedance calculation unit; and the impedance calculation unit is used for calculating the humidity parameter of the fuel cell stack according to the impedance value in the fuel cell stack.
7. The gas-water separation system of a fuel cell according to claim 1, wherein the second air passage further includes: a first air dryer; the first air dryer is arranged at a first air inlet of the gas-liquid separator and used for drying air entering the gas-liquid separator.
8. The gas-water separation system of a fuel cell according to claim 1, wherein the gas-liquid separation passage further includes: a second air dryer; the second air dryer is arranged at an air inlet of the hydrogen circulation system and is used for drying air entering the hydrogen circulation system.
9. A control method of a gas-water separation system of a fuel cell, characterized in that the method is applied to the gas-water separation system of a fuel cell according to any one of claims 1 to 8; the method comprises the following steps:
when the first air channel is in a working state, determining an opening value of the flow control valve according to a state parameter of the fuel cell stack;
controlling the flow of gas in the second air passage in accordance with the determined opening value of the flow control valve;
and adjusting the gas-liquid separation efficiency of the gas-liquid separation passage in real time by using the gas flow in the second air passage.
10. A fuel cell system comprising a fuel cell stack and a gas-water separation system of the fuel cell according to any one of claims 1 to 8; the gas-water separation system for a fuel cell of claim 9, wherein the method for controlling the gas-water separation system for a fuel cell is performed when the gas-water separation is performed.
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| CN202211154813.7A CN115241496B (en) | 2022-09-22 | 2022-09-22 | Gas-water separation system of fuel cell, control method and fuel cell system |
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| CN202211154813.7A CN115241496B (en) | 2022-09-22 | 2022-09-22 | Gas-water separation system of fuel cell, control method and fuel cell system |
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| JP2002324561A (en) * | 2001-04-27 | 2002-11-08 | Mitsubishi Heavy Ind Ltd | Gas-liquid separator and fuel cell power-generating system using it |
| JP2011014429A (en) * | 2009-07-03 | 2011-01-20 | Toyota Motor Corp | Fuel cell system |
| WO2011151864A1 (en) * | 2010-06-03 | 2011-12-08 | トヨタ自動車株式会社 | Fuel cell system |
| CN108448133A (en) * | 2018-04-28 | 2018-08-24 | 南京晓庄学院 | A kind of fuel supply system of solid-oxide fuel cell stack |
| CN213845338U (en) * | 2020-10-23 | 2021-07-30 | 广东能源集团科学技术研究院有限公司 | Fuel cell cathode humidifying system |
| CN114122454A (en) * | 2021-11-25 | 2022-03-01 | 上海捷氢科技股份有限公司 | Fuel cell and air supply system thereof |
| CN114243056B (en) * | 2021-12-16 | 2023-04-25 | 中车株洲电机有限公司 | Fuel cell system with energy recovery module |
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