CN115117404B - Hydrogen purging system - Google Patents
Hydrogen purging system Download PDFInfo
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- CN115117404B CN115117404B CN202211012143.5A CN202211012143A CN115117404B CN 115117404 B CN115117404 B CN 115117404B CN 202211012143 A CN202211012143 A CN 202211012143A CN 115117404 B CN115117404 B CN 115117404B
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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
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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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0267—Collectors; Separators, e.g. bipolar separators; Interconnectors having heating or cooling means, e.g. heaters or coolant flow channels
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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
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- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04014—Heat exchange using gaseous fluids; Heat exchange by combustion of reactants
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- 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
- H01M8/04082—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
- H01M8/04126—Humidifying
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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
- H01M8/04537—Electric variables
- H01M8/04544—Voltage
- H01M8/04559—Voltage of fuel cell stacks
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
- H01M8/0662—Treatment of gaseous reactants or gaseous residues, e.g. cleaning
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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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Abstract
The invention relates to a hydrogen purging system, which comprises a stack box, a fuel cell stack, a gas cooling fuel cell stack, an air supply device and an exhaust fan, wherein the stack box is connected with the air supply device; the first internal fluid channel of the anode plate of the gas cooling fuel cell stack is open and connected with the stack box, when hydrogen leaks into the stack box, the hydrogen diffuses out of the gas cooling fuel cell stack along the first internal fluid channel, the gas cooling fuel cell stack converts the hydrogen which is not diffused in time into electric energy, and generates a corresponding voltage value, when the hydrogen leakage amount is more, the voltage value is higher, when the voltage of the gas cooling fuel cell stack reaches a preset value, the exhaust fan is driven to rotate, the hydrogen diffusion is accelerated, in addition, the first internal fluid channel is open, and the hydrogen can serve as a cooling medium to cool the gas cooling fuel cell stack. The invention can control the exhaust fan without installing a hydrogen sensor, thereby reducing the failure rate, reducing the technical difficulty of maintenance and improving the safety performance of the hydrogen purging system.
Description
Technical Field
The invention relates to the technical field of proton exchange membrane fuel cells, in particular to a hydrogen purging system.
Background
The fuel cell stack is a core part of a proton exchange membrane fuel cell engine, and the fuel cell stack inevitably generates hydrogen leakage in the use process.
Hydrogen from the fuel cell stack is easily leaked to the sealed stack box, and when the leaked hydrogen in the stack box is accumulated to the explosion limit concentration (4% -75%), the stack box generates a potential safety hazard.
The prior art generally adopts a method of shunting a strand of air (without using a hydrogen concentration sensor, purging regardless of leakage or not), continuously purging a pile box and replacing leaked hydrogen. But this kind of scheme has increased the burden of air compressor machine, waste energy. Therefore, the exhaust fan can be controlled by installing a hydrogen sensor, but since the hydrogen sensor is easily drifted and damaged, many safety hazards and malfunctions are caused.
Disclosure of Invention
Based on this, the invention provides a hydrogen purging system with high safety performance.
A hydrogen purging system, comprising:
a stack case;
the fuel cell stack is arranged in the stack box, and hydrogen leaked by the fuel cell stack is diffused into the stack box;
the gas-cooled fuel cell stack comprises an anode plate, the gas-cooled fuel cell stack is arranged on the stack box, the anode plate is provided with a first internal fluid channel, the first internal fluid channel is open and communicated with the stack box, part of leaked hydrogen in the stack box is diffused to the outside of the stack box through the first internal fluid channel, and the gas-cooled fuel cell stack converts the other part of leaked hydrogen in the stack box into electric energy and generates a corresponding voltage value;
the exhaust fan, the exhaust fan set up in outside the pile box, the exhaust fan with the gas cooling fuel cell pile electricity is connected, works as when the voltage value that produces reaches the default in the gas cooling fuel cell pile, the gas cooling fuel cell pile drive the exhaust fan rotates, in order to accelerate hydrogen diffusion in the pile box extremely outside the pile box.
Preferably, the gas-cooled fuel cell stack further comprises a cathode plate and a membrane electrode, the anode plate and the cathode plate are arranged oppositely, the membrane electrode is arranged between the anode plate and the cathode plate, the cathode plate is provided with a second internal fluid channel, and air passes through the second internal fluid channel and is exhausted after being consumed by the stack.
Preferably, the voltage preset value in the gas-cooled fuel cell stack is 5V.
Preferably, the gas-cooled fuel cell stack is disposed on top of the stack cassettes.
Preferably, the hydrogen purging system further comprises an air supply device, the air supply device comprises a first air outlet and an electromagnetic valve, the first air outlet is connected with the electromagnetic valve, the electromagnetic valve is electrically connected with the gas-cooled fuel cell stack, when the voltage in the gas-cooled fuel cell stack reaches a preset value, the electromagnetic valve is opened, and the air in the air supply device is blown out through the first air outlet to supply the cathode reactant of the gas-cooled fuel cell stack, and is exhausted after reaction consumption.
Preferably, the air supply device further comprises a second air outlet, the second air outlet is connected with the electromagnetic valve, when the voltage in the gas-cooled fuel cell stack reaches a preset value, the electromagnetic valve is opened, the air in the air supply device is blown out through the second air outlet, and the air blown out through the second air outlet enters the stack box.
Preferably, the air supply device comprises a humidifier connected to the solenoid valve, and the humidifier is configured to humidify air and deliver the humidified air to the solenoid valve.
Preferably, still be provided with the third gas outlet, go into gas port and gaseous separation piece on the humidifier, the third gas outlet with go into the gas port all with the fuel cell galvanic pile is connected, gaseous separation piece is used for the separation gas, and liquid can pass gaseous separation piece, after the humidification the air process the third gas outlet gets into in the fuel cell galvanic pile, the gas of fuel cell galvanic pile by it gets into in the humidifier to go into the gas port.
Preferably, the gas barrier is a proton exchange membrane.
Preferably, the air supply device comprises a silencer and a back pressure valve, the back pressure valve is connected with the humidifier, the gas entering the air inlet is discharged through the back pressure valve, and the silencer is used for carrying out silencing treatment on the gas discharged from the back pressure valve.
Compared with the prior art, the invention has the following beneficial effects:
the hydrogen purging system comprises a stack box, a fuel cell stack, a gas cooling fuel cell stack, an air supply device and an exhaust fan, wherein a first internal fluid channel of an anode plate of the gas cooling fuel cell stack is open and is connected with the stack box, when hydrogen in the fuel cell stack leaks into the stack box, a part of the hydrogen leaking into the stack box enters the gas cooling fuel cell stack along a first interior and diffuses out of the gas cooling fuel cell stack, the gas cooling fuel cell stack converts hydrogen which is not diffused in time in the other part of the stack box into electric energy and generates a corresponding voltage value, when the more the hydrogen leakage amount is, the higher the voltage value is, when the voltage value of the gas cooling fuel cell stack reaches a preset value, the gas cooling fuel cell stack drives the exhaust fan to rotate, so that the diffusion of the hydrogen is accelerated, the concentration of the hydrogen in the stack box is reduced, in addition, a first internal cooling pipeline of the anode plate is open, and the hydrogen serves as a cooling medium in the first internal cooling pipeline to cool the gas cooling fuel cell stack. According to the scheme adopted by the invention, the exhaust fan can be controlled without installing a hydrogen sensor, so that the failure rate is reduced, the technical difficulty of maintenance is reduced, and the safety performance of the hydrogen purging system is improved.
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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the apparatuses shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of a hydrogen purging system in one embodiment;
FIG. 2 is a schematic diagram of a portion of a gas-cooled fuel cell stack according to an exemplary embodiment;
FIG. 3 is a schematic view of a portion of a gas-cooled fuel cell stack according to an exemplary embodiment;
fig. 4 is a partial structural view of a gas-cooled fuel cell stack according to an embodiment.
Wherein, 100, the galvanic pile box; 200. a fuel cell stack; 210. a hydrogen inlet; 220. an air inlet; 230. a gas outlet; 300. gas-cooled fuel cell stacks; 310. an anode plate; 320. a cathode plate; 330. a membrane electrode; 340. a bipolar plate; 400. an air supply device, 410 humidifier; 411. a first air outlet; 412. a second air outlet; 413. an air inlet; 414. an electromagnetic valve; 415. a back pressure valve; 416. a third air outlet; 420. an intercooler; 430. an air compressor; 440. an air flow meter; 450. a filter; 500. an exhaust fan; 600. a silencer.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The concept and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.
In the description of the present invention, if an orientation description is referred to, for example, the orientations or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc. are based on the orientations or positional relationships shown in the drawings, only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. If a feature is referred to as being "disposed," "secured," "connected," or "mounted" to another feature, it can be directly disposed, secured, or connected to the other feature or indirectly disposed, secured, connected, or mounted to the other feature.
In the description of the embodiments of the present invention, if "a number" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "greater than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "greater than", "lower" or "inner" is referred to, it is understood that the number is included. References to "first" and "second" are to be understood as distinguishing technical features and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
Referring to fig. 1 and 2, the present invention provides a hydrogen purging system, which includes a stack box 100, a fuel cell stack 200, a gas-cooled fuel cell stack 300, and an exhaust fan 500, wherein the fuel cell stack 200 is disposed in the stack box 100, and hydrogen leaked from the fuel cell stack 200 diffuses into the stack box 100; the gas-cooled fuel cell stack 300 comprises an anode plate 310, the gas-cooled fuel cell stack 300 is arranged on the stack box 100, the anode plate 310 is provided with an internal fluid channel, the internal cooling pipe of the anode plate 310 is open and is communicated with the stack box 100, a part of leaked hydrogen in the stack box 100 is diffused to the outside of the stack box 100 through a first internal fluid channel, and the gas-cooled fuel cell stack 300 converts another part of leaked hydrogen in the stack box 100 into electric energy and generates a corresponding voltage value; the exhaust fan 500 is disposed outside the stack box 100, the exhaust fan 500 is electrically connected to the gas-cooled fuel cell stack 300, and when the voltage value generated in the gas-cooled fuel cell stack 300 reaches a predetermined value, the gas-cooled fuel cell stack 300 drives the exhaust fan 500 to rotate, so as to accelerate the diffusion of the hydrogen in the stack box 100 to the outside of the stack box 100.
Specifically, the hydrogen purging system of the present invention includes a stack cartridge 100, a fuel cell stack 200, a gas-cooled fuel cell stack 300, an air supply device 400, and a discharge fan 500, wherein a first internal fluid passage of an anode plate 310 of the gas-cooled fuel cell stack 300 is open and connected to the stack cartridge 100, when hydrogen in the fuel cell stack 200 leaks into the stack cartridge 100, a portion of the hydrogen leaking into the stack cartridge 100 enters the gas-cooled fuel cell stack 300 along the first internal fluid passage of the anode plate 310 and diffuses out of the gas-cooled fuel cell stack 300, the gas-cooled fuel cell stack 300 converts hydrogen that is not diffused in time in another portion of the stack cartridge 100 into electrical energy and generates a corresponding voltage value, and when the voltage value of the gas-cooled fuel cell stack 300 reaches a preset value as the amount of the hydrogen leaking is larger, the gas-cooled fuel cell stack 300 drives the discharge fan 500 to rotate, thereby accelerating the diffusion of hydrogen to reduce the concentration of hydrogen in the stack cartridge 100, and further, the first internal fluid passage of the gas-cooled fuel cell stack 300 is open to serve as a cooling medium for cooling the anode plate 300 in the gas-cooled fuel cell stack cartridge. According to the scheme adopted by the invention, the exhaust fan 500 can be controlled without installing a hydrogen sensor, so that the failure rate is reduced, the technical difficulty of maintenance is reduced, and the safety performance of the hydrogen purging system is improved.
In an embodiment, the hydrogen purging system further includes an air supply device 400, the air supply device includes a first air outlet 411, a second air outlet 412 and an electromagnetic valve 414, the first air outlet 411 and the second air outlet 412 are respectively connected to the electromagnetic valve 414, the electromagnetic valve 414 is electrically connected to the gas-cooled fuel cell stack 300, when the voltage in the gas-cooled fuel cell stack 300 reaches a preset value, the electromagnetic valve 414 is opened, the air in the air supply device 400 is blown out through the first air outlet 411 and the second air outlet 412, the air blown out from the first air outlet 411 is in contact with the cathode plate 320, and the air blown out from the second air outlet 412 enters the interior of the stack box 100. Specifically, hydrogen enters the gas-cooled fuel cell stack 300 along the internal cooling pipe of the anode plate 310, contacts the anode plate 310 in the gas-cooled fuel cell stack 300, and diffuses out of the gas-cooled fuel cell stack 300, the gas-cooled fuel cell stack 300 converts another part of hydrogen which is not diffused in time into electric energy, and generates a corresponding voltage value, when the more hydrogen leaks, the higher the voltage value is, and when the voltage value of the gas-cooled fuel cell stack 300 reaches a preset value, the gas-cooled fuel cell stack 300 drives the exhaust fan 500 to rotate and drives the electromagnetic valve 414 to open, on one hand, the first air outlet 411 blows out air and reacts with the cathode reactant in the gas-cooled fuel cell stack 300 for supplying the gas-cooled fuel cell stack 300, so as to increase the supply of air, and after reaction consumption, the more leaked hydrogen is exhausted and reacts with air (oxygen) to be converted into electric energy; on the other hand, air blown out of the second air outlet 412 is blown into the stack case 100 to replace hydrogen, so that diffusion of hydrogen leaked in the stack case 100 can be accelerated; in addition, the rotation of the exhaust fan 500 can also accelerate the diffusion of hydrogen to reduce the concentration of hydrogen in the stack case 100. The present invention is designed to automatically treat the leaked hydrogen according to the amount of hydrogen leakage, and simultaneously open the solenoid valve 414 of the air purge system to supply air to consume the leaked hydrogen, purge the stack cartridge 100, and continuously generate electric power to drive the exhaust fan 500 to exhaust the hydrogen out of the stack cartridge 100. More specifically, the exhaust fan 500 employs an induced draft design to prevent hydrogen from being blown back into the inside of the stack case 100.
Referring to fig. 3 and 4, in an embodiment, the gas-cooled fuel cell stack further includes a cathode plate 320 and a membrane electrode 330, the anode plate 310 and the cathode plate 320 are disposed opposite to each other, the membrane electrode 330 is disposed between the anode plate 310 and the cathode plate 320, the cathode plate 320 is provided with an internal fluid channel, the cathode plate 320 is provided with a second internal fluid channel through which air is exhausted after being consumed by the gas-cooled fuel cell stack 300, the anode plate 310 and the cathode plate 320 are encapsulated by an encapsulation adhesive to obtain a plurality of bipolar plates 340, the number of the bipolar plates 340 is multiple, the membrane electrode 330 is disposed between the two bipolar plates 340, and the membrane electrode 330 contains a catalyst. That is, the gas-cooled fuel cell stack 300 of the present invention is an open anode, closed cathode stack, as opposed to a conventional air-cooled stack (which is an open cathode and a closed anode). Specifically, the internal cooling duct of the cathode plate 320 is closed, so that the air blown out from the first air outlet 411 is isolated from the hydrogen in the stack cartridge 100, a large amount of hydrogen-oxygen mixed gas is not generated, and a potential explosion risk is prevented.
Further, the fuel cell stack 200 and the gas-cooled fuel cell stack 300 both use oxygen in the air as an oxidant, and fuel hydrogen releases electrons under the action of a catalyst in the anode to generate protons H + The proton exchange membrane converts the proton H under the action of an electric field + Oxygen in the cathode is transferred from the anode to the cathode, and electrons transported by the cathode through an external circuit are obtained on the surface of the catalyst to form O 2- Ion, cathode O 2- With the transferred protons H + Water is generated by combination, and electric energy conversion is completed.
The anodic reaction and the cathodic reaction can be represented by the following formula:
and (3) anode reaction: h 2 →2H + +2e - ；
And (3) cathode reaction: 1/2O 2 +2H + +2e - →H 2 O；
And (3) total reaction: h 2 +1/2O 2 →H 2 O。
Specifically, the voltage preset value in the gas-cooled fuel cell stack 300 is 5V, and correspondingly, the solenoid valve 414 is 5VCD and the exhaust fan 500 is 5VD, and the exhaust fan 500 is electrically opened.
In an embodiment, the air supply device 400 includes a humidifier 410, the humidifier 410 is provided with a first air outlet 411, a second air outlet 412 and a solenoid valve 414, and the humidifier 410 is used for humidifying air.
In an embodiment, the humidifier 410 is further provided with a third air outlet 416, an air inlet 413 and a gas barrier, the third air outlet 416 and the air inlet 413 are both connected to the fuel cell stack 200, the gas barrier is used for separating air, liquid can pass through the gas barrier, humidified air enters the fuel cell stack 200 through the third air outlet 416, and air of the fuel cell stack 200 enters the humidifier 410 through the air inlet 413.
In one embodiment, the gas barrier is a proton exchange membrane.
In one embodiment, the voltage preset value in the gas-cooled fuel cell stack 300 is 5V, and in some embodiments, the gas-cooled fuel cell stack 300 is disposed on top of the stack cartridge 100. Specifically, the fuel cell stack 200 has no ventilation inlet, and the gas-cooled fuel cell stack 300 is disposed on the top of the stack box 100, so as to solve the sealing problem of the stack box 100 when the fuel cell stack is in water leakage or flooding
Referring to fig. 1, in an embodiment, the air supply device 400 further includes an intercooler 420, an air compressor 430, an air flow meter 440, and a filter 450, the humidifier 410 is provided with a first air outlet 411, the intercooler 420, the air compressor 430, the air flow meter 440, and the filter 450 are sequentially connected to the humidifier 410, the filter 450 is used for filtering air, the air flow meter 440 is used for measuring the air flow after filtering, the air compressor 430 is used for compressing the measured air, the intercooler 420 is used for cooling the compressed air, the humidifier 410 is used for humidifying the air after cooling, and the humidified air enters and is blown out from the first air outlet 411. Specifically, the filter 450 filters particulate matters in the air, and can also effectively adsorb pollutants in the air, on the other hand, the fuel cell stack 200 and the gas-cooled fuel cell stack 300 perform electrochemical reaction, and air with appropriate temperature and humidity needs to be provided, so that the intercooler 420 and the humidifier 410 are arranged, and in addition, the air compressor 430 is arranged, so that the air is compressed, so that the oxygen in the air is also compressed, so that the oxygen content in the unit space is more, and the oxygen is enough to meet the requirement of the electrochemical reaction.
Specifically, referring to fig. 1, the direction of the arrow is a gas flowing direction, the fuel cell stack 200 is further provided with a hydrogen inlet 210, an air inlet 220 and a gas outlet 230, the air inlet 220 is connected to a second gas outlet 412, and hydrogen enters the fuel cell stack 200 from the hydrogen inlet 210 for reaction. The air of the intercooler 420 and the air inlet 413 entering the humidifier 410 is separated by the proton exchange membrane and is divided into an air channel and an impurity gas channel, the air of the intercooler 420 entering the humidifier 410 is respectively conveyed to the gas cooling fuel cell stack 300 and the fuel cell stack 200 through the first air outlet 411 and the second air outlet 412, the gas of the fuel cell stack 200 discharged from the gas outlet 230 and entering the humidifier 410 through the air inlet 413 is water generated by electrochemical reaction in the fuel cell stack 200 and impurity gas of a reaction system, the impurity gas and the water are mixed and enter the impurity gas channel of the humidifier 410, the water can penetrate through the proton exchange membrane and enter the air in the air channel to be humidified and is discharged from the first air outlet 411 and the second air outlet 412, in addition, the water can also remain in the humidifier 410 to add water to the humidifier 410.
Referring to fig. 1, in an embodiment, the air supply device 400 includes a muffler 600 and a back pressure valve 415, the back pressure valve 415 is disposed on the humidifier 410, the muffler 600 is disposed around the back pressure valve 415, the gas entering the gas inlet 413 is discharged through the back pressure valve 415, and the muffler 600 is used for silencing the gas discharged from the back pressure valve 415. Specifically, the impurity gas is discharged through the back pressure valve 415, and a large noise is generated due to a velocity block of the impurity gas discharged, and thus, the noise is reduced by providing a silencer 600 around the back pressure valve 415.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Claims (10)
1. A hydrogen purging system, comprising:
a stack case;
the fuel cell stack is arranged in the stack box, and hydrogen leaked by the fuel cell stack is diffused into the stack box;
the gas-cooled fuel cell stack comprises an anode plate, the gas-cooled fuel cell stack is arranged on the stack box, the anode plate is provided with a first internal fluid channel, the first internal fluid channel is open and communicated with the stack box, part of leaked hydrogen in the stack box is diffused to the outside of the stack box through the first internal fluid channel, and the gas-cooled fuel cell stack converts the other part of leaked hydrogen in the stack box into electric energy and generates a corresponding voltage value;
the exhaust fan, the exhaust fan set up in outside the pile box, the exhaust fan with the gas cooling fuel cell pile electricity is connected, works as when the voltage value that produces reaches the default in the gas cooling fuel cell pile, the gas cooling fuel cell pile drive the exhaust fan rotates, in order to accelerate hydrogen diffusion in the pile box extremely outside the pile box.
2. The hydrogen purge system of claim 1, wherein the gas-cooled fuel cell stack further comprises a cathode plate and a membrane electrode, the anode plate and the cathode plate being disposed opposite each other, the membrane electrode being disposed between the anode plate and the cathode plate, the cathode plate being provided with a second internal fluid channel through which air passes to be exhausted after being consumed by the gas-cooled fuel cell stack.
3. A hydrogen purging system according to claim 1, wherein the voltage preset within the gas-cooled fuel cell stack is 5V.
4. The hydrogen purging system of claim 1, wherein the gas-cooled fuel cell stack is disposed on top of the stack cartridge.
5. The hydrogen purging system according to claim 2, further comprising an air supply device, wherein the air supply device comprises a first air outlet and a solenoid valve, the first air outlet is connected with the solenoid valve, the solenoid valve is electrically connected with the gas-cooled fuel cell stack, when the voltage in the gas-cooled fuel cell stack reaches a preset value, the solenoid valve is opened, air in the air supply device is blown out through the first air outlet, and the air blown out through the first air outlet is used for supplying a cathode reactant of the gas-cooled fuel cell stack.
6. The hydrogen purging system according to claim 5, wherein the air supply device further comprises a second air outlet connected to the solenoid valve, and when the voltage in the gas-cooled fuel cell stack reaches a preset value, the solenoid valve is opened, and the air in the air supply device is blown out through the second air outlet, and the air blown out through the second air outlet enters the interior of the stack box.
7. A hydrogen purging system according to claim 5, wherein the air supply device includes a humidifier connected to the solenoid valve, the humidifier being configured to humidify air and deliver humidified air to the solenoid valve.
8. The hydrogen purging system according to claim 7, wherein the humidifier further comprises a third gas outlet, a gas inlet and a gas blocking member, the third gas outlet and the gas inlet are both connected to the fuel cell stack, the gas blocking member is used for blocking gas, liquid can pass through the gas blocking member, the humidified air enters the fuel cell stack through the third gas outlet, and gas of the fuel cell stack enters the humidifier through the gas inlet.
9. A hydrogen purging system according to claim 8, wherein the gas barrier is a proton exchange membrane.
10. A hydrogen purging system as claimed in claim 9, wherein the air supply device comprises a muffler and a back pressure valve, the back pressure valve is connected to the humidifier, the gas entering the gas inlet is discharged through the back pressure valve, and the muffler is configured to muffle the gas discharged from the back pressure valve.
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| CN209894413U (en) * | 2019-05-09 | 2020-01-03 | 深圳国氢新能源科技有限公司 | Hydrogen leakage monitoring device of hydrogen fuel cell |
| CN110797559A (en) * | 2019-11-06 | 2020-02-14 | 行云新能科技（深圳）有限公司 | Control method, control device and storage medium for hydrogen fuel cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN209894413U (en) * | 2019-05-09 | 2020-01-03 | 深圳国氢新能源科技有限公司 | Hydrogen leakage monitoring device of hydrogen fuel cell |
| CN110797559A (en) * | 2019-11-06 | 2020-02-14 | 行云新能科技（深圳）有限公司 | Control method, control device and storage medium for hydrogen fuel cell |
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