CN109904492A - The exchange water content of membrane control method and cathode air supply system of fuel cell - Google Patents
The exchange water content of membrane control method and cathode air supply system of fuel cell Download PDFInfo
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- 239000012528 membrane Substances 0.000 title claims abstract description 58
- 239000000446 fuel Substances 0.000 title claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000007789 gas Substances 0.000 claims abstract description 114
- 239000012495 reaction gas Substances 0.000 claims abstract description 55
- 230000008859 change Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000006722 reduction reaction Methods 0.000 description 4
- 239000006227 byproduct Substances 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000006424 Flood reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
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Classifications
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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 present invention relates to field of fuel cell technology, specifically provide the exchange water content of membrane control method and cathode air supply system of a kind of fuel cell.The cathode air supply system of fuel cell includes pile, the exchange membrane chemically reacted for cathode reaction gas is equipped in pile, exchange membrane side is equipped with cathode gas passage, the cathode gas passage has air inlet side and exhaust side, cathode air supply system further includes the cathode feeder for supplying to cathode gas passage, and the cathode feeder, which has, to be passed through the first working condition of cathode reaction gas to air inlet side and be passed through the second working condition of cathode reaction gas to exhaust side.By the change of working condition, can be realized adjustment cathode reaction gas is parallel to the flow direction of exchange membrane, so that uniform moisture on exchange membrane be made to arrange.
Description
Technical field
The present invention relates to field of fuel cell technology, specifically provide a kind of exchange water content of membrane controlling party of fuel cell
Method and cathode air supply system.
Background technique
With the continuous consumption of fossil energy, society is by the predicament of energy shortage, and fossil energy is being extracted, transported
Many environmental problems are also resulted in during defeated and use.It is especially generated when obtaining energy using fossil fuel
By-product will lead to global warming, cause extremely serious atmosphere pollution.In the alternative of all fossil fuels, due to combustion
The good operating characteristics of material battery, the advantages that power generation settings are friendly, become a kind of most promising energy-provision way.
In many fuel cells, Proton Exchange Membrane Fuel Cells (PEMFC) has high, pollution-free, cold-starting of power density etc.
Advantage is widely used in the market.
Proton Exchange Membrane Fuel Cells uses solid polymer --- and proton exchange membrane is electrolyte, and performance is handed over by proton
The influence for changing film conductivity is very significant.Proton exchange membrane needs that water is combined just to be able to maintain proton and is handing over during battery operation
The conductibility on film is changed, the more high then proton conductivity of the content of water is stronger, if water content is less, the impedance of exchange membrane increases
Add, in high current density, will lead to very big ohmic loss, if exchange membrane dehydration or withered, the activity of Catalytic Layer will under
Drop, causes battery that cannot work, will cause the rupture of exchange membrane when serious, hydrogen and oxygen is caused to be mutually mixed, or even can send out
Raw explosion.The conductivity of proton exchange membrane and its own water content are closely related, and this requires reaction gas to enter fuel
It is humidified before battery, a certain amount of vapor is brought into fuel cell, proton exchange membrane is made to keep wet state, but
Being not is that humidity gets over Gao Yuegao, if control is bad, saying causes fuel battery inside ponding excessive, causes the catalysis in electrode
Agent is pickled, and is lost activity, and can also form gas-liquid two-phase flow in runner and diffusion layer in a fuel cell, causes part
Obstruction makes the flowing of hydrogen and oxygen and diffusion weaken or interrupt, and mass transport process is obstructed, and then influences the work of battery.Generally
Think that low current, big flow, low humidity will lead to film water shortage, high current, small flow, high humility may cause water logging, therefore change
It is particularly significant to fuel battery performance is improved by fuel cell is introduced by wet reaction gas into intake method.
Publication No. CN1996653A, publication date are that the Chinese patent on July 11st, 2007 discloses a kind of fuel cell
Intake method, the fuel cell include by multiple single battery groups at pile, the primary air inlet that is arranged on pile and
Gas outlet, for monocell flow field plate runner by primary air inlet air inlet, the fuel cell is additionally provided with secondary air inlet mouth, and described two
Phase air inlet is also identical as flow field plate runner to realize secondary air inlet, and the pressure of secondary air inlet is less than main admission pressure, with this
To improve the distribution of electric pool gas.It is secondary by being equipped at close runner exit in the technical solution of the patent
Air inlet, can be to improve the concentration of cathode oxygen or anode hydrogen gas, while quickly air-flow takes away the water of cathode generation, effectively
Ground improves the water distribution of cathode, reduces cathode concentration polarization, is conducive to the performance for improving monocell.
But the problem of above-mentioned patent, is, secondary air inlet mouth is arranged in the inside of fuel cell, needs to change runner
Structure, structure is complicated, and design difficulty is big, manufacturing cost is high, while will increase maintenance difficulties.
Summary of the invention
It is right in the outside of cathode gas passage the purpose of the present invention is to provide a kind of cathode air supply system of fuel cell
Cathode reaction gas is controlled, and it is uneven and lead to the skin covering of the surface of exchange membrane to be able to solve moisture on exchange membrane in the prior art
The problem of dry or water logging, guarantees that the activity of catalyst in exchange membrane to make fuel cell be in preferable working condition, improves
The efficiency and service life of fuel cell self-energy conversion；A kind of exchange for being designed to provide fuel cell of the present invention simultaneously
Water content of membrane control method.
To achieve the above object, the cathode air supply system of fuel cell adopts the following technical scheme that in the present invention
Technical solution 1: the cathode air supply system of fuel cell, including pile, pile is interior to be equipped with for cathode reaction gas
The exchange membrane of reaction is learned, exchange membrane side is equipped with cathode gas passage, and the cathode gas passage has air inlet side and exhaust side,
Cathode air supply system further includes the cathode feeder for supplying to cathode gas passage, the cathode feeder have to
Air inlet side is passed through the first working condition of cathode reaction gas and is passed through the second working condition of cathode reaction gas to exhaust side.
The beneficial effect is that: cathode feeder has the first working condition that cathode reaction gas is passed through to air inlet side
The reaction gas in cathode gas passage can be made to flow to hair with the second working condition for being passed through cathode reaction gas to exhaust side
Raw to change, after long-term reduction reaction, the surface of exchange membrane can generate the product water of reduction reaction, and moisture makes exchange membrane
It is wet, but on the one hand the air-flow for being proximate to entrance can take away the moisture close to entrance with air-flow, on the other hand can will lean on
The moisture of nearly entrance is pushed to exit, and accumulation has a large amount of moisture at mouthpiece, and exchange film surface is made to form a part of film
The phenomenon that dry another part water logging, influences the property of exchange membrane.And air-flow can moisturize after reversed in the part that film is done,
Portion of water is taken away in the part of original water logging, keeps the moisture distribution for exchanging film surface more uniform, ensure that exchange membrane
The activity of interior catalyst improves the efficiency of the energy conversion of fuel cell to make fuel cell be in preferable working condition
And its service life, it is directly controlled in cathode gas passage Circumscribed structure, is not interfered with cathode reaction gas at it
In reaction process, ensure that fuel cell powered stability and safety.
Technical solution 2: on the basis of technical solution 1, the cathode reaction gas that the cathode feeder provides flows
It is oriented parallel to exchange membrane.
The beneficial effect is that: the flow direction of cathode reaction gas is arranged in parallel to exchange membrane, can guarantee yin
Pole reaction gas is smaller in the resistance that cathode gas passage is subject to, and improves the working efficiency of fuel cell.
Technical solution 3: on the basis of technical solution 1, cathode feeder includes for connecting air inlet side and gas source
First air inlet pipeline, the second air inlet pipeline for connecting exhaust side and gas source, and it is respectively used to the first air inlet pipeline of control
With the first air intake control valve and the second air intake control valve of the second air inlet pipeline on-off.
The beneficial effect is that: directly cathode gas passage is entered for cathode reaction gas to become using two pipelines
It is interior, two inlet channels are directly formd, can be realized the function of commutation, and the two is not associated with, stable working state, knot
Structure is relatively easy, is easy to technical staff and realizes in fuel cell external.
Technical solution 4: on the basis of technical solution 3, the inlet end of first air inlet pipeline and the second air inlet pipeline
It is interconnected, the junction of the first air inlet pipeline and the second air inlet pipeline is equipped with the interface for connecting with gas source.
The beneficial effect is that: the first air inlet pipeline and the second air inlet pipeline be can be integrated into formula structure, are convenient for technology people
Member's processing and manufacturing, while increasing control valve, can be realized using unitary tubes and realize on-off, and efficiency is higher and reliability
By force.
Technical solution 5: on the basis of technical solution 3 or 4, first air inlet pipeline and the second air inlet pipeline are equipped with
Check valve.
The beneficial effect is that: it is provided with check valve on the first air inlet pipeline and the second air inlet pipeline, can be increased anti-
The only safety that reaction gas is flow backwards, improves the reliability of device.
Technical solution 6: on the basis of technical solution 1, cathode feeder further includes the first row for being connected to air inlet side
Air pipe, the second exhaust pipeline for being connected to exhaust side, and it is respectively used to control first exhaust pipeline and second exhaust pipeline
The first exhaust control valve and second exhaust control valve of on-off.
The beneficial effect is that: first as exhaust passage is provided on the first air inlet pipeline and the second air inlet pipeline
Gas exhaust piping and second exhaust pipeline, convenient for controlling reaction gas, if having the gas of pollution that can carry out discharge
Collection processing increases exhaust pipe and improves if can be collected cycling and reutilization for hydrogen or this innocuous gas of oxygen
Environment friendly.
Technical solution 7: on the basis of technical solution 6, the exhaust end of the first exhaust pipeline and second exhaust pipeline
It is interconnected, the junction of first exhaust pipeline and second exhaust pipeline is equipped with common exhaust port.
The beneficial effect is that: first exhaust pipeline and second exhaust pipeline be can be integrated into formula structure, are convenient for technology people
Member's processing and manufacturing, while increasing control valve, can be realized using unitary tubes and realize on-off, and efficiency is higher and reliability
By force.
Technical solution 8: on the basis of technical solution 3 or 6, the air intake control valve and gas exhausting valve are solenoid valve.
The beneficial effect is that: solenoid valve is used, driving force is small, realizes control convenient for technical staff, is also beneficial to control
Structure automation processed improves the working efficiency of fuel cell.
To achieve the above object, the exchange water content of membrane control method of fuel cell uses following technical side in the present invention
Case:
Technical solution 1: the exchange water content of membrane control method of fuel cell, this method are in fuel battery negative pole gas passage
Air inlet side and exhaust side alternately supply, including cathode reaction gas is passed through in the cathode gas passage of exchange membrane cathode side
Step further includes the steps that for gas source connecting with the air inlet and air outlet of cathode gas passage in turn.
Technical solution 2: on the basis of technical solution 1, air inlet side is connected with the first air inlet pipe for connecting with gas source
Road, exhaust side are connected with the second air inlet pipeline for connecting with gas source, distinguish on the first air inlet pipeline and the second air inlet pipeline
Equipped with the first air intake control valve and the second air intake control valve, alternately gas supply be by alternately open first air intake control valve and
Second air intake control valve is realized.
Technical solution 3: on the basis of technical solution 1 or 2, supplying and supply in exhaust side in air inlet side is according to the time
Period switches over.
Technical solution 4: on the basis of technical solution 1, air inlet side is connected with first exhaust pipeline, and exhaust side is connected with
Two gas exhaust pipings, first exhaust pipeline and second exhaust pipe road are respectively equipped with first exhaust control valve and second exhaust control
Valve, first exhaust control valve is closed when the first air intake control valve is opened, second exhaust control valve is opened, and the second air intake control valve is beaten
First exhaust control valve is opened when opening, second exhaust control valve is closed.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the first embodiment of the cathode air supply system of fuel cell in the present invention；
Fig. 2 is positive air inlet schematic diagram in cathode air supply system shown in FIG. 1；
Fig. 3 is reversed air inlet schematic diagram in cathode air supply system shown in FIG. 1；
Fig. 4 is the structural schematic diagram of second of embodiment of the cathode air supply system of fuel cell in the present invention.
In figure: 1. gas sources；2. positive inlet channel；21. positive air intake control valve；22. positive breather check valve；23. just
To gas exhausting valve；24. positive exhaust passage；3. reversed inlet channel；31. reversed air intake control valve；32. reversed air inlet is unidirectional
Valve；33. reversed gas exhausting valve；34. reversed exhaust passage；4. exhaust side；5. air inlet side；6. pile；7. solenoid directional control valve.
Specific embodiment
It as shown in Figure 1 to Figure 3, is the first embodiment of the cathode air supply system of fuel cell in the present invention, wherein wrapping
The internal pile 6 for being equipped with exchange membrane is included, pile 6 carries out energy conversion on the surface of exchange membrane for reaction gas and provides space,
In the two sides of exchange membrane, be respectively equipped with two spaces as anode gas passages and cathode gas passage, anode reaction gas and
In the two sides of exchange membrane redox chemistry reaction can occur for cathode reaction gas.In this example, cathode gas passage with
Anode gas passages are arranged in parallel up and down, and exchange membrane is arranged between cathode gas passage and anode gas passages, in cathode gas
The promising exchange membrane of the external connection in body channel provides the cathode feeder of cathode reaction gas, and the device has to air inlet
Side is passed through the first working condition of cathode reaction gas and is passed through the second working condition of cathode reaction gas to exhaust side, described
The first working condition be exactly that cathode reaction gas forward direction is passed through to the state of cathode gas passage, the second working condition is exactly to say
Cathode reaction gas is reversely passed through the state of cathode gas passage.
Air inlet side 5 and gas side 4 out in the both ends of cathode gas passage setting interface channel, by cathode feeder,
Air inlet side 5 can be used as the air inlet that cathode reaction gas enters in cathode gas passage, and gas side 4 can also be used as cathode out
Reaction gas enters the air inlet in cathode gas passage.Gas source 1 is connected with the air inlet pipe of a three-port structure, respectively with
Total air inlet that gas source 1 connects and from the separated positive inlet channel 2 and second channel as first passage of total air inlet
Reversed inlet channel 3, wherein positive inlet channel 2 is connected to the air inlet side 5 of pile 6, reversed inlet channel 3 goes out with pile 6
Gas side 4 is connected to, and be provided in positive inlet channel 2 and reversed inlet channel 3 respectively control gas path on-off it is positive into
Gas control valve 21, reversed air intake control valve 31 and the positive breather check valve 22, the reversed air intake control valve that control airintake direction
32.Wherein, in positive inlet channel 2, positive breather check valve 22 limits air-flow and blows back into gas source 1 from air inlet side 5,
In reversed inlet channel 3, reversed breather check valve 32 limits air-flow and blows back into gas source 1 from gas side 4 out.
The reversed exhaust passage 34 that branch is formed with air inlet side 5, energy are extended at positive inlet channel 2 and air inlet side 5
It is enough to form complete gas circulation path with reversed inlet channel 3.It is extended with and goes out at reversed inlet channel 3 and gas side 4 out
Gas side 4 forms the positive exhaust passage 24 of branch, can form complete gas circulation path with positive inlet channel 2.It is positive
Exhaust passage 24 is an integral structure with reversed exhaust passage 34, shares an exhaust outlet being in communication with the outside.Air inlet side 5 with
It is equipped with the reversed gas exhausting valve 33 for controlling reversed 34 on-off of exhaust passage between reversed exhaust passage 34, in gas side 4 out and just
To the positive gas exhausting valve 23 for being equipped with control 24 on-off of positive exhaust passage between exhaust passage 24.Above-mentioned positive air inlet is logical
Road 2, reversed inlet channel 3 and positive exhaust passage 24, reversed exhaust passage 34 are an integral structure, and form a mouth word
Type gas circuit frame, and the two sides of frame are set to total inlet end and total outlet side, the connection of pile 6 of fuel cell is arranged in mouth
Among font gas circuit frame.
As shown in Fig. 2, structural schematic diagram when being positive air inlet, when gas source 1 is passed through cathode reaction gas to pile 6, yin
Pole reaction gas is flowed with the direction for being parallel to exchange membrane.Cathode reaction gas in gas source 1 enters three by moistening
In logical structure, the air inlet in a manner of positive is selected at this time, and positive air intake control valve 21 is in the open state, and reversed air inlet control
Valve 31 is in close state, and cathode reaction gas can only flow from positive air intake control valve 21 to pile 6.Cathode reaction gas
After positive air intake control valve 21 and positive breather check valve 22, a part is entered in air inlet side 5 by circuit, and another
Part is moved to reversed exhaust passage 34, and reversed gas exhausting valve 33 is closed at this time, and cathode reaction gas can not pass through, can only
It turns back and enters at air inlet side 5, converge with the cathode reaction gas entered directly at air inlet side 5, and the cathode in pile 6
Reduction reaction occurs on the surface of exchange membrane in gas passage, produces by-product water, by-product water can be on the surface of exchange membrane
Keep it wet, cathode reaction gas is flowed out from gas side 4 out by cathode gas passage, and formed here point of cathode reaction gas
Branch, a part limit cathode reaction gas and enter gas source 1 to flowing at reversed inlet channel 3, reversed breather check valve 32
Interior, another part flows downward, by the positive gas exhausting valve 23 of unlatching, by positive exhaust passage 24, due to reversely arranging
The closing of gas control valve 33, cathode reaction gas can only be flowed out from outlet side.
When cathode reaction gas carries out reduction reaction, water is produced on the surface of exchange membrane, after carrying out a period of time,
It is larger close to gas flow rate at air inlet side 5, take away the moisture for exchanging film surface at air inlet side 5 by gas, separately
One side cathode reaction gas drives the moisture for exchanging film surface at air inlet side 5 to flowing at gas side 4 out, makes close to outlet
Exchange membrane surface moisture aggregation at side 4.Exchange film surface at air inlet side 5 will appear film and do phenomenon, and close to outlet
Exchange film surface at side 4, which will appear, floods phenomenon, and moisture is unevenly distributed on exchange membrane, has seriously affected the work of exchange membrane
Make property, reduce the energy conversion efficiency of exchange film surface, needs cathode reaction gas flowing to change at this time, friendship is controlled with this
Change the water content of film surface.
As shown in figure 3, structural schematic diagram when being reversed air inlet, with above-mentioned positive airintake direction on the contrary, cathode reaction gas
By reversed inlet channel 3 and reversed exhaust passage 34, the cathode gas passage in pile 6, the cathode of reverse flow are passed through
The moisture distribution of the exchange film surface when being in forward flow is adjusted by reaction gas, and the cathode at gas side 4 out is anti-
It answers gas that will take away a part of moisture for being gathered in exchange film surface, while pushing portion of water at air inlet side 5
Film surface is exchanged, keeps moisture more uniform in the distribution of the surface of exchange membrane.
Technical staff, in the reverse ventilation for carrying out same time, makes to hand over after carrying out the positive ventilation in certain period of time
The surface moisture for changing film is in a uniform state.
As shown in figure 4, for the embodiment of second of embodiment of the cathode air supply system of fuel cell in the present invention, with
The first above-mentioned embodiment the difference is that, solenoid electric valve 7 is provided at gas source 1, solenoid electric valve 7 is connected with one
A complete access, and directly pile 6 is connected in access, cathode reaction gas is realized by control solenoid electric valve 7
Body passes through positive inlet channel 2 and enters in cathode gas passage, is discharged from reversed inlet channel 3, or pass through reversed air inlet
Channel 3 enters in cathode gas passage, is discharged from positive inlet channel 2, is based on such structure, no longer setting individually exhaust
Arrangement space has been saved in channel.
In other embodiments, the forward loop being made of positive inlet channel and positive exhaust passage, by reversed air inlet
The return circuit in channel and reversed exhaust passage composition, may be replaced by other forms, by forward loop and return circuit point
It opens up and is set to individual circuit, no longer setting is an integral structure, and only relies on the reversal valve that is arranged at gas source to adjust cathode
The air inlet circuit of reversed gas, successively realizing by changing gas flow is evenly arranged the surface moisture of exchange membrane.
In other embodiments, exhaust outlet can be respectively set in positive exhaust passage and reversed exhaust passage, no longer share
One exhaust outlet.
In other embodiments, first passage and second channel may be replaced by other forms, such as directly in pile
In first interface and second interface at the individual gas source of setting, and be provided at gas source control first passage and second logical
The control valve of road on-off.
The embodiment of the exchange water content of membrane control method of fuel cell, this method is in fuel battery negative pole gas passage
Air inlet side and exhaust side alternately supply.Including cathode reaction gas is passed through in the cathode gas passage of exchange membrane cathode side
The step of, further include the steps that for gas source connecting with the air inlet and air outlet of cathode gas passage in turn.
The structure of positive air inlet and reversed air inlet as shown in Figures 2 and 3, this method, which is included in air inlet side and is connected with, to be used for
The first air inlet pipeline connecting with gas source, exhaust side are connected with the second air inlet pipeline for connecting with gas source, the first air inlet pipe
The first air intake control valve and the second air intake control valve are respectively equipped on road and the second air inlet pipeline, alternately gas supply is by alternately opening
It opens first air intake control valve and the second air intake control valve is realized.
Wherein supplying and supply in exhaust side in air inlet side was switched over according to the time cycle, and technical staff can be set
One period T accordingly controls air inlet side gas supply or exhaust side gas supply using period T as cycle period.
This method further includes being connected with first exhaust pipeline in air inlet side, and exhaust side is connected with second exhaust pipeline, and first
Gas exhaust piping and second exhaust pipe road are respectively equipped with first exhaust control valve and second exhaust control valve, the first air intake control valve
First exhaust control valve is closed when opening, second exhaust control valve is opened, and first exhaust controls when the second air intake control valve is opened
Valve is opened, second exhaust control valve is closed.
Circuit is formed in different air inlet pipelines and gas exhaust piping, and is provided with control different circuit in different circuits
The control valve of on-off successively realizes that reaction gas can change different flow directions from inlet, so that reaction gas is able to drive
The moisture movement that film surface generates is exchanged, so that the purpose that exchange membrane surface moisture is evenly distributed.
Claims (10)
- It is equipped with 1. the cathode air supply system of fuel cell, including pile, in pile and to be chemically reacted for cathode reaction gas Exchange membrane, exchange membrane side are equipped with cathode gas passage, and the cathode gas passage has air inlet side and exhaust side, cathode gas supply System further includes the cathode feeder for supplying to cathode gas passage, it is characterised in that: the cathode feeder tool Oriented air inlet side is passed through the first working condition of cathode reaction gas and is passed through the second work of cathode reaction gas to exhaust side State.
- 2. cathode air supply system according to claim 1, it is characterised in that: the cathode that the cathode feeder provides is anti- Gas flow direction is answered to be parallel to exchange membrane.
- 3. cathode air supply system according to claim 1, it is characterised in that: cathode feeder includes for connecting air inlet First air inlet pipeline of side and gas source, the second air inlet pipeline for connecting exhaust side and gas source, and it is respectively used to control The first air intake control valve and the second air intake control valve of one air inlet pipeline and the second air inlet pipeline on-off.
- 4. cathode air supply system according to claim 3, it is characterised in that: first air inlet pipeline and the second air inlet pipe The inlet end on road is interconnected, and the junction of the first air inlet pipeline and the second air inlet pipeline is equipped with to be connect for what is connect with gas source Mouthful.
- 5. cathode air supply system according to claim 3 or 4, it is characterised in that: first air inlet pipeline and second into Air pipe is equipped with check valve.
- 6. cathode air supply system according to claim 1, it is characterised in that: cathode feeder further includes being connected to air inlet The first exhaust pipeline of side, the second exhaust pipeline for being connected to exhaust side, and it is respectively used to control first exhaust pipeline and the The first exhaust control valve and second exhaust control valve of two gas exhaust piping on-off.
- 7. the exchange water content of membrane control method of fuel cell, it is characterised in that: this method is logical in fuel battery negative pole gas The air inlet side and exhaust side in road alternately supply, the cathode gas passage including cathode reaction gas being passed through exchange membrane cathode side Interior step further includes the steps that for gas source connecting with the air inlet and air outlet of cathode gas passage in turn.
- 8. the exchange water content of membrane control method of fuel cell according to claim 7, it is characterised in that: air inlet side connection There is the first air inlet pipeline for connecting with gas source, exhaust side is connected with the second air inlet pipeline for connecting with gas source, and first The first air intake control valve and the second air intake control valve are respectively equipped on air inlet pipeline and the second air inlet pipeline, alternately gas supply is to pass through Alternating opens first air intake control valve and the second air intake control valve is realized.
- 9. the exchange water content of membrane control method of fuel cell according to claim 7 or 8, it is characterised in that: in air inlet Side supplies and in exhaust side gas supply is switched over according to the time cycle.
- 10. the exchange water content of membrane control method of fuel cell according to claim 7, it is characterised in that: air inlet side connects It is connected to first exhaust pipeline, exhaust side is connected with second exhaust pipeline, and first exhaust pipeline and second exhaust pipe road are set respectively There are first exhaust control valve and second exhaust control valve, the closing of first exhaust control valve, second when the first air intake control valve is opened Gas exhausting valve is opened, and first exhaust control valve is opened when the second air intake control valve is opened, second exhaust control valve is closed.
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| CN201711303451.2A CN109904492A (en) | 2017-12-11 | 2017-12-11 | The exchange water content of membrane control method and cathode air supply system of fuel cell |
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| CN201711303451.2A CN109904492A (en) | 2017-12-11 | 2017-12-11 | The exchange water content of membrane control method and cathode air supply system of fuel cell |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116646556A (en) * | 2023-06-08 | 2023-08-25 | 昆明理工大学 | Air inlet and exhaust system of air-cooled cathode open type proton exchange membrane fuel cell and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060134474A1 (en) * | 2004-12-22 | 2006-06-22 | Hydrogenics Corporation | Fuel cell humidification system |
| US20100190078A1 (en) * | 2009-01-26 | 2010-07-29 | Gm Global Technology Operations, Inc. | Shutdown strategy for enhanced water management |
| CN207800763U (en) * | 2017-12-11 | 2018-08-31 | 郑州宇通客车股份有限公司 | The cathode air supply system of fuel cell |
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2017
- 2017-12-11 CN CN201711303451.2A patent/CN109904492A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060134474A1 (en) * | 2004-12-22 | 2006-06-22 | Hydrogenics Corporation | Fuel cell humidification system |
| US20100190078A1 (en) * | 2009-01-26 | 2010-07-29 | Gm Global Technology Operations, Inc. | Shutdown strategy for enhanced water management |
| CN207800763U (en) * | 2017-12-11 | 2018-08-31 | 郑州宇通客车股份有限公司 | The cathode air supply system of fuel cell |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116646556A (en) * | 2023-06-08 | 2023-08-25 | 昆明理工大学 | Air inlet and exhaust system of air-cooled cathode open type proton exchange membrane fuel cell and control method |
| CN116646556B (en) * | 2023-06-08 | 2024-04-30 | 昆明理工大学 | Air inlet and exhaust system of air-cooled cathode open type proton exchange membrane fuel cell and control method |
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