CN109687000A - A kind of fuel cell system shuts down electric discharge device and method - Google Patents
A kind of fuel cell system shuts down electric discharge device and method Download PDFInfo
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- CN109687000A CN109687000A CN201910128242.1A CN201910128242A CN109687000A CN 109687000 A CN109687000 A CN 109687000A CN 201910128242 A CN201910128242 A CN 201910128242A CN 109687000 A CN109687000 A CN 109687000A
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- 239000000446 fuel Substances 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000001257 hydrogen Substances 0.000 claims abstract description 123
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 123
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 79
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 47
- 239000001301 oxygen Substances 0.000 claims abstract description 35
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 35
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 34
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 6
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract 2
- 229910001882 dioxygen Inorganic materials 0.000 claims abstract 2
- 239000007789 gas Substances 0.000 claims description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 239000004615 ingredient Substances 0.000 abstract 1
- 238000006555 catalytic reaction Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
- H01M8/04228—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells during shut-down
-
- 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
-
- 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
- H01M8/043—Processes for controlling fuel cells or fuel cell systems applied during specific periods
- H01M8/04303—Processes for controlling fuel cells or fuel cell systems applied during specific periods applied during shut-down
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0438—Pressure; Ambient pressure; Flow
- H01M8/04388—Pressure; Ambient pressure; Flow of anode reactants at the inlet or inside the fuel cell
-
- 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
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The present invention relates to a kind of fuel cell systems to shut down electric discharge device and method; the present invention is to shut down discharge regime in fuel cell system; a low current is loaded by the bus to fuel cell system pile; utilize the effect of circulating pump; forced circulation flowing is carried out to surplus air in air road, cooperates the sustainable supply of hydrogen road hydrogen, rapidly depletes pile air chamber, the oxygen gas component in system air circuit unit and pipeline in air; rich nitrogen environment is formed, reduces pile voltage quickly；The duration for loading low current simultaneously is judged according to pile voltage, the air road oxygen concentration that the duration that hydrogen is mended on the duration of circulating pump and hydrogen road is monitored according to oxygen concentration sensor is judged, guarantee that basic no oxygen ingredient penetrates into hydrogen chamber in pile cavity, reduces influence of the hydrogen road hydrogen-oxygen interface to pile service life when opening machine.
Description
Technical field
The present invention relates to fuel cell system technical fields, shut down electric discharge device more particularly, to a kind of fuel cell system
And method.
Background technique
When fuel cell system is shut down, pile average voltage is higher, and high potential has bigger damage to the service life of pile
Evil, the pile service life will effectively be extended by rapidly reducing pile voltage.
On startup, the air side blowing air of system, hydrogen gas side leads to hydrogen to fuel cell system, if hydrogen gas side has air
(oxygen) exists, hydrogen in the case where being continually fed into, hydrogen by anode flow field formed one flowing hydrogen/air (hydrogen/
Oxygen) interface, finally it is pushed to the outlet of pile.Hydrogen/sky (hydrogen oxygen) interface can make oxygen reduction reaction exist simultaneously in anode and
Cathode leads to the presence that cathode catalysis layer surface forms a very high current potential and anode has reverse current, to cathode catalysis layer
Cause very serious decaying.Equally, after fuel cell system shutdown, if there are also remain in pile, accessory and pipeline
Hydrogen and oxygen, due to the presence of concentration gradient, the oxygen of cathode side penetrates into anode-side by proton exchange membrane, can also deposit
At hydrogen/sky (hydrogen oxygen) interface, this be a comparison slowly but more permanent process, can also be caused to cathode catalysis layer
Decaying.The fuel cell system of the prior art there has been no can be avoided shut down after and pile anode side hydrogen/sky when being switched on next time
The method of the generation at (hydrogen oxygen) interface influences the service life of pile and the closure of whole system.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of fuel cell systems
Shut down electric discharge device and method.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of fuel cell system shuts down electric discharge device, including fuel cell pile, connect respectively with fuel cell pile
Air road, hydrogen road and the circulating pump being arranged between air road and hydrogen road, the air road includes sequentially connected
The sun of air filter, air flow meter, air inlet shutter, air compressor and humidifier, humidifier and fuel cell pile
Pole connection, the outlet of humidifier connect with air exhaust mechanism, the hydrogen road include with the cathode of fuel cell pile according to
The hydrogen of secondary connection enters heap pressure sensor and low pressure hydrogen supply device, and the hydrogen outlet of fuel cell pile is connected with hydrogen road row
Water exhaust gear, the junction that hydrogen enters the anode of heap pressure sensor and fuel cell pile are equipped with the first gas solenoid valve,
First gas solenoid valve connects circulating pump, and air compressor accesses circulating pump, hydrogen road row after being connect with third gas with solenoid valve
Water exhaust gear connects the second gas solenoid valve, and the second gas solenoid valve connects circulating pump, and the outlet of humidifier connects the 4th gas
It is connect with after solenoid valve with circulating pump.
Preferably, oxygen concentration sensor is equipped between the humidifier and fuel cell pile.
Preferably, the air exhaust mechanism includes the sequentially connected air back pressure valve in outlet, the air with humidifier
Last row pipe.
Preferably, the hydrogen road dewatering exhaust mechanism includes hydrogen the circulation path water segregator, hydrogen air passage drain valve and hydrogen
The hydrogen outlet of gas circuit exhaust valve, fuel cell pile connects hydrogen the circulation path water segregator, the side of hydrogen the circulation path water segregator
It being separately connected with hydrogen air passage drain valve, hydrogen road exhaust valve, the other side is connect with the second gas with solenoid valve, hydrogen air passage drain valve,
Hydrogen road exhaust valve is connect with air last row pipe.
Preferably, the circulating pump uses the adjustable electric circulating pump of revolving speed.
Preferably, the fuel cell pile is equipped with to detect the voltage of fuel cell pile, the voltage of electric current
Sensor, current sensor.
Preferably, intercooler is equipped between the air compressor and humidifier.
A kind of fuel cell system shutdown charging method, this method include the following steps:
Step 1: atmosphere enters fuel cell system by air filter, air flow meter detection enters fuel cell
The air mass flow of system, air compressor compress air to the pressure and flow of system needs；
Step 2: air compressor stops working, and air inlet shutter closes simultaneously with air back pressure valve before shutting down discharge process
It closes, the first gas solenoid valve, the second gas are closed with solenoid valve, and third gas solenoid valve and the 4th gas are opened with solenoid valve, air
Road forms enclosure space, and circulating pump is transferred to air road from hydrogen road；
Step 3: persistently filling into the hydrogen of certain pressure using low pressure hydrogen supply device according to actual requirement, hydrogen road is closed
Drain valve and hydrogen road exhaust valve, set the revolving speed of circulating pump；
Step 4: quickly to the low current of the bus load calibration of fuel cell pile, current value is supervised by current sensor
It surveys, pulls down the total voltage of fuel cell pile, shut down electric discharge and start；
Step 5: persistently filling into the hydrogen on hydrogen road, start circulating pump forced circulation air road at this time, by fuel cell electricity
Air circulation in heap, air compressor, intercooler, humidifier and pipeline is got up, and air road oxygen is rapidly depleted；
Step 6: monitoring pile total voltage value by voltage sensor, when triggering lower limit, stop electric current load；Lead to simultaneously
The concentration for the oxygen concentration sensor monitoring air road oxygen for crossing air road stops circulation when oxygen concentration drops to certain value
Pump and the work of low pressure hydrogen supply device；
Step 7: shutting down discharge regime terminates, and hydrogen penetrates into air road from hydrogen road after circulating pump stops working,
The nitrogen on air road penetrates into hydrogen road from air road.
Compared with prior art, the invention has the following advantages that
One, the present invention is before shutting down electric discharge and starting, by the opening and closing of 4 gas solenoid valves, by circulating pump from hydrogen
Gas the circulation path switchs to air circulation road；After shutting down electric discharge, then by the opening and closing of 4 gas solenoid valves, by circulating pump from
Air circulation road switchs to hydrogen the circulation path, and the present invention makes full use of the effect of circulating pump, after a shutdown, by accelerating pile voltage
Decrease speed quickly forms rich nitrogen environment, and anode surveys influence of the hydrogen sky interface to the service life when substantially avoiding starting next time；
Two, the present invention enters heap side equipped with pressure sensor in the hydrogen of fuel cell system, can be used as feedback quantity, control is mended
The pressure value for entering hydrogen is conducive to the control precision for improving Hydrogen Vapor Pressure.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that a kind of fuel cell system of the present invention shuts down electric discharge device；
Fig. 2 is the flow diagram that a kind of fuel cell system of the present invention shuts down charging method；
Shown in figure label:
1, air filter, 2, air main road flowmeter, 3, air inlet shutter, 4, air compressor, 5, intercooler, 6, increasing
Wet device, 7, oxygen concentration sensor, 8, fuel cell pile, 9, air back pressure valve, 10, air last row pipe, 11, hydrogen the circulation path point
Hydrophone, 12, hydrogen air passage drain valve, 13, hydrogen road exhaust valve, 14, hydrogen enter heap pressure sensor, 15, low pressure hydrogen supply device,
16, the first gas solenoid valve, the 17, second gas solenoid valve, 18, circulating pump, 19, third gas solenoid valve, the 20, the 4th gas electricity consumption
Magnet valve, 21, voltage sensor, 22, current sensor.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.Obviously, described embodiment is this
A part of the embodiment of invention, rather than whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, all should belong to the scope of protection of the invention.
As shown in Figure 1, the present invention relates to a kind of fuel cell systems to shut down electric discharge device, including air filter 1, air inlet
Air throttle 3, air compressor 4, humidifier 6, fuel cell pile 8, air back pressure valve 9, oxygen concentration sensor 7, circulating pump 18,
Hydrogen enters heap pressure sensor 14, low pressure hydrogen supply device 15 and four gas solenoid valves.
Air filter 1 is connect after connecting air flow meter 2 with air inlet shutter 3, and air inlet shutter 3 is mounted on air pressure
On contracting machine 4, air compressor 4 is connect by intercooler 5 with humidifier 6, and humidifier 6 is connect with the cathode of fuel cell pile 8.
Oxygen concentration sensor 7 is additionally provided between humidifier 6 and fuel cell pile 8.The anode of fuel cell pile 8 connects hydrogen supply machine
Structure, hydrogen supply mechanism include entering heap pressure sensor 14 and low pressure hydrogen supply with the sequentially connected hydrogen of the anode of fuel cell pile 8
Device 15.The hydrogen outlet of fuel cell pile 8 is connected with hydrogen the circulation path water segregator 11, and the one of hydrogen the circulation path water segregator 11
Side is separately connected with hydrogen air passage drain valve 12, hydrogen road exhaust valve 13.Hydrogen air passage drain valve 12, hydrogen road exhaust valve 13 and air
Last row pipe 10 connects, and humidifier 6 is connect with air last row pipe 10 by air back pressure valve 9.
The junction that hydrogen enters the anode of heap pressure sensor 14 and fuel cell pile 8 is equipped with the first gas solenoid valve
16, the first gas connects circulating pump 18 with solenoid valve 16；Air compressor 4 accesses circulating pump after connecting with third gas solenoid valve 19
18.The other side of hydrogen the circulation path water segregator 11 connects the second gas solenoid valve 17, and the second gas connects circulating pump with solenoid valve 17
18；It is connect after outlet connection the 4th gas solenoid valve 20 of humidifier 6 with circulating pump 18.Preferably, circulating pump 18 uses revolving speed
Adjustable electric circulating pump.
The invention further relates to a kind of fuel cell systems to shut down charging method, and this method is based on above-mentioned apparatus, such as Fig. 2 institute
Show, main flow are as follows:
Atmosphere enters fuel cell system by air filter 1, and air flow meter 2 can be measured into fuel cell system
Air mass flow, air compressor 4 compress air to system needs pressure and flow.Before shutting down discharge process, air pressure
Contracting machine 4 will stop working, and air inlet shutter 3 and air back pressure valve 9 simultaneously close off, the first gas solenoid valve 16 and the second gas electricity consumption
Magnet valve 17 is closed, and third gas solenoid valve 19 and the 4th gas solenoid valve 20 are opened, and air road forms a closed sky at this time
Between, circulating pump 18 is transferred to air road from hydrogen road.
Low pressure hydrogen supply device 15 persistently fills into the hydrogen that pressure is P, closes 12 He of hydrogen air passage drain valve according to policy mandates
Hydrogen road exhaust valve 13 sets the revolving speed RPM of circulating pump 18.Because there are oxygen and hydrogen for the cathode and anode of fuel cell pile 8
Gas, 8 voltage of fuel cell pile is higher at this time, quickly to the low current I of the bus load calibration of fuel cell pile 8, such as benefit
With electrical load devices carry out load low current (if on fuel-cell vehicle can by DC/DC load low current), current value by
Current sensor 22 monitors, and pulls down the total voltage of fuel cell pile 8, shuts down electric discharge and starts.
Hydrogen road hydrogen persistently fills into, and starts 18 forced circulation air road of circulating pump at this time, by fuel cell pile 8, sky
Air circulation in air compressor 4, intercooler 5, humidifier 6 and pipeline is got up, and air road oxygen rapidly depletes.
Pile total voltage value V is monitored by voltage sensor 21, when triggering lower limit, stops electric current load.Pass through sky simultaneously
The oxygen concentration sensor 7 of gas circuit monitors the concentration of air road oxygen, when oxygen concentration drops to certain value Φ, stops circulating pump
18 and low pressure hydrogen supply device 15 work.
As long as the cathode and anode of fuel cell pile 8 has oxygen and hydrogen, certain voltage, generally, fuel will be generated
The total voltage value V of battery stack 8 first triggers lower limit value, stops loading current, then when oxygen concentration drops to certain value Φ, circulation
Pump 18 stops working.
After circulating pump 18 stops working, shut down discharge regime terminate, at this time air this no oxygen of roadbed exist, hydrogen by
In the reason of the concentration gradient and pressure difference, air road will be penetrated into from hydrogen road；Original of the nitrogen on air road due to concentration gradient
Cause will penetrate into hydrogen road from air road.
The present invention is real by the switching of solenoid valve using the design for increasing by four gas solenoid valves and oxygen concentration sensor
Circulating pump is showed in the different ringings of hydrogen and air road.After fuel cell system shuts down electric discharge, by loading low current,
Quick pull-down pile high potential, while circulating pump is switched into air road from hydrogen road, in forced circulation pile and air pipe line
Air, using mend hydrogen strategy, rapidly deplete oxygen, form rich nitrogen environment on air road, avoid to the greatest extent hydrogen/sky (hydrogen/
Oxygen) interface generation, and then the service life of pile can be improved.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
The staff for being familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (8)
1. a kind of fuel cell system shuts down electric discharge device, which is characterized in that including fuel cell pile (8), respectively with fuel
Air road, hydrogen road and the circulating pump (18) being arranged between air road and hydrogen road of battery stack (8) connection, the sky
Gas circuit includes sequentially connected air filter (1), air flow meter (2), air inlet shutter (3), air compressor (4) and increases
Wet device (6), humidifier (6) are connect with the anode of fuel cell pile (8), and the outlet of humidifier (6) and air exhaust mechanism connect
Connect, the hydrogen road include enter with the sequentially connected hydrogen of cathode of fuel cell pile (8) heap pressure sensor (14) and
Low pressure hydrogen supply device (15), the hydrogen outlet of fuel cell pile (8) are connected with hydrogen road dewatering exhaust mechanism, and hydrogen enters stacking pressure
The junction of force snesor (14) and the anode of fuel cell pile (8) is equipped with the first gas solenoid valve (16), the first gas electricity consumption
Magnet valve (16) connects circulating pump (18), and air compressor (4) accesses circulating pump (18) after being connect with third gas with solenoid valve (19),
Hydrogen road dewatering exhaust mechanism connects the second gas with solenoid valve (17), and the second gas connects circulating pump (18) with solenoid valve (17), increases
The outlet of wet device (6) connects the 4th gas and is connect afterwards with circulating pump (18) with solenoid valve (20).
2. a kind of fuel cell system according to claim 1 shuts down electric discharge device, which is characterized in that the humidifier
(6) oxygen concentration sensor (7) are equipped between fuel cell pile (8).
3. a kind of fuel cell system according to claim 1 shuts down electric discharge device, which is characterized in that the air row
Mechanism of qi structure includes and the sequentially connected air back pressure valve (9) in the outlet of humidifier (6), air last row pipe (10).
4. a kind of fuel cell system according to claim 3 shuts down electric discharge device, which is characterized in that the hydrogen road
Dewatering exhaust mechanism includes hydrogen the circulation path water segregator (11), hydrogen air passage drain valve (12) and hydrogen road exhaust valve (13), fuel
The hydrogen outlet of battery stack (8) connects hydrogen the circulation path water segregator (11), the side of hydrogen the circulation path water segregator (11) and hydrogen
Air passage drain valve (12), hydrogen road exhaust valve (13) are separately connected, and the other side is connect with the second gas with solenoid valve (17), hydrogen road
Drain valve (12), hydrogen road exhaust valve (13) are connect with air last row pipe (10).
5. a kind of fuel cell system according to claim 1 shuts down electric discharge device, which is characterized in that the circulating pump
(18) the adjustable electric circulating pump of revolving speed is used.
6. a kind of fuel cell system according to claim 1 shuts down electric discharge device, which is characterized in that the fuel electricity
Pond pile (8) is equipped with to detect the voltage of fuel cell pile (8), voltage sensor (21), the current sensor of electric current
(22)。
7. a kind of fuel cell system according to claim 1 shuts down electric discharge device, which is characterized in that the air pressure
Intercooler (5) are equipped between contracting machine (4) and humidifier (6).
8. a kind of using a kind of described in any item shutdown electric discharge sides of fuel cell system shutdown electric discharge device claim 1-7
Method, which is characterized in that this method includes the following steps:
1) atmosphere enters fuel cell system by air filter (1), and air flow meter (2) detection enters fuel cell system
Air mass flow, air compressor (4) compress air to system needs pressure and flow；
2) before shutting down discharge process, air compressor (4) stops working, and air inlet shutter (3) closes simultaneously with air back pressure valve (9)
It closes, the first gas solenoid valve (16), the second gas solenoid valve (17) are closed, and third gas is with solenoid valve (19) and the 4th gas electromagnetism
Valve (20) is opened, and air road forms enclosure space, and circulating pump (18) is transferred to air road from hydrogen road；
3) according to actual requirement, the hydrogen of certain pressure is persistently filled into using low pressure hydrogen supply device (15), closes the draining of hydrogen road
Valve (12) and hydrogen road exhaust valve (13) set the revolving speed of circulating pump (18)；
4) quickly to the low current of the bus load calibration of fuel cell pile (8), current value is monitored by current sensor (22),
The total voltage of fuel cell pile (8) is pulled down, electric discharge is shut down and starts；
5) hydrogen on hydrogen road is persistently filled into, starts circulating pump (18) forced circulation air road at this time, by fuel cell pile
(8), the air circulation in air compressor (4), intercooler (5), humidifier (6) and pipeline is got up, and rapidly depletes air road oxygen
Gas；
6) pile total voltage value is monitored by voltage sensor (21), when triggering lower limit, stops electric current load；Pass through air simultaneously
The concentration of oxygen concentration sensor (7) the monitoring air road oxygen on road stops circulating pump when oxygen concentration drops to certain value
(18) it works with low pressure hydrogen supply device (15)；
7) after circulating pump (18) stops working, shutting down discharge regime terminates, and hydrogen penetrates into air road, air road from hydrogen road
Nitrogen penetrate into hydrogen road from air road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910128242.1A CN109687000B (en) | 2019-02-20 | 2019-02-20 | Shutdown discharging device and method for fuel cell system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910128242.1A CN109687000B (en) | 2019-02-20 | 2019-02-20 | Shutdown discharging device and method for fuel cell system |
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| Publication Number | Publication Date |
|---|---|
| CN109687000A true CN109687000A (en) | 2019-04-26 |
| CN109687000B CN109687000B (en) | 2023-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910128242.1A Active CN109687000B (en) | 2019-02-20 | 2019-02-20 | Shutdown discharging device and method for fuel cell system |
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| CN110299548A (en) * | 2019-06-17 | 2019-10-01 | 珠海格力电器股份有限公司 | Anode intermittent exhaust method of anode closed proton exchange membrane fuel cell |
| CN110380086A (en) * | 2019-08-09 | 2019-10-25 | 河南豫氢动力有限公司 | A kind of fuel cell auxiliary system and shut down cathode rapid purging method |
| CN110957506A (en) * | 2019-11-25 | 2020-04-03 | 中国第一汽车股份有限公司 | Fuel cell system and standby control method thereof |
| CN111129545A (en) * | 2019-12-28 | 2020-05-08 | 绍兴市上虞区理工高等研究院 | Vehicle fuel cell hydrogen supply circulation system and control method |
| CN111725542A (en) * | 2020-06-29 | 2020-09-29 | 潍柴动力股份有限公司 | Anode protection structure of hydrogen fuel cell and control method |
| CN112086668A (en) * | 2020-09-25 | 2020-12-15 | 南昌智能新能源汽车研究院 | Multiphase load changing method for starting and stopping fuel cell |
| CN112820908A (en) * | 2020-12-30 | 2021-05-18 | 武汉格罗夫氢能汽车有限公司 | Normal shutdown method for hydrogen fuel cell system |
| CN113224350A (en) * | 2021-05-19 | 2021-08-06 | 北京亿华通科技股份有限公司 | Fuel cell system and control method thereof |
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| CN113793951A (en) * | 2021-09-10 | 2021-12-14 | 中国第一汽车股份有限公司 | Fuel cell system and shutdown control method |
| CN114497647A (en) * | 2022-03-21 | 2022-05-13 | 北京亿华通科技股份有限公司 | Fuel cell shutdown diagnosis method and device |
| CN114628736A (en) * | 2020-12-14 | 2022-06-14 | 中国科学院大连化学物理研究所 | Liquid fuel electric pile system shutdown device and shutdown method |
| CN114792823A (en) * | 2022-04-24 | 2022-07-26 | 同济大学 | Fuel cell system and starting method thereof |
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| CN114792823B (en) * | 2022-04-24 | 2023-07-04 | 同济大学 | Fuel cell system and starting method thereof |
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