CN109216736A - Fuel cell multi-mode switching anode pressure pulsation water washes away control system - Google Patents
Fuel cell multi-mode switching anode pressure pulsation water washes away control system Download PDFInfo
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- CN109216736A CN109216736A CN201811116407.5A CN201811116407A CN109216736A CN 109216736 A CN109216736 A CN 109216736A CN 201811116407 A CN201811116407 A CN 201811116407A CN 109216736 A CN109216736 A CN 109216736A
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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
- H01M8/04783—Pressure differences, e.g. between anode and cathode
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
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- 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 present invention relates to fuel cell multi-mode switching anode pressure pulsation water to wash away control system, belongs to field of fuel cell technology.This method technical point are as follows: (1) dynamic regulation washes away pressure difference for fuel cell pile anode, realizes optimal anode water scouring effect；(2) direction that dynamic adjustment anode of fuel cell washes away, realizes optimal anode flow channel water distribution；(3) anode is closed, and realizes the anode hydrogen circulation of zero hydrogen gas emission effect.Optimal anode of fuel cell water scouring effect can be achieved in the present invention, reduce the pressure oscillation of anode of fuel cell, it avoids draining voltage fluctuation caused by the pressure drop in control because of conventional anode, while anode water distribution in pile can be optimized to improve the uniformity of fuel cell operating voltage.
Description
Technical field
The invention belongs to field of fuel cell technology, are related to fuel cell multi-mode switching anode pressure pulsation water and wash away control
System processed.
Background technique
When operation of fuel cells, hydrogen generates hydrogen ion in anode and passes through proton exchange membrane, and then in cathode and oxygen
Reaction generates water, and the water that cathode generates can reversely be diffused into anode because of concentration difference, this will lead to pile anode internal water accumulation increase and
Electrode water logging, to hinder hydrogen to transmit, therefore pile anode water management seems extremely important.Traditional anode water management is general
Using it is intermittent it is open unidirectionally wash away mode anode ponding be discharged, but traditional mode will lead to more hydrogen waste,
Hydrogen utilization ratio is reduced, also can not effectively avoid monomer voltage caused by the inhomogeneities because of anode water distribution uneven, while
Can when washing away anode pressure fluctuate it is excessive due to lead to the larger fluctuation of pile voltage.The anode totally enclosed type hydrogen that the present invention designs
The two-way supply system of gas can show the pressure difference of two pressure reducing valves of dynamic regulation according to the variation of actual condition and Performance data,
To keep that there is optimal hydrogen overbottom pressure in pile anode flow channel when washing away to maintain density of hydrogen, when reducing because washing away
Fuel battery voltage caused by hydrogen pressure drop is die-offed, while using monomer operating voltage uniformity as index, and dynamic changes gas supply side
To realize that the switching in direction is washed away in hydrogen supply direction and anode water, improvement anode water distribution improves pile monomer work electricity
The homogeneity of pressure, to well solve problems possessed by conventional anode water flush mode.
Summary of the invention
In view of this, the purpose of the present invention is to provide fuel cell multi-mode switching anode pressure pulsation water to wash away control
System washes away fuel cell pile using the fluctuation pressure that fuel battery inside generates, and is changed by triple valve and fired
Expect battery hydrogen supplier to that realizes fuel cell pile washes away direction switching.
In order to achieve the above objectives, the invention provides the following technical scheme:
The multi-mode switching anode pressure pulsation water of fuel cell washes away control system, including fuel cell, hydrogen gas tank, height
Voltage control pressure reducing valve, low-pressure electric controlled pressure reducing valve, two-position three-way valve I, two-position three-way valve II, solenoid valve and surge tank；
Wherein, the output end pressure of high-pressure electric control pressure reducing valve is constant, and the output end pressure of low-pressure electric controlled pressure reducing valve can be online
It adjusts；Three ports of two-position three-way valve I are respectively 1,2,3, and three ports of two-position three-way valve II are respectively 4,5,6；
The hydrogen gas tank is respectively connected to high-pressure electric control pressure reducing valve and low-pressure electric controlled pressure reducing valve by pipeline, low-pressure electric controlled to subtract
For pressure valve by piping connection to surge tank, surge tank is respectively connected to port 2 and port 5 by pipeline；Port 3 and port 4 are logical
It crosses pipeline while being connected to fuel cell；High-pressure electric control pressure reducing valve is respectively connected to port 1 after passing through piping connection to solenoid valve
With port 6；Port 1 and port 6 pass through pipeline intercommunication.
Further, this method generates the pressure difference with high-pressure air feed using the method for fuel cell consumption hydrogen, reaches
Fuel cell pile is washed away, it is main to be changed by the switch gap and duration of control solenoid valve, two-position three-way valve
Fuel cell hydrogen supplies the output pressure in direction, low-pressure electric controlled pressure reducing valve, and application fuzzy theory realizes three kinds of operating modes
Switching and hydrogen pressure difference control, realize fuel cell pile washes away direction switching, thus be optimal anode water punching
Brush control target.
Further, in the method, further include following basis:
(1) by the variation of acquisition output voltage, output voltage change rate and monomer voltage uniformity feedback in Fuzzy Control
Device processed, by adjusting washing away the duration, washing away interval, wash away direction and wash away pressure difference and preferably wash away effect to reach
Fruit shows as good monomer voltage uniformity, while maintaining Performance data more stable during washing away, and shows output voltage
Variation and change rate；
(2) fuel cell pile monomer voltage uniform distribution situation, decision wash away whether direction changes；
(3) size and the variation of monomer voltage uniformity are changed for judging quota, different low-pressure electric controlled with output voltage
The calibration of fuel battery performance and scouring effect is carried out under pressure reducing valve setting value, with optimal low-pressure electric controlled under the different operating conditions of determination
Pressure reducing valve pressure set points；
(4) after determining above-mentioned control parameter, flushing time and wash away interval then according to fuzzy rule determine.
Further, three kinds of operating modes are as follows:
Normal mode of operation: when fuel cell works normally, solenoid valve is kept it turning on, Hydrogen Vapor Pressure in fuel cell pile
Maintain high pressure；
Positive flush mode: closing solenoid valve, certain time is waited, to Hydrogen Vapor Pressure in fuel cell pile due to consumption
After dropping to low pressure valve output end pressure, it is again turned on solenoid valve, forward direction is carried out using the pressure difference generated at this time and washes away, to pile
After interior Hydrogen Vapor Pressure recovery high pressure and enter normal mode of operation；
Backward erosion mode: change the operating position of high-pressure electric control pressure reducing valve and low-pressure electric controlled pressure reducing valve first, to change
Become hydrogen flow direction, is then shut off solenoid valve, is reduced to low-pressure electric controlled pressure reducing valve to set to Hydrogen Vapor Pressure in fuel cell pile
After definite value, it is again turned on solenoid valve, backward erosion is carried out using pressure difference at this time, then restores two-position three-way valve I and two three
The operating position of port valve II makes gas flow direction restore the direction to before backward erosion, subsequently into normal mode of operation.
Further, three kinds of operating modes specifically:
Normal mode of operation: solenoid valve is kept it turned on, the unlatching station point of two-position three-way valve I and two-position three-way valve II
Not Wei 1-3 and 4-5, i.e. Mode I, loine pressure Phigh；
Positive flush mode: closing solenoid valve, and fuel cell persistently consumes hydrogen, at this time loine pressure be gradually reduced for
Plow, it is again turned on solenoid valve, certain pressure difference, size P will be generated in pipelinehigh-Plow, thus to fuel cell pile
Interior anode ponding is washed away, and normal mode of operation Mode I is then return to；
Backward erosion mode: the unlatching station for changing two-position three-way valve I and two-position three-way valve II respectively is 2-3 and 4-6, is closed
Solenoid valve is closed, hydrogen is persistently consumed, is gradually reduced loine pressure for Plow, it is again turned on solenoid valve, utilizes pressure difference Phigh-Plow
Ponding in pile is washed away, two-position three-way valve I and two-position three-way valve II are switched back into 1-3 and 4-5 respectively later, then
Return to normal mode of operation.
The beneficial effects of the present invention are:
1, the application of two-position three-way valve greatlies simplify the connection of hydrogen supply line, can be realized pair by pattern switching
The two-way of anode ponding is washed away in fuel cell pile, improves the uniform situation of water distribution of fuel cell, and it is equal to improve monomer voltage
Even property；
2, by dynamic regulation low-pressure relief valve pressure set points, voltage caused by reducing because of hydrogen pressure drop during washing away
Decline；
3, the strong robustness of Fuzzy control system, interference and influence very little of the Parameters variation to control effect, are especially suitable for
In the control of non-linear, time-varying and dead-time system.
4, completely enclosed hydrogen supply line improves the utilization rate of hydrogen, really realizes the zero-emission and efficiently of hydrogen
It utilizes.
5, collection of the surge tank for the anode ponding of discharge, can not only remove extra anode ponding, but also can be to hydrogen
Gas plays certain humidifying effect.
Detailed description of the invention
In order to keep the purpose of the present invention, technical scheme and beneficial effects clearer, the present invention provides following attached drawing and carries out
Illustrate:
Fig. 1 is the operating mode of system of the invention；
Fig. 2 is pipeline Hydrogen Vapor Pressure variation diagram of the invention；
Fig. 3 is fuzzy control thinking block diagram of the invention.
Specific embodiment
Below in conjunction with attached drawing, a preferred embodiment of the present invention will be described in detail.
The present invention be directed to the new methods that the multi-mode of closed-type fuel cell water management system washes away control, utilize fuel
The fluctuation pressure that inside battery generates washes away fuel cell pile, and changes fuel cell hydrogen supply by triple valve
Direction, that realizes fuel cell pile washes away direction switching.
The present invention mainly washes away control system by the multi-mode switching anode pressure pulsation water of fuel cell, and the system is main
Including fuel cell, hydrogen gas tank, high-pressure electric control pressure reducing valve, low-pressure electric controlled pressure reducing valve, two-position three-way valve I, two-position three-way valve II, electricity
Magnet valve surge tank and cooling fan；As shown in Figure 1.The two electronic control pressure reducing valves used in design: one is constant output end
The high pressure valve of pressure value and output end pressure can on-line control low pressure valve.Two groups of two-position three-way valves, solenoid valve and one
Surge tank is built by the hardware that piping connection appropriate completes the invention.By the switch gap of optimal control solenoid valve and
Duration, hydrogen wash away the output pressure in direction and low-pressure end electronic control pressure reducing valve, and application fuzzy theory realizes three kinds of works
The switching of operation mode and the control of hydrogen pressure difference, to realize that optimal anode water washes away control.
Normal mode of operation: when fuel cell works normally, solenoid valve is kept it turning on, and Hydrogen Vapor Pressure remains high in pile
Pressure；
Positive flush mode: solenoid valve is closed, a bit of time is waited, is dropped to Hydrogen Vapor Pressure in pile because of consumption
After low pressure valve output end pressure, it is again turned on solenoid valve, forward direction is carried out using the pressure difference generated at this time and washes away, to hydrogen in pile
After pressure recovery high pressure and enter normal mode of operation；
Backward erosion mode: it is then closed to change hydrogen flow direction the operating position for changing two triple valves first
Solenoid valve is closed, after Hydrogen Vapor Pressure in pile is reduced to low-pressure relief valve setting value, is again turned on solenoid valve, utilizes pressure at this time
Difference carries out backward erosion, then restores triple valve operating position, gas flow direction is made to restore the direction to before backward erosion,
Subsequently into normal mode of operation.
Fig. 2 is pipeline Hydrogen Vapor Pressure variation diagram of the invention.
To realize the above scouring effect, as shown in figure 3, control thinking of the invention is as follows:
1, this anode water management multi-mode washes away control system, passes through the variation of acquisition output voltage, output voltage change rate
And monomer voltage uniformity feedback is in fuzzy controller, by adjusting wash away the duration, wash away interval, wash away direction and
Pressure difference is washed away to reach better scouring effect (showing as good monomer voltage uniformity), while maintaining to wash away period more
Stable Performance data (showing output voltage variation and change rate)；
2, according to the uniform implementations of pile monomer voltage, decision washes away whether direction changes；
3, size and the variation of monomer voltage uniformity are changed for judging quota, in different low-pressure relief valves with output voltage
The calibration of fuel battery performance and scouring effect is carried out under setting value, with optimal low-pressure relief valve pressure under the different operating conditions of determination
Setting value；
4, after determining above-mentioned control parameter, flushing time with interval is washed away is determined according to fuzzy rule.
Operating mode of the invention are as follows:
(1) normal mode of operation: solenoid valve is kept it turned on, and the unlatching station of two triple valves is respectively 1-3 and 4-
5, i.e. Mode I, loine pressure Phigh；
(2) positive flush mode: solenoid valve is closed, fuel cell persistently consumes hydrogen, and loine pressure is gradually reduced at this time
For Plow, it is again turned on solenoid valve, certain pressure difference, size P will be generated in pipelinehigh-Plow, thus to the sun in pile
Pole ponding is washed away, and normal mode of operation Mode I is then return to；
(3) backward erosion mode: the unlatching station for changing two-position three-way valve respectively is 2-3 and 4-6, closes solenoid valve, holds
Continuous consumption hydrogen, is gradually reduced loine pressure for Plow, it is again turned on solenoid valve, utilizes pressure difference Phigh-PlowTo in pile
Ponding is washed away, and two two-position three-way valves are switched back into 1-3 and 4-5 respectively later, are then return to normal mode of operation.
Finally, it is stated that preferred embodiment above is only used to illustrate the technical scheme of the present invention and not to limit it, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (5)
1. fuel cell multi-mode switching anode pressure pulsation water washes away control system, it is characterised in that: the system includes fuel
Battery, hydrogen gas tank, high-pressure electric control pressure reducing valve, low-pressure electric controlled pressure reducing valve, two-position three-way valve I, two-position three-way valve II, solenoid valve and
Surge tank；
Wherein, the output end pressure of high-pressure electric control pressure reducing valve is constant, and the output end pressure of low-pressure electric controlled pressure reducing valve can on-line control；
Three ports of two-position three-way valve I are respectively 1,2,3, and three ports of two-position three-way valve II are respectively 4,5,6；
The hydrogen gas tank is respectively connected to high-pressure electric control pressure reducing valve and low-pressure electric controlled pressure reducing valve, low-pressure electric controlled pressure reducing valve by pipeline
By piping connection to surge tank, surge tank is respectively connected to port 2 and port 5 by pipeline；Port 3 and port 4 pass through pipe
Road is connected to fuel cell simultaneously；High-pressure electric control pressure reducing valve is respectively connected to port 1 and end after passing through piping connection to solenoid valve
Mouth 6；Port 1 and port 6 pass through pipeline intercommunication.
2. the fuel cell multi-mode switching anode pressure pulsation water based on system described in claim 1 washes away control method,
Be characterized in that: this method generates the pressure difference with high-pressure air feed using the method for fuel cell consumption hydrogen, reaches to fuel
Battery stack is washed away, main to change fuel electricity by the switch gap and duration of control solenoid valve, two-position three-way valve
Pond hydrogen supplies the output pressure in direction, low-pressure electric controlled pressure reducing valve, and application fuzzy theory realizes the switching of three kinds of operating modes
With the control of hydrogen pressure difference, that realizes fuel cell pile washes away direction switching, so that the anode water being optimal washes away control
Target.
3. fuel cell multi-mode switching anode pressure pulsation water according to claim 2 washes away control method, feature
It is: further includes following basis in the method:
(1) it is fed back by the variation of acquisition output voltage, output voltage change rate and monomer voltage uniformity in fuzzy controller,
By adjusting washing away the duration, washing away interval, wash away direction and wash away pressure difference to reach better scouring effect, show
For good monomer voltage uniformity, while maintaining Performance data more stable during washing away, show output voltage variation with
And change rate；
(2) fuel cell pile monomer voltage uniform distribution situation, decision wash away whether direction changes；
(3) size and the variation of monomer voltage uniformity are changed for judging quota, in different low-pressure electric controlled decompressions with output voltage
The calibration of fuel battery performance and scouring effect is carried out under valve setting value, with optimal low-pressure electric controlled decompression under the different operating conditions of determination
Valve pressure set points；
(4) after determining above-mentioned control parameter, flushing time and wash away interval then according to fuzzy rule determine.
4. fuel cell multi-mode switching anode pressure pulsation water according to claim 2 washes away control method, feature
It is: three kinds of operating modes are as follows:
Normal mode of operation: when fuel cell works normally, solenoid valve is kept it turning on, and Hydrogen Vapor Pressure maintains in fuel cell pile
High pressure；
Positive flush mode: closing solenoid valve, waits certain time, declines to Hydrogen Vapor Pressure in fuel cell pile because of consumption
To low pressure valve output end pressure, it is again turned on solenoid valve, forward direction is carried out using the pressure difference generated at this time and washes away, to hydrogen in pile
After atmospheric pressure recovery high pressure and enter normal mode of operation；
Backward erosion mode: change the operating position of high-pressure electric control pressure reducing valve and low-pressure electric controlled pressure reducing valve first, to change hydrogen
Flow of air direction, is then shut off solenoid valve, is reduced to low-pressure electric controlled pressure reducing valve setting value to Hydrogen Vapor Pressure in fuel cell pile
Afterwards, it is again turned on solenoid valve, backward erosion is carried out using pressure difference at this time, then restores two-position three-way valve I and two-position three-way valve
The operating position of II makes gas flow direction restore the direction to before backward erosion, subsequently into normal mode of operation.
5. fuel cell multi-mode switching anode pressure pulsation water according to claim 4 washes away control method, feature
It is: three kinds of operating modes specifically:
Normal mode of operation: solenoid valve is kept it turned on, and the unlatching station of two-position three-way valve I and two-position three-way valve II are respectively
1-3 and 4-5, i.e. Mode I, loine pressure Phigh；
Positive flush mode: closing solenoid valve, and fuel cell persistently consumes hydrogen, and loine pressure is gradually reduced as P at this timelow, then
Secondary opening solenoid valve, pipeline is interior will to generate certain pressure difference, size Phigh-Plow, thus to the sun in fuel cell pile
Pole ponding is washed away, and normal mode of operation Mode I is then return to；
Backward erosion mode: the unlatching station for changing two-position three-way valve I and two-position three-way valve II respectively is 2-3 and 4-6, closes electricity
Magnet valve persistently consumes hydrogen, is gradually reduced loine pressure for Plow, it is again turned on solenoid valve, utilizes pressure difference Phigh-PlowTo electricity
Ponding in heap is washed away, and two-position three-way valve I and two-position three-way valve II are switched back into 1-3 and 4-5 respectively later, are then return to
Normal mode of operation.
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| CN201811116407.5A CN109216736B (en) | 2018-09-25 | 2018-09-25 | Fuel cell multi-mode switching anode pressure pulsating water flushing control system |
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Cited By (6)
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| CN109950580A (en) * | 2019-04-22 | 2019-06-28 | 重庆大学 | The quick regulating system of low cost fuel cell heap anode working pressure |
| CN111430750A (en) * | 2020-04-02 | 2020-07-17 | 重庆大学 | Intelligent control system for anode pressure of fuel cell automobile stack |
| CN112349930A (en) * | 2020-11-27 | 2021-02-09 | 福建亚南电机有限公司 | Fuel cell system and anode control method |
| CN112820901A (en) * | 2020-12-31 | 2021-05-18 | 华中科技大学 | Method for solving water flooding problem of hydrogen-oxygen fuel cell in closed environment |
| CN113594493A (en) * | 2021-06-18 | 2021-11-02 | 东风汽车集团股份有限公司 | Control method and device for fuel cell cooling system and storage medium |
| 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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| CN109950580A (en) * | 2019-04-22 | 2019-06-28 | 重庆大学 | The quick regulating system of low cost fuel cell heap anode working pressure |
| CN109950580B (en) * | 2019-04-22 | 2022-02-11 | 重庆大学 | Low-cost fuel cell stack anode working pressure rapid regulating system |
| CN111430750A (en) * | 2020-04-02 | 2020-07-17 | 重庆大学 | Intelligent control system for anode pressure of fuel cell automobile stack |
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| CN113594493A (en) * | 2021-06-18 | 2021-11-02 | 东风汽车集团股份有限公司 | Control method and device for fuel cell cooling system and storage medium |
| CN113594493B (en) * | 2021-06-18 | 2022-06-03 | 东风汽车集团股份有限公司 | Control method and device for fuel cell cooling system and storage medium |
| 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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