CN107195927A - A kind of gas pressure control system and method - Google Patents
A kind of gas pressure control system and method Download PDFInfo
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- CN107195927A CN107195927A CN201710407699.7A CN201710407699A CN107195927A CN 107195927 A CN107195927 A CN 107195927A CN 201710407699 A CN201710407699 A CN 201710407699A CN 107195927 A CN107195927 A CN 107195927A
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- back pressure
- opening angle
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04104—Regulation of differential pressures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04746—Pressure; Flow
- H01M8/04753—Pressure; Flow of fuel cell reactants
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—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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- 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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- Manufacturing & Machinery (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a kind of gas pressure control system and method, the gas pressure control system include fuel cell controller FCU and, first back pressure regulator and/or the second back pressure regulator, first back pressure regulator and/or the second back pressure regulator are connected with FCU, first back pressure regulator is installed at the air outlet slit of fuel cell pile, second back pressure regulator is installed at the hydrogen outlet of fuel cell pile, FCU is used to obtain the air pressure data at the air outlet slit of fuel cell pile and/or the Hydrogen Vapor Pressure data at the hydrogen outlet of fuel cell pile, and adjust the opening angle of the first back pressure regulator according to the air pressure data and/or the opening angle of the second back pressure regulator is adjusted according to the Hydrogen Vapor Pressure data, solve that gas pressure in fuel cell channel in the prior art is too low to influence fuel cell reaction efficiency, gas pressure is too high to cause pile sealing difficult, the problem of both sides gas differential pressure increase easily damages diaphragm.
Description
Technical field
The present invention relates to automobile manufacturing field, and in particular to a kind of gas pressure control system and method.
Background technology
Hydrogen fuel electric automobile is during traveling, and due to road conditions and the difference of speed, the reality of hydrogen fuel cell is defeated
It is also different to go out power.And due to the difference of power output, the yield of fuel cell reaction product --- water is also not
With.The water that hydrogen/sky Proton Exchange Membrane Fuel Cells reaction is produced is in this side of air, it is necessary to as air discharges pile together
Outside.When power output reduces, the water of generation is reduced, it is necessary to is reduced the flow of air, otherwise can be dried up reaction film, shadow
Ring reaction efficiency；When power output increases, the water of generation increases, it is necessary to increase the flow of air, otherwise can pile
Internal ponding, can also influence reaction efficiency.However, due to the difference of air mass flow, cause pressure in runner being also continually changing,
Flow, which is reduced, can reduce runner inner air pressure, and flow increase can then increase air pressure.The too low air/hydrogen in reaction film both sides
Atmospheric pressure can also influence reaction efficiency, and too high air/hydrogen atmospheric pressure can then cause pile sealing difficult, diaphragm both sides air with
The increase of hydrogen pressure difference easily damages diaphragm.
The content of the invention
In view of this, the embodiments of the invention provide a kind of gas pressure control system and method, to solve prior art
Gas pressure is too low in middle fuel cell channel can influence fuel cell reaction efficiency, and gas pressure is too high to cause pile sealing tired
Difficulty, the problem of gas differential pressure increase in both sides easily damages diaphragm.
Therefore, the embodiments of the invention provide following technical scheme：
One side according to embodiments of the present invention there is provided a kind of gas pressure control system, including：First back pressure is adjusted
Save device；Wherein, first back pressure regulator is connected with the FCU, and first back pressure regulator is installed on fuel cell electricity
At the air outlet slit of heap；The FCU is used to obtain the air pressure data at the air outlet slit of the fuel cell pile, and root
The opening angle of first back pressure regulator is adjusted according to the air pressure data；And/or, the second back pressure regulator is described
Second back pressure regulator is connected with the FCU, and the hydrogen that second back pressure regulator is installed on the fuel cell pile goes out
At mouthful；The FCU is used to obtain the Hydrogen Vapor Pressure data at the hydrogen outlet of the fuel cell pile, and according to the hydrogen
Pressure data adjusts the opening angle of second back pressure regulator.
Alternatively, the FCU is additionally operable to when the air pressure data are more than or equal to the first predetermined threshold, increase
The opening angle of first back pressure regulator, when the air pressure data are less than first predetermined threshold, reduces institute
State the opening angle of the first back pressure regulator；And/or, the FCU is additionally operable to be more than or equal in the Hydrogen Vapor Pressure data
During the second predetermined threshold, increase the opening angle of second back pressure regulator, be less than described the in the Hydrogen Vapor Pressure data
During two predetermined thresholds, reduce the opening angle of second back pressure regulator.
Alternatively, the air-pressure controlling system also includes：Air compressor machine, the air compressor machine is installed on the fuel cell
Pile porch, the air mass flow in runner for adjusting the fuel cell；Wherein, the FCU is in fuel electricity
The power output in pond is more than or during equal to three predetermined thresholds, increases the power of the air compressor machine；The FCU is in the fuel
When the power output of battery is less than three predetermined threshold, reduce the power of the air compressor machine.
Alternatively, the air-pressure controlling system also includes：First pressure sensor, the first pressure sensor peace
At air outlet slit loaded on the fuel cell pile, for gathering the air pressure data, and by the air pressure number
According to transmission to the FCU；And/or, second pressure sensor, the second pressure sensor is installed on the fuel cell pile
Hydrogen outlet at, sent for gathering the Hydrogen Vapor Pressure data, and by the Hydrogen Vapor Pressure data to the FCU.
Alternatively, the FCU is additionally operable to the air pressure data and the 4th predetermined threshold being compared, and obtains first
Comparative result；When first comparative result is more than five predetermined thresholds, using Fuzzy Control Model regulation first back of the body
Press the opening angle of adjuster；When first comparative result is less than or equal to five predetermined threshold, controlled using PID
The opening angle of first back pressure regulator described in mode tuning processed；And/or, the FCU is additionally operable to the Hydrogen Vapor Pressure data
It is compared with the 6th predetermined threshold, obtains the second comparative result；When second comparative result is more than seven predetermined thresholds,
The opening angle of second back pressure regulator is adjusted using Fuzzy Control Model；It is less than or waits in second comparative result
When seven predetermined threshold, using the opening angle of the second back pressure regulator described in PID control mode tuning.
Alternatively, after the opening angle for adjusting first back pressure regulator, and/or, adjust second back pressure and adjust
After the opening angle for saving device, the difference of the Hydrogen Vapor Pressure value in hydrogen paths and the air pressure value in air duct belongs to pre-
If scope.
Alternatively, first comparative result is inclined relative to the 4th predetermined threshold including the air pressure data
Difference and/or rate of change；And/or, it is predetermined relative to the described 6th that second comparative result includes the Hydrogen Vapor Pressure data
The deviation and/or rate of change of threshold value.
Alternatively, the gas pressure control system, in addition to：Circulating pump, the circulating pump is installed on the fuel electricity
At the hydrogen outlet of pond pile and between the hydrogen inlet of the fuel cell pile, for will be discharged at the hydrogen outlet
Hydrogen be passed through again at the hydrogen inlet by circulating pump.
Other side according to embodiments of the present invention, additionally provides a kind of gas pressure control method, including：Obtain combustion
Expect the air pressure data at the air outlet slit of battery pile；The first back pressure regulator is adjusted according to the air pressure data
Opening angle；Wherein, first back pressure regulator is installed at the air outlet slit of the fuel cell pile；And/or, obtain
Hydrogen Vapor Pressure data at the hydrogen outlet of the fuel cell pile；The second back pressure is adjusted according to the Hydrogen Vapor Pressure data to adjust
Save the opening angle of device；Wherein, second back pressure regulator is installed at the hydrogen outlet of the fuel cell pile.
Alternatively, the opening angle for adjusting the first back pressure regulator according to the air pressure data includes：In the sky
When air pressure force data is more than or equal to the first predetermined threshold, increase the opening angle of first back pressure regulator, described
When air pressure data are less than first predetermined threshold, reduce the opening angle of first back pressure regulator；And/or, root
The opening angle for adjusting the second back pressure regulator according to the Hydrogen Vapor Pressure data includes：Be more than in the Hydrogen Vapor Pressure data or
During equal to the second predetermined threshold, increase the opening angle of second back pressure regulator, be less than institute in the Hydrogen Vapor Pressure data
When stating the second predetermined threshold, reduce the opening angle of second back pressure regulator.
Alternatively, the opening angle for adjusting first back pressure regulator according to the air pressure data includes：By institute
State air pressure data to be compared with the 3rd predetermined threshold, obtain the first comparative result；It is more than in first comparative result
During four predetermined thresholds, the opening angle of first back pressure regulator is adjusted using Fuzzy Control Model；In the described first ratio
When relatively result is less than or equal to four predetermined threshold, using the first back pressure regulator described in PID control mode tuning
Opening angle；And/or, included according to the opening angle that the Hydrogen Vapor Pressure data adjust second back pressure regulator：By institute
State Hydrogen Vapor Pressure data to be compared with the 5th predetermined threshold, obtain the second comparative result；It is more than in second comparative result
During six predetermined thresholds, the opening angle of second back pressure regulator is adjusted using Fuzzy Control Model；In the described second ratio
When relatively result is less than or equal to six predetermined threshold, using the second back pressure regulator described in PID control mode tuning
Opening angle.
Alternatively, after the opening angle for adjusting first back pressure regulator, and/or, adjust second back pressure and adjust
After the opening angle for saving device, the difference of the Hydrogen Vapor Pressure value in hydrogen paths and the air pressure value in air duct belongs to pre-
If scope.
Alternatively, first comparative result is inclined relative to the 3rd predetermined threshold including the air pressure data
Difference and/or rate of change；And/or, it is predetermined relative to the described 5th that second comparative result includes the Hydrogen Vapor Pressure data
The deviation and/or rate of change of threshold value.
Technical scheme of the embodiment of the present invention, has the following advantages that：
The embodiments of the invention provide a kind of gas pressure control system and method, the gas pressure control system includes combustion
Expect battery controller FCU and, the first back pressure regulator and/or the second back pressure regulator, first back pressure regulator and/or the
Two back pressure regulators are connected with FCU, and the first back pressure regulator is installed at the air outlet slit of fuel cell pile, and the second back pressure is adjusted
Section device is installed at the hydrogen outlet of fuel cell pile, and FCU is used to obtain the air at the air outlet slit of fuel cell pile
Hydrogen Vapor Pressure data at the hydrogen outlet of pressure data and/or fuel cell pile, and adjusted according to the air pressure data
The opening angle of first back pressure regulator and/or the opening angle that the second back pressure regulator is adjusted according to the Hydrogen Vapor Pressure data.
When the pile power output increase of fuel cell, the increase of air input flow rate, outlet air pressure increase, Fuel Cell Control
The opening angle of device FCU control the first back pressure regulators of increase；When the pile power output of fuel cell declines, air input
Flow is reduced, and outlet air pressure reduction, fuel cell controller FCU controls reduce the opening angle of the first back pressure regulator,
Stablizing relatively for humidity in pile runner and proton membrane both sides gas pressure is realized with this.Fired in the prior art so as to solve
Fuel cell reaction efficiency can be influenceed by expecting that the gas pressure in two side runners of battery pile is too low, and gas pressure is too high to be caused
The problem of reaction film both sides gas differential pressure increases easy injury response film.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a structured flowchart of gas pressure control system according to embodiments of the present invention；
Fig. 2 is a flow chart of air-pressure controlling method according to embodiments of the present invention；
Fig. 3 is another structured flowchart of gas pressure control system according to embodiments of the present invention；
Fig. 4 is another flow chart of gas pressure control method according to embodiments of the present invention；
Fig. 5 is Fuzzy-PID logic chart according to embodiments of the present invention；
Fig. 6 is another flow chart of gas pressure control method according to embodiments of the present invention；
Fig. 7 is the specific schematic device of gas pressure control system according to embodiments of the present invention.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify description, rather than indicate or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicating or implying relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, can be with
It is the connection of two element internals, can is wireless connection or wired connection.For one of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
As long as in addition, technical characteristic involved in invention described below different embodiments non-structure each other
It can just be combined with each other into conflict.
Embodiment 1
A kind of gas pressure control system is provided in the present embodiment, Fig. 1 is gas pressure according to embodiments of the present invention
One structured flowchart of control system, as shown in figure 1, including fuel cell controller FCU11 and the first back pressure regulator 12,
Wherein, the first back pressure regulator 12 is connected with FCU11, and the first back pressure regulator 12 is installed on the air outlet slit of fuel cell pile
Place, FCU11 is used to obtain the air pressure data at the air outlet slit of fuel cell pile, and is adjusted according to air pressure data
The opening angle of first back pressure regulator 12.For example in hydrogen fuel cell, first is installed in the air flow channel exit of pile
Back pressure regulator 12, when the power output of fuel cell declines, air input flow rate reduces, and causes fuel cell pile to export
The air pressure data at place reduce, when the air pressure data are less than the first predetermined threshold, fuel cell controller FCU11 controls
System reduces the opening angle of the first back pressure regulator 12, so as to increase the air pressure in air flow channel；It is defeated when fuel cell
When going out power rise, the increase of air input flow rate causes the air pressure data in fuel cell pile exit to increase, when the sky
When air pressure force data is more than or equal to the first predetermined threshold, fuel cell controller FCU11 control increase back pressure regulators
Opening angle, so as to reduce the air pressure in air flow channel, the humidity of fuel cell pile inner air runner is realized with this
With stablizing relatively for pressure.Above-mentioned first predetermined threshold can be flexibly configured as needed.So as to solve prior art
Middle fuel cell channel inner air pressure is too low to influence fuel cell reaction efficiency, and air pressure is too high to cause reaction film two
The problem of side gas differential pressure increases easy injury response film.
In one alternate embodiment, the gas pressure control system also enters including being installed on the air of fuel cell pile
Air compressor machine at mouthful, the air mass flow in runner for adjusting fuel cell, wherein, output works of the FCU11 in fuel cell
When rate is more than or equal to three predetermined thresholds, increase the power of air compressor machine, FCU11 is less than the in the power output of fuel cell
During three predetermined thresholds, reduce the power of air compressor machine.In the power output increase of fuel cell, the water of generation increases, it is necessary to
Increase the air mass flow in pile runner, otherwise meeting ponding inside pile, influences reaction efficiency, in order to solve the technical problem,
Specifically, FCU11 is more than in the power output of the fuel cell or during equal to three predetermined thresholds, increases the work(of air compressor machine
Rate, so as to reduce ponding inside pile；When the power output of fuel cell reduces, the water of generation is reduced, it is necessary to reduce electricity
Air mass flow in heap runner, otherwise can dry up reaction film, influence reaction efficiency, in order to solve the technical problem, specifically,
FCU11 reduces the power of air compressor machine, so as to avoid due to electricity when the power output of the fuel cell is less than three predetermined thresholds
The less drying reaction film of heap internal moisture.Above-mentioned 3rd predetermined threshold can be flexibly configured as needed.
The air pressure data at air outlet slit in order to gather fuel cell pile, in one alternate embodiment, should
Gas pressure control system also includes being installed on the first pressure sensor at the air outlet slit of fuel cell pile, for gathering
Air pressure data, and air pressure data are sent to FCU11.That is, the change of the pile power output of fuel cell
Change can cause the runner internal air pressure of pile to change, and pressure sensor is arranged at pile air outlet slit, in real time collection electricity
The air pressure data in heap exit, and the air pressure data are sent to FCU11.FCU11 is additionally operable to the air pressure
Data are compared with the 4th predetermined threshold, obtain the first comparative result, the 4th predetermined threshold and above-mentioned first predetermined threshold
It can be same value, be the reaction optimum air pressure of default.In another alternative embodiment, the first comparative result can
To be deviation or the air pressure data of the air pressure data relative to the 4th predetermined threshold relative to the 4th
The rate of change of predetermined threshold.Above-mentioned 4th predetermined threshold can be flexibly configured as needed.
When above-mentioned first comparative result is more than five predetermined thresholds, the first backpressure regulation is adjusted using Fuzzy Control Model
The opening angle of device 12, when above-mentioned first comparative result is less than or equal to five predetermined thresholds, is adjusted using PID control pattern
Save the opening angle of the first back pressure regulator 12.Because the motor of hydrogen fuel electric automobile and the working environment of controller are disliked
Bad, live load is big with rotation speed change scope, and fuzzy-PI D Compound Control Strategies are carried out in the control to air pressure, are realized to sky
The accurate control of atmospheric pressure, coordinates the switching between two kinds of control models using FCU11, makes two kinds of control models in different range
Inside make the most of the advantage, in the case where deviation or rate of change are larger, with Fuzzy Control Model, play fuzzy control rapidity and anti-
The strong advantage of jamming performance, in the case of deviation and rate of change are all less, uses PID control pattern, plays the stable state of PID control
Characteristic is good, the high advantage of control accuracy.
In a detailed embodiment, after the opening angle for adjusting above-mentioned first back pressure regulator 12, hydrogen paths
The difference of interior Hydrogen Vapor Pressure value and the air pressure value in air duct belongs to preset range.By adjusting fuel cell pile
Air flow channel exit the first back pressure regulator 12 opening angle, to control the gas pressure in air flow channel, adjust
To consider that the difference of the gas pressure in gas pressure and air flow channel in hydrogen runner is maintained within the scope of one during section, mesh
Be be not in because side gas pressure is excessive and causes damage anti-for the balance of maintenance reaction film both sides gas pressure
The problem of answering film.
A kind of gas pressure control method is additionally provided in embodiments of the present invention, and this method is applied to FCU11, and Fig. 2 is
One flow chart of gas pressure control method according to embodiments of the present invention, as shown in Fig. 2 the flow comprises the following steps：
Step S201：Obtain the air pressure data at the air outlet slit of fuel cell pile；Fuel cell controller
FCU11 obtains the real-time power output of fuel cell.
Step S202：The opening angle of the first back pressure regulator 12 is adjusted according to air pressure data, wherein, the first back pressure
Adjuster 12 is installed at the air outlet slit of fuel cell pile.Specifically, it is more than or equal to the in the air pressure data
During one predetermined threshold, increase the opening angle of the first back pressure regulator 12, be less than the first predetermined threshold in the air pressure data
During value, reduce the opening angle of the first back pressure regulator 12.Wherein, first predetermined threshold can be the reaction of default most
Good air pressure value.
By above-mentioned steps, the air pressure data at the air outlet slit of fuel cell pile are obtained, according to air pressure
Data adjust the opening angle of the first back pressure regulator 12.When the power output of fuel cell declines, air input flow rate subtracts
It is small, cause the air pressure data at the air outlet slit of fuel cell pile to reduce, when the air pressure data are pre- less than first
When determining threshold value, reduce the opening angle of the first back pressure regulator 12, so as to increase the air pressure in runner；When fuel cell
When power output is raised, the increase of air input flow rate causes the air pressure data in fuel cell pile exit to increase, when this
When air pressure data are more than or equal to the first predetermined threshold, increase the opening angle of the first back pressure regulator 12, so as to subtract
Air pressure in small flow channels, the humidity that fuel cell pile inner air runner is realized with this and pressure relatively stablize.From
And solve that fuel cell channel inner air pressure in the prior art is too low to influence fuel cell reaction efficiency, air pressure mistake
Height can cause the problem of reaction film both sides gas differential pressure increases easy injury response film.
Above-mentioned steps S202 is related to the opening angle for adjusting the first back pressure regulator 12 according to air pressure data and included：
Air pressure data are compared with the 3rd predetermined threshold, the first comparative result is obtained, are more than the 4th in the first comparative result
During predetermined threshold, the opening angle of the first back pressure regulator 12 is adjusted using Fuzzy Control Model, is less than in the first comparative result
Or during equal to four predetermined thresholds, using the opening angle of the first back pressure regulator of PID control mode tuning 12.4th is pre-
It can be same value to determine threshold value and above-mentioned first predetermined threshold, be the reaction optimum air pressure of default, can at another
Select in embodiment, the first comparative result can be the air pressure data relative to the deviation of the 4th predetermined threshold, can also
It is rate of change of the air pressure data relative to the 4th predetermined threshold.Motor and control due to hydrogen fuel electric automobile
The working environment of device is severe, and live load is big with rotation speed change scope, and the compound controls of fuzzy-PI D are carried out in the control to air pressure
System strategy, realizes the accurate control to air pressure, and the switching between two kinds of control models is coordinated using FCU11, makes two kinds of controls
Molding formula is made the most of the advantage in different range, in the case where deviation or rate of change are larger, with Fuzzy Control Model, plays mould
The advantage of paste control rapidity and strong anti-interference performance, in the case of deviation and rate of change are all less, uses PID control pattern,
The steady-state characteristic for playing PID control is good, the high advantage of control accuracy.
In a detailed embodiment, after the opening angle for adjusting above-mentioned first back pressure regulator 12, hydrogen paths
The difference of interior Hydrogen Vapor Pressure value and the air pressure value in air duct belongs to preset range.By adjusting fuel cell pile
Air flow channel exit the first back pressure regulator 12 opening angle, to control the gas pressure in air flow channel, adjust
To consider that the difference of the gas pressure in gas pressure and air flow channel in hydrogen runner is maintained within the scope of one during section, mesh
Be be not in because side gas pressure is excessive and causes damage anti-for the balance of maintenance reaction film both sides gas pressure
The problem of answering film.
The embodiment of the present invention additionally provides a kind of gas pressure control system, and Fig. 3 is gas according to embodiments of the present invention
Another structured flowchart of control pressurer system, includes as shown in Figure 3：Fuel cell controller FCU11 and the second back pressure are adjusted
Device 32 is saved, the second back pressure regulator 32 is connected with FCU11, and the hydrogen that the second back pressure regulator 32 is installed on fuel cell pile goes out
At mouthful, FCU11 is used to obtain the Hydrogen Vapor Pressure data at the hydrogen outlet of fuel cell pile, and is adjusted according to Hydrogen Vapor Pressure data
Save the opening angle of the second back pressure regulator 32.Specifically, when the hydrogen flowing quantity that fuel cell pile is inputted increases, hydrogen is caused
Hydrogen Vapor Pressure increase in runner, when the Hydrogen Vapor Pressure data in exit are more than or equal to the second predetermined threshold, increase the
The opening angle of two back pressure regulators 32, so as to reduce the Hydrogen Vapor Pressure in pile internal hydrogen runner, in Hydrogen Vapor Pressure data
During less than the second predetermined threshold, reduce the opening angle of the second back pressure regulator 32, so as to increase the hydrogen pressure in hydrogen runner
Power, the humidity that fuel cell pile internal hydrogen runner is realized with this and pressure relatively stablize.Above-mentioned second predetermined threshold can
To be flexibly configured as needed.So as to solve, Hydrogen Vapor Pressure in fuel cell channel in the prior art is too low to influence combustion
Expect cell reaction efficiency, Hydrogen Vapor Pressure is too high to cause the problem of reaction film both sides gas differential pressure increases easy injury response film.
In one alternate embodiment, the gas pressure control system also goes out including being installed on the hydrogen of fuel cell pile
Second pressure sensor at mouthful, sends to FCU11 for gathering Hydrogen Vapor Pressure data, and by Hydrogen Vapor Pressure data.Second pressure
Force snesor is arranged at pile hydrogen outlet, in real time the Hydrogen Vapor Pressure data in collection pile exit, and by the Hydrogen Vapor Pressure
Data are sent to FCU11, and FCU11 is additionally operable to Hydrogen Vapor Pressure data being compared with the 6th predetermined threshold, obtains second and compare
As a result, the 6th predetermined threshold and above-mentioned second predetermined threshold can be same values, be the optimal hydrogen pressure of reaction of default
Power.In another alternative embodiment, the second comparative result can be that Hydrogen Vapor Pressure data are inclined relative to the 6th predetermined threshold
The rate of change of difference or Hydrogen Vapor Pressure data relative to the 6th predetermined threshold.Above-mentioned 6th predetermined threshold can basis
Need flexibly to be configured.
When above-mentioned second comparative result is more than seven predetermined thresholds, the second backpressure regulation is adjusted using Fuzzy Control Model
The opening angle of device 32, when the second comparative result is less than or equal to seven predetermined thresholds, using PID control mode tuning the
The opening angle of two back pressure regulators 32.Because the motor of hydrogen fuel electric automobile and the working environment of controller are severe,
Live load is big with rotation speed change scope, and fuzzy-PI D Compound Control Strategies are carried out in the control to Hydrogen Vapor Pressure, are realized to hydrogen
The accurate control of pressure, coordinates the switching between two kinds of control models using FCU11, makes two kinds of control models in different range
Make the most of the advantage, in the case where deviation or rate of change are larger, with Fuzzy Control Model, play fuzzy control rapidity and anti-dry
Immunity can strong advantage, in the case of deviation and rate of change are all less, use PID control pattern, the stable state for playing PID control is special
Good, the high advantage of control accuracy of property.
In a detailed embodiment, after the opening angle for adjusting above-mentioned second back pressure regulator 32, hydrogen paths
The difference of interior Hydrogen Vapor Pressure value and the air pressure value in air duct belongs to preset range.By adjusting fuel cell pile
Hydrogen runner exit at the second back pressure regulator 32 opening angle, to control the gas pressure in hydrogen runner, adjust
To consider that the difference of the gas pressure in gas pressure and air flow channel in hydrogen runner is maintained within the scope of one during section, mesh
Be be not in because side gas pressure is excessive and causes damage anti-for the balance of maintenance reaction film both sides gas pressure
The problem of answering film.
In order to better profit from the energy, in one alternate embodiment, the gas pressure control system also includes circulating pump,
The circulating pump is installed at the hydrogen outlet of fuel cell pile and between the hydrogen inlet of fuel cell pile, for by hydrogen
The hydrogen of gas outlet discharge is passed through at hydrogen inlet again by circulating pump.If the hydrogen discharged at hydrogen outlet is discharged directly into
In air, the waste of resource can be caused, therefore a circulating pump is set at hydrogen outlet and between hydrogen inlet, makes discharge
Hydrogen enter back into hydrogen runner, it is to avoid the wasting of resources.
A kind of gas pressure control method is additionally provided in embodiments of the present invention, and this method is applied to FCU11, and Fig. 4 is
Another flow chart of gas pressure control method according to embodiments of the present invention, as shown in figure 4, the flow includes following step
Suddenly：
Step S401：Obtain the Hydrogen Vapor Pressure data at the hydrogen outlet of fuel cell pile；FCU11 obtains hydrogen in real time
The Hydrogen Vapor Pressure data in exit.
Step S402：The opening angle of the second back pressure regulator 32 is adjusted according to Hydrogen Vapor Pressure data, wherein, the second back pressure
Adjuster 32 is installed at the hydrogen outlet of fuel cell pile.Specifically, it is more than or equal to second in Hydrogen Vapor Pressure data
During predetermined threshold, increase the opening angle of the second back pressure regulator 32, be less than second predetermined threshold in the Hydrogen Vapor Pressure data
When, reduce the opening angle of the second back pressure regulator 32.Wherein, second predetermined threshold can be default reaction it is optimal
Hydrogen Vapor Pressure value.
By above-mentioned steps, the Hydrogen Vapor Pressure data at the hydrogen outlet of fuel cell pile are obtained, according to Hydrogen Vapor Pressure
Data adjust the opening angle of the second back pressure regulator 32.When hydrogen input flow rate reduces, cause the hydrogen of fuel cell pile
The Hydrogen Vapor Pressure data of gas outlet reduce, and when the Hydrogen Vapor Pressure data are less than the second predetermined threshold, reduce the second back pressure and adjust
The opening angle of device 32 is saved, so as to increase the Hydrogen Vapor Pressure in runner；When hydrogen input flow rate increase, cause fuel cell electricity
The Hydrogen Vapor Pressure data increase in heap exit, when the Hydrogen Vapor Pressure data are more than or equal to the second predetermined threshold, increase the
The opening angle of two back pressure regulators 32, so as to reduce the Hydrogen Vapor Pressure in runner, fuel cell pile internal hydrogen is realized with this
The humidity of flow channel and stablizing relatively for pressure.So as to solve the too low meeting of Hydrogen Vapor Pressure in fuel cell channel in the prior art
Fuel cell reaction efficiency is influenceed, Hydrogen Vapor Pressure is too high to cause reaction film both sides gas differential pressure to increase easy injury response film
Problem.
Above-mentioned steps S402 is related to the opening angle for adjusting the second back pressure regulator 32 according to Hydrogen Vapor Pressure data and included：
Hydrogen Vapor Pressure data are compared with the 5th predetermined threshold, the second comparative result is obtained, are more than the 6th in the second comparative result
During predetermined threshold, the opening angle of the second back pressure regulator 32 is adjusted using Fuzzy Control Model, is less than in the second comparative result
Or during equal to six predetermined thresholds, using the opening angle of the second back pressure regulator of PID control mode tuning 32.6th is pre-
It can be same value to determine threshold value and above-mentioned second predetermined threshold, be the optimal Hydrogen Vapor Pressure of reaction of default, can at another
Select in embodiment, the second comparative result can be the Hydrogen Vapor Pressure data relative to the deviation of the 6th predetermined threshold, can also
It is rate of change of the Hydrogen Vapor Pressure data relative to the 6th predetermined threshold.Motor and control due to hydrogen fuel electric automobile
The working environment of device is severe, and live load is big with rotation speed change scope, and the compound controls of fuzzy-PI D are carried out in the control to Hydrogen Vapor Pressure
System strategy, realizes the accurate control to Hydrogen Vapor Pressure, and the switching between two kinds of control models is coordinated using FCU11, makes two kinds of controls
Molding formula is made the most of the advantage in different range, in the case where deviation or rate of change are larger, with Fuzzy Control Model, plays mould
The advantage of paste control rapidity and strong anti-interference performance, in the case of deviation and rate of change are all less, uses PID control pattern,
The steady-state characteristic for playing PID control is good, the high advantage of control accuracy.
In a detailed embodiment, after the opening angle for adjusting above-mentioned second back pressure regulator 32, hydrogen paths
The difference of interior Hydrogen Vapor Pressure value and the air pressure value in air duct belongs to preset range.By adjusting fuel cell pile
Hydrogen runner exit at the second back pressure regulator 32 opening angle, to control the gas pressure in hydrogen runner, adjust
To consider that the difference of the gas pressure in gas pressure and air flow channel in hydrogen runner is maintained within the scope of one during section, mesh
Be be not in because side gas pressure is excessive and causes damage anti-for the balance of maintenance reaction film both sides gas pressure
The problem of answering film.
Fig. 5 is Fuzzy-PID logic chart according to embodiments of the present invention, as shown in figure 5, will get
Real-time air pressure value and the reaction optimum air pressure value (equivalent to above-mentioned 3rd predetermined threshold) of default divided
Analysis, calculates departure and rate of change, in the case where deviation or rate of change are larger, with Fuzzy Control Model, plays fuzzy
The advantage of rapidity and strong anti-interference performance is controlled, in the case of deviation and rate of change are all less, PID control pattern are used, sends out
The steady-state characteristic for waving PID control is good, the high advantage of control accuracy.
Fig. 6 is another flow chart of gas pressure control method according to embodiments of the present invention, as shown in fig. 6, one
In individual alternative embodiment, fuel cell controller FCU11 receives the power output signal of the pile of fuel cell, judges output work
The change of rate；If power output reduces, fuel cell controller FCU11 controls reduce pneumatics acc power, are reduced with this defeated
Enter the air mass flow inside the air flow channel of pile, if power output increases, fuel cell controller FCU11 control increases
Pneumatics acc power, increases the air mass flow inside the air flow channel of input pile with this；In the pile exit of fuel cell
Real-time air pressure data inside pressure sensor collection runner, and pressure data is sent to fuel cell controller
FCU11；FCU11 controls the opening angle of back pressure regulator using Fuzzy-PID, and the sky of pile is realized with this
Humidity and pressure inside flow channel are relatively stablized.
Fig. 7 is the specific schematic device of gas pressure control system according to embodiments of the present invention.As shown in fig. 7,
In one alternative embodiment, the air flow channel exit of fuel cell pile is provided with first pressure sensor 702, hydrogen runner
Exit is provided with second pressure sensor 701, and second throttle is provided with the hydrogen inlet of fuel cell pile
703, first throttle valve 704 is installed at air intake, the first back pressure regulator 705 is installed at air outlet slit, in hydrogen
Gas outlet is provided with the second back pressure regulator 706, and circulating pump 711 is provided with hydrogen outlet and between hydrogen inlet.
With the change of fuel cell output power, fuel cell controller FCU11 controls first throttle valve 703 and second to throttle respectively
Valve 704, so that air mass flow and hydrogen flowing quantity are controlled, when the gas pressure change in runner, the He of first pressure sensor 702
The gas pressure data in exit is sent to FCU11 by second pressure sensor 701, air pressure data be more than or equal to be
During the optimum response air pressure set of uniting, FCU11 controls the first back pressure regulator 705 increase opening angle, in air pressure
When data are less than the optimum response air pressure of default, FCU11 controls the first back pressure regulator 705 to reduce opening angle,
Departure and rate of change of the air pressure data relative to the optimum response air pressure of default are calculated simultaneously, in deviation
Or in the case that rate of change is larger, with Fuzzy Control Model, fuzzy control rapidity and the advantage of strong anti-interference performance are played,
In the case of deviation and rate of change are all less, PID control pattern is used, the steady-state characteristic for playing PID control is good, control accuracy is high
Advantage.Regulations of the FCU11 to the second back pressure regulator 706, same first back pressure regulator 705 of principle, meanwhile, it should ensure that right
After first back pressure regulator 705 and the second back pressure regulator 706 adjustment opening angle, air pressure data and Hydrogen Vapor Pressure number
According to difference maintain within the scope of one, in order to the balance of maintenance reaction film both sides gas pressure, be not in because
Side gas pressure is excessive and the problem of causing injury response film.Meanwhile, circulating pump 711 can make the hydrogen discharged at hydrogen outlet
Gas is entered back at hydrogen inlet by circulating pump 711, saves the energy, improves hydrogen utilization ratio.
Obviously, above-described embodiment is only intended to clearly illustrate example, and the not restriction to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among changing still in the protection domain of the invention.
Claims (13)
1. a kind of gas pressure control system, it is characterised in that including：Fuel cell controller FCU and：
First back pressure regulator；Wherein, first back pressure regulator is connected with the FCU, the first back pressure regulator peace
At air outlet slit loaded on fuel cell pile；The FCU is used to obtain the sky at the air outlet slit of the fuel cell pile
Air pressure force data, and according to the opening angle of air pressure data regulation first back pressure regulator；And/or,
Second back pressure regulator, second back pressure regulator is connected with the FCU, and second back pressure regulator is installed on institute
State at the hydrogen outlet of fuel cell pile；The FCU is used to obtain the hydrogen at the hydrogen outlet of the fuel cell pile
Pressure data, and according to the opening angle of Hydrogen Vapor Pressure data regulation second back pressure regulator.
2. gas pressure control system according to claim 1, it is characterised in that
The FCU is additionally operable to, when the air pressure data are more than or equal to the first predetermined threshold, increase first back of the body
The opening angle of adjuster is pressed, when the air pressure data are less than first predetermined threshold, reduces first back pressure
The opening angle of adjuster；And/or,
The FCU is additionally operable to, when the Hydrogen Vapor Pressure data are more than or equal to the second predetermined threshold, increase second back of the body
The opening angle of adjuster is pressed, when the Hydrogen Vapor Pressure data are less than second predetermined threshold, reduces second back pressure
The opening angle of adjuster.
3. gas pressure control system according to claim 1, it is characterised in that also include：
Air compressor machine, the air compressor machine is installed on the pile porch of the fuel cell, the stream for adjusting the fuel cell
Air mass flow in road；
Wherein, the FCU is more than in the power output of the fuel cell or during equal to three predetermined thresholds, increases the sky
The power of press；The FCU reduces the pneumatics when the power output of the fuel cell is less than three predetermined threshold
The power of machine.
4. gas pressure control system according to claim 1, it is characterised in that also include：
First pressure sensor, the first pressure sensor is installed at the air outlet slit of the fuel cell pile, is used for
The air pressure data are gathered, and the air pressure data are sent to the FCU；And/or,
Second pressure sensor, the second pressure sensor is installed at the hydrogen outlet of the fuel cell pile, is used for
The Hydrogen Vapor Pressure data are gathered, and the Hydrogen Vapor Pressure data are sent to the FCU.
5. gas pressure control system according to claim 1, it is characterised in that
The FCU is additionally operable to the air pressure data and the 4th predetermined threshold being compared, and obtains the first comparative result；
When first comparative result is more than five predetermined thresholds, opening for first back pressure regulator is adjusted using Fuzzy Control Model
Open angle；When first comparative result is less than or equal to five predetermined threshold, using PID control mode tuning institute
State the opening angle of the first back pressure regulator；And/or,
The FCU is additionally operable to the Hydrogen Vapor Pressure data and the 6th predetermined threshold being compared, and obtains the second comparative result；
When second comparative result is more than seven predetermined thresholds, opening for second back pressure regulator is adjusted using Fuzzy Control Model
Open angle；When second comparative result is less than or equal to seven predetermined threshold, using PID control mode tuning institute
State the opening angle of the second back pressure regulator.
6. gas pressure control system according to claim 5, it is characterised in that regulation first back pressure regulator
After opening angle, and/or, after the opening angle for adjusting second back pressure regulator, the Hydrogen Vapor Pressure in hydrogen paths
The difference of value and the air pressure value in air duct belongs to preset range.
7. gas pressure control system according to claim 5, it is characterised in that first comparative result includes described
Deviation and/or rate of change of the air pressure data relative to the 4th predetermined threshold；And/or,
Second comparative result includes deviation of the Hydrogen Vapor Pressure data relative to the 6th predetermined threshold and/or change
Rate.
8. gas pressure control system according to claim 1, it is characterised in that also include：Circulating pump, the circulating pump
It is installed at the hydrogen outlet of the fuel cell pile and between the hydrogen inlet of the fuel cell pile, for by institute
The hydrogen discharged at hydrogen outlet is stated to be passed through again at the hydrogen inlet by circulating pump.
9. a kind of gas pressure control method, it is characterised in that including：
Obtain the air pressure data at the air outlet slit of fuel cell pile；
The opening angle of the first back pressure regulator is adjusted according to the air pressure data；Wherein, first back pressure regulator
At the air outlet slit for being installed on the fuel cell pile；And/or,
Obtain the Hydrogen Vapor Pressure data at the hydrogen outlet of the fuel cell pile；
The opening angle of the second back pressure regulator is adjusted according to the Hydrogen Vapor Pressure data；Wherein, second back pressure regulator
At the hydrogen outlet for being installed on the fuel cell pile.
10. gas pressure control method according to claim 9, it is characterised in that
Included according to the opening angle that the air pressure data adjust the first back pressure regulator：It is big in the air pressure data
When the first predetermined threshold, increase the opening angle of first back pressure regulator, in the air pressure data
During less than first predetermined threshold, reduce the opening angle of first back pressure regulator；And/or,
Included according to the opening angle that the Hydrogen Vapor Pressure data adjust the second back pressure regulator：It is big in the Hydrogen Vapor Pressure data
When the second predetermined threshold, increase the opening angle of second back pressure regulator, in the Hydrogen Vapor Pressure data
During less than second predetermined threshold, reduce the opening angle of second back pressure regulator.
11. gas pressure control method according to claim 9, it is characterised in that
Included according to the opening angle that the air pressure data adjust first back pressure regulator：By the air pressure number
It is compared according to the 3rd predetermined threshold, obtains the first comparative result；It is more than the 4th predetermined threshold in first comparative result
When, the opening angle of first back pressure regulator is adjusted using Fuzzy Control Model；Be less than in first comparative result or
When person is equal to four predetermined threshold, using the opening angle of the first back pressure regulator described in PID control mode tuning；With/
Or,
Included according to the opening angle that the Hydrogen Vapor Pressure data adjust second back pressure regulator：By the Hydrogen Vapor Pressure number
It is compared according to the 5th predetermined threshold, obtains the second comparative result；It is more than the 6th predetermined threshold in second comparative result
When, the opening angle of second back pressure regulator is adjusted using Fuzzy Control Model；Be less than in second comparative result or
When person is equal to six predetermined threshold, using the opening angle of the second back pressure regulator described in PID control mode tuning.
12. gas pressure control method according to claim 11, it is characterised in that regulation first back pressure regulator
Opening angle after, and/or, after the opening angle for adjusting second back pressure regulator, the hydrogen pressure in hydrogen paths
The difference of force value and the air pressure value in air duct belongs to preset range.
13. gas pressure control method according to claim 11, it is characterised in that first comparative result includes institute
State deviation and/or rate of change of the air pressure data relative to the 3rd predetermined threshold；And/or,
Second comparative result includes deviation of the Hydrogen Vapor Pressure data relative to the 5th predetermined threshold and/or change
Rate.
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| CN110364751A (en) * | 2018-03-26 | 2019-10-22 | 郑州宇通客车股份有限公司 | Fuel cell system and its control method |
| CN110597052A (en) * | 2019-09-24 | 2019-12-20 | 武汉理工大学 | Fuel cell air supply controller and control method for quick dynamic response |
| CN110654250A (en) * | 2019-09-30 | 2020-01-07 | 潍柴动力股份有限公司 | Blower system for fuel cell electric vehicle, control method and device |
| CN110854412A (en) * | 2019-11-01 | 2020-02-28 | 深圳国氢新能源科技有限公司 | Control method, device and system for hydrogen fuel cell air compressor |
| CN112397749A (en) * | 2020-11-16 | 2021-02-23 | 合肥工业大学 | Method and device for controlling cathode and anode pressure balance of proton exchange membrane fuel cell |
| CN112467176A (en) * | 2020-12-04 | 2021-03-09 | 上海燃锐新能源汽车技术有限公司 | Hydrogen pressure control method and device for fuel cell engine system |
| CN114824377A (en) * | 2022-06-01 | 2022-07-29 | 潍柴动力股份有限公司 | Fuel cell control method, engine, and nonvolatile storage medium |
| CN114914482A (en) * | 2022-06-28 | 2022-08-16 | 大洋电机燃料电池科技(中山)有限公司 | Self-adjusting electronic back pressure valve, fuel cell system and control method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110364751A (en) * | 2018-03-26 | 2019-10-22 | 郑州宇通客车股份有限公司 | Fuel cell system and its control method |
| CN110364751B (en) * | 2018-03-26 | 2020-10-30 | 郑州宇通客车股份有限公司 | Fuel cell system and control method thereof |
| CN110597052A (en) * | 2019-09-24 | 2019-12-20 | 武汉理工大学 | Fuel cell air supply controller and control method for quick dynamic response |
| CN110654250A (en) * | 2019-09-30 | 2020-01-07 | 潍柴动力股份有限公司 | Blower system for fuel cell electric vehicle, control method and device |
| CN110854412A (en) * | 2019-11-01 | 2020-02-28 | 深圳国氢新能源科技有限公司 | Control method, device and system for hydrogen fuel cell air compressor |
| CN112397749A (en) * | 2020-11-16 | 2021-02-23 | 合肥工业大学 | Method and device for controlling cathode and anode pressure balance of proton exchange membrane fuel cell |
| CN112397749B (en) * | 2020-11-16 | 2021-09-14 | 合肥工业大学 | Method and device for controlling cathode and anode pressure balance of proton exchange membrane fuel cell |
| CN112467176A (en) * | 2020-12-04 | 2021-03-09 | 上海燃锐新能源汽车技术有限公司 | Hydrogen pressure control method and device for fuel cell engine system |
| CN114824377A (en) * | 2022-06-01 | 2022-07-29 | 潍柴动力股份有限公司 | Fuel cell control method, engine, and nonvolatile storage medium |
| CN114914482A (en) * | 2022-06-28 | 2022-08-16 | 大洋电机燃料电池科技(中山)有限公司 | Self-adjusting electronic back pressure valve, fuel cell system and control method |
| CN114914482B (en) * | 2022-06-28 | 2024-04-26 | 大洋电机燃料电池科技(中山)有限公司 | Self-regulating electronic back pressure valve, fuel cell system and control method |
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Effective date of registration: 20211130 Address after: No.500, Xincheng Road, Jiading District, Shanghai Patentee after: Shanghai houling Energy Technology Co.,Ltd. Address before: Room 132, building 5, 1197 Bin'an Road, Binjiang District, Hangzhou City, Zhejiang Province 310000 Patentee before: ZHEJIANG HANGUANG NEW ENERGY TECHNOLOGY CO.,LTD. |