CN208939083U - A kind of air flow adjusting apparatus for proton exchange membrane h2 fuel cell stack - Google Patents
A kind of air flow adjusting apparatus for proton exchange membrane h2 fuel cell stack Download PDFInfo
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- CN208939083U CN208939083U CN201821723142.0U CN201821723142U CN208939083U CN 208939083 U CN208939083 U CN 208939083U CN 201821723142 U CN201821723142 U CN 201821723142U CN 208939083 U CN208939083 U CN 208939083U
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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
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- 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
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Abstract
The utility model discloses a kind of air flow adjusting apparatus for proton exchange membrane h2 fuel cell stack, including membrane electrode monomer voltage detection unit, hydrogen fuel cell main control unit, air pump, temperature and pressure transmitter and current sensor, the output cathode of proton exchange membrane h2 fuel cell stack is connected by current sensor with the positive terminal of load；Temperature and pressure transmitter is mounted on the inside of proton exchange membrane h2 fuel cell stack；Membrane electrode monomer voltage detection unit is connected with the both ends of each membrane electrode monomer；Hydrogen fuel cell main control unit is connected with current sensor, temperature and pressure transmitter, membrane electrode monomer voltage detection unit and air pump respectively, for controlling rule, the revolving speed of corresponding adjustment air pump according to preset operation.The utility model can be effectively relieved in proton exchange membrane h2 fuel cell stack membrane electrode high potential and current potential circulatory problems in the deterioration mode of membrane electrode, promote the battery pile overall work service life under automobile-used working condition.
Description
Technical field
The utility model relates to electronic information technical fields, are used for proton exchange membrane hydrogen fuel cell more particularly to one kind
The air flow adjusting apparatus of heap.
Background technique
Currently, proton exchange film hydrogen fuel battery engines are high with its distinctive fuel efficiency, environment is applicable in, reliability
High, the advantages that noise is low, zero-emission, and be concerned.Compared with existing internal-combustion engines vehicle, proton exchange membrane hydrogen fuel is used
Electric car (i.e. proton exchange film hydrogen fuel cell electric vehicle) of the battery as power source, the row for the pernicious gas having
99% is high-volume reduced, the production quantity of carbon dioxide reduces 75%, and cell power conversion efficiency is about 2.5 times of the efficiency of internal combustion engine.
Proton exchange membrane h2 fuel cell stack is the power source of proton exchange film hydrogen fuel battery engines, by multiple
The monomer series-connected composition of membrane electrode, wherein the desired output voltage Uo calculation formula of each membrane electrode monomer are as follows:
In above-mentioned formula (1),The respectively pressure of hydrogen, oxygen and vapor, EoFor hydrogen fuel electricity
The ideal standard electromotive force of pond heap membrane electrode monomer, R are universal gas constant, and T is h2 fuel cell stack operating temperature, and F is method
Draw constant.
By formula (1) it can be seen that the output voltage U of h2 fuel cell stack membrane electrode monomeroIt is made of two parts, first
Part is the ideal standard electromotive force E of membrane electrode monomero, EoNumerical value mainly determined by the material property of membrane electrode monomer；Second
Part is the environmental variance factor of membrane electrode monomer, mainly by work temperature, Hydrogen Vapor PressureOxygen pressureEqual environment become
The numerical value of amount determines.
Currently, passing through the demonstrating running of proton exchange film hydrogen fuel cell electric vehicle, discovery is used as automobile-used proton exchange
The membrane electrode of film h2 fuel cell stack critical component, deterioration mode includes following two:
1, the high potential problem of proton exchange membrane electrode caused by frequent starting stops, causing the corruption of catalyst carbon support
Erosion；
2, current potential circulatory problems of proton exchange membrane electrode caused by acceleration and deceleration repeatedly, cause catalyst platinum particle coarse
Change.
Therefore, at present there is an urgent need to develop a kind of technology, proton can be effectively relieved under automobile-used working condition
Membrane electrode high potential and current potential circulatory problems in exchange membrane h2 fuel cell stack in the deterioration mode of membrane electrode alleviate hydrogen fuel
The performance degradation of membrane electrode in battery pile promotes the overall work service life of h2 fuel cell stack.
Utility model content
In view of this, the purpose of the utility model is to provide a kind of air streams for proton exchange membrane h2 fuel cell stack
Membrane electrode in proton exchange membrane h2 fuel cell stack can be effectively relieved under automobile-used working condition in quantity regulating device
Membrane electrode high potential and current potential circulatory problems in deterioration mode are alleviated the performance degradation of membrane electrode in h2 fuel cell stack, are mentioned
In the overall work service life for rising h2 fuel cell stack, be conducive to promote and apply, there is great practice significance.
For this purpose, the utility model provides a kind of both air flow modulation dress for proton exchange membrane h2 fuel cell stack
It sets, including membrane electrode monomer voltage detection unit, hydrogen fuel cell main control unit, air pump, temperature and pressure transmitter and electric current
Sensor, in which:
Proton exchange membrane h2 fuel cell stack is constituted by multiple membrane electrodes are monomer series-connected；
The output cathode of proton exchange membrane h2 fuel cell stack is connected by current sensor with the positive terminal of load, matter
The output negative pole of proton exchange h2 fuel cell stack is connected with the negative pole end of load；
Current sensor is then sent to for acquiring the output current value of the proton exchange membrane h2 fuel cell stack
Hydrogen fuel cell main control unit；
Multiple temperature and pressure transmitters are separately mounted to the inside of proton exchange membrane h2 fuel cell stack, for adopting in real time
Collect the temperature value of the proton exchange membrane h2 fuel cell stack and the pressure value of hydrogen, oxygen, is then sent to hydrogen fuel cell master
Control unit；
Membrane electrode monomer voltage detection unit is connected with the both ends of each membrane electrode monomer respectively, each for acquiring
The real-time working voltage value of membrane electrode monomer, is then sent to hydrogen fuel cell main control unit；
Air pump, for external oxygen to be input in the proton exchange membrane h2 fuel cell stack, to provide hydrogen combustion
Expect oxygen required for battery pile work；
Hydrogen fuel cell main control unit is examined with current sensor, temperature and pressure transmitter and membrane electrode monomer voltage respectively
It surveys unit to be connected, for receiving the output electric current for the proton exchange membrane h2 fuel cell stack that the current sensor is sent
Value receives the temperature value and hydrogen, oxygen of the proton exchange membrane h2 fuel cell stack that the temperature and pressure transmitter is sent
Pressure value, and receive the real-time working voltage for each membrane electrode monomer that the membrane electrode monomer voltage detection unit is sent
Value；
The hydrogen fuel cell main control unit, is also connected with air pump, right for controlling rule according to preset operation
The revolving speed of air pump should be adjusted, to adjust the air mass flow supply of proton exchange membrane h2 fuel cell stack.
Wherein, the preset operation control rule, specific as follows:
The hydrogen fuel cell main control unit, according to the output current value of the proton exchange membrane h2 fuel cell stack, with
And according to the temperature value of the proton exchange membrane h2 fuel cell stack and the pressure value of hydrogen, oxygen, calculates and obtain the proton friendship
Change the upper voltage limit threshold value U for the whole membrane electrode monomers having in film h2 fuel cell stackmax_limitWith lower voltage limit threshold value
Umin_limit；
Meanwhile the hydrogen fuel cell main control unit, it is sent also according to the membrane electrode monomer voltage detection unit every
The real-time working voltage value of a membrane electrode monomer directly obtains the highest for the real-time working voltage value that whole membrane electrode monomers have
Value UmaxWith minimum Umin, and by operation of averaging, calculate the real-time working average voltage for obtaining whole membrane electrode monomers
Value Uav；
If the peak U for the real-time working voltage value that whole membrane electrode monomers havemaxGreater than whole membrane electrode monomers
Upper voltage limit threshold value Umax_limit, and the minimum U for the real-time working voltage value that all membrane electrode monomer hasminLess than whole
The lower voltage limit threshold value U of membrane electrode monomermin_limit, judge the membrane electrode in the proton exchange membrane h2 fuel cell stack at this time
There are abnormal conditions in monomer, and hydrogen fuel cell main control unit enters stopping alarm state, and in real time otherwise alarm outward continues
Execute preset air pump rotational speed regulation operation.
Wherein, the preset air pump rotational speed regulation operation are as follows: if whole membrane electrode monomer real-time working voltages are flat
Mean value UavGreater than the upper voltage limit threshold value U of whole membrane electrode monomersmax_limit, illustrate the proton exchange membrane hydrogen fuel electricity at this time
Air mass flow supply in the heap of pond is excessively high, then sends control signal to air pump, lower the revolving speed of air pump；
If whole membrane electrode monomer real-time working average voltage UavLess than the lower voltage limit threshold of whole membrane electrode monomers
Value Umin_limit, illustrate that the air mass flow supply in the proton exchange membrane h2 fuel cell stack at this time is too low, then send control letter
Number give air pump, raise the revolving speed of air pump.
Wherein, the membrane electrode monomer voltage detection unit passes through CAN communication bus and the hydrogen fuel cell master control list
Member is connected.
Wherein, the hydrogen fuel cell main control unit is embedded control unit, programmable controller PLC, central processing
Device CPU, digital signal processor DSP or single-chip microprocessor MCU.
By the above technical solution provided by the utility model as it can be seen that compared with prior art, the utility model provides
A kind of air flow adjusting apparatus for proton exchange membrane h2 fuel cell stack can have under automobile-used working condition
Effect alleviates the membrane electrode high potential and current potential circulatory problems in proton exchange membrane h2 fuel cell stack in the deterioration mode of membrane electrode,
The performance degradation for alleviating membrane electrode in h2 fuel cell stack, promotes the overall work service life of h2 fuel cell stack, is conducive to promote
Using with great practice significance.
Detailed description of the invention
Fig. 1 is a kind of air flow adjusting apparatus for proton exchange membrane h2 fuel cell stack provided by the utility model
Structural block diagram；
Fig. 2 is the stream of the both air flow modulation method provided by the utility model for proton exchange membrane h2 fuel cell stack
Cheng Tu；
Fig. 3 is a kind of air flow adjusting apparatus for proton exchange membrane h2 fuel cell stack provided by the utility model
The circuit diagram for the main control MCU that middle membrane electrode monomer voltage detection unit has；
Fig. 4 is a kind of air flow adjusting apparatus for proton exchange membrane h2 fuel cell stack provided by the utility model
The circuit diagram for the analog-digital converter that middle membrane electrode monomer voltage detection unit has；
Fig. 5 is a kind of air flow adjusting apparatus for proton exchange membrane h2 fuel cell stack provided by the utility model
The circuit diagram for the CAN communication bus transceiver that middle membrane electrode monomer voltage detection unit has；
Fig. 6 is a kind of air flow adjusting apparatus for proton exchange membrane h2 fuel cell stack provided by the utility model
The circuit diagram for multiple isolation optocouplers that middle membrane electrode monomer voltage detection unit has；
Fig. 7 is a kind of air flow adjusting apparatus for proton exchange membrane h2 fuel cell stack provided by the utility model
The circuit diagram for the difference amplifier that middle membrane electrode monomer voltage detection unit has；
Fig. 8 is a kind of air flow adjusting apparatus for proton exchange membrane h2 fuel cell stack provided by the utility model
The circuit diagram for the CAN communication bus filter device that middle membrane electrode monomer voltage detection unit has；
Fig. 9 is a kind of air flow adjusting apparatus for proton exchange membrane h2 fuel cell stack provided by the utility model
The circuit diagram for the CAN communication bus TVS protection diode that middle membrane electrode monomer voltage detection unit has.
Specific embodiment
In order to make those skilled in the art better understand the scheme of the utility model, with reference to the accompanying drawing and embodiment
The utility model is described in further detail.
Referring to Fig. 1, the utility model provides a kind of both air flow modulation for proton exchange membrane h2 fuel cell stack
Device, including membrane electrode monomer voltage detection unit, hydrogen fuel cell main control unit, air pump, temperature and pressure transmitter and electricity
Flow sensor, in which:
Proton exchange membrane h2 fuel cell stack is constituted by multiple membrane electrodes are monomer series-connected；For example, n film as shown in Figure 1
Electrode monomer E1~En is in series, and (n is the sum of membrane electrode monomer in proton exchange membrane h2 fuel cell stack, for greater than zero
Natural number)；
The output cathode of proton exchange membrane h2 fuel cell stack by current sensor with load that (such as electric car is led
Draw motor driver) positive terminal be connected, the output negative pole and the negative pole end phase of load of proton exchange membrane h2 fuel cell stack
Connection；
Current sensor is then sent to for acquiring the output current value of the proton exchange membrane h2 fuel cell stack
Hydrogen fuel cell main control unit；
Multiple temperature and pressure transmitters are separately mounted to the inside of proton exchange membrane h2 fuel cell stack, for adopting in real time
Collect the temperature value of the proton exchange membrane h2 fuel cell stack and the pressure value of hydrogen, oxygen, is then sent to hydrogen fuel cell master
Control unit；
Membrane electrode monomer voltage detection unit, respectively with both ends (the i.e. positive electricity end and negative electrode of each membrane electrode monomer
End) it is connected, for acquiring the real-time working voltage value of each membrane electrode monomer, it is then sent to hydrogen fuel cell master control list
Member；
For example, with reference to shown in Fig. 1, the positive electricity end and negative electricity of n membrane electrode monomer (E1~En) are extreme (C0~Cn), according to
Secondary access membrane electrode monomer voltage detection unit, the membrane electrode monomer voltage detection unit are responsible for acquiring institute in h2 fuel cell stack
The real-time working voltage value of some membrane electrode monomer E1~En, and it is reported to hydrogen fuel cell main control unit；
Air pump is fired for external oxygen (such as oxygen in outside air) to be input to the proton exchange film hydrogen
Expect in battery pile, to provide oxygen required for h2 fuel cell stack works；
Hydrogen fuel cell main control unit is examined with current sensor, temperature and pressure transmitter and membrane electrode monomer voltage respectively
It surveys unit to be connected, for receiving the output electric current for the proton exchange membrane h2 fuel cell stack that the current sensor is sent
Value receives the temperature value and hydrogen, oxygen of the proton exchange membrane h2 fuel cell stack that the temperature and pressure transmitter is sent
Pressure value, and receive the real-time working voltage for each membrane electrode monomer that the membrane electrode monomer voltage detection unit is sent
Value；
The hydrogen fuel cell main control unit, is also connected with air pump, right for controlling rule according to preset operation
The revolving speed of air pump should be adjusted, to adjust the air mass flow supply of proton exchange membrane h2 fuel cell stack.
For the utility model, the preset operation control rule is specific as follows:
The hydrogen fuel cell main control unit, according to the output current value of the proton exchange membrane h2 fuel cell stack, with
And according to the temperature value of the proton exchange membrane h2 fuel cell stack and the pressure value of hydrogen, oxygen, calculates and obtain the proton friendship
Change the upper voltage limit threshold value U for the whole membrane electrode monomers having in film h2 fuel cell stackmax_limitWith lower voltage limit threshold value
Umin_limit；
Meanwhile the hydrogen fuel cell main control unit, it is sent also according to the membrane electrode monomer voltage detection unit every
The real-time working voltage value of a membrane electrode monomer directly obtains the highest for the real-time working voltage value that whole membrane electrode monomers have
Value UmaxWith minimum Umin, and by operation of averaging, calculate the real-time working average voltage for obtaining whole membrane electrode monomers
Value Uav；
If the peak U for the real-time working voltage value that whole membrane electrode monomers havemaxGreater than whole membrane electrode monomers
Upper voltage limit threshold value Umax_limit, and the minimum U for the real-time working voltage value that all membrane electrode monomer hasminLess than whole
The lower voltage limit threshold value U of membrane electrode monomermin_limit, judge the membrane electrode in the proton exchange membrane h2 fuel cell stack at this time
There are abnormal conditions in monomer, and hydrogen fuel cell main control unit enters stopping alarm state, alarm outward in real time (such as pass through touching
Sounding light crossing-signal carries out sound-light alarm), otherwise, continue to execute preset air pump rotational speed regulation operation；
The preset air pump rotational speed regulation operation are as follows: if whole membrane electrode monomer real-time working average voltage Uav
Greater than the upper voltage limit threshold value U of whole membrane electrode monomersmax_limit, illustrate in the proton exchange membrane h2 fuel cell stack at this time
Air mass flow supply it is excessively high, then send control signal to air pump, lower the revolving speed of air pump；
If whole membrane electrode monomer real-time working average voltage UavLess than the lower voltage limit threshold of whole membrane electrode monomers
Value Umin_limit, illustrate that the air mass flow supply in the proton exchange membrane h2 fuel cell stack at this time is too low, then send control letter
Number give air pump, raise the revolving speed of air pump.
For the utility model, it should be noted that for whole multiple membrane electrode monomers, upper voltage limit threshold therein
Value Umax_limitWith lower voltage limit threshold value Umin_limitCalculation method be according to the load of formula above-mentioned (1) and testboard bay try
It tests data to obtain, the voltage bound threshold value and h2 fuel cell stack material, h2 fuel cell stack model, temperature of membrane electrode monomer
The parameters such as pressure value, output current values are related.
In the present invention, it should be noted that the lower voltage limit threshold value U of whole membrane electrode monomersmin_limitCalculating
Formula are as follows: Umin_limit=Umin-(Uav-Umin)。
The upper voltage limit threshold value U of whole membrane electrode monomersmax_limitCalculation formula are as follows: Umax_limit=Umax+(Umax-
Uav)。
The best operating point voltage value U of whole membrane electrode monomersbestCalculation formula are as follows:
Ubest=(Umin_limit+Umax_limit)/2。
In practical applications, it is difficult to realize the measurement for the water vapour pressure in h2 fuel cell stack, so in rack
The data of water vapour pressure are not measured in test.
For example, illustrating the upper voltage limit threshold value U of whole membrane electrode monomers by taking a kind of h2 fuel cell stack as an examplemax_limitWith
Lower voltage limit threshold value Umin_limit, best operating point voltage value UbestThe calculated case of equal numerical value.Referring to shown in the following table 1.
Table 1:
In the present invention, in specific implementation, the hydrogen fuel cell main control unit is also used to when the proton exchange
In the output current value of film h2 fuel cell stack and the proton exchange membrane h2 fuel cell stack inside each membrane electrode monomer
Temperature value and hydrogen, oxygen pressure value, there are when abnormal conditions, into stopping alarm state, alarm is (such as logical outward in real time
It crosses triggering combined aural and visual alarm and carries out sound-light alarm).
It should be noted that when the output current value of the proton exchange membrane h2 fuel cell stack and the proton are handed over
The pressure value of the temperature value and hydrogen, oxygen in film h2 fuel cell stack inside each membrane electrode monomer is changed, is more than that correspondence is preset
When numerical upper limits or lower limit, illustrate that there are abnormal conditions.
In specific implementation, the preset air pump rotational speed regulation operation, preferably are as follows: by adjusting the revolving speed of air pump,
So that the real-time working voltage value of membrane electrode monomer (is detected by membrane electrode monomer voltage in proton exchange membrane h2 fuel cell stack
Unit is read) it can balance near best operating point.
As previously mentioned, the best operating point voltage value U of whole membrane electrode monomersbestCalculation formula are as follows: Ubest=
(Umin_limit+Umax_limit)/2。
In the present invention, in specific implementation, the membrane electrode monomer voltage detection unit passes through controller LAN
CAN communication bus is connected with the hydrogen fuel cell main control unit, so as to it is reliable, rapidly by each membrane electrode monomer
Real-time working voltage value be sent to hydrogen fuel cell main control unit.
It should be noted that being fired for the utility model according to mentioned-above formula (1) and from proton exchange film hydrogen
From the viewpoint of expecting battery control system, in two kinds of deterioration modes of aforementioned membrane electrode, the height electricity of proton exchange membrane electrode
Position and current potential circulatory problems, caused catalyst carbon support corrosion and platinum grain coarsening problem, can use optimizing regulation
The control mode of the air mass flow supply of proton exchange membrane h2 fuel cell stack, makes proton exchange membrane h2 fuel cell stack to reach
The real-time working voltage value of middle membrane electrode monomer can balance near best operating point, to alleviate film in h2 fuel cell stack
The performance degradation of electrode promotes the overall work service life of fuel cell pack.
In the present invention, in specific implementation, the hydrogen fuel cell main control unit can be dedicated embedded control
Unit, programmable controller PLC, central processor CPU, digital signal processor DSP or single-chip microprocessor MCU processed.
It should be noted that for the utility model, by the temperature for detecting proton exchange membrane h2 fuel cell stack first
Pressure sensor real time value and output electric current real time value are spent, is calculated on the voltage of membrane electrode monomer of h2 fuel cell stack
Threshold value and lower threshold are limited, the real-time voltage value of the membrane electrode monomer of h2 fuel cell stack is then detected again, is finally fired according to hydrogen
Expect the peak of membrane electrode monomer real-time working voltage value and the real-time working voltage value of minimum, membrane electrode monomer in battery pile
Average value according to comparison result, control proton is gone to hand over compared with the upper voltage limit threshold value and lower threshold of membrane electrode monomer
The tachometer value of film h2 fuel cell stack air pump is changed, to reach under automobile-used working condition, real-time optimization adjusts proton exchange membrane
The air mass flow of h2 fuel cell stack supplies, and h2 fuel cell stack membrane electrode monomer operating voltage is enable to balance in best effort
Near point, to alleviate h2 fuel cell stack membrane electrode performance degradation, the proton exchange film hydrogen fuel cell stack operation service life is promoted.
Fig. 2 is the stream of the both air flow modulation method provided by the utility model for proton exchange membrane h2 fuel cell stack
Cheng Tu.
It further include the both air flow modulation method for proton exchange membrane h2 fuel cell stack for the utility model, packet
Include following steps:
Step 1: hydrogen fuel cell main control unit reads the temperature and pressure transmitter of h2 fuel cell stack by ADC interface
The real time value (pressure value of temperature value and hydrogen, oxygen including the proton exchange membrane h2 fuel cell stack) and electric current of acquisition
The electric current real time value (output current value of the i.e. described proton exchange membrane h2 fuel cell stack) of sensor acquisition output；
Step 2: if the output current values of h2 fuel cell stack temperature and pressure transmitter numerical value or current sensor are different
Often, then h2 fuel cell stack main control unit enters stopping alarm state；If continued to execute following without the above abnormal conditions
The step of three；
It should be noted that when the output current value of the proton exchange membrane h2 fuel cell stack and the proton are handed over
The pressure value of the temperature value and hydrogen, oxygen inside film h2 fuel cell stack is changed, when being more than corresponding preset numerical upper limits or lower limit,
Illustrate that there are abnormal conditions.
Step 3: hydrogen fuel cell main control unit is according to the defeated of the real time value of temperature and pressure transmitter and current sensor
Electric current real time value out calculates the upper voltage limit threshold value U of whole membrane electrode monomers in h2 fuel cell stackmax_limitWith lower limit threshold
Value Umin_limit.Wherein, the calculation method of membrane electrode monomer voltage bound threshold value is according to the negative of formula (1) and testboard bay
Test data is carried to obtain, the voltage bound threshold value of membrane electrode monomer and h2 fuel cell stack material, h2 fuel cell stack model,
The parameters such as temperature, pressure numerical value, output current values are related；It has been illustrated, has been not repeated herein above.
Step 4: hydrogen fuel cell main control unit receives what membrane electrode monomer voltage detection unit reported by CAN bus
The real-time working voltage data U of each membrane electrode monomer0~Un(n is membrane electrode monomer in proton exchange membrane h2 fuel cell stack
Sum)；
Step 5: hydrogen fuel cell main control unit is according to membrane electrode monomer real-time working voltage data U0~Un, obtain all
The peak U for the real-time working voltage value that membrane electrode monomer hasmaxWith minimum Umin, and by operation of averaging, it calculates
Obtain the real-time working average voltage U of whole membrane electrode monomersav；
Step 6: if there is UmaxGreater than Umax_limitAnd UminLess than Umin_limitAbnormal conditions, then illustrate the hydrogen
Membrane electrode monomer in fuel cell pack itself has existed exception, and hydrogen fuel cell main control unit enters stopping alarm state；
If entering step seven without above situation；
Step 7: if UavGreater than Umax_limit, then illustrate that the air mass flow supply in h2 fuel cell stack at this time is excessively high,
Hydrogen fuel cell main control unit lowers air revolution speed by air pump control interface；
Step 8: if UavLess than Umin_limit, then illustrate that the air mass flow supply in h2 fuel cell stack at this time is too low,
Hydrogen fuel cell main control unit raises the revolving speed of air pump by air pump control interface；
Step 9: control flow returns to step 1, so circulation executes repeatedly, until system-down exits.
For the utility model, the circuit for the membrane electrode monomer voltage detection unit having institute as shown in figs. 3 to 9
Show.
Membrane electrode monomer voltage detection unit uses MC912XEP100 as main control MCU, and uses AQW214 photoelectric coupling
Device is as isolation selector channel MUX.The on state of isolation optocoupler AQW214 in membrane electrode monomer voltage detection cell circuit, by
The GPIO gate pulse of MC912XEP100 main control MCU controls, when the GPIO pin of MC912XEP100 is high level, optocoupler
AQW214 conducting, fuel pile monomer membrane voltage detection input C00_IN~C63_IN according to MCU gate pulse MUX when
Sequence, the conducting pin through isolation optocoupler sequentially enter the IN+ and IN- of difference amplifier OPA, and the output of difference amplifier is connected to height
Input pin VIN0, the MC912XEP100 main control MCU of fast analog-digital converter AD7321 passes through CS/PK5, SCK/PT5, DIN/
PT7, DOUT/PT6 pin high speed read the voltage data value of the membrane electrode monomer through AD7321 acquisition conversion, and logical by CAN
Bus transceiver CTM1051KT is interrogated, hydrogen fuel cell main control unit is reported to.
Compared with prior art, the utility model has advantageous effects below:
1, the output C-V characteristic of proton exchange membrane h2 fuel cell stack is not only current related with output, but also and hydrogen fuel
The parameters such as battery pile material, h2 fuel cell stack model, temperature, pressure numerical value are closely related, and therefore, the utility model is than existing
The method used in technology is more reasonable, more acurrate.
2, the content that the method used in the prior art is detected without reference to h2 fuel cell stack membrane electrode monomer voltage, nothing
Method is to the membrane electrode high potential and current potential circulation implementing monitoring in h2 fuel cell stack critical component membrane electrode deterioration mode.And it is right
In the utility model, it is capable of the voltage operation data of real-time detection membrane electrode monomer, and can be according to film in h2 fuel cell stack
The average value of the peak and minimum of electrode monomer real-time working voltage value, the real-time working voltage value of membrane electrode monomer, with
The upper voltage limit threshold value of membrane electrode monomer compares with lower threshold, according to comparing as a result, removing control h2 fuel cell stack
The tachometer value of air pump, therefore, the utility model can be under automobile-used working conditions, and real-time optimization adjusts h2 fuel cell stack
Air mass flow supply, enables h2 fuel cell stack membrane electrode monomer operating voltage to balance near best operating point, thus slow
H2 fuel cell stack membrane electrode performance degradation is solved, the proton exchange film hydrogen fuel cell stack operation service life is promoted.
In conclusion compared with prior art, it is provided by the utility model a kind of for proton exchange membrane hydrogen fuel electricity
Proton exchange membrane hydrogen fuel cell can be effectively relieved under automobile-used working condition in the air flow adjusting apparatus of Chi Dui
Membrane electrode high potential and current potential circulatory problems in heap in the deterioration mode of membrane electrode alleviate membrane electrode in h2 fuel cell stack
Performance degradation promotes the overall work service life of h2 fuel cell stack, is conducive to promote and apply, and has great practice significance.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the protection scope of the utility model.
Claims (5)
1. a kind of air flow adjusting apparatus for proton exchange membrane h2 fuel cell stack, which is characterized in that including membrane electrode
Monomer voltage detection unit, hydrogen fuel cell main control unit, air pump, temperature and pressure transmitter and current sensor, in which:
Proton exchange membrane h2 fuel cell stack is constituted by multiple membrane electrodes are monomer series-connected；
The output cathode of proton exchange membrane h2 fuel cell stack is connected by current sensor with the positive terminal of load, and proton is handed over
The output negative pole for changing film h2 fuel cell stack is connected with the negative pole end of load；
Current sensor is then sent to hydrogen combustion for acquiring the output current value of the proton exchange membrane h2 fuel cell stack
Expect battery main control unit；
Multiple temperature and pressure transmitters are separately mounted to the inside of proton exchange membrane h2 fuel cell stack, for acquiring institute in real time
The temperature value of proton exchange membrane h2 fuel cell stack and the pressure value of hydrogen, oxygen are stated, hydrogen fuel cell master control list is then sent to
Member；
Membrane electrode monomer voltage detection unit is connected with the both ends of each membrane electrode monomer respectively, for acquiring each film electricity
The real-time working voltage value of pole monomer, is then sent to hydrogen fuel cell main control unit；
Air pump, for external oxygen to be input in the proton exchange membrane h2 fuel cell stack, to provide hydrogen fuel electricity
Oxygen required for Chi Dui works；
Hydrogen fuel cell main control unit is detected with current sensor, temperature and pressure transmitter and membrane electrode monomer voltage single respectively
Member is connected, for receiving the output current value for the proton exchange membrane h2 fuel cell stack that the current sensor is sent,
Receive the temperature value for the proton exchange membrane h2 fuel cell stack that the temperature and pressure transmitter is sent and the pressure of hydrogen, oxygen
Value, and receive the real-time working voltage value for each membrane electrode monomer that the membrane electrode monomer voltage detection unit is sent；
The hydrogen fuel cell main control unit, is also connected with air pump, corresponding to adjust for controlling rule according to preset operation
The revolving speed of whole air pump, to adjust the air mass flow supply of proton exchange membrane h2 fuel cell stack.
2. air flow adjusting apparatus as described in claim 1, which is characterized in that the preset operation control rule, tool
Body is as follows:
The hydrogen fuel cell main control unit, according to the output current value of the proton exchange membrane h2 fuel cell stack, Yi Jigen
According to the temperature value of the proton exchange membrane h2 fuel cell stack and the pressure value of hydrogen, oxygen, calculates and obtain the proton exchange membrane
The upper voltage limit threshold value U for the whole membrane electrode monomers having in h2 fuel cell stackmax_limitWith lower voltage limit threshold value Umin_limit；
Meanwhile the hydrogen fuel cell main control unit, each film sent also according to the membrane electrode monomer voltage detection unit
The real-time working voltage value of electrode monomer directly obtains the peak for the real-time working voltage value that whole membrane electrode monomers have
UmaxWith minimum Umin, and by operation of averaging, calculate the real-time working average voltage for obtaining whole membrane electrode monomers
Uav；
If the peak U for the real-time working voltage value that whole membrane electrode monomers havemaxGreater than the voltage of whole membrane electrode monomers
Upper limit threshold Umax_limit, and the minimum U for the real-time working voltage value that all membrane electrode monomer hasminLess than whole film electricity
The lower voltage limit threshold value U of pole monomermin_limit, judge the membrane electrode monomer in the proton exchange membrane h2 fuel cell stack at this time
There are abnormal conditions, hydrogen fuel cell main control unit enters stopping alarm state, and alarm outward, otherwise, continues to execute in real time
Preset air pump rotational speed regulation operation.
3. air flow adjusting apparatus as claimed in claim 2, which is characterized in that the preset air pump rotational speed regulation behaviour
As: if whole membrane electrode monomer real-time working average voltage UavGreater than the upper voltage limit threshold value of whole membrane electrode monomers
Umax_limit, illustrate that the air mass flow supply in the proton exchange membrane h2 fuel cell stack at this time is excessively high, then send control signal
To air pump, the revolving speed of air pump is lowered；
If whole membrane electrode monomer real-time working average voltage UavLess than the lower voltage limit threshold value of whole membrane electrode monomers
Umin_limit, illustrate that the air mass flow supply in the proton exchange membrane h2 fuel cell stack at this time is too low, then send control signal
To air pump, the revolving speed of air pump is raised.
4. air flow adjusting apparatus as described in claim 1, which is characterized in that the membrane electrode monomer voltage detection unit
It is connected by CAN communication bus with the hydrogen fuel cell main control unit.
5. air flow adjusting apparatus as described in claim 1, which is characterized in that the hydrogen fuel cell main control unit is embedding
Enter formula control unit, programmable controller PLC, central processor CPU, digital signal processor DSP or single-chip microprocessor MCU.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109256573A (en) * | 2018-10-24 | 2019-01-22 | 天津中德应用技术大学 | Both air flow modulation method and device for proton exchange membrane h2 fuel cell stack |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109256573A (en) * | 2018-10-24 | 2019-01-22 | 天津中德应用技术大学 | Both air flow modulation method and device for proton exchange membrane h2 fuel cell stack |
| CN109256573B (en) * | 2018-10-24 | 2023-05-26 | 天津中德应用技术大学 | Air flow regulating method and device for proton exchange membrane hydrogen fuel cell stack |
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