CN112086664B - Fuel cell automobile air filtering system and control method thereof - Google Patents

Fuel cell automobile air filtering system and control method thereof Download PDF

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CN112086664B
CN112086664B CN202010980257.3A CN202010980257A CN112086664B CN 112086664 B CN112086664 B CN 112086664B CN 202010980257 A CN202010980257 A CN 202010980257A CN 112086664 B CN112086664 B CN 112086664B
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CN112086664A (en
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宫熔
张新丰
王明锐
王成
杨高超
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Dongfeng Motor Corp
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • 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
    • H01M8/04791—Concentration; Density
    • H01M8/04798—Concentration; Density of fuel cell reactants
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04992—Processes for controlling fuel cells or fuel cell systems characterised by the implementation of mathematical or computational algorithms, e.g. feedback control loops, fuzzy logic, neural networks or artificial intelligence
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

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Abstract

The invention discloses a fuel cell automobile air filtering system and a control method thereof, wherein the air filtering system comprises an air pipeline, an air filter, a particulate matter concentration sensor, a harmful gas concentration sensor and a three-way valve, wherein the air filter, the particulate matter concentration sensor, the harmful gas concentration sensor and the three-way valve can be switched to open two outlets are sequentially arranged on the air pipeline along the air inlet direction; the device is characterized by further comprising a positioning module and a fuel cell controller, wherein the positioning module, the particulate matter concentration sensor, the harmful gas concentration sensor and the three-way valve are in signal connection with the fuel cell controller. The fuel cell controller can adjust the control strategy according to the concentration index data, thereby ensuring the normal operation of the chemical reaction of the galvanic pile.

Description

Fuel cell automobile air filtering system and control method thereof
Technical Field
The invention relates to a hydrogen fuel cell, in particular to an air filtering system of a fuel cell automobile and a control method thereof.
Background
As a big automobile country, China has a huge automobile market, brings economic benefits and is accompanied with huge energy consumption and environmental pollution. With the increasingly intense competition in the automotive field, enterprises and colleges have begun to engage in research on hydrogen fuel cell automobiles. At present, the key technology of fuel cell vehicles has been fundamentally broken through, but there is still a need to further improve and upgrade the fuel cell industrialization technology, so that the industrialization technology is improvedAnd (5) maturing. The fuel cell automobile needs oxygen in the air to chemically react with hydrogen in the hydrogen bottle in the process of generating electricity. Particulate matter in air and H2S、SO2、NO2And the harmful gases can cause performance loss to the fuel cell automobile and influence the functions and the working efficiency of parts in the automobile. And the air flow channel in the galvanic pile is blocked, the activity of the cathode and anode catalysts is reduced, the power generation efficiency is reduced, and even the galvanic pile is permanently damaged.
Therefore, it is urgently needed to develop a fuel cell automobile air filtration system with simple structure and convenient operation and a control method thereof, so as to ensure the power generation efficiency of the fuel cell and prolong the service life of the stack.
Disclosure of Invention
The invention aims to solve the defects of the background technology and provide a fuel cell automobile air filtering system with simple structure and convenient operation and a control method thereof, thereby ensuring the power generation efficiency of a fuel cell and prolonging the service life of a pile.
The technical scheme of the invention is as follows: a fuel cell automobile air filtering system is characterized by comprising an air pipeline, an air filter, a particulate matter concentration sensor, a harmful gas concentration sensor and a three-way valve, wherein the air filter, the particulate matter concentration sensor, the harmful gas concentration sensor and the three-way valve can switch and open two outlets are sequentially arranged on the air pipeline along an air inlet direction;
the device is characterized by further comprising a positioning module and a fuel cell controller, wherein the positioning module, the particulate matter concentration sensor, the harmful gas concentration sensor and the three-way valve are in signal connection with the fuel cell controller.
Preferably, the three-way valve is provided with a first outlet and a second outlet, the first outlet is communicated to the electric pile through an air path system, and the second outlet is provided with a circulating pipeline communicated to the air pipeline in front of an air filter.
Furthermore, the fuel cell controller switches and controls the opening of the first outlet and the second outlet of the three-way valve according to the positioning information of the positioning module and the detection data of the particulate matter concentration sensor and the harmful gas concentration sensor.
The invention also provides a control method of any fuel cell automobile air filtering system, which comprises the following steps:
s1, opening the inlet of the three-way valve and the outlet leading to the circulating pipeline, closing the outlet leading to the galvanic pile, starting the air filter to suck air for filtering, controlling the particulate matter concentration sensor and the harmful gas concentration sensor to monitor a plurality of concentration indexes in real time and collect data, wherein the plurality of concentration indexes comprise particulate matter concentration and H2S concentration, SO2Concentration, NO2Concentration, and simultaneously controlling a positioning module to collect the current vehicle positioning information and determining the time of a detection unit as T according to whether the positioning information is positioned in a high-concentration harmful gas area database1Or T2，T1＜T2，；
S2, calculating the time T of the detecting unit determined by the positioning information1Or T2Average value C of each of all concentration indexesaAnd corresponding preset limit value CmaxComparing, if not exceeding the preset limit value CmaxControlling the inlet of the three-way valve and the outlet leading to the galvanic pile to be opened and the outlet leading to the circulating pipeline to be closed, and enabling air to flow into the galvanic pile for reaction; if there is at least one average value C of concentration indicatorsaExceeds a predetermined limit CmaxThen a repeat detection process is performed.
Further, the repeated detection processing in step S2 includes:
a. at the next detection unit time T1The mean value C of all concentration indexes is internally calculatedaAnd corresponding preset limit value CmaxComparing;
b. if the average value C of all concentration indexesaDo not exceed the corresponding preset limit value CmaxControlling the inlet of the three-way valve and the outlet leading to the galvanic pile to be opened and the outlet leading to the circulating pipeline to be closed, and enabling air to flow into the galvanic pile for reaction; if there is at least one average value C of concentration indicatorsaExceeds a predetermined limit CmaxThen, thenRepeating step ab;
c. if it reaches Nth1Time per detection unit T1Average C of at least one concentration indicatoraExceeds a predetermined limit CmaxControlling the inlet and outlet of the three-way valve to open and the outlet of the fuel cell to close, and controlling the inlet and outlet of the fuel cell to close, wherein air flows into the fuel cell to react, the fuel cell controller starts to limit the whole fuel cell, and N1Is a preset number.
Further, the vehicle limitation processing in step c includes:
the fuel cell controller calculates the maximum value E of the change amplitude of the output current of the galvanic pile according to the current output current of the galvanic pile and the minimum value of the voltage of the single sheetmaxAnd maximum value F of change rate of output current of electric pilemax；
At each subsequent detection unit time T1In the method, an overrun factor Y of all concentration indexes is calculated, and the overrun factor Y is an average value C of all concentration indexesaCorresponding preset limit value CmaxThe difference with respect to a predetermined threshold CmaxAccording to the maximum value Y of all the overrun factors YmaxCarrying out overrun grade evaluation, wherein the overrun grade is divided into three grades ABC from small to large, and the fuel cell controller carries out evaluation according to the time T of each detection unit1To limit the next detection unit time T1The change amplitude of the output current of the galvanic pile and the change rate of the output current of the galvanic pile in the reactor;
if it reaches Nth2Time per detection unit T1The overrun grade is continuously C grade and N grade2If the number is the preset number, an alarm signal is sent to the instrument to remind a driver to stop the vehicle or exit the area as soon as possible.
Further, according to the maximum value Y of all the overrun factors YmaxThe overrun rating was rated as: y ismaxGrade A is less than or equal to 30 percent, grade Y is less than 30 percentmaxLess than or equal to 60 percent is B grade and YmaxAnd the grade C is more than 60 percent.
Further, according to each detection unit time T1To limit the next detection unit time T1Inner electric pile output current change amplitude and electric pile output electricityA rheology rate comprising:
when the overrun grade is A grade, the next detection unit time T is set1The change amplitude of the output current of the inner electric pile and the change rate of the output current of the electric pile are respectively reduced to the maximum value E of the change of the output current of the electric pilemaxAnd maximum value F of change rate of output current of electric pilemax60-80% of the total;
when the overrun grade is B grade, the next detection unit time T is set1The change amplitude of the output current of the inner electric pile and the change rate of the output current of the electric pile are respectively reduced to the maximum value E of the change of the output current of the electric pilemaxAnd maximum value F of change rate of output current of electric pilemax40-60% of the total;
when the overrun grade is C grade, the next detection unit time T is set1The change amplitude of the output current of the inner electric pile and the change rate of the output current of the electric pile are respectively reduced to the maximum value E of the change of the output current of the electric pilemaxAnd maximum value F of change rate of output current of electric pilemax20-40% of the total.
Preferably, the high concentration harmful gas region database is preset in the fuel cell controller in step S1, T1＝60s、T2＝300s。
Preferably, the high concentration harmful gas area database includes all high concentration harmful gas areas of the current city, and the high concentration harmful gas area is an area in which an average value of at least one concentration index exceeds a corresponding limit value within a prescribed time period.
The invention has the beneficial effects that:
1. the air pipeline is provided with an air filter for filtering particulate matters and harmful gases in the air as far as possible, and two outlets of the three-way valve can be selectively led into the galvanic pile or enter the air pipeline again for filtering according to the air quality so as to prevent the unsatisfactory air from entering the galvanic pile to cause damage.
2. Be equipped with GPS positioning system, when the vehicle was through impurity such as mill, steam power plant and the higher region of harmful gas degree concentration, with positional information transmission to fuel cell controller, fuel cell controller can be according to concentration index data adjustment control strategy, directly lets in the pile or further filters to guarantee that pile chemical reaction normally goes on.
3. After air is filtered by an air filter, concentration indexes are detected in real time by detecting instruments (a particulate matter concentration sensor and a harmful gas concentration sensor), and different control strategies are implemented by detecting whether the average value of each concentration index in unit time exceeds a preset limit value. If not, the reactor can be directly introduced into the reactor for reaction, and if the N is continuous1Time per detection unit T1And if the average value of the concentration indexes exceeds the limit value, the whole vehicle limiting treatment is started, the air demand is reduced, and the galvanic pile is protected as much as possible.
4. The limitation of the whole vehicle is not directly limited according to a fixed proportion, but the air quality at the moment is graded, the change amplitude of the output current of the galvanic pile and the change rate of the output current of the galvanic pile are limited according to the overrun grade, and the power requirements of the whole vehicle at different grades are met. And the overrun grade evaluation is carried out at each detection unit time, so that the whole vehicle power in the next detection unit time is limited and adjusted in real time according to the air quality change.
Drawings
FIG. 1 is a structural view of an air filtration system of a fuel cell vehicle according to the present invention
FIG. 2 is a flow chart of a control method
Wherein: the system comprises an air pipeline 1, an air filter 3, a particulate matter concentration sensor 4, a harmful gas concentration sensor 5, a three-way valve 6, a circulating pipeline 7, a positioning module 8, a fuel cell controller 9, an air path system 10, a galvanic pile 51, a first outlet 52 and a second outlet.
Detailed Description
The following specific examples further illustrate the invention in detail.
As shown in fig. 1, the fuel cell automobile air filtration system provided by the present invention comprises an air pipeline 1, and an air filter 2, a particulate matter concentration sensor 3, a harmful gas concentration sensor 4, and a three-way valve 5 capable of switching and opening two outlets, which are sequentially arranged on the air pipeline 1 along an air inlet direction, wherein an air inlet end (left end in fig. 1) of the air pipeline 1 is communicated with the atmosphere, an air outlet end (right end in fig. 1) is connected with an inlet of the three-way valve 5, one outlet of the three-way valve 5 is communicated with a stack 10, and the other outlet is provided with a circulation pipeline 6 communicated with the front of the air filter 2 on the air pipeline 1; still include orientation module 7 and fuel cell controller 8, orientation module 7, particulate matter concentration sensor 3, harmful gas concentration sensor 4, three-way valve 5 all are connected with fuel cell controller 8 through the CAN bus, and operating condition is controlled by fuel cell controller 8.
In this embodiment, the three-way valve 5 is provided with a first outlet 51 and a second outlet 52, the first outlet 51 is communicated to the electric pile 10 through the air path system 9, and the second outlet 52 is provided with a circulating pipeline 6 communicated to the front of the air filter 2 on the air pipeline 1; the fuel cell controller 8 controls the switching and opening of the first outlet 51 and the second outlet 52 of the three-way valve 5 according to the positioning information of the positioning module 7 and the detection data of the particulate matter concentration sensor 3 and the harmful gas concentration sensor 4.
The air filter 2 is used for filtering particles and harmful gases in the air, the particle concentration sensor 3 is used for detecting the particle concentration in the air, and the harmful gas concentration sensor 4 is used for detecting H2S、SO2、NO2When the concentration of harmful gas is equal, the three-way valve 5 is used for controlling the air flow direction of the air outlet end of the air pipeline 1, and the positioning module 7 is used for collecting the current geographical position information of the whole vehicle.
The positioning module 7 can be an existing GPS module or a beidou module, but is not limited to these two.
As shown in fig. 2, the present invention further provides a control method of the air filtration system of the fuel cell vehicle, including the following steps:
s1, the fuel cell controller 8 opens the inlet and the second outlet 52 of the three-way valve 5 and closes the first outlet 51, the air filter 2 is started to suck air for filtration, the particulate matter concentration sensor 3 and the harmful gas concentration sensor 4 are controlled to monitor a plurality of concentration indexes in real time and collect data, and the plurality of concentration indexes comprise particulate matter concentration and H2S concentration, SO2Concentration, NO2Concentrations, denoted C1, H1, S1, N1, respectively;
while fuel cell controller 8 controls positioning module 7Collecting the current vehicle positioning information, and determining the time of the detection unit as T according to whether the positioning information is in the high-concentration harmful gas area database preset by the fuel cell controller 81Or T2("is T1And "NO" is T2)，T1＝60s、T2If the vehicle enters a high concentration region for 300s, the concentration of particulate matter and harmful gas in the air increases, and the concentration variation tendency needs to be calculated more accurately, so that T is set1＜T2；
S2, calculating the average value C of all concentration indexes (respectively marked as C1, H1, S1 and N1) in the detection unit time (60S or 300S) determined by the positioning informationa(MC 1, MH1, MS1, MN1, respectively) and corresponding predetermined threshold Cmax(C3, H3, S3, N3, respectively) if none of them exceeds the predetermined threshold CmaxNamely, C3 with MC1 being more than or equal to, H3 with MH1 being more than or equal to, S3 with MS1 being more than or equal to, N3 with MN1 being more than or equal to simultaneously, the inlet and the first outlet 51 of the three-way valve 5 are controlled to be opened, the second outlet 52 is controlled to be closed, and air flows into the electric pile 10 for reaction; if there is at least one average value C of concentration indicatorsaExceeds a predetermined limit CmaxThen, a duplicate detection process is performed, the duplicate detection process including:
a. at the next detection unit time T1(60s) calculating the average value C of all concentration indexesaAnd corresponding preset limit value CmaxComparing;
b. if the average value C of all concentration indexes is reachedaDo not exceed the corresponding preset limit value CmaxThen controlling the inlet of the three-way valve 5 and the outlet leading to the electric pile 10 to be opened and the outlet leading to the circulating pipeline 6 to be closed, and leading the air to flow into the electric pile 10 for reaction; if there is at least one average value C of concentration indicatorsaExceeds a predetermined limit CmaxThen repeat step ab;
c. if it reaches Nth1Time per detection unit T1(60s) still at least one mean value C of concentration indicatorsaExceeds a predetermined limit CmaxThen the inlet and the first outlet 51 of the three-way valve 5 are controlled to be opened, the second outlet 52 is controlled to be closed, the air flows into the electric pile 10 to react, and the fuel cell controller 8 starts the whole vehicleLimitation processing, N1Is a preset number (this embodiment N)13), the entire vehicle limiting process includes:
the fuel cell controller 8 calculates the maximum value E of the change amplitude of the output current of the galvanic pile according to the current galvanic pile output current and the minimum value of the single-chip voltagemaxAnd maximum value F of change rate of output current of electric pilemax；
At each subsequent detection unit time T1Within (60s), calculating the overrun factor Y of all concentration indexes, wherein the overrun factor Y is the average value C of all concentration indexesaCorresponding preset limit value CmaxThe difference with respect to a predetermined threshold CmaxIn percent (i.e. Y ═ C)a-Cmax)/CmaxAccording to the maximum value Y of all the overrun factors YmaxEvaluation of overrun grade, YmaxGrade A is less than or equal to 30 percent, grade Y is less than 30 percentmaxLess than or equal to 60 percent is B grade and YmaxMore than 60% is C grade;
the overrun grade is divided into ABC grade from small to large, and the fuel cell controller 8 is used for detecting the unit time T according to each unit1To limit the next detection unit time T1The change amplitude of the output current of the galvanic pile and the change rate of the output current of the galvanic pile are specifically as follows:
when the overrun grade is A grade, the next detection unit time T is set1The change amplitude of the output current of the inner electric pile and the change rate of the output current of the electric pile are respectively reduced to the maximum value E of the change of the output current of the electric pilemaxAnd maximum value F of change rate of output current of electric pilemax60-80% of the total;
when the overrun grade is B grade, the next detection unit time T is set1The change amplitude of the output current of the inner electric pile and the change rate of the output current of the electric pile are respectively reduced to the maximum value E of the change of the output current of the electric pilemaxAnd maximum value F of change rate of output current of electric pilemax40-60% of the total;
when the overrun grade is C grade, the next detection unit time T is set1The change amplitude of the output current of the inner electric pile and the change rate of the output current of the electric pile are respectively reduced to the maximum value E of the change of the output current of the electric pilemaxAnd stack outputMaximum value of rate of change of current Fmax20-40% of the total.
The higher the overrun level is, the more the electric pile output current amplitude is reduced, the faster the change rate is, and the whole vehicle power is limited by reducing the electric pile output current, so that the air demand flow is reduced, and the purpose of protecting the electric pile is achieved.
If it reaches Nth2Time per detection unit T1The overrun grade is continuously C grade and N grade2Is a preset number (this embodiment N)25), namely the overrun level is C level and lasts for 300s, an alarm signal is sent to the meter to remind the driver to stop or exit the area as soon as possible.
In this embodiment, the high concentration harmful gas area database includes all high concentration harmful gas areas in the current city, and the high concentration harmful gas area is an area in which an average value of at least one concentration index exceeds a corresponding limit value within a specified time period, that is, an area in which at least one of the following four index concentrations is satisfied within the specified time period: mean value of particle concentration > Limit values C2, H2Average value of S concentration > Limit value H2、SO2Mean concentration value > Limit S2、NO2Mean concentration > limit N2.

Claims (7)

1. The control method of the fuel cell automobile air filtering system is characterized in that the fuel cell automobile air filtering system comprises an air pipeline (1), an air filter (2), a particulate matter concentration sensor (3), a harmful gas concentration sensor (4) and a three-way valve (5) which can switch and open two outlets, wherein the air filter (2), the particulate matter concentration sensor (3), the harmful gas concentration sensor and the three-way valve (5) are sequentially arranged on the air pipeline (1) along an air inlet direction, an air inlet end of the air pipeline (1) is communicated with the atmosphere, an air outlet end of the air pipeline is connected with an inlet of the three-way valve (5), one outlet of the three-way valve (5) is communicated with a pile (10), and the other outlet of the three-way valve is provided with a circulating pipeline (6) which is communicated with the front of the air filter (2) on the air pipeline (1); the device is characterized by also comprising a positioning module (7) and a fuel cell controller (8), wherein the positioning module (7), the particulate matter concentration sensor (3), the harmful gas concentration sensor (4) and the three-way valve (5) are in signal connection with the fuel cell controller (8);
the control method comprises the following steps:
s1, the fuel cell controller (8) opens the inlet of the three-way valve (5) and the outlet leading to the circulating pipeline (6), closes the outlet leading to the electric pile (10), starts the air filter (2) to suck air for filtration, controls the particulate matter concentration sensor (3) and the harmful gas concentration sensor (4) to monitor a plurality of concentration indexes in real time and collect data, and the plurality of concentration indexes comprise particulate matter concentration and H2S concentration, SO2Concentration, NO2Concentration, and simultaneously controlling a positioning module (7) to collect the current vehicle positioning information and determining that the time of a detection unit is T according to whether the positioning information is positioned in a high-concentration harmful gas area database1Or T2，T1＜T2；
S2, calculating the time T of the detecting unit determined by the positioning information1Or T2Average value C of each of all concentration indexesaAnd corresponding preset limit value CmaxComparing, if not exceeding the preset limit value CmaxThen controlling the inlet of the three-way valve (5) and the outlet leading to the galvanic pile (10) to be opened and the outlet leading to the circulating pipeline (6) to be closed, and leading the air to flow into the galvanic pile (10) for reaction; if there is at least one average value C of concentration indicatorsaExceeds a predetermined limit CmaxThen a repeat detection process is performed.
2. The method of controlling an air filter system for a fuel cell vehicle as claimed in claim 1, wherein said repeated detection process in step S2 includes:
a. at the next detection unit time T1The mean value C of all concentration indexes is internally calculatedaAnd corresponding preset limit value CmaxComparing;
b. if the average value C of all concentration indexesaDo not exceed the corresponding preset limit value CmaxThen controlling the inlet of the three-way valve (5) and the outlet leading to the galvanic pile (10) to be opened and the outlet leading to the circulating pipeline (6) to be closed, and leading the air to flow into the galvanic pile (10) for reaction; if there is at least one average value C of concentration indicatorsaExceeds a predetermined limit CmaxThen repeat step ab;
c. if it reaches Nth1Time per detection unit T1Average C of at least one concentration indicatoraExceeds a predetermined limit CmaxControlling the inlet of the three-way valve (5), the outlet of the fuel cell stack (10) to be opened and the outlet of the circulating pipeline (6) to be closed, leading air to flow into the fuel cell stack (10) for reaction, starting the whole vehicle limiting treatment by the fuel cell controller (8), and N1Is a preset number.
3. The method of controlling an air filter system of a fuel cell vehicle as set forth in claim 2, wherein the vehicle restriction processing in the step c includes:
the fuel cell controller (8) calculates the maximum value E of the change amplitude of the output current of the galvanic pile according to the current galvanic pile output current and the minimum value of the single-chip voltagemaxAnd maximum value F of change rate of output current of electric pilemax；
At each subsequent detection unit time T1In the method, an overrun factor Y of all concentration indexes is calculated, and the overrun factor Y is an average value C of all concentration indexesaCorresponding preset limit value CmaxThe difference with respect to a predetermined threshold CmaxAccording to the maximum value Y of all the overrun factors YmaxThe overrun grade is evaluated, the overrun grade is divided into ABC grade from small to large, and the fuel cell controller (8) evaluates the overrun grade according to the time T of each detection unit1To limit the next detection unit time T1The change amplitude of the output current of the galvanic pile and the change rate of the output current of the galvanic pile in the reactor;
if it reaches Nth2Time per detection unit T1The overrun grade is continuously C grade and N grade2If the number is the preset number, an alarm signal is sent to the instrument to remind a driver to stop the vehicle or exit the area as soon as possible.
4. A control method of a fuel cell vehicle air filter system as claimed in claim 3, characterized in that the maximum value Y among all the overrun factors Y is setmaxPerforming ultra-superThe limit rating was: y ismaxGrade A is less than or equal to 30 percent, grade Y is less than 30 percentmaxLess than or equal to 60 percent is B grade and YmaxAnd the grade C is more than 60 percent.
5. The method of controlling an air filter system for a fuel cell vehicle as claimed in claim 3, wherein the time T is determined according to each sensing unit1To limit the next detection unit time T1The change amplitude of the output current of the electric pile and the change rate of the output current of the electric pile in the device comprise:
when the overrun grade is A grade, the next detection unit time T is set1The change amplitude of the output current of the inner electric pile and the change rate of the output current of the electric pile are respectively reduced to the maximum value E of the change of the output current of the electric pilemaxAnd maximum value F of change rate of output current of electric pilemax60-80% of the total;
when the overrun grade is B grade, the next detection unit time T is set1The change amplitude of the output current of the inner electric pile and the change rate of the output current of the electric pile are respectively reduced to the maximum value E of the change of the output current of the electric pilemaxAnd maximum value F of change rate of output current of electric pilemax40-60% of the total;
when the overrun grade is C grade, the next detection unit time T is set1The change amplitude of the output current of the inner electric pile and the change rate of the output current of the electric pile are respectively reduced to the maximum value E of the change of the output current of the electric pilemaxAnd maximum value F of change rate of output current of electric pilemax20-40% of the total.
6. The control method of the air filter system for the fuel cell vehicle as claimed in claim 1, wherein the high concentration harmful gas region database is preset in the fuel cell controller (8) in step S1, T1=60s、T2=300s。
7. The method for controlling an air filter system of a fuel cell vehicle according to claim 1, wherein said high concentration harmful gas area database contains all high concentration harmful gas areas of the current city, and said high concentration harmful gas area is an area where an average value of at least one concentration index exceeds a corresponding limit value within a prescribed time period.
CN202010980257.3A 2020-09-17 2020-09-17 Fuel cell automobile air filtering system and control method thereof Active CN112086664B (en)

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