CN111864228A - System and method for dynamically adjusting air intake state of fuel cell stack - Google Patents
System and method for dynamically adjusting air intake state of fuel cell stack Download PDFInfo
- Publication number
- CN111864228A CN111864228A CN202010724020.9A CN202010724020A CN111864228A CN 111864228 A CN111864228 A CN 111864228A CN 202010724020 A CN202010724020 A CN 202010724020A CN 111864228 A CN111864228 A CN 111864228A
- Authority
- CN
- China
- Prior art keywords
- air
- sensor
- mass flow
- flow controller
- controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000005259 measurement Methods 0.000 claims abstract description 50
- 238000011144 upstream manufacturing Methods 0.000 claims description 13
- 238000011217 control strategy Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 19
- 238000013486 operation strategy Methods 0.000 description 16
- 230000008569 process Effects 0.000 description 10
- 238000012360 testing method Methods 0.000 description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000004043 responsiveness Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000011712 cell development Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Images
Classifications
-
- 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
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04126—Humidifying
-
- 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
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0432—Temperature; Ambient temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0438—Pressure; Ambient pressure; Flow
-
- 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
-
- 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
- H01M8/04828—Humidity; Water content
- H01M8/04835—Humidity; Water content of fuel cell reactants
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a system and a method for dynamically adjusting air intake state of a fuel cell stack, which comprises the following steps of obtaining measurement results of a second pressure sensor, a second temperature sensor and a dew point sensor through a controller; the controller modifies the operating strategy of the humidifier, the air heater and the air mass flow controller based on the measurements of the second pressure sensor, the second temperature sensor and the dew point sensor. The air pressure entering the tested piece of the pile is detected by the second pressure sensor, the second temperature sensor and the dew point sensor through closed-loop control, the controller corrects the working strategy of the air quality flow controller according to the gas state equation and the detection results of the second pressure sensor, the second temperature sensor and the dew point sensor, so that the air pressure, the temperature and the humidity entering the tested piece of the pile accord with target values, and the purpose of quickly and accurately controlling the air inlet pressure, the temperature and the humidity of the air is achieved.
Description
Technical Field
The invention relates to the technical field of new energy batteries, in particular to a system and a method for dynamically adjusting the air intake state of a fuel cell stack.
Background
The proton exchange membrane fuel cell is also called a fuel cell, and is considered as a new energy power generation system which is intensively developed in the future due to the advantages of environmental friendliness, high energy conversion rate, no noise, quick response and the like. Fuel cells generate electrical energy by electrochemical reactions using hydrogen and air as the reactant gases for the anode and cathode, respectively. In a fuel cell development project, a fuel cell stack is often used as a tested object, and hydrogen and air are supplied to the fuel cell stack through a certain device and a control strategy to simulate the working state of the fuel cell stack in a fuel cell system.
However, the conventional stack testing apparatus and control method are designed for the stack operating requirement under the steady-state condition, and require high stability of the air intake of hydrogen and air, and ensure the stability and accuracy of parameters such as temperature, humidity, pressure, flow rate and the like under the steady-state condition.
However, with the development of fuel cell technology and the promotion of commercialization, the requirements of simulation test on actual dynamic conditions in the fuel cell research and development process are more prominent, and how to accurately simulate the working state of a fuel cell system under the whole vehicle working condition, especially the air intake state, accurately and rapidly control the air intake pressure, flow, temperature and humidity, so as to fit the actual state to the maximum extent becomes a major difficulty to be solved at present.
Disclosure of Invention
In view of this, embodiments of the present invention provide a system and a method for dynamically adjusting an air intake state of a fuel cell stack, so as to solve the problem that an air intake module in a fuel cell system in the prior art cannot accurately and quickly control an intake pressure, a flow rate, a humidity, and a temperature of air.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
the invention provides a fuel cell stack air intake state dynamic regulation system in a first aspect, which comprises: the air humidifying tank, the air heater, the air mass flow controller, the second pressure sensor and the controller;
the air humidification tank and the air heater are disposed upstream of the air mass flow controller;
the second pressure sensor is arranged at the downstream of the air mass flow controller, and the downstream of the second pressure sensor is used for connecting a tested piece of the pile;
the controller is capable of modifying the operating strategy of the air mass flow controller based on the measurement from the second pressure sensor.
Preferably, the method further comprises the following steps: a first pressure sensor;
the first pressure sensor is disposed downstream of the air humidification tank and the air heater, upstream of the air mass flow controller;
the controller is capable of correcting the operating strategy of the air humidification tank and the air heater based on the measurement of the first pressure sensor.
Preferably, the method further comprises the following steps: a first temperature sensor;
the first temperature sensor is disposed downstream of the air humidification tank and the air heater, upstream of the air mass flow controller;
the controller is capable of correcting the operating strategy of the air humidification tank and the air heater based on the measurement of the first temperature sensor.
Preferably, the controller is capable of modifying the operating strategy of the air humidification tank and the air heater according to the modified operating strategy of the air mass flow controller.
Preferably, the method further comprises the following steps: a second temperature sensor;
the second temperature sensor is arranged at the downstream of the air mass flow controller, and the downstream of the second temperature sensor is used for connecting the tested piece of the pile;
the controller is capable of correcting the operating strategy of the air humidification tank, the air heater, and the air mass flow controller based on the measurement of the second temperature sensor.
Preferably, the method further comprises the following steps: a dew point sensor;
the dew point sensor is arranged at the downstream of the air mass flow controller, and the downstream of the dew point sensor is used for being connected with the tested piece of the galvanic pile;
the controller is capable of modifying the control strategy of the air humidification tank, the air heater and the air mass flow controller based on the measurement of the dew point sensor.
Preferably, the controller is capable of making a heating target temperature of the air heater not lower than the measurement result of the dew point sensor.
Preferably, the controller is capable of setting an operating strategy of the air mass flow controller according to an operating strategy of an evacuation backpressure valve.
The second aspect of the present invention discloses a method for dynamically adjusting the air intake state of a fuel cell stack, which adopts any one of the systems for dynamically adjusting the air intake state of a fuel cell stack disclosed in the first aspect of the present invention, and comprises:
obtaining measurement results of a second pressure sensor, a second temperature sensor and a dew point sensor;
correcting the operating strategy of the air humidification tank, air heater and air mass flow controller based on the measurements of the second pressure sensor, the second temperature sensor and the dew point sensor.
Preferably, the method further comprises the following steps:
obtaining measurement results of a first pressure sensor and a first temperature sensor;
correcting the operating strategies of the air heater and the air humidification tank and the air heater based on the corrected operating strategies of the air mass flow controller and the measurement results of the first pressure sensor and the first temperature sensor.
From the above, the invention discloses a system and a method for dynamically adjusting the air intake state of a fuel cell stack, wherein the measurement results of a second pressure sensor, a second temperature sensor and a dew point sensor are obtained by a controller; and correcting the operating strategy of the air humidification tank, the air heater and the air mass flow controller based on the measurements of the second pressure sensor, the second temperature sensor and the dew point sensor. The air pressure entering the tested piece of the galvanic pile is detected by using the second pressure sensor, the second temperature sensor and the dew point sensor through closed-loop control, the controller corrects the working strategy of the air quality flow controller according to a gas state equation and the detection results of the second pressure sensor, the second temperature sensor and the dew point sensor, so that the air pressure, the temperature and the humidity entering the tested piece of the galvanic pile conform to target values, and the purpose of quickly and accurately controlling the air inlet pressure, the temperature and the humidity of the air is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a system for dynamically adjusting an air intake state of a fuel cell stack according to an embodiment of the present invention;
FIG. 2 is a feedback flow chart of a fuel cell stack air intake state dynamic adjustment system according to an embodiment of the present invention;
FIG. 3 is a flow chart of a method for dynamically adjusting the air intake state of a fuel cell stack according to an embodiment of the present invention;
fig. 4 is a flowchart of an operation state of setting the air heater according to a measurement result of the first temperature sensor according to an embodiment of the present invention.
The device comprises an air inlet electromagnetic valve 1, an air humidifying tank 2, an air heater 3, an air mass flow controller 4, a galvanic pile tested piece 5, an emptying back pressure valve 6, a first pressure sensor 7, a first temperature sensor 8, a second pressure sensor 9, a second temperature sensor 10 and a dew point sensor 11.
Detailed Description
The invention relates to a dynamic adjusting system and a control method for the air inlet state of a fuel cell stack, in particular to a system and a control method for adjusting the air inlet temperature and humidity of air by an open-loop control method obtained by an early calibration process, and simultaneously controlling the air inlet flow and pressure of the air by a proportional valve which is as close to a tested piece as possible, and also relates to test system hardware and a structural layout thereof capable of realizing the control method.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
An embodiment of the present invention provides a system for dynamically adjusting an air intake state of a fuel cell stack, which is shown in fig. 1 and is a schematic structural diagram of the system for dynamically adjusting an air intake state of a fuel cell stack, and the system for dynamically adjusting an air intake state of a fuel cell stack includes: the method comprises the following steps: the air humidifying tank 2, the air heater 3, the air mass flow controller 4, the second pressure sensor 9 and the controller;
the air humidification tank 2 and the air heater 3 are disposed upstream of the air mass flow controller 4;
the second pressure sensor 9 is arranged at the downstream of the air mass flow controller 4, and the downstream of the second pressure sensor 9 is used for connecting a pile tested piece 5;
the controller is able to modify the operating strategy of the air mass flow controller 4 based on the measurement of the second pressure sensor 9.
It should be noted that, the second pressure sensor 9 is connected downstream of the air mass flow controller 4 and upstream of the stack tested piece 5, so that the second pressure sensor 9 can measure the air pressure in the pipe between the air mass flow controller 4 and the stack tested piece 5, that is, the measurement result of the second pressure sensor 9, and the controller can correct the operation strategy of the air mass flow controller 4 by acquiring the measurement result of the second pressure sensor 9 and according to the measurement result of the second pressure sensor 9.
It should be further noted that the air mass flow controller 4 is a valve with a function of controlling air flow, and may be specifically an electromagnetic valve, and when the air pressure is too high or too low in the detection result of the second pressure sensor 9, the controller may modify the operation strategy of the air mass flow controller 4, so that the opening and closing degree of the valve of the air mass flow controller 4 is changed, and finally the air pressure entering the cell stack test piece 5 meets the target pressure.
Through the technical scheme disclosed by the embodiment, the air humidifying tank and the air heater are arranged at the upstream of the air mass flow controller; a second pressure sensor is arranged at the downstream of the air mass flow controller, and the downstream of the second pressure sensor is used for connecting a tested piece of the pile; the controller is capable of modifying the operating strategy of the air mass flow controller based on the measurement from the second pressure sensor. The air pressure entering the tested piece of the galvanic pile is detected by the second pressure sensor through closed-loop control, and the controller corrects the working strategy of the air mass flow controller according to the detection result of the second pressure sensor, namely the detection pressure, so that the air pressure entering the tested piece of the galvanic pile meets the target pressure, and the aim of quickly and accurately controlling the air inlet pressure is fulfilled.
Further, the system for dynamically adjusting the air intake state of the fuel cell stack further comprises: a first pressure sensor 7;
the first pressure sensor 7 is disposed downstream of the air humidification tank 2 and the air heater 3, upstream of the air mass flow controller 4;
the controller is able to modify the operating strategy of the air humidification tank 2 and the air heater 3 based on the measurement of the first pressure sensor 7.
It should be noted that the first pressure sensor 7 is provided downstream of the air humidification tank 2 and the air heater 3 and upstream of the air mass flow controller 4, so that the air pressure entering the air mass flow controller 4 can be detected by the first pressure sensor 7, and the controller can correct the operation strategy of the air humidification tank 2 and the air heater 3 based on the air pressure measured by the first pressure sensor 7, that is, the measurement result. When the air pressure detected by the first pressure sensor 7 is too large or too small, the air pressure entering the air mass flow controller 4 can be made to meet the target pressure by correcting the operation strategy of the air humidification tank 2 and the air heater 3.
It should be further noted that the air pressure is related to the air temperature and humidity, and according to the gas state equation, when the amount of gas is constant, the current air pressure can be increased or decreased by changing the air temperature, and the current air pressure can also be changed by changing the air humidity, so that, in the present application, when the measurement result of the first pressure sensor, i.e. the pressure is too large or too small, the air pressure entering the air mass flow controller 4 can be changed by modifying the operating strategies of the air humidification tank 2 and the air heater 3, so that the air pressure entering the air mass flow controller 4 can meet the target pressure.
Further, the system for dynamically adjusting the air intake state of the fuel cell stack further comprises: a first temperature sensor 8;
the first temperature sensor 8 is disposed downstream of the air humidification tank 2 and the air heater 3, upstream of the air mass flow controller 4;
the controller is able to modify the operating strategy of the air humidification tank 2 and the air heater 3 based on the measurement of the first temperature sensor 8.
It should be noted that the first temperature sensor 8 is disposed downstream of the air humidification tank 2 and the air heater 3, upstream of the air mass flow controller 4, the first temperature sensor 8 can measure the temperature of the air entering the air mass flow controller 4, that is, the measurement result, and the controller corrects the operation strategy of the air humidification tank 2 and the air heater 3 according to the measurement result of the first temperature sensor 8.
It is also to be noted that when the measurement result of the first temperature sensor 8, i.e., the temperature value, is greater than or less than the target temperature value, the air temperature may be changed by changing the operation strategy of the air heater 3, i.e., the air temperature is changed by changing the heating power of the air heater 3, and the air temperature may be changed by changing the operation strategy of the air humidification tank 2, i.e., the humidification amount of the air humidification tank 2, according to the gas state equation.
Further, the controller is capable of correcting the operation strategies of the air humidification tank 2 and the air heater 3 according to the corrected operation strategy of the air mass flow controller 4.
It should be noted that, according to the gas state equation, after the controller corrects the air mass flow controller 4, the air pressure changes, which results in the change of the air temperature and humidity, so the controller needs to correct the operating strategies of the air humidification tank 2 and the air heater 3 according to the corrected operating strategy of the air mass flow controller 4, so as to ensure that the air pressure, the temperature and the humidity entering the tested piece 5 of the stack all meet the target values.
Further, the system for dynamically adjusting the air intake state of the fuel cell stack further comprises: a second temperature sensor 10;
the second temperature sensor 10 is arranged at the downstream of the air mass flow controller 4, and the downstream of the second temperature sensor 10 is used for connecting the electric pile tested piece 5;
the controller is capable of correcting the operating strategy of the air humidification tank 2, the air heater 3 and the air mass flow controller 4 based on the measurement result of the second temperature sensor 10.
It should be noted that a second temperature sensor 10 is disposed downstream of the air mass flow controller 4, the downstream of the second temperature sensor 10 is used for connecting the stack test piece 5, the second temperature sensor 10 can measure the temperature of the air entering the stack test piece 5, and the controller can correct the operating strategies of the air humidification tank 2, the air heater 3 and the air mass flow controller 4 according to the measurement result of the second temperature sensor 10, namely the air temperature, so that the temperature of the air entering the stack test piece 5 meets the target temperature.
It should be further noted that, according to the gas state equation, the temperature of the air is related to the humidity and the pressure when the amount of the air is constant, and therefore, the controller can change the temperature of the air entering the stack dut 5 by modifying the operation strategy of the air heater 3, and can change the temperature of the air entering the stack dut 5 by modifying the operation strategies of the air humidification tank 2 and the air mass flow controller 4.
Further, the system for dynamically adjusting the air intake state of the fuel cell stack further comprises: a dew point sensor 11;
the dew point sensor 11 is arranged at the downstream of the air mass flow controller 4, and the downstream of the dew point sensor 11 is used for connecting with the tested piece 5 of the pile;
the controller is able to modify the control strategy of the air humidification tank 2, the air heater 3 and the air mass flow controller 4 based on the dew point sensor measurements.
The dew point sensor is a sensor for detecting a dew point temperature, and the dew point is a temperature at which the air is cooled to saturation, namely, a temperature at which the water vapor and the water reach an equilibrium state, when the air pressure is kept constant while the moisture content in the air is constant.
It should also be noted that the dew point sensor 11 is disposed downstream of the air mass flow controller 4, the dew point sensor 11 is connected with the galvanic pile tested piece 5 at the downstream, the dew point sensor 11 can detect the dew point temperature entering the galvanic pile tested piece 5, thereby judging whether the air entering the tested piece 5 of the galvanic pile is lower than the dew point temperature or not, if the temperature detected by the dew point sensor 11 is lower than the dew point temperature, indicating that condensation has occurred in the air, and if the temperature detected by the dew point sensor 11 is not lower than the dew point temperature, it means that the dew condensation state does not occur in the air, and therefore, based on the gas state equation, the controller can correct the control strategies of the air humidification tank 2, the air heater 3 and the air mass flow controller 4 through the measurement result of the dew point sensor 11 to control the temperature of the air entering the cell tested piece.
Further, the controller can make the heating target temperature of the air heater 3 not lower than the measurement result of the dew point sensor.
It should be noted that, because heat loss occurs in the process of flowing air from the air heater 3 to the cell stack tested piece 5, according to the gas equation of state, the temperature is reduced when the amount of air is constant, and the pressure and humidity of the air are affected, a controller is required to control the heating target temperature of the air heater 3 not to be lower than the measurement result of the dew point sensor.
Further, the controller can set the operating strategy of the air mass flow controller 4 according to the operating strategy of the evacuation back-pressure valve 6.
It should be noted that the pressure responsiveness of the air entering the cavity of the pile tested piece 5 can be further increased by the combined action of the evacuation backpressure valve 6 and the air mass flow controller 4 during the operation process.
In order to facilitate understanding of the implementation process of each component in the above-mentioned scheme, the structural design of the system is shown in fig. 1, and the control logic is shown in fig. 2.
A dynamic adjusting system for the air inlet state of a fuel cell stack adopts a mass flow controller close to a stack cavity to dynamically control the air inlet state of the stack cavity, and comprises an air inlet electromagnetic valve 1, an air humidifying tank 2, an air heater 3, an air mass flow controller 4, a stack tested piece 5, an emptying back pressure valve 6, a first pressure sensor 7, a first temperature sensor 8, a second pressure sensor 9, a second temperature sensor 10 and a stack entering dew point sensor 11.
In the operation process of the system, compressed air enters an air supply module through an air inlet electromagnetic valve 1, passes through an air humidifying tank 2, an air heater 3 and an air mass flow controller 4 in sequence, and finally enters a cavity of a tested piece 5 of the galvanic pile; the air exhausted from the pile tested piece 5 leaves the air supply module through the evacuation back pressure valve 6.
Preferably, the air state before the air mass flow controller 4 can be detected by a pressure sensor before the mass flow controller 7 and a first temperature sensor 8; then, the air state after the air mass flow controller 4 is detected by a second pressure sensor 9, a second temperature sensor 10, and a pile-in dew point sensor 11.
A fuel cell stack air inlet state dynamic regulation system comprises an air humidification tank 2 control strategy, an air heater 3 control strategy and an air mass flow controller 4 control strategy. When the dynamic working condition is determined, the data of the air inlet pressure, flow, temperature and humidity parameters of the air changing along with the time can be determined. The air flow entering the cavity of the pile is controlled by the air mass flow controller 4, and closed-loop control is carried out by the measured value of the second pressure sensor 9; the air after the air mass flow controller 4 is humidified and temperature-controlled by the air humidifying tank 2 and the air heater 3 in combination with a gas state equation, and meanwhile, the closed loop is performed by the measurement values of the second temperature sensor 10 and the reactor-entering dew point sensor 11.
Preferably, the working strategies of the air humidification tank 2 and the air heater 3 are corrected by confirming the gas state before and after the air mass flow controller 4 in real time through the readings of the first pressure sensor 7, the first temperature sensor 8, the second pressure sensor 9, the second temperature sensor 10 and the reactor dew point sensor 11, and further determining the temperature and humidity changes before and after the air mass flow controller 4 through a gas state equation.
Preferably, dew condensation due to temperature drop before the air mass flow controller 4 can be avoided as much as possible by limiting the control target of the stack dew point.
Preferably, the pressure responsiveness of the air entering the cavity of the pile tested piece 5 can be further increased by the combined action of the evacuation backpressure valve 6 and the air mass flow controller 4 during operation.
In the invention, firstly, according to the actual operation condition requirement and the air inlet pipeline cavity optimized according to the specification of the tested piece of the galvanic pile, then the operation strategy of the evacuation back pressure valve and the operation strategy of the mass flow controller are determined in sequence, and the gas state entering the pile at the rear section of the mass flow controller is obtained through the pressure sensor,
preferably, according to actual operation condition requirements and an air inlet pipeline cavity optimized according to the specification of a tested piece of the galvanic pile, determining an operation strategy of an evacuation back pressure valve and an initial operation strategy of an air heater and an air humidification tank;
after the working strategy of the evacuation back pressure valve is determined, the working strategy of the flow controller is set, the back-segment reactor gas state of the mass flow controller is obtained through the pressure sensor, and the working strategy of the mass flow controller is corrected according to the back-segment reactor gas state of the mass flow controller, so that the mass flow working strategy is changed;
and finally, according to the mass flow controller rear section stacking gas strategy obtained by the air heater and air humidification tank working strategy, the working states of the air heater and the air humidification tank are corrected in a feedback mode, and the working strategy of the current air heater and the air humidification tank is obtained.
The invention has the advantages that:
1. the fast dynamic control of the air inlet state of the cavity of the pile can be realized;
2. the accurate closed-loop control of the air inlet state of the cavity of the pile can be realized;
3. the system has a relatively simple structure, and can be suitable for various galvanic piles with different specifications by optimizing the type selection of key devices and pipe diameters;
4. the whole vehicle working strategy can be simulated, the whole vehicle working logic can be perfectly reproduced, and even the calibration strategy of the whole vehicle can be directly used under certain special conditions;
5. the applicability is strong, and the rack recurrence under various different vehicle working conditions can be supported;
6. simple and easy to understand, convenient to operate, easily realize.
Corresponding to the system for dynamically adjusting the air intake state of the fuel cell stack disclosed in the above embodiments, the present application also discloses a method for dynamically adjusting the air intake state of the fuel cell stack, as shown in fig. 3, which is a schematic structural diagram of the method for dynamically adjusting the air intake state of the fuel cell stack, and is suitable for a system for dynamically adjusting the air intake state of the fuel cell stack, and the method includes:
step S301: obtaining the measurement results of a second pressure sensor 9, a second temperature sensor 10 and a dew point sensor 11;
step S302: the operating strategy of the air humidification tank 2, the air heater 3 and the air mass flow controller 4 is modified based on the measurement results of the second pressure sensor 9, the second temperature sensor 10 and the dew point sensor 11.
According to the embodiment of the application, the measurement results of the second pressure sensor, the second temperature sensor and the dew point sensor are obtained; and correcting the operating strategy of the air humidification tank, the air heater and the air mass flow controller based on the measurements of the second pressure sensor, the second temperature sensor and the dew point sensor. According to the dynamic adjustment method for the air inlet state of the fuel cell stack, the air pressure entering the tested piece of the stack is detected by the second pressure sensor, the second temperature sensor and the dew point sensor through closed-loop control, and the working strategy of the air mass flow controller is corrected by the controller according to the gas state equation and the detection results of the second pressure sensor, the second temperature sensor and the dew point sensor, so that the air pressure, the temperature and the humidity entering the tested piece of the stack meet target values, and the purpose of quickly and accurately controlling the air inlet pressure, the temperature and the humidity is achieved.
Further, the method for dynamically adjusting the air intake state of the fuel cell stack, as shown in fig. 4, further includes:
step S401: acquiring measurement results of the first pressure sensor 7 and the first temperature sensor 8;
step S402: the operating strategies of the air heater and the air humidification tank 2 and the air heater 3 are corrected based on the corrected operating strategies of the air mass flow controller 4 and the measurement results of the first pressure sensor 7 and the first temperature sensor 8.
The process is further illustrated below with reference to specific examples:
after the dynamic working condition requirement of the fuel cell is determined, the model selection specification of the hardware of the test system is optimized according to the dynamic working condition characteristics and the specification of the tested piece, the model selection specification comprises the setting of proper volume of the containing cavity, reasonable humidification range, heating range and the like, and the initial control strategy of the air humidification tank 2, the air heater 3, the air quality flow controller 4 and the evacuation back pressure valve 6 is obtained at the same time.
At this time, it is necessary to calculate the actual operation strategy of the air humidification tank 2 and the air heater 3 based on the gas expansion state before and after the air mass flow controller 4 and the temperature and humidity target values of the stack-entering air, and to correct the air humidification tank 2, the air heater, and the air mass flow controller 4 based on the readings of the second pressure sensor 9, the second temperature sensor 10, and the stack-entering dew point sensor 11. At this time, since the working state of the air mass flow controller 4 is corrected, the gas expansion state is influenced, and the working strategies of the air humidification tank 2 and the air heater 2 are influenced again, and finally, a dynamic closed-loop control is realized.
In summary, the invention discloses a dynamic adjusting system and a control method for the air intake state of a fuel cell stack, which can meet the dynamic condition requirement of the air intake state of the fuel cell stack, and quickly and accurately control the pressure, flow, temperature and humidity of the air intake of the stack.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the system or system embodiments are substantially similar to the method embodiments and therefore are described in a relatively simple manner, and reference may be made to some of the descriptions of the method embodiments for related points. The above-described system and system embodiments are only illustrative, wherein the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A fuel cell stack air intake state dynamic adjustment system, comprising: the air humidifying device comprises an air humidifying tank (2), an air heater (3), an air mass flow controller (4), a second pressure sensor (9) and a controller;
the air humidification tank (2) and the air heater (3) are arranged upstream of the air mass flow controller (4);
the second pressure sensor (9) is arranged at the downstream of the air mass flow controller (4), and the downstream of the second pressure sensor (9) is used for connecting a tested piece (5) of the pile;
the controller is able to modify the operating strategy of the air mass flow controller (4) according to the measurement result of the second pressure sensor (9).
2. The system for dynamically adjusting the air intake state of a fuel cell stack according to claim 1, further comprising: a first pressure sensor (7);
the first pressure sensor (7) is arranged downstream of the air humidification tank (2) and the air heater (3), upstream of the air mass flow controller (4);
the controller is capable of modifying the operating strategy of the air humidification tank (2) and the air heater (3) according to the measurement of the first pressure sensor (7).
3. The system for dynamically adjusting the air intake state of a fuel cell stack according to claim 1, further comprising: a first temperature sensor (8);
the first temperature sensor (8) is arranged downstream of the air humidification tank (2) and the air heater (3), upstream of the air mass flow controller (4);
the controller is capable of correcting the operating strategy of the air humidification tank (2) and the air heater (3) according to the measurement result of the first temperature sensor (8).
4. A fuel cell stack air inlet condition dynamic regulation system according to claim 1, characterized in that the controller is capable of modifying the operating strategy of the air humidification tank (2) and the air heater (3) according to the modified operating strategy of the air mass flow controller (4).
5. The system for dynamically adjusting the air intake state of a fuel cell stack according to claim 1, further comprising: a second temperature sensor (10);
the second temperature sensor (10) is arranged at the downstream of the air mass flow controller (4), and the downstream of the second temperature sensor (10) is used for connecting the electric pile tested piece (5);
the controller is capable of correcting the operating strategy of the air humidification tank (2), the air heater (3) and the air mass flow controller (4) in dependence on the measurement of the second temperature sensor (10).
6. The system for dynamically adjusting the air intake state of a fuel cell stack according to claim 1, further comprising: a dew point sensor (11);
the dew point sensor (11) is arranged at the downstream of the air mass flow controller (4), and the downstream of the dew point sensor (11) is used for being connected with the tested piece (5) of the galvanic pile;
the controller is capable of modifying the control strategy of the air humidification tank (2), the air heater (3) and the air mass flow controller (4) in dependence on the measurement of the dew point sensor.
7. The fuel cell stack air intake state dynamic adjustment system according to claim 6, characterized in that the controller is capable of making the heating target temperature of the air heater (3) not lower than the measurement result of the dew point sensor (11).
8. The system for dynamic regulation of air intake state of a fuel cell stack according to claim 1, characterized in that the controller is able to set the operating strategy of the air mass flow controller (4) according to the operating strategy of an evacuation back-pressure valve (6).
9. A fuel cell stack air intake state dynamic adjustment method, characterized in that the fuel cell stack air intake state dynamic adjustment system according to any one of claims 1 to 8 is adopted, and the method comprises the following steps:
obtaining measurement results of a second pressure sensor (9), a second temperature sensor (10) and a dew point sensor (11);
-correcting the operating strategy of the air humidification tank (2), the air heater (3) and the air mass flow controller (4) based on the measurements of the second pressure sensor (9), the second temperature sensor (10) and the dew point sensor (11).
10. The method for dynamically adjusting the air intake state of a fuel cell stack as recited in claim 9, further comprising:
obtaining measurement results of a first pressure sensor (7) and a first temperature sensor (8);
-modifying the operating strategy of the air heater and the air humidification tank (2) and the air heater (3) based on the modified operating strategy of the air mass flow controller (4) and the measurements of the first pressure sensor (7) and the first temperature sensor (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010724020.9A CN111864228A (en) | 2020-07-24 | 2020-07-24 | System and method for dynamically adjusting air intake state of fuel cell stack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010724020.9A CN111864228A (en) | 2020-07-24 | 2020-07-24 | System and method for dynamically adjusting air intake state of fuel cell stack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111864228A true CN111864228A (en) | 2020-10-30 |
Family
ID=72950105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010724020.9A Pending CN111864228A (en) | 2020-07-24 | 2020-07-24 | System and method for dynamically adjusting air intake state of fuel cell stack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111864228A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112304532A (en) * | 2020-11-27 | 2021-02-02 | 上海捷氢科技有限公司 | Fuel cell air tightness detection device and detection method |
| CN115050998A (en) * | 2022-05-26 | 2022-09-13 | 内蒙古一派氢能科技有限公司 | Hydrogen fuel cell stack activation system and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993161A (en) * | 2015-06-30 | 2015-10-21 | 同济大学 | Air supply system experiment device for proton exchange membrane fuel cell for automobile |
| CN109037736A (en) * | 2018-09-19 | 2018-12-18 | 北京久安通氢能科技有限公司 | The humidification controling adjustment device and humidifying controlling method of fuel cell |
-
2020
- 2020-07-24 CN CN202010724020.9A patent/CN111864228A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993161A (en) * | 2015-06-30 | 2015-10-21 | 同济大学 | Air supply system experiment device for proton exchange membrane fuel cell for automobile |
| CN109037736A (en) * | 2018-09-19 | 2018-12-18 | 北京久安通氢能科技有限公司 | The humidification controling adjustment device and humidifying controlling method of fuel cell |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112304532A (en) * | 2020-11-27 | 2021-02-02 | 上海捷氢科技有限公司 | Fuel cell air tightness detection device and detection method |
| CN115050998A (en) * | 2022-05-26 | 2022-09-13 | 内蒙古一派氢能科技有限公司 | Hydrogen fuel cell stack activation system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111725546B (en) | Test system and test method for fuel cell stack working condition | |
| US8126666B2 (en) | Fuel cell evaluation method and fuel cell evaluation apparatus | |
| CN101375455B (en) | Fuel cell system and method for estimating output characteristic of fuel cell | |
| EP2406622B1 (en) | Oxygen sensor controller and oxygen sensor control method | |
| US20190245223A1 (en) | Controlled gas conditioning for a reaction gas of a fuel cell | |
| US8470479B2 (en) | Sensorless relative humidity control in a fuel cell application | |
| CN114824373B (en) | Simulation test combined fuel cell performance optimization method, device and equipment | |
| EP2215678A1 (en) | Flow control assembly for use with fuel cell systems operating on fuels with varying fuel composition | |
| Grasser et al. | A fully analytical PEM fuel cell system model for control applications | |
| CN111916791B (en) | Multi-working-condition multi-sample fuel cell stack testing system and control method thereof | |
| CN111864228A (en) | System and method for dynamically adjusting air intake state of fuel cell stack | |
| CN215578649U (en) | Fuel cell water balance test system | |
| CN115763900A (en) | Method and system for predicting humidification capacity of humidifier for fuel cell | |
| CN111722121A (en) | Anti-condensation air inlet pipeline of fuel cell stack test board and control method | |
| CN114171760A (en) | Fuel Cell Test Method Combined with Simulation Model | |
| CN111916792B (en) | Single-working-condition multi-sample fuel cell stack testing system and control method thereof | |
| CN103926535A (en) | Transient Inlet Relative Humidity Estimation Via Adaptive Cathode Humidification Unit Model And High Frequency Resistance | |
| Himanen et al. | Characterization of membrane electrode assembly with hydrogen–hydrogen cell and ac-impedance spectroscopy: Part I. Experimental | |
| CN113074975A (en) | Fuel cell humidifier testing device | |
| CN113921871A (en) | Humidity detection system and method for high-power fuel cell stack reaction gas | |
| CN112290061A (en) | Fuel cell simulation apparatus, method and storage medium | |
| JP2004353915A (en) | Humidifier | |
| JP2009193722A (en) | Fuel cell evaluation system | |
| JP2020510293A (en) | Method for detecting leaks in an energy converter system | |
| JP7372242B2 (en) | Control of the control variables of the reactant reformer of the fuel cell by calculating the actual values of the control variables |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 201800 No. 1788, xiechun Road, Anting Town, Jiading District, Shanghai Applicant after: Shanghai jiehydrogen Technology Co.,Ltd. Address before: 1728 xiechun Road, Anting Town, Jiading District, Shanghai, 201804 Applicant before: Shanghai Jet Hydrogen Technology Co.,Ltd. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201030 |