CN112701332A - Software control method for maintaining pressure difference between cathode and anode of fuel cell of hydrogen energy automobile - Google Patents
Software control method for maintaining pressure difference between cathode and anode of fuel cell of hydrogen energy automobile Download PDFInfo
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- CN112701332A CN112701332A CN202011580483.9A CN202011580483A CN112701332A CN 112701332 A CN112701332 A CN 112701332A CN 202011580483 A CN202011580483 A CN 202011580483A CN 112701332 A CN112701332 A CN 112701332A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—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
- H01M8/04537—Electric variables
- H01M8/04604—Power, energy, capacity or load
- H01M8/04619—Power, energy, capacity or load of fuel cell stacks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—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
- H01M8/04388—Pressure; Ambient pressure; Flow of anode reactants at the inlet or inside the fuel cell
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—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
- H01M8/04395—Pressure; Ambient pressure; Flow of cathode reactants at the inlet or inside the fuel cell
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—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
- H01M8/04537—Electric variables
- H01M8/04574—Current
- H01M8/04589—Current of fuel cell stacks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—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
- H01M8/04537—Electric variables
- H01M8/04604—Power, energy, capacity or load
- H01M8/04626—Power, energy, capacity or load of auxiliary devices, e.g. batteries, capacitors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04746—Pressure; Flow
- H01M8/04753—Pressure; Flow of fuel cell reactants
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04746—Pressure; Flow
- H01M8/04761—Pressure; Flow of fuel cell exhausts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04746—Pressure; Flow
- H01M8/04783—Pressure differences, e.g. between anode and cathode
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Sustainable Development (AREA)
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a software control method for maintaining the pressure difference between the cathode and the anode of a fuel cell by a hydrogen energy automobile, which is provided with two PID control modules, wherein one PID control module is used for controlling the output power of an electric pile, the other PID control module is used for ensuring the pressure at two sides of the cathode and the anode, the output end of the other PID control module controls a loading current, the output end of the loading current controls the required flow, the output end of the required flow controls the rotating speed of an air compressor, the output end of the rotating speed of the air compressor controls the air admission pressure of an air system, and the output end of the air admission pressure of the air system is connected with the electric pile of the fuel cell and a measuring element. The software control method for maintaining the pressure difference between the cathode and the anode of the fuel cell of the hydrogen energy automobile provides a software implementation method which can replace manual setting and control the pressure at two sides of the cathode and the anode of the fuel cell, realizes the same function and can improve the response speed of the system.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a software control method for maintaining the pressure difference between the cathode and the anode of a fuel cell of a hydrogen energy automobile.
Background
Fuel cells will become a future energy source. Interest in fuel cells has increased over the last decade due to the many negative consequences of using fossil fuels to generate electricity. Some of these include severe pollution, widespread exploitation of world resources, and political control and governance of countries that possess widespread resources. There is a need for a new energy source that has the advantages of high energy efficiency, low pollutant emissions, unlimited fuel supply, etc. Fuel cells are now more nearly commercialized than ever before, and they have the ability to fully achieve this goal. Although fuel cells have the advantages of high efficiency, high power density and the like, the single fuel cell cannot be used in an actual system, and due to some characteristics of the fuel cell, auxiliary equipment adapted to the fuel cell must be configured to provide the fuel cell with necessary control measures such as fuel, oxidant, cooling circulation device and the like to ensure that the fuel cell outputs power stably and continuously. The performance and durability of a fuel cell power generation system are closely related to system components, a system control method and a system control strategy besides the galvanic pile. Therefore, the reasonable control method and the strategy of the vehicle fuel cell are provided, the influence of adverse operating conditions is avoided, and the performance and the service life of a fuel cell system are improved.
With the increasing requirements on the dynamic performance of the PEMFC, the requirements on the gas pressure control on the two sides of the proton exchange membrane are increased while the dynamic performance of the PEMFC is improved.
At present, most of power type PEMFC (proton exchange membrane fuel cell) galvanic pile require the pressure of the anode and cathode gas inlets of the galvanic pile to be kept balanced, or the pressure of the anode hydrogen inlet is slightly higher than the pressure value of the cathode air inlet, when the galvanic pile runs, a slightly larger pressure difference between the anode hydrogen and the cathode air inlet is kept, which is beneficial to reducing the nitrogen crossing rate in the galvanic pile and preventing the imbalance of the hydrogen concentration, therefore, a software control method for maintaining the pressure difference between the cathode and the anode of a fuel cell by a hydrogen energy automobile is provided.
Disclosure of Invention
The invention aims to provide a software control method for maintaining the pressure difference between the cathode and the anode of a fuel cell of a hydrogen energy automobile, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a software control method for maintaining the pressure difference between the cathode and the anode of a fuel cell of a hydrogen energy automobile is provided with two PID control modules, one PID control module is used for controlling the output power of the electric pile, the other PID control module is used for ensuring the pressure on the two sides of the cathode and the anode, wherein the output end of the other PID control module controls loading current, the output end of the loading current controls required flow, the output end of the required flow rate controls the rotating speed of the air compressor, the output end of the rotating speed of the air compressor controls the air inlet pressure of the air system, the output end of the air inlet pressure of the air system is connected with the fuel cell stack and the measuring element, the output end of one PID control module controls a hydrogen system, the output end of the hydrogen system controls hydrogen inlet pressure, and the output end of the hydrogen inlet pressure is connected with a fuel cell stack and a measuring element;
the software control method comprises the following steps: the input power of the galvanic pile is compared with the actual power and then regulated by PID, the power lookup table determines the current, the air flow, the air pressure rotating speed and the air pressure, and then the pressure difference between the air side pressure and the hydrogen side pressure is compared, and then is repaired by a feedback coefficient and is used as the pressure of hydrogen entering the galvanic pile after PID regulation.
Preferably, the measuring element is a pressure sensor.
Preferably, the control method compares the pressure difference between the air side and the hydrogen side, compares the pressure difference between the cathode and the anode, and adds 0.02Mpa after correction.
Compared with the prior art, the invention has the beneficial effects that: the software control method for maintaining the pressure difference between the cathode and the anode of the fuel cell by the hydrogen energy automobile provides a software implementation method which can replace manual setting and control the pressure at the two sides of the cathode and the anode of the fuel cell, realizes the same function, can improve the response speed of the system, is more favorable for the stable operation of the whole system, realizes the stability of point pair output power and the pressure difference at the two sides of the cathode and the anode by two PID controls, ensures the balance of the concentration of hydrogen and oxygen at the two sides of the cathode and the anode of the system, maintains the reaction requirement inside a fuel cell stack, firstly controls the power by the PID stably, thereby indirectly controlling the pressure of an air system, and then controls the stack entering pressure of a hydrogen loop by the pressure difference between the cathode and the anode.
Drawings
FIG. 1 is a schematic diagram of the system of a software control method for maintaining the pressure difference between the cathode and the anode of a fuel cell in a hydrogen vehicle according to the present invention;
fig. 2 is a schematic diagram of a software implementation flow structure of a software control method for maintaining the cathode-anode pressure difference of a fuel cell of a hydrogen vehicle according to the present invention.
Detailed Description
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.
Referring to fig. 1-2, the present invention provides a technical solution: a software control method for maintaining the pressure difference between the cathode and the anode of a fuel cell of a hydrogen energy automobile is provided with two PID control modules, wherein one PID control module is used for controlling the output power of an electric pile, the other PID control module is used for ensuring the pressure at the two sides of the cathode and the anode, the output end of the other PID control module controls a loading current, the output end of the loading current controls the required flow, the output end of the required flow controls the rotating speed of an air compressor, the output end of the rotating speed of the air compressor controls the air inlet pressure of an air system, the output end of the air inlet pressure of the air system is connected with the electric pile of the fuel cell and a measuring element, the output end of one PID control module controls a hydrogen system, the output end of the hydrogen system controls the hydrogen inlet pressure, the output end of the hydrogen inlet pressure is connected with the electric pile of the fuel cell and the measuring element, comparing the pressure difference between the two sides of the cathode and the anode, and adding 0.02Mpa after correction;
after the actual output power of the electric pile is compared with the set power through feedback and the difference value is regulated through PID, the electric pile current, the air flow, the rotating speed of an air compressor, the air pressure and the like are determined through table lookup and then are used as the input of an air intake system, the partial pressure of a cathode side air system is regulated, and further the output power of the electric pile is kept unchanged; for the regulation of the pressure at the two sides, the pressure difference at the two sides of the cathode and the anode is compared, and 0.02Mpa is added after correction to be used as the input of the PID control of the hydrogen pressure, so that the control of the pressure at the hydrogen side meets the requirement of the system, and the pressure value at the two sides of the cathode and the anode meets the requirement of the system;
the software control method comprises the following steps: the input power of the galvanic pile is compared with the actual power and then regulated by PID, the power lookup table determines the current, the air flow, the air pressure rotating speed and the air pressure, and then the pressure difference between the air side pressure and the hydrogen side pressure is compared, and then is repaired by a feedback coefficient and is used as the pressure of hydrogen entering the galvanic pile after PID regulation.
In conclusion, the software control method for maintaining the pressure difference between the cathode and the anode of the fuel cell of the hydrogen energy automobile realizes the stability of point pair output power and the pressure difference between the two sides of the cathode and the anode through two PID controls, ensures the balance of the concentrations of hydrogen and oxygen at the two sides of the cathode and the anode of the system, maintains the reaction requirement inside the fuel cell stack, stably controls the power through the PID first, thereby indirectly controlling the pressure of an air system, and then controls the stack entering pressure of a hydrogen loop through the pressure difference between the anode and the cathode.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A software control method for maintaining the pressure difference between the cathode and the anode of a fuel cell of a hydrogen energy automobile is characterized by comprising the following steps: the system is provided with two PID control modules, wherein one PID control module is used for controlling the output power of the galvanic pile, the other PID control module is used for ensuring the pressure at two sides of a cathode and an anode, the output end of the other PID control module controls loading current, the output end of the loading current controls required flow, the output end of the required flow controls the rotating speed of an air compressor, the output end of the rotating speed of the air compressor controls the air inlet pressure of an air system, the output end of the air inlet pressure of the air system is connected with the galvanic pile of the fuel cell and a measuring element, the output end of one PID control module controls a hydrogen system, the output end of the hydrogen system controls the hydrogen inlet pressure, and the output end of the hydrogen inlet pressure is connected with the galvanic pile of the fuel cell and the measuring;
the software control method comprises the following steps: comparing the input power of the galvanic pile with the actual power, then regulating through PID, determining the current, the air flow, the air pressure rotating speed and the air pressure through a power look-up table, further comparing the pressure difference between the air side pressure and the hydrogen side pressure, then repairing through a feedback coefficient, and using the pressure as the pressure of hydrogen entering the galvanic pile after PID regulation.
2. The software control method for maintaining the pressure difference between the cathode and the anode of the fuel cell in the hydrogen powered automobile as claimed in claim 1, wherein: the measuring element adopts a pressure sensor.
3. The software control method for maintaining the pressure difference between the cathode and the anode of the fuel cell in the hydrogen powered automobile as claimed in claim 1, wherein: the control method compares the pressure difference between the air side pressure and the hydrogen side pressure, compares the pressure difference between the cathode side and the anode side, and adds 0.02Mpa after correction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011580483.9A CN112701332A (en) | 2020-12-28 | 2020-12-28 | Software control method for maintaining pressure difference between cathode and anode of fuel cell of hydrogen energy automobile |
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| CN202011580483.9A CN112701332A (en) | 2020-12-28 | 2020-12-28 | Software control method for maintaining pressure difference between cathode and anode of fuel cell of hydrogen energy automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113571744A (en) * | 2021-07-15 | 2021-10-29 | 金华氢途科技有限公司 | Gas pressure control method for fuel cell system |
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| JP2002373682A (en) * | 2001-06-15 | 2002-12-26 | Honda Motor Co Ltd | Fuel cell system |
| CN1632978A (en) * | 2004-12-29 | 2005-06-29 | 武汉理工大学 | Vehicular fuel battery engine control method and apparatus |
| CN102324536A (en) * | 2011-07-26 | 2012-01-18 | 浙江吉利汽车研究院有限公司 | Vehicle proton exchange membrane fuel cell (PEMFC) pressure control system |
| CN203326040U (en) * | 2013-06-24 | 2013-12-04 | 大连民族学院 | Output voltage and gas supply control system of proton exchange membrane fuel cell |
| CN108550880A (en) * | 2018-05-31 | 2018-09-18 | 安徽江淮汽车集团股份有限公司 | Hydrogen cell automobile hydrogen control system |
| CN109980252A (en) * | 2019-03-25 | 2019-07-05 | 武汉海亿新能源科技有限公司 | A kind of fuel cell hydrogen and air supply control method, device and system |
| CN110414157A (en) * | 2019-07-31 | 2019-11-05 | 四川嘉垭汽车科技有限公司 | Proton exchange film fuel battery system multiple target sliding-mode control |
-
2020
- 2020-12-28 CN CN202011580483.9A patent/CN112701332A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002373682A (en) * | 2001-06-15 | 2002-12-26 | Honda Motor Co Ltd | Fuel cell system |
| CN1632978A (en) * | 2004-12-29 | 2005-06-29 | 武汉理工大学 | Vehicular fuel battery engine control method and apparatus |
| CN102324536A (en) * | 2011-07-26 | 2012-01-18 | 浙江吉利汽车研究院有限公司 | Vehicle proton exchange membrane fuel cell (PEMFC) pressure control system |
| CN203326040U (en) * | 2013-06-24 | 2013-12-04 | 大连民族学院 | Output voltage and gas supply control system of proton exchange membrane fuel cell |
| CN108550880A (en) * | 2018-05-31 | 2018-09-18 | 安徽江淮汽车集团股份有限公司 | Hydrogen cell automobile hydrogen control system |
| CN109980252A (en) * | 2019-03-25 | 2019-07-05 | 武汉海亿新能源科技有限公司 | A kind of fuel cell hydrogen and air supply control method, device and system |
| CN110414157A (en) * | 2019-07-31 | 2019-11-05 | 四川嘉垭汽车科技有限公司 | Proton exchange film fuel battery system multiple target sliding-mode control |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113571744A (en) * | 2021-07-15 | 2021-10-29 | 金华氢途科技有限公司 | Gas pressure control method for fuel cell system |
| CN113571744B (en) * | 2021-07-15 | 2022-05-24 | 金华氢途科技有限公司 | Gas pressure control method for fuel cell system |
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