CN109524688B - Hydrogen injection valve driving control system and method for proton exchange membrane fuel cell stack - Google Patents
Hydrogen injection valve driving control system and method for proton exchange membrane fuel cell stack Download PDFInfo
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- CN109524688B CN109524688B CN201811425510.8A CN201811425510A CN109524688B CN 109524688 B CN109524688 B CN 109524688B CN 201811425510 A CN201811425510 A CN 201811425510A CN 109524688 B CN109524688 B CN 109524688B
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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
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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
- H01M8/043—Processes for controlling fuel cells or fuel cell systems applied during specific periods
- H01M8/04302—Processes for controlling fuel cells or fuel cell systems applied during specific periods applied during start-up
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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
- H01M8/043—Processes for controlling fuel cells or fuel cell systems applied during specific periods
- H01M8/04303—Processes for controlling fuel cells or fuel cell systems applied during specific periods applied during shut-down
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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
Abstract
The invention discloses a hydrogen injection valve driving control system for a proton exchange membrane fuel cell stack, which comprises a sensor, a processor and an actuator which are sequentially in communication connection; and a driving method of a hydrogen injection valve for a proton exchange membrane fuel cell stack, comprising the steps of: s1, collecting parameter signals of the fuel cell stack by using a sensor; s2, inputting the acquired parameter signals into a hydrogen system control module, and outputting the hydrogen injection quantity and the tail gate valve opening state value; s3, inputting the opening state value of the tail valve into the injection period module, and outputting a hydrogen injection period value; s4, inputting the hydrogen injection quantity and the hydrogen injection period value into the injection pulse width module, and outputting a hydrogen injection pulse width value; s5, inputting the opening state value of the tail valve, the hydrogen injection period value and the hydrogen injection pulse width value into a driving module, and controlling an actuator according to the values; the invention solves the problems that the pressure fluctuation of a hydrogen gas supply system is large and the hydrogen gas supply system cannot work for a long time in the prior art.
Description
Technical Field
The invention belongs to the technical field of fuel cells, and particularly relates to a hydrogen injection valve driving control system and method for a proton exchange membrane fuel cell stack.
Background
Fuel cells are increasingly receiving attention from various automobile manufacturers as a clean and pollution-free power source. The proton exchange membrane fuel cell has the advantages of low working temperature, less matched equipment, quick start and stop and the like, so the proton exchange membrane fuel cell is widely applied to vehicle systems.
The cell stack of the proton exchange membrane fuel cell consists of a plurality of single cells, and the main components comprise an anode, a cathode, a proton exchange membrane and other systems. The hydrogen gas is oxidized at the anode, and the air is reduced at the cathode. In order to ensure the system to operate normally, the anode and the cathode need to maintain certain gas supply pressure, so that the anode and the cathode need a special gas supply system. The anode gas supply system mainly comprises a hydrogen cylinder and pressure reducing mechanisms at all levels, wherein the last level of the pressure reducing mechanism is usually a controllable pressure adjusting part which can adjust the gas supply pressure of the hydrogen in time according to the working condition. The injection valve has the advantages of quick response, high precision and the like, and is often used as a pressure regulating component of a hydrogen system.
The hydrogen gas supply system of the fuel cell anode is provided with a tail discharge valve at the tail end except for a pressure regulating valve, and the tail discharge valve is opened discontinuously for discharging water. When the hydrogen tail gas exhaust valve is opened or closed, the resistance of a flow passage of the hydrogen supply system is changed rapidly, and the pressure is correspondingly fluctuated violently. Therefore, in order to suppress pressure fluctuation caused by opening and closing of the tail valve and ensure stable pressure of the hydrogen gas supply system, the injection valve is required to respond to the control requirement of the controller at a higher injection frequency and quickly and accurately inject the required hydrogen gas. However, the number of times of operation of the injection valve is limited, and a high injection frequency also shortens the normal operation time of the injection valve, increases the probability of failure of the injection valve, and affects the life of the fuel cell stack. The injection frequency of the injection valve is reduced for prolonging the working time of the injection valve, so that the pressure fluctuation of a hydrogen gas supply system is often larger, and particularly, the pressure fluctuation is difficult to compensate in time by the injection quantity of the hydrogen gas during the action of the tail valve, so that severe pressure oscillation is caused.
In summary, it is difficult to achieve both high injection frequency and long operation time required for pressure control in the prior art.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a system and a method for driving and controlling a hydrogen injection valve for a proton exchange membrane fuel cell stack, which take high injection frequency and long working time required by pressure control into consideration, and is used for solving the problems that a hydrogen gas supply system in the prior art has large pressure fluctuation and cannot work for a long time.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that:
a hydrogen injection valve driving control system for a proton exchange membrane fuel cell stack comprises a sensor, a processor and an actuator which are sequentially in communication connection.
Further, the processor comprises a hydrogen system control module, an injection pulse width module, an injection period module and a driving module;
the input end of the hydrogen system control module is in communication connection with the sensor, and the output end of the hydrogen system control module is in communication connection with the injection period module and the injection pulse width module respectively;
the input end of the injection pulse width module is in communication connection with the injection period module;
the input end of the driving module is respectively in communication connection with the hydrogen system control module, the injection pulse width module and the injection period module, and the output end of the driving module is in communication connection with the actuator.
A proton exchange membrane fuel cell stack hydrogen injection valve driving method, proton exchange membrane fuel cell stack hydrogen injection valve driving control system includes sensor, processor and executor, the processor includes hydrogen system control module, injection pulse width module, injection period module and driving module; the driving method of hydrogen injection valve for proton exchange membrane fuel cell stack includes the following steps:
s1: collecting parameter signals of the fuel cell stack by using a sensor;
s2: inputting the parameter signals collected in the step S1 into a hydrogen system control module, and outputting the hydrogen injection quantity and the tail gate valve opening state value;
s3: inputting the opening state value of the tail exhaust valve into an injection period module, and outputting a hydrogen injection period value;
s4: inputting the hydrogen injection quantity and the hydrogen injection period value into an injection pulse width module, and outputting a hydrogen injection pulse width value;
s5: and inputting the opening state value of the tail exhaust valve, the hydrogen injection period value and the hydrogen injection pulse width value into the driving module, and controlling the actuator according to the values.
Further, in step S3, the injection period module is configured with an on timer, an off timer, a time limit, a first hydrogen injection period value, and a second hydrogen injection period value.
Further, the method for outputting the value of the hydrogen gas injection period comprises the following steps:
s3-1: when the tail exhaust valve is opened, using an opening timer to time and setting a closing timer to be 0;
s3-2: when the tail exhaust valve is closed, using a closing timer to time and setting an opening timer to be 0;
s3-3: and judging whether the requirements are met or not according to the count values of the start timer and the stop timer and a preset time limit value, if so, outputting a second hydrogen gas injection period value, and otherwise, outputting a first hydrogen gas injection period value.
Further, in step S3-3, the judgment formula is:
in the formula, Ton、ToffThe count values of the starting timer and the closing timer are respectively; t is a preset time limit value;
if any one of the above conditions is satisfied, the output meets the requirement.
The invention has the beneficial effects that:
the invention has proposed proton exchange membrane fuel cell pile uses the hydrogen injection valve to drive the control system and method, in the course that the pressure fluctuation of the hydrogen gas supply system is great, especially in the course that the tail valve opens and closes, adopt the higher injection frequency to control the hydrogen injection valve, have obtained the better pressure control effect; in the process that the pressure fluctuation of the hydrogen supply system is small, namely the hydrogen injection quantity is stable, the lower injection frequency is adopted to control the hydrogen injection valve, and the working time of the injection valve is prolonged.
Drawings
FIG. 1 is a block diagram of a hydrogen injection valve drive control system for a PEMFC stack;
FIG. 2 is a flow chart of a method for driving a hydrogen injection valve for a PEM fuel cell stack;
FIG. 3 is a flowchart of a method for outputting a hydrogen injection cycle value;
fig. 4 is a diagram of a practical application process of the driving method.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in fig. 1, a driving control system of a hydrogen injection valve for a proton exchange membrane fuel cell stack comprises a sensor, a processor and an actuator which are sequentially connected in a communication manner;
the processor comprises a hydrogen system control module, an injection pulse width module, an injection period module and a driving module;
the input end of the hydrogen system control module is in communication connection with the sensor, and the output end of the hydrogen system control module is in communication connection with the injection period module and the injection pulse width module respectively;
the input end of the injection pulse width module is in communication connection with the injection period module;
the input end of the driving module is respectively in communication connection with the hydrogen system control module, the injection pulse width module and the injection period module, and the output end of the driving module is in communication connection with the actuator.
A proton exchange membrane fuel cell stack hydrogen injection valve driving method, proton exchange membrane fuel cell stack hydrogen injection valve driving control system includes sensor, processor and executor, the processor includes hydrogen system control module, injection pulse width module, injection period module and driving module; a method for driving a hydrogen injection valve for a pem fuel cell stack, as shown in fig. 2, comprises the steps of:
s1: collecting parameter signals of the fuel cell stack by using a sensor;
the parameter signals are state values of the fuel cell stack, including the injection pressure of a hydrogen system, the inlet pressure of an air system, the inlet flow of the air system and the temperature of cooling water;
s2: inputting the parameter signals collected in the step S1 into a hydrogen system control module, and outputting the hydrogen injection quantity and the tail gate valve opening state value;
s3: inputting the opening state value of the tail exhaust valve into an injection period module, and outputting a hydrogen injection period value;
the injection period module is provided with a starting timer, a closing timer, a time limit value, a first hydrogen injection period value and a second hydrogen injection period value; the method for outputting the value of the hydrogen gas injection period, as shown in fig. 3, comprises the following steps:
s3-1: when the tail exhaust valve is opened, using an opening timer to time and setting a closing timer to be 0;
s3-2: when the tail exhaust valve is closed, using a closing timer to time and setting an opening timer to be 0;
s3-3: and judging whether the requirements are met or not according to the count values of the start timer and the stop timer and a preset time limit value, if so, outputting a second hydrogen gas injection period value, and otherwise, outputting a first hydrogen gas injection period value.
Further, in step S3-3, the judgment formula is:
in the formula, Ton、ToffThe count values of the starting timer and the closing timer are respectively; t is a preset time limit value;
if any one of the above conditions is met, the output meets the requirement;
s4: inputting the hydrogen injection quantity and the hydrogen injection period value into an injection pulse width module, and outputting a hydrogen injection pulse width value;
s5: and inputting the opening state value of the tail exhaust valve, the hydrogen injection period value and the hydrogen injection pulse width value into the driving module, and controlling the actuator according to the values.
In this embodiment, the practical application process of the driving method is shown in fig. 4, and includes the following times:
at the time A, when the tail exhaust valve is opened, the timer is started to start timing, the timer is closed and set to be 0, and T is more than 0onIf the value is less than T, outputting a hydrogen gas injection period value as a preset second hydrogen gas injection period value;
at time B, the starting timer exceeds the preset time limit value and does not meet the requirement
Under any one condition, the output hydrogen gas injection period value is a preset first hydrogen gas injection period value;
c, when the tail exhaust valve is closed, closing the timer to start timing, opening the timer to set 0, and meeting the condition that T is more than 0offIf the output jet period is less than T, the output jet period is changed into a preset second hydrogen jet period value;
at time D, the closing timer exceeds the preset time limit value and does not meet the requirement
Under any one of the conditions, the output hydrogen gas injection period value is the first hydrogen gas injection period value.
After the invention is adopted, the pressure control effect of the hydrogen gas supply system during the action of the tail gas valve can be ensured while the working time of the injection valve is prolonged by changing the injection period of the injection valve.
The invention has the beneficial effects that:
the invention has proposed proton exchange membrane fuel cell pile uses the hydrogen injection valve to drive the control system and method, in the course that the pressure fluctuation of the hydrogen gas supply system is great, especially in the course that the tail valve opens and closes, adopt the higher injection frequency to control the hydrogen injection valve, have obtained the better pressure control effect; in the process that the pressure fluctuation of the hydrogen supply system is small, namely the hydrogen injection quantity is stable, the lower injection frequency is adopted to control the hydrogen injection valve, and the working time of the injection valve is prolonged.
Claims (1)
1. A proton exchange membrane fuel cell stack hydrogen injection valve driving method is based on a proton exchange membrane fuel cell stack hydrogen injection valve driving control system, and is characterized in that the proton exchange membrane fuel cell stack hydrogen injection valve driving control system comprises a sensor, a processor and an actuator, wherein the processor comprises a hydrogen system control module, an injection pulse width module, an injection period module and a driving module;
the input end of the hydrogen system control module is in communication connection with the sensor, and the output end of the hydrogen system control module is in communication connection with the injection period module and the injection pulse width module respectively;
the input end of the injection pulse width module is in communication connection with the injection period module;
the input end of the driving module is respectively in communication connection with the hydrogen system control module, the injection pulse width module and the injection period module, and the output end of the driving module is in communication connection with the actuator;
the driving method of the hydrogen injection valve for the proton exchange membrane fuel cell stack comprises the following steps:
s1: collecting parameter signals of the fuel cell stack by using a sensor;
s2: inputting the parameter signals collected in the step S1 into a hydrogen system control module, and outputting the hydrogen injection quantity and the tail gate valve opening state value;
s3: inputting the opening state value of the tail exhaust valve into an injection period module, and outputting a hydrogen injection period value;
s4: inputting the hydrogen injection quantity and the hydrogen injection period value into an injection pulse width module, and outputting a hydrogen injection pulse width value;
s5: inputting the opening state value of the tail exhaust valve, the hydrogen injection period value and the hydrogen injection pulse width value into a driving module, and controlling an actuator according to the driving module;
in step S3, the injection period module is provided with a start timer, a stop timer, a time limit, a first hydrogen injection period value and a second hydrogen injection period value;
the method for outputting the value of the hydrogen gas injection period comprises the following steps:
s3-1: when the tail exhaust valve is opened, using an opening timer to time and setting a closing timer to be 0;
s3-2: when the tail exhaust valve is closed, using a closing timer to time and setting an opening timer to be 0;
s3-3: judging whether the requirements are met or not according to the count values of the start timer and the stop timer and a preset time limit value, if so, outputting a second hydrogen gas injection period value, and otherwise, outputting a first hydrogen gas injection period value; the first hydrogen gas injection period value is larger than the second hydrogen gas injection period value;
in step S3-3, the determination formula is:
in the formula, Ton、ToffThe count values of the starting timer and the closing timer are respectively; t is a preset time limit value;
if any one of the above conditions is satisfied, the output meets the requirement.
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| CN110797558B (en) * | 2019-11-08 | 2021-02-02 | 常州易控汽车电子股份有限公司 | Transient feedforward control system and method for hydrogen injection valve for fuel cell stack |
| CN114551942A (en) * | 2020-11-27 | 2022-05-27 | 中国科学院大连化学物理研究所 | Low-pressure operation control method for high-temperature fuel cell |
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| CN100349317C (en) * | 2003-04-08 | 2007-11-14 | 亚太燃料电池科技股份有限公司 | Control device of fuel battery and its method |
| CN100495789C (en) * | 2003-09-09 | 2009-06-03 | 丰田自动车株式会社 | Fuel cell system |
| JP2007328995A (en) * | 2006-06-07 | 2007-12-20 | Toyota Motor Corp | Fuel cell system |
| JP5252166B2 (en) * | 2006-11-22 | 2013-07-31 | トヨタ自動車株式会社 | Fuel cell system |
| US8855942B2 (en) * | 2007-06-15 | 2014-10-07 | GM Global Technology Operations LLC | Anode bleed control strategy for improved water management and hydrogen utilization |
| KR20090036014A (en) * | 2007-10-08 | 2009-04-13 | 엘지전자 주식회사 | Method of purging stack of fuel cell system |
| US8389168B2 (en) * | 2009-12-10 | 2013-03-05 | GM Global Technology Operations LLC | Injector control for fuel cell system |
| CN201868513U (en) * | 2010-11-29 | 2011-06-15 | 新源动力股份有限公司 | Anode pulse water discharging system of proton exchange membrane fuel cell |
| JP5757227B2 (en) * | 2011-12-13 | 2015-07-29 | トヨタ自動車株式会社 | Fuel cell system and control method thereof |
| KR101293979B1 (en) * | 2011-12-21 | 2013-08-07 | 현대자동차주식회사 | Control method for pressure flow oscillation in the anode of fuel cell stack |
| JP6035797B2 (en) * | 2012-03-15 | 2016-11-30 | 日産自動車株式会社 | Fuel cell system |
| KR101459849B1 (en) * | 2012-12-14 | 2014-11-07 | 현대자동차주식회사 | Oscillation operation for fuel cell system |
| KR20150072665A (en) * | 2013-12-20 | 2015-06-30 | 현대자동차주식회사 | Apparatus for detecting opening and closing of pilot operated solenoid valve for hydrogen tank and method for the same |
| CN104064790B (en) * | 2014-07-10 | 2016-08-24 | 北京亿华通科技有限公司 | The pressure regulating system of fuel cell and pressure regulating method |
| JP6225886B2 (en) * | 2014-11-14 | 2017-11-08 | トヨタ自動車株式会社 | Fuel cell system and method for discharging fluid in the system |
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