CN110120536B - Purging control method and system for fuel cell system - Google Patents

Purging control method and system for fuel cell system Download PDF

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Publication number
CN110120536B
CN110120536B CN201810122958.6A CN201810122958A CN110120536B CN 110120536 B CN110120536 B CN 110120536B CN 201810122958 A CN201810122958 A CN 201810122958A CN 110120536 B CN110120536 B CN 110120536B
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China
Prior art keywords
fuel cell
temperature information
purging
vehicle
environmental temperature
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CN201810122958.6A
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Chinese (zh)
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CN110120536A (en
Inventor
吴光平
孟德水
李飞强
陈勇刚
李玉鹏
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Yutong Bus Co Ltd
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Zhengzhou Yutong Bus Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
    • 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
    • H01M8/04156—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal
    • 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
    • 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
    • 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
    • H01M8/04492—Humidity; Ambient humidity; Water content
    • 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 relates to a purging control method and a purging control system for a fuel cell system, wherein when a fuel cell is started, environmental temperature information is obtained through an Internet of vehicles service platform; the environmental temperature information comprises environmental temperature information collected when the fuel cell is shut down; and executing the purging action according to the environment temperature information. The invention can accurately acquire the environmental temperature information of the last few days, and accurately judge according to the information, thereby accurately executing the purging action, leading the purging to be more thorough, and preventing the fuel cell system from being damaged due to incomplete purging.

Description

Purging control method and system for fuel cell system
Technical Field
The invention belongs to the technical field of fuel cells, and particularly relates to a purging control method and system of a fuel cell system.
Background
A fuel cell is a power generation device that directly converts chemical energy stored in a fuel and an oxidant into electrical energy. The fuel can be H2、NH3、N2H2The hydrocarbon is rich in H after reforming2The reforming gas and the oxidizing agent can be pure O2Or air.
The electrochemical reaction inside the fuel cell is accompanied by the generation of a large amount of water, thus making its start-up in a low-temperature environment a challenge. Under the low-temperature environment, the generated water can be immediately changed into ice to block a mass transfer channel of reaction gas, so that the problems of reduction of electrochemical reaction rate, slow start, failed start and the like are caused. Therefore, purging after shutdown is performed, and reducing the residual water inside the fuel cell is particularly important for improving the low-temperature cold start of the fuel cell.
However, in the actual use process, the purging effect of the fuel cell system is not good, and purging is often incomplete, so that the low-temperature starting of the fuel cell is difficult, and even the fuel cell is damaged.
Disclosure of Invention
The invention aims to provide a purging control method and a purging control system for a fuel cell system, which are used for solving the problem that the fuel cell system is damaged due to incomplete purging.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the invention provides a purging control method of a fuel cell system, which comprises the following method schemes:
the first method scheme comprises the following steps:
when the fuel cell is started, acquiring environmental temperature information of a vehicle operation area through the Internet of vehicles service platform; the ambient temperature information includes ambient temperature information collected in a shutdown state of the fuel cell;
and executing the purging action according to the environment temperature information.
In a second method, on the basis of the first method, the environmental temperature information includes a lowest value of the environmental temperature acquired in the fuel cell shutdown state in the last N days;
when the lowest value of the collected environment temperature of the last N days is judged to be not higher than the set temperature value, executing the purging action; otherwise, no purge action is performed.
The invention also provides a purging control system of the fuel cell system, which comprises the following system schemes:
the system scheme I comprises a fuel cell engine controller and an Internet of vehicles service platform;
the vehicle networking service platform is used for acquiring environmental temperature information of a vehicle operation area and sending the environmental temperature information to the fuel cell engine controller; the ambient temperature information includes ambient temperature information collected in a shutdown state of the fuel cell;
and the fuel cell engine controller is used for executing the purging action according to the received environment temperature information when the fuel cell is started.
In a second system scheme, on the basis of the first system scheme, the environment temperature information comprises the lowest value of the environment temperature acquired in the fuel cell shutdown state in the last N days;
the fuel cell engine controller is used for executing the purging action when judging that the lowest value of the collected environment temperature of the last N days is not higher than a set temperature value; otherwise, no purge action is performed.
The system scheme I is characterized by further comprising a vehicle control unit, wherein the vehicle control unit is in communication connection with the vehicle networking service platform and the fuel cell engine controller;
and the vehicle networking service platform sends the environment temperature information to a fuel cell engine controller through the vehicle control unit.
And on the basis of the third system scheme, the vehicle control unit is in communication connection with the fuel cell controller through a CAN bus.
The invention has the beneficial effects that:
during the operation of the fuel cell system, experiments show that the ambient temperature information of the vehicle is an important factor influencing whether the purging of the fuel cell system is complete. Generally, a temperature sensor is provided in a vehicle, and a purge operation is performed based on environmental temperature information collected by the temperature sensor. However, the vehicle may have a significant downtime, during which the ambient temperature may have changed substantially compared to before the shutdown; in addition, the temperature sensor still stores the environmental temperature information collected before the shutdown because no power supply equipment supplies power during the shutdown time, and the information obtained when the fuel cell is started is still the environmental temperature information before the startup, so that the situation of inaccurate purging judgment is caused.
According to the purging control method of the fuel cell system, the environment temperature information when the fuel cell system is shut down is obtained through the Internet of vehicles service platform when the fuel cell system is started up, and the purging action is executed according to the environment temperature information. The method can accurately acquire the environmental temperature information of the last few days, and accurately judge according to the information, so that the purging action is accurately executed, the purging is more thorough, and the condition that the fuel cell system is damaged due to incomplete purging is prevented.
According to the purging control system of the fuel cell system, the purging action is performed by using the control method, the purging of the fuel cell system is more thorough, and the safety coefficient is higher.
Drawings
FIG. 1 is a block diagram of a purge control system for a fuel cell system of the present invention;
fig. 2 is a logic diagram of a purge control method of the fuel cell system of the present invention.
Detailed Description
In order to realize the complete purging of the fuel cell system, the invention provides a purging control method of the fuel cell system, and the overall idea of the method is as follows:
when the fuel cell is started, the information collected by the temperature sensor arranged in the vehicle is not used any more, because the information stored in the temperature sensor is still the environmental temperature information collected before the vehicle is stopped, the vehicle stop time cannot be determined, the possible time is long, the environmental temperature at the time may be greatly changed when the stop time is long, and if the purging operation is still performed according to the environmental temperature information collected by the temperature sensor when the fuel cell is started, the situation that the purging is incomplete is likely to occur. Therefore, when the fuel cell is started, the recent environment temperature information collected by a third party is acquired through the Internet of vehicles service platform, and the purging action is executed according to the environment temperature information.
To implement this method, a control system as shown in fig. 1 is designed and applied to the fuel cell vehicle 1.
The system comprises a vehicle control unit 2, wherein the vehicle control unit is responsible for receiving information of a vehicle networking service platform 5 and a fuel cell engine controller 4, transmitting vehicle operation data to the vehicle networking service platform 5 and sending commands to the fuel cell engine controller 4 through a CAN bus.
The vehicle networking service platform 5 is used for acquiring the environmental temperature information from the third-party information platform 6 and transmitting the information to the vehicle control unit 2 arranged in the fuel cell vehicle 1.
The vehicle control unit 2 and the fuel cell engine controller 4 perform information interaction through a CAN bus, information transmitted by the vehicle networking service platform is transmitted to the fuel cell engine controller 4 through the CAN bus, and the fuel cell engine controller 4 adjusts a self-control strategy according to the information on the CAN bus, so that the fuel cell engine regulates and controls the self-state according to the environment temperature information.
The operation and principle of the system will now be described with reference to fig. 2 to further explain the purge control method of the fuel cell system of the present invention.
The third-party platform periodically collects the ambient temperature of the vehicle running area, extracts the lowest value of the ambient temperature in the last N days, and then transmits the lowest value to the vehicle control unit through the vehicle networking service platform.
When the vehicle is started, the fuel cell engine controller sends a temperature information request command to the vehicle control unit, and the vehicle control unit sends the environmental temperature information acquired from the vehicle networking service platform to the CAN bus after receiving the command.
The fuel cell engine controller collects information from the CAN bus (i.e., the lowest value of the ambient temperature) and compares the lowest value Tmin of the ambient temperature with a set temperature value Tset:
if Tmin is less than or equal to Tset, the fuel cell executes a purging action;
if Tmin > Tset, the fuel cell does not perform a purge operation.

Claims (4)

1. A purge control method of a fuel cell system, characterized by comprising the steps of:
when the fuel cell is started, acquiring environmental temperature information of a vehicle operation area through the Internet of vehicles service platform; the ambient temperature information includes ambient temperature information collected in a shutdown state of the fuel cell;
executing the purging action according to the environment temperature information; the environmental temperature information includes a lowest value of the environmental temperature of the last N days collected in a shutdown state of the fuel cell;
when the lowest value of the collected environment temperature of the last N days is judged to be not higher than the set temperature value, executing the purging action; otherwise, no purge action is performed.
2. A purging control system of a fuel cell system is characterized by comprising a fuel cell engine controller and a vehicle networking service platform;
the vehicle networking service platform is used for acquiring environmental temperature information of a vehicle operation area and sending the environmental temperature information to the fuel cell engine controller; the ambient temperature information includes ambient temperature information collected in a shutdown state of the fuel cell;
the fuel cell engine controller is used for executing the purging action according to the received environment temperature information when the fuel cell is started; the environmental temperature information includes a lowest value of the environmental temperature of the last N days collected in a shutdown state of the fuel cell;
the fuel cell engine controller is used for executing the purging action when judging that the lowest value of the collected environment temperature of the last N days is not higher than a set temperature value; otherwise, no purge action is performed.
3. A purge control system of a fuel cell system as claimed in claim 2, further comprising a vehicle controller, wherein the vehicle controller is in communication connection with the internet of vehicles service platform and the fuel cell engine controller;
and the vehicle networking service platform sends the environment temperature information to a fuel cell engine controller through the vehicle control unit.
4. A purge control system for a fuel cell system in accordance with claim 3, wherein said vehicle controller is communicatively coupled to said fuel cell engine controller via a CAN bus.
CN201810122958.6A 2018-02-07 2018-02-07 Purging control method and system for fuel cell system Active CN110120536B (en)

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CN110120536B true CN110120536B (en) 2020-09-01

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111082104B (en) * 2019-12-31 2021-01-01 中国汽车技术研究中心有限公司 Fuel cell stopping purging control method
CN111092248B (en) * 2019-12-31 2021-06-22 潍柴动力股份有限公司 Purging control method and device for fuel cell engine
CN111180762A (en) * 2020-01-03 2020-05-19 上海捷氢科技有限公司 Method, device and system for determining shutdown purging mode of fuel cell
CN111584902B (en) * 2020-05-26 2021-03-26 上海捷氢科技有限公司 Fuel cell system and purging method thereof
CN112072144B (en) * 2020-09-16 2021-10-15 浙江吉利控股集团有限公司 Control method and system for shutdown purging of fuel cell vehicle and vehicle
CN112786924B (en) * 2021-01-21 2023-11-14 金龙联合汽车工业（苏州）有限公司 Startup and shutdown purging control method and system of fuel cell system
CN114220992B (en) * 2021-10-29 2023-08-29 东风汽车集团股份有限公司 Purging system and purging method for fuel cell vehicle
CN114512692B (en) * 2022-01-28 2024-04-26 上海捷氢科技股份有限公司 Purging method of fuel cell, fuel cell system and fuel cell vehicle

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CN106410241A (en) * 2015-07-29 2017-02-15 现代自动车株式会社 Method and system for controlling start of fuel cell
CN107251295A (en) * 2014-11-27 2017-10-13 智能能源有限公司 Cooling agent injecting controller for fuel cell system

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Publication number Priority date Publication date Assignee Title
CN1552107A (en) * 2001-09-07 2004-12-01 Fuel cell energy management system for cold environments
KR20090039253A (en) * 2007-10-17 2009-04-22 현대자동차주식회사 Fuel cell operation stop method for improving cold starting ability
CN102522582A (en) * 2011-12-28 2012-06-27 新源动力股份有限公司 Shutdown purging system and purging method for vehicle-mounted fuel cell power generation system
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Address after: 450061 Yutong Road, Guancheng District, Zhengzhou City, Henan Province

Patentee after: Yutong Bus Co., Ltd

Address before: 450016 Yutong Road, Guancheng District, Zhengzhou City, Henan Province

Patentee before: Zhengzhou Yutong Bus Co., Ltd