CN112092627A - Automobile-used hydrogen leakage detection system - Google Patents
Automobile-used hydrogen leakage detection system Download PDFInfo
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- CN112092627A CN112092627A CN202010821027.2A CN202010821027A CN112092627A CN 112092627 A CN112092627 A CN 112092627A CN 202010821027 A CN202010821027 A CN 202010821027A CN 112092627 A CN112092627 A CN 112092627A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0053—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to fuel cells
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
- B60L58/31—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for starting of fuel cells
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3263—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers using a differential pressure detector
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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
- H01M8/04425—Pressure; Ambient pressure; Flow at auxiliary devices, e.g. reformers, compressors, burners
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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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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- General Physics & Mathematics (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a hydrogen leakage detection system for a vehicle, which is applied to a hydrogen fuel vehicle; the hydrogen leakage detection system for a vehicle includes: a control module and a pressure sensor; the pressure sensor is arranged in the hydrogen pipeline; the control module is stored with a computer program, and when the control module executes the computer program, the following steps are realized: after receiving a detection instruction, acquiring a first pressure value acquired by a pressure sensor in a hydrogen pipeline; after the first pressure value is acquired, controlling the first electromagnetic valve to open, and acquiring a second pressure value acquired by the pressure sensor in the hydrogen pipeline; determining a hydrogen leakage state according to the first pressure value and the second pressure value; the technical scheme of the invention replaces the mode of determining hydrogen leakage by detecting the hydrogen concentration in the traditional scheme, can accurately detect the hydrogen leakage in the hydrogen fuel cell electric automobile, and starts the hydrogen fuel cell after the detection is safe, thereby improving the driving safety of the hydrogen fuel cell electric automobile.
Description
Technical Field
The invention relates to the technical field of gas detection, in particular to a hydrogen leakage detection system for a vehicle.
Background
Currently, China is popularizing hydrogen fuel cell electric vehicles vigorously, has the characteristics of zero emission, high efficiency, low noise, capability of rapidly supplementing energy and the like, and is recognized as an ideal vehicle power device for replacing the traditional internal combustion engine in the future. Hydrogen is a colorless, tasteless and nontoxic gas at normal temperature and pressure, has the characteristics of inflammability, explosiveness, leakage, diffusivity and the like, and the safe use of hydrogen energy is one of important subjects for the development of current hydrogen fuel cell automobiles. In particular, hydrogen is first-ranked in the periodic table, and hydrogen molecules are small in diameter, light in weight, and easy to leak from gaps or pores compared with other gas or liquid fuels, and are extremely easy to leak, so that it is important to detect the leak property. In the existing hydrogen leakage monitoring scheme for the hydrogen fuel cell electric automobile, a hydrogen concentration sensor is usually arranged at the highest position of a hydrogen system to detect hydrogen leakage. However, the hydrogen concentration sensor is arranged in a semi-closed or open space, an alarm can be triggered only when the hydrogen leakage concentration reaches a certain set threshold value, hydrogen is easy to diffuse, slight leakage cannot be detected, and potential safety hazards exist; moreover, after the vehicle is stopped and powered off, the hydrogen leakage of the pipeline cannot be detected, so that the hydrogen leakage detection result can be obtained only after the vehicle is started, and the driving safety is not facilitated.
Therefore, an urgent need exists in the market at present for an automobile hydrogen leakage detection strategy, which can accurately detect hydrogen leakage in a hydrogen fuel cell electric automobile, and can realize that the hydrogen fuel cell is started after the detection is safe, so that the driving safety of the hydrogen fuel cell electric automobile is improved.
Disclosure of Invention
The invention provides a vehicle hydrogen leakage detection system, which can accurately detect hydrogen leakage in a hydrogen fuel cell electric vehicle, and can start a hydrogen fuel cell after the detection is safe, so that the driving safety of the hydrogen fuel cell electric vehicle is improved.
In order to solve the above technical problem, an embodiment of the present invention provides a vehicle hydrogen leakage detection system, which is applied to a hydrogen fuel vehicle, where the hydrogen fuel vehicle includes a gas storage cylinder group, a first electromagnetic valve, a hydrogen pipeline, a second electromagnetic valve, and a hydrogen fuel cell, the first electromagnetic valve is disposed at a gas output end of the gas storage cylinder group, the second electromagnetic valve is disposed at a gas input end of the hydrogen fuel cell, and the hydrogen pipeline is disposed between the first electromagnetic valve and the second electromagnetic valve; the hydrogen leakage detection system for a vehicle includes: a control module and a pressure sensor;
the pressure sensor is arranged in the hydrogen pipeline; the control module is stored with a computer program, and when the control module executes the computer program, the following steps are realized:
after receiving a detection instruction, acquiring a first pressure value acquired by the pressure sensor in the hydrogen pipeline;
after the first pressure value is acquired, controlling the first electromagnetic valve to open, and acquiring a second pressure value acquired by the pressure sensor in the hydrogen pipeline;
and determining the hydrogen leakage state according to the first pressure value and the second pressure value.
Preferably, the detection command is generated when a starting gear of the hydrogen-fueled vehicle is in a STAR gear.
Preferably, before the obtaining of the second pressure value collected by the pressure sensor in the hydrogen pipeline, the method further includes:
and when the pressure in the gas storage cylinder group and the pressure in the hydrogen pipeline reach balance, acquiring the second pressure value.
As a preferred scheme, in the step of determining the hydrogen leakage state according to the first pressure value and the second pressure value, the step of determining the hydrogen leakage state specifically includes:
when the difference value between the first pressure value and the second pressure value is not larger than a preset threshold value, determining that no hydrogen gas leaks;
and when the difference value between the first pressure value and the second pressure value is larger than a preset threshold value, determining that the hydrogen gas leaks.
Preferably, after the determination that the hydrogen gas does not leak, the method further includes: and controlling the second electromagnetic valve to be opened so as to normally start the hydrogen fuel cell.
Preferably, after the determining the hydrogen leakage, the method further comprises: and sending out an early warning signal.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
according to the technical scheme, the method for determining the hydrogen leakage by detecting the pressure difference of the hydrogen in the gas storage cylinder group and the hydrogen pipeline replaces the mode of determining the hydrogen leakage by detecting the hydrogen concentration in the traditional scheme, the hydrogen leakage in the hydrogen fuel cell electric automobile can be accurately detected, the hydrogen fuel cell is started after the detection is safe, and the driving safety of the hydrogen fuel cell electric automobile is improved.
Drawings
FIG. 1: the structure schematic diagram of the vehicle hydrogen leakage detection system provided by the embodiment of the invention is shown;
FIG. 2: the embodiment of the invention provides a control flow chart of a vehicle hydrogen leakage detection system.
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, a schematic structural diagram of a vehicle hydrogen leakage detection system according to an embodiment of the present invention is shown, where the vehicle hydrogen leakage detection system is applied to a hydrogen fuel vehicle, where the hydrogen fuel vehicle includes a gas storage cylinder group, a first electromagnetic valve, a hydrogen pipeline, a second electromagnetic valve, and a hydrogen fuel cell, the first electromagnetic valve is disposed at a gas output end of the gas storage cylinder group, the second electromagnetic valve is disposed at a gas input end of the hydrogen fuel cell, and the hydrogen pipeline is disposed between the first electromagnetic valve and the second electromagnetic valve; the hydrogen leakage detection system for a vehicle includes: a control module and a pressure sensor.
The pressure sensor is arranged in the hydrogen pipeline; the control module is stored with a computer program, and when the control module executes the computer program, the following steps from one step to three are realized:
step one, after a detection instruction is received, a first pressure value collected by the pressure sensor in the hydrogen pipeline is obtained.
Specifically, the detection command is generated when the starting gear of the hydrogen-fueled vehicle is in the STAR gear. When a user screws a key to the STAR gear fuel cell to be activated, and receives a CAN signal that 'module start is opened', the control module performs fuel cell leakage detection and records a first pressure value P of the current system pipeline2。
And step two, after the first pressure value is acquired, controlling the first electromagnetic valve to open, and acquiring a second pressure value acquired by the pressure sensor in the hydrogen pipeline.
Specifically, after the first pressure value is collected, the control module opens a first solenoid valve (solenoid valve 1 in the legend) on a cylinder port valve of the gas cylinder group, the pressure of the gas cylinder and the pressure of the pipeline reach a balance, and at the moment, the value of the pressure sensor is equal to a second pressure value P of the gas cylinder group1。
And step three, determining the hydrogen leakage state according to the first pressure value and the second pressure value.
Specifically, the control module is opposite to the pressure value P1、P2And (6) carrying out comparison. Wherein, P3Is a preset threshold.
If P1-P2≤P3Then, it means that there is no leakage of hydrogen gas, the detection is passed, the second electromagnetic valve (in the figure, the electromagnetic valve 2) is opened, and the hydrogen fuel cell is normally started.
If P1-P2＞P3If so, it indicates that the hydrogen gas is leaked and the detection is not passed, the second electromagnetic valve (in the figure, the electromagnetic valve 2) is not opened, and the instrument prompts the driver that "the hydrogen gas is leaked and please stop for inspection".
Fig. 2 is a control flow chart of a hydrogen leakage detection system for a vehicle according to an embodiment of the present invention. The locking means that the fuel cell is in a power-off and off-line state, and the unlocking means that the fuel cell is activated after receiving low voltage electricity of the whole vehicle. P1Is the pressure of hydrogen gas, P, in the gas cylinder of the hydrogen system2Is the hydrogen pressure within the hydrogen system piping. By comparing the pressure difference P in the gas storage cylinder and the pipeline3And judging whether hydrogen leaks or not.
After the fuel cell is stopped, the electromagnetic valve is closed, the gas storage cylinder is separated from the pipeline, and the hydrogen pressure in the gas storage cylinder and the hydrogen pressure in the pipeline are the same; when the machine is started again, the detection function of hydrogen leakage is realized by comparing the pressure difference of hydrogen in the gas storage cylinder and the pipeline.
According to the technical scheme, the method for determining the hydrogen leakage by detecting the pressure difference of the hydrogen in the gas storage cylinder group and the hydrogen pipeline replaces the mode of determining the hydrogen leakage by detecting the hydrogen concentration in the traditional scheme, the hydrogen leakage in the hydrogen fuel cell electric automobile can be accurately detected, the hydrogen fuel cell is started after the detection is safe, and the driving safety of the hydrogen fuel cell electric automobile is improved.
The above-mentioned embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, and it should be understood that the above-mentioned embodiments are only examples of the present invention and are not intended to limit the scope of the present invention. It should be understood that any modifications, equivalents, improvements and the like, which come within the spirit and principle of the invention, may occur to those skilled in the art and are intended to be included within the scope of the invention.
Claims (6)
1. A vehicle hydrogen leakage detection system is applied to a hydrogen fuel vehicle, wherein the hydrogen fuel vehicle comprises a gas storage cylinder group, a first electromagnetic valve, a hydrogen pipeline, a second electromagnetic valve and a hydrogen fuel cell, the first electromagnetic valve is arranged at the gas output end of the gas storage cylinder group, the second electromagnetic valve is arranged at the gas input end of the hydrogen fuel cell, and the hydrogen pipeline is arranged between the first electromagnetic valve and the second electromagnetic valve; characterized in that, the vehicle hydrogen leakage detection system includes: a control module and a pressure sensor;
the pressure sensor is arranged in the hydrogen pipeline; the control module is stored with a computer program, and when the control module executes the computer program, the following steps are realized:
after receiving a detection instruction, acquiring a first pressure value acquired by the pressure sensor in the hydrogen pipeline;
after the first pressure value is acquired, controlling the first electromagnetic valve to open, and acquiring a second pressure value acquired by the pressure sensor in the hydrogen pipeline;
and determining the hydrogen leakage state according to the first pressure value and the second pressure value.
2. A hydrogen gas leak detection system for a vehicle according to claim 1, wherein the detection instruction is generated when a starting gear of the hydrogen-fueled vehicle is in a STAR gear.
3. The hydrogen leakage detection system for vehicles according to claim 1, further comprising, before the obtaining of the second pressure value collected by the pressure sensor in the hydrogen pipe:
and when the pressure in the gas storage cylinder group and the pressure in the hydrogen pipeline reach balance, acquiring the second pressure value.
4. The hydrogen leakage detection system for a vehicle according to claim 1, wherein the step of determining the hydrogen leakage state based on the first pressure value and the second pressure value specifically includes:
when the difference value between the first pressure value and the second pressure value is not larger than a preset threshold value, determining that no hydrogen gas leaks;
and when the difference value between the first pressure value and the second pressure value is larger than a preset threshold value, determining that the hydrogen gas leaks.
5. The hydrogen leakage detection system for a vehicle according to claim 4, further comprising, after said determination that hydrogen is not leaked: and controlling the second electromagnetic valve to be opened so as to normally start the hydrogen fuel cell.
6. A hydrogen leakage detection system for a vehicle according to claim 4, further comprising, after said determination of hydrogen leakage: and sending out an early warning signal.
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| CN202010821027.2A CN112092627B (en) | 2020-08-14 | 2020-08-14 | Automobile-used hydrogen leakage detection system |
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| CN202010821027.2A CN112092627B (en) | 2020-08-14 | 2020-08-14 | Automobile-used hydrogen leakage detection system |
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Cited By (6)
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|---|---|---|---|---|
| CN112635801A (en) * | 2020-12-24 | 2021-04-09 | 北京理工大学 | Hydrogen leakage monitoring system for hydrogen-oxygen fuel cell |
| CN113022331A (en) * | 2021-03-10 | 2021-06-25 | 北京卡达克科技中心有限公司 | Hydrogen leakage monitoring and alarming method and system for fuel cell vehicle |
| CN113178600A (en) * | 2021-03-16 | 2021-07-27 | 佛山市飞驰汽车科技有限公司 | Hydrogen fuel cell automobile hydrogen conveying system and hydrogen leakage detection method |
| CN113479074A (en) * | 2021-06-22 | 2021-10-08 | 东风柳州汽车有限公司 | Battery package structure, detecting system and vehicle |
| CN114475365A (en) * | 2022-01-19 | 2022-05-13 | 广东技术师范大学 | Hydrogen fuel cell abnormity monitoring method and system for new energy automobile |
| CN114649550A (en) * | 2020-12-21 | 2022-06-21 | 北京亿华通科技股份有限公司 | Fuel cell life prediction method, fuel cell system, vehicle, and storage medium |
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