Hydrogen leak detection method for fuel cell vehicle with fuel cell system

Abstract

The invention provides a hydrogen leakage detection method for a fuel cell vehicle with a fuel cell system. The method comprises the following steps: acquiring a first hydrogen pressure attenuation value and a first hydrogen monitoring concentration of a first hydrogen supply pipeline; if the first hydrogen pressure attenuation value is smaller than or equal to a first preset threshold value and the first hydrogen monitoring concentration is smaller than or equal to a second preset threshold value, after hydrogen is conveyed to a second hydrogen supply pipeline, a second hydrogen pressure attenuation value and a second hydrogen monitoring concentration of the second hydrogen supply pipeline are obtained; if the second hydrogen pressure attenuation value is smaller than or equal to a third preset threshold value and the second hydrogen monitoring concentration is smaller than or equal to a fourth preset threshold value, hydrogen is conveyed to a third hydrogen supply pipeline, and if the third hydrogen supply pipeline does not meet the preset leakage condition, it is judged that hydrogen leakage does not exist in the fuel cell system; otherwise, judging that the fuel cell system has hydrogen leakage. According to the method, the problem that the leakage position cannot be determined in real time only by means of the hydrogen concentration sensor is solved, and the safety in the using process is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of fuel cells, and more specifically, to a hydrogen leakage detection method for a fuel cell vehicle having a fuel cell system in the field of fuel cells. Background Art

[0002] Hydrogen fuel cells are power generation devices that use hydrogen as fuel to react electrochemically with oxygen in the air to generate electricity for vehicle travel. Hydrogen is a colorless, transparent, odorless, and insoluble gas in water. When the volume concentration of hydrogen exceeds 4%, it is very easy to explode when exposed to fire. If hydrogen fuel cell vehicles equipped with hydrogen fuel cells leak hydrogen during operation, it will cause immeasurable personal and property losses. Therefore, before hydrogen fuel cells are put into use and before use, they need to be leak-checked to ensure the safety of the fuel cell system.

[0003] In the related art, a hydrogen concentration sensor is usually used to detect whether hydrogen is leaking. When the hydrogen concentration in the environment exceeds the set safety threshold, the sensor will trigger an alarm device and emit an audible and visual signal to remind people to take immediate measures.

[0004] However, relying solely on hydrogen concentration sensors to detect hydrogen leaks has a certain time delay and cannot determine the specific location of the hydrogen leak. At the same time, operating the hydrogen fuel cell system without determining whether the entire hydrogen supply system is leaking poses a high safety risk and does not meet the user's requirements for timely use of the vehicle, which urgently needs to be improved. Summary of the invention

[0005] The present application provides a hydrogen leakage detection method for a fuel cell vehicle with a fuel cell system. The method simultaneously monitors through a pressure sensor and a hydrogen concentration sensor to accurately determine whether there is a leak in the hydrogen supply pipeline of the fuel cell system and the location of the hydrogen leakage, thereby solving the problem that there is a time delay in detecting hydrogen leakage and the specific location of the hydrogen leakage cannot be determined when relying solely on the hydrogen concentration sensor. Under the conditions of not increasing the cost of the entire vehicle, not affecting the spatial layout of components, and not extending the system development cycle, the method accurately determines the hydrogen leakage problem by using the existing components of the fuel cell system, thereby ensuring the personal and property safety of users during the use of fuel cell vehicles.

[0006] In a first aspect, a hydrogen leak detection method for a fuel cell vehicle having a fuel cell system is provided, the method comprising:

[0007] Obtaining a first hydrogen pressure decay value of a first hydrogen supply pipeline and a first hydrogen monitoring concentration corresponding to the first hydrogen supply pipeline;

[0008] If the first hydrogen pressure decay value is less than or equal to a first preset threshold, and the first hydrogen monitoring concentration is less than or equal to a second preset threshold, then after the hydrogen is delivered to the second hydrogen supply pipeline, a second hydrogen pressure decay value of the second hydrogen supply pipeline and a second hydrogen monitoring concentration corresponding to the second hydrogen supply pipeline are obtained; and

[0009] If the second hydrogen pressure decay value is less than or equal to the third preset threshold, and the second hydrogen monitoring concentration is less than or equal to the fourth preset threshold, hydrogen is delivered to the third hydrogen supply pipeline, and when the third hydrogen supply pipeline does not meet the preset leakage condition, it is determined that there is no hydrogen leakage in the fuel cell system; otherwise, it is determined that there is a hydrogen leakage in the fuel cell system.

[0010] Through the above technical solution, pressure sensors and hydrogen concentration sensors are used for simultaneous monitoring to ensure that the signal will not be falsely detected, and the pressure decay threshold and hydrogen concentration threshold are set to accurately determine whether there is a leak in the hydrogen supply pipeline of the fuel cell system and the location of the hydrogen leak. Without increasing the cost of the entire vehicle, affecting the spatial layout of components, and extending the system development cycle, the existing components of the fuel cell system can be used to accurately determine the hydrogen leakage problem, thereby ensuring the personal and property safety during the use of fuel cell vehicles.

[0011] In combination with the first aspect, in some possible implementations, after delivering hydrogen to the third hydrogen supply pipeline, the method further includes:

[0012] Obtaining the actual hydrogen pressure and the current hydrogen demand pressure of the third hydrogen supply pipeline;

[0013] If the actual hydrogen pressure is equal to the current hydrogen demand pressure, stop delivering hydrogen to the third hydrogen supply pipeline, and obtain a third hydrogen pressure attenuation value of the third hydrogen supply pipeline and a third hydrogen monitoring concentration corresponding to the third hydrogen supply pipeline;

[0014] If the third hydrogen pressure decay value is less than or equal to the fifth preset threshold, and the third hydrogen monitoring concentration is less than or equal to the sixth preset threshold, it is determined that the third hydrogen supply pipeline does not meet the preset leakage condition.

[0015] Through the above technical solution, the hydrogen pressure of the hydrogen supply pipeline of the fuel cell system is monitored in real time, and the status of hydrogen supply is effectively mastered. When the actual hydrogen pressure is equal to the current hydrogen demand pressure, the hydrogen is stopped from being transported to the third hydrogen supply pipeline to avoid damage to the fuel cell system caused by excessive pressure. When it is determined that the hydrogen pressure decay value and hydrogen monitoring concentration of the third hydrogen supply pipeline are both less than the preset threshold value, it means that there is no hydrogen leakage in the system, and the fuel cell system is controlled to enter the startup process.

[0016] In combination with the first aspect and the above implementation manner, in some possible implementation manners, after obtaining the third hydrogen pressure decay value of the third hydrogen supply pipeline and the third hydrogen monitoring concentration corresponding to the third hydrogen supply pipeline, the method further includes:

[0017] If the third hydrogen pressure decay value is greater than the fifth preset threshold, or the third hydrogen monitoring concentration is greater than the sixth preset threshold, it is determined that there is a hydrogen leak in the third hydrogen supply pipeline, and the hydrogen storage bottle and the first pressure reducing valve between the second hydrogen supply pipeline and the third hydrogen supply pipeline are closed.

[0018] Through the above technical solution, when the hydrogen pressure decay value or the hydrogen monitoring concentration of the third hydrogen supply pipeline is greater than the preset threshold, hydrogen leakage is discovered in time and the hydrogen storage bottle and the first pressure reducing valve between the second hydrogen supply pipeline and the third hydrogen supply pipeline are closed to ensure the safety of the gas supply system, thereby preventing the occurrence of dangerous situations caused by hydrogen leakage.

[0019] In combination with the first aspect and the above implementation manner, in some possible implementation manners, after obtaining the first hydrogen pressure decay value of the first hydrogen supply pipeline and the first hydrogen monitoring concentration corresponding to the first hydrogen supply pipeline, the method further includes:

[0020] If the first hydrogen pressure decay value is greater than the first preset threshold, or the first hydrogen monitoring concentration is greater than the second preset threshold, it is determined that there is a hydrogen leak in the first hydrogen supply pipeline and the hydrogen storage bottle is closed.

[0021] Through the above technical solution, by setting a preset threshold, the system can automatically determine whether there is a hydrogen leak based on the hydrogen pressure decay value and hydrogen concentration of the first hydrogen supply pipeline monitored in real time, without manual intervention, reducing the error of human judgment, and being able to timely discover potential hydrogen leaks. When it is detected that the hydrogen pressure decay value is greater than the preset threshold or the hydrogen monitoring concentration is greater than the preset threshold, it means that there is a hydrogen leak in the first hydrogen supply pipeline, and the system will automatically close the hydrogen storage bottle to avoid the risk of further hydrogen leakage.

[0022] In combination with the first aspect and the above implementation manner, in some possible implementation manners, after obtaining the second hydrogen pressure decay value of the second hydrogen supply pipeline and the second hydrogen monitoring concentration corresponding to the second hydrogen supply pipeline, the method further includes:

[0023] If the second hydrogen pressure decay value is greater than the third preset threshold, or the second hydrogen monitoring concentration is greater than the fourth preset threshold, it is determined that there is a hydrogen leak in the second hydrogen supply pipeline, and the hydrogen storage bottle and the second pressure reducing valve between the first hydrogen supply pipeline and the second hydrogen supply pipeline are closed.

[0024] Through the above technical solution, by comparing the second hydrogen pressure decay value and the second hydrogen detection concentration monitored in real time on the second hydrogen supply pipeline with the preset threshold, it is possible to accurately determine whether there is a hydrogen leak in the second hydrogen supply pipeline. When there is a hydrogen leak in the second hydrogen supply pipeline, the hydrogen supply is stopped by timely closing the hydrogen storage bottle valve and the second pressure reducing valve, thereby effectively avoiding the continuous occurrence of hydrogen leakage and ensuring the safety of the system.

[0025] In combination with the first aspect and the above implementations, in some possible implementations, after closing the hydrogen storage bottle, the method further includes:

[0026] The vehicle is controlled to give an acoustic alarm and / or an optical alarm, and the fuel cell system or the fuel cell vehicle is prohibited from starting.

[0027] Through the above technical solution, when hydrogen leakage is detected and the hydrogen storage bottle is closed, the user is reminded of the danger of hydrogen leakage through acoustic alarm and / or optical alarm, so that the user can take necessary safety measures. At the same time, prohibiting the start of the fuel cell system or prohibiting the start of the fuel cell vehicle can avoid starting the system or vehicle in the event of hydrogen leakage, thereby preventing potential fire or explosion accidents and protecting people's personal and property safety.

[0028] In combination with the first aspect and the above-mentioned implementations, in certain possible implementations, the hydrogen pressure of the first hydrogen supply pipeline is greater than the hydrogen pressure of the second hydrogen supply pipeline, and the hydrogen pressure of the second hydrogen supply pipeline is greater than the hydrogen pressure of the third hydrogen supply pipeline.

[0029] Through the above technical solution, the first hydrogen supply pipeline can withstand higher pressure and can effectively store and transmit hydrogen. The second hydrogen supply pipeline can reduce the pressure of the hydrogen in the first hydrogen supply pipeline to make it suitable for further transmission and supply. The third hydrogen supply pipeline can further reduce the pressure of the hydrogen in the second hydrogen supply pipeline to meet the requirements of the low-pressure sensor.

[0030] According to the hydrogen leakage detection method for a fuel cell vehicle with a fuel cell system in an embodiment of the present application, a first hydrogen pressure decay value and a first hydrogen monitoring concentration of a first hydrogen supply pipeline are obtained; if the first hydrogen pressure decay value is less than or equal to a first preset threshold value, and the first hydrogen monitoring concentration is less than or equal to a second preset threshold value, then after the hydrogen is transported to the second hydrogen supply pipeline, a second hydrogen pressure decay value and a second hydrogen monitoring concentration of the second hydrogen supply pipeline are obtained; if the second hydrogen pressure decay value is less than or equal to a third preset threshold value, and the second hydrogen monitoring concentration is less than or equal to a fourth preset threshold value, hydrogen is transported to the third hydrogen supply pipeline, and when the third hydrogen supply pipeline does not meet the preset leakage condition, it is determined that there is no hydrogen leakage in the fuel cell system, otherwise, it is determined that there is a hydrogen leakage in the fuel cell system. The method simultaneously monitors through a pressure sensor and a hydrogen concentration sensor to accurately determine whether there is a leak in the hydrogen supply pipeline of the fuel cell system and the location of the hydrogen leak, thereby solving the problem that only relying on the hydrogen concentration sensor to detect hydrogen leaks has a time delay and cannot determine the specific location of the hydrogen leak. Without increasing the cost of the entire vehicle, affecting the spatial layout of components, and not extending the system development cycle, the method uses the existing components of the fuel cell system to accurately determine the hydrogen leakage problem, thereby ensuring the personal and property safety of users when using fuel cell vehicles.

[0031] In a second aspect, a hydrogen leak detection device for a fuel cell vehicle having a fuel cell system is provided, the device comprising:

[0032] An acquisition module, used to acquire a first hydrogen pressure decay value of a first hydrogen supply pipeline and a first hydrogen monitoring concentration corresponding to the first hydrogen supply pipeline;

[0033] a first detection module, configured to obtain, after the hydrogen is delivered to the second hydrogen supply pipeline, a second hydrogen pressure decay value of the second hydrogen supply pipeline and a second hydrogen monitoring concentration corresponding to the second hydrogen supply pipeline if the first hydrogen pressure decay value is less than or equal to a first preset threshold value and the first hydrogen monitoring concentration is less than or equal to a second preset threshold value; and

[0034] The second detection module is used to deliver hydrogen to the third hydrogen supply pipeline if the second hydrogen pressure decay value is less than or equal to a third preset threshold and the second hydrogen monitoring concentration is less than or equal to a fourth preset threshold, and to determine that there is no hydrogen leakage in the fuel cell system when the third hydrogen supply pipeline does not meet the preset leakage condition; otherwise, it is determined that there is a hydrogen leakage in the fuel cell system.

[0035] In conjunction with the second aspect, in some possible implementations, after delivering hydrogen to the third hydrogen supply pipeline, the second detection module further includes:

[0036] Obtaining the actual hydrogen pressure and the current hydrogen demand pressure of the third hydrogen supply pipeline;

[0037] If the actual hydrogen pressure is equal to the current hydrogen demand pressure, stop delivering hydrogen to the third hydrogen supply pipeline, and obtain a third hydrogen pressure attenuation value of the third hydrogen supply pipeline and a third hydrogen monitoring concentration corresponding to the third hydrogen supply pipeline;

[0038] If the third hydrogen pressure decay value is less than or equal to the fifth preset threshold, and the third hydrogen monitoring concentration is less than or equal to the sixth preset threshold, it is determined that the third hydrogen supply pipeline does not meet the preset leakage condition.

[0039] In combination with the second aspect and the above implementation manner, in some possible implementation manners, after obtaining the third hydrogen pressure decay value of the third hydrogen supply pipeline and the third hydrogen monitoring concentration corresponding to the third hydrogen supply pipeline, the method further includes:

[0040] If the third hydrogen pressure decay value is greater than the fifth preset threshold, or the third hydrogen monitoring concentration is greater than the sixth preset threshold, it is determined that there is a hydrogen leak in the third hydrogen supply pipeline, and the hydrogen storage bottle and the first pressure reducing valve between the second hydrogen supply pipeline and the third hydrogen supply pipeline are closed.

[0041] In combination with the second aspect and the above implementation manner, in some possible implementation manners, after obtaining the first hydrogen pressure decay value of the first hydrogen supply pipeline and the first hydrogen monitoring concentration corresponding to the first hydrogen supply pipeline, the acquisition module further includes:

[0042] If the first hydrogen pressure decay value is greater than the first preset threshold, or the first hydrogen monitoring concentration is greater than the second preset threshold, it is determined that there is a hydrogen leak in the first hydrogen supply pipeline and the hydrogen storage bottle is closed.

[0043] In combination with the second aspect and the above implementation manner, in some possible implementation manners, after obtaining the second hydrogen pressure decay value of the second hydrogen supply pipeline and the second hydrogen monitoring concentration corresponding to the second hydrogen supply pipeline, the first detection module further includes:

[0044] If the second hydrogen pressure decay value is greater than the third preset threshold, or the second hydrogen monitoring concentration is greater than the fourth preset threshold, it is determined that there is a hydrogen leak in the second hydrogen supply pipeline, and the hydrogen storage bottle and the second pressure reducing valve between the first hydrogen supply pipeline and the second hydrogen supply pipeline are closed.

[0045] In combination with the second aspect and the above implementations, in some possible implementations, after closing the hydrogen storage bottle, the method further includes:

[0046] The vehicle is controlled to give an acoustic alarm and / or an optical alarm, and the fuel cell system or the fuel cell vehicle is prohibited from starting.

[0047] In combination with the second aspect and the above-mentioned implementations, in certain possible implementations, the hydrogen pressure of the first hydrogen supply pipeline is greater than the hydrogen pressure of the second hydrogen supply pipeline, and the hydrogen pressure of the second hydrogen supply pipeline is greater than the hydrogen pressure of the third hydrogen supply pipeline.

[0048] According to the embodiment of the present application, a hydrogen leakage detection device for a fuel cell vehicle with a fuel cell system is used to obtain a first hydrogen pressure decay value and a first hydrogen monitoring concentration of a first hydrogen supply pipeline; if the first hydrogen pressure decay value is less than or equal to a first preset threshold value, and the first hydrogen monitoring concentration is less than or equal to a second preset threshold value, then after the hydrogen is transported to the second hydrogen supply pipeline, a second hydrogen pressure decay value and a second hydrogen monitoring concentration of the second hydrogen supply pipeline are obtained; if the second hydrogen pressure decay value is less than or equal to a third preset threshold value, and the second hydrogen monitoring concentration is less than or equal to a fourth preset threshold value, hydrogen is transported to the third hydrogen supply pipeline, and when the third hydrogen supply pipeline does not meet the preset leakage condition, it is determined that there is no hydrogen leakage in the fuel cell system, otherwise, it is determined that there is a hydrogen leakage in the fuel cell system. The method simultaneously monitors through a pressure sensor and a hydrogen concentration sensor to accurately determine whether there is a leak in the hydrogen supply pipeline of the fuel cell system and the location of the hydrogen leak, thereby solving the problem that only relying on the hydrogen concentration sensor to detect hydrogen leaks has a time delay and cannot determine the specific location of the hydrogen leak. Without increasing the cost of the entire vehicle, affecting the spatial layout of components, and not extending the system development cycle, the method uses the existing components of the fuel cell system to accurately determine the hydrogen leakage problem, thereby ensuring the personal and property safety of users when using fuel cell vehicles.

[0049] In a third aspect, a fuel cell vehicle is provided, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the hydrogen leak detection method for a fuel cell vehicle having a fuel cell system as described in the above embodiment.

[0050] In a fourth aspect, a computer-readable storage medium is provided, which stores a computer program code. When the computer program code runs on a computer, the computer executes the method in the above-mentioned first aspect or any possible implementation manner of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A flowchart of a hydrogen leakage detection method for a fuel cell vehicle having a fuel cell system provided according to an embodiment of the present application;

[0052] Figure 2is a flowchart of a hydrogen leak detection method for a fuel cell vehicle having a fuel cell system according to an embodiment of the present application;

[0053] Figure 3 is a block diagram of a hydrogen leak detection device for a fuel cell vehicle having a fuel cell system according to an embodiment of the present application;

[0054] Figure 4 A schematic diagram of the structure of a fuel cell vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0055] The technical solution in the present application will be described clearly and in detail below in conjunction with the accompanying drawings. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B: "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0056] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0057] Those skilled in the art may understand that the traditional strategy is to usually use a hydrogen concentration sensor to detect whether a hydrogen leak occurs. However, relying solely on a hydrogen concentration sensor to detect whether a hydrogen leak occurs has a certain time delay and cannot determine the specific location of the hydrogen leak. At the same time, operating the hydrogen fuel cell system without determining whether the entire hydrogen supply system is leaking poses a high safety risk and does not meet the user's requirements for timely use of the vehicle.

[0058] Therefore, the present application proposes a hydrogen leakage detection method for a fuel cell vehicle with a fuel cell system. The method simultaneously monitors through a pressure sensor and a hydrogen concentration sensor to accurately determine whether there is a leak in the hydrogen supply pipeline of the fuel cell system and the location of the hydrogen leakage, thereby solving the problem that only relying on the hydrogen concentration sensor to detect hydrogen leakage has a time delay and cannot determine the specific location of the hydrogen leakage. Without increasing the cost of the entire vehicle, affecting the spatial layout of components, and extending the system development cycle, the method uses the existing components of the fuel cell system to accurately determine the hydrogen leakage problem, thereby ensuring the personal and property safety of users during the use of fuel cell vehicles.

[0059] Specifically, Figure 1A flow chart of a hydrogen leak detection method for a fuel cell vehicle having a fuel cell system provided in an embodiment of the present application.

[0060] For example, Figure 1 As shown, the hydrogen leak detection method for a fuel cell vehicle having a fuel cell system comprises the following steps:

[0061] In step S101, a first hydrogen pressure decay value of a first hydrogen supply pipeline and a first hydrogen monitoring concentration corresponding to the first hydrogen supply pipeline are obtained.

[0062] Specifically, the embodiment of the present application can obtain the first hydrogen pressure attenuation value of the first hydrogen supply pipeline through a pressure sensor, and can also obtain the first hydrogen monitoring concentration corresponding to the first hydrogen supply pipeline through a hydrogen concentration sensor.

[0063] It should be noted that the above-mentioned obtaining of the first hydrogen pressure decay value by the pressure sensor and the obtaining of the first hydrogen monitoring concentration by the hydrogen concentration sensor are only exemplary and are not intended to be a limitation of the present application. Those skilled in the art may adopt other methods to obtain the first hydrogen pressure decay value of the first hydrogen supply pipeline and the first hydrogen monitoring concentration corresponding to the first hydrogen supply pipeline according to actual conditions. To avoid redundancy, they are not described in detail here.

[0064] In step S102, if the first hydrogen pressure decay value is less than or equal to the first preset threshold, and the first hydrogen monitoring concentration is less than or equal to the second preset threshold, then after the hydrogen is transported to the second hydrogen supply pipeline, the second hydrogen pressure decay value of the second hydrogen supply pipeline and the second hydrogen monitoring concentration corresponding to the second hydrogen supply pipeline are obtained.

[0065] Specifically, when the first hydrogen pressure decay value is less than or equal to the first preset threshold, and the first hydrogen monitoring concentration is less than or equal to the second preset threshold, it means that there is no hydrogen leakage in the first hydrogen supply pipeline. The embodiment of the present application can transport hydrogen to the second hydrogen supply pipeline through a pressure reducing valve, and can use a pressure sensor and a hydrogen concentration sensor installed in the second hydrogen supply pipeline to monitor the second hydrogen pressure decay value of the second hydrogen supply pipeline and the second hydrogen monitoring concentration corresponding to the second hydrogen supply pipeline in real time, so as to promptly detect hydrogen leakage in the second hydrogen supply pipeline.

[0066] It should be noted that, in some embodiments, the hydrogen pressure of the first hydrogen supply pipeline is greater than the hydrogen pressure of the second hydrogen supply pipeline. In other words, the first hydrogen supply pipeline can withstand a higher pressure and can effectively store and transmit hydrogen, and the second hydrogen supply pipeline can decompress the hydrogen in the first hydrogen supply pipeline to make it suitable for further transmission and supply.

[0067] In step S103, if the second hydrogen pressure decay value is less than or equal to the third preset threshold value, and the second hydrogen monitoring concentration is less than or equal to the fourth preset threshold value, hydrogen is delivered to the third hydrogen supply pipeline, and when the third hydrogen supply pipeline does not meet the preset leakage condition, it is determined that there is no hydrogen leakage in the fuel cell system, otherwise, it is determined that there is a hydrogen leakage in the fuel cell system.

[0068] Specifically, when the second hydrogen pressure decay value is less than or equal to the third preset threshold, and the second hydrogen monitoring concentration is less than or equal to the fourth preset threshold, it indicates that there is no hydrogen leakage in the second hydrogen supply pipeline, and hydrogen is transported to the third hydrogen supply pipeline through the hydrogen injector.

[0069] It can be understood that if the third hydrogen supply pipeline does not meet the preset leakage condition, it means that no hydrogen leakage occurs in the first hydrogen supply pipeline, the second hydrogen supply pipeline and the third hydrogen supply pipeline of the embodiment of the present application, and the hydrogen leakage detection is completed. The fuel cell system can be controlled to enter a normal startup process. Otherwise, it means that hydrogen leakage occurs in the first hydrogen supply pipeline, the second hydrogen supply pipeline or the third hydrogen supply pipeline.

[0070] It should be noted that the hydrogen pressure of the second hydrogen supply pipeline is greater than the hydrogen pressure of the third hydrogen supply pipeline, that is, the third hydrogen supply pipeline can further reduce the pressure of the hydrogen in the second hydrogen supply pipeline to meet the requirements of the low-pressure sensor.

[0071] Among them, in some embodiments, after hydrogen is transported to the third hydrogen supply pipeline, it also includes: obtaining the actual hydrogen pressure and the current hydrogen demand pressure of the third hydrogen supply pipeline; if the actual hydrogen pressure is equal to the current hydrogen demand pressure, stopping the transportation of hydrogen to the third hydrogen supply pipeline, and obtaining the third hydrogen pressure decay value of the third hydrogen supply pipeline and the third hydrogen monitoring concentration corresponding to the third hydrogen supply pipeline; if the third hydrogen pressure decay value is less than or equal to the fifth preset threshold, and the third hydrogen monitoring concentration is less than or equal to the sixth preset threshold, it is determined that the third hydrogen supply pipeline does not meet the preset leakage condition.

[0072] The current demand pressure may be a pressure value preset by a user, a pressure value obtained through a limited number of experiments, or a pressure value obtained through a limited number of computer simulations, and is not specifically limited here. The fifth preset threshold and the sixth preset threshold may be thresholds preset by a user, a threshold obtained through a limited number of experiments, or a threshold obtained through a limited number of computer simulations, and are not specifically limited here.

[0073] Specifically, the embodiment of the present application can obtain the actual hydrogen pressure and the current hydrogen demand pressure of the third hydrogen supply pipeline through a pressure sensor. When the hydrogen injector transports hydrogen to the third hydrogen supply pipeline until the actual hydrogen pressure is equal to the current hydrogen demand pressure, the hydrogen transportation is stopped. At the same time, the third hydrogen pressure decay value of the third hydrogen supply pipeline and the third hydrogen monitoring concentration corresponding to the third hydrogen supply pipeline can be obtained through the pressure sensor and the hydrogen concentration sensor installed in the third hydrogen supply pipeline. When the third hydrogen pressure decay value is less than or equal to the fifth preset threshold value, and the third hydrogen monitoring concentration is less than or equal to the sixth preset threshold value, it means that no hydrogen leakage has occurred in the third hydrogen supply pipeline, that is, the preset leakage condition is not met.

[0074] In addition, the embodiments of the present application can also take corresponding measures in a timely manner when it is determined that there is a hydrogen leak in any hydrogen supply pipeline to ensure safety.

[0075] Furthermore, in some embodiments, after obtaining the first hydrogen pressure decay value of the first hydrogen supply pipeline and the first hydrogen monitoring concentration corresponding to the first hydrogen supply pipeline, it also includes: if the first hydrogen pressure decay value is greater than a first preset threshold, or the first hydrogen monitoring concentration is greater than a second preset threshold, it is determined that there is a hydrogen leak in the first hydrogen supply pipeline, and the hydrogen storage bottle is closed.

[0076] The first preset threshold and the second preset threshold may be thresholds preset by a user, thresholds obtained through a limited number of experiments, or thresholds obtained through a limited number of computer simulations, which are not specifically limited here.

[0077] Specifically, when the hydrogen pressure decay value or hydrogen concentration of the first hydrogen supply pipeline monitored in real time is greater than a preset threshold, it is automatically determined that there is a hydrogen leak in the first hydrogen supply pipeline, and the system will automatically close the hydrogen storage bottle to prevent further leakage of hydrogen from the source, avoiding further safety problems, effectively reducing the probability of accidents, and ensuring the safety of personnel and equipment.

[0078] Furthermore, in some embodiments, after obtaining the second hydrogen pressure decay value of the second hydrogen supply pipeline and the second hydrogen monitoring concentration corresponding to the second hydrogen supply pipeline, it also includes: if the second hydrogen pressure decay value is greater than a third preset threshold, or the second hydrogen monitoring concentration is greater than a fourth preset threshold, it is determined that there is a hydrogen leak in the second hydrogen supply pipeline, and the second pressure reducing valve between the hydrogen storage bottle and the first hydrogen supply pipeline and the second hydrogen supply pipeline is closed.

[0079] The third preset threshold and the fourth preset threshold may be thresholds preset by a user, thresholds obtained through a limited number of experiments, or thresholds obtained through a limited number of computer simulations, which are not specifically limited here.

[0080] Specifically, by comparing the second hydrogen pressure decay value and the second hydrogen detection concentration monitored in real time on the second hydrogen supply pipeline with the preset threshold, it is possible to accurately determine whether there is a hydrogen leak in the second hydrogen supply pipeline. When the second hydrogen pressure decay value or the second hydrogen detection concentration is greater than the preset threshold, that is, when there is a hydrogen leak in the second hydrogen supply pipeline, the hydrogen supply is stopped by timely closing the hydrogen storage bottle valve and the second pressure reducing valve between the first hydrogen supply pipeline and the second hydrogen supply pipeline, thereby effectively avoiding the continuous occurrence of hydrogen leakage and ensuring the safety of the system.

[0081] Furthermore, in some embodiments, after obtaining the third hydrogen pressure decay value of the third hydrogen supply pipeline and the third hydrogen monitoring concentration corresponding to the third hydrogen supply pipeline, it also includes: if the third hydrogen pressure decay value is greater than the fifth preset threshold, or the third hydrogen monitoring concentration is greater than the sixth preset threshold, it is determined that there is a hydrogen leak in the third hydrogen supply pipeline, and the hydrogen storage bottle and the first pressure reducing valve between the second hydrogen supply pipeline and the third hydrogen supply pipeline are closed.

[0082] Specifically, by comparing the third hydrogen pressure decay value and the third hydrogen detection concentration monitored in real time on the third hydrogen supply pipeline with the preset threshold, it is possible to accurately determine whether there is a hydrogen leak in the third hydrogen supply pipeline. When the third hydrogen pressure decay value or the third hydrogen detection concentration is greater than the preset threshold, that is, when there is a hydrogen leak in the third hydrogen supply pipeline, the hydrogen supply is stopped by timely closing the hydrogen storage bottle valve and the first pressure reducing valve between the second hydrogen supply pipeline and the third hydrogen supply pipeline, thereby effectively avoiding the continuous occurrence of hydrogen leakage and ensuring the safety of personnel and equipment.

[0083] Therefore, by real-time monitoring of the hydrogen pressure attenuation value and hydrogen detection concentration of the hydrogen supply pipeline, it is possible to quickly and accurately determine whether there is a leak in the hydrogen supply pipeline of the fuel cell system and the specific location of the hydrogen leak. By promptly closing the hydrogen storage bottle valve and the pressure reducing valve, the hydrogen supply is stopped, thereby effectively avoiding the continued occurrence of hydrogen leakage and ensuring the personal and property safety of users when using fuel cell vehicles.

[0084] In addition, in order to further ensure the personal and property safety of users when using fuel cell vehicles, the embodiment of the present application can remind users by means of an alarm when there is a hydrogen leak.

[0085] As a possible implementation method, in some embodiments, after closing the hydrogen storage bottle, it also includes: controlling the vehicle to give an acoustic alarm reminder and / or a visual alarm reminder, and prohibiting the start of the fuel cell system or prohibiting the start of the fuel cell vehicle.

[0086] Preferably, the acoustic alarm reminder method can be a sound alarm on the vehicle instrument, and the optical alarm reminder method can be a flashing "Hydrogen leakage detected" text on the vehicle instrument, which is not specifically limited here.

[0087] Specifically, when a hydrogen leak is detected and the hydrogen storage bottle is closed, the vehicle is controlled to give an acoustic alarm or an optical alarm or a combination of an acoustic alarm and an optical alarm to remind the user of the danger of hydrogen leakage, so that the user can take necessary safety measures. At the same time, starting the fuel cell system or the fuel cell vehicle is prohibited, which can avoid starting the system or vehicle in the event of a hydrogen leak, thereby preventing potential fire or explosion accidents and protecting people's life and property safety.

[0088] For example, when a hydrogen leak is detected and the hydrogen storage bottle is closed, the vehicle's instrument panel is controlled to emit a "hydrogen leak detected" sound as an alarm reminder, and the vehicle's instrument panel flashes the text "hydrogen leak detected" as an alarm reminder, alerting the user to the danger of hydrogen leakage, and at the same time prohibiting the start of the fuel cell system or the fuel cell vehicle.

[0089] In order to enable those skilled in the art to further understand the hydrogen leakage detection method for a fuel cell vehicle with a fuel cell system according to an embodiment of the present application, it is described in detail below in conjunction with specific embodiments.

[0090] like Figure 2 As shown, the hydrogen leakage detection method for a fuel cell vehicle having a fuel cell system comprises the following steps:

[0091] S201, vehicle power supply.

[0092] S202, hydrogen leak check starts.

[0093] S203, the hydrogen storage bottle valve is opened and the pressure reducing valve is closed.

[0094] S204, determine whether the pressure decay value of the high-pressure pipeline pressure sensor is less than or equal to the threshold and whether the hydrogen concentration value monitored by the hydrogen concentration sensor is less than or equal to the threshold. If yes, execute S205; otherwise, execute S212.

[0095] S205, the pressure reducing valve opens.

[0096] S206, determine whether the pressure decay value of the medium pressure pipeline pressure sensor is less than or equal to the threshold and whether the hydrogen concentration value monitored by the hydrogen concentration sensor is less than or equal to the threshold, if yes, execute S207, otherwise, execute S212.

[0097] S207, the hydrogen low-pressure pipeline sets the hydrogen demand value, and the hydrogen injector delivers hydrogen.

[0098] S208, when the low-pressure pipeline hydrogen monitoring pressure is equal to the hydrogen low-pressure pipeline demand value, the hydrogen injector stops delivering hydrogen.

[0099] S209, determine whether the pressure decay value of the low-pressure pipeline pressure sensor is less than or equal to the threshold and whether the hydrogen concentration value monitored by the hydrogen concentration sensor is less than or equal to the threshold. If yes, execute S210, otherwise, execute S212.

[0100] S210, hydrogen leakage inspection is completed.

[0101] S211, the hydrogen fuel cell system startup process begins.

[0102] S212, the hydrogen storage bottle valve is closed.

[0103] S213, vehicle instrument text and picture alarm, vehicle instrument sound alarm, hydrogen fuel cell system and fuel cell vehicle are prohibited from starting.

[0104] According to the hydrogen leakage detection method for a fuel cell vehicle with a fuel cell system in an embodiment of the present application, a first hydrogen pressure decay value and a first hydrogen monitoring concentration of a first hydrogen supply pipeline are obtained; if the first hydrogen pressure decay value is less than or equal to a first preset threshold value, and the first hydrogen monitoring concentration is less than or equal to a second preset threshold value, then after the hydrogen is transported to the second hydrogen supply pipeline, a second hydrogen pressure decay value and a second hydrogen monitoring concentration of the second hydrogen supply pipeline are obtained; if the second hydrogen pressure decay value is less than or equal to a third preset threshold value, and the second hydrogen monitoring concentration is less than or equal to a fourth preset threshold value, hydrogen is transported to the third hydrogen supply pipeline, and when the third hydrogen supply pipeline does not meet the preset leakage condition, it is determined that there is no hydrogen leakage in the fuel cell system, otherwise, it is determined that there is a hydrogen leakage in the fuel cell system. The method simultaneously monitors through a pressure sensor and a hydrogen concentration sensor to accurately determine whether there is a leak in the hydrogen supply pipeline of the fuel cell system and the location of the hydrogen leak, thereby solving the problem that only relying on the hydrogen concentration sensor to detect hydrogen leaks has a time delay and cannot determine the specific location of the hydrogen leak. Without increasing the cost of the entire vehicle, affecting the spatial layout of components, and not extending the system development cycle, the method uses the existing components of the fuel cell system to accurately determine the hydrogen leakage problem, thereby ensuring the personal and property safety of users when using fuel cell vehicles.

[0105] Next, a hydrogen leakage detection device for a fuel cell vehicle having a fuel cell system proposed in accordance with an embodiment of the present application will be described with reference to the accompanying drawings.

[0106] Figure 3 It is a block diagram of a hydrogen leak detection device 10 for a fuel cell vehicle having a fuel cell system provided in an embodiment of the present application.

[0107] For example, Figure 3 As shown, the hydrogen leak detection device 10 for a fuel cell vehicle having a fuel cell system may include:

[0108] An acquisition module 100 is used to acquire a first hydrogen pressure decay value of a first hydrogen supply pipeline and a first hydrogen monitoring concentration corresponding to the first hydrogen supply pipeline;

[0109] A first detection module 200, for obtaining a second hydrogen pressure decay value of the second hydrogen supply pipeline and a second hydrogen monitoring concentration corresponding to the second hydrogen supply pipeline after the hydrogen is delivered to the second hydrogen supply pipeline if the first hydrogen pressure decay value is less than or equal to the first preset threshold value and the first hydrogen monitoring concentration is less than or equal to the second preset threshold value; and

[0110] The second detection module 300 is used to deliver hydrogen to the third hydrogen supply pipeline if the second hydrogen pressure decay value is less than or equal to the third preset threshold value and the second hydrogen monitoring concentration is less than or equal to the fourth preset threshold value, and to determine that there is no hydrogen leakage in the fuel cell system when the third hydrogen supply pipeline does not meet the preset leakage condition, otherwise, it is determined that there is a hydrogen leakage in the fuel cell system.

[0111] Furthermore, in some embodiments, after delivering hydrogen to the third hydrogen supply pipeline, the second detection module 300 also includes: obtaining the actual hydrogen pressure and the current hydrogen demand pressure of the third hydrogen supply pipeline; if the actual hydrogen pressure is equal to the current hydrogen demand pressure, stopping the delivery of hydrogen to the third hydrogen supply pipeline, and obtaining the third hydrogen pressure decay value of the third hydrogen supply pipeline and the third hydrogen monitoring concentration corresponding to the third hydrogen supply pipeline; if the third hydrogen pressure decay value is less than or equal to the fifth preset threshold, and the third hydrogen monitoring concentration is less than or equal to the sixth preset threshold, it is determined that the third hydrogen supply pipeline does not meet the preset leakage condition.

[0112] Furthermore, in some embodiments, after obtaining the third hydrogen pressure decay value of the third hydrogen supply pipeline and the third hydrogen monitoring concentration corresponding to the third hydrogen supply pipeline, it also includes: if the third hydrogen pressure decay value is greater than the fifth preset threshold, or the third hydrogen monitoring concentration is greater than the sixth preset threshold, it is determined that there is a hydrogen leak in the third hydrogen supply pipeline, and the hydrogen storage bottle and the first pressure reducing valve between the second hydrogen supply pipeline and the third hydrogen supply pipeline are closed.

[0113] Furthermore, in some embodiments, after obtaining the first hydrogen pressure decay value of the first hydrogen supply pipeline and the first hydrogen monitoring concentration corresponding to the first hydrogen supply pipeline, the acquisition module 100 also includes: if the first hydrogen pressure decay value is greater than the first preset threshold, or the first hydrogen monitoring concentration is greater than the second preset threshold, it is determined that there is a hydrogen leak in the first hydrogen supply pipeline, and the hydrogen storage bottle is closed.

[0114] Furthermore, in some embodiments, after obtaining the second hydrogen pressure decay value of the second hydrogen supply pipeline and the second hydrogen monitoring concentration corresponding to the second hydrogen supply pipeline, the first detection module 200 also includes: if the second hydrogen pressure decay value is greater than the third preset threshold, or the second hydrogen monitoring concentration is greater than the fourth preset threshold, it is determined that there is a hydrogen leak in the second hydrogen supply pipeline, and the second pressure reducing valve between the hydrogen storage bottle and the first hydrogen supply pipeline and the second hydrogen supply pipeline is closed.

[0115] Furthermore, in some embodiments, after the hydrogen storage bottle is closed, the method further includes: controlling the vehicle to give an acoustic alarm and / or an optical alarm, and prohibiting the start of the fuel cell system or prohibiting the start of the fuel cell vehicle.

[0116] Furthermore, in some embodiments, the hydrogen pressure of the first hydrogen supply pipeline is greater than the hydrogen pressure of the second hydrogen supply pipeline, and the hydrogen pressure of the second hydrogen supply pipeline is greater than the hydrogen pressure of the third hydrogen supply pipeline.

[0117] It should be noted that the above explanation of the embodiment of the hydrogen leakage detection method for a fuel cell vehicle with a fuel cell system is also applicable to the hydrogen leakage detection device for a fuel cell vehicle with a fuel cell system of this embodiment, and will not be repeated here.

[0118] According to the embodiment of the present application, a hydrogen leakage detection device for a fuel cell vehicle with a fuel cell system is used to obtain a first hydrogen pressure decay value and a first hydrogen monitoring concentration of a first hydrogen supply pipeline; if the first hydrogen pressure decay value is less than or equal to a first preset threshold value, and the first hydrogen monitoring concentration is less than or equal to a second preset threshold value, then after the hydrogen is transported to the second hydrogen supply pipeline, a second hydrogen pressure decay value and a second hydrogen monitoring concentration of the second hydrogen supply pipeline are obtained; if the second hydrogen pressure decay value is less than or equal to a third preset threshold value, and the second hydrogen monitoring concentration is less than or equal to a fourth preset threshold value, hydrogen is transported to the third hydrogen supply pipeline, and when the third hydrogen supply pipeline does not meet the preset leakage condition, it is determined that there is no hydrogen leakage in the fuel cell system, otherwise, it is determined that there is a hydrogen leakage in the fuel cell system. The method simultaneously monitors through a pressure sensor and a hydrogen concentration sensor to accurately determine whether there is a leak in the hydrogen supply pipeline of the fuel cell system and the location of the hydrogen leak, thereby solving the problem that only relying on the hydrogen concentration sensor to detect hydrogen leaks has a time delay and cannot determine the specific location of the hydrogen leak. Without increasing the cost of the entire vehicle, affecting the spatial layout of components, and not extending the system development cycle, the method uses the existing components of the fuel cell system to accurately determine the hydrogen leakage problem, thereby ensuring the personal and property safety of users when using fuel cell vehicles.

[0119] Figure 4 A schematic diagram of the structure of a fuel cell vehicle provided in an embodiment of the present application. The fuel cell vehicle may include:

[0120] Memory 401 , processor 402 , and a computer program stored in the memory 401 and executable on the processor 402 .

[0121] When the processor 402 executes the program, the hydrogen leakage detection method for a fuel cell vehicle having a fuel cell system provided in the above-mentioned embodiment is implemented.

[0122] Furthermore, the fuel cell vehicle further comprises:

[0123] The communication interface 403 is used for communication between the memory 401 and the processor 402 .

[0124] The memory 401 is used to store computer programs that can be executed on the processor 402 .

[0125] The memory 401 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0126] If the memory 401, the processor 402 and the communication interface 403 are implemented independently, the communication interface 403, the memory 401 and the processor 402 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0127] Optionally, in a specific implementation, if the memory 401, the processor 402 and the communication interface 403 are integrated on a chip, the memory 401, the processor 402 and the communication interface 403 can communicate with each other through an internal interface.

[0128] The processor 402 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0129] This embodiment also provides a computer-readable storage medium, in which a computer program code is stored. When the computer program code is run on a computer, the computer executes the above-mentioned related method steps to implement the hydrogen leakage detection method for a fuel cell vehicle with a fuel cell system provided in the above embodiment.

[0130] Through the description of the above implementation methods, technical personnel in the relevant field can understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0131] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0132] The above contents are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for detecting hydrogen leakage in a fuel cell vehicle having a fuel cell system, characterized in that: The following steps are involved: Obtaining a first hydrogen pressure decay value of a first hydrogen supply pipeline and a first hydrogen monitoring concentration corresponding to the first hydrogen supply pipeline; If the first hydrogen pressure decay value is less than or equal to a first preset threshold, and the first hydrogen monitoring concentration is less than or equal to a second preset threshold, then after the hydrogen is delivered to the second hydrogen supply pipeline, a second hydrogen pressure decay value of the second hydrogen supply pipeline and a second hydrogen monitoring concentration corresponding to the second hydrogen supply pipeline are obtained; as well as If the second hydrogen pressure decay value is less than or equal to the third preset threshold, and the second hydrogen monitoring concentration is less than or equal to the fourth preset threshold, hydrogen is delivered to the third hydrogen supply pipeline, and when the third hydrogen supply pipeline does not meet the preset leakage condition, it is determined that there is no hydrogen leakage in the fuel cell system; otherwise, it is determined that there is a hydrogen leakage in the fuel cell system.

2. The method according to claim 1, characterized in that: After delivering hydrogen to the third hydrogen supply pipeline, the method further comprises: Obtaining the actual hydrogen pressure and the current hydrogen demand pressure of the third hydrogen supply pipeline; If the actual hydrogen pressure is equal to the current hydrogen demand pressure, stop delivering hydrogen to the third hydrogen supply pipeline, and obtain a third hydrogen pressure attenuation value of the third hydrogen supply pipeline and a third hydrogen monitoring concentration corresponding to the third hydrogen supply pipeline; If the third hydrogen pressure decay value is less than or equal to the fifth preset threshold, and the third hydrogen monitoring concentration is less than or equal to the sixth preset threshold, it is determined that the third hydrogen supply pipeline does not meet the preset leakage condition.

3. The method according to claim 2, characterized in that After obtaining the third hydrogen pressure decay value of the third hydrogen supply pipeline and the third hydrogen monitoring concentration corresponding to the third hydrogen supply pipeline, the method further includes: If the third hydrogen pressure decay value is greater than the fifth preset threshold, or the third hydrogen monitoring concentration is greater than the sixth preset threshold, it is determined that there is a hydrogen leak in the third hydrogen supply pipeline, and the hydrogen storage bottle and the first pressure reducing valve between the second hydrogen supply pipeline and the third hydrogen supply pipeline are closed.

4. The method according to claim 1, characterized in that After obtaining a first hydrogen pressure decay value of the first hydrogen supply pipeline and a first hydrogen monitoring concentration corresponding to the first hydrogen supply pipeline, the method further includes: If the first hydrogen pressure decay value is greater than the first preset threshold, or the first hydrogen monitoring concentration is greater than the second preset threshold, it is determined that there is a hydrogen leak in the first hydrogen supply pipeline and the hydrogen storage bottle is closed.

5. The method according to claim 1, characterized in that: After obtaining the second hydrogen pressure decay value of the second hydrogen supply pipeline and the second hydrogen monitoring concentration corresponding to the second hydrogen supply pipeline, the method further includes: If the second hydrogen pressure decay value is greater than the third preset threshold, or the second hydrogen monitoring concentration is greater than the fourth preset threshold, it is determined that there is a hydrogen leak in the second hydrogen supply pipeline, and the hydrogen storage bottle and the second pressure reducing valve between the first hydrogen supply pipeline and the second hydrogen supply pipeline are closed.

6. The method according to any one of claims 3 to 5, characterized in that: After closing the hydrogen storage bottle, the method further comprises: The vehicle is controlled to give an acoustic alarm and / or an optical alarm, and the fuel cell system or the fuel cell vehicle is prohibited from starting.

7. The method according to claim 1, characterized in that The hydrogen pressure of the first hydrogen supply pipeline is greater than the hydrogen pressure of the second hydrogen supply pipeline, and the hydrogen pressure of the second hydrogen supply pipeline is greater than the hydrogen pressure of the third hydrogen supply pipeline.

8. A hydrogen leak detection device for a fuel cell vehicle having a fuel cell system, characterized in that: include: An acquisition module, used to acquire a first hydrogen pressure decay value of a first hydrogen supply pipeline and a first hydrogen monitoring concentration corresponding to the first hydrogen supply pipeline; a first detection module, configured to obtain, after the hydrogen is delivered to the second hydrogen supply pipeline, a second hydrogen pressure decay value of the second hydrogen supply pipeline and a second hydrogen monitoring concentration corresponding to the second hydrogen supply pipeline if the first hydrogen pressure decay value is less than or equal to a first preset threshold value and the first hydrogen monitoring concentration is less than or equal to a second preset threshold value; as well as The second detection module is used to deliver hydrogen to the third hydrogen supply pipeline if the second hydrogen pressure decay value is less than or equal to a third preset threshold and the second hydrogen monitoring concentration is less than or equal to a fourth preset threshold, and to determine that there is no hydrogen leakage in the fuel cell system when the third hydrogen supply pipeline does not meet the preset leakage condition; otherwise, it is determined that there is a hydrogen leakage in the fuel cell system.

9. A fuel cell vehicle, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement a hydrogen leak detection method for a fuel cell vehicle having a fuel cell system as described in any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement a hydrogen leak detection method for a fuel cell vehicle having a fuel cell system according to any one of claims 1 to 7.

Images