Hydrogen safety monitoring method, device and storage medium for fuel cell electric vehicle

Abstract

The application discloses a hydrogen safety monitoring method and device for a fuel cell power generation vehicle and a storage medium. The method comprises the following steps: obtaining a current mode of the fuel cell power generation vehicle by analyzing state parameters of the fuel cell power generation vehicle, wherein the state parameters are used to represent parameters possessed by the fuel cell power generation vehicle in the current state; monitoring hydrogen concentrations at different positions of a power generation cabin of a hydrogen fuel cell of the fuel cell power generation vehicle to obtain hydrogen concentration values corresponding to the different positions; analyzing the hydrogen concentration values based on the current mode of the fuel cell power generation vehicle to determine a hydrogen leakage risk level of the hydrogen fuel cell; and performing safety control on the fuel cell power generation vehicle based on emergency treatment measures corresponding to the hydrogen leakage risk level. The application solves the technical problem of hydrogen safety accidents of the fuel cell power generation vehicle.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicle control, in particular to a hydrogen safety monitoring method, device and storage medium for fuel cell power generation vehicle. BACKGROUND

[0002] The fuel cell power generation vehicle is a new power generation vehicle scheme. Since the fuel cell can be used as a vehicle power system and a power generation system, the fuel cell has unique advantages as a power system of the power generation vehicle. In addition, the fuel cell has the characteristics of zero emission and low noise, so the fuel cell power generation vehicle is a promising power generation vehicle.

[0003] However, since the fuel cell uses hydrogen as fuel, the power generation vehicle also needs to be equipped with a hydrogen storage tank and a relatively complex air inlet and outlet pipeline and circuit design, which inevitably causes hydrogen safety accidents.

[0004] At present, there is no effective solution to the above problems. SUMMARY

[0005] The embodiments of the present application provide a hydrogen safety monitoring method, device and storage medium for fuel cell power generation vehicle to at least solve the technical problem of hydrogen safety accidents of the fuel cell power generation vehicle.

[0006] According to an aspect of the embodiments of the present application, a hydrogen safety monitoring method for fuel cell power generation vehicle is provided, comprising: obtaining a current mode of the fuel cell power generation vehicle by analyzing state parameters of the fuel cell power generation vehicle, wherein the state parameters are used to represent parameters possessed by the fuel cell power generation vehicle in the current state; monitoring hydrogen concentration values corresponding to different positions of a hydrogen fuel cell cabin of the fuel cell power generation vehicle by monitoring hydrogen concentration of the different positions; analyzing the hydrogen concentration values based on the current mode of the fuel cell power generation vehicle to determine a hydrogen leakage risk level of the hydrogen fuel cell; and performing safety control on the fuel cell power generation vehicle based on emergency treatment measures corresponding to the hydrogen leakage risk level.

[0007] Further, in response to the current mode being the parking mode, the hydrogen concentration value is analyzed based on the current mode of the fuel cell vehicle to determine a hydrogen leakage risk level of the hydrogen fuel cell, including: determining whether the hydrogen concentration value of the roof of the power cabin is less than a preset hydrogen alarm concentration; in response to the hydrogen concentration value of the roof of the power cabin being not less than the preset hydrogen alarm concentration, determining whether the hydrogen concentration value of the roof is less than a preset hydrogen cutoff concentration, wherein the preset hydrogen cutoff concentration is greater than the preset hydrogen alarm concentration; in response to the hydrogen concentration value of the roof being less than the preset hydrogen cutoff concentration, determining that the hydrogen leakage risk level of the hydrogen fuel cell is a first level in the parking mode; and in response to the hydrogen concentration value of the roof being not less than the preset hydrogen cutoff concentration, determining that the hydrogen leakage risk level of the hydrogen fuel cell is a second level in the parking mode, wherein the second level is higher than the first level.

[0008] Further, in response to the hydrogen concentration value of the roof of the power cabin being less than the preset hydrogen alarm concentration, the hydrogen concentration value of the roof of the power cabin is monitored based on a preset monitoring period.

[0009] Further, the fuel cell vehicle is controlled based on the emergency treatment measures corresponding to the hydrogen leakage risk level, including: in response to the hydrogen leakage risk level of the hydrogen fuel cell being the first level in the parking mode, uploading a risk alarm corresponding to the first level in the parking mode, and shortening the preset monitoring period; and in response to the hydrogen leakage risk level of the hydrogen fuel cell being the second level in the parking mode, uploading a risk alarm corresponding to the second level in the parking mode, and performing emergency treatment on the risk alarm.

[0010] Further, in response to the current mode being the parking mode, the hydrogen concentration value is analyzed based on the current mode of the fuel cell vehicle to determine a hydrogen leakage risk level of the hydrogen fuel cell, including: determining whether the hydrogen concentration value of the roof of the power cabin is less than a preset hydrogen alarm concentration; in response to the hydrogen concentration value of the roof of the power cabin being not less than the preset hydrogen alarm concentration, determining whether the hydrogen concentration value of the roof is less than a preset hydrogen cutoff concentration, wherein the preset hydrogen cutoff concentration is greater than the preset hydrogen alarm concentration; in response to the hydrogen concentration value of the roof being less than the preset hydrogen cutoff concentration, determining that the hydrogen leakage risk level of the hydrogen fuel cell is a first level in the parking mode; and in response to the hydrogen concentration value of the roof being not less than the preset hydrogen cutoff concentration, determining that the hydrogen leakage risk level of the hydrogen fuel cell is a second level in the parking mode, wherein the second level is higher than the first level.

[0011] Further, in response to the hydrogen concentration value at the hydrogen gas tank and the hydrogen concentration value at the pipeline being less than the preset hydrogen alarm concentration, and the hydrogen concentration value at the hydrogen fuel cell being greater than the preset hydrogen alarm concentration, the hydrogen leakage risk level of the hydrogen fuel cell is determined to be a preset risk level, wherein the preset risk level is lower than the first level in the driving mode.

[0012] Further, based on the emergency treatment measures corresponding to the hydrogen leakage risk level, the fuel cell power generation vehicle is controlled safely, including: in response to the hydrogen leakage risk level of the hydrogen fuel cell being the first level in the driving mode, determining the emergency treatment measures corresponding to the hydrogen leakage at the roof based on the first level in the driving mode; in response to the hydrogen leakage risk level of the hydrogen fuel cell being the second level in the driving mode, determining the emergency treatment measures corresponding to the hydrogen leakage at the hydrogen gas tank based on the second level in the driving mode; in response to the hydrogen leakage risk level of the hydrogen fuel cell being the third level in the driving mode, determining the emergency treatment measures corresponding to the hydrogen leakage at the pipeline based on the third level in the driving mode.

[0013] Further, in response to the current mode being the driving mode, the hydrogen concentration value is analyzed based on the current mode of the fuel cell power generation vehicle to determine the hydrogen leakage risk level of the hydrogen fuel cell, including: determining whether there is a hydrogen concentration value greater than the preset hydrogen alarm concentration among the hydrogen concentration value at the roof of the power generation cabin, the hydrogen concentration value at the hydrogen gas tank, and the hydrogen concentration value at the pipeline; in response to there being a hydrogen concentration value greater than the preset hydrogen alarm concentration among the hydrogen concentration value at the roof of the power generation cabin, the hydrogen concentration value at the hydrogen gas tank, and the hydrogen concentration value at the pipeline, the hydrogen leakage risk level of the hydrogen fuel cell is determined to be the first level in the driving mode; in response to there being no hydrogen concentration value greater than the preset hydrogen alarm concentration among the hydrogen concentration value at the roof of the power generation cabin, the hydrogen concentration value at the hydrogen gas tank, and the hydrogen concentration value at the pipeline, the hydrogen leakage risk level of the hydrogen fuel cell is determined to be a preset risk level, wherein the preset risk level is lower than the first level in the driving mode.

[0014] Further, based on the emergency treatment measures corresponding to the hydrogen leakage risk level, the fuel cell power generation vehicle is controlled safely, including: in response to the hydrogen leakage risk level of the hydrogen fuel cell being the first level in the driving mode, uploading the alarm information corresponding to the first level in the driving mode, and based on the alarm information, the fuel cell power generation vehicle is managed in an emergency.

[0015] Further, in response to the state parameters including a speed parameter, a parking brake parameter and a battery parameter of the fuel cell vehicle, the mode in which the fuel cell vehicle currently is by analyzing the state parameters of the fuel cell vehicle is obtained, including: in response to the speed parameter being greater than a preset driving speed, determining that the mode in which the fuel cell vehicle currently is is a driving mode; in response to the speed parameter not being greater than the preset driving speed, the parking brake parameter satisfying an open state, and the battery parameter satisfying a working state, determining that the mode in which the fuel cell vehicle currently is is a parking power generation mode; and in response to the speed parameter not being greater than the preset driving speed, the parking brake parameter satisfying the open state, and the battery parameter not satisfying the working state, determining that the mode in which the fuel cell vehicle currently is is a parking mode.

[0016] According to another aspect of the embodiments of the present application, a hydrogen safety monitoring device for a fuel cell vehicle is also provided, including: an analysis module, configured to obtain a mode in which the fuel cell vehicle currently is by analyzing state parameters of the fuel cell vehicle, wherein the state parameters are used to represent parameters possessed by the fuel cell vehicle in a current state; a monitoring module, configured to monitor hydrogen concentration at different positions of a power generation cabin of a hydrogen fuel cell of the fuel cell vehicle, and obtain hydrogen concentration values corresponding to the different positions; a determination module, configured to analyze the hydrogen concentration values based on the mode in which the fuel cell vehicle currently is, and determine a hydrogen leakage risk level of the hydrogen fuel cell; and a control module, configured to perform safety control on the fuel cell vehicle based on an emergency treatment measure corresponding to the hydrogen leakage risk level.

[0017] According to another aspect of the embodiments of the present application, an electronic device is also provided, including: a memory, storing an executable program; and a processor, configured to run the program, wherein the program performs the method in the embodiments of the present application when running.

[0018] According to another aspect of the embodiments of the present application, a computer readable storage medium is also provided, including a stored executable program, wherein the computer readable storage medium performs the method in the embodiments of the present application when the executable program runs.

[0019] According to another aspect of the embodiments of the present application, a computer program product is also provided, including a computer program, which implements the method in the embodiments of the present application when executed by a processor.

[0020] According to another aspect of the embodiments of the present application, a computer program product is also provided, including a non-volatile computer readable storage medium, which stores a computer program, and the computer program implements the method in the embodiments of the present application when executed by a processor.

[0021] According to another aspect of the embodiments of the present application, there is also provided a computer program which, when executed by a processor, implements the method in any of the embodiments of the present application.

[0022] In the embodiments of the present application, by analyzing the state parameters of the fuel cell power generation vehicle, the mode in which the fuel cell power generation vehicle currently locates is obtained, wherein the state parameters are used to represent the parameters possessed by the fuel cell power generation vehicle in the current state; the hydrogen concentration at different positions of the power cabin of the hydrogen fuel cell of the fuel cell power generation vehicle is monitored to obtain the hydrogen concentration values corresponding to the different positions; based on the mode in which the fuel cell power generation vehicle currently locates, the hydrogen concentration values are analyzed to determine the hydrogen leakage risk level of the hydrogen fuel cell; and based on the emergency treatment measures corresponding to the hydrogen leakage risk level, the fuel cell power generation vehicle is controlled safely. It is easy to note that by analyzing the hydrogen concentration values at different positions of the power cabin of the fuel cell power generation vehicle in different modes, the corresponding hydrogen leakage risk level can be obtained, and then the fuel cell power generation vehicle is controlled safely based on different hydrogen leakage risk levels, so as to achieve the purpose of timely and accurately detecting the hydrogen leakage risk of the current fuel cell power generation vehicle and taking the hydrogen leakage emergency treatment measures according to the driving mode of the vehicle at this time, thereby realizing the quick response to the hydrogen leakage risk, reducing the technical effect of hydrogen safety accidents, and further solving the technical problem of hydrogen safety accidents of the fuel cell power generation vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and serve to explain the principles of the application. In the drawings:

[0024] Figure 1 is a flow chart of a hydrogen safety monitoring method of a fuel cell power generation vehicle according to an embodiment of the present application;

[0025] Figure 2 is a schematic diagram of an optional hydrogen safety detection system of a hydrogen fuel cell power generation vehicle according to an embodiment of the present application;

[0026] Figure 3 is a flow chart of hydrogen leakage risk level identification and emergency treatment in a normal parking mode according to an embodiment of the present application;

[0027] Figure 4 is a flow chart of hydrogen leakage risk level identification and emergency treatment in a parking power generation mode according to an embodiment of the present application;

[0028] Figure 5 is a flow chart of hydrogen leakage risk level identification and emergency treatment in a normal driving mode according to an embodiment of the present application;

[0029] Figure 6 is a flow chart of an optional vehicle mode recognition according to an embodiment of the present application;

[0030] Figure 7 is a schematic diagram of a hydrogen safety monitoring device of a fuel cell power generation vehicle according to an embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to make the personnel in the technical field better understand the present application scheme, the technical scheme in the embodiment of the present application will be described clearly and completely in the following with reference to the drawings in the embodiment of the present application. Obviously, the described embodiment is only a part of the embodiment of the present application, not all. Based on the embodiment in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0032] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0033] Embodiment 1

[0034] According to the embodiment of the present application, an embodiment of a hydrogen safety monitoring method of a fuel cell power generation vehicle is provided. It should be noted that the steps shown in the flow chart of the drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flow chart, in some cases, the steps shown or described herein can be executed in an order different from that shown herein.

[0035] Figure 1 is a flow chart of a hydrogen safety monitoring method of a fuel cell power generation vehicle according to an embodiment of the present application, as shown in Figure 1 The method comprises the following steps:

[0036] In step S102, the current mode of the fuel cell power generation vehicle is obtained by analyzing the state parameters of the fuel cell power generation vehicle, wherein the state parameters are used to represent the parameters possessed by the fuel cell power generation vehicle in the current state;

[0037] Specifically, the fuel cell vehicle is a vehicle that generates electricity by using hydrogen and oxygen through a chemical reaction. The working principle is to use the reaction of hydrogen and oxygen in the fuel cell to generate electricity to drive the motor, thereby driving the vehicle.

[0038] The state parameter can be used to represent the parameters possessed by the fuel cell vehicle in the current state. Generally, the corresponding state parameters are different for different current states.

[0039] For example, if the current state of the fuel cell vehicle is the driving state, the corresponding state parameters can be speed, acceleration and other parameters; if the current state of the fuel cell vehicle is the non-driving state, the corresponding state parameters can be the brake state, the battery state, etc. The above state parameters are not limited specifically.

[0040] The mode in which the fuel cell vehicle is currently located is obtained based on the analysis of the state parameters.

[0041] For example, if the speed parameter is displayed in the state parameter and the speed parameter is not zero, the mode in which the fuel cell vehicle is currently located is the driving mode, etc.

[0042] In an optional embodiment, during the hydrogen safety monitoring of the fuel cell vehicle, the hydrogen safety can be monitored based on the mode in which the fuel cell vehicle is currently located, wherein the mode in which the fuel cell vehicle is currently located is obtained by analyzing the state parameters of the fuel cell vehicle.

[0043] In step S104, the hydrogen concentration of different positions of the power cabin of the hydrogen fuel cell of the fuel cell vehicle is monitored to obtain the hydrogen concentration values corresponding to the different positions;

[0044] Specifically, the hydrogen concentration value can be used to represent the hydrogen concentration value of the different positions of the power cabin monitored, and the hydrogen concentration value includes at least one of the following: the hydrogen concentration value of the power cabin roof, the concentration value at the hydrogen gas tank of the power cabin, and the hydrogen concentration value at the power cabin pipeline, etc.

[0045] In an optional embodiment, during the hydrogen concentration monitoring of different positions of the power cabin of the hydrogen fuel cell of the fuel cell vehicle, the hydrogen concentration of different positions of the power cabin can be monitored by a hydrogen concentration sensor group to obtain the hydrogen concentration values corresponding to the different positions. The hydrogen concentration sensor group is a sensor assembly for detecting hydrogen concentration, which is usually composed of sensors, signal processors and data displays, etc. It can monitor the hydrogen concentration in the environment in real time and process and display the detected data.

[0046] Step S106, based on the mode in which the fuel cell power generation vehicle is currently located, analyzing the hydrogen concentration values to determine the hydrogen leakage risk level of the hydrogen fuel cell;

[0047] Specifically, the hydrogen leakage risk level described above can be used to represent different levels of hydrogen leakage of the hydrogen fuel cell. Generally, it includes but is not limited to slight leakage, serious leakage, etc.

[0048] In an alternative embodiment, in the process of determining the hydrogen leakage risk level of the hydrogen fuel cell, the hydrogen concentration values corresponding to different positions can be analyzed based on the mode in which the fuel cell power generation vehicle is currently located, thereby determining the hydrogen leakage risk level.

[0049] For example, by analyzing the hydrogen concentration values corresponding to different positions of the power generation cabin of the hydrogen fuel cell in the parking mode, the risk level of hydrogen leakage of the hydrogen fuel cell in the parking mode can be obtained; by analyzing the hydrogen concentration values corresponding to different positions of the power generation cabin of the hydrogen fuel cell in the power generation mode, the risk level of hydrogen leakage of the hydrogen fuel cell in the power generation mode can be obtained; by analyzing the hydrogen concentration values corresponding to different positions of the power generation cabin of the hydrogen fuel cell in the driving mode, the risk level of hydrogen leakage of the hydrogen fuel cell in the driving mode can be obtained, etc.

[0050] Step S108, based on the emergency treatment measures corresponding to the hydrogen leakage risk level, performing safety control on the fuel cell power generation vehicle.

[0051] Specifically, after determining the hydrogen leakage risk level of the hydrogen fuel cell, the emergency treatment measures corresponding to the hydrogen leakage risk level can be determined, and the safety control on the fuel cell power generation vehicle can be performed based on the above emergency treatment measures.

[0052] For example, in the case that the fuel cell power generation vehicle is in the parking mode, the existing hydrogen leakage risk needs to be alarmed and uploaded, and the corresponding ventilation window is opened, etc.

[0053] In summary, by analyzing the state parameters of the fuel cell power generation vehicle, the current mode of the fuel cell power generation vehicle is obtained, wherein the state parameters are used to represent the parameters possessed by the fuel cell power generation vehicle in the current state; the hydrogen concentration of different positions of the hydrogen fuel cell power generation cabin of the fuel cell power generation vehicle is monitored to obtain the hydrogen concentration values corresponding to different positions; based on the current mode of the fuel cell power generation vehicle, the hydrogen concentration values are analyzed to determine the hydrogen leakage risk level of the hydrogen fuel cell; and based on the emergency treatment measures corresponding to the hydrogen leakage risk level, the fuel cell power generation vehicle is controlled safely. It is easy to note that by analyzing the hydrogen concentration values of different positions of the power generation cabin of the fuel cell power generation vehicle in different modes, the corresponding hydrogen leakage risk level can be obtained, and then the fuel cell power generation vehicle is controlled safely based on different hydrogen leakage risk levels, so as to timely and accurately detect the hydrogen leakage risk of the current fuel cell power generation vehicle and take hydrogen leakage emergency treatment measures according to the current vehicle driving mode, thereby realizing rapid response to the hydrogen leakage risk and reducing the technical effect of hydrogen safety accidents, and further solving the technical problem of hydrogen safety accidents of the fuel cell power generation vehicle.

[0054] In addition, Figure 2 is a schematic diagram of an optional hydrogen safety detection system of a hydrogen fuel cell power generation vehicle according to an embodiment of the present application. As Figure 2 indicated: the hydrogen safety detection system includes a vehicle state detector, a vehicle hydrogen safety detector, and an emergency danger treatment module.

[0055] The vehicle state detector can identify the current mode of the vehicle, specifically, by using vehicle state sensors such as a speed sensor, a parking brake state sensor, and a fuel cell state detector, the current speed information, whether in the parking brake state, and the fuel cell stack working state information are collected and analyzed, and the current mode of the vehicle is divided into the ordinary parking mode, the parking power generation mode, and the normal driving mode.

[0056] The vehicle hydrogen safety detector described above can identify the hydrogen leakage risk of the current vehicle, and the hydrogen concentration sensor group is composed of a power generation cabin roof hydrogen concentration sensor, a power generation cabin hydrogen tank side hydrogen concentration sensor, and a power generation cabin hydrogen gas path side hydrogen concentration sensor. The hydrogen concentration sensor information and the current mode of the vehicle are analyzed and processed, and the hydrogen leakage risk level of the vehicle in the current state is identified.

[0057] The emergency danger treatment module described above is used to perform emergency treatment on the hydrogen leakage after the risk level information is uploaded to the vehicle control unit, and the alarm information is uploaded to the remote control end.

[0058] Optionally, in response to the current mode being the parking mode, the hydrogen concentration value is analyzed based on the current mode of the fuel cell vehicle to determine the hydrogen leakage risk level of the hydrogen fuel cell, including: determining whether the hydrogen concentration value of the roof of the power cabin is less than a preset hydrogen alarm concentration; in response to the hydrogen concentration value of the roof of the power cabin being not less than the preset hydrogen alarm concentration, determining whether the hydrogen concentration value of the roof is less than a preset hydrogen cutoff concentration, wherein the preset hydrogen cutoff concentration is greater than the preset hydrogen alarm concentration; in response to the hydrogen concentration value of the roof being less than the preset hydrogen cutoff concentration, determining that the hydrogen leakage risk level of the hydrogen fuel cell is a first level in the parking mode; and in response to the hydrogen concentration value of the roof being not less than the preset hydrogen cutoff concentration, determining that the hydrogen leakage risk level of the hydrogen fuel cell is a second level in the parking mode, wherein the second level is higher than the first level.

[0059] Specifically, the above-mentioned preset hydrogen alarm concentration can be used to represent a preset hydrogen concentration value reaching an alarm level, and the preset hydrogen alarm concentration is not specifically limited here and can be adjusted according to actual conditions.

[0060] The above-mentioned preset hydrogen cutoff concentration can be used to represent a preset hydrogen concentration value reaching a cutoff level, and it should be noted that the preset hydrogen cutoff concentration is greater than the above-mentioned preset hydrogen alarm concentration, and the preset hydrogen cutoff concentration is not specifically limited here and can be adjusted according to actual conditions.

[0061] The above-mentioned first level in the parking mode can be used to represent that the hydrogen leakage risk level of the hydrogen fuel cell in the parking mode meets slight leakage.

[0062] The above-mentioned second level in the parking mode can be used to represent that the hydrogen leakage risk level of the hydrogen fuel cell in the parking mode meets serious leakage.

[0063] In an optional embodiment, if the current mode of the fuel cell vehicle is the parking mode, in the process of analyzing the hydrogen concentration value based on the parking mode to determine the hydrogen leakage risk level of the hydrogen fuel cell, it can be determined whether the hydrogen concentration value of the roof of the power cabin is less than a preset hydrogen alarm concentration. If it is not less than, it means that the current hydrogen concentration value of the roof of the power cabin has exceeded the hydrogen concentration value reaching the alarm level, and it needs to be further determined whether the hydrogen concentration value of the roof is less than a preset hydrogen cutoff concentration. If it is less than the preset hydrogen cutoff concentration, it means that the current hydrogen concentration value of the roof of the power cabin has not reached the hydrogen concentration value reaching the cutoff level, and it is determined that the hydrogen leakage risk level of the hydrogen fuel cell at this time is that the hydrogen fuel cell in the parking mode has slight leakage. Conversely, if it is not less than the preset hydrogen cutoff concentration, it means that the current hydrogen concentration value of the roof of the power cabin has exceeded the hydrogen concentration value reaching the cutoff level, and it is determined that the hydrogen leakage risk level of the hydrogen fuel cell at this time is that the hydrogen fuel cell in the parking mode has serious leakage.

[0064] Optionally, in response to the roof hydrogen concentration value of the power cabin being less than the preset hydrogen alarm concentration, the roof hydrogen concentration value of the power cabin is monitored based on a preset monitoring period.

[0065] Specifically, the preset monitoring period described above can be used to represent a preset period for monitoring hydrogen leakage, and the preset monitoring period is not specifically limited herein and can be adjusted according to actual conditions.

[0066] In the process of determining whether the roof hydrogen concentration value of the power cabin is less than the preset hydrogen alarm concentration, if the roof hydrogen concentration value of the power cabin is less than the preset hydrogen alarm concentration, it indicates that the current roof hydrogen concentration value of the power cabin has not reached the hydrogen concentration value of the alarm level, and then the roof hydrogen concentration value of the power cabin is continuously monitored based on the preset monitoring period.

[0067] Optionally, the fuel cell power generation vehicle is controlled based on the emergency treatment measures corresponding to the hydrogen leakage risk level, including: in response to the hydrogen leakage risk level of the hydrogen fuel cell being the first level in the parking mode, uploading the risk alarm corresponding to the first level in the parking mode, and shortening the preset monitoring period; and in response to the hydrogen leakage risk level of the hydrogen fuel cell being the second level in the parking mode, uploading the risk alarm corresponding to the second level in the parking mode, and performing emergency treatment on the risk alarm.

[0068] Specifically, in the process of controlling the fuel cell power generation vehicle based on the emergency treatment measures corresponding to the hydrogen leakage risk level, if the hydrogen leakage risk level of the hydrogen fuel cell is the first level in the parking mode, the corresponding emergency treatment measure can be uploading the risk alarm corresponding to the first level in the parking mode and shortening the preset monitoring period, that is, shortening the monitoring period of hydrogen leakage.

[0069] For example, in the case where the hydrogen leakage risk level of the hydrogen fuel cell is that the hydrogen fuel cell has slight leakage in the parking mode, the corresponding emergency treatment measure is: uploading the leakage risk alarm to the vehicle control unit and the remote monitoring end, opening the power cabin natural ventilation window, and shortening the preset monitoring period from t m1 to t m2 ; in the case where the hydrogen leakage risk level of the hydrogen fuel cell is that the hydrogen fuel cell has serious leakage in the parking mode, the corresponding emergency treatment measure is: uploading the leakage risk alarm to the vehicle control unit and the remote monitoring end, opening the power cabin exhaust system, and starting the emergency evacuation alarm.

[0070] Figure 3 is a flowchart of an optional hydrogen leakage risk level identification and emergency treatment in a general parking mode according to an embodiment of the present application. As shown in FIG. 8, the process includes the following steps:Figure 3 As shown, if the current mode of the fuel cell power generation vehicle is the normal parking mode, the hydrogen leakage safety detection time t monitor The initial value of the preset monitoring period (i.e., the above-mentioned preset monitoring period) is t m1 The detection time t monitor As the hydrogen leakage risk detection period, the hydrogen concentration at different positions of the hydrogen fuel cell power cabin is detected by the vehicle hydrogen safety detector, i.e., the above-mentioned hydrogen concentration sensor group, and the hydrogen leakage risk level is segmented and judged based on the detection value:

[0071] a. When the hydrogen concentration value C3 of the power cabin roof is less than or equal to the hydrogen alarm concentration C alarm , the detection time t monitor value does not change; when the hydrogen concentration value C3 of the power cabin roof is greater than the hydrogen alarm concentration C alarm , the judgment loop b is entered.

[0072] b. When the hydrogen concentration value C3 of the power cabin roof is less than or equal to the hydrogen cut-off concentration C shut down The hydrogen leakage risk level of the vehicle at this time is judged to be: the hydrogen is slightly leaked during the parking process of the vehicle. The corresponding emergency treatment measures in this mode are to upload the leakage risk warning to the vehicle control unit and the remote monitoring end, open the natural ventilation window of the power cabin, and shorten the safety detection time t monitor to t m2 ; when the hydrogen concentration value C3 of the power cabin roof is greater than the hydrogen cut-off concentration C shut down The hydrogen leakage risk level of the vehicle at this time is judged to be: the hydrogen is seriously leaked during the parking process of the vehicle. The corresponding emergency treatment measures in this mode are to upload the leakage risk warning to the vehicle control unit and the remote monitoring end, open the exhaust system of the power cabin, and start the emergency evacuation warning.

[0073] It should be noted that since the fuel cell stack is generally not started during normal parking, and considering the application scenario of long-term parking of the power generation vehicle, a certain initial sleep time can be set to reduce the energy consumption of the monitoring system. When the hydrogen concentration of the power cabin roof is greater than the alarm value, the sleep time is greatly shortened to improve the response speed of the hydrogen leakage monitoring. At the same time, considering that the hydrogen leakage during parking is generally caused by slight leakage of hydrogen gas due to aging and loosening of the hydrogen gas circuit, the hydrogen alarm concentration C alarm and the hydrogen cut-off concentration C shut down (hydrogen alarm concentration C alarm <hydrogen cut-off concentration C shut down)The hydrogen leakage risk is segmented, and when the hydrogen concentration is low, it can be handled by natural ventilation in emergency, and when it is high, it can be handled by the exhaust system. The top of the power cabin of the fuel cell power generation vehicle is generally a closed air leakage hydrogen accumulation place. By monitoring the hydrogen concentration at this location, the hydrogen leakage risk of the fuel cell power generation vehicle in the normal parking mode can be determined.

[0074] Optionally, in response to the current mode being the parking power generation mode, the hydrogen concentration value is analyzed based on the current mode of the fuel cell power generation vehicle to determine the hydrogen leakage risk level of the hydrogen fuel cell, including: in response to the hydrogen concentration value of the top of the power cabin being greater than the preset hydrogen alarm concentration, determining that the hydrogen leakage risk level of the hydrogen fuel cell is the first level in the parking power generation mode, wherein the first level is used to represent the risk level of hydrogen leakage at the top of the power cabin; in response to the hydrogen concentration value at the hydrogen tank of the power cabin being greater than the preset hydrogen alarm concentration, determining that the hydrogen leakage risk level of the hydrogen fuel cell is the second level in the parking power generation mode, wherein the second level is used to represent the risk level of hydrogen leakage at the hydrogen tank of the power cabin; in response to the hydrogen concentration value at the pipeline of the power cabin being greater than the preset hydrogen alarm concentration, determining that the hydrogen leakage risk level of the hydrogen fuel cell is the third level in the parking power generation mode, wherein the third level is used to represent the risk level of hydrogen leakage at the pipeline of the power cabin.

[0075] Specifically, if the current mode of the fuel cell power generation vehicle is the parking power generation mode, during the process of analyzing the hydrogen concentration value based on the parking power generation mode to determine the hydrogen leakage risk level of the hydrogen fuel cell, if the hydrogen concentration value at the top of the power cabin is greater than the preset hydrogen alarm concentration, it means that the current hydrogen concentration value at the top has exceeded the concentration that reaches the alarm level, and it is determined that the hydrogen leakage risk level of the hydrogen fuel cell in the parking power generation mode is that hydrogen leakage occurs at the top of the power cabin; if the hydrogen concentration value at the hydrogen tank of the power cabin is greater than the preset hydrogen alarm concentration, it means that the current hydrogen concentration value at the hydrogen tank has exceeded the concentration that reaches the alarm level, and it is determined that the hydrogen leakage risk level of the hydrogen fuel cell in the parking power generation mode is that hydrogen leakage occurs at the hydrogen tank of the power cabin; if the hydrogen concentration value at the pipeline of the power cabin is greater than the preset hydrogen alarm concentration, it means that the current hydrogen concentration value at the pipeline has exceeded the concentration that reaches the alarm level, and it is determined that the hydrogen leakage risk level of the hydrogen fuel cell in the parking power generation mode is that hydrogen leakage occurs at the pipeline of the power cabin.

[0076] Optionally, in response to the hydrogen concentration value at the top of the power cabin, the hydrogen concentration value at the hydrogen tank, and the hydrogen concentration value at the pipeline all being not greater than the preset hydrogen alarm concentration, the hydrogen leakage risk level of the hydrogen fuel cell is determined to be a preset risk level, wherein the preset risk level is lower than the first level in the parking power generation mode.

[0077] Specifically, the preset risk level can be used to represent a preset level lower than the level of hydrogen leakage. Generally, it can be the level of no hydrogen leakage or slight leakage without causing serious consequences. The preset risk level is not specifically limited here and can be adjusted according to actual conditions.

[0078] In an optional embodiment, if the hydrogen concentration value at the top of the power cabin, the hydrogen concentration value at the hydrogen tank, and the hydrogen concentration value at the pipeline are all less than the preset hydrogen alarm concentration, it indicates that the hydrogen concentration values at the top of the power cabin, the hydrogen tank, and the pipeline do not reach the alarm concentration. Correspondingly, the hydrogen leakage risk level of the hydrogen fuel cell is determined as the preset risk level, that is, there is no hydrogen leakage or slight leakage without causing serious consequences at the top of the power cabin, the hydrogen tank, and the pipeline.

[0079] Optionally, based on the emergency treatment measures corresponding to the hydrogen leakage risk level, the fuel cell power generation vehicle is controlled safely, including: in response to the hydrogen leakage risk level of the hydrogen fuel cell being the first level in the parked power generation mode, determining the emergency treatment measures corresponding to the hydrogen leakage at the top based on the first level in the parked power generation mode; in response to the hydrogen leakage risk level of the hydrogen fuel cell being the second level in the parked power generation mode, determining the emergency treatment measures corresponding to the hydrogen leakage at the hydrogen tank based on the second level in the parked power generation mode; in response to the hydrogen leakage risk level of the hydrogen fuel cell being the third level in the parked power generation mode, determining the emergency treatment measures corresponding to the hydrogen leakage at the pipeline based on the third level in the parked power generation mode.

[0080] Specifically, in the process of controlling the fuel cell power generation vehicle safely based on the emergency treatment measures corresponding to the hydrogen leakage risk level, if the hydrogen leakage risk level of the hydrogen fuel cell is the hydrogen leakage at the top of the power cabin in the parked power generation mode, the corresponding emergency treatment measure is the emergency treatment measure corresponding to the hydrogen leakage at the top; if the hydrogen leakage risk level of the hydrogen fuel cell is the hydrogen leakage at the hydrogen tank of the power cabin in the parked power generation mode, the corresponding emergency treatment measure is the emergency treatment measure corresponding to the hydrogen leakage at the hydrogen tank; if the hydrogen leakage risk level of the hydrogen fuel cell is the hydrogen leakage at the pipeline of the power cabin in the parked power generation mode, the corresponding emergency treatment measure is the emergency treatment measure corresponding to the hydrogen leakage at the pipeline.

[0081] For example, if the hydrogen leakage risk level of the hydrogen fuel cell is that hydrogen leaks from the roof of the power cabin in the parked power generation mode, the corresponding emergency treatment measures are: closing the power generation mode, uploading the leakage alarm information to the vehicle control unit and the remote monitoring end, starting the emergency evacuation alarm, opening the power cabin exhaust system, emergency cutting off the electrical load, closing the hydrogen tank valve, switching the cathode gas of the fuel cell to nitrogen and unloading the pipe pressure; if the hydrogen leakage risk level of the hydrogen fuel cell is that hydrogen leaks from the hydrogen tank of the power cabin in the parked power generation mode, the corresponding emergency treatment measures are: closing the power generation mode, uploading the leakage alarm information to the vehicle control unit and the remote monitoring end, emergency cutting off the electrical load, closing the hydrogen tank valve, switching the cathode gas of the fuel cell to nitrogen and unloading the pipe pressure; if the hydrogen leakage risk level of the hydrogen fuel cell is that hydrogen leaks from the pipe of the power cabin in the parked power generation mode, the corresponding emergency treatment measures are: closing the power generation mode, uploading the leakage alarm information to the vehicle control unit and the remote monitoring end, emergency cutting off the electrical load, closing the hydrogen tank valve, and unloading the pipe pressure.

[0082] Figure 4 is a flow chart of an optional hydrogen leakage risk level identification and emergency treatment in the parked power generation mode according to an embodiment of the present application. As shown in Figure 4 , if the current vehicle driving mode is the parked power generation mode, the hydrogen leakage safety detection time t monitor is set to 0, the hydrogen leakage risk is monitored in real time, and the hydrogen concentration at different positions of the hydrogen fuel cell power cabin is detected by the vehicle hydrogen safety detector, i.e., the hydrogen concentration sensor group, to obtain a detection value, and then the vehicle hydrogen leakage risk identification is started. The hydrogen concentration at the hydrogen tank, the pipe and the roof of the power cabin is detected by the hydrogen concentration sensor group, and the detection values are C1, C2 and C3 respectively. Then the hydrogen leakage risk level is judged by segmentation:

[0083] a. The hydrogen concentration value C3 of the roof of the power cabin is greater than the hydrogen alarm concentration C alarm , it is judged that the hydrogen leakage risk level of the vehicle at this time is that the hydrogen leaks seriously during the power generation process of the vehicle. The corresponding emergency treatment measures in this mode are: closing the power generation mode, uploading the leakage alarm information to the vehicle control unit and the remote monitoring end, starting the emergency evacuation alarm, opening the power cabin exhaust system, emergency cutting off the electrical load, closing the hydrogen tank valve, switching the cathode gas of the fuel cell to nitrogen and unloading the pipe pressure; the hydrogen concentration value c3 of the roof of the power cabin is less than or equal to the hydrogen alarm concentration C alarm , and the judgment loop b is entered.

[0084] b. The hydrogen concentration value C1 of the hydrogen tank of the power cabin is greater than the hydrogen alarm concentration C alarm, the hydrogen leakage risk level of the vehicle at this time is: hydrogen tank leakage during vehicle power generation process, and the corresponding emergency treatment measures in this mode are to close the power generation mode, upload the leakage alarm information to the vehicle control unit and the remote monitoring end, emergency cut off the electrical load, close the hydrogen tank valve, switch the cathode gas of the fuel cell to nitrogen, and unload the pipe pressure; the hydrogen concentration value C1 at the hydrogen tank of the power generation cabin is ≤ the hydrogen alarm concentration C alarm , and the judgment loop c is entered.

[0085] c. The hydrogen concentration value C2 at the fuel cell pipe of the power generation cabin is > the hydrogen alarm concentration C alarm , the hydrogen leakage risk level of the vehicle at this time is: hydrogen gas leakage in the hydrogen gas circuit of the vehicle during power generation process, and the corresponding emergency treatment measures in this mode are to close the power generation mode, upload the leakage alarm information to the vehicle control unit and the remote monitoring end, emergency cut off the electrical load, close the hydrogen tank valve, and unload the gas pipe pressure; the hydrogen concentration value C2 at the hydrogen tank of the power generation cabin is ≤ the hydrogen alarm concentration C alarm , and the parking power generation mode is maintained.

[0086] The possibility of hydrogen leakage risk in the parking power generation mode is greatly improved, and because the fuel cell is in a high load state in the power generation mode, the increase of output current may be accompanied by electrical risk, and hydrogen leakage may cause safety risk. Therefore, the monitoring accuracy of hydrogen leakage and the response speed of hydrogen leakage risk need to be improved in this mode. In the parking power generation mode, the hydrogen concentration at the roof where hydrogen mainly accumulates after the hydrogen leakage of the power generation cabin is still used as the first level leakage risk response, and considering the danger degree of hydrogen leakage is hydrogen tank leakage > hydrogen gas circuit leakage, the priority of hydrogen concentration detection beside the hydrogen tank will be higher than that beside the hydrogen gas circuit. The hydrogen concentration monitoring of the vehicle in the parking power generation mode will not set the sleep time and will be monitored in real time. At the same time, the hydrogen concentration value will no longer be segmented, and the hydrogen alarm concentration C alarm is used as the trigger concentration for hydrogen leakage emergency treatment.

[0087] Optionally, in response to the current mode being the driving mode, the hydrogen concentration value is analyzed based on the current mode of the fuel cell power generation vehicle to determine the hydrogen leakage risk level of the hydrogen fuel cell, including: determining whether there is a hydrogen concentration value greater than the preset hydrogen alarm concentration in the hydrogen concentration value of the power cabin roof, the hydrogen concentration value at the hydrogen tank, and the hydrogen concentration value at the pipeline; in response to the hydrogen concentration value of the power cabin roof, the hydrogen concentration value at the hydrogen tank, and the hydrogen concentration value at the pipeline, the hydrogen leakage risk level of the hydrogen fuel cell is determined to be the first level in the driving mode; in response to the hydrogen concentration value of the power cabin roof, the hydrogen concentration value at the hydrogen tank, and the hydrogen concentration value at the pipeline, the hydrogen leakage risk level of the hydrogen fuel cell is determined to be the preset risk level, wherein the preset risk level is lower than the first level in the driving mode.

[0088] Specifically, if the current mode of the fuel cell power generation vehicle is the driving mode, in the process of analyzing the hydrogen concentration value based on the driving mode to determine the hydrogen leakage risk level of the hydrogen fuel cell, it can be determined whether there is a hydrogen concentration value greater than the preset hydrogen alarm concentration in the hydrogen concentration value of the power cabin roof, the hydrogen concentration value at the hydrogen tank, and the hydrogen concentration value at the pipeline. If there is a hydrogen concentration value greater than the preset hydrogen alarm concentration in the three, it is determined that the fuel cell power generation vehicle has hydrogen leakage in the driving mode; otherwise, if there is no hydrogen concentration value greater than the preset hydrogen alarm concentration in the three, it is determined that the fuel cell power generation vehicle has no hydrogen leakage in the driving mode.

[0089] Optionally, based on the emergency treatment measures corresponding to the hydrogen leakage risk level, the fuel cell power generation vehicle is controlled safely, including: in response to the hydrogen leakage risk level of the hydrogen fuel cell being the first level in the driving mode, uploading the alarm information corresponding to the first level in the driving mode, and based on the alarm information, the fuel cell power generation vehicle is managed in an emergency.

[0090] Specifically, in the process of controlling the fuel cell power generation vehicle based on the emergency treatment measures corresponding to the hydrogen leakage risk level, if the hydrogen leakage risk level of the hydrogen fuel cell is the driving mode with hydrogen leakage, the corresponding emergency treatment measure is to upload the alarm information of the hydrogen leakage, and based on the alarm information, the fuel cell power generation vehicle is managed in an emergency.

[0091] For example, if the hydrogen leakage risk level of the hydrogen fuel cell is that there is hydrogen leakage in the driving mode, the corresponding emergency treatment measures are to upload the alarm information to the vehicle control unit and the remote monitoring end, open the power cabin exhaust system, warn the driver to make an emergency stop, and start the emergency evacuation alarm; otherwise, if the hydrogen concentration values at the power cabin roof, hydrogen tank, and hydrogen gas path are all less than the hydrogen alarm concentration, the vehicle is guaranteed to drive normally.

[0092] Figure 5 is a flow chart of an optional hydrogen leakage risk level identification and emergency treatment in the normal driving mode according to an embodiment of the present application. As shown in Figure 5 , if the current vehicle driving mode is the normal driving mode, the hydrogen leakage safety detection time t function is set as the initial value t f1 , and the hydrogen safety detector, i.e., the hydrogen concentration sensor group, detects the hydrogen concentration at different positions of the hydrogen fuel cell power cabin. If t m1 ≥ t f1 , the vehicle hydrogen leakage risk identification is started, the hydrogen concentration sensor group detects the hydrogen concentrations at the hydrogen tank, the pipeline path, and the power cabin roof as C1, C2, and C3 respectively, and the hydrogen leakage risk level is judged.

[0093] If there is a concentration greater than the hydrogen alarm concentration C alarm among the hydrogen concentration values C3, C1, and C2 at the power cabin roof, the hydrogen tank, and the hydrogen gas path, it is judged that the hydrogen leakage risk level of the vehicle at this time is that the hydrogen leaks during the vehicle operation, and the corresponding emergency treatment measures in this mode are to upload the alarm information to the vehicle control unit and the remote monitoring end, start the power cabin exhaust system, warn the driver to make an emergency stop, and start the emergency evacuation alarm; if the hydrogen concentration values C3, C1, and C2 at the power cabin roof, the hydrogen tank, and the hydrogen gas path are all less than or equal to the hydrogen alarm concentration C alarm , the vehicle is kept in the normal driving mode.

[0094] In the normal driving state, the fuel cell stack is not started to generate electricity, and a certain initial sleep time can be set to reduce the energy consumption of the monitoring system. However, considering the uncertainty of the vehicle driving conditions and the environment, hydrogen leakage during vehicle driving will be a very dangerous situation, and the sleep time t f1 of the hydrogen safety detector needs to be less than the sleep time t m1 in the normal parking state. At the same time, the hydrogen concentration value will no longer be processed in sections, and the hydrogen alarm concentration C alarm is taken as the trigger concentration for hydrogen leakage emergency treatment. If the hydrogen concentration detection value of any one of the three sensors is greater than the alarm value C alarmThis is considered a dangerous leak situation, requiring emergency shutdown and emergency leak risk management.

[0095] Optionally, in response to state parameters including the speed parameters, parking brake parameters, and battery parameters of the fuel cell generator vehicle, the current mode of the fuel cell generator vehicle is determined by analyzing the state parameters of the fuel cell generator vehicle, including: in response to the speed parameter being greater than a preset driving speed, determining that the current mode of the fuel cell generator vehicle is driving mode; in response to the speed parameter not being greater than the preset driving speed, and the parking brake parameter being in the open state, and the battery parameter being in the working state, determining that the current mode of the fuel cell generator vehicle is parking generator mode; in response to the speed parameter not being greater than the preset driving speed, and the parking brake parameter being in the open state, and the battery parameter not being in the working state, determining that the current mode of the fuel cell generator vehicle is parking mode.

[0096] Specifically, the aforementioned preset driving speed can be used to represent the preset driving speed of the fuel cell generator vehicle. For example, it can be 0 or 0.5, etc. There is no specific limitation on the preset driving speed here, and it can be adjusted according to the actual situation.

[0097] In one optional embodiment, during the process of analyzing the state parameters of the fuel cell generator vehicle to determine its current mode, if the speed parameter of the fuel cell generator vehicle is greater than a preset driving speed, it indicates that the fuel cell generator vehicle has moved, and the current mode of the fuel cell generator vehicle is determined to be driving mode; if the speed parameter is not greater than the preset driving speed, and the parking brake parameter meets the open state, and the battery parameter meets the working state, it indicates that the fuel cell generator vehicle has not moved, and the battery is working, and the current mode of the fuel cell generator vehicle is determined to be parking power generation mode; if the speed parameter is not greater than the preset driving speed, and the parking brake parameter meets the open state, and the battery parameter does not meet the working state, it indicates that the fuel cell generator vehicle has not moved, and the battery is not working, and the current mode of the fuel cell generator vehicle is determined to be parking mode.

[0098] Figure 6 This is a flowchart of an optional vehicle pattern recognition method according to an embodiment of the present invention. For example... Figure 6 As shown, the vehicle status detector is set with a sleep time t. hibemate initial value t s1 and with sleep time t hibemate This serves as the vehicle driving mode detection cycle. The timer detection time t is greater than or equal to the sleep time t. hibemate In this case, vehicle driving mode recognition is activated, and the vehicle driving mode is classified through segmented logic using vehicle speed sensor, parking brake status sensor, and fuel cell stack status detector:

[0099] a. If the vehicle speed sensor detects that the vehicle is running at a speed v > 0, it is determined that the vehicle driving mode is normal driving mode; if the running speed v = 0, it enters the judgment loop b.

[0100] b. If the parking brake state sensor determines that the vehicle parking brake is in the closed state, it is determined that the vehicle driving mode is still normal driving mode; if the parking brake state sensor determines that the vehicle parking brake is in the open state, it enters the judgment loop c.

[0101] c. If the fuel cell stack state detector detects that the battery is in working state, it is determined that the vehicle driving mode is parking power generation mode; if it is detected that the battery is not working, it is determined that the vehicle driving mode is parking power generation mode.

[0102] It should be noted that the power generation occasion of the hydrogen fuel cell power generation vehicle suitable for the present application is only used to meet the temporary power needs in fixed scenarios, such as temporary power needs in road construction, temporary power needs in post-disaster rescue, etc. Mobile power supply scenarios are not considered, so the fuel cell stack only works in parking mode, and the sequence of fuel cell state detection is after the parking brake state detection.

[0103] Considering the problem that the parking brake usage habits of drivers are different, in order to distinguish between idling parking and parking power generation mode when the vehicle speed is 0, the parking brake state sensor detects the position of the vehicle parking brake, thereby judging whether the vehicle enters the parking brake state, and at the same time, the engine speed information can be used as a consideration for whether the vehicle is in idle state.

[0104] In summary, according to the classification of hydrogen leakage risk level according to the vehicle running mode, the risk degree of hydrogen leakage in different driving modes is evaluated, and a hydrogen leakage risk level classification method in different driving modes is proposed to improve the hydrogen leakage risk identification ability of hydrogen fuel cell power generation vehicles.

[0105] At the same time, according to the vehicle running mode setting, corresponding hydrogen leakage emergency treatment measures are set, and the risk degree of different degrees of hydrogen leakage in a specific vehicle driving mode is considered comprehensively, and corresponding hydrogen leakage emergency treatment measures are set. Improve the hydrogen leakage emergency treatment ability of hydrogen fuel cell power generation vehicles.

[0106] In addition, for the hydrogen leakage risk possibility in different driving modes, a dynamic detection cycle is set: in the low risk possibility state, a long detection cycle is adopted, which can reduce energy consumption and increase the endurance of the hydrogen safety system, and in the high risk possibility state, the detection cycle is shortened, which improves the risk identification accuracy and response speed of risk identification.

[0107] Example 2

[0108] According to the embodiment of the present application, a hydrogen safety monitoring device for a fuel cell power generation vehicle is provided, which can perform the hydrogen safety monitoring method for a fuel cell power generation vehicle provided in the above-mentioned embodiment 1, and the specific implementation and preferred application scenarios are the same as those of the above-mentioned embodiment 1, which will not be repeated here.

[0109] Figure 7 is a schematic diagram of a remaining charging time display accuracy evaluation device according to an embodiment of the present application, as shown in the figure, the device comprises: Figure 7

[0110] The analysis module 702 is configured to obtain the mode in which the fuel cell power generation vehicle currently stays by analyzing the state parameters of the fuel cell power generation vehicle, wherein the state parameters are used to represent the parameters possessed by the fuel cell power generation vehicle in the current state.

[0111] The monitoring module 704 is configured to monitor the hydrogen concentration at different positions of the power cabin of the hydrogen fuel cell of the fuel cell power generation vehicle to obtain the hydrogen concentration values corresponding to the different positions.

[0112] The determination module 706 is configured to analyze the hydrogen concentration values based on the mode in which the fuel cell power generation vehicle currently stays to determine the hydrogen leakage risk level of the hydrogen fuel cell.

[0113] The control module 708 is configured to perform safety control on the fuel cell power generation vehicle based on the emergency treatment measures corresponding to the hydrogen leakage risk level.

[0114] Optionally, the determination module 706 comprises: a first judgment module configured to judge whether the hydrogen concentration value at the roof of the power cabin is less than a preset hydrogen alarm concentration; a second judgment module configured to, in response to the hydrogen concentration value at the roof of the power cabin being not less than the preset hydrogen alarm concentration, judge whether the hydrogen concentration value at the roof is less than a preset hydrogen cutoff concentration, wherein the preset hydrogen cutoff concentration is greater than the preset hydrogen alarm concentration; a first determination module configured to, in response to the hydrogen concentration value at the roof being less than the preset hydrogen cutoff concentration, determine that the hydrogen leakage risk level of the hydrogen fuel cell is a first level in the parking mode; and a second determination module configured to, in response to the hydrogen concentration value at the roof being not less than the preset hydrogen cutoff concentration, determine that the hydrogen leakage risk level of the hydrogen fuel cell is a second level in the parking mode, wherein the second level is higher than the first level.

[0115] Optionally, the first judgment module comprises a monitoring module configured to, in response to the hydrogen concentration value at the roof of the power cabin being less than the preset hydrogen alarm concentration, monitor the hydrogen concentration value at the roof of the power cabin based on a preset monitoring period.

[0116] ​Optionally, the control module 708 comprises: a shortening module, configured to shorten a preset monitoring period in response to the hydrogen leakage risk level of the hydrogen fuel cell being the first level in the parking mode; and an emergency module, configured to perform emergency processing on a risk warning corresponding to the second level in the parking mode in response to the hydrogen leakage risk level of the hydrogen fuel cell being the second level in the parking mode.

[0117] Optionally, the determination module 706 comprises: a third determination module, configured to determine that the hydrogen leakage risk level of the hydrogen fuel cell is a first level in the parking power generation mode in response to the hydrogen concentration value of the power generation cabin roof being greater than a preset hydrogen warning concentration; a fourth determination module, configured to determine that the hydrogen leakage risk level of the hydrogen fuel cell is a second level in the parking power generation mode in response to the hydrogen concentration value at the hydrogen gas tank of the power generation cabin being greater than the preset hydrogen warning concentration; and a fifth determination module, configured to determine that the hydrogen leakage risk level of the hydrogen fuel cell is a third level in the parking power generation mode in response to the hydrogen concentration value at the pipeline of the power generation cabin being greater than the preset hydrogen warning concentration.

[0118] Optionally, the device further comprises a sixth determination module, configured to determine that the hydrogen leakage risk level of the hydrogen fuel cell is a preset risk level in response to the hydrogen concentration value of the power generation cabin roof, the hydrogen concentration value at the hydrogen gas tank, and the hydrogen concentration value at the pipeline all being not greater than the preset hydrogen warning concentration, wherein the preset risk level is lower than the first level in the parking power generation mode.

[0119] Optionally, the control module 708 comprises: a first emergency processing module, configured to determine an emergency processing measure corresponding to the hydrogen leakage of the roof based on the first level in the parking power generation mode in response to the hydrogen leakage risk level of the hydrogen fuel cell being the first level in the parking power generation mode; a second emergency processing module, configured to determine an emergency processing measure corresponding to the hydrogen leakage at the hydrogen gas tank based on the second level in the parking power generation mode in response to the hydrogen leakage risk level of the hydrogen fuel cell being the second level in the parking power generation mode; and a third emergency processing module, configured to determine an emergency processing measure corresponding to the hydrogen leakage at the pipeline based on the third level in the parking power generation mode in response to the hydrogen leakage risk level of the hydrogen fuel cell being the third level in the parking power generation mode.

[0120] Optionally, the determining module 706 comprises: a third determining module, configured to determine whether there is a hydrogen concentration value greater than the preset hydrogen alarm concentration in the hydrogen concentration value of the hydrogen fuel cell cabin roof, the hydrogen concentration value at the hydrogen tank, and the hydrogen concentration value at the pipeline; a seventh determining module, configured to determine that the hydrogen leakage risk level of the hydrogen fuel cell is the first level in the driving mode in response to the hydrogen concentration value of the hydrogen fuel cell cabin roof, the hydrogen concentration value at the hydrogen tank, and the hydrogen concentration value at the pipeline having a hydrogen concentration value greater than the preset hydrogen alarm concentration; and an eighth determining module, configured to determine that the hydrogen leakage risk level of the hydrogen fuel cell is a preset risk level in response to the hydrogen concentration value of the hydrogen fuel cell cabin roof, the hydrogen concentration value at the hydrogen tank, and the hydrogen concentration value at the pipeline not having a hydrogen concentration value greater than the preset hydrogen alarm concentration, wherein the preset risk level is lower than the first level in the driving mode.

[0121] Optionally, the control module 708 comprises: an uploading module, configured to upload the alarm information corresponding to the first level in the driving mode in response to the hydrogen leakage risk level of the hydrogen fuel cell being the first level in the driving mode, and perform emergency management on the fuel cell power generation vehicle based on the alarm information.

[0122] Optionally, the analysis module 702 comprises: a driving mode determining module, configured to determine that the fuel cell power generation vehicle is currently in the driving mode in response to the speed parameter being greater than the preset driving speed; a parking power generation mode determining module, configured to determine that the fuel cell power generation vehicle is currently in the parking power generation mode in response to the speed parameter not being greater than the preset driving speed, the parking brake parameter satisfying the open state, and the battery parameter satisfying the working state; and a parking mode determining module, configured to determine that the fuel cell power generation vehicle is currently in the parking mode in response to the speed parameter not being greater than the preset driving speed, the parking brake parameter satisfying the open state, and the battery parameter not satisfying the working state.

[0123] Embodiment 3

[0124] The embodiments of the present application also provide an electronic device, comprising: a memory, which stores an executable program; and a processor, which is configured to run the program, wherein the program performs the method in the embodiments of the present application when running.

[0125] Embodiment 4

[0126] The embodiments of the present application also provide a computer readable storage medium, which comprises a stored executable program, wherein the computer readable storage medium controls the device where the computer readable storage medium is located to perform the method in the embodiments of the present application when the executable program runs.

[0127] Embodiment 5

[0128] The embodiment of the present application further provides a computer program product comprising a computer program, which, when executed by a processor, implements the method in each embodiment of the present application.

[0129] Embodiment 6

[0130] The embodiment of the present application further provides a computer program product comprising a non-volatile computer readable storage medium for storing a computer program, which, when executed by a processor, implements the method in each embodiment of the present application.

[0131] Embodiment 7

[0132] The embodiment of the present application further provides a computer program, which, when executed by a processor, implements the method in each embodiment of the present application.

[0133] The above-mentioned serial numbers of the embodiments of the present application are only for description, and do not represent the advantages or disadvantages of the embodiments.

[0134] In the above-mentioned embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0135] In several embodiments provided in the present application, it should be understood that the disclosed technical contents can be implemented by other manners. Among them, the above-mentioned device embodiments are only schematic, for example, the division of the units can be a logical function division, and in actual implementation, there can be another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or modules shown or discussed can be indirect coupling or communication connection through some interfaces, units or modules, which can be electrical or other forms.

[0136] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed to multiple units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0137] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be realized in the form of hardware or in the form of software functional unit.

[0138] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application, essentially or in other words, the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a number of instructions to make a computer device (which can be a personal computer, a server or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present application. The aforementioned storage medium includes: a U disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0139] The above is only the preferred embodiment of the present application, and it should be pointed out that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A hydrogen safety monitoring method for a fuel cell electric power generation vehicle, characterized by, The method comprises the following steps: obtaining the current mode of the fuel cell vehicle by analyzing the state parameters of the fuel cell vehicle, wherein the state parameters are used to represent the parameters possessed by the fuel cell vehicle in the current state, and the current mode of the fuel cell vehicle includes a parking mode, a parking power generation mode and a driving mode; monitoring the hydrogen concentration values of different positions of the hydrogen fuel cell cabin of the fuel cell vehicle, wherein the hydrogen concentration values include at least one of the following: the hydrogen concentration value of the cabin roof, the hydrogen concentration value of the hydrogen gas tank of the cabin and the hydrogen concentration value of the pipeline of the cabin; analyzing the hydrogen concentration values based on the current mode of the fuel cell vehicle to determine the hydrogen leakage risk level of the hydrogen fuel cell; performing safety control on the fuel cell vehicle based on the emergency treatment measures corresponding to the hydrogen leakage risk level; wherein the analysis of the hydrogen concentration values based on the current mode of the fuel cell vehicle to determine the hydrogen leakage risk level of the hydrogen fuel cell comprises: in the parking mode, analyzing the hydrogen concentration value of the cabin roof, the hydrogen concentration value of the hydrogen gas tank of the cabin and the hydrogen concentration value of the pipeline of the cabin to obtain the hydrogen leakage risk level in the parking mode; in the parking power generation mode, analyzing the hydrogen concentration value of the cabin roof, the hydrogen concentration value of the hydrogen gas tank of the cabin and the hydrogen concentration value of the pipeline of the cabin to obtain the hydrogen leakage risk level in the parking power generation mode; in the driving mode, analyzing the hydrogen concentration value of the cabin roof, the hydrogen concentration value of the hydrogen gas tank of the cabin and the hydrogen concentration value of the pipeline of the cabin to obtain the hydrogen leakage risk level in the driving mode. The safety control of the fuel cell power generation vehicle based on the emergency treatment measures corresponding to the hydrogen leakage risk level includes: in response to the hydrogen leakage risk level of the hydrogen fuel cell being the first level in the parking mode, shortening a preset monitoring period; in response to the hydrogen leakage risk level being the first level in the parking power generation mode, determining the emergency treatment measures corresponding to the hydrogen leakage of the power generation cabin roof in the parking power generation mode based on the first level in the parking power generation mode, which are: closing the parking power generation mode, uploading leakage alarm information to a vehicle control unit and a remote monitoring end, starting an emergency evacuation alarm, opening a power generation cabin exhaust system, cutting off an emergency power load, closing a hydrogen gas tank valve, switching the cathode gas of the fuel cell to nitrogen, and unloading the pipeline pressure; in response to the hydrogen leakage risk level being the second level in the parking power generation mode, determining the emergency treatment measures corresponding to the hydrogen leakage of the power generation cabin hydrogen gas tank based on the second level in the parking power generation mode, which are: closing the parking power generation mode, uploading the leakage alarm information to the vehicle control unit and the remote monitoring end, cutting off the emergency power load, closing the hydrogen gas tank valve, switching the cathode gas of the fuel cell to nitrogen, and unloading the pipeline pressure; in response to the hydrogen leakage risk level being the third level in the parking power generation mode, determining the emergency treatment measures corresponding to the hydrogen leakage of the power generation cabin pipeline based on the third level in the parking power generation mode, which are: closing the parking power generation mode, uploading the leakage alarm information to the vehicle control unit and the remote monitoring end, cutting off the emergency power load, closing the hydrogen gas tank valve, and unloading the pipeline pressure. In response to the state parameters including a speed parameter, a parking brake parameter and a battery parameter of the fuel cell power generation vehicle, and the timer detection time being greater than or equal to the sleep time set by the vehicle state detector, the current mode of the fuel cell power generation vehicle is obtained by analyzing the state parameters of the fuel cell power generation vehicle, including: in response to the speed parameter being greater than a preset driving speed, determining that the current mode of the fuel cell power generation vehicle is the driving mode; in response to the speed parameter not being greater than the preset driving speed, the parking brake parameter satisfying the open state, and the battery parameter satisfying the working state, determining that the current mode of the fuel cell power generation vehicle is the parking power generation mode; in response to the speed parameter not being greater than the preset driving speed, the parking brake parameter satisfying the open state, and the battery parameter not satisfying the working state, determining that the current mode of the fuel cell power generation vehicle is the parking mode.

2. The hydrogen safety monitoring method for a fuel cell power generation vehicle according to claim 1, characterized by, In response to the current mode being the parking mode, the hydrogen concentration value is analyzed based on the current mode of the fuel cell power generation vehicle to determine the hydrogen leakage risk level of the hydrogen fuel cell, including: determining whether the roof hydrogen concentration value of the power generation cabin is less than a preset hydrogen alarm concentration; in response to the roof hydrogen concentration value of the power cabin being not less than a preset hydrogen alarm concentration, determining whether the roof hydrogen concentration value is less than a preset hydrogen cut-off concentration, wherein the preset hydrogen cut-off concentration is greater than the preset hydrogen alarm concentration; in response to the roof hydrogen concentration value being less than the preset hydrogen cut-off concentration, determining that the hydrogen leakage risk level of the hydrogen fuel cell is a first level in the parking mode; in response to the roof hydrogen concentration value being not less than the preset hydrogen cut-off concentration, determining that the hydrogen leakage risk level of the hydrogen fuel cell is a second level in the parking mode, wherein the second level in the parking mode is higher than the first level in the parking mode.

3. The hydrogen safety monitoring method for a fuel cell power generation vehicle according to claim 2, characterized by, in response to the roof hydrogen concentration value of the power cabin being less than a preset hydrogen alarm concentration, monitoring the roof hydrogen concentration value of the power cabin based on a preset monitoring period.

4. The hydrogen safety monitoring method for a fuel cell power generation vehicle according to claim 2, characterized by, based on the emergency treatment measures corresponding to the hydrogen leakage risk level, performing safety control on the fuel cell electric vehicle, including: in response to the hydrogen leakage risk level of the hydrogen fuel cell being the first level in the parking mode, uploading a risk alarm corresponding to the first level in the parking mode; in response to the hydrogen leakage risk level of the hydrogen fuel cell being the second level in the parking mode, uploading a risk alarm corresponding to the second level in the parking mode and performing emergency treatment on the risk alarm.

5. The hydrogen safety monitoring method for a fuel cell power plant vehicle according to claim 1, characterized by, in response to the current mode being the parking power generation mode, based on the current mode of the fuel cell electric vehicle, analyzing the hydrogen concentration value to determine the hydrogen leakage risk level of the hydrogen fuel cell, including: in response to the roof hydrogen concentration value of the power cabin being greater than a preset hydrogen alarm concentration, determining that the hydrogen leakage risk level of the hydrogen fuel cell is a first level in the parking power generation mode, wherein the first level in the parking power generation mode is used to represent the risk level of hydrogen leakage occurring at the roof of the power cabin; in response to the hydrogen concentration value at the hydrogen tank of the power cabin being greater than the preset hydrogen alarm concentration, determining that the hydrogen leakage risk level of the hydrogen fuel cell is a second level in the parking power generation mode, wherein the second level in the parking power generation mode is used to represent the risk level of hydrogen leakage occurring at the hydrogen tank of the power cabin; in response to the hydrogen concentration value at the pipeline of the power cabin being greater than the preset hydrogen alarm concentration, determining that the hydrogen leakage risk level of the hydrogen fuel cell is a third level in the parking power generation mode, wherein the third level in the parking power generation mode is used to represent the risk level of hydrogen leakage occurring at the pipeline of the power cabin.

6. The hydrogen gas safety monitoring method for a fuel cell power generation vehicle according to claim 5, characterized by, in response to the roof hydrogen concentration value of the power cabin, the hydrogen concentration value at the hydrogen tank and the hydrogen concentration value at the pipeline all being not greater than the preset hydrogen alarm concentration, determining that the hydrogen leakage risk level of the hydrogen fuel cell is a preset risk level, wherein the preset risk level is lower than the first level in the parking power generation mode.

7. The hydrogen safety monitoring method for a fuel cell power plant vehicle according to claim 1, characterized by, In response to the current mode being the driving mode, the hydrogen concentration value is analyzed based on the mode in which the fuel cell power generation vehicle is currently located, and the hydrogen leakage risk level of the hydrogen fuel cell is determined, including: determining whether there is a hydrogen concentration value greater than a preset hydrogen alarm concentration in the hydrogen concentration value of the power generation cabin roof, the hydrogen concentration value at the hydrogen tank, and the hydrogen concentration value at the pipeline; in response to the hydrogen concentration value of the power generation cabin roof, the hydrogen concentration value at the hydrogen tank, and the hydrogen concentration value at the pipeline, the hydrogen leakage risk level of the hydrogen fuel cell is determined to be the first level in the driving mode; in response to the hydrogen concentration value of the power generation cabin roof, the hydrogen concentration value at the hydrogen tank, and the hydrogen concentration value at the pipeline, the hydrogen leakage risk level of the hydrogen fuel cell is determined to be the first level in the driving mode.

8. The hydrogen gas safety monitoring method for a fuel cell power generation vehicle according to claim 7, characterized by, based on the emergency treatment measures corresponding to the hydrogen leakage risk level, the fuel cell power generation vehicle is safely controlled, including: in response to the hydrogen leakage risk level of the hydrogen fuel cell being the first level in the driving mode, uploading the alarm information corresponding to the first level in the driving mode, and based on the alarm information, the fuel cell power generation vehicle is managed in an emergency.

9. A hydrogen safety monitoring device for a fuel cell power generation vehicle, characterized in that, including: an analysis module for obtaining the mode in which the fuel cell power generation vehicle is currently located by analyzing the state parameters of the fuel cell power generation vehicle, wherein the state parameters are used to represent the parameters possessed by the fuel cell power generation vehicle in the current state, and the mode in which the fuel cell power generation vehicle is currently located includes a parking mode, a parking power generation mode, and a driving mode; a monitoring module for monitoring the hydrogen concentration of different positions of the power generation cabin of the hydrogen fuel cell of the fuel cell power generation vehicle to obtain the hydrogen concentration values corresponding to the different positions, wherein the hydrogen concentration values include at least one of the following: the hydrogen concentration value of the power generation cabin roof, the hydrogen concentration value at the hydrogen tank of the power generation cabin, and the hydrogen concentration value at the pipeline of the power generation cabin; a determination module for analyzing the hydrogen concentration value based on the mode in which the fuel cell power generation vehicle is currently located, and determining the hydrogen leakage risk level of the hydrogen fuel cell; a control module for safely controlling the fuel cell power generation vehicle based on the emergency treatment measures corresponding to the hydrogen leakage risk level; The determining module is further configured to analyze the hydrogen concentration values of the power cabin roof, the hydrogen concentration values at the hydrogen gas tank of the power cabin, and the hydrogen concentration values at the pipeline of the power cabin in the parking mode to obtain the hydrogen leakage risk level in the parking mode; analyze the hydrogen concentration values of the power cabin roof, the hydrogen concentration values at the hydrogen gas tank of the power cabin, and the hydrogen concentration values at the pipeline of the power cabin in the parking power generation mode to obtain the hydrogen leakage risk level in the parking power generation mode; and analyze the hydrogen concentration values of the power cabin roof, the hydrogen concentration values at the hydrogen gas tank of the power cabin, and the hydrogen concentration values at the pipeline of the power cabin in the driving mode to obtain the hydrogen leakage risk level in the driving mode. The control module is further configured to, in response to the hydrogen leakage risk level being the first level in the parking power generation mode, determine, based on the first level in the parking power generation mode, that the emergency treatment measure corresponding to the hydrogen leakage of the power cabin roof is to close the parking power generation mode, upload the leakage alarm information to the vehicle control unit and the remote monitoring end, start an emergency evacuation alarm, open the power cabin exhaust system, cut off the emergency power load, close the hydrogen gas tank valve, switch the cathode gas inlet of the fuel cell to nitrogen, and unload the pipeline pressure; in response to the hydrogen leakage risk level being the second level in the parking power generation mode, determine, based on the second level in the parking power generation mode, that the emergency treatment measure corresponding to the hydrogen leakage at the hydrogen gas tank of the power cabin is to close the parking power generation mode, upload the leakage alarm information to the vehicle control unit and the remote monitoring end, cut off the emergency power load, close the hydrogen gas tank valve, switch the cathode gas inlet of the fuel cell to nitrogen, and unload the pipeline pressure; and in response to the hydrogen leakage risk level being the third level in the parking power generation mode, determine, based on the third level in the parking power generation mode, that the emergency treatment measure corresponding to the hydrogen leakage at the pipeline of the power cabin is to close the parking power generation mode, upload the leakage alarm information to the vehicle control unit and the remote monitoring end, cut off the emergency power load, close the hydrogen gas tank valve, and unload the pipeline pressure. The analysis module is further configured to, in response to the state parameters including a speed parameter, a parking brake parameter and a battery parameter of the fuel cell vehicle, and the timer detecting time being greater than or equal to the sleep time set by the vehicle state detector, analyze the state parameters of the fuel cell vehicle to obtain a current mode of the fuel cell vehicle, including: in response to the speed parameter being greater than a preset driving speed, determining that the current mode of the fuel cell vehicle is the driving mode; in response to the speed parameter being not greater than the preset driving speed, the parking brake parameter satisfying an open state, and the battery parameter satisfying a working state, determining that the current mode of the fuel cell vehicle is the parking power generation mode; and in response to the speed parameter being not greater than the preset driving speed, the parking brake parameter satisfying the open state, and the battery parameter not satisfying the working state, determining that the current mode of the fuel cell vehicle is the parking mode.

10. An electronic device, comprising: The method comprises: a memory storing an executable program; a processor configured to execute the program, wherein the program, when executed, performs the method of any one of claims 1 to 8.

11. A computer readable storage medium characterized by: The computer-readable storage medium comprises a stored executable program, wherein the executable program, when executed, controls a device in which the storage medium is located to perform the method of any one of claims 1 to 8.

12. A computer program product, characterised in that, The computer program, when executed by a processor, implements the method of any one of claims 1 to 8.

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