Safety management method and device for hydrogen fuel vehicle

Abstract

A safety management method and device for hydrogen fuel cell vehicles, relating to the field of fuel cell vehicle safety monitoring, includes the following steps: when the vehicle is in a hydrogen refueling state, a confined space, or a high-temperature environment, adjusting the warning levels corresponding to relevant warning parameters in a warning level table; the warning level table includes multiple warning parameters, each divided into multiple intervals based on its numerical range, with each interval corresponding to a warning level; if the current vehicle speed and mileage do not meet preset conditions, adjusting the warning levels corresponding to the relevant warning parameters in the warning level table accordingly; collecting the values ​​of each warning parameter at the current moment, matching them to the corresponding warning level in the adjusted warning level table according to the interval to which each value belongs, and outputting the final warning level according to preset rules. This method provides differentiated safety control for different vehicle operating states and external environments, improving the safety of hydrogen fuel cell vehicles during operation.

Description

Technical Field

[0001] This application relates to the field of safety monitoring for fuel cell vehicles, specifically to a safety management method and device for hydrogen fuel cell vehicles. Background Technology

[0002] Hydrogen fuel cells are characterized by high efficiency and zero emissions, and with increasing global emphasis on carbon emissions, they are being used in the automotive industry as a clean and efficient power source. However, hydrogen is the smallest gas molecule in nature, making it highly susceptible to leakage. Furthermore, hydrogen's explosive limits are 4%–75%, and its minimum ignition energy is 0.019 mJ / mol, making it extremely flammable and explosive. This poses significant safety risks to the application of hydrogen fuel cells in automobiles. Moreover, most current hydrogen fuel cell vehicles are "hybrid electric vehicles," meaning that the hydrogen fuel cell and lithium battery are connected in series and parallel to power the motor. Lithium batteries are susceptible to thermal runaway, fire, and even explosion. The safety issues of hydrogen and lithium batteries are compounded; if safety controls are not implemented in the vehicle's overall safety management system, the probability of safety failure is even higher, and the resulting damage is even greater.

[0003] At present, the safety management of hydrogen fuel cell vehicles mainly adopts pressure monitoring of the vehicle's hydrogen storage system, hydrogen leakage concentration monitoring in the relatively enclosed vehicle space, and insulation monitoring of the entire vehicle. When the indicators reach the safety limit, an emergency shutdown is carried out.

[0004] However, the safety of hydrogen fuel cells is strongly correlated with the vehicle's operating status and the external environment. Existing safety control technologies do not take into account the impact of the vehicle's operating status and the external environment on hydrogen fuel cell vehicles, which reduces the safety of hydrogen fuel cell vehicles during operation. Summary of the Invention

[0005] This application provides a safety management method and device for hydrogen fuel cell vehicles, which can take into account the vehicle's operating status and the impact of the external environment on hydrogen fuel cell vehicles, thereby improving the safety of hydrogen fuel cell vehicles during operation.

[0006] In a first aspect, embodiments of this application provide a safety management method for hydrogen fuel cell vehicles, the method comprising:

[0007] When the vehicle is in a hydrogen refueling state, a confined space, or a high-temperature environment, the warning level corresponding to the relevant warning parameter in the warning level table is adjusted; the warning level table includes a variety of warning parameters, and each warning parameter is divided into multiple intervals according to its numerical range, with each interval corresponding to a warning level.

[0008] If the current vehicle speed and mileage do not meet the preset conditions, adjust the warning level corresponding to the relevant warning parameters in the warning level table accordingly.

[0009] The system collects the values ​​of each warning parameter of the vehicle at the current time, matches the corresponding warning level according to the interval to which each value belongs in the adjusted warning level table, and outputs the final warning level according to the preset rules.

[0010] In conjunction with the first aspect, in one implementation, the preset rules include:

[0011] For all matched warning levels, starting from the lowest warning level, every two warning levels of the same level are merged into a warning level of the next higher level. When merging is no longer possible, the highest remaining warning level is the final warning level.

[0012] In conjunction with the first aspect, in one implementation, the warning parameters include:

[0013] Hydrogen leakage concentration, hydrogen emission concentration, insulation resistance, on-board hydrogen system temperature, on-board hydrogen system pressure, and BMS (Battery Management System) safety signals.

[0014] In conjunction with the first aspect, in one implementation, when the vehicle is in a hydrogen refueling state, the warning level corresponding to the relevant warning parameters in the warning level table is adjusted, including:

[0015] The warning levels for each range of hydrogen leakage concentration, hydrogen emission concentration, insulation resistance, on-board hydrogen system temperature, on-board hydrogen system pressure, and BMS safety signals have all been raised by one level.

[0016] In conjunction with the first aspect, in one implementation, when the vehicle is in a confined space, adjusting the warning level corresponding to the relevant warning parameters in the warning level table includes:

[0017] When the distance between the vehicle roof and body and the wall is lower than the first preset distance, and the wind speed is lower than the first preset wind speed, the warning level corresponding to each interval of hydrogen leakage concentration and hydrogen emission concentration will be raised by one level.

[0018] In conjunction with the first aspect, in one implementation, when the vehicle is in a high-temperature environment, adjusting the warning level corresponding to the relevant warning parameters in the warning level table includes:

[0019] When the ambient temperature near the vehicle is higher than the first preset temperature, the warning level corresponding to each range of the on-board hydrogen system temperature, on-board hydrogen system pressure, and BMS safety signal will be raised by one level.

[0020] In conjunction with the first aspect, in one implementation, if the vehicle speed at the current moment does not meet the preset conditions, the warning level corresponding to the relevant warning parameters in the warning level table is adjusted, including:

[0021] If the current vehicle speed is lower than the first preset speed, the warning level corresponding to each range of hydrogen leakage concentration and hydrogen emission concentration will be raised by one level.

[0022] In conjunction with the first aspect, in one implementation, if the vehicle's current mileage does not meet preset conditions, the warning level corresponding to the relevant warning parameters in the warning level table is adjusted, including:

[0023] If the vehicle's current mileage is higher than the first preset mileage, the warning level corresponding to each interval of the insulation resistance will be raised by one level.

[0024] In conjunction with the first aspect, in one embodiment, when the ambient humidity near the vehicle is higher than a first preset humidity, the method further includes:

[0025] The warning level for each range of insulation resistance is raised by one level.

[0026] Secondly, embodiments of this application provide a safety control device for a hydrogen fuel cell vehicle, the device comprising:

[0027] The judgment module is used to determine whether the vehicle is in a hydrogen refueling state, a confined space, or a high-temperature environment; it is also used to determine whether the current vehicle speed and mileage meet preset conditions.

[0028] The adjustment module is used to adjust the warning level corresponding to the relevant warning parameters in the warning level table when the vehicle is in a hydrogen refueling state, a confined space, or a high-temperature environment; it is also used to adjust the warning level corresponding to the relevant warning parameters in the warning level table if the current vehicle speed and vehicle mileage do not meet the preset conditions.

[0029] The early warning module is used to collect the values ​​of various early warning parameters of the vehicle at the current time, match the corresponding early warning level according to the interval to which each value belongs in the adjusted early warning level table, and output the final early warning level according to preset rules.

[0030] The beneficial effects of the technical solutions provided in this application include:

[0031] This application adjusts the warning levels corresponding to relevant warning parameters in the warning level table based on the vehicle's current environment (whether it is in a hydrogen refueling state, a confined space, or a high-temperature environment) and the vehicle's current operating status (whether the vehicle speed and mileage at the current moment meet preset conditions). Then, it collects the values ​​of each warning parameter of the vehicle at the current moment, matches the corresponding warning level in the adjusted warning level table according to the range to which each value belongs, and outputs the final warning level according to preset rules. In the process of safety management, the impact of the vehicle's working status and the external environment on hydrogen fuel cell vehicles is taken into account, thereby improving the safety of hydrogen fuel cell vehicles during operation. Attached Figure Description

[0032] Figure 1 This is a flowchart illustrating the safety management method for hydrogen fuel cell vehicles according to an embodiment of this application.

[0033] Figure 2 This is a schematic diagram of the safety control device for hydrogen fuel cell vehicles according to an embodiment of this application. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0036] Firstly, please refer to Figure 1 , Figure 1 This is a flowchart illustrating the safety management method for hydrogen fuel cell vehicles according to an embodiment of this application. The safety management method for hydrogen fuel cell vehicles provided in this embodiment includes the following steps:

[0037] Step S1: When the vehicle is in a hydrogen refueling state, a confined space, or a high-temperature environment, adjust the warning level corresponding to the relevant warning parameters in the warning level table.

[0038] The aforementioned warning level table includes various warning parameters. Each warning parameter is divided into multiple intervals based on its numerical range, and each interval corresponds to a warning level.

[0039] Step S2: If the current vehicle speed and vehicle mileage do not meet the preset conditions, adjust the warning level corresponding to the relevant warning parameters in the warning level table respectively.

[0040] Step S3: Collect the values ​​of each warning parameter of the vehicle at the current time, match the corresponding warning level according to the interval to which each value belongs in the adjusted warning level table, and output the final warning level according to the preset rules.

[0041] This method adjusts the warning levels corresponding to relevant warning parameters in the warning level table based on the vehicle's current environment (whether it is in a hydrogen refueling state, a confined space, or a high-temperature environment) and its current operating status (whether the vehicle speed and mileage at the current moment meet preset conditions). Then, it collects the values ​​of each warning parameter of the vehicle at the current moment, matches the corresponding warning level in the adjusted warning level table according to the range to which each value belongs, and outputs the final warning level according to preset rules. In the safety management process, the influence of the vehicle's working status and the external environment on hydrogen fuel cell vehicles is taken into account, thereby improving the safety of hydrogen fuel cell vehicles during operation.

[0042] In some embodiments, the warning level table in steps S1-S3 above is shown in Table 1.

[0043] Table 1

[0044]

[0045] In Table 1, P represents the nominal operating pressure of the on-board hydrogen system. When the value of the BMS safety signal meets any one of conditions a, b, or c, the warning level matched by the BMS safety signal value is Level 2 warning.

[0046] It should be noted that when the value of the warning parameter is not in any range, since the value of the warning parameter has not reached the range where a warning is required, the warning level corresponding to the value of the warning parameter will not be considered in subsequent steps.

[0047] In some embodiments, the warning parameters in steps S1-S3 above include:

[0048] Hydrogen leakage concentration, hydrogen emission concentration, insulation resistance, on-board hydrogen system temperature, on-board hydrogen system pressure, and BMS safety signals.

[0049] In some embodiments, in step S1 above, when the vehicle is in the hydrogen refueling state, the warning level corresponding to the relevant warning parameters in the warning level table is adjusted, including:

[0050] The warning levels for each range of hydrogen leakage concentration, hydrogen emission concentration, insulation resistance, on-board hydrogen system temperature, on-board hydrogen system pressure, and BMS safety signals have all been raised by one level.

[0051] This embodiment determines whether a vehicle is in a hydrogen refueling state by using vehicle signals. When a vehicle is in a hydrogen refueling state, it means that the vehicle is in a hydrogen storage area, so it is necessary to raise the warning level corresponding to the relevant warning parameters in the warning level table.

[0052] It should be noted that when the warning level corresponding to the interval of the warning parameter is the highest level, the original warning level remains unchanged when the warning level corresponding to that interval is increased. This rule applies to all situations in this manual where the warning level is increased, and will not be elaborated further below.

[0053] In some embodiments, in step S1 above, when the vehicle is in a confined space, adjusting the warning level corresponding to the relevant warning parameters in the warning level table includes:

[0054] When the distance between the vehicle roof and body and the wall is lower than the first preset distance, and the wind speed is lower than the first preset wind speed, the warning level corresponding to each interval of hydrogen leakage concentration and hydrogen emission concentration will be raised by one level.

[0055] Specifically, the distance between the vehicle roof and body and the wall can be measured using an onboard LiDAR, and the wind speed can be measured using an onboard anemometer. In this embodiment, the first preset distance is preferably set to 0.5 meters, and the first preset wind speed is preferably set to 0.5 m / s.

[0056] In some embodiments, in step S1 above, when the vehicle is in a high-temperature environment, adjusting the warning level corresponding to the relevant warning parameters in the warning level table includes:

[0057] When the ambient temperature near the vehicle is higher than the first preset temperature, the warning level corresponding to each range of the on-board hydrogen system temperature, on-board hydrogen system pressure, and BMS safety signal will be raised by one level.

[0058] It should be noted that "near the vehicle" refers to a preset range centered on the vehicle, which can be flexibly adjusted according to the actual operating conditions of the vehicle. In this embodiment, the first preset temperature is preferably set to 45°C.

[0059] In some embodiments, in step S2 above, if the vehicle speed at the current moment does not meet the preset conditions, the warning level corresponding to the relevant warning parameters in the warning level table is adjusted, including:

[0060] If the current vehicle speed is lower than the first preset speed, the warning level corresponding to each range of hydrogen leakage concentration and hydrogen emission concentration will be raised by one level.

[0061] When the vehicle speed is lower than the first preset speed, it indicates that the vehicle is idling. In this state, the hydrogen emission concentration is high and hydrogen is prone to accumulation. Therefore, it is necessary to increase the warning level corresponding to each range of hydrogen leakage concentration and hydrogen emission concentration. In this embodiment, the first preset speed is preferably set to 10 km / h.

[0062] In some embodiments, in step S2 above, if the vehicle's current mileage does not meet the preset conditions, the warning level corresponding to the relevant warning parameters in the warning level table is adjusted, including:

[0063] If the vehicle's current mileage is higher than the first preset mileage, the warning level corresponding to each interval of the insulation resistance will be raised by one level.

[0064] In this embodiment, the first preset vehicle mileage is preferably set to 100,000 kilometers.

[0065] In some embodiments, when the ambient humidity near the vehicle is higher than a first preset humidity, the method further includes:

[0066] The warning level for each range of insulation resistance is raised by one level.

[0067] In this embodiment, the first preset humidity is preferably set to 80%.

[0068] In some embodiments, the preset rules in step S3 above include:

[0069] For all matched warning levels, starting from the lowest warning level, every two warning levels of the same level are merged into a warning level of the next higher level. When merging is no longer possible, the highest remaining warning level is the final warning level.

[0070] In a more specific embodiment, the preset rules are shown in Tables 2, 3, 4 and 5.

[0071] Table 2

[0072]

[0073] Table 3

[0074]

[0075] Table 4

[0076]

[0077] Table 5

[0078]

[0079] It should be noted that Tables 2, 3, 4, and 5 are quick reference tables for the aforementioned preset rules. This means that the final warning level can be quickly found in each table based on the number of warnings at each level. The leftmost column of each table represents the final warning level, and the rightmost columns represent the number of warnings at each level. When searching, follow the order of Tables 2, 3, 4, and 5. That is, if the final warning level does not meet the conditions for a Level 1 warning, then search for the conditions for a Level 2 warning, and so on, until a final warning level that meets the conditions is found.

[0080] In Tables 2, 3, 4 and 5, X represents any number of warnings at the current level. For example, in the first row of Table 2, when there is one Level 1 warning, any number of Level 2 warnings, any number of Level 3 warnings and any number of Level 4 warnings, the final warning level is Level 1 warning.

[0081] In Tables 2 and 3 above, there are special cases beyond the preset rules. In Table 2, when there are 0 Level 1 warnings, 0 Level 2 warnings, 2 or more Level 3 warnings, and 3 or more Level 4 warnings, the final warning level is Level 1. In Table 3, when there are 0 Level 1 warnings, 0 Level 2 warnings, 0 Level 3 warnings, and 3 or more Level 4 warnings, the final warning level is Level 2.

[0082] In some embodiments, after step S3 is completed, the following step is further included:

[0083] Implement the corresponding early warning measures based on the final early warning level.

[0084] In some embodiments, the warning measures include, but are not limited to:

[0085] The vehicle will use its in-vehicle broadcast system to alert passengers to stop and evacuate, and will then forcibly cut off power after a first preset time.

[0086] The vehicle was forced to reduce its speed, and passengers were prompted to stop and inspect the vehicle via the in-vehicle broadcast.

[0087] The system uses in-vehicle radio to remind drivers to drive cautiously and displays the collected values ​​of various warning parameters on the in-vehicle display screen.

[0088] The vehicle will announce to its occupants via the in-vehicle radio that a malfunction has occurred.

[0089] The aforementioned warning measures can be flexibly adjusted according to the actual operating conditions of the vehicle. The reference settings given in this embodiment are as follows: when the final warning level is Level 1, the occupants are prompted to stop and evacuate via the vehicle broadcast, and the power is forcibly cut off after a first preset time; when the final warning level is Level 2, the vehicle speed is forcibly reduced, and the occupants are prompted to stop and check via the vehicle broadcast; when the final warning level is Level 3, the driver is prompted to drive cautiously via the vehicle broadcast, and the values ​​of each warning parameter collected are displayed on the vehicle display screen; when the final warning level is Level 4, the occupants are prompted that the vehicle has malfunctioned via the vehicle broadcast.

[0090] Secondly, please refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of the safety control device for hydrogen fuel cell vehicles according to an embodiment of this application. The safety control device for hydrogen fuel cell vehicles provided in this embodiment includes a judgment module, an adjustment module, and an early warning module.

[0091] The judgment module is used to determine whether the vehicle is in a hydrogen refueling state, a confined space, or a high-temperature environment. It is also used to determine whether the current vehicle speed and mileage meet preset conditions.

[0092] The adjustment module is used to adjust the warning level corresponding to the relevant warning parameters in the warning level table when the vehicle is in a hydrogen refueling state, a confined space, or a high-temperature environment. It is also used to adjust the warning level corresponding to the relevant warning parameters in the warning level table if the current vehicle speed and mileage do not meet preset conditions.

[0093] The early warning module is used to collect the values ​​of various early warning parameters of the vehicle at the current time, match the corresponding early warning level according to the range to which each value belongs in the adjusted early warning level table, and output the final early warning level according to preset rules.

[0094] This device uses a judgment module to determine the vehicle's current environment (whether it is in a hydrogen refueling state, a confined space, or a high-temperature environment) and the vehicle's current operating status (current speed and mileage). An adjustment module adjusts the warning levels corresponding to relevant parameters in a preset warning level table. The warning module collects the values ​​of each warning parameter at the current moment and matches them to the corresponding warning level in the adjusted warning level table based on their respective ranges. The final warning level is then output according to preset rules. This approach considers the vehicle's operating status and the impact of the external environment on hydrogen fuel cell vehicles during safety management, thus improving the safety of hydrogen fuel cell vehicles during operation.

[0095] It should be noted that the sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0096] The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus. The terms "first," "second," and "third," etc., are used to distinguish different objects, etc., and do not indicate a sequence, nor do they limit "first," "second," and "third" to different types.

[0097] In the description of the embodiments of this application, terms such as "exemplary," "for example," or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplary," "for example," or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary," "for example," or "for instance" is intended to present the relevant concepts in a concrete manner.

[0098] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0099] In some processes described in the embodiments of this application, multiple operations or steps are included in a specific order. However, it should be understood that these operations or steps may not be executed in the order they appear in the embodiments of this application, or they may be executed in parallel. The sequence number of the operation is only used to distinguish different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed sequentially or in parallel, and these operations or steps may be combined.

[0100] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device to execute the methods described in the various embodiments of this application.

[0101] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A safety management method for hydrogen fuel cell vehicles, characterized in that, The method includes: When the vehicle is in a hydrogen refueling state, a confined space, or a high-temperature environment, the warning level corresponding to the relevant warning parameter in the warning level table is adjusted; the warning level table includes a variety of warning parameters, and each warning parameter is divided into multiple intervals according to its numerical range, with each interval corresponding to a warning level. If the current vehicle speed and mileage do not meet the preset conditions, adjust the warning level corresponding to the relevant warning parameters in the warning level table accordingly. The system collects the values ​​of each warning parameter of the vehicle at the current time, matches the corresponding warning level according to the interval to which each value belongs in the adjusted warning level table, and outputs the final warning level according to the preset rules.

2. The safety management method for hydrogen fuel cell vehicles as described in claim 1, characterized in that, The preset rules include: For all matched warning levels, starting from the lowest warning level, every two warning levels of the same level are merged into a warning level of the next higher level. When merging is no longer possible, the highest remaining warning level is the final warning level.

3. The safety management method for hydrogen fuel cell vehicles as described in claim 1, characterized in that, The warning parameters include: Hydrogen leakage concentration, hydrogen emission concentration, insulation resistance, on-board hydrogen system temperature, on-board hydrogen system pressure, and BMS safety signals.

4. The safety management method for hydrogen fuel cell vehicles as described in claim 2, characterized in that, When the vehicle is refueling with hydrogen, adjust the warning level corresponding to the relevant warning parameters in the warning level table, including: The warning levels for each range of hydrogen leakage concentration, hydrogen emission concentration, insulation resistance, on-board hydrogen system temperature, on-board hydrogen system pressure, and BMS safety signals have all been raised by one level.

5. The safety management method for hydrogen fuel cell vehicles as described in claim 2, characterized in that, When the vehicle is in a confined space, adjust the warning level corresponding to the relevant warning parameters in the warning level table, including: When the distance between the vehicle roof and body and the wall is lower than the first preset distance, and the wind speed is lower than the first preset wind speed, the warning level corresponding to each interval of hydrogen leakage concentration and hydrogen emission concentration will be raised by one level.

6. The safety management method for hydrogen fuel cell vehicles as described in claim 2, characterized in that, When a vehicle is in a high-temperature environment, adjust the warning level corresponding to the relevant warning parameters in the warning level table, including: When the ambient temperature near the vehicle is higher than the first preset temperature, the warning level corresponding to each range of the on-board hydrogen system temperature, on-board hydrogen system pressure, and BMS safety signal will be raised by one level.

7. The safety management method for hydrogen fuel cell vehicles as described in claim 2, characterized in that, If the current vehicle speed does not meet the preset conditions, adjust the warning level corresponding to the relevant warning parameters in the warning level table, including: If the current vehicle speed is lower than the first preset speed, the warning level corresponding to each range of hydrogen leakage concentration and hydrogen emission concentration will be raised by one level.

8. The safety management method for hydrogen fuel cell vehicles as described in claim 2, characterized in that, If the vehicle's current mileage does not meet the preset conditions, adjust the warning level corresponding to the relevant warning parameters in the warning level table, including: If the vehicle's current mileage is higher than the first preset mileage, the warning level corresponding to each interval of the insulation resistance will be raised by one level.

9. The safety management method for hydrogen fuel cell vehicles as described in claim 2, characterized in that, When the ambient humidity near the vehicle is higher than the first preset humidity, it also includes: The warning level for each range of insulation resistance is raised by one level.

10. A safety control device for a hydrogen fuel cell vehicle based on the method of any one of claims 1-9, characterized in that, The device includes: The judgment module is used to determine whether the vehicle is in a hydrogen refueling state, a confined space, or a high-temperature environment; it is also used to determine whether the current vehicle speed and mileage meet preset conditions. The adjustment module is used to adjust the warning level corresponding to the relevant warning parameters in the warning level table when the vehicle is in a hydrogen refueling state, a confined space, or a high-temperature environment; it is also used to adjust the warning level corresponding to the relevant warning parameters in the warning level table if the current vehicle speed and vehicle mileage do not meet the preset conditions. The early warning module is used to collect the values ​​of various early warning parameters of the vehicle at the current time, match the corresponding early warning level according to the interval to which each value belongs in the adjusted early warning level table, and output the final early warning level according to preset rules.

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