Hydrogen leakage monitoring method, device and fuel cell vehicle

Abstract

The present application relates to the technical field of new energy power generation vehicles, and discloses a hydrogen leakage monitoring method, device and fuel cell vehicle, the method comprising: monitoring the hydrogen concentration of a first space through a first concentration sensor to obtain first hydrogen concentration data; monitoring the hydrogen concentration in a hydrogen bottle through a second concentration sensor to obtain second hydrogen concentration data; determining the hydrogen mass change data in the hydrogen bottle based on the second hydrogen concentration data; conducting leakage assessment according to the hydrogen mass change data and the first hydrogen concentration data to obtain hydrogen leakage assessment data; conducting temperature detection of the first space through a first imaging sensor to obtain first temperature distribution data; determining the hydrogen leakage situation in the first space according to the first hydrogen concentration data, hydrogen leakage assessment data and the first temperature distribution data. Its beneficial effect is that it solves the problem of a single detection means for detecting hydrogen leakage and improves the accuracy of fuel cell hydrogen leakage detection.

Description

Technical Field

[0001] The present application relates to the technical field of new energy power generation vehicles, and in particular to a hydrogen leakage monitoring method, device and fuel cell vehicle. Background Art

[0002] Since hydrogen energy is a renewable clean energy carrier, the fuel cell in the fuel cell vehicle uses hydrogen as fuel. The hydrogen fuel cell can be used as a functional device of the vehicle power system and can also be used as an external power supply device, which has broad development prospects. In addition, the fuel cell vehicle is equipped with a hydrogen storage tank and relatively complex intake and exhaust pipes.

[0003] In the related art, the method for detecting hydrogen leakage of a fuel cell is to use a hydrogen concentration sensor to detect the hydrogen concentration around the fuel cell. However, the accuracy of detecting hydrogen leakage of a fuel cell in the related art needs to be improved. Summary of the invention

[0004] The present application provides a hydrogen leakage monitoring method, device and fuel cell vehicle, which solves the technical problem of single detection means in detecting hydrogen leakage by hydrogen concentration sensor in the related art, and achieves the technical effect of improving the accuracy of fuel cell hydrogen leakage detection.

[0005] In order to achieve the above objectives, the main technical solutions adopted in this application include:

[0006] The present application provides a hydrogen leakage monitoring method, which is applied to a fuel cell vehicle, wherein the fuel cell vehicle comprises a container, wherein a first space for placing a hydrogen supply system and a second space for placing a stack system are arranged in the container, wherein the hydrogen supply system comprises a hydrogen bottle group, wherein the hydrogen bottle group provides hydrogen to the stack system, wherein a first concentration sensor and a first imaging sensor are arranged in the first space, and a second concentration sensor is arranged in a hydrogen bottle of the hydrogen bottle group; the method comprises:

[0007] Monitoring the hydrogen concentration in the first space by using the first concentration sensor to obtain first hydrogen concentration data;

[0008] Monitoring the hydrogen concentration in the hydrogen bottle by using the second concentration sensor to obtain second hydrogen concentration data;

[0009] Perform leakage assessment according to the second hydrogen concentration data, the first hydrogen concentration data and the hydrogen supply status data of the hydrogen bottle group providing hydrogen to the fuel cell system to obtain hydrogen leakage assessment data;

[0010] Detecting the temperature of the first space by using the first imaging sensor to obtain first temperature distribution data;

[0011] A hydrogen leakage situation in the first space is determined according to the first hydrogen concentration data, the hydrogen leakage assessment data, and the first temperature distribution data.

[0012] The hydrogen leakage monitoring method provided in the embodiment of the present application monitors the hydrogen concentration change data in the first space of the hydrogen storage system and the hydrogen mass change data in the hydrogen bottle, and evaluates the hydrogen leakage situation of the hydrogen bottle and the first space according to the relationship between the change data; at the same time, the temperature distribution is used as auxiliary data to analyze the diffusion degree of the leaked hydrogen in the first space, so that the user can fully grasp the hydrogen leakage information, improve the accuracy and reliability of data analysis, and thus perform targeted emergency operations according to the specific risk level, so as to achieve more comprehensive safety management of the hydrogen storage system.

[0013] In one embodiment, the detecting the temperature of the first space by the first imaging sensor to obtain first temperature distribution data includes:

[0014] If the hydrogen leakage assessment data exceeds a preset leakage assessment threshold, the first imaging sensor is used to detect the temperature of the first space to obtain the first temperature distribution data.

[0015] In one embodiment, determining the hydrogen leakage situation in the first space according to the first hydrogen concentration data, the hydrogen leakage assessment data and the first temperature distribution data includes:

[0016] If the hydrogen leakage assessment data exceeds a preset leakage assessment threshold, generating a hydrogen distribution heat map corresponding to the first space according to the first hydrogen concentration data and the first temperature distribution data;

[0017] The hydrogen leakage situation in the first space is determined according to the hydrogen distribution heat map.

[0018] In one embodiment, generating a hydrogen distribution heat map corresponding to the first space according to the first hydrogen concentration data and the first temperature distribution data includes:

[0019] Performing feature extraction on the first hydrogen concentration data to obtain first concentration feature data;

[0020] Performing feature extraction on the first temperature distribution data to obtain first distribution feature data;

[0021] A hydrogen distribution heat map corresponding to the first space is generated according to a fusion result between the first concentration characteristic data and the first distribution characteristic data.

[0022] In one embodiment, the first distribution characteristic data includes hydrogen diffusion edge and temperature gradient data; the feature extraction of the first temperature distribution data to obtain the first distribution characteristic data includes:

[0023] Preprocessing the first temperature distribution data; wherein the preprocessing includes at least one of denoising, contrast enhancement and normalization;

[0024] Performing edge detection on the first temperature distribution data by using an edge detection algorithm to obtain the hydrogen diffusion edge;

[0025] Performing gradient calculation on the first temperature distribution data to obtain the temperature gradient data.

[0026] In one embodiment, a second imaging sensor is disposed in the second space; and the method further comprises:

[0027] Detecting the temperature of the second space by using the second imaging sensor to obtain second temperature distribution data;

[0028] The hydrogen leakage situation in the second space is determined according to the second temperature distribution data.

[0029] In one of the embodiments, the method further includes: if the hydrogen leakage assessment data exceeds a preset leakage assessment threshold, determining the current operating state of the fuel cell vehicle; and determining the current risk level of the fuel cell vehicle based on the current operating state of the fuel cell vehicle, the hydrogen leakage situation in the first space, and the hydrogen leakage situation in the second space.

[0030] In one embodiment, different risk levels correspond to different warning methods; the method further includes: triggering the warning method corresponding to the current risk level to initiate a management strategy corresponding to the current risk level to perform emergency management on the fuel cell vehicle.

[0031] The present application provides a hydrogen leakage monitoring device, which is applied to a fuel cell vehicle. The fuel cell vehicle includes a container, wherein a first space for placing a hydrogen supply system and a second space for placing a fuel cell stack system are provided in the container. The hydrogen supply system includes a hydrogen bottle group, which provides hydrogen to the fuel cell stack system. A first concentration sensor and a first imaging sensor are deployed in the first space, and a second concentration sensor is provided in a hydrogen bottle of the hydrogen bottle group. The device includes:

[0032] A first concentration monitoring module, configured to monitor the hydrogen concentration of the first space through the first concentration sensor to obtain first hydrogen concentration data;

[0033] A second concentration monitoring module, used to monitor the hydrogen concentration in the hydrogen bottle through the second concentration sensor to obtain second hydrogen concentration data;

[0034] a hydrogen leakage assessment module, configured to perform leakage assessment according to the second hydrogen concentration data, the first hydrogen concentration data and the hydrogen supply status data of the hydrogen bottle group providing hydrogen to the fuel cell system, and obtain hydrogen leakage assessment data;

[0035] A first temperature detection module, configured to detect the temperature of the first space by using the first imaging sensor to obtain first temperature distribution data;

[0036] A leakage situation determination module is used to determine the hydrogen leakage situation in the first space according to the first hydrogen concentration data, the hydrogen leakage assessment data and the first temperature distribution data.

[0037] The present application also provides a fuel cell vehicle, which includes an electric vehicle chassis and a container, wherein the container includes a hydrogen fuel cell system, a hydrogen storage system, a buffer lithium battery system, a power inverter system, an air conditioning system, and an air intake and exhaust system, wherein the hydrogen storage system executes the method described in any one of the above embodiments to perform hydrogen leakage monitoring.

[0038] The present application also provides a computer device, including: a memory and a processor, the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes any one of the methods in the above embodiments by executing the computer instructions.

[0039] The present application also provides a computer-readable storage medium, on which computer instructions are stored, and the computer instructions are used to enable a computer to execute the method described in any of the above embodiments.

[0040] The present application also provides a computer program product, including computer instructions, wherein the computer instructions are used to enable a computer to execute the method described in any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0042] Figure 1a A schematic diagram of the structure of a fuel cell vehicle provided in an embodiment of the present application;

[0043] Figure 1b This is a topological diagram of energy transmission in a fuel cell vehicle in an embodiment of the present application;

[0044] Figure 2 A step diagram of a hydrogen leakage monitoring method provided in an embodiment of the present application;

[0045] Figure 3 A schematic diagram of the internal structure of a container is provided for an embodiment of the present application;

[0046] Figure 4 A diagram showing the steps of determining the hydrogen leakage in the first space in an embodiment of the present application;

[0047] Figure 5 A diagram showing the steps for generating a hydrogen distribution heat map in an embodiment of the present application;

[0048] Figure 6 A diagram showing the steps of obtaining first distribution characteristic data in an embodiment of the present application;

[0049] Figure 7 This is a top view of the first space when hydrogen leakage occurs in the embodiment of the present application;

[0050] Figure 8 A module diagram of a hydrogen leakage monitoring device provided in an embodiment of the present application;

[0051] Fig. 9 A schematic diagram of the structure of a computer device provided in an embodiment of the present application.

[0052] Among them, the figure numbers of the drawings in the specification are as follows: 100. Electric vehicle chassis, 101. Power battery, 200. Container, 201. Hydrogen fuel cell system, 202. Hydrogen storage system, 203. Buffered lithium battery system, 204. Power inverter system, 205. Air conditioning system, 206. Air intake and exhaust system, 210. First space, 211. Hydrogen bottle, 212. First concentration sensor, 213. Second concentration sensor, 214. First imaging sensor, 220. Second space, 221. Battery stack system, 222. Second imaging sensor, 301. First concentration monitoring module, 302. Second concentration monitoring module, 303. Mass change determination module, 304. Hydrogen leakage assessment module, 305. First temperature detection module, 306. Leakage situation determination module, 400. Leaking hydrogen cloud. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0054] As a clean energy, hydrogen energy has the advantages of high energy density and high energy conversion efficiency. In addition, hydrogen energy does not produce greenhouse gases during use and can reduce air pollution. It is an important direction for the development of the current energy and technology fields. Hydrogen fuel cells are an important application of hydrogen energy. They take advantage of the high energy density and cleanliness of hydrogen energy, provide an energy source that can meet the requirements of long-term endurance and low carbon emissions, and show great potential and application prospects in transportation, power generation, industry and other fields.

[0055] Based on the application of hydrogen fuel cells, this application provides a fuel cell vehicle, referring to Figure 1a , Figure 1a A structural schematic diagram of a fuel cell vehicle provided in an embodiment of the present application, as shown in the figure, the fuel cell vehicle includes an electric vehicle chassis and a container, and the container includes a hydrogen fuel cell system 201, a hydrogen storage system 202, a buffer lithium battery system 203, a power inverter system 204, an air conditioning system 205 and an air intake and exhaust system 206.

[0056] Specifically, the hydrogen fuel cell system 201 is used to output electrical energy to the outside for emergency power supply operations. For example, the hydrogen fuel cell group is composed of two hydrogen fuel cell reactors with an output power of 130kW in parallel, with a power density of 700W / kg and a service life of up to 30,000h. In the parallel output mode, the two hydrogen fuel cell reactors are required to operate at the same operating voltage and ensure current balance to ensure that the two reactors share the load evenly. In addition, the hydrogen fuel cell group also integrates a monitoring system to detect the working status of the fuel cell in real time, and complete the safety isolation between the two reactors when necessary to ensure the stability of the system operation.

[0057] Furthermore, the hydrogen carrying system 202 is used to store hydrogen energy, including a hydrogen filling system, a hydrogen storage system and a hydrogen supply system. Exemplarily, the hydrogen storage system consists of 16 210L aluminum alloy liner carbon fiber wrapped Class III composite hydrogen cylinders, each of which is equipped with a bottle tail combination valve and a bottle mouth combination valve. The bottle tail combination valve is equipped with a PRD device, which can release hydrogen at a set pressure threshold (35MPa) to achieve over-temperature and over-pressure protection. The hydrogen supply system is mainly composed of a main solenoid valve, a pressure reducing valve, a pressure sensor, a safety valve, etc. The main solenoid valve and the pressure reducing valve control the hydrogen flow and hydrogen pressure through the control signal of the fuel cell stack ECU to meet the working requirements of the stack.

[0058] Furthermore, the buffer lithium battery system 203 is used to assist the hydrogen fuel cell system 201 in outputting electrical energy to solve the problem of long startup time of the hydrogen fuel cell system 201. The buffer lithium battery system 203 includes a lithium battery pack, and the lithium battery pack and the hydrogen fuel cell are controlled by an energy management system. The fuel cell vehicle has two working conditions: off-grid power supply and grid-connected power supply. Under the off-grid power supply condition, the fuel cell vehicle outputs AC400V power to the external load, and its power comes from the fuel cell and the lithium battery; when the grid is connected to the power supply, if the mains power is normal, the power output to the external load comes from the power grid, and the inverter power supply PCS is in a backup state. If the mains power fails, the inverter power supply PCS switches from grid-connected to off-grid, and the power output to the external load comes from the fuel cell and the lithium battery.

[0059] Reference Figure 1b , Figure 1b This is a topology diagram of energy transmission in a fuel cell vehicle in an embodiment of the present application. As shown in the figure, in the startup stage of powering an external load, the buffer lithium battery is used to output power to the outside because the transient performance of the fuel cell is poor; in the hybrid power generation stage, the buffer lithium battery and the fuel cell jointly output power, and the energy management system adjusts the output power of the lithium battery pack according to the SOC of the buffer lithium battery, and the output of the lithium battery pack plays a role in peak shaving and valley filling; in the fuel cell rated power generation stage, the fuel cell's power generation redundancy can also charge the vehicle-mounted power battery.

[0060] In addition, the container of the fuel cell vehicle is also provided with an air conditioning system 205, and the temperature in the container is adjusted by the air conditioning system 205. For example, when the ambient temperature is too high, the hydrogen fuel cell system 201 and the buffer lithium battery system 203 will have a temperature rise under the condition of long-term high output, resulting in a problem of reduced output efficiency or even damage, so the temperature in the container is reduced by the air conditioning system 205; when the ambient temperature is too low, the hydrogen fuel cell system 201 will take too long to start due to the low temperature, which affects the use of the fuel cell vehicle. At this time, the temperature in the container can be increased by the air conditioning system 205, shortening the cold start time of the hydrogen fuel cell system 201, so that the hydrogen fuel cell system 201 can output electrical energy faster.

[0061] Furthermore, an air intake and exhaust system 206 is provided in the container of the fuel cell vehicle, and the air intake and exhaust system 206 accelerates the air flow inside and outside the container, thereby cooling the hydrogen fuel cell system 201 and the buffer lithium battery system 203 when necessary.

[0062] It can be seen from the fuel cell vehicle provided in this application that the hydrogen fuel cell is usually provided at the same time as the hydrogen storage system 202, wherein the hydrogen storage system 202 is used to store hydrogen and output it to the hydrogen fuel cell stack for the hydrogen fuel cell to react and output energy. Currently common hydrogen storage systems 202 include high-pressure compressed hydrogen storage, metal hydride hydrogen storage, and organic liquid hydride hydrogen storage, etc., wherein high-pressure compressed hydrogen storage is a technology for storing gaseous hydrogen by high-pressure compression above the critical temperature of hydrogen, and usually uses a gas tank as a container, which has the advantages of low cost and fast hydrogen charging and discharging speed, but also has the safety hazard of high hydrogen storage pressure. The high hydrogen storage pressure and the small molecular weight of hydrogen molecules lead to a significant increase in the risk of hydrogen leakage in the hydrogen storage system 202.

[0063] In order to eliminate the potential safety hazards of the hydrogen storage system 202, the relevant technologies include, on the one hand, improving the materials of the hydrogen storage tank and developing more reliable high-pressure resistant materials; on the other hand, strengthening the safety monitoring of the hydrogen storage system 202 and promptly handling hydrogen leakage in the early stage to reduce the impact of hydrogen leakage on safety issues. However, in the current relevant technologies, the monitoring of hydrogen leakage in the hydrogen storage system 202 is only performed by detecting the hydrogen concentration around the fuel cell through a hydrogen concentration sensor, which has the problem of a single detection method and unsatisfactory detection accuracy. The hydrogen concentration sensor is greatly affected by environmental factors during use, and requires regular calibration and maintenance, and has a high cost of use.

[0064] Based on the above problems, the present application provides a hydrogen leakage monitoring method, device, equipment, medium and fuel cell vehicle, the method comprising: monitoring the hydrogen concentration of the first space 210 through a first concentration sensor 212 to obtain first hydrogen concentration data; monitoring the hydrogen concentration in the hydrogen bottle 211 through a second concentration sensor 213 to obtain second hydrogen concentration data; determining the hydrogen mass change data in the hydrogen bottle 211 based on the second hydrogen concentration data; performing leakage assessment according to the hydrogen mass change data and the first hydrogen concentration data to obtain hydrogen leakage assessment data; performing temperature detection on the first space 210 through a first imaging sensor 214 to obtain first temperature distribution data; determining the hydrogen leakage situation in the first space 210 according to the first hydrogen concentration data, the hydrogen leakage assessment data and the first temperature distribution data.

[0065] The present application provides a hydrogen leakage monitoring method, device, equipment, medium and fuel cell vehicle, which solves the technical problem of the single detection means in the related art of detecting hydrogen leakage by hydrogen concentration sensor, and achieves the technical effect of improving the accuracy of fuel cell hydrogen leakage detection.

[0066] According to an embodiment of the present application, an embodiment of a hydrogen leakage monitoring method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0067] Reference Figure 2 , Figure 2 A step diagram of a hydrogen leakage monitoring method provided in an embodiment of the present application, as shown in the figure, in this embodiment, a hydrogen leakage monitoring method is provided, which is applied to a fuel cell vehicle, wherein the fuel cell vehicle comprises a container 200, wherein a first space 210 for placing a hydrogen supply system and a second space 220 for placing a stack system 221 are provided in the container 200, wherein the hydrogen supply system comprises a hydrogen bottle group, wherein the hydrogen bottle group provides hydrogen to the stack system 221, wherein a first concentration sensor 212 and a first imaging sensor 214 are deployed in the first space 210, and a second concentration sensor 213 is provided in the hydrogen bottle 211 of the hydrogen bottle group; the method comprises:

[0068] S100. Monitor the hydrogen concentration in the first space 210 through the first concentration sensor 212 to obtain first hydrogen concentration data.

[0069] S200. Monitor the hydrogen concentration in the hydrogen bottle 211 through the second concentration sensor 213 to obtain second hydrogen concentration data.

[0070] S300. Perform leakage assessment based on the second hydrogen concentration data, the first hydrogen concentration data and the hydrogen supply status data of the hydrogen bottle group providing hydrogen to the fuel cell system 221 to obtain hydrogen leakage assessment data.

[0071] S400 . Detect the temperature of the first space 210 through the first imaging sensor 214 to obtain first temperature distribution data.

[0072] S500. Determine the hydrogen leakage situation in the first space 210 according to the first hydrogen concentration data, the hydrogen leakage assessment data and the first temperature distribution data.

[0073] Specifically, refer to Figure 3 , Figure 3 The present invention provides a schematic diagram of the internal structure of a container. As shown in the figure, the container 200 includes a first space 210 and a second space 220 that are adjacent to each other. The first space 210 and the second space 220 are independent of each other. When the fuel cell vehicle is working, the first space 210 and the second space 220 are both closed spaces. The first space 210 is provided with a hydrogen supply system, which includes a hydrogen bottle group, and the hydrogen bottle group includes a plurality of hydrogen bottles 211. Figure 3 A hydrogen bottle group consisting of two hydrogen bottles 211 is used as an example. A first concentration sensor 212 and a first imaging sensor 214 are also provided in the first space 210. The first concentration sensor 212 is used to monitor the change of hydrogen concentration in the first space 210. The first imaging sensor 214 is arranged toward the hydrogen bottle group and is used to monitor the temperature distribution around the hydrogen bottle 211 in the hydrogen bottle group. A fuel cell system 221 is provided in the second space 220. Figure 3 Two battery stack systems 221 are used as an illustration, and the battery stack system 221 is connected to the hydrogen bottle group in the first space 210, and receives hydrogen supply through the hydrogen bottles 211 in the hydrogen bottle group.

[0074] Furthermore, the first concentration sensor 212 may include a plurality of sensors, and all of them are arranged near the hydrogen bottle group. Figure 3Only one first concentration sensor 212 is drawn in the figure, and the first concentration sensor 212 is arranged near the mouth of the hydrogen bottle 211. Accordingly, other first concentration sensors 212 not drawn can be arranged in a matrix near the body of the hydrogen bottle 211 and the tail of the hydrogen bottle 211. The first concentration sensor 212 is used to monitor the change of hydrogen concentration around the hydrogen bottle group in real time to obtain first hydrogen concentration data. If one or more first concentration sensors 212 at a relatively close distance detect an increase in the first hydrogen concentration data, it indicates that hydrogen leakage may occur near the above-mentioned first concentration sensor 212. When hydrogen leakage occurs in the hydrogen bottle 211, the hydrogen concentration around the hydrogen bottle group changes first. Therefore, by monitoring the hydrogen leakage through the first concentration sensor 212, the problem can be quickly discovered in the early stage of hydrogen leakage, and the user can be notified in time to perform corresponding operations.

[0075] Furthermore, a second concentration sensor 213 is also provided in the first space 210. The second concentration sensor 213 is provided inside the hydrogen bottle 211 and is used to monitor the change of the hydrogen concentration inside the hydrogen bottle 211 to obtain the second hydrogen concentration data. The second hydrogen concentration data is acquired in real time by the second concentration sensor 213, and a change curve of the second hydrogen concentration data can be obtained. By comparing the second hydrogen concentration data at the current moment with the second hydrogen concentration data at the initial moment, the total amount of hydrogen reduced in the hydrogen bottle 211, that is, the hydrogen mass change data, can be obtained. Furthermore, a leakage assessment is performed based on the hydrogen mass change data and the first hydrogen concentration data to obtain hydrogen leakage assessment data. The hydrogen leakage assessment data is used to evaluate whether a hydrogen leakage occurs in the hydrogen bottle group and to determine the severity of the hydrogen leakage.

[0076] Furthermore, the hydrogen bottle 211 in the hydrogen bottle group provides hydrogen to the stack system 221 through a high-pressure hydrogen pipeline. A flow meter can be added to the high-pressure hydrogen pipeline to monitor the process of the hydrogen bottle 211 providing hydrogen to the stack system 221, thereby obtaining hydrogen supply status data. Under normal working conditions, that is, when there is no leakage in the hydrogen bottle 211, the value of the second hydrogen concentration data should be the same as the value of the hydrogen supply status data, that is, the reduced hydrogen mass in the hydrogen bottle 211 is all used to reflect the stack system 221. When the hydrogen bottle 211 leaks, the value of the second hydrogen concentration data is greater than the value of the hydrogen supply status data, that is, in addition to supplying the stack, there are other paths in the hydrogen bottle 211 that cause hydrogen consumption. At this time, hydrogen leakage may have occurred in the hydrogen bottle 211. The difference between the second hydrogen concentration data and the hydrogen supply status data is obtained, and the obtained data is the hydrogen leakage amount of the corresponding hydrogen bottle 211.

[0077] In some embodiments, the above calculation results can also be verified by the first hydrogen concentration data. If the result obtained by subtracting the second hydrogen concentration data from the hydrogen supply state data is the same as the first hydrogen concentration data, it means that the calculation result is reliable, and the first space 210 is in a closed state. At this time, the hydrogen leakage only affects the hydrogen bottle group and the first space 210; if the result obtained by subtracting the second hydrogen concentration data from the hydrogen supply state data is greater than the first hydrogen concentration data, it means that the first space 210 is faulty and not in a closed state, and the hydrogen leaked from the hydrogen bottle 211 to the first space 210 leaks from the first space 210 to the outside of the container 200 through other paths, which brings greater risks to the external environment and requires further corresponding processing.

[0078] In some embodiments, the hydrogen leakage situation is evaluated according to the first hydrogen concentration data, the second hydrogen concentration data and the hydrogen supply state data to obtain hydrogen leakage assessment data, wherein the hydrogen leakage assessment data is the weighted result of multiple data scores, and the data scores include the hydrogen bottle 211 leakage score and the space leakage score. Exemplarily, the hydrogen bottle 211 leakage score is set according to the value of the first hydrogen concentration data. The larger the first hydrogen concentration data, the higher the hydrogen bottle 211 leakage score; the space leakage score is determined based on the second hydrogen concentration data and the hydrogen supply state data, indicating the leakage situation of the first space 210. The greater the difference between the second hydrogen concentration data and the hydrogen supply state data and the first hydrogen concentration data, the higher the space leakage score. Different weight coefficients are set for the hydrogen bottle 211 leakage score and the space leakage score, and the hydrogen leakage assessment data is obtained by weighted calculation. It can be understood that the larger the value of the hydrogen leakage assessment data, the greater the impact that the hydrogen leakage may cause, that is, the greater the risk level.

[0079] Furthermore, when hydrogen is stored in the hydrogen bottle 211, it is usually stored in a high-pressure compression method. During the leakage process of the hydrogen stored in this way, due to the low external pressure, the leaked hydrogen will expand and absorb the heat of the surrounding environment, resulting in a decrease in the ambient temperature. Therefore, it can be seen that the ambient temperature is related to the scope of hydrogen leakage, reflecting the diffusion range of hydrogen leaked from the hydrogen bottle 211. The first imaging sensor 214 is used to detect the temperature of the first space 210 to obtain the first temperature distribution data, wherein the type of the first imaging sensor 214 includes but is not limited to: infrared thermal imaging camera, thermocouple array and thermal imaging sensor. The first temperature distribution data reflects the temperature distribution in the first space 210, and the scope of hydrogen leakage can be determined by the first temperature distribution data. Within the diffusion range of the leaked hydrogen, hydrogen and air are mixed in a certain proportion to form an explosive mixture. The larger the diffusion range of the leaked hydrogen, the larger the range of explosion risk. Therefore, during the detection process, it is necessary to determine the diffusion range of the leaked hydrogen to comprehensively evaluate the hydrogen leakage.

[0080] Furthermore, the above-mentioned evaluation results, including the first hydrogen concentration data, the hydrogen leakage evaluation data and the first temperature distribution data, can be combined to determine the hydrogen leakage situation in the first space 210. Among them, the first hydrogen concentration data is used to reflect the hydrogen concentration in the first space 210 in the early stage of hydrogen leakage, and quickly discover the hydrogen leakage problem; the hydrogen leakage evaluation data is obtained by comparing the second hydrogen concentration data representing the change of hydrogen concentration in the hydrogen bottle 211 with the first hydrogen concentration data on the basis of the first hydrogen concentration data, and is used to determine the specific hydrogen bottle 211 and its number where the leakage occurs; the first temperature distribution data is used to evaluate the diffusion level of hydrogen in the first space 210 after the hydrogen leakage occurs, so as to further evaluate the severity of the hydrogen leakage, thereby determining the corresponding risk level, and then performing subsequent emergency operations.

[0081] It is understandable that the above steps can be performed on any hydrogen bottle 211, so the method can locate the hydrogen bottle 211 where hydrogen leakage occurs, thereby providing information for subsequent emergency operations and maintenance.

[0082] The hydrogen leakage monitoring method provided in the present embodiment monitors the hydrogen concentration change data in the first space 210 of the hydrogen storage system 202 and the hydrogen mass change data in the hydrogen bottle 211, and evaluates the hydrogen leakage situation of the hydrogen bottle 211 and the first space 210 according to the relationship between the change data; at the same time, the temperature distribution is used as auxiliary data to analyze the diffusion degree of the leaked hydrogen in the first space 210, so that the user can fully grasp the hydrogen leakage information, improve the accuracy and reliability of data analysis, and thus perform targeted emergency operations according to the specific risk level, so as to achieve more comprehensive safety management of the hydrogen storage system 202.

[0083] As an embodiment of the present application, the first imaging sensor 214 detects the temperature of the first space 210 to obtain first temperature distribution data, including:

[0084] S510. If the hydrogen leakage assessment data exceeds the preset leakage assessment threshold, the first imaging sensor 214 is used to detect the temperature of the first space 210 to obtain first temperature distribution data.

[0085] Specifically, if the hydrogen leakage assessment data exceeds the preset leakage assessment threshold, it indicates that the hydrogen leakage is serious and the mass of the leaked hydrogen is large, which may bring safety hazards to the container 200 and the fuel cell vehicle. At this time, simply measuring the hydrogen concentration cannot fully grasp the hydrogen leakage situation, so it is necessary to use the first imaging sensor 214 to perform temperature detection on the first space 210, so as to determine the diffusion range of the leaked hydrogen, so as to comprehensively evaluate the hydrogen leakage situation.

[0086] In some embodiments, by determining the diffusion range of the leaked hydrogen, the flow state of the leaked hydrogen in the first space 210 can be determined, thereby locating the hydrogen leakage point on the hydrogen bottle 211 and the leakage point on the wall of the first space 210, providing effective information for subsequent maintenance.

[0087] Reference Figure 4 , Figure 4 This is a step diagram for determining the hydrogen leakage situation in the first space 210 in an embodiment of the present application. As shown in the figure, as an embodiment of the present application, determining the hydrogen leakage situation in the first space 210 according to the first hydrogen concentration data, the hydrogen leakage assessment data and the first temperature distribution data includes:

[0088] S610. If the hydrogen leakage assessment data exceeds a preset leakage assessment threshold, a hydrogen distribution heat map corresponding to the first space 210 is generated according to the first hydrogen concentration data and the first temperature distribution data.

[0089] S620. Determine the hydrogen leakage situation in the first space 210 according to the hydrogen distribution heat map.

[0090] Specifically, when the leaked hydrogen diffuses in the first space 210, the temperature in the diffusion area will decrease, so the first temperature distribution data in the first space 210 characterizes the diffusion range of the leaked hydrogen. At the same time, the first hydrogen concentration data includes the hydrogen concentrations at different positions in the first space 210, and the hydrogen concentration distribution field in the first space 210 can be obtained through a plurality of first hydrogen concentration data. By combining the first temperature distribution data in the first space 210 with the hydrogen concentration distribution field, a hydrogen distribution heat map corresponding to the first space 210 can be obtained to indicate the diffusion range of the leaked hydrogen, thereby determining the hydrogen leakage situation in the first space 210.

[0091] Reference Figure 5 , Figure 5 This is a step diagram for generating a hydrogen distribution heat map in an embodiment of the present application. As shown in the figure, as an embodiment of the present application, a hydrogen distribution heat map corresponding to the first space 210 is generated according to the first hydrogen concentration data and the first temperature distribution data, including:

[0092] S612. Perform feature extraction on the first hydrogen concentration data to obtain first concentration feature data.

[0093] S614. Perform feature extraction on the first temperature distribution data to obtain first distribution feature data.

[0094] S618. Generate a hydrogen distribution heat map corresponding to the first space 210 according to the fusion result between the first concentration characteristic data and the first distribution characteristic data.

[0095] Specifically, the first concentration characteristic data includes the mean, standard deviation and gradient of the hydrogen concentration. The first hydrogen concentration data includes the hydrogen concentrations at different positions in the first space 210, and there are differences between the first hydrogen concentration data due to different diffusion speeds and directions. Each point at which the first hydrogen concentration data is measured is taken as a measurement point, and the standard deviation of the first hydrogen concentration data is first calculated. The two measurement points with a standard deviation less than a threshold are taken as approximate concentration points, thereby obtaining multiple groups of approximate concentration points; the approximate concentration points in the same group are averaged to obtain the average hydrogen concentration of the group, thereby dividing the first concentration characteristic data into multiple discrete hydrogen concentration levels to determine the diffusion range and concentration distribution of the leaked hydrogen.

[0096] Furthermore, between different hydrogen concentration levels, the concentration gradient of hydrogen concentration is obtained according to the distance. The concentration gradient indicates the diffusion speed of leaked hydrogen. The larger the concentration gradient, the faster the diffusion speed of leaked hydrogen; the smaller the concentration gradient, the slower the diffusion speed of leaked hydrogen. By determining the diffusion speed of leaked hydrogen through the concentration gradient, the diffusion direction of leaked hydrogen can be further predicted. It can be understood that leaked hydrogen tends to diffuse in the direction with a large concentration gradient.

[0097] Specifically, the first temperature distribution data is an image of the temperature distribution in the first space 210 obtained by the first imaging sensor 214, in which different temperature distributions are divided by isotherms. Therefore, by performing feature extraction on the first temperature distribution data, the obtained first distribution feature data can reflect the characteristics of the temperature distribution in the first space 210.

[0098] Furthermore, the first concentration characteristic data and the first distribution characteristic data are fused and processed, and by comparing the similarities and differences between the two characteristic data, a specific diffusion range and concentration distribution of the leaked hydrogen are obtained, and a hydrogen distribution heat map corresponding to the first space 210 is generated. It can be understood that the hydrogen distribution heat map includes the temperature gradient in the first space 210. The larger the temperature gradient, the faster the diffusion speed of the leaked hydrogen, so the diffusion direction of the leaked hydrogen can be predicted. After obtaining the diffusion direction obtained according to the concentration gradient and the temperature gradient, the two are compared and fused to improve the accuracy of the diffusion direction prediction.

[0099] In some embodiments, a gas diffusion model is established to simulate the diffusion process of the leaked hydrogen in the first space 210, and the simulation result is corrected according to the first hydrogen concentration data and the first temperature distribution data, so as to obtain a more accurate diffusion range of the leaked hydrogen. Exemplarily, the gas diffusion model includes but is not limited to: Fick's law, Gaussian diffusion model, Lagrangian particle model and computational fluid dynamics model.

[0100] Reference Figure 6 , Figure 6 This is a step diagram for obtaining the first distribution characteristic data in an embodiment of the present application. As shown in the figure, as an embodiment of the present application, the first distribution characteristic data includes hydrogen diffusion edge and temperature gradient data; feature extraction is performed on the first temperature distribution data to obtain the first distribution characteristic data, including:

[0101] S615. Preprocess the first temperature distribution data; wherein the preprocessing includes at least one of denoising, contrast enhancement and normalization.

[0102] S616. Perform edge detection on the first temperature distribution data using an edge detection algorithm to obtain a hydrogen diffusion edge.

[0103] S617. Perform gradient calculation on the first temperature distribution data to obtain temperature gradient data.

[0104] Specifically, the temperature variation in the first space 210 caused by the leakage of hydrogen may be small, resulting in a low contrast of the first temperature distribution data, and no obvious characteristic data can be obtained. Therefore, the image needs to be preprocessed before obtaining the first distribution characteristic data. The preprocessing includes at least one of denoising, contrast enhancement and normalization, wherein denoising includes removing noise in the first temperature distribution data by filtering technology to improve the accuracy of the image data; the method of contrast enhancement includes stretching contrast and histogram equalization, and the temperature variation in the first temperature distribution data is enhanced by contrast enhancement, so that the temperature variation and the temperature abnormality area can be accurately identified; normalization is to normalize the first temperature distribution data to the same data range, so as to better reflect the temperature variation and facilitate the comparison of the temperature distribution.

[0105] Further, refer to Figure 7 , Figure 7 This is a top view of the first space 210 when a hydrogen leak occurs in the embodiment of the present application. As shown in the figure, the first imaging sensor 214 is arranged at the top of the first space 210, and the imaging direction is facing directly downward, that is, facing the hydrogen bottle 211 in the hydrogen bottle group. Exemplarily, when hydrogen leaks from the bottle mouth of the hydrogen bottle 211, the leaked hydrogen forms a leaked hydrogen cloud 400 at the leaking position, that is, the diffusion range of the leaked hydrogen. The leaked hydrogen cloud 400 gradually increases with time, which affects the temperature in the first space 210. By performing edge detection on the first temperature distribution data, the range of the leaked hydrogen cloud 400, that is, the hydrogen diffusion edge, can be obtained.

[0106] Furthermore, edge detection algorithms include Canny operator and Sobel operator, among which Canny edge detection operator is a multi-level edge detection algorithm developed by John F. Canny in 1986; Sobel operator is an important processing method in the field of computer vision, mainly used to obtain the first-order gradient of digital images, and its common application and physical meaning is edge detection. The Sobel operator is a weighted difference of the grayscale values ​​of the four areas of up, down, left and right of each pixel in the image, reaching an extreme value at the edge to detect the edge. It can be understood that since the leaked hydrogen will cause the temperature in the first space 210 to drop, the temperature drop is proportional to the concentration of the leaked hydrogen. Therefore, by identifying the edge of the first temperature distribution data, the diffusion range and concentration distribution of the leaked hydrogen can be obtained.

[0107] Further, on the basis of obtaining the diffusion range and concentration distribution of the leaked hydrogen, the temperature gradient data is obtained by performing gradient calculation on the first temperature distribution data, which is used to represent the temperature change trend in the diffusion range of the leaked hydrogen. It can be understood that the effect of the leaked hydrogen on the temperature change in the first space 210 has a certain hysteresis, so the larger the value of the temperature gradient data, the faster the diffusion speed of the leaked hydrogen here; the smaller the value of the temperature gradient data, the slower the diffusion speed of the leaked hydrogen here.

[0108] As an embodiment of the present application, a second imaging sensor 222 is deployed in the second space 220; the method further includes:

[0109] S710. Perform temperature detection on the second space 220 through the second imaging sensor 222 to obtain second temperature distribution data.

[0110] S720. Determine the hydrogen leakage situation in the second space 220 according to the second temperature distribution data.

[0111] Specifically, when the fuel cell vehicle is operating normally, the first space 210 and the second space 220 are both in a sealed state, so the hydrogen leakage in the first space 210 generally does not affect the second space 220. If both the first space 210 and the second space 220 are damaged, the hydrogen leaked in the first space 210 will enter the second space 220, thereby affecting the second space 220. In order to cope with the above situation, a second imaging sensor 222 is provided in the second space 220 to detect the temperature of the second space 220 and obtain second temperature distribution data, so as to determine the hydrogen leakage in the second space 220 according to the second temperature distribution data. It can be understood that the method for determining the hydrogen leakage in the second space 220 according to the second temperature distribution data is the same as the method for determining the hydrogen leakage in the first space 210 according to the first temperature distribution data.

[0112] As an embodiment of the present application, the method further includes:

[0113] S730. If the hydrogen leakage assessment data exceeds the preset leakage assessment threshold, determine the current operating state of the fuel cell vehicle.

[0114] S740. Determine the current risk level of the fuel cell vehicle according to the current operating state of the fuel cell vehicle, the hydrogen leakage in the first space 210, and the hydrogen leakage in the second space 220.

[0115] Specifically, the operating states of the fuel cell vehicle include stationary, normal driving, supplying power to an external load, and stopping working due to a fault. In the case of hydrogen leakage in the first space 210 or the second space 220, when the fuel cell vehicle is stationary or stops working due to a fault, the hydrogen leakage has a smaller impact on the safety of the fuel cell vehicle, so the corresponding current risk level is lower than other operating states; when the fuel cell vehicle is driving normally, since the hydrogen fuel cell system 201 therein is not in operation, the corresponding current risk level is lower than the operating state of supplying power to an external load; when the fuel cell vehicle supplies power to an external load, the hydrogen fuel cell system 201 is working at this time, and a certain amount of heat will be generated in the stack system 221. If hydrogen leakage occurs at this time, the high temperature may cause the hydrogen fuel cell system 201 to burn or explode, so the corresponding current risk level is the highest.

[0116] For example, when the first hydrogen concentration does not exceed the preset leakage assessment threshold, the risk level is set to level 1; when the first hydrogen concentration exceeds the preset leakage assessment threshold, the current risk level is determined according to the current operating state of the fuel cell vehicle. If the fuel cell vehicle is stationary or stops working due to a fault, the risk level is set to level 2; if the fuel cell vehicle is running normally, the risk level is set to level 3; if the fuel cell vehicle supplies power to an external load, the risk level is set to level 4. It is understandable that the higher the risk level, the greater the risk of hydrogen leakage.

[0117] As an embodiment of the present application, different risk levels correspond to different warning methods; the method further includes:

[0118] S800. Trigger an early warning method corresponding to the current risk level to initiate a management strategy corresponding to the current risk level to perform emergency management on the fuel cell vehicle.

[0119] Specifically, for the first-level risk level, the air intake and exhaust system 206 in the fuel cell vehicle can be started and the first space 210 can be opened, so that the leaked hydrogen in the first space 210 can be discharged from the fuel cell vehicle through the air intake and exhaust system 206; accordingly, if hydrogen leakage also occurs in the second space 220, the second space 220 is also opened. For the second-level risk level and above, opening the air intake and exhaust system 206 at this time may cause the combustion or explosion of the leaked hydrogen. The first space 210 can be opened to dilute the leaked hydrogen through the flow of external air. When the first hydrogen concentration decreases, the air intake and exhaust system 206 is opened to discharge the leaked hydrogen in the first space 210 from the fuel cell vehicle; at the same time, the hydrogen leakage at the second-level risk level and above is recorded, and the relevant technical personnel are notified for subsequent inspection and maintenance. In other embodiments, the specific management strategy can be set according to the actual situation.

[0120] Accordingly, refer to Figure 8 The embodiment of the present application provides a hydrogen leakage monitoring device, which is applied to a fuel cell vehicle. The fuel cell vehicle includes a container, and a first space 210 for placing a hydrogen supply system and a second space 220 for placing a stack system 221 are provided in the container. The hydrogen supply system includes a hydrogen bottle group, and the hydrogen bottle group provides hydrogen to the stack system 221. A first concentration sensor 212 and a first imaging sensor 214 are deployed in the first space 210, and a second concentration sensor 213 is provided in the hydrogen bottle 211 of the hydrogen bottle group; the device includes:

[0121] The first concentration monitoring module 301 is used to monitor the hydrogen concentration of the first space 210 through the first concentration sensor 212 to obtain first hydrogen concentration data.

[0122] The second concentration monitoring module 302 is used to monitor the hydrogen concentration in the hydrogen bottle 211 through the second concentration sensor 213 to obtain second hydrogen concentration data.

[0123] The hydrogen leakage assessment module 303 is used to perform leakage assessment based on the second hydrogen concentration data, the first hydrogen concentration data and the hydrogen supply status data of the hydrogen bottle group to the fuel cell system 221 to obtain hydrogen leakage assessment data.

[0124] The first temperature detection module 304 is used to detect the temperature of the first space 210 through the first imaging sensor 214 to obtain first temperature distribution data.

[0125] The leakage situation determination module 305 is used to determine the hydrogen leakage situation in the first space 210 according to the first hydrogen concentration data, the hydrogen leakage assessment data and the first temperature distribution data.

[0126] In some optional implementations, the first temperature detection module 305 includes:

[0127] The first temperature detection unit is used to detect the temperature of the first space 210. If the hydrogen leakage assessment data exceeds a preset leakage assessment threshold, the first imaging sensor 214 is used to detect the temperature of the first space 210 to obtain first temperature distribution data.

[0128] In some optional implementations, the leakage determination module 306 includes:

[0129] The distribution heat map generating unit is used to generate a hydrogen distribution heat map. If the hydrogen leakage assessment data exceeds a preset leakage assessment threshold, a hydrogen distribution heat map corresponding to the first space 210 is generated according to the first hydrogen concentration data and the first temperature distribution data.

[0130] The distribution heat map analysis unit is used to determine the hydrogen leakage situation in the first space 210 according to the hydrogen distribution heat map.

[0131] In some optional implementations, the distribution heat map generating unit includes:

[0132] The concentration feature extraction subunit is used to extract features from the first hydrogen concentration data to obtain first concentration feature data.

[0133] The distribution feature extraction subunit is used to extract features from the first temperature distribution data to obtain first distribution feature data.

[0134] The feature fusion subunit is used to generate a hydrogen distribution heat map corresponding to the first space 210 according to the fusion result between the first concentration feature data and the first distribution feature data.

[0135] In some optional implementations, the distribution feature extraction subunit includes:

[0136] A preprocessing component is used to preprocess the first temperature distribution data; wherein the preprocessing includes at least one of denoising, contrast enhancement and normalization.

[0137] The edge detection component is used to perform edge detection on the first temperature distribution data through an edge detection algorithm to obtain a hydrogen diffusion edge.

[0138] The gradient calculation component is used to perform gradient calculation on the first temperature distribution data to obtain temperature gradient data.

[0139] In some optional embodiments, a second imaging sensor 222 is disposed in the second space 220; the device further includes:

[0140] The second temperature detection unit is used to detect the temperature of the second space 220 through the second imaging sensor 222 to obtain second temperature distribution data.

[0141] The second leakage situation determining unit is used to determine the hydrogen leakage situation in the second space 220 according to the second temperature distribution data.

[0142] In some optional embodiments, the device further comprises:

[0143] The operating state determination unit is used to determine the operating state of the vehicle, and if the hydrogen leakage assessment data exceeds a preset leakage assessment threshold, determine the current operating state of the fuel cell vehicle.

[0144] The risk level determination unit is used to determine the current risk level of the fuel cell vehicle according to the current operating state of the fuel cell vehicle, the hydrogen leakage in the first space 210, and the hydrogen leakage in the second space 220.

[0145] In some optional embodiments, the device further comprises:

[0146] The emergency management module is used to trigger the early warning method corresponding to the current risk level to start the management strategy corresponding to the current risk level to perform emergency management on the fuel cell vehicle.

[0147] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0148] The hydrogen leakage monitoring device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0149] Reference Fig. 9 , Fig. 9 A schematic diagram of the structure of a computer device provided for an embodiment of the present application, as shown in the figure, the computer device includes: one or more processors 10, a memory 20, and an interface for connecting various components, including a high-speed interface and a low-speed interface. Each component uses different buses to communicate with each other, and can be installed on a common mainboard or installed in other ways as needed. The processor can process instructions executed in the computer device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Fig. 9 A processor 10 is taken as an example.

[0150] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0151] The memory 20 stores instructions executable by at least one processor 10, so that at least one processor 10 executes the method shown in the above embodiment.

[0152] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0153] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[0154] The computer device further comprises a communication interface 30 for the computer device to communicate with other devices or a communication network.

[0155] The embodiment of the present application also provides a computer-readable storage medium. The above method according to the embodiment of the present application can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0156] The embodiment of the present application provides a computer program product, which includes computer instructions, which are stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the method of any embodiment of the present application.

[0157] Although the embodiments of the present application are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations are all within the scope defined by the appended claims.

[0158] The systems, devices, modules or units described in the above embodiments may be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer.

[0159] For the convenience of description, the above device is described in various units according to their functions. Of course, when implementing the present application, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0160] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0161] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate a device for implementing the functions specified in one process or multiple processes in the flowchart and / or one box or multiple boxes in the block diagram.

[0162] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0163] These computer program instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0164] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0165] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0166] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

[0167] Although the embodiments of the present application have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for monitoring hydrogen leakage, characterized in that: Applied to a fuel cell vehicle, the fuel cell vehicle comprises a container, a first space for placing a hydrogen supply system and a second space for placing a stack system are arranged in the container, the hydrogen supply system comprises a hydrogen bottle group, the hydrogen bottle group provides hydrogen to the stack system, a first concentration sensor and a first imaging sensor are arranged in the first space, the first concentration sensor is arranged at a position close to the hydrogen bottle group, a second concentration sensor is arranged in a hydrogen bottle of the hydrogen bottle group; a second imaging sensor is arranged in the second space; the method comprises: Monitoring the hydrogen concentration in the first space by using the first concentration sensor to obtain first hydrogen concentration data; Monitoring the hydrogen concentration in the hydrogen bottle by using the second concentration sensor to obtain second hydrogen concentration data; Leakage assessment is performed according to the second hydrogen concentration data, the first hydrogen concentration data and the hydrogen supply status data of the hydrogen bottle group providing hydrogen to the fuel cell system to obtain hydrogen leakage assessment data, wherein the hydrogen leakage assessment data is a weighted result of multiple data scores, the data scores include a hydrogen bottle leakage score and a space leakage score, and the hydrogen leakage assessment data is obtained by weighted calculation of the hydrogen bottle leakage score and the space leakage score; the hydrogen bottle leakage score is a score value set at different stages according to the value of the first hydrogen concentration data; the space leakage score is jointly determined based on the second hydrogen concentration data and the hydrogen supply status data; Detecting the temperature of the first space by using the first imaging sensor to obtain first temperature distribution data; determining hydrogen leakage in the first space according to the first hydrogen concentration data, the hydrogen leakage assessment data, and the first temperature distribution data; Detecting the temperature of the second space by using the second imaging sensor to obtain second temperature distribution data; determining hydrogen leakage in the second space according to the second temperature distribution data; If the hydrogen leakage assessment data exceeds a preset leakage assessment threshold, determining a current operating state of the fuel cell vehicle; The current risk level of the fuel cell vehicle is determined according to the current operating state of the fuel cell vehicle, the hydrogen leakage in the first space, and the hydrogen leakage in the second space.

2. The method according to claim 1, characterized in that The step of detecting the temperature of the first space by using the first imaging sensor to obtain first temperature distribution data includes: If the hydrogen leakage assessment data exceeds a preset leakage assessment threshold, the first imaging sensor is used to detect the temperature of the first space to obtain the first temperature distribution data.

3. The method according to claim 1, characterized in that The determining the hydrogen leakage situation in the first space according to the first hydrogen concentration data, the hydrogen leakage assessment data and the first temperature distribution data includes: If the hydrogen leakage assessment data exceeds a preset leakage assessment threshold, generating a hydrogen distribution heat map corresponding to the first space according to the first hydrogen concentration data and the first temperature distribution data; The hydrogen leakage situation in the first space is determined according to the hydrogen distribution heat map.

4. The method according to claim 3, characterized in that The step of generating a hydrogen distribution heat map corresponding to the first space according to the first hydrogen concentration data and the first temperature distribution data includes: Performing feature extraction on the first hydrogen concentration data to obtain first concentration feature data; Performing feature extraction on the first temperature distribution data to obtain first distribution feature data; A hydrogen distribution heat map corresponding to the first space is generated according to a fusion result between the first concentration characteristic data and the first distribution characteristic data.

5. The method according to claim 4, characterized in that The first distribution characteristic data includes hydrogen diffusion edge and temperature gradient data.

6. The method according to claim 5, characterized in that The step of extracting features from the first temperature distribution data to obtain first distribution feature data includes: Preprocessing the first temperature distribution data; performing edge detection on the first temperature distribution data using an edge detection algorithm to obtain the hydrogen diffusion edge; Performing gradient calculation on the first temperature distribution data to obtain the temperature gradient data.

7. The method according to claim 6, characterized in that The preprocessing includes at least one of denoising, contrast enhancement and normalization.

8. The method according to claim 1, characterized in that: Different risk levels correspond to different early warning methods; the method also includes: The early warning method corresponding to the current risk level is triggered to start the management strategy corresponding to the current risk level to perform emergency management on the fuel cell vehicle.

9. A hydrogen leakage monitoring device, characterized in that: Applied to a fuel cell vehicle, the fuel cell vehicle comprises a container, a first space for placing a hydrogen supply system and a second space for placing a stack system are arranged in the container, the hydrogen supply system comprises a hydrogen bottle group, the hydrogen bottle group provides hydrogen to the stack system, a first concentration sensor and a first imaging sensor are arranged in the first space, the first concentration sensor is arranged at a position close to the hydrogen bottle group, a second concentration sensor is arranged in a hydrogen bottle of the hydrogen bottle group; a second imaging sensor is arranged in the second space; the device comprises: A first concentration monitoring module, configured to monitor the hydrogen concentration of the first space through the first concentration sensor to obtain first hydrogen concentration data; A second concentration monitoring module, used to monitor the hydrogen concentration in the hydrogen bottle through the second concentration sensor to obtain second hydrogen concentration data; A hydrogen leakage assessment module, configured to perform leakage assessment according to the second hydrogen concentration data, the first hydrogen concentration data and the hydrogen supply status data of the hydrogen bottle group providing hydrogen to the fuel cell system, and obtain hydrogen leakage assessment data, wherein the hydrogen leakage assessment data is a weighted result of multiple data scores, the data scores include a hydrogen bottle leakage score and a space leakage score, and the hydrogen leakage assessment data is obtained by weighted calculation of the hydrogen bottle leakage score and the space leakage score; the hydrogen bottle leakage score is a score value set at different stages according to the value of the first hydrogen concentration data; the space leakage score is determined jointly according to the second hydrogen concentration data and the hydrogen supply status data; A first temperature detection module, configured to detect the temperature of the first space by using the first imaging sensor to obtain first temperature distribution data; a leakage situation determination module, configured to determine the hydrogen leakage situation in the first space according to the first hydrogen concentration data, the hydrogen leakage assessment data and the first temperature distribution data; a second temperature detection unit, configured to detect the temperature of the second space by using the second imaging sensor to obtain second temperature distribution data; a second leakage situation determining unit, configured to determine the hydrogen leakage situation in the second space according to the second temperature distribution data; an operating state determining unit, configured to determine a current operating state of the fuel cell vehicle if the hydrogen leakage assessment data exceeds a preset leakage assessment threshold; The risk level determination unit is used to determine the current risk level of the fuel cell vehicle according to the current operating state of the fuel cell vehicle, the hydrogen leakage in the first space, and the hydrogen leakage in the second space.

10. The device according to claim 9, characterized in that The leakage determination module comprises: a distribution heat map generating unit, configured to generate a hydrogen distribution heat map, and if the hydrogen leakage assessment data exceeds a preset leakage assessment threshold, generate a hydrogen distribution heat map corresponding to the first space according to the first hydrogen concentration data and the first temperature distribution data; A distribution heat map analysis unit is used to determine the hydrogen leakage situation in the first space according to the hydrogen distribution heat map.

11. The device according to claim 10, characterized in that The distribution heat map generating unit comprises: a concentration feature extraction subunit, configured to extract features from the first hydrogen concentration data to obtain first concentration feature data; a distribution feature extraction subunit, configured to extract features from the first temperature distribution data to obtain first distribution feature data; The feature fusion subunit is used to generate a hydrogen distribution heat map corresponding to the first space according to a fusion result between the first concentration feature data and the first distribution feature data.

12. A fuel cell vehicle, characterized in that: The fuel cell vehicle includes an electric vehicle chassis and a container, wherein the container includes a hydrogen fuel cell system, a hydrogen storage system, a buffer lithium battery system, a power inverter system, an air conditioning system and an air intake and exhaust system, wherein the hydrogen storage system executes the method described in any one of claims 1 to 8 to perform hydrogen leakage monitoring.

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