Hydrogen leakage detection method and target fuel cell engine

Abstract

The invention discloses a hydrogen leakage detection method and a target fuel cell engine. According to the scheme, the method comprises the steps that a TBOX judges whether a preset condition is met or not, if the preset condition is met, an FCU is awakened, and a first hydrogen leakage detection request is sent to the FCU; after the first hydrogen leakage detection request is received, the FCU controls a plurality of preset hydrogen concentration sensors to collect nearby hydrogen concentration values; the FCU determines a hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to the plurality of hydrogen concentration values corresponding to each preset hydrogen concentration sensor; when the hydrogen concentration change trend corresponding to the preset hydrogen concentration sensor is that hydrogen leakage hidden danger exists, the FCU sends early warning information to the TBOX and enters a dormant state; and the TBOX sends early warning information to the target terminal equipment so as to prompt that the target fuel cell engine has the hydrogen leakage hidden danger and needs to be maintained in time.

Description

Technical Field

[0001] The present application relates to the technical field of fuel cell vehicles, and in particular to a hydrogen leakage detection method and a target fuel cell engine. Background Art

[0002] In recent years, with the continuous development of society, people's living standards have been continuously improved, and people's demand for cars has also increased. Due to the increasingly serious energy shortage and environmental pollution caused by traditional cars, fuel cell vehicles using hydrogen as fuel have come into being. Fuel cell vehicles convert the chemical energy of hydrogen into electrical energy through fuel cell engines to provide power for the entire vehicle, with the advantages of high efficiency and environmental protection. However, hydrogen is a highly flammable and explosive gas. When hydrogen leaks in a fuel cell engine, the fuel cell engine is extremely easy to burn and explode. Therefore, it is necessary to perform hydrogen leak detection on the fuel cell engine to improve the safety of fuel cell vehicles.

[0003] At present, it is usually the staff who pre-sets the hydrogen concentration value corresponding to the fuel cell engine based on experience (i.e., the preset hydrogen concentration threshold). During the operation of the fuel cell vehicle, the hydrogen concentration values ​​at various locations in the fuel cell engine are collected by multiple preset hydrogen concentration sensors pre-installed in the fuel cell engine, and the collected hydrogen concentration values ​​are sent to the FCU (Fuel cell Control Unit, fuel cell engine main controller) in the fuel cell engine. When the hydrogen concentration value collected by a preset hydrogen concentration sensor is greater than the preset hydrogen concentration threshold, the FCU controls the fuel cell engine to stop working and sends an alarm message to the VCU (Vehicle Control Unit, vehicle controller) so that the VCU can sound an alarm through the central control screen. Therefore, the existing hydrogen leakage detection method can only perform hydrogen leakage detection on the fuel cell engine during the operation of the fuel cell vehicle. After the fuel cell vehicle stops running and is powered off, the fuel cell engine will not be tested for hydrogen leakage, thereby failing to effectively ensure the safety of the fuel cell vehicle after it is powered off. Summary of the invention

[0004] The present disclosure provides a hydrogen leakage detection method and a target fuel cell engine, the main purpose of which is to solve the problem that the existing hydrogen leakage detection method can only perform hydrogen leakage detection on the fuel cell engine during the operation of the fuel cell vehicle, and will not perform hydrogen leakage detection on the fuel cell engine after the fuel cell vehicle stops running and is powered off, thereby failing to effectively ensure the safety of the fuel cell vehicle after power is off.

[0005] The first aspect of the present disclosure provides a hydrogen leakage detection method, which is applied to a target fuel cell vehicle, the target fuel cell vehicle is in a power-off state, the target fuel cell vehicle includes a target fuel cell engine, the target fuel cell engine includes a fuel cell engine main controller FCU, a vehicle-mounted terminal TBOX, and multiple preset hydrogen concentration sensors, the method comprising:

[0006] TBOX determines whether the preset condition is met, and if so, wakes up the FCU and sends a first hydrogen leak detection request to the FCU;

[0007] After being awakened and receiving the first hydrogen leak detection request, the FCU awakens a plurality of preset hydrogen concentration sensors and controls the plurality of preset hydrogen concentration sensors to collect nearby hydrogen concentration values;

[0008] The FCU receives the collected data sent by each preset hydrogen concentration sensor, wherein the collected data corresponding to the preset hydrogen concentration sensor includes a unique identifier corresponding to the preset hydrogen concentration sensor and a plurality of hydrogen concentration values ​​continuously collected by the preset hydrogen concentration sensor;

[0009] The FCU determines the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to each preset hydrogen concentration sensor;

[0010] When the hydrogen concentration change trend corresponding to one or more preset hydrogen concentration sensors indicates that there is a potential hydrogen leakage, and the hydrogen concentration change trend corresponding to the remaining preset hydrogen concentration sensors indicates that there is no hydrogen leakage, the FCU sends an early warning message to the TBOX and enters a dormant state, wherein the early warning message includes a unique identifier corresponding to each preset hydrogen concentration sensor whose hydrogen concentration change trend indicates that there is a potential hydrogen leakage;

[0011] TBOX sends warning information to the target terminal device to remind the target fuel cell engine that there is a risk of hydrogen leakage and that timely maintenance is required.

[0012] In some embodiments, the FCU determines the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to each preset hydrogen concentration sensor, including:

[0013] The FCU inputs a plurality of hydrogen concentration values ​​corresponding to the preset hydrogen concentration sensors into the hydrogen leakage detection model, so that the hydrogen leakage detection model outputs the hydrogen concentration variation trend corresponding to the preset hydrogen concentration sensors.

[0014] In some embodiments, the collected data corresponding to the preset hydrogen concentration sensor further includes the collection time corresponding to each hydrogen concentration value; the FCU determines the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to each preset hydrogen concentration sensor, including:

[0015] The FCU calculates the hydrogen concentration change rate and the average hydrogen concentration value corresponding to the preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to the preset hydrogen concentration sensor and the collection time corresponding to each hydrogen concentration value; when the hydrogen concentration change rate is less than the first preset change rate threshold, and the average hydrogen concentration value is less than the historical average hydrogen concentration value corresponding to the preset hydrogen concentration sensor, it is determined that the hydrogen concentration change trend corresponding to the preset hydrogen concentration sensor is no hydrogen leakage; when the hydrogen concentration change rate is greater than or equal to the first preset change rate threshold and the hydrogen concentration change rate is less than the second preset change rate threshold, or the average hydrogen concentration value is greater than or equal to the historical average hydrogen concentration value and the average hydrogen concentration value is less than the sum of the historical average hydrogen concentration value and the target concentration value, it is determined that the hydrogen concentration change trend corresponding to the preset hydrogen concentration sensor is that there is a potential hydrogen leakage; when the hydrogen concentration change rate is greater than the second preset change rate threshold, or the average hydrogen concentration value is greater than the sum of the historical average hydrogen concentration value and the target concentration value, it is determined that the hydrogen concentration change trend corresponding to the preset hydrogen concentration sensor is about to occur hydrogen leakage.

[0016] In some embodiments, the collected data corresponding to the preset hydrogen concentration sensor further includes the collection time corresponding to each hydrogen concentration value; the FCU determines the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to each preset hydrogen concentration sensor, including:

[0017] The FCU sends a second hydrogen leak detection request to the TBOX, which carries a unique identifier corresponding to each preset hydrogen concentration sensor, a plurality of hydrogen concentration values, and a collection time corresponding to each hydrogen concentration value;

[0018] TBOX sends the second hydrogen leakage detection request to the cloud platform, so that the cloud platform determines the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to each preset hydrogen concentration sensor and the collection time corresponding to each hydrogen concentration value, so as to obtain the hydrogen leakage detection result corresponding to the target fuel cell vehicle, wherein the hydrogen leakage detection result includes the unique identifier corresponding to each preset hydrogen concentration sensor and the hydrogen concentration change trend;

[0019] TBOX receives the hydrogen leakage detection results sent by the cloud platform and sends them to FCU;

[0020] The FCU determines the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to the hydrogen leakage detection result.

[0021] In some embodiments, the method further comprises:

[0022] The FCU obtains a training sample set, wherein the training sample set includes a plurality of first training samples, a plurality of second training samples, and a plurality of third training samples. For any first training sample, the first training sample includes a plurality of first sample hydrogen concentration values ​​and a first hydrogen concentration change trend. The plurality of first sample hydrogen concentration values ​​are a plurality of hydrogen concentration values ​​collected when there is no hydrogen leakage in the sample fuel cell engine, and the first hydrogen concentration change trend is no hydrogen leakage. For any second training sample, the second training sample includes a plurality of second sample hydrogen concentration values ​​and a second hydrogen concentration change trend. The plurality of second sample hydrogen concentration values ​​are a plurality of hydrogen concentration values ​​collected when there is a hydrogen leakage risk in the sample fuel cell engine, and the second hydrogen concentration change trend is that there is a hydrogen leakage risk. For any third training sample, the third training sample includes multiple third sample hydrogen concentration values ​​and a third hydrogen concentration change trend, the multiple third sample hydrogen concentration values ​​are multiple hydrogen concentration values ​​collected when the sample fuel cell engine is about to leak hydrogen, and the third hydrogen concentration change trend is that a hydrogen leak is about to occur; the preset deep learning model is iteratively trained based on the training sample set; wherein, after each round of training, it is determined whether the loss function of the preset deep learning model converges; if the loss function converges, the preset deep learning model obtained after this round of training is determined as the hydrogen leak detection model; if the loss function does not converge, the model parameters of the preset deep learning model are optimized and adjusted according to the loss function, and the next round of training is entered based on the optimized and adjusted preset deep learning model.

[0023] In some embodiments, the method further comprises:

[0024] When the hydrogen concentration change trend corresponding to any preset hydrogen concentration sensor indicates that hydrogen leakage is about to occur, the FCU sends an alarm message to the TBOX and enters a dormant state, wherein the alarm message contains a unique identifier corresponding to the preset hydrogen concentration sensor whose hydrogen concentration change trend indicates that hydrogen leakage is about to occur;

[0025] TBOX sends an alarm message to the target terminal device to inform the target fuel cell engine that hydrogen leakage is about to occur and timely maintenance is required.

[0026] In some embodiments, the target fuel cell vehicle also includes a low-voltage battery; the preset condition is that the timing duration of the timer corresponding to the TBOX is greater than the preset duration, and the current remaining power corresponding to the low-voltage battery is greater than the preset remaining power threshold.

[0027] A second aspect of the present disclosure provides a target fuel cell engine, the target fuel cell engine is applied to a target fuel cell vehicle, the target fuel cell vehicle is in a power-off state, the target fuel cell engine comprises: a fuel cell engine main controller FCU, a vehicle-mounted terminal TBOX, and a plurality of preset hydrogen concentration sensors;

[0028] TBOX is used to determine whether the preset conditions are met. If the preset conditions are met, the FCU is awakened and a first hydrogen leak detection request is sent to the FCU;

[0029] The FCU is used to wake up multiple preset hydrogen concentration sensors after being awakened and receiving a first hydrogen leakage detection request, and control the multiple preset hydrogen concentration sensors to collect nearby hydrogen concentration values; receive the collected data sent by each preset hydrogen concentration sensor, wherein the collected data corresponding to the preset hydrogen concentration sensor includes a unique identifier corresponding to the preset hydrogen concentration sensor and multiple hydrogen concentration values ​​continuously collected by the preset hydrogen concentration sensor; determine the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to each preset hydrogen concentration sensor; when the hydrogen concentration change trend corresponding to one or more preset hydrogen concentration sensors indicates that there is a potential hydrogen leakage, and the hydrogen concentration change trend corresponding to the remaining preset hydrogen concentration sensors indicates that there is no hydrogen leakage, send an early warning message to the TBOX and enter a dormant state, wherein the early warning message includes a unique identifier corresponding to each preset hydrogen concentration sensor whose hydrogen concentration change trend indicates that there is a potential hydrogen leakage;

[0030] TBOX is also used to send early warning information to the target terminal device to remind the target fuel cell engine that there is a risk of hydrogen leakage and that timely maintenance is required.

[0031] In some embodiments, the FCU is specifically configured to input a plurality of hydrogen concentration values ​​corresponding to the preset hydrogen concentration sensors into the hydrogen leakage detection model, so that the hydrogen leakage detection model outputs the hydrogen concentration variation trend corresponding to the preset hydrogen concentration sensors.

[0032] In some embodiments, the collected data corresponding to the preset hydrogen concentration sensor also includes the collection time corresponding to each hydrogen concentration value; the FCU is specifically used to calculate the hydrogen concentration change rate and the average hydrogen concentration value corresponding to the preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to the preset hydrogen concentration sensor and the collection time corresponding to each hydrogen concentration value; when the hydrogen concentration change rate is less than the first preset change rate threshold, and the average hydrogen concentration value is less than the historical average hydrogen concentration value corresponding to the preset hydrogen concentration sensor, it is determined that the hydrogen concentration change trend corresponding to the preset hydrogen concentration sensor is no hydrogen leakage; when the hydrogen concentration When the change rate is greater than or equal to the first preset change rate threshold and the hydrogen concentration change rate is less than the second preset change rate threshold, or the average hydrogen concentration value is greater than or equal to the historical average hydrogen concentration value and the average hydrogen concentration value is less than the sum of the historical average hydrogen concentration value and the target concentration value, it is determined that the hydrogen concentration change trend corresponding to the preset hydrogen concentration sensor is that there is a risk of hydrogen leakage; when the hydrogen concentration change rate is greater than the second preset change rate threshold, or the average hydrogen concentration value is greater than the sum of the historical average hydrogen concentration value and the target concentration value, it is determined that the hydrogen concentration change trend corresponding to the preset hydrogen concentration sensor is that a hydrogen leakage is about to occur.

[0033] In some embodiments, the collected data corresponding to the preset hydrogen concentration sensor further includes the collection time corresponding to each hydrogen concentration value;

[0034] The FCU is further used to send a second hydrogen leakage detection request carrying a unique identifier corresponding to each preset hydrogen concentration sensor, a plurality of hydrogen concentration values ​​and a collection time corresponding to each hydrogen concentration value to the TBOX;

[0035] TBOX is further used to send a second hydrogen leakage detection request to the cloud platform, so that the cloud platform can determine the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to each preset hydrogen concentration sensor and the acquisition time corresponding to each hydrogen concentration value, so as to obtain the hydrogen leakage detection result corresponding to the target fuel cell vehicle, wherein the hydrogen leakage detection result includes the unique identifier corresponding to each preset hydrogen concentration sensor and the hydrogen concentration change trend; receive the hydrogen leakage detection result sent by the cloud platform, and send the hydrogen leakage detection result to the FCU;

[0036] The FCU is also used to determine the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to the hydrogen leakage detection result.

[0037] In some embodiments, the FCU is further used to obtain a training sample set, wherein the training sample set includes a plurality of first training samples, a plurality of second training samples, and a plurality of third training samples. For any first training sample, the first training sample includes a plurality of first sample hydrogen concentration values ​​and a first hydrogen concentration change trend. The plurality of first sample hydrogen concentration values ​​are a plurality of hydrogen concentration values ​​collected when there is no hydrogen leakage in the sample fuel cell engine, and the first hydrogen concentration change trend is no hydrogen leakage. For any second training sample, the second training sample includes a plurality of second sample hydrogen concentration values ​​and a second hydrogen concentration change trend. The plurality of second sample hydrogen concentration values ​​are a plurality of hydrogen concentration values ​​collected when there is a hydrogen leakage risk in the sample fuel cell engine, and the second hydrogen concentration change trend is the presence of hydrogen leakage. Leakage hazard, for any third training sample, the third training sample includes multiple third sample hydrogen concentration values ​​and a third hydrogen concentration change trend, the multiple third sample hydrogen concentration values ​​are multiple hydrogen concentration values ​​collected when the sample fuel cell engine is about to leak hydrogen, and the third hydrogen concentration change trend is that a hydrogen leakage is about to occur; the preset deep learning model is iteratively trained based on the training sample set; wherein, after each round of training, it is determined whether the loss function of the preset deep learning model converges; if the loss function converges, the preset deep learning model obtained after this round of training is determined as the hydrogen leakage detection model; if the loss function does not converge, the model parameters of the preset deep learning model are optimized and adjusted according to the loss function, and the next round of training is entered based on the optimized and adjusted preset deep learning model.

[0038] In some embodiments, the FCU is further configured to send an alarm message to the TBOX and enter a dormant state when the hydrogen concentration change trend corresponding to any preset hydrogen concentration sensor indicates that a hydrogen leak is about to occur, wherein the alarm message includes a unique identifier corresponding to the preset hydrogen concentration sensor whose hydrogen concentration change trend indicates that a hydrogen leak is about to occur;

[0039] TBOX is also used to send alarm information to the target terminal device to inform the target fuel cell engine that hydrogen leakage is about to occur and timely maintenance is required.

[0040] In some embodiments, the target fuel cell vehicle also includes a low-voltage battery; the preset condition is that the timing duration of the timer corresponding to the TBOX is greater than the preset duration, and the current remaining power corresponding to the low-voltage battery is greater than the preset remaining power threshold.

[0041] A third aspect of the present disclosure provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the above hydrogen leakage detection method is implemented.

[0042] A fourth aspect of the present disclosure provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the above hydrogen leakage detection method when executed by the processor.

[0043] By means of the above technical solution, the technical solution provided by the present disclosure has at least the following advantages:

[0044] The present invention provides a hydrogen leakage detection method and a target fuel cell engine.

[0045] After TBOX determines that the preset conditions are met, wakes up the FCU, and sends the first hydrogen leak detection request to the FCU,

[0046] The FCU wakes up multiple preset hydrogen concentration sensors and controls the multiple preset hydrogen concentration sensors to collect nearby hydrogen concentration values; after receiving the collected data sent by each preset hydrogen concentration sensor (i.e., the unique identifier corresponding to the preset hydrogen concentration sensor and the multiple hydrogen concentration values ​​collected continuously), the FCU determines the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to each preset hydrogen concentration sensor; when the hydrogen concentration change trend corresponding to one or several preset hydrogen concentration sensors indicates that there is a hydrogen leakage hazard, and the hydrogen concentration change trend corresponding to the remaining preset hydrogen concentration sensors indicates that there is no hydrogen leakage, the FCU sends an early warning message to the TBOX, and the TBOX sends the early warning message to the target terminal device to remind the owner of the target fuel cell vehicle that the target fuel cell engine has a hydrogen leakage hazard and needs to be repaired in time. In the present disclosure, after the target fuel cell vehicle stops running and is powered off, a hydrogen leakage detection can be performed on the target fuel cell engine, thereby effectively ensuring the safety of the fuel cell vehicle after being powered off; and, since the hydrogen leakage detection is performed based on a plurality of hydrogen concentration values ​​continuously collected by a preset hydrogen concentration sensor, the variation trend of the hydrogen concentration near the preset hydrogen concentration sensor can be determined, thereby determining whether the vicinity of the preset hydrogen concentration sensor is in a state of no hydrogen leakage, a state of a potential hydrogen leakage, or a state of an impending hydrogen leakage; in addition, since the warning information contains a unique identifier corresponding to each preset hydrogen concentration sensor having a potential hydrogen leakage, the owner of the target fuel cell vehicle and the vehicle maintenance personnel can quickly determine the location of the potential hydrogen leakage in the target fuel cell engine based on the warning information, thereby effectively improving the efficiency of the vehicle maintenance personnel in servicing the target fuel cell vehicle.

[0047] The above description is only an overview of the technical solution of the present disclosure. In order to more clearly understand the technical means of the present disclosure, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific implementation methods of the present disclosure are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0049] Figure 1 A flow chart of a hydrogen leakage detection method provided in an embodiment of the present disclosure;

[0050] Figure 2 A flow chart of another hydrogen leakage detection method provided in an embodiment of the present disclosure;

[0051] Figure 3 A block diagram of the composition of a target fuel cell engine provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0052] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0053] In addition, the words “first”, “second” and the like used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts.

[0054] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present disclosure should have the common meanings understood by those skilled in the art to which the present disclosure belongs.

[0055] At present, it is usually the staff who pre-sets the hydrogen concentration value corresponding to the fuel cell engine (i.e., the preset hydrogen concentration threshold) based on experience. During the operation of the fuel cell vehicle, the hydrogen concentration values ​​at various locations in the fuel cell engine are collected by multiple preset hydrogen concentration sensors pre-installed in the fuel cell engine, and the collected hydrogen concentration values ​​are sent to the FCU in the fuel cell engine. When the hydrogen concentration value collected by a preset hydrogen concentration sensor is greater than the preset hydrogen concentration threshold, the FCU controls the fuel cell engine to stop working and sends an alarm message to the VCU so that the VCU can sound an alarm through the central control screen.

[0056] Therefore, the existing hydrogen leakage detection method can only perform hydrogen leakage detection on the fuel cell engine during the operation of the fuel cell vehicle. After the fuel cell vehicle stops running and is powered off, the fuel cell engine will not be detected for hydrogen leakage, thereby failing to effectively ensure the safety of the fuel cell vehicle after power is turned off.

[0057] In order to ensure the safety of a fuel cell vehicle after power-off, the present disclosure provides a hydrogen leakage detection method, which is applied to a target fuel cell vehicle, the target fuel cell vehicle is in a power-off state, the target fuel cell vehicle includes a target fuel cell engine, the target fuel cell engine includes an FCU (Fuel cell Control Unit, fuel cell engine main controller), a TBOX (Telematics Box, vehicle-mounted terminal), and multiple preset hydrogen concentration sensors, such as Figure 1 As shown, the method includes:

[0058] 101. The TBOX determines whether a preset condition is met. If the preset condition is met, the FCU is awakened and a first hydrogen leak detection request is sent to the FCU.

[0059] After the target fuel cell vehicle is powered off, the TBOX determines whether a preset condition is met. When the preset condition is met, the TBOX wakes up the FCU and sends a first hydrogen leak detection request to the FCU.

[0060] It should be noted that, in the present disclosure, the FCU and TBOX exchange data via the CAN bus.

[0061] It should be noted that after the target fuel cell vehicle is powered off, TBOX will start a timer and begin timing through the timer. After completing a hydrogen leakage detection, it will control the timer to reset to zero and restart timing. Therefore, the preset condition may be that the timing duration of the timer corresponding to TBOX is greater than the preset duration; because the FCU needs to rely on the low-voltage battery in the target fuel cell vehicle to provide power to start, the preset condition may also be that the current remaining power corresponding to the low-voltage battery is greater than the preset remaining power threshold, and the present disclosure does not specifically limit this.

[0062] 102. After being awakened and receiving the first hydrogen leak detection request, the FCU awakens a plurality of preset hydrogen concentration sensors, and controls the plurality of preset hydrogen concentration sensors to collect nearby hydrogen concentration values.

[0063] The installation positions of the multiple preset hydrogen concentration sensors may be, but are not limited to, at the tail exhaust outlet of the fuel cell engine, at the purge port of the fuel cell stack box, directly above the fuel cell engine assembly, and the like.

[0064] After the FCU is awakened and receives the first hydrogen leak detection request sent by TBOX, the FCU needs to wake up each preset hydrogen concentration sensor in the target fuel cell engine and control each preset hydrogen concentration sensor to collect nearby hydrogen concentration values ​​in real time.

[0065] 103. The FCU receives the collected data sent by each preset hydrogen concentration sensor.

[0066] After each preset hydrogen concentration sensor continuously collects a preset number of hydrogen concentration values, it will send the collected data (i.e., the unique identifier corresponding to the preset hydrogen concentration sensor, the multiple hydrogen concentration values ​​collected continuously, and the collection time corresponding to each hydrogen concentration value) to the FCU. At this time, the FCU can receive the collected data sent by each preset hydrogen concentration sensor.

[0067] The preset number may be, but is not limited to, 5, 10, 15, etc., and the present disclosure does not make any specific limitation on this.

[0068] It should be noted that, in the present disclosure, the FCU and each preset hydrogen concentration sensor exchange data via the CAN bus.

[0069] 104. The FCU determines a hydrogen concentration variation trend corresponding to each preset hydrogen concentration sensor according to a plurality of hydrogen concentration values ​​corresponding to each preset hydrogen concentration sensor.

[0070] For any preset hydrogen concentration sensor, the corresponding hydrogen concentration variation trend is one of: no hydrogen leakage, potential hydrogen leakage and imminent hydrogen leakage.

[0071] After receiving the collected data sent by each preset hydrogen concentration sensor, the FCU can determine the change trend of the hydrogen concentration corresponding to each preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to each preset hydrogen concentration sensor. Since hydrogen leakage detection is performed based on the multiple hydrogen concentration values ​​continuously collected by the preset hydrogen concentration sensor, the change trend of the hydrogen concentration near the preset hydrogen concentration sensor can be determined, so as to determine whether the preset hydrogen concentration sensor is in a state of no hydrogen leakage, a state of potential hydrogen leakage, or a state of imminent hydrogen leakage.

[0072] 105. When the hydrogen concentration change trend corresponding to one or more preset hydrogen concentration sensors indicates that there is a risk of hydrogen leakage, and the hydrogen concentration change trend corresponding to the remaining preset hydrogen concentration sensors indicates that there is no hydrogen leakage, the FCU sends an early warning message to the TBOX and enters a dormant state.

[0073] The early warning information includes a unique identifier corresponding to each preset hydrogen concentration sensor whose hydrogen concentration change trend indicates a potential hydrogen leakage hazard.

[0074] After the FCU determines the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor, when the hydrogen concentration change trend corresponding to one or several preset hydrogen concentration sensors indicates that there is a risk of hydrogen leakage, and the hydrogen concentration change trend corresponding to the remaining preset hydrogen concentration sensors indicates that there is no hydrogen leakage, the FCU needs to send an early warning message to TBOX, so that after TBOX sends the early warning message to the terminal device of the target fuel cell vehicle owner through the wireless network, the owner of the target fuel cell vehicle can be informed that the target fuel cell engine has a risk of hydrogen leakage and needs to be repaired in time; after the FCU sends the early warning message to TBOX, it will re-enter the sleep state.

[0075] 106. TBOX sends an early warning message to the target terminal device to remind the target fuel cell engine that there is a risk of hydrogen leakage and that it needs to be repaired in time.

[0076] The target terminal device is the terminal device of the target fuel cell vehicle owner, which may be, but is not limited to, a smart phone, a tablet computer, and the like.

[0077] After receiving the warning information sent by FCU, TBOX needs to send the warning information to the target terminal device to remind the owner of the target fuel cell vehicle that the target fuel cell engine has the risk of hydrogen leakage and needs to be repaired in time.

[0078] It should be noted that since the warning information contains the unique identifier corresponding to each preset hydrogen concentration sensor with a hydrogen leakage risk, the owner of the target fuel cell vehicle and the vehicle maintenance personnel can quickly determine the location of the hydrogen leakage risk in the target fuel cell engine based on the warning information, thereby effectively improving the efficiency of vehicle maintenance personnel in servicing the target fuel cell vehicle.

[0079] It should be noted that after TBOX sends a warning message to the target terminal device, TBOX will control its corresponding timer to reset to zero and restart the timing.

[0080] The above is the hydrogen leakage detection method provided by the embodiment of the present disclosure. In the present disclosure, after the target fuel cell vehicle stops running and is powered off, the target fuel cell engine can be subjected to hydrogen leakage detection, thereby effectively ensuring the safety of the fuel cell vehicle after being powered off; and, since the hydrogen leakage detection is performed based on multiple hydrogen concentration values ​​continuously collected by the preset hydrogen concentration sensor, the changing trend of the hydrogen concentration near the preset hydrogen concentration sensor can be determined, thereby determining whether the vicinity of the preset hydrogen concentration sensor is in a state of no hydrogen leakage, a state of a potential hydrogen leakage, or a state of an impending hydrogen leakage; in addition, since the warning information contains a unique identifier corresponding to each preset hydrogen concentration sensor with a potential hydrogen leakage, the owner of the target fuel cell vehicle and the vehicle maintenance personnel can quickly determine the location of the potential hydrogen leakage in the target fuel cell engine based on the warning information, thereby effectively improving the efficiency of the vehicle maintenance personnel in repairing the target fuel cell vehicle.

[0081] To explain in more detail below, the present disclosure provides another method for detecting hydrogen leakage, as follows: Figure 2 As shown, the method includes:

[0082] 201. Iteratively train the preset deep learning model based on the training sample set to obtain a hydrogen leak detection model.

[0083] In order to ensure that the FCU can accurately determine the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to each preset hydrogen concentration sensor, the FCU needs to pre-train the hydrogen leak detection model. The following will explain in detail how to train the hydrogen leak detection model.

[0084] (1) Obtain a training sample set.

[0085] The training sample set includes a plurality of first training samples, a plurality of second training samples and a plurality of third training samples. For any first training sample, the first training sample includes a plurality of first sample hydrogen concentration values ​​and a first hydrogen concentration change trend. The plurality of first sample hydrogen concentration values ​​are a plurality of hydrogen concentration values ​​collected by a hydrogen concentration sensor when there is no hydrogen leakage in the sample fuel cell engine, and the first hydrogen concentration change trend is no hydrogen leakage. For any second training sample, the second training sample includes a plurality of second sample hydrogen concentration values ​​and a second hydrogen concentration change trend. The plurality of second sample hydrogen concentration values ​​are a plurality of hydrogen concentration values ​​collected by a hydrogen concentration sensor when there is a hidden danger of hydrogen leakage in the sample fuel cell engine, and the second hydrogen concentration change trend is that there is a hidden danger of hydrogen leakage. For any third training sample, the third training sample includes a plurality of third sample hydrogen concentration values ​​and a third hydrogen concentration change trend. The plurality of third sample hydrogen concentration values ​​are a plurality of hydrogen concentration values ​​collected by a hydrogen concentration sensor when there is about to be a hydrogen leakage in the sample fuel cell engine, and the third hydrogen concentration change trend is that a hydrogen leakage is about to occur.

[0086] (2) Iteratively train the preset deep learning model based on the training sample set.

[0087] Among them, the preset deep learning model is a deep learning model established according to any existing deep learning algorithm, and the present disclosure does not make any specific limitations on this.

[0088] The preset deep learning model is iteratively trained based on a training sample set including multiple first training samples, multiple second training samples and multiple third training samples; wherein, after each round of training, it is determined whether the loss function of the preset deep learning model converges; if the loss function converges, the preset deep learning model obtained after this round of training is determined as the hydrogen leak detection model; if the loss function does not converge, the model parameters of the preset deep learning model are optimized and adjusted according to the loss function, and the next round of training is entered based on the optimized and adjusted preset deep learning model.

[0089] That is, after performing multiple rounds of iterative training on the preset deep learning model based on the training sample set, when the loss function of the preset deep learning model converges, it is determined that the preset deep learning model at this time is a hydrogen leak detection model.

[0090] In some specific cases, even after a large number of iterative trainings, the loss function of the preset deep learning model will not converge. Therefore, in order to avoid the endless iterative training of the preset deep learning model, when it is determined that the loss function of the preset deep learning model obtained after the current round of training has not converged, the following two methods can be used for processing, but are not limited to:

[0091] (1) If the loss function of the preset deep learning model has not converged, determine whether the current cumulative iterative training time of the preset deep learning model based on the training sample set iterative training reaches a preset time threshold.

[0092] If the current cumulative iterative training time reaches the preset time threshold, it means that the iterative training time has met the requirement. At this time, the iterative training can be stopped, and the preset deep learning model obtained after this round of training is determined as the hydrogen leak detection model.

[0093] If the current cumulative iterative training time does not reach the preset time threshold, the model parameters of the preset deep learning model can be optimized and adjusted according to the loss function of the preset deep learning model, and the next round of training can be entered based on the optimized and adjusted preset deep learning model.

[0094] (2) If the loss function of the preset deep learning model has not converged, determine whether the current cumulative number of iterative training of the preset deep learning model based on the training sample set has reached a preset number threshold.

[0095] If the current cumulative number of iterative training times reaches the preset threshold, it means that the number of iterative training times has met the requirement. At this time, the iterative training can be stopped, and the preset deep learning model obtained after this round of training is determined as the hydrogen leak detection model.

[0096] If the current cumulative number of iterative training times does not reach the preset threshold, the model parameters of the preset deep learning model can be optimized and adjusted according to the loss function of the preset deep learning model, and the next round of training can be entered based on the optimized and adjusted preset deep learning model.

[0097] 202. The TBOX determines whether a preset condition is met. If the preset condition is met, the FCU is awakened and a first hydrogen leak detection request is sent to the FCU.

[0098] Among them, the target fuel cell vehicle also includes a low-voltage battery; the preset condition is specifically that the timing duration of the timer corresponding to the TBOX is greater than the preset duration, and the current remaining power corresponding to the low-voltage battery is greater than the preset remaining power threshold.

[0099] Among them, regarding step 202, TBOX determines whether the preset condition is met. If the preset condition is met, the FCU is awakened and a first hydrogen leak detection request is sent to the FCU. For details, please refer to Figure 1 The description of the corresponding parts will not be repeated here in the embodiments of the present disclosure.

[0100] 203. After being awakened and receiving the first hydrogen leak detection request, the FCU awakens a plurality of preset hydrogen concentration sensors, and controls the plurality of preset hydrogen concentration sensors to collect nearby hydrogen concentration values.

[0101] Among them, regarding step 203, after being awakened and receiving the first hydrogen leak detection request, the FCU awakens multiple preset hydrogen concentration sensors and controls the multiple preset hydrogen concentration sensors to collect nearby hydrogen concentration values, you can refer to Figure 1 The description of the corresponding parts will not be repeated here in the embodiments of the present disclosure.

[0102] 204. The FCU receives the collected data sent by each preset hydrogen concentration sensor.

[0103] Regarding step 204, the FCU receives the collected data sent by each preset hydrogen concentration sensor, which can be referred to Figure 1 The description of the corresponding parts will not be repeated here in the embodiments of the present disclosure.

[0104] 205. The FCU determines a hydrogen concentration variation trend corresponding to each preset hydrogen concentration sensor according to a plurality of hydrogen concentration values ​​corresponding to each preset hydrogen concentration sensor.

[0105] After receiving the collected data sent by each preset hydrogen concentration sensor, the FCU can determine the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to each preset hydrogen concentration sensor.

[0106] Specifically, in this step, the FCU may determine the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to each preset hydrogen concentration sensor in any of the following three ways:

[0107] (1) For any preset hydrogen concentration sensor, the FCU inputs multiple hydrogen concentration values ​​corresponding to the preset hydrogen concentration sensor into the hydrogen leakage detection model, so that the hydrogen leakage detection model outputs the hydrogen concentration change trend corresponding to the preset hydrogen concentration sensor.

[0108] (2) The collected data corresponding to each preset hydrogen concentration sensor also includes the collection time corresponding to each hydrogen concentration value; for any preset hydrogen concentration sensor, the FCU calculates the hydrogen concentration change rate and the average hydrogen concentration value corresponding to the preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to the preset hydrogen concentration sensor and the collection time corresponding to each hydrogen concentration value; when the hydrogen concentration change rate corresponding to the preset hydrogen concentration sensor is less than the first preset change rate threshold, and the average hydrogen concentration value corresponding to the preset hydrogen concentration sensor is less than the historical average hydrogen concentration value corresponding to the preset hydrogen concentration sensor, it is determined that the hydrogen concentration change trend corresponding to the preset hydrogen concentration sensor is no hydrogen leakage; when the hydrogen concentration change rate corresponding to the preset hydrogen concentration sensor is greater than or equal to the first preset change rate threshold and the preset hydrogen concentration When the hydrogen concentration change rate corresponding to the sensor is less than the second preset change rate threshold, or the average hydrogen concentration value corresponding to the preset hydrogen concentration sensor is greater than or equal to the historical average hydrogen concentration value corresponding to the preset hydrogen concentration sensor and the average hydrogen concentration value corresponding to the preset hydrogen concentration sensor is less than the sum of the historical average hydrogen concentration value corresponding to the preset hydrogen concentration sensor and the target concentration value, it is determined that the hydrogen concentration change trend corresponding to the preset hydrogen concentration sensor is that there is a hidden danger of hydrogen leakage; when the hydrogen concentration change rate corresponding to the preset hydrogen concentration sensor is greater than the second preset change rate threshold, or the average hydrogen concentration value corresponding to the preset hydrogen concentration sensor is greater than the sum of the historical average hydrogen concentration value corresponding to the preset hydrogen concentration sensor and the target concentration value, it is determined that the hydrogen concentration change trend corresponding to the preset hydrogen concentration sensor is that a hydrogen leakage is about to occur.

[0109] Among them, the historical average hydrogen concentration value corresponding to the preset hydrogen concentration sensor is obtained by averaging multiple historical hydrogen concentration values ​​previously collected by the preset hydrogen concentration sensor; the target concentration value can be but is not limited to: 5000ppm, 8000ppm, 10000ppm, etc.

[0110] Among them, according to the multiple hydrogen concentration values ​​corresponding to the preset hydrogen concentration sensor and the collection time corresponding to each hydrogen concentration value, the specific process of calculating the hydrogen concentration change rate and the average hydrogen concentration value corresponding to the preset hydrogen concentration sensor is:

[0111] First, the average value of multiple hydrogen concentration values ​​corresponding to the preset hydrogen concentration sensor is calculated to obtain the average hydrogen concentration value corresponding to the preset hydrogen concentration sensor; secondly, among the multiple hydrogen concentration values, the hydrogen concentration value with the smallest collection time is determined as the first hydrogen concentration value, and the hydrogen concentration value with the largest collection time is determined as the second hydrogen concentration value, the first hydrogen concentration value is subtracted from the second hydrogen concentration value to obtain the hydrogen concentration difference, and the collection time corresponding to the first hydrogen concentration value is subtracted from the collection time corresponding to the second hydrogen concentration value to obtain the collection time interval, and the hydrogen concentration difference is divided by the collection time interval to obtain the hydrogen concentration change rate corresponding to the preset hydrogen concentration sensor.

[0112] (3) The collected data corresponding to each preset hydrogen concentration sensor also includes the collection time corresponding to each hydrogen concentration value; the FCU sends a second hydrogen leakage detection request carrying the unique identifier corresponding to each preset hydrogen concentration sensor, multiple hydrogen concentration values ​​and the collection time corresponding to each hydrogen concentration value to the TBOX; the TBOX sends the second hydrogen leakage detection request to the cloud platform, and the cloud platform determines the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to each preset hydrogen concentration sensor and the collection time corresponding to each hydrogen concentration value, so as to obtain the hydrogen leakage detection result corresponding to the target fuel cell vehicle, wherein the hydrogen leakage detection result includes the unique identifier corresponding to each preset hydrogen concentration sensor and the hydrogen concentration change trend; the TBOX receives the hydrogen leakage detection result sent by the cloud platform, and sends the hydrogen leakage detection result to the FCU; the FCU determines the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to the hydrogen leakage detection result.

[0113] Among them, the specific process of the cloud platform determining the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to each preset hydrogen concentration sensor and the collection time corresponding to each hydrogen concentration value can refer to the above-mentioned method (1) and method (2), and will not be repeated here in the present disclosure.

[0114] 206. When the hydrogen concentration change trend corresponding to one or more preset hydrogen concentration sensors indicates that there is a risk of hydrogen leakage, and the hydrogen concentration change trend corresponding to the remaining preset hydrogen concentration sensors indicates that there is no hydrogen leakage, the FCU sends an early warning message to the TBOX and enters a dormant state.

[0115] Among them, regarding step 206, when the hydrogen concentration change trend corresponding to one or more preset hydrogen concentration sensors indicates that there is a risk of hydrogen leakage, and the hydrogen concentration change trend corresponding to the other preset hydrogen concentration sensors indicates that there is no hydrogen leakage, the FCU sends an early warning message to the TBOX and enters a dormant state. For details, please refer to Figure 1 The description of the corresponding parts will not be repeated here in the embodiments of the present disclosure.

[0116] 207. TBOX sends an early warning message to the target terminal device to remind the target fuel cell engine that there is a risk of hydrogen leakage and that it needs to be repaired in time.

[0117] Among them, regarding step 207, TBOX sends an early warning message to the target terminal device to remind the target fuel cell engine that there is a hidden danger of hydrogen leakage and that timely maintenance is required. Figure 1 The description of the corresponding parts will not be repeated here in the embodiments of the present disclosure.

[0118] In some embodiments, after the FCU determines the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor, when the hydrogen concentration change trend corresponding to any preset hydrogen concentration sensor is that a hydrogen leakage is about to occur, the FCU needs to send an alarm message to the TBOX and enter a sleep state, wherein the alarm message includes a unique identifier corresponding to the preset hydrogen concentration sensor whose hydrogen concentration change trend is that a hydrogen leakage is about to occur; after receiving the alarm message, the TBOX will send the alarm message to the target terminal device to remind the owner of the target fuel cell vehicle that the target fuel cell engine is about to leak hydrogen and needs to be repaired in time.

[0119] It should be noted that after the target fuel cell vehicle is powered on, the FCU will send an alarm message to the VCU (Vehicle Control Unit) through the CAN bus, and the VCU will output and display the alarm message through the central control screen, further reminding the owner of the target fuel cell vehicle that the target fuel cell engine is about to leak hydrogen and needs to be repaired in time. In addition, after the FCU sends an alarm message to the VCU, it will no longer respond to the VCU's enable request and power request until the target fuel cell engine returns to normal.

[0120] It should be noted that, since the alarm information contains the alarm information of the unique identifier corresponding to the preset hydrogen concentration sensor whose hydrogen concentration change trend is about to cause hydrogen leakage, the owner of the target fuel cell vehicle and the vehicle maintenance personnel can quickly determine the location where the hydrogen leakage is about to occur in the target fuel cell engine based on the alarm information, thereby effectively improving the efficiency of vehicle maintenance personnel in servicing the target fuel cell vehicle.

[0121] As the above Figure 1 and Figure 2The implementation of the method shown in the figure, the embodiment of the present disclosure provides a target fuel cell engine, the target fuel cell engine is applied to a target fuel cell vehicle, and the target fuel cell vehicle is in a power-off state. This device embodiment corresponds to the aforementioned method embodiment. For ease of reading, this device embodiment will no longer repeat the details of the aforementioned method embodiment one by one, but it should be clear that the target fuel cell engine in this device embodiment can correspond to all the contents of the aforementioned method embodiment. Specifically, Figure 3 As shown, the target fuel cell engine includes: a fuel cell engine main controller FCU31, a vehicle terminal TBOX32, and a plurality of preset hydrogen concentration sensors;

[0122] TBOX32 is used to determine whether a preset condition is met. If the preset condition is met, the FCU31 is awakened and a first hydrogen leak detection request is sent to the FCU31;

[0123] FCU31 is used to wake up multiple preset hydrogen concentration sensors after being awakened and receiving the first hydrogen leakage detection request, and control the multiple preset hydrogen concentration sensors to collect nearby hydrogen concentration values; receive the collected data sent by each preset hydrogen concentration sensor, wherein the collected data corresponding to the preset hydrogen concentration sensor includes a unique identifier corresponding to the preset hydrogen concentration sensor and multiple hydrogen concentration values ​​continuously collected by the preset hydrogen concentration sensor; determine the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to each preset hydrogen concentration sensor; when the hydrogen concentration change trend corresponding to one or more preset hydrogen concentration sensors is that there is a hydrogen leakage hazard, and the hydrogen concentration change trend corresponding to the remaining preset hydrogen concentration sensors is that there is no hydrogen leakage, send an early warning message to TBOX32 and enter a dormant state, wherein the early warning message includes a unique identifier corresponding to each preset hydrogen concentration sensor whose hydrogen concentration change trend is that there is a hydrogen leakage hazard;

[0124] TBOX32 is also used to send early warning information to the target terminal device to remind the target fuel cell engine that there is a risk of hydrogen leakage and that it needs to be repaired in time.

[0125] In some embodiments, Figure 3 As shown, FCU31 is specifically used to input multiple hydrogen concentration values ​​corresponding to the preset hydrogen concentration sensors into the hydrogen leakage detection model, so that the hydrogen leakage detection model outputs the hydrogen concentration change trend corresponding to the preset hydrogen concentration sensors.

[0126] In some embodiments, Figure 3As shown, the collected data corresponding to the preset hydrogen concentration sensor also includes the collection time corresponding to each hydrogen concentration value; FCU31 is specifically used to calculate the hydrogen concentration change rate and the average hydrogen concentration value corresponding to the preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to the preset hydrogen concentration sensor and the collection time corresponding to each hydrogen concentration value; when the hydrogen concentration change rate is less than the first preset change rate threshold, and the average hydrogen concentration value is less than the historical average hydrogen concentration value corresponding to the preset hydrogen concentration sensor, it is determined that the hydrogen concentration change trend corresponding to the preset hydrogen concentration sensor is no hydrogen leakage; when the hydrogen concentration change rate is less than the first preset change rate threshold, and the average hydrogen concentration value is less than the historical average hydrogen concentration value corresponding to the preset hydrogen concentration sensor, it is determined that the hydrogen concentration change trend corresponding to the preset hydrogen concentration sensor is no hydrogen leakage; When the hydrogen concentration change rate is greater than or equal to the first preset change rate threshold and the hydrogen concentration change rate is less than the second preset change rate threshold, or the average hydrogen concentration value is greater than or equal to the historical average hydrogen concentration value and the average hydrogen concentration value is less than the sum of the historical average hydrogen concentration value and the target concentration value, it is determined that the hydrogen concentration change trend corresponding to the preset hydrogen concentration sensor is that there is a risk of hydrogen leakage; when the hydrogen concentration change rate is greater than the second preset change rate threshold, or the average hydrogen concentration value is greater than the sum of the historical average hydrogen concentration value and the target concentration value, it is determined that the hydrogen concentration change trend corresponding to the preset hydrogen concentration sensor is that a hydrogen leakage is about to occur.

[0127] In some embodiments, Figure 3 As shown, the collected data corresponding to the preset hydrogen concentration sensor also includes the collection time corresponding to each hydrogen concentration value;

[0128] FCU31 is further used to send a second hydrogen leakage detection request carrying a unique identifier corresponding to each preset hydrogen concentration sensor, multiple hydrogen concentration values ​​and a collection time corresponding to each hydrogen concentration value to TBOX32;

[0129] TBOX32 is also used to send a second hydrogen leakage detection request to the cloud platform, so that the cloud platform can determine the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to each preset hydrogen concentration sensor and the acquisition time corresponding to each hydrogen concentration value, so as to obtain the hydrogen leakage detection result corresponding to the target fuel cell vehicle, wherein the hydrogen leakage detection result includes the unique identifier corresponding to each preset hydrogen concentration sensor and the hydrogen concentration change trend; receive the hydrogen leakage detection result sent by the cloud platform, and send the hydrogen leakage detection result to FCU31;

[0130] The FCU31 is also used to determine the hydrogen concentration variation trend corresponding to each preset hydrogen concentration sensor according to the hydrogen leakage detection result.

[0131] In some embodiments, Figure 3As shown, FCU31 is also used to obtain a training sample set, wherein the training sample set includes a plurality of first training samples, a plurality of second training samples and a plurality of third training samples. For any first training sample, the first training sample includes a plurality of first sample hydrogen concentration values ​​and a first hydrogen concentration change trend. The plurality of first sample hydrogen concentration values ​​are a plurality of hydrogen concentration values ​​collected when there is no hydrogen leakage in the sample fuel cell engine, and the first hydrogen concentration change trend is no hydrogen leakage. For any second training sample, the second training sample includes a plurality of second sample hydrogen concentration values ​​and a second hydrogen concentration change trend. The plurality of second sample hydrogen concentration values ​​are a plurality of hydrogen concentration values ​​collected when there is a hydrogen leakage risk in the sample fuel cell engine, and the second hydrogen concentration change trend is the presence of a hydrogen leakage risk. Leakage hazard, for any third training sample, the third training sample includes multiple third sample hydrogen concentration values ​​and a third hydrogen concentration change trend, the multiple third sample hydrogen concentration values ​​are multiple hydrogen concentration values ​​collected when the sample fuel cell engine is about to leak hydrogen, and the third hydrogen concentration change trend is that a hydrogen leakage is about to occur; based on the training sample set, the preset deep learning model is iteratively trained; wherein, after each round of training, it is determined whether the loss function of the preset deep learning model converges; if the loss function converges, the preset deep learning model obtained after this round of training is determined as the hydrogen leakage detection model; if the loss function does not converge, the model parameters of the preset deep learning model are optimized and adjusted according to the loss function, and the next round of training is entered based on the optimized and adjusted preset deep learning model.

[0132] In some embodiments, Figure 3 As shown, FCU31 is also used to send an alarm message to TBOX32 and enter a dormant state when the hydrogen concentration change trend corresponding to any preset hydrogen concentration sensor is about to cause a hydrogen leak, wherein the alarm message contains a unique identifier corresponding to the preset hydrogen concentration sensor whose hydrogen concentration change trend is about to cause a hydrogen leak;

[0133] TBOX32 is also used to send alarm information to the target terminal device to prompt the target fuel cell engine that hydrogen leakage is about to occur and timely maintenance is required.

[0134] In some embodiments, Figure 3 As shown, the target fuel cell vehicle also includes a low-voltage battery; the preset condition is that the timing duration of the timer corresponding to TBOX32 is greater than the preset duration, and the current remaining power corresponding to the low-voltage battery is greater than the preset remaining power threshold.

[0135] An embodiment of the present disclosure provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the above hydrogen leakage detection method is implemented.

[0136] An embodiment of the present disclosure provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the above hydrogen leakage detection method is implemented when the processor executes the computer program.

[0137] The present disclosure 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 disclosure. 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 instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0138] In a typical configuration, the device includes one or more processors (CPU), memory and bus. The device may also include input / output interface, network interface and the like.

[0139] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip. The memory is an example of a computer-readable medium.

[0140] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0141] 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.

[0142] It will be appreciated by those skilled in the art that the embodiments of the present disclosure may be provided as methods, systems or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware. Moreover, the present disclosure may take 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 code.

[0143] The above are only embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the scope of the claims of the present disclosure.

[0144] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0145] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0146] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0147] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A method for detecting hydrogen leakage, characterized in that: The method is applied to a target fuel cell vehicle, the target fuel cell vehicle is in a power-off state, the target fuel cell vehicle includes a target fuel cell engine, the target fuel cell engine includes a fuel cell engine main controller FCU, a vehicle-mounted terminal TBOX, and a plurality of preset hydrogen concentration sensors, and the method includes: The TBOX determines whether a preset condition is met, and if so, wakes up the FCU and sends a first hydrogen leak detection request to the FCU; After being awakened and receiving the first hydrogen leak detection request, the FCU awakens the plurality of preset hydrogen concentration sensors and controls the plurality of preset hydrogen concentration sensors to collect nearby hydrogen concentration values; The FCU receives the collected data sent by each of the preset hydrogen concentration sensors, wherein the collected data corresponding to the preset hydrogen concentration sensor includes a unique identifier corresponding to the preset hydrogen concentration sensor and a plurality of hydrogen concentration values ​​continuously collected by the preset hydrogen concentration sensor; The FCU determines a hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to a plurality of hydrogen concentration values ​​corresponding to each preset hydrogen concentration sensor; When the hydrogen concentration change trend corresponding to one or more of the preset hydrogen concentration sensors indicates that there is a potential hydrogen leakage risk, and the hydrogen concentration change trend corresponding to the remaining preset hydrogen concentration sensors indicates that there is no hydrogen leakage, the FCU sends an early warning message to the TBOX and enters a dormant state, wherein the early warning message includes a unique identifier corresponding to each of the preset hydrogen concentration sensors whose hydrogen concentration change trend indicates that there is a potential hydrogen leakage risk; The TBOX sends an early warning message to the target terminal device to remind the target fuel cell engine that there is a potential hydrogen leakage hazard and that timely maintenance is required.

2. The hydrogen leakage detection method according to claim 1, characterized in that: The FCU determines the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to each preset hydrogen concentration sensor, including: The FCU inputs a plurality of hydrogen concentration values ​​corresponding to the preset hydrogen concentration sensor into a hydrogen leakage detection model, so that the hydrogen leakage detection model outputs a hydrogen concentration variation trend corresponding to the preset hydrogen concentration sensor.

3. The hydrogen leakage detection method according to claim 1, characterized in that: The collected data corresponding to the preset hydrogen concentration sensor also includes the collection time corresponding to each of the hydrogen concentration values; the FCU determines the hydrogen concentration change trend corresponding to each of the preset hydrogen concentration sensors according to the multiple hydrogen concentration values ​​corresponding to each of the preset hydrogen concentration sensors, including: The FCU calculates the hydrogen concentration change rate and the average hydrogen concentration value corresponding to the preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to the preset hydrogen concentration sensor and the collection time corresponding to each of the hydrogen concentration values; when the hydrogen concentration change rate is less than a first preset change rate threshold, and the average hydrogen concentration value is less than the historical average hydrogen concentration value corresponding to the preset hydrogen concentration sensor, it is determined that the hydrogen concentration change trend corresponding to the preset hydrogen concentration sensor is no hydrogen leakage; when the hydrogen concentration change rate is greater than or equal to the first preset change rate threshold and the hydrogen concentration change value is less than the historical average hydrogen concentration value corresponding to the preset hydrogen concentration sensor When the hydrogen concentration change rate is less than a second preset change rate threshold, or the average hydrogen concentration value is greater than or equal to the historical average hydrogen concentration value and the average hydrogen concentration value is less than the sum of the historical average hydrogen concentration value and the target concentration value, it is determined that the hydrogen concentration change trend corresponding to the preset hydrogen concentration sensor is that there is a risk of hydrogen leakage; when the hydrogen concentration change rate is greater than the second preset change rate threshold, or the average hydrogen concentration value is greater than the sum of the historical average hydrogen concentration value and the target concentration value, it is determined that the hydrogen concentration change trend corresponding to the preset hydrogen concentration sensor is that a hydrogen leakage is about to occur.

4. The hydrogen leakage detection method according to claim 1, characterized in that: The collected data corresponding to the preset hydrogen concentration sensor also includes the collection time corresponding to each of the hydrogen concentration values; the FCU determines the hydrogen concentration change trend corresponding to each of the preset hydrogen concentration sensors according to the multiple hydrogen concentration values ​​corresponding to each of the preset hydrogen concentration sensors, including: The FCU sends a second hydrogen leakage detection request carrying a unique identifier corresponding to each of the preset hydrogen concentration sensors, a plurality of hydrogen concentration values, and a collection time corresponding to each hydrogen concentration value to the TBOX; The TBOX sends the second hydrogen leakage detection request to the cloud platform, so that the cloud platform determines the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to each preset hydrogen concentration sensor and the collection time corresponding to each hydrogen concentration value, so as to obtain the hydrogen leakage detection result corresponding to the target fuel cell vehicle, wherein the hydrogen leakage detection result includes the unique identifier corresponding to each preset hydrogen concentration sensor and the hydrogen concentration change trend; The TBOX receives the hydrogen leakage detection result sent by the cloud platform, and sends the hydrogen leakage detection result to the FCU; The FCU determines the hydrogen concentration variation trend corresponding to each of the preset hydrogen concentration sensors according to the hydrogen leakage detection result.

5. The hydrogen leakage detection method according to claim 2, characterized in that: The method further comprises: The FCU obtains a training sample set, wherein the training sample set includes a plurality of first training samples, a plurality of second training samples, and a plurality of third training samples. For any one of the first training samples, the first training sample includes a plurality of first sample hydrogen concentration values ​​and a first hydrogen concentration change trend. The plurality of first sample hydrogen concentration values ​​are a plurality of hydrogen concentration values ​​collected when there is no hydrogen leakage in the sample fuel cell engine, and the first hydrogen concentration change trend is no hydrogen leakage. For any one of the second training samples, the second training sample includes a plurality of second sample hydrogen concentration values ​​and a second hydrogen concentration change trend. The plurality of second sample hydrogen concentration values ​​are a plurality of hydrogen concentration values ​​collected when there is a hydrogen leakage hazard in the sample fuel cell engine, and the second hydrogen concentration change trend is that there is a hydrogen leakage hazard. For any one of the second training samples, the second training sample includes a plurality of second sample hydrogen concentration values ​​and a second hydrogen concentration change trend. The plurality of second sample hydrogen concentration values ​​are a plurality of hydrogen concentration values ​​collected when there is a hydrogen leakage hazard in the sample fuel cell engine, and the second hydrogen concentration change trend is that there is a hydrogen leakage hazard. For a third training sample, the third training sample includes multiple third sample hydrogen concentration values ​​and a third hydrogen concentration change trend, the multiple third sample hydrogen concentration values ​​are multiple hydrogen concentration values ​​collected when the sample fuel cell engine is about to leak hydrogen, and the third hydrogen concentration change trend is that a hydrogen leak is about to occur; based on the training sample set, the preset deep learning model is iteratively trained; wherein, after each round of training, it is determined whether the loss function of the preset deep learning model converges; if the loss function converges, the preset deep learning model obtained after this round of training is determined as the hydrogen leak detection model; if the loss function does not converge, the model parameters of the preset deep learning model are optimized and adjusted according to the loss function, and the next round of training is entered based on the preset deep learning model after optimization and adjustment.

6. The hydrogen leakage detection method according to claim 1, characterized in that: The method further comprises: When the hydrogen concentration change trend corresponding to any one of the preset hydrogen concentration sensors indicates that hydrogen leakage is about to occur, the FCU sends an alarm message to the TBOX and enters a dormant state, wherein the alarm message includes a unique identifier corresponding to the preset hydrogen concentration sensor whose hydrogen concentration change trend indicates that hydrogen leakage is about to occur; The TBOX sends an alarm message to the target terminal device to prompt the target fuel cell engine that hydrogen leakage is about to occur and timely maintenance is required.

7. The hydrogen leakage detection method according to claim 1, characterized in that: The target fuel cell vehicle also includes a low-voltage battery; the preset condition is that the timing duration of the timer corresponding to the TBOX is greater than the preset duration, and the current remaining power corresponding to the low-voltage battery is greater than the preset remaining power threshold.

8. A target fuel cell engine, characterized in that: The target fuel cell engine is applied to a target fuel cell vehicle, the target fuel cell vehicle is in a power-off state, and the target fuel cell engine comprises: a fuel cell engine main controller FCU, a vehicle-mounted terminal TBOX, and a plurality of preset hydrogen concentration sensors; The TBOX is used to determine whether a preset condition is met, and if the preset condition is met, wake up the FCU and send a first hydrogen leak detection request to the FCU; The FCU is used to wake up multiple preset hydrogen concentration sensors after being awakened and receiving the first hydrogen leakage detection request, and control the multiple preset hydrogen concentration sensors to collect nearby hydrogen concentration values; receive the collected data sent by each preset hydrogen concentration sensor, wherein the collected data corresponding to the preset hydrogen concentration sensor includes a unique identifier corresponding to the preset hydrogen concentration sensor and multiple hydrogen concentration values ​​continuously collected by the preset hydrogen concentration sensor; determine the hydrogen concentration change trend corresponding to each preset hydrogen concentration sensor according to the multiple hydrogen concentration values ​​corresponding to each preset hydrogen concentration sensor; when the hydrogen concentration change trend corresponding to one or more preset hydrogen concentration sensors indicates that there is a potential hydrogen leakage, and the hydrogen concentration change trend corresponding to the remaining preset hydrogen concentration sensors indicates that there is no hydrogen leakage, send an early warning message to the TBOX and enter a dormant state, wherein the early warning message includes a unique identifier corresponding to each preset hydrogen concentration sensor whose hydrogen concentration change trend indicates that there is a potential hydrogen leakage; The TBOX is also used to send warning information to the target terminal device to prompt the target fuel cell engine that there is a hidden danger of hydrogen leakage and that timely maintenance is required.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the hydrogen leakage detection method according to any one of claims 1 to 7 is implemented.

10. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the hydrogen leakage detection method according to any one of claims 1 to 7.

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