Fault diagnosis method and device for fuel cell vehicle, storage medium and terminal

Abstract

The application discloses a fuel cell vehicle fault diagnosis method and device, a storage medium and a terminal, relates to the technical field of information processing, and mainly aims to solve the problem of low investigation efficiency of fuel cell system shutdown reasons. Mainly includes when receiving the detection result of fuel cell system operation is shutdown state, at least one of the condition triggering parameters of the whole vehicle control strategy and the fault information of the candidate associated object is obtained; based on the matching result of the fault information and / or the condition triggering parameter and the whole vehicle control strategy, the shutdown diagnosis result of the fuel cell system is determined, and the shutdown diagnosis result at least includes one of the shutdown reason and the shutdown associated object; based on the shutdown diagnosis result, prompt information for indicating the shutdown fault category is generated, and the prompt information is sent to the target terminal. Mainly used for assisting in investigating the shutdown reason of the fuel cell system.

Description

Technical Field

[0001] This invention relates to the field of fault detection technology and fuel cell vehicle technology, and in particular to a fault diagnosis method and device, storage medium and terminal for fuel cell vehicles. Background Technology

[0002] With global environmental issues becoming increasingly prominent, clean energy vehicles are gradually becoming the mainstream development direction of the automotive industry. Hydrogen fuel cell vehicles, as a type of clean energy device, utilize the core technology of their fuel cells—a chemical reaction between hydrogen and oxygen in the presence of a catalyst—to generate electricity. The fuel cell system is the key energy supply subsystem that controls this chemical reaction to provide power for the vehicle's operation. It plays a crucial role in the overall power system of hydrogen fuel cell vehicles, and its proper operation directly affects the normal operation of the entire vehicle.

[0003] Currently, existing fault detection methods for hydrogen fuel cell vehicles can only identify whether the fuel cell system is operating normally or has stopped operating, but cannot determine the specific reason for the fuel cell system to stop operating. Furthermore, there are many reasons that can cause the fuel cell system to stop operating, which increases the difficulty of troubleshooting and requires a lot of time to investigate the cause of the shutdown, resulting in low efficiency in troubleshooting fuel cell system shutdown. Summary of the Invention

[0004] In view of this, the present invention provides a fault diagnosis method and device, storage medium and terminal for fuel cell vehicles, the main purpose of which is to solve the problem of low efficiency in troubleshooting the causes of shutdown in existing fuel cell systems.

[0005] According to one aspect of the present invention, a fault diagnosis method for a fuel cell vehicle is provided, comprising:

[0006] When the detection result of the fuel cell system operation is received as a shutdown state, at least one of the conditional trigger parameters of the vehicle control strategy and the fault information of the candidate associated objects is obtained;

[0007] The shutdown diagnosis result of the fuel cell system is determined based on the fault information and / or the matching result of the condition triggering parameters and the vehicle control strategy. The shutdown diagnosis result includes at least one of the shutdown cause and the shutdown associated object. The shutdown cause includes vehicle control shutdown, fault shutdown, and other occasional shutdown.

[0008] Based on the shutdown diagnosis results, a prompt message is generated to indicate the type of shutdown fault, and the prompt message is sent to the target terminal.

[0009] Furthermore, determining the shutdown diagnostic result of the fuel cell system based on the fault information and / or the matching result of the conditional triggering parameters with the vehicle control strategy includes:

[0010] Based on the fault information, a first investigation result is determined. If the first investigation result contains a shutdown-related object, the shutdown cause of the shutdown diagnosis result is determined to be a fault shutdown.

[0011] If the first investigation result does not contain a shutdown-related object, then the second investigation result is determined based on the matching result of the condition triggering parameter and the vehicle control strategy. If the second investigation result indicates that the shutdown reason is a vehicle control shutdown, then the shutdown reason of the shutdown diagnosis result is determined to be a vehicle control shutdown.

[0012] If the second investigation result indicates that the shutdown cause is not a vehicle control shutdown, then the shutdown diagnosis result is determined to be a shutdown caused by other occasional reasons.

[0013] Furthermore, if the first investigation result does not contain a shutdown-related object, determining the second investigation result based on the matching result of the conditional triggering parameters and the vehicle control strategy includes:

[0014] If the first condition triggering parameter matches any of the matching conditions in the fault and parameter mutation control strategy, a second investigation result is generated to characterize the vehicle control shutdown caused by parameter mutation.

[0015] If the second condition triggering parameter matches any of the matching conditions in the energy control strategy, a second investigation result is generated to characterize the energy strategy causing the vehicle control to stop.

[0016] Furthermore, the candidate shutdown-related objects include system objects and component objects, and determining the first investigation result based on the fault information includes:

[0017] For the system object, if the fault level in the fault information is greater than a preset level threshold, the system object is identified as a shutdown-related object, and a first investigation result is generated based on the fault information of the system object.

[0018] For the component object, if the fault type of the component object matches the shutdown-related fault type, then the component object is identified as a shutdown-related object, and a first investigation result is generated based on the fault information of the component object.

[0019] Furthermore, before determining the shutdown diagnostic result of the fuel cell system based on the fault information and / or the matching result of the conditional triggering parameters with the vehicle control strategy, the method further includes:

[0020] Obtain historical downtime and maintenance data of the fuel cell system, and extract component object maintenance data from the historical downtime and maintenance data;

[0021] Configure the component object fault corresponding to the component object maintenance data as a downtime associated fault type.

[0022] Furthermore, the step of generating a prompt message indicating the type of shutdown fault based on the shutdown diagnosis results includes:

[0023] If the shutdown diagnosis result indicates a vehicle control shutdown, and the shutdown diagnosis result does not contain a shutdown-related object, then a prompt message is generated indicating that the shutdown fault category is the first shutdown fault category, where the first shutdown fault category indicates a non-repair recovery.

[0024] If the shutdown diagnosis result indicates a fault, a prompt message is generated indicating that the shutdown fault category is the second shutdown fault category, which indicates maintenance recovery.

[0025] Furthermore, the method also includes:

[0026] If the shutdown reason is other occasional reasons, then obtain the global fault information at the current moment;

[0027] The global fault information is sorted according to the association level between the fault subject and the fuel cell system to obtain a candidate fault sequence;

[0028] Based on the candidate fault sequence, a prompt message for the third shutdown fault category is generated.

[0029] According to another aspect of the present invention, a fault diagnosis device for a fuel cell vehicle is provided, comprising:

[0030] The acquisition module is used to acquire the conditional trigger parameters of the vehicle control strategy and the fault information of the candidate associated objects when the detection result of the fuel cell system operation is a shutdown state.

[0031] The determination module is used to determine the shutdown diagnosis result of the fuel cell system based on the fault information and / or the matching result of the condition triggering parameters and the vehicle control strategy. The shutdown diagnosis result includes at least one of the shutdown cause and the shutdown associated object. The shutdown cause includes vehicle control shutdown, fault shutdown, and other occasional shutdown.

[0032] The generation module is used to generate a prompt message indicating the type of shutdown fault based on the shutdown diagnosis results, and send the prompt message to the target terminal.

[0033] Furthermore, the determining module includes:

[0034] The first determining unit is used to determine a first investigation result based on the fault information. If the first investigation result contains a shutdown-related object, the shutdown cause of the shutdown diagnosis result is determined to be a fault shutdown.

[0035] The second determining unit is used to determine the second investigation result based on the matching result of the condition triggering parameter and the vehicle control strategy if the first investigation result does not contain a shutdown-related object; and to determine the shutdown cause of the shutdown diagnosis result as a vehicle control shutdown if the second investigation result indicates that the shutdown cause is a vehicle control shutdown.

[0036] The third determining unit is used to determine the shutdown cause of the shutdown diagnosis result as other occasional causes if the second investigation result indicates that the shutdown cause is a non-vehicle control shutdown.

[0037] Furthermore, in a specific application scenario, the second determining unit is specifically used to generate a second investigation result to characterize the vehicle control shutdown caused by parameter mutation if the first condition triggering parameter matches any matching condition in the fault and parameter mutation control strategy.

[0038] If the second condition triggering parameter matches any of the matching conditions in the energy control strategy, a second investigation result is generated to characterize the energy strategy causing the vehicle control to stop.

[0039] Furthermore, in a specific application scenario, the first determining unit is specifically used to determine the system object as a shutdown-related object if the fault level in the fault information is greater than a preset level threshold, and generate a first investigation result based on the fault information of the system object.

[0040] For the component object, if the fault type of the component object matches the shutdown-related fault type, then the component object is identified as a shutdown-related object, and a first investigation result is generated based on the fault information of the component object.

[0041] Furthermore, the device also includes:

[0042] The extraction module is used to acquire historical downtime and maintenance data of the fuel cell system and extract component object maintenance data from the historical downtime and maintenance data.

[0043] The configuration module is used to configure the component object fault corresponding to the component object maintenance data as a downtime associated fault type.

[0044] Furthermore, the generation module includes:

[0045] The first generation unit is configured to generate a prompt message indicating that the shutdown fault category is a first shutdown fault category if the shutdown diagnosis result indicates a vehicle control shutdown and the shutdown diagnosis result does not contain a shutdown-related object. The first shutdown fault category indicates a non-repair type recovery.

[0046] The second generation unit is used to generate a prompt message indicating that the shutdown fault category is a second shutdown fault category if the shutdown diagnosis result indicates a fault, wherein the second shutdown fault category indicates a maintenance recovery.

[0047] Furthermore, the device also includes:

[0048] The acquisition module is further configured to acquire global fault information at the current moment if the shutdown reason is other occasional reasons.

[0049] The sorting module is used to sort the global fault information according to the association level between the fault subject of the global fault information and the fuel cell system to obtain a candidate fault sequence;

[0050] The generation module is used to generate a prompt message for a third shutdown fault category based on the candidate fault sequence.

[0051] According to another aspect of the present invention, a storage medium is provided, wherein at least one executable instruction is stored therein, the executable instruction causing a processor to perform an operation corresponding to the above-described fault diagnosis method for fuel cell vehicles.

[0052] According to another aspect of the present invention, a terminal is provided, comprising: a processor, a memory, a communication interface, and a communication bus, wherein the processor, the memory, and the communication interface communicate with each other through the communication bus;

[0053] The memory is used to store at least one executable instruction, which causes the processor to perform the operation corresponding to the above-described fault diagnosis method for fuel cell vehicles.

[0054] By employing the above-described technical solutions, the technical solutions provided by the embodiments of the present invention have at least the following advantages:

[0055] This invention provides a fault diagnosis method, device, storage medium, and terminal for fuel cell vehicles. In this embodiment, when the detection result of the fuel cell system operation is a shutdown state, at least one of the following is obtained: conditional trigger parameters of the vehicle control strategy and fault information of candidate associated objects. Based on the fault information and / or the matching result of the conditional trigger parameters with the vehicle control strategy, a shutdown diagnosis result of the fuel cell system is determined. The shutdown diagnosis result includes at least one of a shutdown cause and a shutdown associated object. The shutdown cause includes vehicle control shutdown, fault shutdown, and shutdown due to other occasional reasons. Based on the shutdown diagnosis result, a prompt message indicating the shutdown fault type is generated and sent to the target terminal. This significantly reduces the time and difficulty of troubleshooting fuel cell system shutdown causes while ensuring the accuracy of the troubleshooting, thereby greatly improving the efficiency of fuel cell system shutdown cause troubleshooting.

[0056] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0057] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0058] Figure 1 A flowchart of a fault diagnosis method for a fuel cell vehicle provided by an embodiment of the present invention is shown;

[0059] Figure 2 A flowchart of another fault diagnosis method for fuel cell vehicles provided by an embodiment of the present invention is shown;

[0060] Figure 3 A block diagram of a fault diagnosis device for a fuel cell vehicle provided in an embodiment of the present invention is shown.

[0061] Figure 4 A schematic diagram of the structure of a terminal provided in an embodiment of the present invention is shown. Detailed Implementation

[0062] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0063] Existing fault detection methods for hydrogen fuel cell vehicles can only identify whether the fuel cell system is operating normally or has stopped, but cannot determine the specific cause of the shutdown. Furthermore, there are many possible causes for fuel cell system shutdown, increasing the difficulty of troubleshooting and requiring a significant amount of time, resulting in low efficiency in identifying the cause of fuel cell system shutdowns. This invention provides a fault diagnosis method for fuel cell vehicles, such as... Figure 1 As shown, the method includes:

[0064] 101. When the detection result of the fuel cell system operation is received as a shutdown state, obtain the condition trigger parameters of the vehicle control strategy and the fault information of the candidate associated objects.

[0065] In this embodiment of the invention, the fuel cell system is a subsystem within the fuel cell power system of a hydrogen fuel cell vehicle. The scenario for testing the fuel cell system can be either a vehicle development and testing scenario or a normal usage scenario. The operating state of the fuel cell system is affected not only by the state of its own components but also by the vehicle's control strategy and the operating state of other related systems or components. For example, faults in the vehicle's power battery, motor, or power supply may cause the fuel cell system to shut down, and faults in other components may also cause the fuel cell system to reduce load and shut down. Therefore, the cause of fuel cell shutdown cannot be directly determined; it requires analysis based on relevant vehicle control parameters and fault information from other systems or components that may cause the fuel cell system to shut down to determine the specific cause. The vehicle control strategy includes multiple matching conditions that can trigger vehicle control. The triggering parameters are parameters corresponding to these matching conditions. For example, the state of charge (SOC) and temperature of the component are triggering parameters. When these parameters meet the matching conditions in the vehicle control strategy, the vehicle control system will issue a shutdown control command to the fuel cell system. Among them, the candidate associated objects are determined based on the relationship between systems and historical experience. Once they fail, they will cause the fuel cell system to shut down. Therefore, it is necessary to obtain the failure information of the candidate associated objects as the basis for cause analysis.

[0066] It should be noted that the conditional trigger parameters are used as the basis for judging the execution of vehicle control, rather than the shutdown control command sent by the vehicle controller. This is because during the vehicle development and testing phase, there may be cases where the vehicle control strategy is flawed. If the shutdown control command is used as the basis for judgment, the error in the vehicle control strategy cannot be detected. For example, a lithium battery failure may cause a shutdown, which should not trigger the vehicle control. However, due to the strategy error, the vehicle controller also issues a shutdown command. If the vehicle control situation is judged first in this case, the shutdown cause will be directly identified as a vehicle control shutdown, without finding the real shutdown cause - the lithium battery failure.

[0067] 102. Determine the shutdown diagnosis result of the fuel cell system based on the fault information and / or the matching result of the condition triggering parameters and the vehicle control strategy.

[0068] In this embodiment of the invention, the shutdown diagnosis result includes at least one of the shutdown cause and the shutdown-related object. The shutdown cause includes vehicle control shutdown, fault shutdown, and other occasional shutdown. Since the main causes of fuel cell system shutdown include both vehicle control shutdown and fault shutdown, the specific cause is identified based on fault information and conditional triggering parameters. Specifically, if any of the candidate related objects fails, it indicates that the current fuel cell system shutdown state is caused by a fault, and the specific fault subject, i.e., the shutdown-related object, can be determined based on the candidate related objects corresponding to the fault information. If the conditional triggering parameters match the vehicle control strategy, it indicates that the vehicle controller's shutdown strategy for the fuel cell system was triggered before the fuel cell system shutdown, and the vehicle controller issued a shutdown command to the fuel cell system. It can be determined that the current shutdown cause is caused by the control of the vehicle controller, and the component that triggered the vehicle control strategy can be determined based on the data acquisition object corresponding to the conditional triggering parameters. If neither of the two reasons is met, it indicates that the current shutdown is not caused by a failure of the vehicle controller or the candidate associated object, but by an unconventional cause, such as an error in the control strategy during the development and testing phase, which is classified as an other occasional shutdown cause.

[0069] It should be noted that the process of confirming fault information and the process of confirming the matching results between the conditional trigger parameters and the vehicle control strategy are not sequentially related, and only one of them needs to be confirmed. For example, if a fault shutdown is confirmed first, the matching of conditional trigger parameters and the vehicle control strategy can be skipped, and the shutdown cause can be directly confirmed as a fault shutdown. Alternatively, if a vehicle control shutdown is confirmed first, the fault information can be confirmed without further confirmation, and the shutdown cause can be directly confirmed as a vehicle control shutdown. Alternatively, the fault information can be further confirmed; if it is a fault shutdown, then it can be confirmed as a fault shutdown. The strategy for confirming the shutdown cause can be set according to specific application requirements, and this embodiment of the invention does not impose specific limitations. By matching the fault information of candidate associated objects and the conditional trigger parameters with the vehicle control strategy, the specific cause of the fuel cell system shutdown can be distinguished, and the specific shutdown associated object leading to the fault shutdown can be identified, thereby providing an accurate reference for subsequent maintenance and troubleshooting.

[0070] 103. Generate a prompt message indicating the type of shutdown fault based on the shutdown diagnosis results, and send the prompt message to the target terminal.

[0071] In this embodiment of the invention, after confirming the shutdown diagnosis result, to further improve the efficiency of troubleshooting, the matching shutdown fault category for the current shutdown is determined based on the shutdown diagnosis result. For example, a vehicle control shutdown may not require personnel to repair specific components, only requiring vehicle restart operations, so the shutdown fault category can be set to a lower level category; a fault shutdown, on the other hand, is highly likely to require professional personnel to repair specific components, so the shutdown fault category can be set to a higher level category, and a prompt message is sent to the target terminal. The target terminal can be the in-vehicle display terminal, the owner's mobile terminal, or a vehicle-linked maintenance personnel or a vehicle development test terminal, etc., and this embodiment of the invention does not make specific limitations. The prompt message may include not only the shutdown fault category, but also comprehensive information such as the shutdown cause and fault location, for example, "A fault in the fuel cell system itself caused the fuel cell system to shut down, the fault name is: A, and the shutdown fault category is the second shutdown fault category," and this embodiment of the invention does not make specific limitations.

[0072] It should be noted that by classifying downtime faults, more accurate response suggestions can be provided to vehicle drivers and maintenance personnel, making the direction of troubleshooting clearer, reducing troubleshooting time, and thus effectively improving the efficiency of troubleshooting fuel cell system downtime causes.

[0073] In one embodiment of the present invention, for further illustration and limitation, such as Figure 2As shown, the steps for determining the shutdown diagnostic result of the fuel cell system based on the fault information and / or the matching result of the conditional triggering parameters with the vehicle control strategy include:

[0074] 201. Based on the fault information, determine the first investigation result. If the first investigation result contains a shutdown-related object, then determine the shutdown cause of the shutdown diagnosis result as a fault shutdown.

[0075] 202. If the first investigation result does not contain a shutdown-related object, then the second investigation result is determined based on the matching result of the condition triggering parameter and the vehicle control strategy. If the second investigation result indicates that the shutdown reason is a vehicle control shutdown, then the shutdown reason of the shutdown diagnosis result is determined to be a vehicle control shutdown.

[0076] 203. If the second investigation result indicates that the shutdown cause is a non-vehicle control shutdown, then the shutdown diagnosis result is determined to be a shutdown caused by other occasional reasons.

[0077] In this embodiment of the invention, fault information is determined first. If the first investigation result includes a shutdown-related object, it indicates that there is an object among the candidate related objects that caused the fuel cell system to shut down due to a fault, and the shutdown cause is determined to be a fault shutdown. If the first investigation result does not include a shutdown-related object, the obtained conditional triggering parameters are further matched with the matching conditions in the vehicle control strategy. If the matching result indicates that the conditional triggering parameters triggered the vehicle controller's control action on the fuel cell, the shutdown cause is determined to be a vehicle control shutdown. If the matching result indicates that the conditional triggering parameters did not trigger the vehicle controller's control action on the fuel cell, it indicates that the shutdown cause is neither a fault shutdown nor a vehicle control shutdown, and the shutdown cause is determined to be a shutdown caused by other occasional reasons.

[0078] It should be noted that, since malfunctions and vehicle control issues may occur simultaneously—for example, a hydrogen system malfunction might cause the hydrogen system controller to send a malfunction report to the vehicle, and the vehicle controller, based on the received malfunction report, to send a shutdown control command to the fuel cell system—although the fuel cell system's shutdown action is based on the vehicle control command, the root cause is still the malfunction. Therefore, prioritizing malfunction troubleshooting will further improve the accuracy of malfunction diagnosis.

[0079] In one embodiment of the present invention, for further explanation and limitation, the step of determining the second screening result based on the matching result of the conditional triggering parameters and the vehicle control strategy includes:

[0080] If the first condition triggering parameter matches any of the matching conditions in the fault and parameter mutation control strategy, a second investigation result is generated to characterize the vehicle control shutdown caused by parameter mutation.

[0081] If the second condition triggering parameter matches any of the matching conditions in the energy control strategy, a second investigation result is generated to characterize the energy strategy causing the vehicle control to stop.

[0082] In this embodiment of the invention, the vehicle control strategy includes an energy control strategy and a fault and parameter mutation control strategy. The condition triggering parameters include a first condition triggering parameter and a second condition triggering parameter, wherein the generation time of the first condition triggering parameter is earlier than the generation time of the second condition triggering parameter. That is, if the generation time of the second condition triggering parameter is time T, then the generation time of the first condition triggering parameter is time T-1. Since parameter mutations are sporadic events, such as rechargeable current and maximum hydrogen leakage, they may suddenly change or be lost in an instant. However, this state is not continuous and may recover after the fuel cell system shuts down. The state of the parameters that the energy control strategy needs to match will persist for a period of time. Therefore, the parameters used for matching the energy control strategy can be collected at the time of fuel cell shutdown or a time close to the shutdown time, i.e., the second condition triggering parameter. The parameters for the parameter mutation strategy need to be matched with the parameters generated before shutdown, i.e., the first condition triggering parameter, and the matching conditions in the fault and parameter mutation control strategy.

[0083] In one embodiment of the present invention, for further explanation and limitation, the step of determining the first investigation result based on the fault information includes:

[0084] For the system object, if the fault level in the fault information is greater than a preset level threshold, the system object is identified as a shutdown-related object, and a first investigation result is generated based on the fault information of the system object.

[0085] For the component object, if the fault type of the component object matches the shutdown-related fault type, then the component object is identified as a shutdown-related object, and a first investigation result is generated based on the fault information of the component object.

[0086] In this embodiment of the invention, candidate shutdown-related objects include system objects and component objects. Fault information includes fault level and fault type. For systemic faults, the fault information will correspond to a specific fault level; only higher-level faults will cause the fuel cell system to shut down. For example, the fault levels of hydrogen systems and fuel cell systems are divided into Level 1, Level 2, and Level 3, with severity increasing sequentially. When a Level 2 or Level 3 fault occurs in a hydrogen system or fuel cell system, it will cause the fuel cell system to shut down, but a Level 1 fault will not. Therefore, for system-type faults, the presence of a fault does not automatically determine its connection to a fuel cell system shutdown; rather, the fault level must be considered. For component faults, not all component faults will cause a shutdown. For example, faults in lithium batteries with little correlation to energy supply performance will not cause a fuel cell system shutdown. Therefore, it is necessary to consider the specific type of fault to see if the fault type is related to the fuel cell system shutdown, thereby determining whether the shutdown was caused by a component fault.

[0087] In one embodiment of the invention, for further explanation and limitation, before determining the shutdown diagnostic result of the fuel cell system based on the fault level and / or fault type, the matching result of the condition triggering parameters and the vehicle control strategy, the method further includes:

[0088] Obtain historical downtime and maintenance data of the fuel cell system, and extract component object maintenance data from the historical downtime and maintenance data;

[0089] Configure the component object fault corresponding to the component object maintenance data as a downtime associated fault type.

[0090] In this embodiment of the invention, since component failure does not necessarily lead to fuel cell system shutdown, it is necessary to pre-classify and organize the component failure types that could cause fuel cell system shutdown based on historical shutdown maintenance data, and summarize these failure types in a fault list. Fault types include different fault names, such as temperature faults and charging faults, as well as different fault degrees corresponding to the same fault name. Taking lithium batteries as an example, in the energy flow of the entire vehicle, the electricity generated by the fuel cell system can supply the vehicle and also be used to charge the lithium batteries. If the lithium battery fails, the fuel cell system may need to be shut down. However, to determine which specific types of faults and what degree of fault will lead to shutdown, more accurate data needs to be extracted from historical maintenance data to accurately determine whether the fuel cell system shutdown is caused by a component.

[0091] In one embodiment of the present invention, for further explanation and limitation, the step of generating prompt information indicating the type of shutdown fault based on the shutdown diagnosis results includes:

[0092] If the shutdown diagnosis result indicates a vehicle control shutdown, and the shutdown diagnosis result does not contain a shutdown-related object, then a prompt message indicating that the shutdown fault category is the first shutdown fault category is generated.

[0093] If the shutdown diagnosis result indicates a fault, a prompt message indicating that the shutdown fault category is the second shutdown fault category is generated.

[0094] In this embodiment of the invention, the first shutdown fault category represents non-repair-related recovery, and the second shutdown fault category represents repair-related recovery. When a fuel cell system shuts down, it may be due to a fault requiring repair, such as a fault in the fuel cell system, hydrogen system, or lithium battery, or it may be due to a fault that does not require repair intervention, such as a fault that can be resolved by injecting hydrogen or restarting the vehicle. Therefore, the recovery method can be categorized based on whether the vehicle currently has a fault. By classifying situations that require repair intervention and those that do not, vehicle drivers or troubleshooters can quickly identify the recovery method, thereby reducing troubleshooting time and improving efficiency.

[0095] In one embodiment of the present invention, for further explanation and limitation, the method further includes:

[0096] If the shutdown reason is other occasional reasons, then obtain the global fault information at the current moment;

[0097] The global fault information is sorted according to the association level between the fault subject and the fuel cell system to obtain a candidate fault sequence;

[0098] Based on the candidate fault sequence, a prompt message for the third shutdown fault category is generated.

[0099] In this embodiment of the invention, if the shutdown is due to other unforeseen causes, it indicates that the cause of the shutdown cannot be determined based solely on the fault information of the candidate associated objects. In this case, global fault information reported by various vehicle detection systems can be obtained to ensure the comprehensiveness of fault diagnosis. For ease of fault viewing, when there is a large amount of fault information, it can be sorted from largest to smallest according to the correlation between the fault location and the fuel cell system to obtain a candidate fault sequence. Among them, the third shutdown fault category is used to characterize key repair categories that require professional maintenance personnel to analyze and recover. If a shutdown-related object is identified from the candidate fault sequence after analysis, the candidate associated objects can be updated based on the shutdown-related object.

[0100] This invention provides a fault diagnosis method for fuel cell vehicles. In this embodiment, when the detection result of the fuel cell system operation is a shutdown state, at least one of the following is obtained: conditional trigger parameters of the vehicle control strategy and fault information of candidate associated objects. Based on the fault information and / or the matching result of the conditional trigger parameters with the vehicle control strategy, a shutdown diagnosis result of the fuel cell system is determined. The shutdown diagnosis result includes at least one of a shutdown cause and a shutdown associated object. The shutdown cause includes vehicle control shutdown, fault shutdown, and shutdown due to other occasional reasons. Based on the shutdown diagnosis result, a prompt message indicating the shutdown fault type is generated and sent to a target terminal. This significantly reduces the time and difficulty of troubleshooting fuel cell system shutdown causes while ensuring the accuracy of the troubleshooting, thereby greatly improving the efficiency of fuel cell system shutdown cause troubleshooting.

[0101] Furthermore, as a response to the above Figure 1 The implementation of the method shown in this invention provides a fault diagnosis device for fuel cell vehicles, such as... Figure 3 As shown, the device includes:

[0102] The acquisition module 31 is used to acquire the conditional trigger parameters of the vehicle control strategy and the fault information of the candidate associated objects when the detection result of the fuel cell system operation is a shutdown state.

[0103] The determination module 32 is used to determine the shutdown diagnosis result of the fuel cell system based on the fault information and / or the matching result of the condition triggering parameters and the vehicle control strategy. The shutdown diagnosis result includes at least one of the shutdown cause and the shutdown associated object. The shutdown cause includes vehicle control shutdown, fault shutdown, and other occasional shutdown.

[0104] The generation module 33 is used to generate a prompt message indicating the type of shutdown fault based on the shutdown diagnosis results, and send the prompt message to the target terminal.

[0105] Furthermore, the determining module 32 includes:

[0106] The first determining unit is used to determine a first investigation result based on the fault information. If the first investigation result contains a shutdown-related object, the shutdown cause of the shutdown diagnosis result is determined to be a fault shutdown.

[0107] The second determining unit is used to determine the second investigation result based on the matching result of the condition triggering parameter and the vehicle control strategy if the first investigation result does not contain a shutdown-related object; and to determine the shutdown cause of the shutdown diagnosis result as a vehicle control shutdown if the second investigation result indicates that the shutdown cause is a vehicle control shutdown.

[0108] The third determining unit is used to determine the shutdown cause of the shutdown diagnosis result as other occasional causes if the second investigation result indicates that the shutdown cause is a non-vehicle control shutdown.

[0109] Furthermore, in a specific application scenario, the second determining unit is specifically used to generate a second investigation result to characterize the vehicle control shutdown caused by parameter mutation if the first condition triggering parameter matches any matching condition in the fault and parameter mutation control strategy.

[0110] If the second condition triggering parameter matches any of the matching conditions in the energy control strategy, a second investigation result is generated to characterize the energy strategy causing the vehicle control to stop.

[0111] Furthermore, in a specific application scenario, the first determining unit is specifically used to determine the system object as a shutdown-related object if the fault level in the fault information is greater than a preset level threshold, and generate a first investigation result based on the fault information of the system object.

[0112] For the component object, if the fault type of the component object matches the shutdown-related fault type, then the component object is identified as a shutdown-related object, and a first investigation result is generated based on the fault information of the component object.

[0113] Furthermore, the device also includes:

[0114] The extraction module is used to acquire historical downtime and maintenance data of the fuel cell system and extract component object maintenance data from the historical downtime and maintenance data.

[0115] The configuration module is used to configure the component object fault corresponding to the component object maintenance data as a downtime associated fault type.

[0116] Furthermore, the generation module 33 includes:

[0117] The first generation unit is configured to generate a prompt message indicating that the shutdown fault category is a first shutdown fault category if the shutdown diagnosis result indicates a vehicle control shutdown and the shutdown diagnosis result does not contain a shutdown-related object. The first shutdown fault category indicates a non-repair type recovery.

[0118] The second generation unit is used to generate a prompt message indicating that the shutdown fault category is a second shutdown fault category if the shutdown diagnosis result indicates a fault, wherein the second shutdown fault category indicates a maintenance recovery.

[0119] Furthermore, the device also includes:

[0120] The acquisition module 31 is also used to acquire global fault information at the current moment if the shutdown reason is other occasional reasons.

[0121] The sorting module is used to sort the global fault information according to the association level between the fault subject of the global fault information and the fuel cell system to obtain a candidate fault sequence;

[0122] The generation module is used to generate a prompt message for a third shutdown fault category based on the candidate fault sequence.

[0123] This invention provides a fault diagnosis device for fuel cell vehicles. In embodiments of this invention, when the detection result of the fuel cell system operation is a shutdown state, at least one of the following is obtained: conditional trigger parameters of the vehicle control strategy and fault information of candidate associated objects. Based on the fault information and / or the matching result of the conditional trigger parameters with the vehicle control strategy, a shutdown diagnosis result of the fuel cell system is determined. The shutdown diagnosis result includes at least one of a shutdown cause and a shutdown associated object. The shutdown cause includes vehicle control shutdown, fault shutdown, and shutdown due to other occasional reasons. Based on the shutdown diagnosis result, a prompt message indicating the shutdown fault type is generated and sent to a target terminal. This significantly reduces the time and difficulty of troubleshooting fuel cell system shutdown causes while ensuring the accuracy of the troubleshooting, thereby greatly improving the efficiency of troubleshooting fuel cell system shutdown causes.

[0124] According to one embodiment of the present invention, a storage medium is provided, the storage medium storing at least one executable instruction, the computer-executable instruction being able to execute the fault diagnosis method for fuel cell vehicles in any of the above method embodiments.

[0125] Figure 4 The diagram shows a structural schematic of a terminal according to an embodiment of the present invention. The specific implementation of the terminal is not limited by the specific embodiments of the present invention.

[0126] like Figure 4 As shown, the terminal may include: a processor 402, a communications interface 404, a memory 406, and a communications bus 408.

[0127] The processor 402, communication interface 404, and memory 406 communicate with each other via communication bus 408.

[0128] Communication interface 404 is used to communicate with other network elements such as clients or other servers.

[0129] The processor 402 is used to execute program 410, specifically to perform the relevant steps in the above-described embodiment of the fault diagnosis method for fuel cell vehicles.

[0130] Specifically, program 410 may include program code that includes computer operation instructions.

[0131] Processor 402 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention. The terminal may include one or more processors of the same type, such as one or more CPUs; or it may include processors of different types, such as one or more CPUs and one or more ASICs.

[0132] Memory 406 is used to store program 410. Memory 406 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0133] Specifically, program 410 can be used to cause processor 402 to perform the following operations:

[0134] When the detection result of the fuel cell system operation is received as a shutdown state, at least one of the conditional trigger parameters of the vehicle control strategy and the fault information of the candidate associated objects is obtained;

[0135] The shutdown diagnosis result of the fuel cell system is determined based on the fault information and / or the matching result of the condition triggering parameters and the vehicle control strategy. The shutdown diagnosis result includes at least one of the shutdown cause and the shutdown associated object. The shutdown cause includes vehicle control shutdown, fault shutdown, and other occasional shutdown.

[0136] Based on the shutdown diagnosis results, a prompt message is generated to indicate the type of shutdown fault, and the prompt message is sent to the target terminal.

[0137] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. Optionally, they can be implemented using computer-executable program code, thereby storing them in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those presented herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0138] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A fault diagnosis method for a fuel cell vehicle, characterized in that, include: When the detection result of the fuel cell system operation is received as a shutdown state, at least one of the conditional trigger parameters of the vehicle control strategy and the fault information of the candidate associated objects is obtained; The shutdown diagnosis result of the fuel cell system is determined based on the fault information and / or the matching result of the condition triggering parameters and the vehicle control strategy. The shutdown diagnosis result includes at least one of the shutdown cause and the shutdown associated object. The shutdown cause includes vehicle control shutdown, fault shutdown, and other occasional shutdown. Based on the shutdown diagnosis results, a prompt message indicating the type of shutdown fault is generated and sent to the target terminal; The determination of the shutdown diagnosis result of the fuel cell system based on the fault information and / or the matching result of the condition triggering parameters with the vehicle control strategy includes: Based on the fault information, a first investigation result is determined. If the first investigation result contains a shutdown-related object, the shutdown cause of the shutdown diagnosis result is determined to be a fault shutdown. If the first investigation result does not contain a shutdown-related object, then the second investigation result is determined based on the matching result of the condition triggering parameter and the vehicle control strategy. If the second investigation result indicates that the shutdown reason is a vehicle control shutdown, then the shutdown reason of the shutdown diagnosis result is determined to be a vehicle control shutdown. If the second investigation result indicates that the shutdown cause is a non-vehicle control shutdown, then the shutdown diagnosis result is determined to be a shutdown caused by other occasional reasons.

2. The method according to claim 1, characterized in that, The vehicle control strategy includes an energy control strategy and a fault and parameter mutation control strategy. The conditional triggering parameters include a first conditional triggering parameter and a second conditional triggering parameter. If the first investigation result does not contain a shutdown-related object, the second investigation result is determined based on the matching result of the conditional triggering parameters and the vehicle control strategy, including: If the first condition triggering parameter matches any of the matching conditions in the fault and parameter mutation control strategy, a second investigation result is generated to characterize the vehicle control shutdown caused by parameter mutation. If the second condition triggering parameter matches any of the matching conditions in the energy control strategy, a second investigation result is generated to characterize the energy strategy causing the vehicle control to stop.

3. The method according to claim 1, characterized in that, The fault information should include the fault level and fault type; the candidate associated objects include system objects and component objects; and determining the first investigation result based on the fault information includes: For the system object, if the fault level in the fault information is greater than a preset level threshold, the system object is identified as a shutdown-related object, and a first investigation result is generated based on the fault information of the system object. For the component object, if the fault type of the component object matches the shutdown-related fault type, then the component object is identified as a shutdown-related object, and a first investigation result is generated based on the fault information of the component object.

4. The method according to claim 1, characterized in that, Before determining the shutdown diagnostic result of the fuel cell system based on the fault information and / or the matching result of the condition triggering parameters and the vehicle control strategy, the method further includes: Obtain historical downtime and maintenance data of the fuel cell system, and extract component object maintenance data from the historical downtime and maintenance data; Configure the component object fault corresponding to the component object maintenance data as a downtime associated fault type.

5. The method according to claim 1, characterized in that, The generation of prompt information indicating the type of shutdown fault based on the shutdown diagnosis results includes: If the shutdown diagnosis result indicates a vehicle control shutdown, and the shutdown diagnosis result does not contain a shutdown-related object, then a prompt message is generated indicating that the shutdown fault category is the first shutdown fault category, where the first shutdown fault category indicates a non-repair recovery. If the shutdown diagnosis result indicates a fault, a prompt message is generated indicating that the shutdown fault category is the second shutdown fault category, which indicates maintenance recovery.

6. The method according to any one of claims 1-5, characterized in that, The method further includes: If the shutdown reason is other occasional reasons, then obtain the global fault information at the current moment; The global fault information is sorted according to the association level between the fault subject and the fuel cell system to obtain a candidate fault sequence; Based on the candidate fault sequence, a prompt message for the third shutdown fault category is generated.

7. A fault diagnosis device for a fuel cell vehicle, the device being used to perform the operation corresponding to the fault diagnosis method for a fuel cell vehicle as described in any one of claims 1-6, characterized in that, include: The acquisition module is used to acquire the conditional trigger parameters of the vehicle control strategy and the fault information of the candidate associated objects when the detection result of the fuel cell system operation is a shutdown state. The determination module is used to determine the shutdown diagnosis result of the fuel cell system based on the fault information and / or the matching result of the condition triggering parameters and the vehicle control strategy. The shutdown diagnosis result includes at least one of the shutdown cause and the shutdown associated object. The shutdown cause includes vehicle control shutdown, fault shutdown, and other occasional shutdown. The generation module is used to generate a prompt message indicating the type of shutdown fault based on the shutdown diagnosis results, and send the prompt message to the target terminal.

8. A storage medium storing at least one executable instruction that causes a processor to perform an operation corresponding to the fault diagnosis method for a fuel cell vehicle as described in any one of claims 1-6.

9. A terminal, comprising: The processor, memory, communication interface, and communication bus are provided, wherein the processor, memory, and communication interface communicate with each other via the communication bus. The memory is used to store at least one executable instruction, which causes the processor to perform an operation corresponding to the fault diagnosis method for fuel cell vehicles as described in any one of claims 1-6.

Images