Fault diagnosis method and device for hydrogen storage system in vehicle, terminal equipment and vehicle

Abstract

The invention is suitable for the technical field of intelligent automobiles, and provides a fault diagnosis method and device for a hydrogen storage system in a vehicle, terminal equipment and the vehicle. The method comprises the steps that the pressure value in a medium-pressure pipeline and the current use state of the hydrogen storage system are obtained; determining a currently required fault diagnosis strategy according to the current use state of the hydrogen storage system, wherein the hydrogen storage system corresponds to different fault diagnosis strategies in different use states; and finally, obtaining a fault diagnosis result of the hydrogen storage system according to the detected pressure value and the determined fault diagnosis strategy. Whether the hydrogen storage system breaks down or not can be timely and accurately detected according to the pressure value in the medium-pressure pipeline, normal use of the vehicle is guaranteed, and potential safety hazards caused by the hydrogen storage system fault of the vehicle are avoided; besides, the hydrogen storage system corresponds to different fault diagnosis strategies in different use states, and whether the hydrogen storage system breaks down or not can be more accurately determined according to the current use state and the pressure value of the hydrogen storage system.

Description

Technical Field

[0001] The present application belongs to the field of intelligent vehicle technology, and in particular, relates to a fault diagnosis method, device, terminal equipment and vehicle for a hydrogen storage system in a vehicle. Background Art

[0002] With the diversification of vehicle fuels, some vehicles use hydrogen as fuel. For vehicles that use hydrogen as fuel, a hydrogen storage system needs to be installed in the vehicle to store hydrogen fuel. The hydrogen storage system supplies hydrogen to the fuel cell in the vehicle. The fuel cell mixes hydrogen with oxygen to generate electricity to provide power for the vehicle. If the hydrogen storage system in the vehicle fails, it will not only affect the operation of the vehicle, but also bring safety hazards to the vehicle. Therefore, timely and accurate detection of whether the hydrogen storage system is faulty is a problem that needs to be solved at present. Summary of the invention

[0003] The embodiments of the present application provide a method, apparatus, terminal device and vehicle for diagnosing a fault of a hydrogen storage system in a vehicle, which can timely and accurately detect whether a fault occurs in the hydrogen storage system.

[0004] In a first aspect, an embodiment of the present application provides a fault diagnosis method for a hydrogen storage system in a vehicle, wherein the vehicle includes a hydrogen storage system, the hydrogen storage system includes a hydrogen bottle, a pressure reducing device, and a medium-pressure pipeline, and the hydrogen in the hydrogen bottle enters the medium-pressure pipeline after being decompressed by the pressure reducing device, and the method includes:

[0005] Acquiring the pressure value in the medium-pressure pipeline and the current use status of the hydrogen storage system;

[0006] Determining a fault diagnosis strategy corresponding to the current use state according to the current use state, wherein the hydrogen storage system corresponds to different fault diagnosis strategies under different use states;

[0007] According to the pressure value and the fault diagnosis strategy corresponding to the current use status, the pressure in the medium-pressure pipeline is diagnosed to obtain a fault diagnosis result of the hydrogen storage system.

[0008] In a possible implementation manner of the first aspect, determining, according to the current use state, a fault diagnosis strategy corresponding to the current use state includes:

[0009] If the current usage status is the working status, the first fault diagnosis strategy is determined as the fault diagnosis strategy corresponding to the current usage status, wherein the first fault diagnosis strategy includes determining that the hydrogen storage system is in a fault state if the pressure value of the medium-pressure pipeline is greater than a first preset value; and determining that the hydrogen storage system is in a non-fault state if the pressure value of the medium-pressure pipeline is less than or equal to the first preset value, and the first preset value is determined based on the maximum output pressure value of the hydrogen storage system when it is in the working status.

[0010] In a possible implementation manner of the first aspect, determining, according to the current use state, a fault diagnosis strategy corresponding to the current use state includes:

[0011] If the current usage state is a non-working state, the second fault diagnosis strategy is determined as the fault diagnosis strategy corresponding to the current usage state, wherein the second fault diagnosis strategy includes if the pressure value of the medium-pressure pipeline is greater than a second preset value, then it is determined that the hydrogen storage system is in a fault state; if the pressure value of the medium-pressure pipeline is less than or equal to the second preset value, then it is determined that the hydrogen storage system is in a non-fault state, the second preset value is determined based on the maximum output pressure value of the hydrogen storage system when it is in the non-working state, and the first preset value is less than the second preset value.

[0012] In a possible implementation manner of the first aspect, the fault diagnosis result includes a fault diagnosis level;

[0013] After diagnosing the pressure in the medium-pressure pipeline according to the fault diagnosis strategy corresponding to the pressure value and the current use state to obtain the fault diagnosis result of the hydrogen storage system, the method further includes:

[0014] If the fault diagnosis level is the first preset level, fault reminder information is output, and the fault reminder information is used to remind the user that a fault occurs in the hydrogen storage system.

[0015] In a possible implementation manner of the first aspect, after diagnosing the pressure in the medium-pressure pipeline according to the fault diagnosis strategy corresponding to the pressure value and the current use state to obtain a fault diagnosis result of the hydrogen storage system, the method further includes:

[0016] If the fault diagnosis level is a second preset level, the vehicle is controlled to prohibit starting the hydrogen storage system.

[0017] In a possible implementation manner of the first aspect, the first fault diagnosis strategy further includes:

[0018] If the pressure value of the medium-pressure pipeline is in a first pressure interval, it is determined that the hydrogen storage system is in a fault state and the fault level is a first level, wherein the minimum value of the first pressure interval is the first preset value;

[0019] If the pressure value of the medium-pressure pipeline is in a second pressure interval, it is determined that the hydrogen storage system is in a fault state and the fault level is a second level, wherein the minimum value of the second pressure interval is greater than the maximum value of the first pressure interval, and the second level of fault level is higher than the first level of fault level;

[0020] If the pressure value of the medium-pressure pipeline is in the third pressure range, it is determined that the hydrogen storage system is in a fault state and the fault level is the third level, wherein the minimum value of the third pressure range is greater than the maximum value of the second pressure range, and the third level fault level is higher than the second level fault level.

[0021] In a possible implementation manner of the first aspect, the second fault diagnosis strategy further includes:

[0022] If the pressure value of the medium-pressure pipeline is in a fourth pressure interval, it is determined that the hydrogen storage system is in a fault state and the fault level is a fourth level, wherein the minimum value of the fourth pressure interval is the second preset value;

[0023] If the pressure value of the medium-pressure pipeline is in the fifth pressure interval, it is determined that the hydrogen storage system is in a fault state and the fault level is the fifth level, wherein the minimum value of the fifth pressure interval is greater than the maximum value of the fourth pressure interval, and the fifth level of fault level is higher than the fourth level of fault level;

[0024] If the pressure value of the medium-pressure pipeline is in the sixth pressure interval, it is determined that the hydrogen storage system is in a fault state and the fault level is the sixth level, wherein the minimum value of the sixth pressure interval is greater than the maximum value of the fifth pressure interval, and the sixth level fault level is higher than the fourth level fault level.

[0025] In a second aspect, an embodiment of the present application provides a fault diagnosis device for a hydrogen storage system in a vehicle, wherein the vehicle includes a hydrogen storage system, the hydrogen storage system includes a hydrogen bottle, a pressure reducing device and a medium-pressure pipeline, the hydrogen in the hydrogen bottle is decompressed by the pressure reducing device and enters the medium-pressure pipeline, and the device includes:

[0026] A status acquisition module, used to acquire the pressure value in the medium-pressure pipeline and the current use status of the hydrogen storage system;

[0027] A strategy determination module, used to determine the fault diagnosis strategy corresponding to the current use state according to the current use state, wherein the hydrogen storage system corresponds to different fault diagnosis strategies under different use states;

[0028] The result output module is used to diagnose the pressure in the medium-pressure pipeline according to the pressure value and the fault diagnosis strategy corresponding to the current use status, so as to obtain the fault diagnosis result of the hydrogen storage system.

[0029] In a third aspect, an embodiment of the present application provides a terminal device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the fault diagnosis method for the hydrogen storage system in the vehicle described in any one of the first aspects above is implemented.

[0030] In a fourth aspect, an embodiment of the present application provides a vehicle, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the fault diagnosis method for the hydrogen storage system in the vehicle described in any one of the first aspects above is implemented.

[0031] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the fault diagnosis method for the hydrogen storage system in a vehicle described in any one of the above-mentioned first aspects is implemented.

[0032] In a sixth aspect, an embodiment of the present application provides a computer program product, which, when executed on a terminal device, enables the terminal device to execute the fault diagnosis method for a hydrogen storage system in a vehicle as described in any one of the first aspects above.

[0033] Compared with the prior art, the beneficial effects of the first aspect of the embodiment of the present application are as follows: in the present application, the pressure value in the medium-pressure pipeline and the current use status of the hydrogen storage system are first obtained; the currently required fault diagnosis strategy is determined according to the current use status of the hydrogen storage system, and the hydrogen storage system corresponds to different fault diagnosis strategies under different use statuses; finally, the fault diagnosis result of the hydrogen storage system is obtained according to the detected pressure value and the determined fault diagnosis strategy. Since the pressure of the medium-pressure pipeline not only affects the use of the vehicle, but also affects the safety of the vehicle, the present application can timely and accurately detect whether the hydrogen storage system has a fault through the size of the pressure value in the medium-pressure pipeline, thereby ensuring the normal use of the vehicle and avoiding the safety hazards of the vehicle due to the failure of the hydrogen storage system; in addition, the hydrogen storage system of the present application corresponds to different fault diagnosis strategies under different use statuses, and according to the current use status and pressure value of the hydrogen storage system, it can more accurately determine whether the hydrogen storage system has a fault.

[0034] It can be understood that the beneficial effects of the second to sixth aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0036] Figure 1 It is a flow chart of a fault diagnosis method of a hydrogen storage system in a vehicle provided by an embodiment of the present application;

[0037] Figure 2 It is a structural schematic diagram of a fault diagnosis device for a hydrogen storage system in a vehicle provided by an embodiment of the present application;

[0038] Figure 3 It is a structural diagram of a terminal device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0039] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0040] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0041] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0042] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0043] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. appearing in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways.

[0044] For vehicles that use hydrogen as fuel, a hydrogen storage system must be installed in the vehicle to store hydrogen. When the vehicle is running, the hydrogen storage system supplies hydrogen to the fuel cell, and the fuel cell generates electricity after the hydrogen and oxygen are mixed and reacted. The electricity drives the electric motor in the vehicle to run, thereby realizing the operation of the vehicle.

[0045] Since hydrogen is a flammable and explosive gas, ensuring the safety of hydrogen is a prerequisite for vehicle operation, and the hydrogen storage system is the main storage system for hydrogen in the vehicle. If the hydrogen storage system fails, it will not only affect the fuel cell, but also bring safety hazards to the entire vehicle. Therefore, detecting whether there is a fault in the hydrogen storage system and discovering the fault in the hydrogen storage system in time can ensure the normal and safe operation of the vehicle.

[0046] Since the hydrogen storage system includes a hydrogen bottle, a pressure reducing device and a medium-pressure pipeline, the hydrogen in the hydrogen bottle enters the medium-pressure pipeline after being reduced in pressure by the pressure reducing device. The medium-pressure pipeline is connected to the fuel cell, and the reduced-pressure hydrogen enters the fuel cell through the medium-pressure pipeline. Based on this connection structure, the inventor found that the pressure in the medium-pressure pipeline affects the operation of the vehicle. If the pressure in the medium-pressure pipeline is relatively large, the continuous high pressure will damage the components in the medium-pressure pipeline and the components connected to the medium-pressure pipeline. In addition, if the hydrogen at a relatively high pressure enters the fuel cell, the high-pressure hydrogen will not only cause damage to the fuel cell, but also accelerate the electrochemical reaction, so that the fuel cell outputs more electricity in a shorter time, affecting the normal use of the vehicle; moreover, once the components and fuel cells in the medium-pressure pipeline are damaged, hydrogen leakage may occur, which brings safety hazards to the vehicle. Therefore, one method for fault detection of the hydrogen storage system can be pressure detection of the medium-pressure pipeline.

[0047] The following specifically introduces a fault diagnosis method for a hydrogen storage system in a vehicle proposed by the present application. A pressure threshold is preset. If the pressure value in the medium-pressure pipeline is greater than the pressure threshold, it is determined that the pressure in the medium-pressure pipeline is high and there is a fault in the hydrogen storage system. If the pressure value in the medium-pressure pipeline is less than or equal to the pressure threshold, it is determined that the pressure in the medium-pressure pipeline is normal and there is no fault in the hydrogen storage system.

[0048] Specific methods include:

[0049] Obtain the pressure value of the medium-pressure pipeline.

[0050] If the pressure value is greater than the pressure threshold, it is determined that there is a fault in the hydrogen storage system.

[0051] If the pressure value is less than or equal to the pressure threshold, it is determined that there is no fault in the hydrogen storage system.

[0052] In this embodiment, since the maximum output pressure N of the medium-pressure pipeline in the working state is less than the maximum output pressure Y in the non-working state, therefore, the pressure threshold can be determined according to the maximum output pressure in the non-working state, so that there is a relatively wide range for the pressure determination of the medium-pressure pipeline. For example, the pressure threshold can be the maximum output pressure Y of the medium-pressure pipeline in the non-working state.

[0053] In another embodiment, different pressure threshold intervals can be set, and different pressure threshold intervals correspond to different fault levels.

[0054] Specifically, if the pressure value of the medium-pressure pipeline is in the first pressure threshold interval (Y - a ≤ PR < Y - b), it is determined that there is a fault in the hydrogen storage system and the fault level is a minor fault. PR is the pressure value detected in the medium-pressure pipeline being monitored, and both a and b are constants.

[0055] If the pressure value of the medium-pressure pipeline is in the second pressure threshold interval (Y - b ≤ PR < Y), it is determined that there is a fault in the hydrogen storage system and the fault level is a moderate fault.

[0056] If the pressure value of the medium-pressure pipeline is in the third pressure threshold interval (PR ≥ Y), it is determined that there is a fault in the hydrogen storage system and the fault level is a severe fault.

[0057] As an example, if the pressure value in the medium-pressure pipeline is h and h < Y - a, it is determined that the pressure in the medium-pressure pipeline is normal and there is no fault in the hydrogen storage system.

[0058] The inventor found that since the maximum output pressure of the medium-pressure pipeline (i.e., the hydrogen storage system) in the working state is different from that in the non-working state, and the maximum output pressure of the medium-pressure pipeline in the working state is less than that in the non-working state; if the above method is used to detect whether there is a fault in the hydrogen storage system, since the pressure threshold is set according to the maximum output pressure in the non-working state, the set range of the pressure threshold is relatively wide, resulting in that when the medium-pressure pipeline is in the working state, if the pressure value is greater than the maximum output pressure in the working state, it cannot be accurately detected, that is, the fault of the medium-pressure pipeline in the working state cannot be accurately detected.

[0059] Based on the problems existing in the above-mentioned method, the present application proposes another fault diagnosis method for the hydrogen storage system in a vehicle. The method takes into account the usage status of the hydrogen storage system and sets the pressure judgment thresholds of the hydrogen storage system in the working state and the non-working state separately. The fault judgment strategies of hydrogen storage systems in different usage states are different, so that the final fault judgment result of the hydrogen storage system is more accurate.

[0060] Refer to the following Figure 1 , the method is described in detail as follows:

[0061] S101, obtaining the pressure value in the medium-pressure pipeline and the current use status of the hydrogen storage system.

[0062] In this embodiment, the pressure value of the medium-pressure pipeline is detected by a pressure sensor, wherein the pressure sensor can be arranged at the rear end of the pressure reducing device.

[0063] The current use state of the hydrogen storage system can be determined by the opening and closing state of the pressure reducing valve in the pressure reducing device. If the opening and closing state of the pressure reducing valve is a locked state, it is determined that the hydrogen storage system is in a non-working state; if the opening and closing state of the pressure reducing valve is an open state, it is determined that the hydrogen storage system is in a working state.

[0064] The current use status of the hydrogen storage system is a working state or a non-working state.

[0065] S102, determining a fault diagnosis strategy corresponding to the current use state according to the current use state, wherein the hydrogen storage system corresponds to different fault diagnosis strategies under different use states.

[0066] In this embodiment, since the present application determines whether the hydrogen storage system is faulty based on the pressure of the medium-pressure pipeline, different pressure thresholds are set in different fault diagnosis strategies. Fault diagnosis strategies corresponding to different use states are pre-stored.

[0067] S103, diagnosing the pressure in the medium-pressure pipeline according to the pressure value and the fault diagnosis strategy corresponding to the current use state, to obtain a fault diagnosis result of the hydrogen storage system.

[0068] In this embodiment, if the pressure value satisfies the pressure in the non-fault state in the fault diagnosis strategy, the fault diagnosis result of the hydrogen storage system is determined to be a non-fault state. If the pressure value satisfies the pressure in the fault state in the fault diagnosis strategy, the fault diagnosis result of the hydrogen storage system is determined to be a fault state.

[0069] In the present application, the pressure value in the medium-pressure pipeline and the current use status of the hydrogen storage system are first obtained; the currently required fault diagnosis strategy is determined according to the current use status of the hydrogen storage system, and the hydrogen storage system corresponds to different fault diagnosis strategies under different use statuses; finally, the fault diagnosis result of the hydrogen storage system is obtained according to the detected pressure value and the determined fault diagnosis strategy. Since the pressure of the medium-pressure pipeline not only affects the use of the vehicle, but also affects the safety of the vehicle, the present application can timely and accurately detect whether the hydrogen storage system has a fault by the size of the pressure value in the medium-pressure pipeline, thereby ensuring the normal use of the vehicle and avoiding the safety hazards of the vehicle caused by the failure of the hydrogen storage system; in addition, the hydrogen storage system of the present application corresponds to different fault diagnosis strategies under different use statuses, and according to the current use status and pressure value of the hydrogen storage system, it can more accurately determine whether the hydrogen storage system has a fault.

[0070] The following describes in detail the fault diagnosis strategies under different working conditions.

[0071] When the hydrogen storage system is in working state, the pressure threshold is determined according to the maximum output pressure value of the hydrogen storage system in working state, which is recorded as the first preset value; by comparing the pressure value of the medium pressure pipeline obtained at the current moment with the first preset value, the fault diagnosis result of the hydrogen storage system is determined. Specifically, the implementation process of step S102 may include:

[0072] If the current usage status is the working status, the first fault diagnosis strategy is determined as the fault diagnosis strategy corresponding to the current usage status, wherein the first fault diagnosis strategy includes determining that the hydrogen storage system is in a fault state if the pressure value of the medium-pressure pipeline is greater than a first preset value; and determining that the hydrogen storage system is in a non-fault state if the pressure value of the medium-pressure pipeline is less than or equal to the first preset value, and the first preset value is determined based on the maximum output pressure value of the hydrogen storage system when it is in the working status.

[0073] In one embodiment, the first preset value may be a maximum output pressure value when the hydrogen storage system is in a working state.

[0074] In another embodiment, the first preset value may be the maximum output pressure value when the hydrogen storage system is in working state minus the correction value, for example, the first preset value = the maximum output pressure value N when the hydrogen storage system is in working state - the first correction value d, and the first correction value is set as needed.

[0075] For example, the first correction value can be set according to the current ambient temperature, and different ambient temperatures correspond to different first correction values. Specifically, the current ambient temperature of the vehicle's current environment is obtained, and the first correction value corresponding to the current ambient temperature is found. The maximum output pressure value is corrected using the first correction value corresponding to the ambient temperature, taking into account the influence of the ambient temperature on the medium-pressure pipeline, so that the determined first preset value is more in line with the current environment, thereby making the final fault diagnosis result of the hydrogen storage system more accurate.

[0076] In another embodiment, the first preset value is determined according to the maximum output pressure value when the hydrogen storage system is in operation and in a non-fault state during a historical period of time.

[0077] Specifically, each historical pressure value in the medium-pressure pipeline collected at a preset frequency during a historical time period is obtained, and the hydrogen storage system is in a working state and a non-fault state during the historical time period. The average of each historical pressure value is calculated to obtain a first preset value. Alternatively, the average of each historical pressure value is calculated, and the first correction value is subtracted from the average to obtain the first preset value.

[0078] When the hydrogen storage system is in a non-operating state, a pressure threshold is determined according to the maximum output pressure value of the hydrogen storage system when it is in a non-operating state, which is recorded as a second preset value; by comparing the pressure value of the medium-pressure pipeline obtained at the current moment with the second preset value, a fault diagnosis result of the hydrogen storage system is determined. Specifically, the implementation process of step S102 may include:

[0079] If the current usage state is a non-working state, the second fault diagnosis strategy is determined as the fault diagnosis strategy corresponding to the current usage state, wherein the second fault diagnosis strategy includes if the pressure value of the medium-pressure pipeline is greater than a second preset value, then it is determined that the hydrogen storage system is in a fault state; if the pressure value of the medium-pressure pipeline is less than or equal to the second preset value, then it is determined that the hydrogen storage system is in a non-fault state, the second preset value is determined based on the maximum output pressure value of the hydrogen storage system when it is in the non-working state, and the first preset value is less than the second preset value.

[0080] In one embodiment, the second preset value may be a maximum output pressure value when the hydrogen storage system is in a non-operating state.

[0081] In another embodiment, the second preset value may be the maximum output pressure value when the hydrogen storage system is in a non-working state minus the second correction value. For example, the second preset value = the maximum output pressure value Y when the hydrogen storage system is in a non-working state - the second correction value D. The second correction value is set as needed.

[0082] For example, the second correction value can be set according to the current ambient temperature, and different ambient temperatures correspond to different second correction values. Specifically, the current ambient temperature of the vehicle's current environment is obtained, and the second correction value corresponding to the current ambient temperature is found. The maximum output pressure value is corrected using the second correction value corresponding to the ambient temperature, taking into account the influence of the ambient temperature on the medium-pressure pipeline, so that the determined second preset value is more in line with the current environment, thereby making the final fault diagnosis result of the hydrogen storage system more accurate.

[0083] In another embodiment, the second preset value is determined according to the maximum output pressure value when the hydrogen storage system is in a non-operating and non-faulty state during a historical time period.

[0084] Specifically, each historical pressure value in the medium-pressure pipeline collected at a preset frequency during a historical time period is obtained, and the hydrogen storage system is in a non-working state and a non-fault state during the historical time period. The average of each historical pressure value is calculated to obtain a second preset value. Alternatively, the average of each historical pressure value is calculated, and the second correction value is subtracted from the average to obtain the second preset value.

[0085] In the present application, the pressure threshold of the hydrogen storage system in different usage states is determined based on the physical characteristics of the pressure reducing device, that is, the maximum pressure value of the hydrogen storage system after pressure reduction. Whether the hydrogen storage system is faulty is judged based on the determined pressure threshold and the usage state of the hydrogen storage system. This can make the judged state of the hydrogen storage system more consistent with the usage state of the hydrogen storage system and make the determined fault diagnosis result more accurate.

[0086] In a possible implementation, after determining that a fault exists in the hydrogen storage system, the fault level may be evaluated so as to control the vehicle to perform different actions according to different fault levels.

[0087] Specifically, when the hydrogen storage system is in working state, the first fault diagnosis strategy may also include:

[0088] If the pressure value of the medium-pressure pipeline is in a first pressure interval, it is determined that the hydrogen storage system is in a fault state and the fault level is a first level, wherein the minimum value of the first pressure interval is the first preset value.

[0089] If the pressure value of the medium-pressure pipeline is in the second pressure range, it is determined that the hydrogen storage system is in a fault state and the fault level is the second level, wherein the minimum value of the second pressure range is greater than the maximum value of the first pressure range, and the second level fault level is higher than the first level fault level.

[0090] If the pressure value of the medium-pressure pipeline is in the third pressure range, it is determined that the hydrogen storage system is in a fault state and the fault level is the third level, wherein the minimum value of the third pressure range is greater than the maximum value of the second pressure range, and the third level fault level is higher than the second level fault level.

[0091] As an example, the first pressure interval may be [Nd, Ne), the second pressure interval may be [Ne, N), and the third pressure interval may be greater than or equal to N. Wherein, N is the maximum output pressure value of the hydrogen storage system when it is in the working state, and the first preset value may be Nd. d and e are constants.

[0092] If the hydrogen storage system is in working state, the pressure value in the medium pressure pipeline is h, if N<h<Ya, the hydrogen storage system is in fault state, and the fault level is level 3. If Ne<h<N, the hydrogen storage system is in fault state, and the fault level is level 2. If Nd<h<Ne, the hydrogen storage system is in fault state, and the fault level is level 1.

[0093] The first level is a minor fault, the second level is a moderate fault, and the third level is a severe fault.

[0094] Specifically, when the hydrogen storage system is in a non-working state, the second fault diagnosis strategy may also include:

[0095] If the pressure value of the medium pressure pipeline is in a fourth pressure interval, it is determined that the hydrogen storage system is in a fault state and the fault level is a fourth level, wherein the minimum value of the fourth pressure interval is the second preset value.

[0096] If the pressure value of the medium-pressure pipeline is in the fifth pressure interval, it is determined that the hydrogen storage system is in a fault state and the fault level is the fifth level, wherein the minimum value of the fifth pressure interval is greater than the maximum value of the fourth pressure interval, and the fifth level fault level is higher than the fourth level fault level.

[0097] If the pressure value of the medium-pressure pipeline is in the sixth pressure interval, it is determined that the hydrogen storage system is in a fault state and the fault level is the sixth level, wherein the minimum value of the sixth pressure interval is greater than the maximum value of the fifth pressure interval, and the sixth level fault level is higher than the fourth level fault level.

[0098] As an example, the fourth pressure interval may be [Ya, Yb), the fifth pressure interval may be [Yb, Y), and the sixth pressure interval may be greater than or equal to Y. Wherein Y is the maximum output pressure value when the hydrogen storage system is in a non-working state. The second preset value may be Ya, where a and b are constants.

[0099] The fourth level is a minor fault, the fifth level is a moderate fault, and the sixth level is a severe fault.

[0100] In order to perform different and diverse controls on the vehicle, processing strategies corresponding to different fault levels are pre-set, and the vehicle is controlled according to the determined fault level, wherein the fault diagnosis result includes the fault diagnosis level, and the fault diagnosis level can be output in the form of a fault code, and different fault diagnosis levels correspond to different fault codes.

[0101] Specifically, if the fault diagnosis level is the first preset level, fault reminder information is output, and the fault reminder information is used to prompt the user that a fault occurs in the hydrogen storage system.

[0102] If the fault diagnosis level is the second preset level, the vehicle is controlled to prohibit starting the hydrogen storage system. Alternatively, if the fault diagnosis level is the second preset level, fault reminder information is output to control the vehicle to prohibit starting the hydrogen storage system.

[0103] In this embodiment, since the first level and the fourth level are minor faults, when the hydrogen storage system is in a minor fault, the hydrogen storage system can continue to be used so that the vehicle can continue to operate. Therefore, the first preset level can be the first level and the fourth level.

[0104] Since the second and fifth levels are moderate faults, and the third and sixth levels are severe faults, when the vehicle is in a moderate fault or severe fault, the hydrogen storage system may be stopped to ensure vehicle safety. Therefore, the second preset level may be the second, third, fifth, and sixth levels.

[0105] In another embodiment, when the hydrogen storage system is at the second level and the fifth level, fault reminder information is output, and the fault reminder information is used to prompt the user that the hydrogen storage system has a fault, and to remind the user that the hydrogen storage system will be prohibited from use after a first preset time period, so that the user can drive the vehicle to a vehicle repair shop or park on the side of the road, etc.

[0106] When the hydrogen storage system is at the third level and the sixth level, a fault reminder message is output, and the fault reminder message is used to remind the user that the hydrogen storage system has a fault and remind the user that the hydrogen storage system will be prohibited from use after a second preset time, so that the user can park the vehicle by the side of the road. The second preset time is shorter than the first preset time.

[0107] In one embodiment, the first preset duration can also be determined based on the distance between the current location of the vehicle and the nearest repair shop. Specifically, find the repair shop closest to the current location of the vehicle. Plan a driving route for the vehicle to the nearest repair shop. Determine the predicted duration required for the vehicle to travel to the nearest repair shop based on the driving route. Determine the first preset duration based on the predicted duration. Specifically, add the predicted duration to the third preset duration to obtain the first preset duration so that the vehicle has sufficient time to travel to the repair shop, and the third preset duration is set as needed.

[0108] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0109] Corresponding to the fault diagnosis method of the hydrogen storage system in the vehicle described in the above embodiment, Figure 2 A structural block diagram of a fault diagnosis device for a hydrogen storage system in a vehicle provided in an embodiment of the present application is shown. For ease of explanation, only the parts related to the embodiment of the present application are shown.

[0110] Reference Figure 2 The device 100 may include: a state acquisition module 210, a strategy determination module 220 and a result output module 230.

[0111] The state acquisition module 210 is used to acquire the pressure value in the medium-pressure pipeline and the current use state of the hydrogen storage system;

[0112] A strategy determination module 220, configured to determine a fault diagnosis strategy corresponding to the current use state according to the current use state, wherein the hydrogen storage system corresponds to different fault diagnosis strategies under different use states;

[0113] The result output module 230 is used to diagnose the pressure in the medium-pressure pipeline according to the pressure value and the fault diagnosis strategy corresponding to the current use status, so as to obtain the fault diagnosis result of the hydrogen storage system.

[0114] In a possible implementation, the policy determination module 220 may be specifically configured to:

[0115] If the current usage status is the working status, the first fault diagnosis strategy is determined as the fault diagnosis strategy corresponding to the current usage status, wherein the first fault diagnosis strategy includes determining that the hydrogen storage system is in a fault state if the pressure value of the medium-pressure pipeline is greater than a first preset value; and determining that the hydrogen storage system is in a non-fault state if the pressure value of the medium-pressure pipeline is less than or equal to the first preset value, and the first preset value is determined based on the maximum output pressure value of the hydrogen storage system when it is in the working status.

[0116] In a possible implementation, the policy determination module 220 may be specifically configured to:

[0117] If the current usage state is a non-working state, the second fault diagnosis strategy is determined as the fault diagnosis strategy corresponding to the current usage state, wherein the second fault diagnosis strategy includes if the pressure value of the medium-pressure pipeline is greater than a second preset value, then it is determined that the hydrogen storage system is in a fault state; if the pressure value of the medium-pressure pipeline is less than or equal to the second preset value, then it is determined that the hydrogen storage system is in a non-fault state, the second preset value is determined based on the maximum output pressure value of the hydrogen storage system when it is in the non-working state, and the first preset value is less than the second preset value.

[0118] In a possible implementation, the fault diagnosis result includes a fault diagnosis level; and the result output module 230 is also connected to:

[0119] The information output module is used to output fault reminder information if the fault diagnosis level is the first preset level, and the fault reminder information is used to remind the user that the hydrogen storage system has a fault.

[0120] In a possible implementation, the result output module 230 is also connected to:

[0121] The mode switching module is used to control the vehicle to prohibit starting the hydrogen storage system if the fault diagnosis level is a second preset level.

[0122] In a possible implementation, the first fault diagnosis strategy further includes:

[0123] If the pressure value of the medium-pressure pipeline is in a first pressure interval, it is determined that the hydrogen storage system is in a fault state and the fault level is a first level, wherein the minimum value of the first pressure interval is the first preset value;

[0124] If the pressure value of the medium-pressure pipeline is in a second pressure interval, it is determined that the hydrogen storage system is in a fault state and the fault level is a second level, wherein the minimum value of the second pressure interval is greater than the maximum value of the first pressure interval, and the second level of fault level is higher than the first level of fault level;

[0125] If the pressure value of the medium-pressure pipeline is in the third pressure range, it is determined that the hydrogen storage system is in a fault state and the fault level is the third level, wherein the minimum value of the third pressure range is greater than the maximum value of the second pressure range, and the third level fault level is higher than the second level fault level.

[0126] In a possible implementation, the second fault diagnosis strategy further includes:

[0127] If the pressure value of the medium-pressure pipeline is in a fourth pressure interval, it is determined that the hydrogen storage system is in a fault state and the fault level is a fourth level, wherein the minimum value of the fourth pressure interval is the second preset value;

[0128] If the pressure value of the medium-pressure pipeline is in the fifth pressure interval, it is determined that the hydrogen storage system is in a fault state and the fault level is the fifth level, wherein the minimum value of the fifth pressure interval is greater than the maximum value of the fourth pressure interval, and the fifth level of fault level is higher than the fourth level of fault level;

[0129] If the pressure value of the medium-pressure pipeline is in the sixth pressure interval, it is determined that the hydrogen storage system is in a fault state and the fault level is the sixth level, wherein the minimum value of the sixth pressure interval is greater than the maximum value of the fifth pressure interval, and the sixth level fault level is higher than the fourth level fault level.

[0130] It should be noted that the information interaction, execution process, etc. between the above-mentioned devices / units are based on the same concept as the method embodiment of the present application. Their specific functions and technical effects can be found in the method embodiment part and will not be repeated here.

[0131] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0132] An embodiment of the present application also provides a vehicle, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements a fault diagnosis method for a hydrogen storage system in the above-mentioned vehicle when executing the computer program.

[0133] The present application also provides a terminal device, see Figure 3 The terminal device 400 may include: at least one processor 410, a memory 420, and a computer program stored in the memory 420 and executable on the at least one processor 410. When the processor 410 executes the computer program, the steps in any of the above-mentioned method embodiments are implemented, for example Figure 1 Steps S101 to S103 in the illustrated embodiment. Alternatively, when the processor 410 executes the computer program, the functions of each module / unit in the above-mentioned device embodiments are implemented, for example Figure 2 The functions of the status acquisition module 210 to the result output module 230 are shown.

[0134] Exemplarily, the computer program may be divided into one or more modules / units, one or more modules / units are stored in the memory 420, and executed by the processor 410 to complete the present application. The one or more modules / units may be a series of computer program segments capable of completing specific functions, and the program segments are used to describe the execution process of the computer program in the terminal device 400.

[0135] Those skilled in the art will understand that Figure 3 It is only an example of a terminal device and does not constitute a limitation on the terminal device. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components, such as input and output devices, network access devices, buses, etc.

[0136] The processor 410 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0137] The memory 420 may be an internal storage unit of the terminal device, or an external storage device of the terminal device, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. The memory 420 is used to store the computer program and other programs and data required by the terminal device. The memory 420 may also be used to temporarily store data that has been output or is to be output.

[0138] The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of the present application is not limited to only one bus or one type of bus.

[0139] The fault diagnosis method for the hydrogen storage system in a vehicle provided in the embodiment of the present application can be applied to terminal devices such as computers, tablet computers, laptops, netbooks, personal digital assistants (PDAs), etc. The embodiment of the present application does not impose any restrictions on the specific type of terminal devices.

[0140] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0141] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0142] In the embodiments provided in the present application, it should be understood that the disclosed terminal equipment, devices and methods can be implemented in other ways. For example, the terminal equipment embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0143] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0144] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0145] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and when the computer program is executed by one or more processors, the steps of each of the above-mentioned method embodiments can be implemented.

[0146] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and when the computer program is executed by one or more processors, the steps of each of the above-mentioned method embodiments can be implemented.

[0147] Similarly, as a computer program product, when the computer program product runs on a terminal device, the terminal device can implement the steps in the above-mentioned method embodiments when executing the computer program product.

[0148] The computer program includes computer program code, which may be in source code form, object code form, executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the computer readable medium may be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer readable media do not include electric carrier signals and telecommunication signals.

[0149] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A fault diagnosis method for a hydrogen storage system in a vehicle, characterized in that: The vehicle includes a hydrogen storage system, the hydrogen storage system includes a hydrogen bottle, a pressure reducing device and a medium-pressure pipeline, the hydrogen in the hydrogen bottle is decompressed by the pressure reducing device and then enters the medium-pressure pipeline, and the method includes: Acquiring the pressure value in the medium-pressure pipeline and the current use status of the hydrogen storage system; Determining a fault diagnosis strategy corresponding to the current use state according to the current use state, wherein the hydrogen storage system corresponds to different fault diagnosis strategies under different use states; According to the pressure value and the fault diagnosis strategy corresponding to the current use status, the pressure in the medium-pressure pipeline is diagnosed to obtain a fault diagnosis result of the hydrogen storage system.

2. The fault diagnosis method of the hydrogen storage system in a vehicle according to claim 1, characterized in that: The determining, according to the current use state, a fault diagnosis strategy corresponding to the current use state includes: If the current usage status is the working status, the first fault diagnosis strategy is determined as the fault diagnosis strategy corresponding to the current usage status, wherein the first fault diagnosis strategy includes determining that the hydrogen storage system is in a fault state if the pressure value of the medium-pressure pipeline is greater than a first preset value; and determining that the hydrogen storage system is in a non-fault state if the pressure value of the medium-pressure pipeline is less than or equal to the first preset value, and the first preset value is determined based on the maximum output pressure value of the hydrogen storage system when it is in the working status.

3. The fault diagnosis method of the hydrogen storage system in a vehicle as claimed in claim 2, characterized in that: The determining, according to the current use state, a fault diagnosis strategy corresponding to the current use state includes: If the current usage state is a non-working state, the second fault diagnosis strategy is determined as the fault diagnosis strategy corresponding to the current usage state, wherein the second fault diagnosis strategy includes if the pressure value of the medium-pressure pipeline is greater than a second preset value, then it is determined that the hydrogen storage system is in a fault state; if the pressure value of the medium-pressure pipeline is less than or equal to the second preset value, then it is determined that the hydrogen storage system is in a non-fault state, the second preset value is determined based on the maximum output pressure value of the hydrogen storage system when it is in the non-working state, and the first preset value is less than the second preset value.

4. The fault diagnosis method of the hydrogen storage system in a vehicle as claimed in claim 1, characterized in that: The fault diagnosis result includes a fault diagnosis level; After diagnosing the pressure in the medium-pressure pipeline according to the fault diagnosis strategy corresponding to the pressure value and the current use state to obtain the fault diagnosis result of the hydrogen storage system, the method further includes: If the fault diagnosis level is the first preset level, fault reminder information is output, and the fault reminder information is used to remind the user that a fault occurs in the hydrogen storage system.

5. The fault diagnosis method of the hydrogen storage system in a vehicle as claimed in claim 4, characterized in that: After diagnosing the pressure in the medium-pressure pipeline according to the fault diagnosis strategy corresponding to the pressure value and the current use state to obtain the fault diagnosis result of the hydrogen storage system, the method further includes: If the fault diagnosis level is a second preset level, the vehicle is controlled to prohibit starting the hydrogen storage system.

6. The fault diagnosis method of the hydrogen storage system in a vehicle as claimed in claim 2, characterized in that: The first fault diagnosis strategy also includes: If the pressure value of the medium-pressure pipeline is in a first pressure interval, it is determined that the hydrogen storage system is in a fault state and the fault level is a first level, wherein the minimum value of the first pressure interval is the first preset value; If the pressure value of the medium-pressure pipeline is in a second pressure interval, it is determined that the hydrogen storage system is in a fault state and the fault level is a second level, wherein the minimum value of the second pressure interval is greater than the maximum value of the first pressure interval, and the second level of fault level is higher than the first level of fault level; If the pressure value of the medium-pressure pipeline is in the third pressure range, it is determined that the hydrogen storage system is in a fault state and the fault level is the third level, wherein the minimum value of the third pressure range is greater than the maximum value of the second pressure range, and the third level fault level is higher than the second level fault level.

7. The fault diagnosis method of the hydrogen storage system in a vehicle as claimed in claim 3, characterized in that: The second fault diagnosis strategy also includes: If the pressure value of the medium-pressure pipeline is in a fourth pressure interval, it is determined that the hydrogen storage system is in a fault state and the fault level is a fourth level, wherein the minimum value of the fourth pressure interval is the second preset value; If the pressure value of the medium-pressure pipeline is in the fifth pressure interval, it is determined that the hydrogen storage system is in a fault state and the fault level is the fifth level, wherein the minimum value of the fifth pressure interval is greater than the maximum value of the fourth pressure interval, and the fifth level of fault level is higher than the fourth level of fault level; If the pressure value of the medium-pressure pipeline is in the sixth pressure interval, it is determined that the hydrogen storage system is in a fault state and the fault level is the sixth level, wherein the minimum value of the sixth pressure interval is greater than the maximum value of the fifth pressure interval, and the sixth level fault level is higher than the fourth level fault level.

8. A fault diagnosis device for a hydrogen storage system in a vehicle, characterized in that: The vehicle includes a hydrogen storage system, which includes a hydrogen bottle, a pressure reducing device and a medium-pressure pipeline. The hydrogen in the hydrogen bottle enters the medium-pressure pipeline after being decompressed by the pressure reducing device. The device includes: A status acquisition module, used to acquire the pressure value in the medium-pressure pipeline and the current use status of the hydrogen storage system; A strategy determination module, used to determine the fault diagnosis strategy corresponding to the current use state according to the current use state, wherein the hydrogen storage system corresponds to different fault diagnosis strategies under different use states; The result output module is used to diagnose the pressure in the medium-pressure pipeline according to the pressure value and the fault diagnosis strategy corresponding to the current use status, so as to obtain the fault diagnosis result of the hydrogen storage system.

9. A terminal device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the fault diagnosis method of the hydrogen storage system in the vehicle as described in any one of claims 1 to 7 is implemented.

10. A vehicle comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the fault diagnosis method of the hydrogen storage system in the vehicle as described in any one of claims 1 to 7 is implemented.

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