Fault diagnosis method of fuel cell system, electronic device and storage medium

Abstract

The invention provides a fault diagnosis method of a fuel cell system, electronic equipment and a storage medium. In one embodiment of the invention, the fault diagnosis method for the fuel cell system comprises the following steps: acquiring a cathode gas flow actual value and a cathode gas pressure actual value in an operation process of the fuel cell system; the fault reason of the cathode gas supply pipeline is determined according to the actual cathode gas flow value and the actual cathode gas pressure value; and fault prompts corresponding to the fault causes are provided. According to the invention, the fault reason of the cathode gas supply pipeline can be quickly and accurately locked and timely responded during normal operation of the fuel cell system, so that the damage of parts caused by the fault of the cathode gas supply pipeline is effectively avoided.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of fuel cell, in particular to a fault diagnosis method of fuel cell system, an electronic device and a storage medium. BACKGROUND

[0002] Fuel cell system is a clean and efficient energy technology, which can be applied in scenarios such as power stations, homes, vehicles, etc.

[0003] The fuel cell system for vehicles needs to consider many special working conditions due to the complex operating environment of the vehicle. For example, water generated by chemical reaction is easy to freeze in the tail exhaust pipeline in low temperature environment, and in extreme cases, tail exhaust blockage may occur. Or in the case of damage to valves or other parts in the case of jolting, it may also cause the cathode gas supply system pipeline to be blocked. In other application scenarios, the cathode gas supply system pipeline is often blocked, and the cathode gas supply system pipeline blockage will affect the flow of cathode gas and thus affect the performance of the fuel cell system. In severe cases, it may cause the stack to reverse polarity and damage the stack due to excessive pressure or insufficient oxygen. Therefore, the cathode gas supply system pipeline blockage needs to be detected and diagnosed as soon as possible, and if the cathode gas supply system pipeline blockage cannot be effectively disposed for a long time, the air compressor may be damaged due to surging.

[0004] Currently, the leakage and blockage of the pipeline in the cathode gas supply system in the fuel cell system (FCS) are mainly achieved by indirect methods such as detecting the performance deviation of the fuel cell system (for example, the single cell voltage of the stack is too low, etc.). The performance data of the fuel cell system need to be analyzed comprehensively, and the fault of the cathode gas supply system pipeline cannot be immediately locked, which is not conducive to troubleshooting and timely solving of the cathode gas supply system pipeline fault, and affects the normal use of the fuel cell system. Therefore, how to quickly lock the fault position of the cathode gas supply system pipeline is a technical problem to be solved. SUMMARY

[0005] Therefore, the present disclosure provides a fault diagnosis method of fuel cell system, an electronic device and a storage medium, which can quickly lock the fault position of the cathode gas supply system pipeline.

[0006] According to a first aspect of the present disclosure, a fault diagnosis method of fuel cell system is provided, the method comprising: obtaining an actual value of cathode gas flow and an actual value of cathode gas pressure during operation of the fuel cell system; determining a fault cause of the cathode gas supply pipeline according to the actual value of cathode gas flow and the actual value of cathode gas pressure; and providing a fault prompt corresponding to the fault cause.

[0007] In some possible implementation of the first aspect of the present disclosure, the determining the fault cause of the cathode gas supply pipeline according to the actual value of the cathode gas flow and the actual value of the cathode gas pressure comprises:

[0008] comparing the actual value of the cathode gas flow with a first predetermined threshold and a second predetermined threshold respectively, the first predetermined threshold indicating a lower limit of a target value of the cathode gas flow during operation of the fuel cell system, and the second predetermined threshold indicating an upper limit of the target value of the cathode gas flow during operation of the fuel cell system;

[0009] comparing the actual value of the cathode gas pressure with a third predetermined threshold and a fourth predetermined threshold respectively, the third predetermined threshold indicating a lower limit of a target value of the cathode gas pressure during operation of the fuel cell system, and the fourth predetermined threshold indicating an upper limit of the target value of the cathode gas pressure during operation of the fuel cell system;

[0010] if the actual value of the cathode gas flow is less than the first predetermined threshold and the actual value of the cathode gas pressure is greater than the fourth predetermined threshold, determining a fault of a pressure regulating valve and / or a fault of a rear stop valve of the cathode gas supply pipeline;

[0011] if the actual value of the cathode gas flow is greater than the second predetermined threshold and the actual value of the cathode gas pressure is less than the third predetermined threshold, determining a whole pipeline fault of the cathode gas supply pipeline.

[0012] In some possible implementation of the first aspect of the present disclosure, if the actual value of the cathode gas flow is less than the first predetermined threshold and the actual value of the cathode gas pressure is greater than the fourth predetermined threshold, determining a fault of a pressure regulating valve and / or a fault of a rear stop valve of the cathode gas supply pipeline, the fault of the pressure regulating valve being a blockage of the pressure regulating valve, and the fault of the rear stop valve being a blockage of the rear stop valve.

[0013] In some possible implementation of the first aspect of the present disclosure, if the actual value of the cathode gas flow is greater than the second predetermined threshold and the actual value of the cathode gas pressure is less than the third predetermined threshold, determining a whole pipeline fault of the cathode gas supply pipeline, the whole pipeline fault comprising one or more of the following: a gas leakage of the pressure regulating valve; a gas leakage of the cathode gas supply pipeline.

[0014] In some possible implementation of the first aspect of the present disclosure, the method further comprises:

[0015] obtaining an environmental condition and a target load current, the environmental condition comprising an environmental temperature and an atmospheric pressure;

[0016] querying a preconfigured control table to obtain a target value of the cathode gas flow and a target value of the cathode gas pressure corresponding to the environmental condition and the target load current;

[0017] query a preconfigured first mapping table to obtain the first predetermined threshold value and the second predetermined threshold value corresponding to the cathode gas flow target value;

[0018] query a preconfigured second mapping table to obtain the third predetermined threshold value and the fourth predetermined threshold value corresponding to the cathode gas pressure target value.

[0019] In some possible implementation of the first aspect of the present disclosure, the first predetermined threshold value and the second predetermined threshold value are obtained by adding or subtracting a first predetermined deviation from the cathode gas flow target value corresponding to the environmental condition and the target pull current; and / or, the third predetermined threshold value and the fourth predetermined threshold value are obtained by adding or subtracting a second predetermined deviation from the cathode gas pressure target value corresponding to the environmental condition and the target pull current.

[0020] In some possible implementation of the first aspect of the present disclosure, the determining the failure cause of the cathode gas supply pipeline according to the cathode gas flow actual value and the cathode gas pressure actual value further includes: determining that the cathode gas supply pipeline is normal if one of the following conditions is met:

[0021] the cathode gas flow actual value is greater than or equal to the first predetermined threshold value and less than or equal to the second predetermined threshold value;

[0022] the cathode gas pressure actual value is greater than or equal to the third predetermined threshold value and less than or equal to the fourth predetermined threshold value;

[0023] the cathode gas flow actual value is less than or equal to the first predetermined threshold value and the cathode gas pressure actual value is less than or equal to the third predetermined threshold value;

[0024] the cathode gas flow actual value is greater than or equal to the second predetermined threshold value and the cathode gas pressure actual value is greater than or equal to the fourth predetermined threshold value.

[0025] In some possible implementation of the first aspect of the present disclosure, the failure prompt includes one of the following: a first failure prompt for reminding a user to check a pressure regulating valve and / or a backstop valve of the cathode gas supply pipeline; and a second failure prompt for reminding the user to check the cathode gas supply pipeline as a whole.

[0026] According to a second aspect of the present disclosure, an electronic device is provided, including one or more processors and a memory storing a program, the program including instructions which, when executed by the processor, cause the processor to perform the method described above.

[0027] According to a first aspect of the present disclosure, there is provided a computer readable storage medium storing a program, the program comprising instructions which, when executed by one or more processors of a computing device, cause the computing device to perform the method described above.

[0028] As can be seen from the technical solutions described above, the embodiments of the present disclosure can, during normal operation of the fuel cell system, utilize the closed nature of the cathode gas supply pipeline to efficiently and quickly lock the fault cause of the cathode gas supply pipeline and provide a corresponding fault prompt in a timely manner, thereby effectively avoiding serious damage to the fuel cell system caused by a fault of the cathode gas supply pipeline and facilitating troubleshooting and disposal. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0030] Figure 1 A structural schematic diagram of the cathode gas supply pipeline provided by the embodiments of the present disclosure is shown in the figure.

[0031] Figure 2 A flowchart of the fault diagnosis method of the fuel cell system provided by the embodiments of the present disclosure is shown in the figure.

[0032] Figure 3 A flowchart of the fault diagnosis method of the fuel cell system provided by the embodiments of the present disclosure is shown in the figure.

[0033] Figure 4 A structural schematic diagram of the fault diagnosis device applied to the fuel cell system provided by the embodiments of the present disclosure is shown in the figure.

[0034] Figure 5 A schematic structural block diagram of an electronic device provided by the embodiments of the present disclosure is shown in the figure.

[0035] BRIEF DESCRIPTION OF DRAWINGS

[0036] 101, cathode gas filter

[0037] 102, cathode gas flowmeter

[0038] 103, air compressor

[0039] 104, intercooler

[0040] 105, bypass valve

[0041] 106, front stop valve

[0042] 107. pressure sensor;

[0043] 108. rear cut-off valve;

[0044] 109. pressure regulating valve;

[0045] 110. muffler;

[0046] 111. tail pipe. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present disclosure.

[0048] The terms used in the embodiments of the present disclosure are merely for the purpose of describing specific embodiments, and are not intended to limit the present disclosure. The singular forms "a", "an" and "the" used in the embodiments of the present disclosure and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0049] Depending on the context, the word "if" as used herein can be interpreted to mean "when" or "upon" or "in response to determining" or "in response to detecting". Similarly, the phrase "if determined" or "if detecting (a stated condition or event)" can be interpreted to mean "when determined" or "in response to determining" or "when detecting (a stated condition or event)" or "in response to detecting (a stated condition or event)", depending on the context.

[0050] The key terms related to the present disclosure will be described first.

[0051] Cathode gas supply subsystem: It is responsible for providing the required gas, such as air or oxygen, to the cathode of the stack. The main purpose of the cathode gas supply subsystem is to ensure that the cathode of the stack can stably and uniformly receive the required gas to maintain the normal operation of the fuel cell system.

[0052] Cathode gas supply pipeline: It refers to the gas flow pipeline of the cathode gas supply subsystem, the various components and valves involved in the pipeline, such as air flow meter, air compressor, intercooler, humidifier, etc. The gas flow pipeline is a key part of the cathode gas supply subsystem, which refers to the pipeline and its related connections used to transport gas to the cathode of the stack. The design of the cathode gas supply pipeline needs to consider the flow characteristics of the gas, pressure loss, gas mixing efficiency, and the sealing of the fuel cell system, etc.

[0053] For ease of understanding, the fuel cell system involved in the embodiments of this disclosure will be described in detail below.

[0054] This disclosure provides a fuel cell system including a fuel cell control unit (FCU), which can be used to perform the fault diagnosis method for the fuel cell system described below.

[0055] For example, the fuel cell system of this disclosure may include: a cathode gas supply subsystem, an anode gas supply subsystem, an electronic control subsystem, a fuel cell stack, and a hydrothermal management subsystem. The electronic control subsystem is used to control the operation of other parts, and includes the aforementioned fuel cell controller. The cathode gas supply subsystem is used to supply cathode gas to the fuel cell stack, the anode gas supply subsystem is used to supply anode gas to the fuel cell stack, and the hydrothermal management subsystem is responsible for the hydrothermal management of the fuel cell stack.

[0056] The following describes in detail the structure of the cathode gas supply subsystem in the fuel cell system of this disclosure, taking an on-board fuel cell system as an example.

[0057] Figure 1 A schematic diagram of the cathode gas supply subsystem of an onboard fuel cell system is shown. (See also...) Figure 1 The cathode gas supply subsystem of the on-board fuel cell system is used to control the flow rate and pressure of the cathode gas entering the stack. The cathode gas supply subsystem may include a cathode gas filter 101, a cathode gas flow meter 102, an air compressor 103, an intercooler 104, a bypass valve 105, a front shut-off valve 106, a pressure sensor 107, a rear shut-off valve 108, a pressure regulating valve 109, a muffler 110, a tailpipe 111, and pipelines connecting the various components.

[0058] The working principle of the cathode gas supply subsystem is as follows: The air compressor 103 is driven by a motor to draw in cathode gas through the cathode gas filter 101 and the cathode gas flow meter 102. After being compressed and pressurized by the air compressor 103, the cathode gas is cooled by the cathode gas intercooler. When the fuel cell system is working normally, the bypass valve 105 is closed, and the front shut-off valve 106, the rear shut-off valve 108 and the pressure regulating valve 109 are open. The cathode gas flows through the stack and reacts in the stack, and then is discharged through the silencer 110 and the tailpipe 111. When the fuel cell system is started to purge the anode, the cathode gas does not need to enter the stack. At this time, the bypass valve 105 is open, and the front shut-off valve 106, the rear shut-off valve 108 and the pressure regulating valve 109 are closed at the same time. The compressed and cooled cathode gas flows through the bypass valve 105 and then is directly discharged through the silencer 110 and the tailpipe 111.

[0059] The air compressor 103 is used to suck in the cathode gas and compress the pressurized gas, and the rotation speed of the air compressor 103 is adjusted by the motor to control the flow of the cathode gas. The flow of the cathode gas can be measured in real time by the cathode gas flow meter 102. The bypass valve 105 is used to bypass the cathode gas without passing through the stack. The pressure sensor 107 is used to measure the pressure of the cathode gas entering the stack in real time. The front stop valve 106 and the rear stop valve 108 are used to close the pipeline before and after the stack and control whether the cathode gas enters the stack. When the front stop valve 106 and the rear stop valve 108 are opened, the cathode gas can enter the stack through the pipeline. When the front stop valve 106 and the rear stop valve 108 are closed, the cathode gas cannot enter the stack. The pressure regulating valve 109 is used to control the pressure of the cathode gas entering the stack. The pressure regulating valve 109 can adjust the pressure of the cathode gas entering the stack (i.e., the pressure of the cathode gas entering the stack) by the action of the opening degree.

[0060] The fuel cell system provided by the embodiments of the present disclosure can be applied to various application scenarios. For example, power stations, household scenarios, and mobile application scenarios such as vehicles. The embodiments of the present disclosure do not limit the specific application scenarios of the fuel cell system.

[0061] Figure 2 A flowchart of a fault diagnosis method of the fuel cell system provided by the embodiments of the present disclosure is shown. The fault diagnosis method of the fuel cell system provided by the embodiments of the present disclosure can be executed by a fuel controller in the fuel cell system. Referring to Figure 2 The method of the embodiments of the present disclosure can include:

[0062] In step 201, during the operation of the fuel cell system, an actual value of the cathode gas flow and an actual value of the cathode gas pressure are obtained.

[0063] In step 202, the fault cause of the cathode gas supply pipeline is determined according to the actual value of the cathode gas flow and the actual value of the cathode gas pressure.

[0064] In step 203, a fault prompt corresponding to the fault cause is provided.

[0065] The embodiments of the present disclosure can use the sealing characteristics of the cathode gas supply pipeline during the normal operation of the fuel cell system, efficiently and quickly lock the fault cause of the cathode gas supply pipeline through the cathode gas flow and the cathode gas pressure, and timely provide the corresponding fault prompt. That is, the blockage and air leakage of the cathode gas supply pipeline in the fuel cell system can be efficiently and quickly locked and responded to in time during the normal operation of the fuel cell system, thereby effectively avoiding the serious damage of the fuel cell system caused by the fault of the cathode gas supply pipeline.

[0066] In specific applications, the type of the fuel cell system is different, and the type of the cathode gas is different. For example, if the fuel cell system is a hydrogen fuel cell system, the cathode gas can be air.

[0067] In step 201, the cathode gas flow rate is detected in real time by the cathode gas flow meter 102 and provided to the fuel cell controller, so that the fuel cell controller can obtain the actual value of the cathode gas flow rate in real time.

[0068] In some embodiments, the environmental conditions can be detected in real time by a temperature sensor, a barometer, etc. which is externally connected to or internally built in the air flow meter 102, and the characteristics of the environmental conditions (e.g. the environmental temperature and the atmospheric pressure, etc.) are provided to the fuel cell controller, so that the fuel cell controller can query the respective threshold values corresponding to the current environmental conditions in real time to determine the failure cause.

[0069] In step 201, the actual value of the cathode gas pressure can be detected in real time by the aforementioned pressure sensor and provided to the fuel cell controller, so that the fuel cell controller can perform the failure diagnosis of the cathode gas supply pipeline.

[0070] In step 202, the failure cause of the cathode gas supply pipeline is determined according to the actual value of the cathode gas flow rate and the actual value of the cathode gas pressure during the normal operation of the fuel cell system, which can include:

[0071] The actual value of the cathode gas flow rate is compared with the first predetermined threshold value and the second predetermined threshold value respectively, the first predetermined threshold value indicating the lower limit of the target value of the cathode gas flow rate during the operation of the fuel cell system, and the second predetermined threshold value indicating the upper limit of the target value of the cathode gas flow rate during the operation of the fuel cell system;

[0072] The actual value of the cathode gas pressure is compared with the third predetermined threshold value and the fourth predetermined threshold value respectively, the third predetermined threshold value indicating the lower limit of the target value of the cathode gas pressure during the operation of the fuel cell system, and the fourth predetermined threshold value indicating the upper limit of the target value of the cathode gas pressure during the operation of the fuel cell system;

[0073] If the actual value of the cathode gas flow rate is less than the first predetermined threshold value and the actual value of the cathode gas pressure is greater than the fourth predetermined threshold value, it is determined that the pressure regulating valve and / or the rear stop valve of the cathode gas supply pipeline fails.

[0074] If the actual value of the cathode gas flow rate is greater than the second predetermined threshold value and the actual value of the cathode gas pressure is less than the third predetermined threshold value, it is determined that the overall pipeline of the cathode gas supply pipeline fails.

[0075] In this way, the failure cause of the cathode gas supply pipeline is efficiently locked by the actual conditions of the cathode gas flow rate and the cathode gas pressure and the upper and lower limits of their target values.

[0076] Further, if the actual value of the cathode gas flow is less than the first predetermined threshold value and the actual value of the cathode gas pressure is greater than the fourth predetermined threshold value, it is determined that the pressure regulating valve of the cathode gas supply pipeline is faulty and / or the rear stop valve is faulty. At this time, the pressure regulating valve fault can be a pressure regulating valve blockage, and the rear stop valve fault can be a rear stop valve blockage.

[0077] Further, if the actual value of the cathode gas flow is greater than the second predetermined threshold value and the actual value of the cathode gas pressure is less than the third predetermined threshold value, it is determined that the cathode gas supply pipeline is faulty as a whole. The fault of the cathode gas supply pipeline as a whole at this time can include but is not limited to: pressure regulating valve leakage, cathode gas pipeline leakage, etc. In one example, the cathode gas pipeline leakage can include but is not limited to: pipeline leakage of the cathode gas transmission pipeline, and leakage of air filter, flow meter, air compressor, cooler, etc.

[0078] Further, step 202 can further include: if one of the following conditions is met, it is determined that the cathode gas supply pipeline is normal: 1) the actual value of the cathode gas flow is greater than or equal to the first predetermined threshold value and less than or equal to the second predetermined threshold value; 2) the actual value of the cathode gas pressure is greater than or equal to the third predetermined threshold value and less than or equal to the fourth predetermined threshold value; 3) the actual value of the cathode gas flow is less than or equal to the first predetermined threshold value and the actual value of the cathode gas pressure is less than or equal to the third predetermined threshold value; 4) the actual value of the cathode gas flow is greater than or equal to the second predetermined threshold value and the actual value of the cathode gas pressure is greater than or equal to the fourth predetermined threshold value. These conditions are all normal conditions of the fuel cell system in operation. When the cathode gas supply amount decreases, the flow is low and the gas pressure is low; when the cathode gas supply amount increases, the flow is high and the gas pressure also rises. Therefore, the actual value of the cathode gas pressure and the actual value of the cathode gas flow can be used to efficiently and quickly lock the normal condition of the cathode gas supply pipeline. In the case of a normal cathode gas supply pipeline, a prompt of the normal cathode gas supply pipeline can be further provided, or no processing can be performed. The embodiments of the present disclosure do not limit this.

[0079] In step 202, if the actual value of the cathode gas flow is greater than or equal to the first predetermined threshold value and less than or equal to the second predetermined threshold value, but the actual value of the cathode gas pressure is lower than the third predetermined threshold value or higher than the fourth predetermined threshold value, it is still determined that the cathode gas supply pipeline is normal, but other parts of the fuel cell system can have abnormalities, which can be further diagnosed by using other fault diagnosis methods applicable to the fuel cell system. The embodiments of the present disclosure do not limit this.

[0080] In step 202, if the actual value of the cathode gas pressure is greater than or equal to the third predetermined threshold value and less than or equal to the fourth predetermined threshold value, but the actual value of the cathode gas flow is lower than the first predetermined threshold value or higher than the second predetermined threshold value, it is still determined that the cathode gas supply pipeline is normal, but other parts of the fuel cell system may be abnormal, which can be further diagnosed by using other fault diagnosis methods applicable to the fuel cell system. In this regard, the embodiments of the present disclosure are not limited.

[0081] The first predetermined threshold value, the second predetermined threshold value and the cathode gas flow target value are related, the third predetermined threshold value, the fourth predetermined threshold value and the cathode gas pressure target value are related, and the first predetermined threshold value, the second predetermined threshold value, the third predetermined threshold value and the fourth predetermined threshold value are also related to the environmental conditions.

[0082] In step 202, the environmental conditions and the target pull current can also be obtained, a pre-configured control table can be queried to obtain the cathode gas flow target value and the cathode gas pressure target value corresponding to the environmental conditions and the target pull current, a pre-configured first mapping table can be queried to obtain the first predetermined threshold value and the second predetermined threshold value corresponding to the cathode gas flow target value, and a pre-configured second mapping table can be queried to obtain the third predetermined threshold value and the fourth predetermined threshold value corresponding to the cathode gas pressure target value. In this way, the first predetermined threshold value, the second predetermined threshold value, the third predetermined threshold value and the fourth predetermined threshold value can be selected by adapting to the current environment and the current power demand, so as to accurately and efficiently lock the fault cause of the cathode gas supply pipeline under different environments and different demands.

[0083] The control table can include the cathode gas flow target value and the cathode gas pressure target value corresponding to various environmental conditions and various target pull currents. The control table can be pre-calibrated and saved in the memory of the fuel cell controller, other memories built-in / connected to the fuel cell controller, so that the fuel cell controller can quickly and efficiently call the control table to perform processes such as cathode gas supply pipeline fault diagnosis when needed.

[0084] The first mapping table can include first and second predetermined threshold values corresponding to each cathode gas flow target value. The second mapping table can include third and fourth predetermined threshold values corresponding to each cathode gas pressure target value. The first and second predetermined threshold values can be obtained by adding or subtracting a first predetermined deviation to the cathode gas flow target value. The third and fourth predetermined threshold values can be obtained by adding or subtracting a second predetermined deviation to the cathode gas pressure target value. For example, in view of the fact that the actual cathode gas flow is generally within 5% of the cathode gas flow target value and the actual cathode gas pressure is generally within 5% of the cathode gas pressure target value when the fuel cell system is normally and stably operated, the first predetermined deviation can be 5% of the cathode gas flow target value, the second predetermined deviation can be 5% of the cathode gas pressure target value, the first predetermined threshold value can be obtained by subtracting 5% of itself from the cathode gas flow target value, the second predetermined threshold value can be obtained by adding 5% of itself to the cathode gas flow target value, the third predetermined threshold value can be obtained by subtracting 5% of itself from the cathode gas pressure target value, and the fourth predetermined threshold value can be obtained by adding 5% of itself to the cathode gas pressure target value. By setting the threshold value corresponding to the upper limit and the threshold value corresponding to the lower limit, false alarms can be avoided.

[0085] The first and second mapping tables can be calibrated in advance and stored in the memory of the fuel cell controller, other storage devices built-in or connected to the fuel cell controller, so that the fuel cell controller can quickly call the first and second mapping tables to efficiently complete the fault diagnosis of the cathode gas supply pipeline.

[0086] From the above, during normal operation of the fuel cell system, the abnormality of the cathode gas supply pipeline can be locked according to the changes in the cathode gas flow and the cathode gas pressure.

[0087] The fault cause in step 202 can include one or more of, but not limited to, the following: fault location, fault type. The fault type of the cathode gas supply system can include blockage, gas leakage, element shedding, element blockage, etc. The fault location can be a specific component on the cathode gas supply pipeline, such as a bypass valve, a pressure regulating valve, a silencer, etc., or the cathode gas supply pipeline. In specific applications, the fault cause can be represented by text information, pre-agreed fault codes, component numbers, etc. The specific content of the fault cause and its representation method are not limited by the embodiments of the present disclosure.

[0088] The fault prompt in step 203 corresponds to the fault cause in step 202. Exemplarily, the fault prompt can include but is not limited to one or more of the following: 1) a first fault prompt for reminding a user to check a pressure regulating valve and / or a rear stop valve of the cathode gas supply pipeline; and 2) a second fault prompt for reminding a user to check the whole pipeline of the cathode gas supply pipeline. Thus, the fault position of the cathode gas supply pipeline can be intuitively and clearly indicated by the fault prompt, facilitating troubleshooting.

[0089] In specific applications, the fault prompt can be implemented as but is not limited to a dialog box, a picture prompt, a voice prompt, an alarm prompt, a light-on prompt, etc. The specific implementation form of the fault prompt is not limited in the embodiments of the present disclosure.

[0090] In specific applications, the providing mode of the fault prompt in step 203 can include but is not limited to issuing, showing, outputting, etc. The providing mode of the fault prompt can be flexibly selected in combination with specific application scenarios. The specific providing mode is not limited in the embodiments of the present disclosure.

[0091] The fault diagnosis method provided by the embodiments of the present disclosure can efficiently lock the faults such as blockage, gas leakage, and element falling off of the pressure regulating valve and other positions of the cathode gas supply pipeline, without changing the hardware and software functions of the existing fuel cell system, during the normal operation of the fuel cell system, through the cathode gas flow and the cathode gas pressure. The method is easy to implement, fast in response, and can effectively avoid the damage of components caused by the faults of the cathode gas supply pipeline. Meanwhile, the method can clearly and accurately indicate the fault position of the cathode gas supply pipeline, facilitating troubleshooting.

[0092] The specific implementation of the embodiments of the present disclosure will be described in detail below taking air as an example of the cathode gas.

[0093] During normal operation of the fuel cell system, the entire cathode gas supply pipeline of the fuel cell system is a closed pipeline, the cathode gas flowing into the cathode gas supply pipeline is entirely circulated inside the fuel cell system, the gas pressure of the cathode gas supply pipeline is established by the gas flow, and the change of the flow resistance of the cathode gas supply pipeline has opposite effects on the cathode gas flow and the cathode gas pressure. Under the condition that the cathode gas supply pipeline is free of faults, the flow resistance of the cathode gas supply pipeline is constant, and the cathode gas flow and the cathode gas pressure will synchronously increase or decrease. When the cathode gas supply pipeline has faults such as blockage and gas leakage, the flow resistance inside the cathode gas supply pipeline will change, the cathode gas flow will change in the opposite direction, and the cathode gas pressure will change in the positive direction, that is, when the cathode gas supply pipeline has faults such as blockage, the flow resistance inside the cathode gas supply pipeline will increase, the cathode gas flow will decrease, and the cathode gas pressure will increase. When the cathode gas supply pipeline has faults such as gas leakage, the flow resistance of the cathode gas supply pipeline will decrease, the cathode gas flow will increase, and the cathode gas pressure will decrease. Therefore, the fault causes of the cathode gas supply pipeline can be locked by the cathode gas flow and the cathode gas pressure.

[0094] The embodiment illustrates the fault diagnosis process of the fuel cell system during normal operation of the fuel cell system.

[0095] Figure 3 A flowchart for detecting faults of the cathode gas supply pipeline during stable operation of the fuel cell system is shown. Referring to FIG. 4, the flowchart can include the following steps: Figure 3

[0096] Step 301, detecting the actual value of the current air flow and the actual value of the current air pressure;

[0097] Step 302, judging whether the actual value of the current air flow is less than a first predetermined threshold corresponding to the current ambient temperature and atmospheric pressure;

[0098] Step 303, judging whether the actual value of the current air flow is greater than a second predetermined threshold corresponding to the current ambient temperature and atmospheric pressure;

[0099] Step 304, judging whether the actual value of the current air pressure is less than a third predetermined threshold corresponding to the current ambient temperature and atmospheric pressure;

[0100] Step 305, judging whether the actual value of the current air pressure is greater than a fourth predetermined threshold corresponding to the current ambient temperature and atmospheric pressure;

[0101] Step 306, if the actual value of the air flow is less than the first predetermined threshold and the actual value of the air pressure is greater than the fourth predetermined threshold, it is determined that the cathode gas supply pipeline has a fault, the fault position is in the pressure regulating valve and / or the rear stop valve, and the fault type is that the valve plate of the pressure regulating valve is blocked and / or the rear stop valve is blocked;

[0102] ​Step 307, control all actuators to stop urgently, and issue a first fault prompt to remind the user that the pressure regulating valve and / or the rear stop valve are damaged.

[0103] Step 308, if the air flow actual value is greater than a second predetermined threshold value and the air pressure actual value is less than a third predetermined threshold value, it is determined that the cathode gas supply pipeline is faulty, the fault position is the pressure regulating valve or the whole pipeline, and the fault type is that the valve plate of the pressure regulating valve is off or the pipeline leaks.

[0104] The pipeline leakage includes leakage of the gas flow pipeline and leakage of each component on the gas flow pipeline.

[0105] Step 309, control all actuators to stop urgently, and issue a second fault prompt to remind the user to check the cathode gas pipeline or the pressure regulating valve.

[0106] Step 310, if the air flow actual value is between the first predetermined threshold value and the second predetermined threshold value and the air pressure actual value is between the third predetermined threshold value and the fourth predetermined threshold value, the air flow actual value is less than the first predetermined threshold value and the air pressure actual value is less than the third predetermined threshold value, and the air flow actual value is greater than the second predetermined threshold value and the air pressure actual value is greater than the fourth predetermined threshold value, the cathode gas supply pipeline is normal.

[0107] Through the embodiment, the cathode gas flow and the cathode gas pressure can be used to efficiently and accurately lock the faults such as blockage of the pressure regulating valve, blockage of the rear stop valve, off of the valve of the pressure regulating valve, and leakage of the pipeline of the cathode gas supply pipeline, and a quick response is provided, so that component damage caused by the faults of the cathode gas supply pipeline during normal operation of the fuel cell system can be effectively avoided.

[0108] Figure 4 A structure diagram of a fault diagnosis device of a fuel cell system provided by an embodiment of the present disclosure is shown. Referring to Figure 4 , the control device 400 of the fuel cell system can include:

[0109] The acquisition unit 401 is configured to acquire an actual value of cathode gas flow and an actual value of cathode gas pressure during operation of the fuel cell system.

[0110] The fault determination unit 402 is configured to determine a fault cause of the cathode gas supply pipeline according to the actual value of cathode gas flow and the actual value of cathode gas pressure.

[0111] The prompt unit 403 is configured to provide a fault prompt corresponding to the fault cause.

[0112] In some embodiments, the fault determination unit 402 can be specifically configured to: compare the actual value of the cathode gas flow with the first predetermined threshold and the second predetermined threshold respectively, the first predetermined threshold indicating a lower limit of the target value of the cathode gas flow during the operation of the fuel cell system, and the second predetermined threshold indicating an upper limit of the target value of the cathode gas flow during the operation of the fuel cell system; compare the actual value of the cathode gas pressure with the third predetermined threshold and the fourth predetermined threshold respectively, the third predetermined threshold indicating a lower limit of the target value of the cathode gas pressure during the operation of the fuel cell system, and the fourth predetermined threshold indicating an upper limit of the target value of the cathode gas pressure during the operation of the fuel cell system; determine the fault of the pressure regulating valve and / or the fault of the rear stop valve of the cathode gas supply pipeline if the actual value of the cathode gas flow is less than the first predetermined threshold and the actual value of the cathode gas pressure is greater than the fourth predetermined threshold; and determine the overall pipeline fault of the cathode gas supply pipeline if the actual value of the cathode gas flow is greater than the second predetermined threshold and the actual value of the cathode gas pressure is less than the third predetermined threshold.

[0113] In some embodiments, the device 400 can further include a threshold determination unit 404 configured to obtain the first predetermined threshold and the second predetermined threshold by adding and subtracting a first predetermined deviation from the target value of the cathode gas flow corresponding to the environmental condition and the target load current; and / or obtain the third predetermined threshold and the fourth predetermined threshold by adding and subtracting a second predetermined deviation from the target value of the cathode gas pressure corresponding to the environmental condition and the target load current.

[0114] In specific applications, the fault diagnosis device 400 of the fuel cell system can be realized by software, hardware or a combination of both. For example, the fault diagnosis device 400 of the fuel cell system can be realized as software running in the fuel cell controller of the aforementioned fuel cell system.

[0115] For other technical details of the fault diagnosis device 400 of the fuel cell system, please refer to the aforementioned part of the fault diagnosis method, which will not be repeated here.

[0116] In addition, the embodiments of the present disclosure also provide a computer readable storage medium having a computer program stored thereon, the program including instructions which, when executed by one or more processors of a computing device, perform the steps of the aforementioned fault diagnosis method of the fuel cell system.

[0117] Figure 5 A structural schematic diagram of an electronic device provided by the embodiments of the present disclosure is shown. The electronic device can be the main controller of the aforementioned fuel cell system. Referring to Figure 5 The electronic device 500 can include one or more processors 501, and further include a memory 502 storing one or more programs, which are executed by the aforementioned one or more processors 501 to implement the program units corresponding to the method processes and / or units in the devices shown in the aforementioned embodiments of the present disclosure.

[0118] The various components are interconnected via different buses and can be mounted on a common motherboard or otherwise as required. Processor 501 can process instructions executed within the electronic device, including instructions stored in or on memory to display graphical information of a user interface on an external input / output device (such as a display device coupled to an interface). In other embodiments, multiple processors and / or multiple buses can be used with multiple memories and multiple memory sets, if desired.

[0119] Processor 501 may include one or more single-core or multi-core processors. Processor 501 may include any combination of general-purpose processors or special-purpose processors (such as graphics processors, application processors, baseband processors, etc.).

[0120] Memory 502 is the computer-readable storage medium provided in this disclosure, which can be used to store non-transitory software programs, non-transitory computer-executable programs, and units, such as those in the embodiments of this disclosure. Figure 2 The program instructions / units corresponding to the fault diagnosis method of the fuel cell system shown are as follows. The processor 501 executes non-transient software programs, instructions, and units stored in the memory 502, thereby performing operations such as those described in the above method embodiments. Figure 2 The program, instructions, and units corresponding to the fault diagnosis method of the fuel cell system shown.

[0121] The electronic device 500 may further include an input device 503 and an output device 505. The processor 501, memory 502, input device 503, and output device 505 can be connected via a bus or other means. Figure 5 Taking the example of a connection between China and Israel via a bus.

[0122] Input device 503 can receive input digital or character information, and generate signal inputs related to user settings and function control, such as touch screens, keypads, mice, trackpads, touchpads, joysticks, one or more mouse buttons, trackballs, joysticks, etc. Output device 505 may include display devices, auxiliary lighting devices (e.g., LEDs), and haptic feedback devices (e.g., vibration motors). The display device may include, but is not limited to, liquid crystal displays (LCDs), light-emitting diode (LED) displays, and plasma displays. In some embodiments, the display device may be a touch screen.

[0123] The aforementioned programs (also known as software, software applications, or code) include the machine instructions of a programmable processor and can be implemented using object-oriented programming languages, assembly language, or machine language.

[0124] With the development of time and technology, the meaning of "medium" has become increasingly broad. The dissemination of computer programs is no longer limited to tangible media; they can also be downloaded directly from the network. Any combination of one or more computer-readable storage media can be used. Computer-readable storage media can be, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media (a non-exhaustive list) include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, device, or apparatus.

[0125] In a specific implementation, the electronic device 500 can be implemented as, but is not limited to, a fuel cell controller in a fuel cell system.

[0126] This disclosure also provides a vehicle that includes the fuel cell system provided in this disclosure.

[0127] The technical solutions provided in this disclosure have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this disclosure. The descriptions of the embodiments above are only for the purpose of helping to understand the methods and core ideas of this disclosure. Furthermore, those skilled in the art will recognize that, based on the ideas of this disclosure, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this disclosure.

[0128] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Any modifications or equivalent substitutions made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A failure diagnosis method of a fuel cell system, characterized by, The method comprises: During operation of the fuel cell system, an actual value of cathode gas flow rate and an actual value of cathode gas pressure are obtained; A fault cause of a cathode gas supply pipeline is determined according to the actual value of cathode gas flow rate and the actual value of cathode gas pressure; A fault prompt corresponding to the fault cause is provided.

2. The method of claim 1, wherein, The determination of the fault cause of the cathode gas supply pipeline according to the actual value of cathode gas flow rate and the actual value of cathode gas pressure comprises: The actual value of cathode gas flow rate is compared with a first predetermined threshold value and a second predetermined threshold value respectively, the first predetermined threshold value indicating a lower limit of a target value of cathode gas flow rate during operation of the fuel cell system, and the second predetermined threshold value indicating an upper limit of the target value of cathode gas flow rate during operation of the fuel cell system; The actual value of cathode gas pressure is compared with a third predetermined threshold value and a fourth predetermined threshold value respectively, the third predetermined threshold value indicating a lower limit of a target value of cathode gas pressure during operation of the fuel cell system, and the fourth predetermined threshold value indicating an upper limit of the target value of cathode gas pressure during operation of the fuel cell system; If the actual value of cathode gas flow rate is less than the first predetermined threshold value and the actual value of cathode gas pressure is greater than the fourth predetermined threshold value, it is determined that a pressure regulating valve of the cathode gas supply pipeline is faulty and / or a rear stop valve of the cathode gas supply pipeline is faulty; If the actual value of cathode gas flow rate is greater than the second predetermined threshold value and the actual value of cathode gas pressure is less than the third predetermined threshold value, it is determined that an overall pipeline of the cathode gas supply pipeline is faulty.

3. The method of claim 2, wherein, If the actual value of cathode gas flow rate is less than the first predetermined threshold value and the actual value of cathode gas pressure is greater than the fourth predetermined threshold value, it is determined that the pressure regulating valve of the cathode gas supply pipeline is faulty and / or the rear stop valve of the cathode gas supply pipeline is faulty, the fault of the pressure regulating valve being a blockage of the pressure regulating valve, and the fault of the rear stop valve being a blockage of the rear stop valve.

4. The method of claim 2, wherein, If the actual value of cathode gas flow rate is greater than the second predetermined threshold value and the actual value of cathode gas pressure is less than the third predetermined threshold value, it is determined that the overall pipeline of the cathode gas supply pipeline is faulty, the overall pipeline fault including one or more of the following: leakage of the pressure regulating valve; leakage of the cathode gas supply pipeline.

5. The method of claim 2, wherein, Further comprising: An environmental condition and a target load current are obtained, the environmental condition including an environmental temperature and an atmospheric pressure; A preconfigured control table is queried to obtain a target value of cathode gas flow rate and a target value of cathode gas pressure corresponding to the environmental condition and the target load current; A preconfigured first mapping table is queried to obtain the first predetermined threshold value and the second predetermined threshold value corresponding to the target value of cathode gas flow rate; A preconfigured second mapping table is queried to obtain the third predetermined threshold value and the fourth predetermined threshold value corresponding to the target value of cathode gas pressure.

6. The method according to claim 2 or 5, characterized in that, The first predetermined threshold value and the second predetermined threshold value are obtained by adding and subtracting a first predetermined deviation from the target value of cathode gas flow rate corresponding to the environmental condition and the target load current; and / or, the third predetermined threshold value and the fourth predetermined threshold value are obtained by adding and subtracting a second predetermined deviation from the target value of cathode gas pressure corresponding to the environmental condition and the target load current.

7. The method of claim 2, wherein, The determining the fault cause of the cathode gas supply pipeline according to the cathode gas flow actual value and the cathode gas pressure actual value further comprises: determining that the cathode gas supply pipeline is normal if one of the following conditions is met: the cathode gas flow actual value is greater than or equal to a first predetermined threshold and less than or equal to a second predetermined threshold; the cathode gas pressure actual value is greater than or equal to a third predetermined threshold and less than or equal to a fourth predetermined threshold; the cathode gas flow actual value is less than or equal to the first predetermined threshold and the cathode gas pressure actual value is less than or equal to the third predetermined threshold; the cathode gas flow actual value is greater than or equal to the second predetermined threshold and the cathode gas pressure actual value is greater than or equal to the fourth predetermined threshold.

8. The method of claim 1, wherein, The fault prompt comprises one of: a first fault prompt for prompting a user to check a pressure regulating valve and / or a backstop valve of the cathode gas supply pipeline; a second fault prompt for prompting a user to check the cathode gas supply pipeline as a whole.

9. An electronic device, comprising: comprise: one or more processors and a memory storing a program, the program comprising instructions which, when executed by the processors, cause the processors to carry out the method of any one of claims 1-8.

10. A computer-readable storage medium storing a program, the program comprising instructions which, when executed by one or more processors of a computing device, cause the computing device to carry out the method of any one of claims 1-8.

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