Fuel cell control method and device for sensor abnormality, vehicle and storage medium

Abstract

The invention provides a fuel cell control method and device for sensor abnormity, a vehicle and a storage medium, the method is applied to the vehicle, and the method comprises the following steps: identifying an abnormal sensor type of which one of an anode and a cathode of a stack of a fuel cell is abnormal; if the type of the abnormal sensor is the type participating in control logic calculation, obtaining the average monomer voltage of the fuel cell and a first inlet pressure value of the other one of the anode and the cathode of the electric pile without the abnormal sensor; and determining a second inlet pressure value of one of the anode and the cathode of the stack according to the average monomer voltage and the first inlet pressure value, and controlling the fuel cell to work according to the first inlet pressure value and the second inlet pressure value. According to the method, the abnormal type of the sensor can be judged, when the abnormal sensor type is the type participating in control logic calculation, the normal side sensor and the inlet pressure value obtained through average single voltage calculation are used for replacing the abnormal sensor to work, and the situation that system safety is affected due to sudden stop of the system is avoided.

Description

Technical Field

[0001] The present application relates to the field of vehicles, and more specifically, to a method, device, vehicle and storage medium for controlling a fuel cell with abnormal sensors in the field of vehicles. Background Art

[0002] During normal power generation operation of the fuel cell system, the anode or cathode stack sensor monitors the system status in real time and ensures the safe operation of the system, which is extremely important. In traditional solutions, when a sensor abnormality occurs, the system strictly handles the fault internally, and for the purpose of self-protection, it will shut down rashly regardless of the power demand and operating status of the vehicle. If the system is shut down after a problem occurs, it can indeed protect the system, but without any external rescue help or replacement of the sensor, the fuel cell system will still not be able to operate, and the output performance and problems will still remain unsolved. Summary of the invention

[0003] The present application provides a fuel cell control method, device, vehicle and storage medium with sensor abnormality. The method can determine the type of sensor abnormality when a sensor abnormality occurs in the fuel cell. When the abnormal sensor type is a type that participates in control logic calculation, the inlet pressure value calculated by using the average single cell voltage of the normal side sensor and the battery is used to replace the abnormal sensor, and remedial measures are given to avoid emergency stop of the system and affect system safety.

[0004] In a first aspect, a fuel cell control method with sensor abnormality is provided, the method comprising: identifying the type of abnormal sensor in which an abnormality exists in one of the anode and cathode of a fuel cell stack; if the abnormal sensor type is a type that participates in logic control calculations, obtaining an average cell voltage of the fuel cell and a first inlet pressure value of the other of the anode and cathode of the stack where no abnormal sensor exists; determining a second inlet pressure value of one of the anode and cathode of the stack based on the average cell voltage and the first inlet pressure value, and controlling the operation of the fuel cell based on the first inlet pressure value and the second inlet pressure value.

[0005] Through the above technical scheme, when an abnormal sensor appears in the anode and cathode of the fuel cell stack and the type of the abnormal sensor is a type that participates in logic control calculations, the second inlet pressure value of one of the anode and cathode of the stack can be determined based on the average single cell voltage and the first inlet pressure value of the other of the anode and cathode of the stack where the abnormal sensor does not exist, and the operation of the fuel cell is further controlled based on the first inlet pressure value and the second inlet pressure value, thereby avoiding emergency stop measures when a sensor abnormality occurs in the fuel cell system, resulting in limited use functions, and ensuring that the system does not immediately report an error and shut down, affecting operations.

[0006] In combination with the first aspect, in some possible implementations, determining the second inlet pressure value of one of the anode and cathode of the fuel cell stack based on the average cell voltage and the first inlet pressure value includes: using the average cell voltage and the first inlet pressure value as indexes, querying a database, and outputting the second inlet pressure value of one of the anode and cathode of the fuel cell stack.

[0007] Through the above technical solution, the second inlet pressure value of one of the anode and the cathode of the fuel cell stack can be determined according to the average cell voltage and the first inlet pressure value.

[0008] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, before controlling the operation of the fuel cell according to the first inlet pressure value and the second inlet pressure value, it also includes: obtaining the fluctuation range of the average cell voltage; if the fluctuation range is within a preset range, controlling the operation of the fuel cell according to the first inlet pressure value and the second inlet pressure value, otherwise correcting the second inlet pressure value, and controlling the operation of the fuel cell according to the corrected second inlet pressure value and the first inlet pressure value.

[0009] Through the above technical solution, before controlling the operation of the fuel cell according to the first inlet pressure value and the second inlet pressure value, it is possible to determine whether the average cell voltage is within the fluctuation range. If it is within the fluctuation range, the operation of the fuel cell is controlled according to the first inlet pressure value and the second inlet pressure value. If it exceeds the fluctuation range, it indicates that the provided pressure value cannot meet the normal and safe operation of the fuel cell, and the pressure value can be corrected to meet the conditions.

[0010] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, the correcting the second inlet pressure value includes: obtaining a pressure correction value of the second inlet pressure value; calculating a target pressure value based on the pressure correction value and the second inlet pressure value, and correcting the second inlet pressure value to the target pressure value, wherein the target pressure value is greater than the second inlet pressure value.

[0011] Through the above technical solution, the target pressure value can be calculated according to the second inlet pressure value and the pressure correction value, and the target pressure value can be used as the second inlet pressure value.

[0012] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, after controlling the operation of the fuel cell according to the corrected second inlet pressure value and the first inlet pressure value, it also includes: obtaining the first duration of the operation of the fuel cell; if the first duration is greater than the first preset duration and the fluctuation range is not within the preset range, obtaining the minimum voltage mean within the fluctuation range; and controlling the fuel cell to output the power corresponding to the minimum voltage mean.

[0013] Through the above technical solution, it is possible to determine that the first duration of the fuel cell operation exceeds the first preset duration and the fluctuation range is not within the preset range, obtain the minimum average cell voltage, and control the fuel cell to output the power corresponding to the minimum average cell voltage.

[0014] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, after identifying an abnormal sensor type that indicates an abnormality in one of the anode and cathode of the fuel cell stack, it also includes: if the sensor type is a type that does not participate in control logic calculations, maintaining the operation of the fuel cell.

[0015] Through the above technical solution, when the abnormal sensor type is a type that does not participate in the control logic calculation, the fuel cell operation can be maintained, and there will be no rash error shutdown that affects the operation of the fuel cell system.

[0016] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, before identifying the abnormal sensor type in which there is an abnormality in one of the anode and cathode of the fuel cell stack, it also includes: detecting a second duration of a preset fault in the sensor; if the second duration is greater than the second preset duration, determining that the sensor is an abnormal sensor.

[0017] Through the above technical solution, after the sensor failure continues for a certain period of time, the sensor can be judged as an abnormal sensor to prevent misjudgment.

[0018] In a second aspect, a fuel cell control device with sensor abnormality is provided, the device comprising: an identification module for identifying the type of abnormal sensor in which one of the anode and cathode of the fuel cell stack has an abnormality; an acquisition module for acquiring an average cell voltage of the fuel cell and a first inlet pressure value of the other of the anode and cathode of the stack where no abnormal sensor is present, if the abnormal sensor type is a type that participates in control logic calculation; a first control module for determining a second inlet pressure value of one of the anode and cathode of the stack based on the average cell voltage and the first inlet pressure value, and controlling the operation of the fuel cell based on the first inlet pressure value and the second inlet pressure value.

[0019] In combination with the second aspect, in some possible implementations, the first control module is further used to: query a database using the voltage average and the first inlet pressure value as indexes, and output a second inlet pressure value of one of the anode and cathode of the stack.

[0020] In combination with the second aspect and the above-mentioned implementation methods, in some possible implementation methods, the fuel cell control device with sensor abnormality also includes: a correction module, which is used to obtain the fluctuation range of the average single cell voltage before controlling the operation of the fuel cell according to the first inlet pressure value and the second inlet pressure value; if the fluctuation range is within a preset range, the operation of the fuel cell is controlled according to the first inlet pressure value and the second inlet pressure value; otherwise, the second inlet pressure value is corrected, and the operation of the fuel cell is controlled according to the corrected second inlet pressure value and the first inlet pressure value.

[0021] In combination with the second aspect and the above-mentioned implementation methods, in some possible implementation methods, the correction module is further used to: obtain a pressure correction value of the second inlet pressure value; calculate a target pressure value based on the pressure correction value and the second inlet pressure value, and correct the second inlet pressure value to the target pressure value, wherein the target pressure value is greater than the second inlet pressure value.

[0022] In combination with the second aspect and the above-mentioned implementation methods, in some possible implementation methods, the fuel cell control device with sensor abnormality also includes: a second control module, used to obtain a first duration of the operation of the fuel cell after controlling the operation of the fuel cell according to the corrected second inlet pressure value and the first inlet pressure value; if the first duration is greater than the first preset duration and the fluctuation range is not within the preset range, obtain the minimum average cell voltage within the fluctuation range; and control the fuel cell to output the power corresponding to the minimum average cell voltage.

[0023] In combination with the second aspect and the above-mentioned implementation methods, in some possible implementation methods, the fuel cell control device with sensor abnormality also includes: a maintenance module, which is used to maintain the operation of the fuel cell after identifying the abnormal sensor type that has an abnormality in one of the anode and cathode of the fuel cell stack, if the sensor type is a type that does not participate in the control logic calculation.

[0024] In combination with the second aspect and the above-mentioned implementation methods, in some possible implementation methods, the fuel cell control device with sensor abnormality also includes: a judgment module, which is used to detect a second duration of a preset fault in the sensor before identifying the abnormal sensor type in which an abnormality exists in one of the anode and cathode of the fuel cell stack; if the second duration is greater than the second preset duration, the sensor is determined to be an abnormal sensor.

[0025] In a third aspect, a vehicle is provided, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method in the first aspect or any possible implementation of the first aspect.

[0026] In a fourth aspect, a computer-readable storage medium is provided, which stores a computer program code. When the computer program code runs on a computer, the computer executes the method in the above-mentioned first aspect or any possible implementation manner of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is the structural distribution diagram of the anode module of the fuel cell system;

[0028] Figure 2 is a flow chart of a fuel cell control method with abnormal sensor provided in an embodiment of the present application;

[0029] Figure 3 is a flow chart of a fuel cell control method with abnormal sensor provided by an embodiment of the present application;

[0030] Figure 4 It is a schematic diagram of the structure of a fuel cell control device with sensor abnormality provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] The technical solution in the present application will be described clearly and in detail below in conjunction with the accompanying drawings. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B: "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0032] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0033] Before explaining the fuel cell control method for sensor abnormality provided in the embodiment of the present application, the structure of the anode module of the fuel cell system involved in the embodiment of the present application is first explained. It should be noted that although the anode module is used as an example for explanation here, the technical solution of this case is also applicable to the cathode module. Since the technical solution applied to the cathode module is similar to the technical solution applied to the anode module, it will not be repeated.

[0034] like Figure 1As shown, the anode of the fuel cell system includes a hydrogen bottle 1, a safety valve 2, a proportional valve 3, an anode pressure sensor 4, an ejector 5, a hydrogen circulation pump 6, a gas-water separator 7, a nitrogen exhaust valve 8, a water drain valve 9 and other structures. Among them, the hydrogen bottle 1 is connected to the safety valve 2, the safety valve 2 is connected to the proportional valve 3, the proportional valve 3 is connected to the ejector 5, an anode pressure sensor 4 is arranged between the ejector 5 and the proportional valve 3, the ejector 5 is connected to the stack, the stack is also connected to the gas-water separator 7, the gas-water separator 7 is respectively connected to the nitrogen exhaust valve 8 and the water drain valve 9, and the hydrogen circulation pump 6 is also connected to the gas-water separator 7 and the nitrogen exhaust valve 8 connecting pipeline.

[0035] Figure 2 It is a schematic flow chart of a fuel cell control method with sensor abnormality provided in an embodiment of the present application.

[0036] For example, Figure 2 As shown, the method includes:

[0037] Step S101 , identifying an abnormal sensor type indicating that one of the anode and cathode of a fuel cell stack is abnormal.

[0038] Among them, the types of sensors can be divided into types that only monitor but do not participate in control logic calculations (hereinafter also referred to as types that do not participate in control logic calculations) and types that participate in control logic calculations, etc.

[0039] It should be noted that the embodiments of the present application can monitor whether there are abnormal sensors in the anode or cathode. Taking the anode as an example, the fuel cell system controller FCU can monitor the value of the anode stack pressure sensor in real time, and the fuel cell stack inspection module CVM monitors the single cell voltage value in real time. When an abnormality is detected in an anode sensor (voltage value threshold exceeds the limit, etc.), the internal logic of the controller FCU will determine whether the sensor participates in the control logic calculation or only monitors the system status without participating in the control logic calculation.

[0040] In an embodiment of the present application, before identifying the abnormal sensor type in which one of the anode and cathode of the fuel cell stack is abnormal, it also includes: detecting a second duration of a preset fault in the sensor; if the second duration is greater than the second preset duration, determining that the sensor is an abnormal sensor.

[0041] Among them, the preset faults may include complete failure faults, fixed deviation faults, drift deviation faults and reduced accuracy, etc.; the second preset time length can be set according to the specific situation, and there is no limitation on this, for example, it can be set to 1s or 2s, etc.

[0042] It is understandable that in the embodiment of the present application, after the duration of the fault of the sensor exceeds the preset duration, the sensor is determined to be an abnormal sensor to prevent misjudgment.

[0043] In the embodiment of the present application, after identifying the abnormal sensor type that indicates an abnormality in one of the anode and cathode of the fuel cell stack, the method further includes: if the sensor type is a type that does not participate in control logic calculation, maintaining the operation of the fuel cell.

[0044] It can be understood that when the sensor type that identifies an abnormality in the fuel cell does not participate in the control logic calculation, the embodiment of the present application maintains the operation of the fuel cell and does not rashly report an error and shut down to affect the operation of the fuel cell system.

[0045] Specifically, when the abnormal sensor is only used to monitor the system and does not participate in the control logic algorithm, the fault level can be set to an alarm to remind the driver that replacement is needed, and there will be no rash error shutdown that affects the operation of the fuel cell system.

[0046] Step S102, if the abnormal sensor type is a type that participates in control logic calculation, obtain the average cell voltage of the fuel cell and the first inlet pressure value of the other of the anode and cathode of the stack where the abnormal sensor does not exist.

[0047] Among them, the embodiment of the present application can monitor the single cell voltage value in real time through the battery stack inspection module CVM.

[0048] It can be understood that the embodiments of the present application can obtain the average single cell voltage and the first inlet pressure value of the other of the anode and cathode of the stack where no abnormal sensor is present, such as the cathode entry pressure, through the stack inspection module CVM when the abnormal sensor type is a type that implements a participating control function.

[0049] Step S103, determining a second inlet pressure value of one of the anode and cathode of the fuel cell stack according to the average cell voltage and the first inlet pressure value, and controlling the operation of the fuel cell according to the first inlet pressure value and the second inlet pressure value.

[0050] It can be understood that the embodiment of the present application can determine the second inlet pressure value of one of the anode and cathode of the fuel cell stack based on the average single cell voltage and the first inlet pressure value obtained in step S102, and control the operation of the fuel cell according to the first inlet pressure value and the second inlet pressure value.

[0051] In an embodiment of the present application, the second inlet pressure value of the electrode on the other side is determined based on the average cell voltage and the first inlet pressure value, including: using the average cell voltage and the first inlet pressure value as an index, querying a database, and outputting the second inlet pressure value of one of the anode and cathode of the stack.

[0052] The database stores the relationship between the voltage mean value, the first inlet pressure value and the second inlet pressure value.

[0053] It can be understood that the embodiment of the present application can query the database based on the average cell voltage and the first inlet pressure value as an index, and output the second inlet pressure value of one of the anode and cathode of the fuel cell stack.

[0054] It should be noted that during the operation of the fuel cell system, each electric density point (current density point) corresponds to an average cell voltage value, and each electric density point corresponds to the anode inlet pressure and the cathode inlet pressure value. The corresponding relationship between the average cell voltage value and the anode inlet pressure at each electric density point can be obtained through a two-dimensional table lookup (the table value can be calibrated). Among them, the performance of the fuel cell can be characterized by a current i-voltage v characteristic diagram, that is, a current-voltage curve diagram, which is specifically displayed as a voltage output under a given current output. In order to make the iV current-voltage curves of different fuel cells comparable, the current is usually standardized according to the effective area of ​​the fuel cell, that is, it is characterized by current density, which is a current density-voltage curve, that is, each electric density point corresponds to an average cell voltage value. Table 1 is a table of the correspondence between the average cell voltage and the anode inlet pressure.

[0055] Table 1

[0056]

[0057] In an embodiment of the present application, before controlling the operation of the fuel cell according to the first inlet pressure value and the second inlet pressure value, it also includes: obtaining the fluctuation range of the average cell voltage; if the fluctuation range is within a preset range, controlling the operation of the fuel cell according to the first inlet pressure value and the second inlet pressure value, otherwise correcting the second inlet pressure value, and controlling the operation of the fuel cell according to the corrected second inlet pressure value and the first inlet pressure value.

[0058] Among them, the preset range can be set according to specific circumstances and is not limited to this.

[0059] It should be noted that the average single cell voltage monitored by the electrical inspection module CVM can intuitively show whether the system performance is operating normally.

[0060] It can be understood that in the embodiment of the present application, the fluctuation range of the average cell voltage of the battery is within the preset fluctuation range, and the fuel cell is controlled to work according to the first inlet pressure value and the second inlet pressure value. If the fluctuation range of the average cell voltage exceeds the preset fluctuation range, the second inlet pressure value is corrected, and the fuel cell is controlled to work according to the corrected second inlet pressure value and the first inlet pressure value. The correction method will be described in the following embodiments and will not be repeated here.

[0061] Specifically, when the key sensor at the anode inlet is abnormal but the CVM average cell voltage is normal (under constant power conditions, the mean fluctuation is less than the threshold (TBD)), it can be determined that the system is in a safe operating state, and the sensor failure will not temporarily cause system performance damage, and the system continues to operate at the original power. If the sensor is abnormal, the stack inspection module CVM detects that the average cell voltage fluctuates greatly (for example, the fluctuation threshold > 50mV (TBD)) under constant power, then the internal logic of the FCU determines that at this power, the second pressure value cannot meet the normal and safe operation of this power point, so the second pressure value is corrected, and the fuel cell operation is controlled according to the corrected second inlet pressure value and the first inlet pressure value.

[0062] In an embodiment of the present application, correcting the second inlet pressure value includes: obtaining a pressure correction value of the second inlet pressure value; calculating a target pressure value based on the pressure correction value and the second inlet pressure value, and correcting the second inlet pressure value to the target pressure value, wherein the target pressure value is greater than the second inlet pressure value.

[0063] Among them, the pressure correction value can be set to 5KPa.

[0064] It can be understood that the embodiment of the present application can calculate the target pressure value based on the second inlet pressure value and the first inlet pressure value, correct the second inlet pressure value to the target pressure value, and further control the operation of the fuel cell based on the corrected second inlet pressure value and the first inlet pressure value.

[0065] In an embodiment of the present application, after controlling the operation of the fuel cell according to the corrected second inlet pressure value and the first inlet pressure value, it also includes: obtaining a first duration of the operation of the fuel cell; if the first duration is greater than a first preset duration and the fluctuation range is not within the preset range, obtaining a minimum average cell voltage within the fluctuation range; and controlling the fuel cell to output a power corresponding to the minimum average cell voltage.

[0066] Among them, the first preset time length can be set according to the specific situation, and there is no limitation on this. For example, it can be set to 5s or 6s.

[0067] It can be understood that in the embodiment of the present application, after the second inlet pressure value and the first inlet pressure value are corrected, when the first duration of the fuel cell operation is greater than the first preset duration and the fluctuation range is not within the preset range, that is, after the second inlet pressure value is corrected, the problem of the average single cell voltage fluctuation still cannot be solved, then the system output power is reduced to the power value corresponding to the lowest point of the average single cell voltage.

[0068] Specifically, the process of the fuel cell control method for sensor abnormality in the embodiment of the present application is as follows: Figure 3As shown, taking the abnormal sensor of the anode of the fuel cell as an example, the following steps are included:

[0069] 1. Monitor the hydrogen inlet pressure and determine whether there is any abnormality in the pressure sensor;

[0070] 2. If there is no abnormality in the pressure sensor, the system operates normally and the process ends; if there is an abnormality in the pressure sensor, determine whether it is a key sensor involved in control. If not, the system operates normally and the process ends. If so, go to step 3.

[0071] 3. Use an alternative sensor and obtain the average cell voltage (voltage mean) and cathode pressure by two-dimensional table lookup.

[0072] 4. Detect the average single cell voltage fluctuation range. If the average single cell voltage fluctuation range is less than a certain threshold, directly use the replacement sensor. If the average single cell voltage fluctuation range is greater than the preset range, go to step 5.

[0073] 5. Increase the anode pressure setting value, for example, increase it by 5KPa. Determine whether the voltage mean is stable. If it is stable, end the process. If it is not stable, go to step 6.

[0074] 6. Reduce the load power according to the power at the lowest point of the average single cell voltage, the system continues to run, and the process ends.

[0075] In summary, in the fuel cell system structure, the fuel cell controller FCU is responsible for real-time monitoring of the value of the anode stack pressure sensor, and the stack inspection module CVM monitors the single cell voltage value in real time. When an anode sensor is detected to be abnormal (voltage value threshold exceeds the limit, etc.), the internal logic of the controller FCU will determine whether the sensor participates in the control logic calculation or only monitors the system status and does not participate in the control logic calculation:

[0076] (1) When the sensor is only used to monitor the system and does not participate in the control logic calculation, the fault level is set to alarm to remind the driver that it needs to be replaced, and it will not rashly report an error and shut down to affect the operation of the fuel cell system;

[0077] (2) When an abnormal sensor participates in the control logic calculation, and the fault persists for more than 1 second (tentative threshold) and cannot be recovered after it occurs, it is assumed that the sensor is abnormal and cannot be repaired for the time being. A virtual replacement sensor intervenes to take over the work of the original sensor.

[0078] The virtual sensor value comes from two parts: first, the average cell voltage value of the fuel cell stack inspection module CVM, and second, the cathode input pressure. The average cell voltage monitored by the inspection module CVM can intuitively show the system performance and whether it is operating normally, that is, if the key sensor at the anode entrance is abnormal but the average cell voltage of CVM is normal (under constant power conditions, the mean fluctuation is less than the threshold (TBD)), it can be determined that the system is in a safe operating state, and sensor failure will not temporarily cause damage to system performance, and the system will continue to operate at the original power.

[0079] During the operation of the fuel cell system, each electrical density point corresponds to an average cell voltage value. At the same time, each electrical density point corresponds to the anode inlet pressure and the cathode inlet pressure value. The corresponding relationship between the average cell voltage value and the anode inlet pressure at each electrical density point can be obtained through a two-dimensional table lookup (the table value can be calibrated).

[0080] If the sensor is abnormal, the stack inspection module CVM detects that the average cell voltage fluctuates greatly (fluctuation threshold > 50mV TBD) under constant power. When the internal logic of the FCU determines that the pressure value provided by the replacement sensor cannot meet the normal and safe operation of the power point, the anode set pressure value should be increased by 5KPa, and a slightly excessive amount of hydrogen should be provided to protect the stack. When the anode set pressure value increases by 5KPa for 3s, the voltage average is judged:

[0081] (1) The average cell voltage value is stable at this power point, and it can be considered that the alternative sensor can work normally.

[0082] (2) If the problem of average cell voltage fluctuation cannot be solved after increasing the anode pressure value, reduce the system output power to the power value corresponding to the lowest point of the voltage average.

[0083] According to the embodiment of the present application, a fuel cell control method with sensor abnormality is proposed. When an abnormal sensor appears in the anode and cathode of the fuel cell stack and the type of the abnormal sensor is a type that participates in the control logic calculation, the second inlet pressure value of one of the anode and cathode of the stack can be determined according to the average single cell voltage and the first inlet pressure value of the other of the anode and cathode of the stack where the abnormal sensor does not exist, and the operation of the fuel cell is further controlled according to the first inlet pressure value and the second inlet pressure value, so as to avoid taking emergency stop measures when a sensor abnormality occurs in the fuel cell system, resulting in limited use functions, and ensure that the system does not immediately report an error and shut down, affecting operation.

[0084] Figure 4 It is a structural schematic diagram of a fuel cell control device with sensor abnormality provided in an embodiment of the present application.

[0085] For example, Figure 4As shown, the device 10 may include: an identification module 100 , an acquisition module 200 and a first control module 300 .

[0086] Identification module 100: an abnormal sensor type for identifying that an abnormality exists in one of the anode and cathode of a fuel cell stack;

[0087] Acquisition module 200: for acquiring, if the abnormal sensor type is a type that participates in control logic calculation, an average cell voltage of the fuel cell and a first inlet pressure value of the other of the anode and cathode of the stack where no abnormal sensor exists;

[0088] The first control module 300 is used to determine the second inlet pressure value of one of the anode and cathode of the fuel cell stack according to the average cell voltage and the first inlet pressure value, and control the operation of the fuel cell according to the first inlet pressure value and the second inlet pressure value.

[0089] In the embodiment of the present application, the first control module 300 is further used to: query the database using the voltage average and the first inlet pressure value as indexes, and output the second inlet pressure value of one of the anode and cathode of the stack.

[0090] In the embodiment of the present application, the device 10 of the embodiment of the present application further includes: a correction module.

[0091] Among them, the correction module is used to obtain the fluctuation range of the average single cell voltage before controlling the operation of the fuel cell according to the first inlet pressure value and the second inlet pressure value; if the fluctuation range is within the preset range, the operation of the fuel cell is controlled according to the first inlet pressure value and the second inlet pressure value, otherwise the second inlet pressure value is corrected, and the operation of the fuel cell is controlled according to the corrected second inlet pressure value and the first inlet pressure value.

[0092] In an embodiment of the present application, the correction module is further used to: obtain a pressure correction value of the second inlet pressure value; calculate a target pressure value based on the pressure correction value and the second inlet pressure value, and correct the second inlet pressure value to the target pressure value, wherein the target pressure value is greater than the second inlet pressure value.

[0093] In the embodiment of the present application, the device 10 of the embodiment of the present application further includes: a second control module.

[0094] Among them, the second control module is used to obtain the first duration of the fuel cell operation after controlling the operation of the fuel cell according to the corrected second inlet pressure value and the first inlet pressure value; if the first duration is greater than the first preset duration and the fluctuation range is not within the preset range, obtain the minimum average single cell voltage within the fluctuation range; and control the fuel cell to output the power corresponding to the minimum average single cell voltage.

[0095] In the embodiment of the present application, the device 10 of the embodiment of the present application further includes: a maintaining module.

[0096] The maintenance module is used to maintain the operation of the fuel cell after identifying an abnormal sensor type that is abnormal in one of the anode and cathode of the fuel cell stack, if the sensor type is a type that does not participate in the control logic calculation.

[0097] In the embodiment of the present application, the device 10 of the embodiment of the present application further includes: a judgment module.

[0098] Among them, the judgment module is used to detect the second duration of a preset fault in the sensor before identifying the abnormal sensor type that has an abnormality in one of the anode and cathode of the fuel cell stack; if the second duration is greater than the second preset duration, the sensor is determined to be an abnormal sensor.

[0099] According to the fuel cell control device with sensor abnormality proposed in the embodiment of the present application, when an abnormal sensor appears in the anode and cathode of the fuel cell stack and the type of the abnormal sensor is a type that realizes the participation in the control function, the second inlet pressure value of one of the anode and cathode of the stack can be determined according to the average single cell voltage and the first inlet pressure value of the other of the anode and cathode of the stack where the abnormal sensor does not exist, and the operation of the fuel cell can be further controlled according to the first inlet pressure value and the second inlet pressure value, so as to avoid taking emergency stop measures when a sensor abnormality appears in the fuel system, resulting in limited use of functions, and ensure that the system does not immediately report an error and shut down, affecting operation.

[0100] In addition, an embodiment of the present application also protects a vehicle, which may include a memory and a processor, wherein the memory stores an executable program code, and the processor is used to call and execute the executable program code to execute the fuel cell control method for sensor abnormality provided in an embodiment of the present application.

[0101] This embodiment also provides a computer-readable storage medium, in which a computer program code is stored. When the computer program code is executed on a computer, the computer executes the above-mentioned related method steps to implement the method for controlling a fuel cell with abnormal sensors provided in the above embodiment.

[0102] Among them, the device, computer-readable storage medium or chip provided in this embodiment is used to execute the corresponding method provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding method provided above, and will not be repeated here.

[0103] Through the description of the above implementation methods, technical personnel in the relevant field can understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0104] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, 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 through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0105] The above contents are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A fuel cell control method for sensor abnormality, characterized in that: The method comprises: An abnormal sensor type that identifies an abnormality in one of the anode and cathode of a fuel cell stack; If the abnormal sensor type is a type that participates in control logic calculation, obtaining an average cell voltage of the fuel cell and a first inlet pressure value of the other of the anode and cathode of the stack where no abnormal sensor exists; A second inlet pressure value of one of the anode and cathode of the stack is determined according to the average cell voltage and the first inlet pressure value, and the operation of the fuel cell is controlled according to the first inlet pressure value and the second inlet pressure value.

2. The method according to claim 1, characterized in that: The determining a second inlet pressure value of one of the anode and cathode of the stack according to the average cell voltage and the first inlet pressure value comprises: The average cell voltage and the first inlet pressure value are used as indexes to query a database and output a second inlet pressure value of one of the anode and cathode of the stack.

3. The method according to claim 1, characterized in that Before controlling the operation of the fuel cell according to the first inlet pressure value and the second inlet pressure value, the method further includes: Obtaining a fluctuation range of the average cell voltage; If the fluctuation range is within the preset range, the fuel cell is controlled to operate according to the first inlet pressure value and the second inlet pressure value; otherwise, the second inlet pressure value is corrected, and the fuel cell is controlled to operate according to the corrected second inlet pressure value and the first inlet pressure value.

4. The method according to claim 3, characterized in that The correcting the second inlet pressure value comprises: Obtaining a pressure correction value of the second inlet pressure value; A target pressure value is calculated according to the pressure correction value and the second inlet pressure value, and the second inlet pressure value is corrected to the target pressure value, wherein the target pressure value is greater than the second inlet pressure value.

5. The method according to claim 3, characterized in that: After controlling the operation of the fuel cell according to the corrected second inlet pressure value and the first inlet pressure value, the method further includes: Obtaining a first duration of operation of the fuel cell; If the first duration is greater than a first preset duration and the fluctuation range is not within the preset range, obtaining a minimum average cell voltage within the fluctuation range; The fuel cell is controlled to output power corresponding to the minimum average cell voltage.

6. The method according to claim 1, characterized in that After identifying the abnormal sensor type that one of the anode and cathode of the fuel cell stack is abnormal, the method further includes: If the sensor type is a type that does not participate in control logic calculation, the fuel cell is maintained in operation.

7. The method according to claim 1 or 6, characterized in that: Before the abnormal sensor type is identified that one of the anode and cathode of the fuel cell stack is abnormal, it also includes: A second duration of a preset fault of the detection sensor; If the second duration is greater than a second preset duration, the sensor is determined to be an abnormal sensor.

8. A fuel cell control device with abnormal sensor, characterized in that: The device comprises: An identification module, used to identify an abnormal sensor type that indicates an abnormality in one of an anode and a cathode of a fuel cell stack; an acquisition module, for acquiring, if the abnormal sensor type is a type that participates in control logic calculation, an average cell voltage of the fuel cell and a first inlet pressure value of the other of the anode and cathode of the stack where no abnormal sensor exists; The first control module is used to determine a second inlet pressure value of one of the anode and cathode of the stack according to the average cell voltage and the first inlet pressure value, and control the operation of the fuel cell according to the first inlet pressure value and the second inlet pressure value.

9. A vehicle, characterized in that: The vehicle comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method according to any one of claims 1 to 7.

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

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