CN117367781A - Fuel cell system electromagnetic valve fault detection method and device and electronic equipment - Google Patents
Fuel cell system electromagnetic valve fault detection method and device and electronic equipment Download PDFInfo
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- CN117367781A CN117367781A CN202311329974.XA CN202311329974A CN117367781A CN 117367781 A CN117367781 A CN 117367781A CN 202311329974 A CN202311329974 A CN 202311329974A CN 117367781 A CN117367781 A CN 117367781A
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- 239000000446 fuel Substances 0.000 title claims abstract description 55
- 238000001514 detection method Methods 0.000 title claims abstract description 52
- 239000007788 liquid Substances 0.000 claims abstract description 71
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 63
- 239000001257 hydrogen Substances 0.000 claims abstract description 63
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 63
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
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- 229910052760 oxygen Inorganic materials 0.000 description 2
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- 239000000376 reactant Substances 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The application provides a method, a device and electronic equipment for detecting faults of an electromagnetic valve of a fuel cell system, and relates to the technical field of fuel cells, wherein the method comprises the following steps: under the condition that auxiliary hydrogen injection is not in a working state, comparing the absolute pressure deviation at the current moment with a set threshold value to obtain a comparison result, wherein the absolute pressure deviation is the difference value between the actual pressure and the theoretical pressure of an inlet of the ejector; determining whether the normally open faults exist in the exhaust valve and the drain valve according to the comparison result; if the exhaust valve and the drain valve have no normally open faults, determining whether the drain valve has normally closed faults according to the liquid level state indicated by the liquid level sensor, and determining whether the exhaust valve has normally closed faults according to the pressure value change condition of the inlet of the ejector before and after the exhaust valve is opened. By adopting the method, the device and the electronic equipment for detecting the solenoid valve faults of the fuel cell system, the problems of low detection accuracy and high detection cost during the solenoid valve fault detection are solved.
Description
Technical Field
The present disclosure relates to the field of fuel cells, and in particular, to a method and an apparatus for detecting a fault of an electromagnetic valve of a fuel cell system, and an electronic device.
Background
The basic working principle of the fuel cell is that hydrogen and oxygen react electrochemically under the action of a catalyst to convert chemical energy into electric energy, and the reactant is only water. In order to enable the power generation reaction of the fuel cell to be normally performed, an exhaust valve and a drain valve are generally arranged on the hydrogen side of the fuel cell for a vehicle, the exhaust valve and the drain valve are all electromagnetic valves, and have no internal fault feedback function, and when the exhaust valve or the drain valve cannot be opened due to abnormality, the phenomenon reflected on an engine is voltage reduction and power generation cannot be continued, but the reasons for reducing the voltage of the engine are numerous, and specific reasons are difficult to locate. Currently, it is generally determined whether an abnormality occurs in the exhaust valve or the drain valve by the following two methods: firstly, detecting whether the exhaust valve or the drain valve is abnormal or not through the increase of the hydrogen injection duty ratio when the exhaust valve or the drain valve is normally open; second, by adding a flow meter at the hydrogen inlet of the fuel cell system, whether or not abnormality occurs in the gas or water discharge valve is detected by a flow change of the gas or water discharge valve at the time of opening/closing.
However, in the first method, the hydrogen injection duty ratio is related to not only the flow rate but also the resistance of the solenoid valve of the hydrogen injector, and the resistance of the solenoid valve increases with the increase in temperature when the nozzle is operated, resulting in a problem of low accuracy in detecting abnormality of the solenoid valve. The flow meter added in the second method is high in price, so that the problem of high abnormal detection cost of the electromagnetic valve is caused.
Disclosure of Invention
In view of the foregoing, an object of the present application is to provide a method, an apparatus and an electronic device for detecting a solenoid valve failure of a fuel cell system, so as to solve the problems of low detection accuracy and high detection cost when detecting the solenoid valve failure.
In a first aspect, an embodiment of the present application provides a method for detecting a fault of a solenoid valve of a fuel cell system, including:
under the condition that auxiliary hydrogen injection is not in a working state, comparing the absolute pressure deviation at the current moment with a set threshold value to obtain a comparison result, wherein the absolute pressure deviation is the difference value between the actual pressure and the theoretical pressure of an inlet of the ejector;
determining whether the normally open faults exist in the exhaust valve and the drain valve according to the comparison result;
if the exhaust valve and the drain valve have no normally open faults, determining whether the drain valve has normally closed faults according to the liquid level state indicated by the liquid level sensor, and determining whether the exhaust valve has normally closed faults according to the pressure value change condition of the inlet of the ejector before and after the exhaust valve is opened.
Optionally, the set threshold includes a first set threshold and a second set threshold, and determining, according to a comparison result, whether both the exhaust valve and the drain valve have normally open faults includes: if the absolute pressure deviation is greater than or equal to a first set threshold value, determining that normally open faults exist in the exhaust valve and the drain valve; and if the absolute deviation of the pressure is smaller than or equal to a second set threshold value, determining that the normally open faults exist in the exhaust valve and the drain valve.
Optionally, after comparing the absolute deviation of the pressure at the current time with the set threshold value, the method further includes: if the absolute pressure deviation is between the first set threshold value and the second set threshold value, selecting continuous target solenoid valve opening periods as a plurality of first opening periods from the new current moment; for each first opening period, determining a first actual differential pressure value corresponding to the first opening period; determining whether each first actual pressure difference value is larger than a target theoretical pressure difference value, wherein the target theoretical pressure difference value is a theoretical pressure difference value at the inlet of the ejector before and after the target electromagnetic valve is opened; if all the first actual pressure difference values are larger than the target theoretical pressure difference value, determining that the target electromagnetic valve is in a normal state, otherwise, determining that the target electromagnetic valve has a normally open fault.
Optionally, determining whether the drain valve has a normally closed fault according to the liquid level state indicated by the liquid level sensor includes: acquiring a liquid level state indicated by a liquid level sensor after the drain valve is opened; if the liquid level state is changed from high to low after the drain valve is opened, determining that the drain valve has no normally closed fault; if the liquid level state is still high after the drain valve is opened, the drain period is shortened, and whether the drain valve has a normally closed fault is determined according to the change of the liquid level state after the drain period is shortened.
Optionally, determining whether the drain valve has a normally closed fault according to the liquid level state change after shortening the drain period includes: after shortening the drainage period, selecting a continuous new drainage valve opening period as a plurality of second opening periods; for each second opening period, determining a second actual differential pressure value corresponding to the second opening period; if the liquid level state is changed from high to low in a plurality of second opening periods, determining that the drain valve is in a normal state; if the liquid level state does not become low in the multiple second opening periods and each second actual pressure difference value is smaller than a second theoretical pressure difference value, determining that a normally closed fault exists in the drain valve, wherein the second theoretical pressure difference value is a theoretical pressure difference value at the inlet of the ejector before and after the drain valve is opened; if the liquid level state does not become low in the plurality of second opening periods and a second actual differential pressure value which is larger than or equal to a second theoretical differential pressure value exists in the plurality of second actual differential pressure values, determining that the normally closed fault does not exist in the drain valve, and the fault exists in the liquid level sensor.
Optionally, determining whether the exhaust valve has a normally closed fault according to a pressure value change condition of the inlet of the ejector before and after the exhaust valve is opened, including: from the latest current moment, selecting a continuous new exhaust valve opening period as a plurality of third opening periods; for each third opening period, determining a third actual differential pressure value corresponding to the third opening period; if the plurality of third actual pressure difference values are smaller than the first theoretical pressure difference value, determining that the normally closed fault exists in the exhaust valve, wherein the first theoretical pressure difference value is a theoretical pressure difference value at the inlet of the ejector before and after the exhaust valve is opened; and if the third actual differential pressure value which is greater than or equal to the first theoretical differential pressure value exists in the plurality of third actual differential pressure values, determining that the exhaust valve is in a normal state.
Optionally, the actual differential pressure value corresponding to each on period is determined by: for each opening period, acquiring a plurality of pre-opening pressure values and a plurality of post-opening pressure values corresponding to the opening period, wherein each pre-opening pressure value is a pressure value at an inlet of the injector in a first preset time interval before the target electromagnetic valve is opened in the opening period, and each post-opening pressure value is a pressure value at an inlet of the injector in a second preset time interval after the target electromagnetic valve is opened in the opening period; taking the average value of the plurality of opening front pressure values as a front pressure average value, and taking the average value of the plurality of opening rear pressure values as a rear pressure average value; and taking the difference value between the front pressure average value and the rear pressure average value as an actual pressure difference value corresponding to the opening period.
In a second aspect, embodiments of the present application further provide a device for detecting a fault of a solenoid valve of a fuel cell system, where the device includes:
the numerical comparison module is used for comparing the absolute pressure deviation at the current moment with a set threshold value under the condition that the auxiliary hydrogen injection is not in a working state, and obtaining a comparison result, wherein the absolute pressure deviation is the difference value between the actual pressure and the theoretical pressure of the inlet of the ejector;
the first fault determining module is used for determining whether normally open faults exist in the exhaust valve and the drain valve according to the comparison result;
and the second fault determining module is used for determining whether the drain valve has normally closed faults according to the liquid level state indicated by the liquid level sensor and determining whether the drain valve has normally closed faults according to the pressure value change condition of the inlet of the ejector before and after the vent valve is opened if the vent valve and the drain valve have normally open faults.
In a third aspect, embodiments of the present application further provide an electronic device, including: the system comprises a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, the processor and the memory are communicated through the bus when the electronic device is running, and the machine-readable instructions are executed by the processor to perform the steps of the fuel cell system electromagnetic valve fault detection method.
In a fourth aspect, embodiments of the present application also provide a computer readable storage medium having a computer program stored thereon, which when executed by a processor performs the steps of the fuel cell system solenoid valve fault detection method as described above.
The embodiment of the application brings the following beneficial effects:
according to the electromagnetic valve fault detection method, the electromagnetic valve fault detection device and the electronic equipment for the fuel cell system, whether normally open faults exist in the exhaust valve and the drain valve or not can be determined according to the difference value between the actual pressure and the theoretical pressure of the inlet of the ejector, if the normally open faults do not exist in the exhaust valve and the drain valve, whether normally closed faults exist in the drain valve or not is further determined according to the liquid level state, whether normally closed faults exist in the exhaust valve or not is determined according to the pressure value at the inlet of the ejector or not, electromagnetic valve fault detection is carried out without using a flowmeter and a hydrogen injection duty ratio, and compared with the electromagnetic valve fault detection method for the fuel cell system in the prior art, the problems that detection accuracy is low and detection cost is high when electromagnetic valve fault detection is carried out are solved.
In order to make the above objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 shows a flow chart of a fuel cell system solenoid valve fault detection method provided by an embodiment of the present application;
FIG. 2 shows a schematic diagram of a fuel cell hydrogen subsystem provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of a solenoid valve failure detection device of a fuel cell system according to an embodiment of the present disclosure;
fig. 4 shows a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. Based on the embodiments of the present application, every other embodiment that a person skilled in the art would obtain without making any inventive effort is within the scope of protection of the present application.
It is noted that, before the present application, the basic working principle of the fuel cell is that hydrogen and oxygen react electrochemically under the action of a catalyst, so that chemical energy is converted into electric energy, and only water is used as a reactant. The purity of the hydrogen source in the fuel cell for a vehicle is required to be 99.99% or more, and the hydrogen concentration on the hydrogen side where the reaction occurs in the fuel cell is generally required to be 80% or more. The chemical reaction generates water on the air side, and as the amount of water increases, the generated water permeates from the cathode to the anode (hydrogen side) of the fuel cell by diffusion, and nitrogen and other impurity gases in the air permeate from the cathode. The water on the anode side can block the channel flowing between the hydrogen and the surface of the catalyst, the nitrogen and other magazine gases are too much, the hydrogen concentration on the anode side can be reduced, the hydrogen amount on the surface of the catalyst is reduced, the two conditions can influence the power generation reaction of the fuel cell, so that an exhaust valve and a drain valve are needed to be added on the hydrogen side, the exhaust valve is used for discharging accumulated impurity gas, the drain valve is used for discharging excessive water, and the hydrogen concentration and the water content on the anode side are ensured to be in a normal requirement range. However, the exhaust valve and the drain valve are both solenoid valves, and have no internal fault feedback function, when the exhaust valve or the drain valve cannot be opened due to abnormality, the phenomenon reflected on the engine is voltage reduction, and power generation cannot be continued, but the cause of the voltage reduction of the engine is many, the problem of the exhaust valve or the drain valve is difficult to locate, or other causes cause the voltage reduction of the engine. In addition, when the exhaust valve and the drain valve are normally opened, the concentration of hydrogen in the tail gas is too high, so that the problem of hydrogen safety is caused.
Currently, it is generally determined whether an abnormality occurs in the exhaust valve or the drain valve by the following two methods: firstly, detecting whether the exhaust valve or the drain valve is abnormal or not through the increase of the hydrogen injection duty ratio when the exhaust valve or the drain valve is normally open; second, by adding a flow meter at the hydrogen inlet of the fuel cell system, whether or not abnormality occurs in the gas or water discharge valve is detected by a flow change of the gas or water discharge valve at the time of opening/closing. However, in the first method, the hydrogen flow is estimated by using the hydrogen injection duty ratio and the MAP of the hydrogen injector, but the hydrogen injection duty ratio is related to the flow, and is related to the resistance of the solenoid valve of the hydrogen injector, the resistance of the solenoid valve is increased along with the increase of the temperature when the nozzle works, and the MAP cannot be calibrated in real time. The flow meter added in the second method is high in price, and at present, no vehicle-mounted hydrogen flow meter is used for detecting the vehicle-mounted hydrogen flow, and the scheme for adding the flow meter is only suitable for the scenes of a laboratory.
Based on the above, the embodiment of the application provides a method for detecting the solenoid valve fault of a fuel cell system, so as to improve the detection accuracy and reduce the detection cost when the solenoid valve fault is detected.
Referring to fig. 1, fig. 1 is a flowchart of a method for detecting a fault of a solenoid valve of a fuel cell system according to an embodiment of the present application. As shown in fig. 1, the method for detecting the fault of the electromagnetic valve of the fuel cell system provided in the embodiment of the application includes:
step S101, comparing the absolute pressure deviation at the current moment with a set threshold value to obtain a comparison result under the condition that the auxiliary hydrogen injection is not in an operating state.
In this step of the process, the process is carried out,the absolute pressure deviation is the difference between the actual pressure at the inlet of the ejector and the theoretical pressure. The absolute deviation of the pressure changes along with the change of time, and the current moment is taken as T 1 For example, the theoretical pressure is noted as: p (P) 0 The actual pressure is noted as: p (P) act At the current time T 1 The absolute deviation of the pressure is noted as: p (P) T1 P is then T1 ＝P act -P 0 。
The threshold value is set as a calibration value, and is calibrated and determined in a mode of normally opening the exhaust valve and/or the drain valve during operation. The set threshold includes a first set threshold and a second set threshold. The first set threshold value is obtained by calibrating the pressure at the inlet of the ejector when the exhaust valve and the drain valve are simultaneously opened, and is recorded as: p (P) high . The second set threshold is obtained by calibrating the pressure at the inlet of the ejector when the exhaust valve or the drain valve is opened, and the second set threshold is recorded as: p (P) mid 。
In the embodiment of the application, the fault detection method of the electromagnetic valve of the fuel cell system is applied to a controller of the fuel cell system, and fault detection is carried out on the drain valve and the exhaust valve in the fuel cell system through the controller. The fuel cell system includes a hydrogen subsystem and a controller. Fuel cells may refer to fuel cells on hydrogen-powered vehicles.
The operation of the hydrogen subsystem in the fuel cell system will be described with reference to fig. 2.
Fig. 2 shows a schematic structural diagram of a fuel cell hydrogen subsystem provided in an embodiment of the present application.
As shown in FIG. 2, the fuel cell hydrogen subsystem includes a battery PACK (PACK), a main hydrogen injection, an auxiliary hydrogen injection (bypass hydrogen injection), an injector, a water separator, an exhaust valve, a drain valve, a sensor P-0, a sensor P-1, a sensor P-2, a sensor P-3, and related piping. The PACK comprises a pile, a wire harness and the like, wherein the pile is used for generating electricity; sensor P-0 is a pressure sensor at the hydrogen injector; the sensor P-1 is a pressure sensor at the inlet of the ejector; the sensor P-2 is a pressure sensor at the outlet of the ejector; the sensor P-3 is an ultrasonic liquid level sensor.
Here, the fuel cell hydrogen subsystem is also called a fuel cell engine hydrogen subsystem, the sensor P-0 is used for collecting the pressure at the hydrogen injection port, the sensor P-1 is used for collecting the pressure at the inlet of the injector, the sensor P-2 is used for collecting the pressure at the converging position of the injector and the auxiliary hydrogen injection, the sensor P-3 is used for detecting the liquid level state at the water distributing part, and when the liquid level state is high, the drain valve is opened for draining.
Specifically, when the running power of the vehicle is large, for example: when the vehicle runs at a high speed, the required hydrogen amount can be increased, and if the main hydrogen jet and the ejector are only used, the sufficient hydrogen flow cannot be provided, and the auxiliary hydrogen jet has the effect of supplementing the insufficient hydrogen flow. Therefore, only when the high-power main hydrogen injection cannot provide enough hydrogen flow, the auxiliary hydrogen injection can be involved in working, and the auxiliary hydrogen injection does not work at other times.
Along with the high hydrogen flow entering the galvanic pile, the pressure at the front end of the ejector can be increased, the increasing amplitude is large, a corresponding relation exists between the inlet pressure (the pressure acquired by the sensor P-1) of the ejector and the output current of the fuel cell in normal operation, when the exhaust valve or the drain valve is opened, the inlet pressure of the ejector can be obviously higher than the pressure when the exhaust valve or the drain valve is not opened, and whether the exhaust valve and the drain valve are abnormal or not can be detected according to the pressure change of the inlet pressure of the ejector along with the opening/closing of the exhaust valve or the drain valve so as to realize fault detection of the exhaust valve and the drain valve.
In the embodiment of the application, after the engine runs, whether the auxiliary hydrogen injection is in a working state is detected first, if the auxiliary hydrogen injection is in the working state, fault detection of the exhaust valve and the drain valve is not performed, and if the auxiliary hydrogen injection is not in the working state, fault detection of the exhaust valve and the drain valve is started. The current output current corresponding to the current time when the fault detection starts is obtained, for example: the current output current is 100A, and the theoretical pressure P at the inlet of the ejector corresponding to 100A is obtained from the MAP diagram or the test calibration value of the ejector 0 At the same time, the actual pressure P at the inlet of the ejector is collected through the sensor P-1 act Will P act And P 0 Is the difference of (2)The value is taken as the absolute deviation of the pressure. And then comparing the absolute pressure deviation with a first set threshold value and a second set threshold value to obtain a comparison result.
Step S102, determining whether normally open faults exist in the exhaust valve and the drain valve according to the comparison result.
In this step, the comparison result of the absolute deviation of the pressure with the set threshold is divided into three cases, the first is the absolute deviation P of the pressure T1 Between the first and second set threshold, P mid ＜P T1 ＜P high The method comprises the steps of carrying out a first treatment on the surface of the Second, the absolute deviation of the pressure is greater than or equal to a first set threshold, P T1 ≥P high The method comprises the steps of carrying out a first treatment on the surface of the Third, the absolute deviation of the pressure is less than or equal to a second set threshold, P T1 ≤P mid 。
For the first case, after step S101, further includes: step a1, step a2, step a3, step a4.
Step a1, if the absolute pressure deviation is between the first set threshold and the second set threshold, selecting a continuous target solenoid valve opening period as a plurality of first opening periods from a new current moment.
If P mid ＜P T1 ＜P high It is described that one of the exhaust valve and the drain valve has failed, and in this case, further confirmation is required in order to determine which solenoid valve has failed. For this purpose, a plurality of first on periods are selected, which are consecutive on periods. If the target electromagnetic valve is a drain valve, the first opening period is a plurality of periods continuous before and after the drain valve is opened, and if the target electromagnetic valve is an exhaust valve, the first opening period is a plurality of periods continuous before and after the exhaust valve is opened.
Step a2, for each first opening period, determining a first actual differential pressure value corresponding to the first opening period.
Assuming that the number of the first opening periods is N, determining a first actual differential pressure value corresponding to each first opening period, where the first actual differential pressure value is denoted as: p (P) diff1 N first actual differential pressure values can be obtainedP diff1 。
It should be noted that the first actual pressure difference value is a variable, and is calculated and updated in real time before and after the exhaust valve is opened each time, and the updated P is used for each judgment diff1 The values of the first actual differential pressure values obtained at different times are different.
Step a3, determining whether each of the first actual differential pressures is greater than the target theoretical differential pressure.
Here, the target theoretical pressure difference value is the theoretical pressure difference value at the inlet of the ejector before and after the target electromagnetic valve is opened, and is recorded as: Δp. The target theoretical differential pressure value comprises a first theoretical differential pressure value and a second theoretical differential pressure value, if the target electromagnetic valve is an exhaust valve, the target theoretical differential pressure value is a theoretical differential pressure value at the inlet of the ejector before and after the exhaust valve is opened, namely the first theoretical differential pressure value, and the first theoretical differential pressure value is recorded as: ΔP 1 The method comprises the steps of carrying out a first treatment on the surface of the If the target electromagnetic valve is a drain valve, the target theoretical pressure difference value is a theoretical pressure difference value at the inlet of the ejector before and after the drain valve is opened, namely a second theoretical pressure difference value, and the second theoretical pressure difference value is recorded as: ΔP 2 。
Specifically, for each P diff1 Determining the P diff1 If it is greater than ΔP, N comparison results are obtained in total.
And a4, if all the first actual pressure difference values are larger than the target theoretical pressure difference value, determining that the target electromagnetic valve is in a normal state, otherwise, determining that the target electromagnetic valve has a normally open fault.
When the target electromagnetic valve is an exhaust valve, if N P are diff1 Are all greater than delta P 1 Determining that the exhaust valve is normal and the drain valve has a normally open fault; if N are P diff1 Any one P diff1 Less than or equal to DeltaP 1 And determining that the drain valve is normal and the drain valve has a normally open fault.
When the target electromagnetic valve is a drain valve, if N P are diff1 Are all greater than delta P 2 Determining that the drain valve is normal and the drain valve has a normally open fault; if N are P diff1 Any one P diff1 Less than or equal to DeltaP 2 Determining that the exhaust valve is normal and the drain valve is notThere is a normally open fault.
After the fault is determined, the corresponding fault code is reported, and the corresponding fault tolerance scheme is executed.
For the second and third cases, step S102 includes: step b1 and step b2.
And b1, if the absolute deviation of the pressure is larger than or equal to a first set threshold value, determining that normally open faults exist in the exhaust valve and the drain valve.
If P T1 ≥P high And the leakage of the exhaust valve and the drain valve is indicated, at the moment, the normally open faults of the exhaust valve and the drain valve are all existed, the normally open faults of the exhaust valve, the normally open faults of the drain valve and the serious faults of hydrogen leakage are required to be reported, and the shutdown operation is immediately executed.
And b2, if the absolute deviation of the pressure is smaller than or equal to a second set threshold value, determining that the normally open faults exist in the exhaust valve and the drain valve.
If P T1 ≤P mid And the leakage of the exhaust valve and the drain valve is not caused, and the normally open faults of the exhaust valve and the drain valve are determined.
And step S103, if the exhaust valve and the drain valve have no normally open faults, determining whether the drain valve has normally closed faults according to the liquid level state indicated by the liquid level sensor, and determining whether the exhaust valve has normally closed faults according to the pressure value change condition of the inlet of the ejector before and after the exhaust valve is opened.
In this step, since the exhaust valve and the drain valve have no normally open failure, it is necessary to continuously detect whether there is a normally closed failure. Because the mode of the normally closed fault detection of the exhaust valve and the drain valve is different, the sequence of the normally closed detection of the exhaust valve and the drain valve can be not distinguished, the normally closed detection of the exhaust valve can be carried out firstly, the normally closed detection of the drain valve can be carried out firstly, and the normally closed detection of the drain valve can be carried out firstly and then.
If the drain valve has a normally closed fault, the normally closed fault is reflected on the liquid level state of the liquid level sensor, so that whether the drain valve has the normally closed fault can be determined based on the liquid level state indicated by the liquid level sensor. Meanwhile, whether the exhaust valve has normally closed faults or not can be further determined according to pressure changes of the inlet of the ejector before and after the exhaust valve is opened.
In an alternative embodiment, in step S103, determining whether the drain valve has a normally closed fault according to the liquid level state indicated by the liquid level sensor includes: step c1, step c2, step c3.
Step c1, acquiring a liquid level state indicated by a liquid level sensor after the drain valve is opened.
When normally closed fault detection is carried out on the drainage valve, the drainage valve needs to be closed, and the drainage valve is controlled to be opened according to the opening frequency of the drainage valve. At the end of the drain valve opening (i.e., closed after opening), the liquid level state indicated by the sensor P-3 is acquired. Wherein the liquid level state includes high and low.
And c2, if the liquid level state is changed from high to low after the drain valve is opened, determining that the drain valve has no normally closed fault.
If the liquid level state indicated by the ultrasonic liquid level sensor is changed from high to low after the drain valve is opened and closed, the drain valve can be normally opened and drained, and the drain valve has no normally closed fault.
And step c3, if the liquid level state is still high after the drain valve is opened, shortening the drainage period, and determining whether the drain valve has a normally closed fault according to the change of the liquid level state after shortening the drainage period.
If the liquid level state indicated by the ultrasonic liquid level sensor is still high after the drain valve is opened and closed, it is necessary to further confirm whether the drain valve is not opened, or the ultrasonic liquid level sensor itself fails, or the last time the drain is insufficient.
In order to further confirm the reason why the liquid level state is unchanged, it is necessary to shorten the drain period to observe the change of the liquid level state in the shortened drain period.
In an alternative embodiment, step c3 includes: step c31, step c32, step c33, step c34, step c35.
Step c31, after shortening the drainage period, selecting a continuous new drainage valve opening period as a plurality of second opening periods.
After the drainage period is adjusted, a new current time T is selected 2 As the second opening period, a plurality of drain valve opening periods are started in succession, for example: before shortening the drainage period, every 30s is a drainage valve opening period, every period is opened for 1s, after shortening the drainage period, every 3s is a drainage valve opening period, every period is opened for 1s, 3 periods are continuously opened, the total period is 9s, and the 3 periods are 3 second opening periods. The second opening period belongs to the drain valve opening period. Here, the number of the periods of continuous opening may be selected by those skilled in the art according to the actual situation, and the present application is not limited thereto.
Step c32, for each second opening period, determining a second actual differential pressure value corresponding to the second opening period.
Taking the above example as an example, for each of the 3 second opening periods, calculating a change of an average pressure value at an inlet of the ejector before and after the opening of the drain valve in the second opening period, where the change of the average pressure value is a second actual differential pressure value, and the second actual differential pressure value is recorded as: p (P) diff2 。
And c33, if the liquid level state is changed from high to low in a plurality of second opening periods, determining that the drain valve is in a normal state.
If the liquid level state is changed from high to low in the 3-time opening process of the drain valve, which indicates that the drain valve can drain normally, the drain valve is determined to be in a normal state.
And c34, if the liquid level state is not low and each second actual pressure difference value is smaller than the second theoretical pressure difference value in a plurality of second opening periods, determining that the normally closed fault exists in the drain valve.
Here, the second theoretical differential pressure value is a theoretical differential pressure value at the inlet of the ejector before and after the drain valve is opened.
If the liquid level state is still high and P corresponds to each second opening period in the 3-time opening process of the drain valve diff2 Are all smaller than delta P 2 And if the water discharge valve is incapable of normally discharging, determining that the water discharge valve has a normally closed fault.
And c35, if the liquid level state is not low and a second actual differential pressure value which is greater than or equal to a second theoretical differential pressure value exists in the second actual differential pressure values in the second opening periods, determining that the normally closed fault does not exist in the drain valve, and the fault exists in the liquid level sensor.
If the liquid level state is still high and there is a corresponding P of the second opening period during the 3 times of opening of the drain valve diff2 Greater than or equal to DeltaP 2 The method is characterized in that the drain valve can drain normally, the normally closed fault of the drain valve is determined, the liquid level is unchanged due to the fault of the liquid level sensor, the fault of the liquid level sensor is reported, and the working mode of the drain valve is adjusted to be opened in a fixed period, namely, the working mode returns to the working mode before the drain period is shortened.
In an optional embodiment, in step S103, determining whether the exhaust valve has a normally closed fault according to a pressure value change condition at the inlet of the ejector before and after the exhaust valve is opened includes: step d1, step d2, step d3, step d4.
And d1, selecting a continuous new exhaust valve opening period from the latest current moment as a plurality of third opening periods.
When the normally closed fault detection is carried out on the exhaust valve, the exhaust valve needs to be closed, and meanwhile, the exhaust valve is controlled to be opened. The time of normally closed fault detection of the exhaust valve is taken as the latest current time T 3 From the current time T 3 A plurality of consecutive exhaust valve opening periods are started to be selected as the third opening period, for example: likewise, 3 consecutive exhaust valve opening cycles are selected as a third opening cycle, which belongs to the exhaust valve opening cycle.
Step d2, for each third opening period, determining a third actual differential pressure value corresponding to the third opening period.
Taking the above example as an example, for each of the 3 third opening periods, calculating the change of the average pressure value at the inlet of the ejector before the exhaust valve is opened and after the exhaust valve is opened in the third opening period, where the change of the average pressure value is a third actual differential pressure value, and the third actual differential pressure value is recorded as: p (P) diff3 。
And d3, if the plurality of third actual pressure difference values are smaller than the first theoretical pressure difference value, determining that the normally closed fault exists in the exhaust valve.
Here, the first theoretical differential pressure value is a theoretical differential pressure value at the inlet of the ejector before and after the exhaust valve is opened.
If the exhaust valve is opened for 3 times, P corresponds to each exhaust valve opening period diff3 Are all smaller than delta P 1 And if the exhaust valve is not normally opened, determining that the exhaust valve has normally closed faults.
And d4, if a third actual differential pressure value greater than or equal to the first theoretical differential pressure value exists in the plurality of third actual differential pressure values, determining that the exhaust valve is in a normal state.
If P corresponding to at least one exhaust valve opening period occurs in the 3 exhaust valve opening processes diff3 Greater than or equal to DeltaP 1 And if the exhaust valve is indicated to be capable of exhausting normally, determining that the exhaust valve is in a normal state.
When the normally closed fault detection is performed on the exhaust valve, and then the normally closed fault detection is performed on the drain valve, the second opening period is the exhaust valve opening period, and the third opening period is the drain valve opening period. Correspondingly, the second actual pressure difference value is the change of the average pressure value at the inlet of the ejector before and after the exhaust valve is opened, and meanwhile, the second actual pressure difference value is compared with the first theoretical pressure difference value to determine whether the exhaust valve has normally closed faults or not. The third actual pressure difference value is the change of the average pressure value of the inlet of the ejector before and after the drain valve is opened, and meanwhile, the third actual pressure difference value is compared with the second theoretical pressure difference value to determine whether the drain valve has a normally closed fault or not.
In an alternative embodiment, the actual differential pressure value for each on period is determined by: step e1, step e2, step e3.
Step e1, for each opening period, acquiring a plurality of pressure values before opening and a plurality of pressure values after opening corresponding to the opening period.
Here, each pre-opening pressure value is a pressure value at the inlet of the injector in a first preset time interval before the target electromagnetic valve is opened in the opening period, and each post-opening pressure value is a pressure value at the inlet of the injector in a second preset time interval after the target electromagnetic valve is opened in the opening period.
Each of the open periods includes a plurality of first open periods, a plurality of second open periods, and a plurality of third open periods.
Taking a single first opening period of a target electromagnetic valve as an exhaust valve as an example, calculating a plurality of pressure values at the inlet of the ejector in a first preset time interval of 100ms before the exhaust valve is opened according to the opening frequency of the exhaust valve every time the exhaust valve is opened, wherein the pressure values are the pressure values before opening corresponding to the first opening period, and the pressure values before opening corresponding to the first opening period are recorded as: p (P) b1 . Meanwhile, calculating a plurality of pressure values at the inlet of the ejector in a second preset time interval of 200ms after the exhaust valve is opened, wherein the pressure values are the pressure values after opening corresponding to the first opening period, and the pressure values after opening corresponding to the first opening period are recorded as: p (P) a1 . In addition, the pre-opening pressure value corresponding to the second opening period is noted as: p (P) b2 The post-opening pressure value corresponding to the second opening period is noted as: p (P) a2 The pre-opening pressure value corresponding to the third opening period is noted as: p (P) b3 The post-opening pressure value corresponding to the third opening period is noted as: p (P) a3 . The specific duration of the first preset time interval and the second preset time interval can be selected by a person skilled in the art according to actual situations, and the application is not limited herein.
Taking a single first opening period of a target electromagnetic valve as a drain valve as an example, calculating a plurality of pressure values at the inlet of the ejector in a first preset time interval of 100ms before the drain valve is opened according to the opening frequency of the drain valve, for example: and acquiring a pressure value every 10ms within 100ms, wherein 10 pressure values can be acquired in total, and the pressure value is the pressure value before opening corresponding to the first opening period. Meanwhile, calculating a plurality of pressure values at the inlet of the ejector in a second preset time interval of 200ms after the drain valve is opened, wherein the pressure values are the pressure values after opening corresponding to the first opening period.
The calculation methods of the pressure value before opening and the pressure value after opening corresponding to the second opening period and the third opening period are the same as those of the first opening period, but are different in time, and the calculation methods of the pressure value before opening and the pressure value after opening corresponding to the second opening period and the third opening period are not repeated here.
And e2, taking the average value of the plurality of opening front pressure values as a front pressure average value, and taking the average value of the plurality of opening rear pressure values as a rear pressure average value.
Calculating a plurality of P b1 The average value of the first opening period is obtained, and the front pressure average value corresponding to the first opening period is recorded as: p (P) bf1 . Calculating a plurality of P a1 The average value of the first opening period is obtained, the back pressure average value corresponding to the first opening period is obtained, and the front pressure average value is recorded as: p (P) af1 。
Calculating a plurality of P b2 The average value of the second opening period is obtained, and the average value of the front pressure corresponding to the second opening period is recorded as: p (P) bf2 . Calculating a plurality of P a2 The average value of the second opening period is obtained, and the average value of the second opening period is recorded as: p (P) af2 。
Calculating a plurality of P b3 The average value of the pressure corresponding to the third opening period is obtained, and the average value of the pressure corresponding to the third opening period is recorded as: p (P) bf3 . Calculating a plurality of P a3 The average value of the pressure after the third opening period is obtained, and the average value of the pressure after the third opening period is recorded as: p (P) af3 。
And e3, taking the difference value between the front pressure average value and the rear pressure average value as an actual pressure difference value corresponding to the opening period.
The first actual differential pressure value is P diff1 Then there is P diff1 ＝P af1 -P bf1 . The second actual differential pressure value is P diff2 Then there is P diff2 ＝P af2 -P bf2 . The third actual differential pressure value is P diff3 Then there is P diff3 ＝P af3 -P bf3 。
Compared with the electromagnetic valve fault detection method of the fuel cell system in the prior art, the electromagnetic valve fault detection method of the fuel cell system can determine whether the exhaust valve and the drain valve have normally open faults according to the difference value of the actual pressure and the theoretical pressure of the inlet of the ejector, if the exhaust valve and the drain valve have no normally open faults, the drain valve further determines whether the drain valve has normally closed faults according to the liquid level state, and determines whether the exhaust valve has normally closed faults according to the pressure value of the inlet of the ejector, so that electromagnetic valve fault detection is not required to be carried out by utilizing a flowmeter and a hydrogen injection duty ratio, and the problems of low detection accuracy and high detection cost when electromagnetic valve fault detection is carried out are solved.
Based on the same inventive concept, the embodiment of the present application further provides a fuel cell system solenoid valve fault detection device corresponding to the fuel cell system solenoid valve fault detection method, and since the principle of solving the problem of the device in the embodiment of the present application is similar to that of the fuel cell system solenoid valve fault detection method in the embodiment of the present application, the implementation of the device may refer to the implementation of the method, and the repetition is omitted.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a fault detection device for an electromagnetic valve of a fuel cell system according to an embodiment of the present application. As shown in fig. 3, the fuel cell system solenoid valve failure detection device 200 includes:
the numerical comparison module 201 is configured to compare an absolute pressure deviation at a current moment with a set threshold value to obtain a comparison result when the auxiliary hydrogen injection is not in a working state, where the absolute pressure deviation is a difference value between an actual pressure and a theoretical pressure at an inlet of the injector;
the first fault determining module 202 is configured to determine whether both the exhaust valve and the drain valve have normally open faults according to the comparison result;
and the second fault determining module 203 is configured to determine whether the drain valve has a normally closed fault according to a liquid level state indicated by the liquid level sensor if the drain valve and the drain valve have no normally open fault, and determine whether the drain valve has a normally closed fault according to a pressure value change condition at an inlet of the ejector before and after the drain valve is opened.
Referring to fig. 4, fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application. As shown in fig. 4, the electronic device 300 includes a processor 310, a memory 320, and a bus 330.
The memory 320 stores machine-readable instructions executable by the processor 310, when the electronic device 300 is running, the processor 310 communicates with the memory 320 through the bus 330, and when the machine-readable instructions are executed by the processor 310, the steps of the method for detecting a fault of a solenoid valve of a fuel cell system in the method embodiment shown in fig. 1 can be executed, and detailed implementation manners of the method embodiment will not be repeated herein.
The embodiment of the present application further provides a computer readable storage medium, where a computer program is stored on the computer readable storage medium, and when the computer program is executed by a processor, the steps of the method for detecting a fault of a solenoid valve of a fuel cell system in the method embodiment shown in fig. 1 may be executed, and a specific implementation manner may refer to the method embodiment and will not be described herein.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer readable storage medium executable by a processor. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Finally, it should be noted that: the foregoing examples are merely specific embodiments of the present application, and are not intended to limit the scope of the present application, but the present application is not limited thereto, and those skilled in the art will appreciate that while the foregoing examples are described in detail, the present application is not limited thereto. Any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or make equivalent substitutions for some of the technical features within the technical scope of the disclosure of the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A fuel cell system solenoid valve failure detection method, characterized by comprising:
under the condition that auxiliary hydrogen injection is not in a working state, comparing the absolute pressure deviation at the current moment with a set threshold value to obtain a comparison result, wherein the absolute pressure deviation is the difference value between the actual pressure and the theoretical pressure of an inlet of the ejector;
determining whether the normally open faults exist in the exhaust valve and the drain valve according to the comparison result;
if the exhaust valve and the drain valve have no normally open faults, determining whether the drain valve has normally closed faults according to the liquid level state indicated by the liquid level sensor, and determining whether the exhaust valve has normally closed faults according to the pressure value change condition of the inlet of the ejector before and after the exhaust valve is opened.
2. The method of claim 1, wherein the set threshold comprises a first set threshold and a second set threshold, and wherein determining whether both the exhaust valve and the drain valve have a normally open fault based on the comparison result comprises:
if the absolute pressure deviation is larger than or equal to the first set threshold value, determining that normally open faults exist in the exhaust valve and the drain valve;
And if the absolute pressure deviation is smaller than or equal to the second set threshold value, determining that no normally open fault exists in the exhaust valve and the drain valve.
3. The method of claim 2, further comprising, after said comparing the absolute deviation of the pressure at the current time to a set threshold value:
if the absolute pressure deviation is between the first set threshold value and the second set threshold value, selecting continuous target solenoid valve opening periods as a plurality of first opening periods from the new current moment;
for each first opening period, determining a first actual differential pressure value corresponding to the first opening period;
determining whether each first actual pressure difference value is larger than a target theoretical pressure difference value, wherein the target theoretical pressure difference value is a theoretical pressure difference value at the inlet of the ejector before and after the target electromagnetic valve is opened;
and if all the first actual pressure difference values are larger than the target theoretical pressure difference value, determining that the target electromagnetic valve is in a normal state, otherwise, determining that the target electromagnetic valve has a normally open fault.
4. The method of claim 1, wherein the determining whether the drain valve has a normally closed fault based on the level condition indicated by the level sensor comprises:
After the drain valve is started, the liquid level state indicated by the liquid level sensor is obtained;
if the liquid level state is changed from high to low after the drain valve is opened, determining that the drain valve has no normally closed fault;
if the liquid level state is still high after the drain valve is opened, shortening the drain period, and determining whether the drain valve has a normally closed fault according to the liquid level state change after shortening the drain period.
5. The method of claim 4, wherein determining whether the drain valve has a normally closed fault based on a change in a liquid level state after shortening a drain period comprises:
after shortening the drainage period, selecting a continuous new drainage valve opening period as a plurality of second opening periods;
for each second opening period, determining a second actual differential pressure value corresponding to the second opening period;
if the liquid level state is changed from high to low in the second opening periods, determining that the drain valve is in a normal state;
if the liquid level state does not become low and each second actual pressure difference value is smaller than a second theoretical pressure difference value in the second opening periods, determining that a normally closed fault exists in the drain valve, wherein the second theoretical pressure difference value is a theoretical pressure difference value at an inlet of the ejector before and after the drain valve is opened;
And if the liquid level state does not become low in the second opening periods and a second actual differential pressure value which is larger than or equal to the second theoretical differential pressure value exists in the second actual differential pressure values, determining that the normally closed fault does not exist in the drain valve, and the fault exists in the liquid level sensor.
6. The method according to claim 1, wherein determining whether the vent valve has a normally closed fault according to pressure value changes at the inlet of the ejector before and after the vent valve is opened comprises:
from the latest current moment, selecting a continuous new exhaust valve opening period as a plurality of third opening periods;
for each third opening period, determining a third actual differential pressure value corresponding to the third opening period;
if the plurality of third actual pressure difference values are smaller than the first theoretical pressure difference value, determining that the exhaust valve has a normally closed fault, wherein the first theoretical pressure difference value is a theoretical pressure difference value at the inlet of the ejector before and after the exhaust valve is opened;
and if a third actual differential pressure value which is greater than or equal to the first theoretical differential pressure value exists in the plurality of third actual differential pressure values, determining that the exhaust valve is in a normal state.
7. A method according to claim 3 or 5 or 6, characterized in that the actual differential pressure value for each on-period is determined by:
For each opening period, acquiring a plurality of pre-opening pressure values and a plurality of post-opening pressure values corresponding to the opening period, wherein each pre-opening pressure value is a pressure value at an inlet of the injector in a first preset time interval before the target electromagnetic valve is opened in the opening period, and each post-opening pressure value is a pressure value at an inlet of the injector in a second preset time interval after the target electromagnetic valve is opened in the opening period;
taking the average value of the plurality of opening front pressure values as a front pressure average value, and taking the average value of the plurality of opening rear pressure values as a rear pressure average value;
and taking the difference value between the front pressure average value and the rear pressure average value as an actual pressure difference value corresponding to the opening period.
8. A fuel cell system solenoid valve failure detection apparatus, comprising:
the numerical comparison module is used for comparing the absolute pressure deviation at the current moment with a set threshold value under the condition that the auxiliary hydrogen injection is not in a working state, and obtaining a comparison result, wherein the absolute pressure deviation is the difference value between the actual pressure and the theoretical pressure of the inlet of the ejector;
the first fault determining module is used for determining whether normally open faults exist in the exhaust valve and the drain valve according to the comparison result;
And the second fault determining module is used for determining whether the normally closed fault exists in the drain valve according to the liquid level state indicated by the liquid level sensor and determining whether the normally closed fault exists in the drain valve according to the pressure value change condition of the inlet of the ejector before and after the vent valve is opened.
9. An electronic device, comprising: a processor, a storage medium and a bus, the storage medium storing machine-readable instructions executable by the processor, the processor and the storage medium communicating over the bus when the electronic device is operating, the processor executing the machine-readable instructions to perform the steps of the fuel cell system solenoid valve fault detection method of any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, performs the steps of the fuel cell system electromagnetic valve failure detection method according to any one of claims 1 to 7.
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| CN202311329974.XA CN117367781A (en) | 2023-10-13 | 2023-10-13 | Fuel cell system electromagnetic valve fault detection method and device and electronic equipment |
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| CN202311329974.XA CN117367781A (en) | 2023-10-13 | 2023-10-13 | Fuel cell system electromagnetic valve fault detection method and device and electronic equipment |
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