Hydrogen storage system pressure fault detection method and device and fuel cell system

Abstract

The invention provides a hydrogen storage system pressure fault detection method, a hydrogen storage system pressure fault detection device and a fuel cell system, and relates to the field of fuel cell hydrogen storage control. Therefore, misjudgment caused by temporary insufficiency of hydrogen supply pressure due to maintenance of the pipeline of the hydrogen storage system is avoided, and the use experience of a user is improved.

Description

Technical Field

[0001] The present invention relates to the field of fuel cell hydrogen storage control, and particularly to a method and device for detecting pressure faults in a hydrogen storage system and a fuel cell system. Background Art

[0002] A fuel cell system is an energy conversion system that uses a fuel cell stack to convert chemical energy into electrical energy. The raw material of the fuel cell stack is hydrogen, and this hydrogen is stored in the form of liquefied hydrogen through a related hydrogen storage system. When the fuel cell stack generates electricity, the hydrogen storage system converts high-pressure hydrogen into hydrogen at a pressure that can be used by the fuel cell stack to meet the power generation requirements.

[0003] In an actual scenario, when repairing and replacing related components in the hydrogen storage system, it is necessary to release the gas in its pipeline before specific implementation can be carried out. After the repair and replacement are completed, the pipeline pressure is equivalent to the normal atmospheric pressure, which is much lower than the hydrogen supply pressure required by the fuel cell stack. Therefore, after the fuel cell system is started, a fault code will appear due to insufficient hydrogen supply pressure, affecting the pressure boost process of the fuel cell stack. In severe cases, it will also affect the power generation process of the fuel cell stack, affecting the user experience. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a method and device for detecting pressure faults in a hydrogen storage system and a fuel cell system. This solution comprehensively judges faults when the hydrogen supply pressure is low by using two pressure values before and after the pressure reducing valve in the hydrogen storage system, thereby avoiding misjudgment caused by temporarily insufficient hydrogen supply pressure in the pipeline of the hydrogen storage system due to maintenance reasons, and thus improving the user experience.

[0005] In a first aspect, an embodiment of the present invention provides a method for detecting pressure faults in a hydrogen storage system. The hydrogen storage system is provided with a hydrogen storage cylinder and a pressure reducing valve; the hydrogen storage system is used to supply hydrogen to a fuel cell stack; a high-pressure sensor is arranged between the hydrogen storage cylinder and the intake port of the pressure reducing valve; a medium-pressure sensor is arranged at the outlet of the pressure reducing valve;

[0006] The method includes:

[0007] [[ID=2,5]]Obtain the medium-pressure and high-pressure pressures collected by the medium-pressure sensor and the high-pressure sensor respectively;

[0008] When it is detected that the medium-pressure is less than a preset first pressure threshold, determine whether the high-pressure is less than a preset second pressure threshold;

[0009] If the high-pressure is less than the second pressure threshold, control the hydrogen storage cylinder to open for a preset duration, then obtain the updated medium-pressure and high-pressure pressures, and determine whether the updated medium-pressure is less than the first pressure threshold;

[0010] If so, generate a first fault code.

[0011] In one embodiment, if the high-pressure pressure is not less than the second pressure threshold, the method further includes:

[0012] Generating a first fault code.

[0013] In one embodiment, after controlling the hydrogen storage cylinder to open for a preset duration, the method further includes:

[0014] Accumulating the number of self-checks in a preset counter by a preset step size.

[0015] In one embodiment, after the step of accumulating the number of self-checks in a preset counter by a preset step size, the method further includes:

[0016] Determining whether the accumulated number of self-checks exceeds a preset quantity threshold;

[0017] If so, generating a second fault code.

[0018] In one embodiment, after the step of obtaining the medium-pressure and high-pressure pressures collected by the medium-pressure sensor and the high-pressure sensor, the method further includes:

[0019] Determining whether the hydrogen storage system contains the first fault code and the second fault code;

[0020] If the hydrogen storage system does not contain the first fault code and the second fault code, controlling the counter to perform initialization and clearing the number of self-checks.

[0021] In one embodiment, after controlling the counter to perform initialization and clearing the number of self-checks, the method further includes:

[0022] When it is detected that the medium-pressure is less than a preset first pressure threshold, accumulating the number of self-checks in the initialized counter by a preset step size.

[0023] In one embodiment, before controlling the hydrogen storage cylinder to open for a preset duration, the method further includes:

[0024] Determining whether the number of self-checks exceeds the quantity threshold;

[0025] If so, generating a first fault code; if not, controlling the hydrogen storage cylinder to open for a preset time.

[0026] In one embodiment, after generating the first fault code, the method further includes:

[0027] Stopping the pressure fault detection process of the hydrogen storage system.

[0028] In a second aspect, an embodiment of the present invention further provides a pressure fault detection device for a hydrogen storage system. The hydrogen storage system is provided with a hydrogen storage cylinder and a pressure reducing valve, and the hydrogen storage system is used to supply hydrogen to a fuel cell stack. A medium-pressure sensor is arranged between the hydrogen storage cylinder and the inlet of the pressure reducing valve; a high-pressure sensor is arranged at the outlet of the pressure reducing valve;

[0029] The device includes:

[0030] A data acquisition module, configured to acquire the medium-pressure and high-pressure measured by the medium-pressure sensor and the high-pressure sensor respectively;

[0031] A first detection module, configured to determine whether the high-pressure is less than a preset second pressure threshold when it is detected that the medium-pressure is less than a preset first pressure threshold;

[0032] A second detection module, configured to, if the high-pressure is less than the second pressure threshold, control the hydrogen storage cylinder to open for a preset duration, then acquire the updated medium-pressure and high-pressure, and determine whether the updated medium-pressure is less than the first pressure threshold;

[0033] A result generation module, if so, generates a first fault code.

[0034] In a third aspect, an embodiment of the present invention further provides a fuel cell system, which includes a hydrogen storage system and a fuel cell stack. During the process of supplying hydrogen to the fuel cell stack by the hydrogen storage system, the above-mentioned hydrogen storage system pressure fault detection method in the first aspect is used to handle faults during the hydrogen supply process.

[0035] In a fourth aspect, an embodiment of the present invention further provides an electronic device, including a processor and a memory. The memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the steps of the hydrogen storage system pressure fault detection method provided in the first aspect.

[0036] In a fifth aspect, an embodiment of the present invention further provides a storage medium, which stores computer executable instructions. When the computer executable instructions are called and executed by a processor, the computer executable instructions cause the processor to implement the steps of the hydrogen storage system pressure fault detection method provided in the first aspect.

[0037] A method and device for detecting pressure faults in a hydrogen storage system and a fuel cell system according to an embodiment of the present invention. The hydrogen storage system is provided with a hydrogen storage cylinder and a pressure reducing valve; the hydrogen storage system is used to supply hydrogen to the fuel cell stack; a medium-pressure sensor is arranged between the hydrogen storage cylinder and the inlet of the pressure reducing valve; a high-pressure sensor is arranged at the outlet of the pressure reducing valve. During the process of detecting pressure faults in the above hydrogen storage system, first, obtain the medium-pressure and high-pressure pressures collected by the medium-pressure sensor and the high-pressure sensor respectively; when it is detected that the medium-pressure is less than a preset first pressure threshold, determine whether the high-pressure is less than a preset second pressure threshold; if the high-pressure value is less than the second pressure threshold, control the hydrogen storage cylinder to open for a preset duration, then obtain the updated medium-pressure and high-pressure pressures, and determine whether the updated medium-pressure is less than the first pressure threshold; if so, generate a first fault code. This solution uses the two pressure values before and after the pressure reducing valve in the hydrogen storage system to comprehensively judge faults when the hydrogen supply pressure is relatively low, thereby avoiding misjudgment caused by temporarily insufficient hydrogen supply pressure due to maintenance reasons in the pipeline of the hydrogen storage system, and thus improving the user experience.

[0038] Other features and advantages of the present invention will be described in the following description, and in part will be obvious from the description, or will be understood by implementing the present invention. The objectives and other advantages of the present invention are achieved and obtained by the specific structures particularly pointed out in the description, the claims, and the drawings.

[0039] To make the above objectives, features, and advantages of the present invention more obvious and understandable, the following specifically provides preferred embodiments and, in conjunction with the accompanying drawings, the detailed description is as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0041] Figure 1 It is a flowchart of the first method for detecting pressure faults in a hydrogen storage system provided by an embodiment of the present invention;

[0042] Figure 2 It is a flowchart of the second method for detecting pressure faults in a hydrogen storage system provided by an embodiment of the present invention;

[0043] Figure 3 It is a flowchart of the third method for detecting pressure faults in a hydrogen storage system provided by an embodiment of the present invention;

[0044] Figure 4Flowchart of the fourth hydrogen storage system pressure fault detection method provided by an embodiment of the present invention;

[0045] Figure 5 Flowchart after the step of obtaining the first pressure value collected by the first pressure sensor and the second pressure value collected by the second pressure sensor provided by an embodiment of the present invention;

[0046] Figure 6 Flowchart of the fifth hydrogen storage system pressure fault detection method provided by an embodiment of the present invention;

[0047] Figure 7 Flowchart of the hydrogen storage system pressure fault detection process in the prior art provided by an embodiment of the present invention;

[0048] Figure 8 Flowchart of the sixth hydrogen storage system pressure fault detection method provided by an embodiment of the present invention;

[0049] Figure 9 Schematic structural diagram of a hydrogen storage system pressure fault detection device provided by an embodiment of the present invention;

[0050] Figure 10 Schematic structural diagram of an electronic device provided by an embodiment of the present invention.

[0051] Icon:

[0052] 910 - Data acquisition module; 920 - First detection module; 930 - Second detection module; 940 - Result generation module;

[0053] 101 - Processor; 102 - Memory; 103 - Bus; 104 - Communication interface. Detailed implementation manners

[0054] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0055] A fuel cell system is an energy conversion system that uses a fuel cell stack for energy conversion and converts chemical energy into electrical energy. The raw material of the fuel cell stack is hydrogen, and this hydrogen is stored in the form of liquefied hydrogen through a related hydrogen storage system. When the fuel cell stack generates electricity, the hydrogen storage system converts high-pressure hydrogen into hydrogen at a pressure available to the fuel cell stack, thereby meeting the power generation requirements.

[0056] In an actual scenario, when performing maintenance and replacement on relevant components in a hydrogen storage system, it is necessary to release the gas in its pipeline before specific implementation can be carried out. After the maintenance and replacement are completed, the pipeline pressure is equivalent to the normal atmospheric pressure, which is much lower than the hydrogen supply pressure required by the fuel cell stack. Therefore, after the fuel cell system is started, a fault code will appear due to insufficient hydrogen supply pressure value, and in severe cases, it will also affect the power generation process of the fuel cell stack and the user experience. Based on this, the present invention provides a method, device, and fuel cell system for detecting pressure faults in a hydrogen storage system, which comprehensively judge faults when the hydrogen supply pressure is low by using two pressure values before and after the pressure reducing valve in the hydrogen storage system, so as to avoid misjudgment caused by temporarily insufficient hydrogen supply pressure in the pipeline of the hydrogen storage system due to maintenance reasons, thereby improving the user experience.

[0057] To facilitate the understanding of this embodiment, first, a method for detecting pressure faults in a hydrogen storage system disclosed in the embodiments of the present invention will be introduced in detail. In the hydrogen storage system to which this method is applied, there are a hydrogen storage cylinder and a pressure reducing valve; this hydrogen storage system is used to supply hydrogen to the fuel cell stack; the hydrogen storage cylinder is connected to the intake port of the pressure reducing valve through a first pipeline; a second pipeline is provided at the outlet of the pressure reducing valve; a high-pressure sensor is provided in the first pipeline, and a medium-pressure sensor is provided in the second pipeline. On this basis, this method is as Figure 1 shown, including:

[0058] Step S101, obtain the medium-pressure and high-pressure pressures collected by the medium-pressure sensor and the high-pressure sensor respectively;

[0059] Step S102, when it is detected that the medium-pressure is less than a preset first pressure threshold, judge whether the high-pressure is less than a preset second pressure threshold;

[0060] Step S103, if the high-pressure value is less than the second pressure threshold, control the hydrogen storage cylinder to open for a preset duration, then obtain the updated medium-pressure and high-pressure pressures, and judge whether the updated medium-pressure is less than the first pressure threshold;

[0061] Step S104, if so, generate a first fault code.

[0062] Specifically, the high-pressure pressure collected by the high-pressure sensor is the pipeline pressure between the hydrogen storage cylinder and the pressure reducing valve. The pressure of hydrogen is relatively high and belongs to high-pressure hydrogen. The medium-pressure pressure collected by the medium-pressure sensor is the pipeline pressure after passing through the pressure reducing valve. After pressure reduction treatment, the pressure of hydrogen is relatively low, and the hydrogen pressure is within the normal pressure range.

[0063] This solution first uses the medium pressure to determine the pipeline pressure after the pressure reducing valve. When it is detected that the medium pressure is less than the preset first pressure threshold, it indicates that the pressure is too low. At this time, the high pressure is used to determine the pipeline pressure between the hydrogen storage cylinder and the pressure reducing valve. Since only the medium pressure is usually used to determine the pipeline pressure after the pressure reducing valve in the prior art, this solution adds a pressure judgment condition for the high-pressure pipeline on the basis of the medium pressure.

[0064] In the specific implementation process, if the medium pressure is less than the first pressure threshold, it is initially determined that there is no hydrogen in the first pipeline. This may be caused by the repair and replacement of relevant components in the hydrogen storage system, or it may be due to pipeline leakage. At this time, the hydrogen storage cylinder is controlled to open according to the preset time, so as to supplement hydrogen into the first pipeline, and these hydrogen then enter the second pipeline after passing through the pressure reducing valve. If there is no leakage, the high pressure collected by the high-pressure sensor and the medium pressure collected by the medium-pressure sensor will increase; if there is leakage, the high pressure and the medium pressure will remain unchanged or even decrease. Therefore, after the hydrogen cylinder is opened according to the preset duration, the medium pressure and the high pressure are updated, and it is judged whether the updated medium pressure is less than the first pressure threshold. If so, it indicates that there is a leakage in the pipeline, and the first fault code corresponding to the first pipeline and the second pipeline is generated. The first fault code can characterize the leakage in the above pipeline, so as to determine the fault monitoring result of the hydrogen storage system based on the first fault code.

[0065] In the actual scenario, if the updated medium pressure is not less than the first pressure threshold, it indicates that the phenomenon of initially judging that there is no hydrogen in the first pipeline is caused by the repair and replacement of relevant components in the hydrogen storage system. After supplementing hydrogen into the first pipeline, it is found that the medium pressure is not less than the first pressure threshold. At this time, no fault code is generated, thus reducing the misjudgment probability.

[0066] In one implementation, if the high pressure is not less than the second pressure threshold, the method further includes: generating a first fault code, and determining the fault monitoring result corresponding to the hydrogen storage system based on the first fault code.

[0067] At this time, the pressure fault detection method of the hydrogen storage system is as Figure 2 shown, including:

[0068] Step S201, obtaining the medium pressure collected by the medium-pressure sensor and the high pressure collected by the high-pressure sensor;

[0069] Step S202, when it is detected that the medium pressure is less than the preset first pressure threshold, judging whether the high pressure is less than the preset second pressure threshold;

[0070] Step S203, if the high pressure is not less than the second pressure threshold, generating a first fault code.

[0071] During the above process, the high-pressure pressure not less than the second pressure threshold indicates that the first pipeline is normal. At this time, the medium-pressure pressure is less than the preset first pressure threshold, which indicates that the pressure value of the second pipeline is small. Therefore, it can be determined that there is a leak in the second pipeline, thereby generating a first fault code corresponding to the first pipeline and the second pipeline, and determining the fault monitoring result of the hydrogen storage system based on the first fault code.

[0072] In one embodiment, after controlling the hydrogen storage cylinder to open according to a preset time, the method further includes: accumulating the number of self-checks in a preset counter according to a preset step size. At this time, the pressure fault detection method of the hydrogen storage system is as Figure 3 shown, including:

[0073] Step S301, obtaining the medium-pressure and high-pressure pressures collected by the medium-pressure sensor and the high-pressure sensor;

[0074] Step S302, when it is detected that the medium-pressure pressure is less than the preset first pressure threshold, determining whether the high-pressure pressure is less than the preset second pressure threshold;

[0075] Step S303, if the high-pressure pressure is less than the second pressure threshold, then control the hydrogen storage cylinder to open according to a preset duration, and accumulate the number of self-checks in a preset counter according to a preset step size;

[0076] Step S304, obtaining the updated medium-pressure and high-pressure pressures, and determining whether the updated medium-pressure pressure is less than the first pressure threshold;

[0077] Step S305, if so, generate a first fault code.

[0078] In an actual scenario, the process of determining the magnitude relationship between the medium-pressure pressure and the first pressure threshold can be understood as the self-check process of the hydrogen storage system. During the execution of the fault detection process, a self-check is first performed. When the high-pressure pressure is less than the second pressure threshold, the hydrogen storage cylinder is controlled to open according to a preset time, and hydrogen is replenished into the first pipeline and then the self-check process is performed again. In order to control the number of self-check processes, in this embodiment, it is implemented through a counter. After controlling the hydrogen storage cylinder to open according to a preset time, the number of self-checks in the counter is accumulated according to a preset step size.

[0079] In one embodiment, after the step of accumulating the number of self-checks in a preset counter according to a preset step size, the method further includes: determining whether the accumulated number of self-checks exceeds a preset quantity threshold; if so, generate a second fault code. At this time, the pressure fault detection method of the hydrogen storage system is as Figure 4 shown, including:

[0080] Step S401, obtain the medium pressure collected by the medium pressure sensor and the high pressure collected by the high pressure sensor;

[0081] Step S402, when it is detected that the medium pressure is less than a preset first pressure threshold, determine whether the high pressure is less than a preset second pressure threshold;

[0082] Step S403, if the high pressure is less than the second pressure threshold, control the hydrogen storage cylinder to open for a preset duration, and then increment the self-check times in a preset counter by a preset step;

[0083] Step S404, determine whether the accumulated self-check times exceed a preset quantity threshold; if so, generate a second fault code.

[0084] The self-check times can be used as a basis for fault monitoring. Since the self-check times are the result of accumulation, when the accumulated self-check times exceed the preset quantity threshold, it indicates that there is still a situation where the pressure value is less than the preset pressure threshold after multiple self-checks. At this time, it can be determined that there is a leak in the pressure reducing valve. This leak is generally a minor leak, which causes the medium pressure to decrease after a long time of standing. Therefore, when the accumulated self-check times exceed the preset quantity threshold, a second fault code corresponding to the pressure reducing valve is generated, indicating that there is a leak in the pressure reducing valve or a leak in the second pipeline behind the pressure reducing valve.

[0085] In one implementation, after the step of obtaining the medium pressure collected by the medium pressure sensor and the high pressure collected by the high pressure sensor, as Figure 5 shown, the method further includes:

[0086] Step S501, determine whether the hydrogen storage system contains a first fault code and a second fault code;

[0087] Step S502, if the hydrogen storage system does not contain the first fault code and the second fault code, control the counter to perform initialization and clear the self-check times.

[0088] The process of obtaining the first pressure value and the second pressure value can also be understood as being completed during the self-check process. At this time, during the self-check process, it is also possible to handle whether the hydrogen storage system contains the first fault code and the second fault code, so that after the counter is initialized, the self-check times are cleared for subsequent accumulation of the self-check times. In one embodiment, after controlling the counter to be initialized and clearing the self-check times, the method further includes: when it is detected that the medium pressure is less than a preset first pressure threshold, accumulating the self-check times in the initialized counter by a preset step size. After the accumulation of the self-check times at this time, when the high pressure is less than the second pressure threshold, the hydrogen storage cylinder is controlled to be opened for a preset duration, and the self-check times are accumulated again by a preset step size. If the accumulated self-check times exceed a preset quantity threshold, a second fault code is generated.

[0089] In one embodiment, before controlling the hydrogen storage cylinder to be opened for a preset time, the method further includes: determining whether the self-check times exceed the quantity threshold; if so, generating a first fault code; if not, controlling the hydrogen storage cylinder to be opened for a preset time. At this time, the pressure fault detection method of the hydrogen storage system is as Figure 6 shown, including:

[0090] Step S601, obtaining the medium pressure collected by the medium pressure sensor and the high pressure collected by the high pressure sensor;

[0091] Step S602, when it is detected that the medium pressure is less than a preset first pressure threshold, determining whether the high pressure is less than a preset second pressure threshold;

[0092] Step S603, determining whether the self-check times exceed the quantity threshold;

[0093] Step S604, if so, generating a first fault code; if not, after controlling the hydrogen storage cylinder to be opened for a preset time, obtaining the updated medium pressure and high pressure, and determining whether the updated medium pressure is less than the first pressure threshold;

[0094] Step S605, if so, generating a first fault code.

[0095] In the process of determination using the self-check times of the counter, it can be set after the step of determining that the high-pressure pressure value is less than the second pressure threshold. Specifically, after obtaining the medium-pressure pressure collected by the medium-pressure sensor and the high-pressure pressure collected by the high-pressure sensor, the self-check process is executed. When it is detected that the medium-pressure pressure is less than the preset first pressure threshold, it is determined whether the high-pressure pressure is less than the preset second pressure threshold. Subsequently, it is determined whether the current self-check times of the counter exceed the quantity threshold; if so, it indicates that the same situation of relatively low pressure has occurred continuously, and at this time, the first fault code is generated for the first pipeline and the second pipeline; if not, after controlling the hydrogen storage bottle to open according to the preset time, the updated medium-pressure pressure and high-pressure pressure are obtained, and it is determined whether the updated medium-pressure pressure is less than the first pressure threshold.

[0096] In one implementation, after generating the first fault code, the method further includes: stopping the pressure fault detection process of the hydrogen storage system, and the counter can also be initialized. Similarly, after determining the fault monitoring result of the hydrogen storage system based on the second fault code, the counter can also be initialized to zero the counter.

[0097] Specifically, as Figure 7 shown in the flowchart of the pressure fault detection process of the hydrogen storage system in the prior art, generally speaking, the hydrogen storage system is composed of a hydrogen storage bottle, a bottle valve, a high-pressure pipeline (the pipeline between the hydrogen storage bottle and the pressure reducing valve), a pressure reducing valve, a medium-pressure pipeline (the pipeline after the pressure reducing valve), a hydrogen storage controller, an infrared controller, etc. The electromagnetic valve in the bottle valve is an important component for controlling the release of hydrogen.

[0098] The current mainstream working mode of the hydrogen storage bottle is that the high-pressure hydrogen discharged from the bottle valve is reduced to the pressure suitable for the fuel cell stack after passing through the pressure reducing valve to meet the normal operation of the fuel cell stack. However, if the pressure reducing valve or the medium-pressure sensor fails and needs to be deflated for replacement and repair, after the repair is completed, because there is no hydrogen in the pressure reducing valve to maintain the normal operation of the power stack, the pressure in the pipeline is the normal atmospheric pressure, which is much lower than the normal pressure. When the fuel cell system starts to power on and executes the self-check process, the medium-pressure pressure will report a fault of low medium-pressure pressure because no pressure is detected, and ultimately the power stack cannot be pressurized, affecting the user experience.

[0099] And as Figure 8As can be seen from the overall flowchart of the hydrogen storage system pressure fault detection method shown, this method adds a pressure judgment condition. When the medium-pressure is lower than the threshold, instead of directly reporting the medium-pressure low fault, a judgment of the high-pressure is carried out once. If the high-pressure is much lower than the pressure when the hydrogen is exhausted (only unavailable hydrogen and scavenging gas in the pipeline), it is initially judged that there is no hydrogen in the pipeline (in the case of no hydrogen leakage, if there is hydrogen leakage, the hydrogen leakage fault will be directly reported and this set of self-check procedures will not be carried out). Then, the hydrogen cylinder valve is briefly opened to supplement hydrogen to the hydrogen pipeline, and then self-check is carried out again. If the medium-pressure is still lower than the threshold after this self-check, the medium-pressure low fault is reported. If the pressure returns to the normal range of the medium-pressure, no fault is reported, reducing the risk of false alarms.

[0100] If there is a slight leakage in the pressure reducing valve, the long-term static state will cause the high-pressure hydrogen in the pipeline to leak, resulting in the loss of the high-pressure environment in the pipeline. Being in a slight leakage state for a long time is likely to pose a safety hazard to the whole vehicle. By adding a counter, when both the medium-pressure and the high-pressure are lower than the threshold, when self-check is carried out again, the counter will be incremented synchronously. If the same situation occurs twice in a row, it is judged that there is a slight leakage in the pressure reducing valve or at the back end of the pressure reducing valve.

[0101] In addition, after the hydrogen storage system is powered on, the number of self-checks will be recorded synchronously. When the number of self-checks exceeds two after one power-on, when the medium-pressure low fault occurs, the fault will be directly reported and no repeated self-check will be carried out. After the hydrogen storage system is powered off, the number of self-checks returns to zero. When continuous self-check occurs, a signal will be sent to the counter synchronously. When the count of the counter exceeds 2, the slight leakage fault of the hydrogen storage system will be triggered. After the hydrogen storage system is powered on and self-check is fault-free, the counter returns to zero.

[0102] It can be seen that the above-mentioned hydrogen storage system pressure fault detection method provided by the embodiments of the present invention can comprehensively judge the fault when the hydrogen supply pressure is low by using the two pressure values before and after the pressure reducing valve in the hydrogen storage system, so as to avoid misjudgment caused by the temporarily insufficient hydrogen supply pressure due to maintenance reasons in the pipeline of the hydrogen storage system, thereby improving the user experience.

[0103] Corresponding to the hydrogen storage system pressure fault detection method provided in the foregoing embodiments, an embodiment of the present invention provides a hydrogen storage system pressure fault detection device. The hydrogen storage system is provided with a hydrogen storage cylinder and a pressure reducing valve; the hydrogen storage system is used to supply hydrogen to the fuel cell stack; a medium-pressure sensor is arranged between the hydrogen storage cylinder and the intake port of the pressure reducing valve; a high-pressure sensor is arranged at the outlet of the pressure reducing valve;

[0104] The hydrogen storage system pressure fault detection device is as Figure 9 shown and includes:

[0105] A data acquisition module 910 is configured to obtain the medium pressure collected by a medium-pressure sensor and the high pressure collected by a high-pressure sensor.

[0106] A first detection module 920 is configured to determine whether the high pressure is less than a preset second pressure threshold when it is detected that the medium pressure is less than a preset first pressure threshold.

[0107] A second detection module 930 is configured to, if the high pressure is less than the second pressure threshold, control the hydrogen storage cylinder to open for a preset duration, then obtain the updated medium pressure and high pressure, and determine whether the updated medium pressure is less than the first pressure threshold.

[0108] A result generation module 940, if so, generates a first fault code.

[0109] The hydrogen storage system pressure fault detection device provided by the embodiment of the present invention can comprehensively judge the fault when the hydrogen supply pressure is low by using two pressure values before and after the pressure reducing valve in the hydrogen storage system, so as to avoid misjudgment caused by the temporary insufficient hydrogen supply pressure due to maintenance reasons in the pipeline of the hydrogen storage system, thereby improving the user experience.

[0110] The implementation principle and the technical effects generated by the hydrogen storage system pressure fault detection device provided by the embodiment of the present invention are the same as those of the foregoing embodiment of the hydrogen storage system pressure fault detection method. For the sake of brief description, for the parts not mentioned in the device embodiment, reference may be made to the corresponding content in the foregoing embodiment of the hydrogen storage system pressure fault detection method.

[0111] This embodiment also provides a fuel cell system, which includes a hydrogen storage system and a fuel cell stack; during the process of supplying hydrogen from the hydrogen storage system to the fuel cell stack, the hydrogen storage system pressure fault detection method mentioned in the foregoing embodiment is used to process the faults during the hydrogen supply process.

[0112] This embodiment also provides an electronic device, and the structural schematic diagram of the electronic device is as Figure 10 shown. The device includes a processor 101 and a memory 102; wherein, the memory 102 is used to store one or more computer instructions, and the one or more computer instructions are executed by the processor to implement the steps of the foregoing hydrogen storage system pressure fault detection method.

[0113] Figure 10 The electronic device shown also includes a bus 103 and a communication interface 104, and the processor 101, the communication interface 104 and the memory 102 are connected through the bus 103.

[0114] Among them, the memory 102 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk memory. The bus 103 may be an ISA bus, a PCI bus, an EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, Figure 10 only a bidirectional arrow is used in Figure 10 , but it does not mean that there is only one bus or one type of bus.

[0115] The communication interface 104 is used to connect to at least one user terminal and other network units through a network interface, and send the encapsulated IPv4 packet or IPv4 packet to the user terminal through the network interface.

[0116] The processor 101 may be an integrated circuit chip with signal processing capabilities. In the implementation process, the steps of the above method can be completed by the integrated logic circuit in the hardware of the processor 101 or the instructions in the form of software. The above-mentioned processor 101 may be a general-purpose processor, including a central processing unit (CPU for short), a network processor (NP for short), etc.; it may also be a digital signal processor (DSP for short), an application specific integrated circuit (ASIC for short), a field programmable gate array (FPGA for short), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present disclosure. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present disclosure can be directly embodied as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module may be located in a mature storage medium in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. This storage medium is located in the memory 102, and the processor 101 reads the information in the memory 102 and combines its hardware to complete the steps of the method in the foregoing embodiments.

[0117] The embodiment of the present invention also provides a storage medium, on which a computer program is stored, and when the computer program is run by a processor, it executes the steps of the hydrogen storage system pressure fault detection method in the foregoing embodiments.

[0118] In several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For another example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some communication interfaces. The indirect coupling or communication connection of devices or units can be in electrical, mechanical, or other forms.

[0119] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0120] In addition, in each embodiment of the present invention, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0121] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0122] Finally, it should be noted that the above-described embodiments are only specific embodiments of the present invention, used to illustrate the technical solutions of the present invention, rather than limiting it. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that any person skilled in the art within the technical scope disclosed by the present invention can still modify the technical solutions recorded in the foregoing embodiments or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for detecting pressure faults in a hydrogen storage system, characterized in that, The hydrogen storage system is provided with a hydrogen storage cylinder and a pressure reducing valve, and the hydrogen storage system is used to supply hydrogen to the fuel cell stack; a high-pressure sensor is arranged between the hydrogen storage cylinder and the intake port of the pressure reducing valve; a medium-pressure sensor is arranged at the outlet of the pressure reducing valve; The method includes: Obtaining the medium-pressure collected by the medium-pressure sensor and the high-pressure collected by the high-pressure sensor; When it is detected that the medium-pressure is less than a preset first pressure threshold, determining whether the high-pressure is less than a preset second pressure threshold; If the high-pressure is less than the second pressure threshold, controlling the hydrogen storage cylinder to open for a preset duration, then obtaining the updated medium-pressure and the high-pressure, and determining whether the updated medium-pressure is less than the first pressure threshold; If so, generating a first fault code.

2. The method for detecting a pressure fault of a hydrogen storage system according to claim 1, wherein If the high-pressure is not less than the second pressure threshold, the method further includes: Generating the first fault code.

3. The method for detecting a pressure fault of a hydrogen storage system according to claim 2, characterized in that, After controlling the hydrogen storage cylinder to open for a preset duration, the method further includes: Accumulating the self-check times in a preset counter by a preset step length.

4. The method for detecting a pressure fault of a hydrogen storage system according to claim 3, characterized in that, After the step of accumulating the self-check times in the preset counter by the preset step length, the method further includes: Determining whether the accumulated self-check times exceed a preset quantity threshold; If so, generating a second fault code.

5. The method for detecting the pressure fault of the hydrogen storage system according to claim 4, wherein, After the step of obtaining the medium-pressure collected by the medium-pressure sensor and the high-pressure collected by the high-pressure sensor, the method further includes: Determining whether the first fault code and the second fault code are included in the hydrogen storage system; If the first fault code and the second fault code are not included in the hydrogen storage system, controlling the counter to perform initialization and clearing the self-check times.

6. The method for detecting the pressure fault of the hydrogen storage system according to claim 5, wherein, After controlling the counter to perform initialization and clearing the self-check times, the method further includes: When it is detected that the medium-pressure is less than the preset first pressure threshold, accumulating the self-check times in the initialized counter by the preset step length.

7. The method for detecting the pressure fault of the hydrogen storage system according to claim 4, characterized in that, Before controlling the hydrogen storage cylinder to open for a preset duration, the method further includes: Determining whether the self-check times exceed the quantity threshold; If so, generating the first fault code; if not, controlling the hydrogen storage cylinder to open for a preset time.

8. The method for detecting the pressure fault of the hydrogen storage system according to claim 7, wherein, After generating the first fault code, the method further includes: Stopping the pressure fault detection process of the hydrogen storage system.

9. A pressure fault detection device for a hydrogen storage system, characterized in that, The hydrogen storage system is provided with a hydrogen storage cylinder and a pressure reducing valve, and the hydrogen storage system is used to supply hydrogen to the fuel cell stack; a high-pressure sensor is arranged between the hydrogen storage cylinder and the intake port of the pressure reducing valve; a medium-pressure sensor is arranged at the outlet of the pressure reducing valve; The device includes: A data acquisition module for obtaining the medium-pressure collected by the medium-pressure sensor and the high-pressure collected by the high-pressure sensor; A first detection module for determining whether the high-pressure is less than a preset second pressure threshold when it is detected that the medium-pressure is less than a preset first pressure threshold; A second detection module, configured to, if the high-pressure pressure is less than the second pressure threshold, control the hydrogen storage cylinder to open for a preset duration, then obtain the updated medium-pressure pressure and the high-pressure pressure, and determine whether the updated medium-pressure pressure is less than the first pressure threshold; A result generation module, if so, generates a first fault code.

10. A fuel cell system, characterized in that, The fuel cell system includes a hydrogen storage system and a fuel cell stack; during the process of supplying gas to the fuel cell stack by the hydrogen storage system, the method for detecting a fault in the pressure of the hydrogen storage system according to any one of claims 1 to 8 above is used to handle faults during the gas supply process.

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