Hydrogen fuel cell vehicle hydrogen storage pressure diagnosis method and device, electronic equipment and medium

Abstract

The application provides a hydrogen fuel cell vehicle hydrogen storage pressure diagnosis method and device, electronic equipment and medium, the method comprises the following steps: obtaining a first pressure value on a vehicle sensor and a second pressure value on a hydrogen refueling machine sensor after hydrogen refueling of the hydrogen fuel cell vehicle is completed through the hydrogen refueling machine; obtaining a pressure abnormal state based on a difference between the first pressure value and the second pressure value; if the pressure abnormal state is abnormal, adding the pressure abnormal state and a hydrogen refueling machine number of this time to a historical abnormal record; reading the historical abnormal record; obtaining a vehicle sensor fault state based on the historical abnormal record; if the vehicle sensor fault state is a fault, correcting the vehicle sensor according to the second pressure value; the pressure diagnosis method can diagnose whether the vehicle pressure sensor deviates or is inaccurate, and can also correct the vehicle pressure sensor, thereby ensuring hydrogen storage safety of the hydrogen fuel cell vehicle.

Description

Technical Field

[0001] This application relates to the field of hydrogen storage system technology, specifically to a method, device, electronic equipment, and medium for diagnosing hydrogen storage pressure in a hydrogen fuel cell vehicle. Background Technology

[0002] A hydrogen fuel cell is a device that generates electricity through the chemical reaction of hydrogen and oxygen. The driving force of a hydrogen fuel cell vehicle comes from the electric motor on the vehicle, just like a pure electric vehicle. A hydrogen fuel cell vehicle can be understood as an electric vehicle with its own hydrogen fuel generator. Currently, hydrogen is usually supplied to the hydrogen fuel cell through a hydrogen refueling machine.

[0003] When refueling a hydrogen fuel cell vehicle, the hydrogen storage system's pressure must be within the safe range. If the pressure drops below this range, insufficient hydrogen supply may occur, potentially leading to air entering the system and severely damaging the fuel cell stack. The pressure is obtained from a pressure sensor; however, during vehicle use, these sensors may malfunction or deviate, resulting in inaccurate readings and actual hydrogen pressure values ​​falling below the safe range.

[0004] A pressure sensor calibration method is provided in patent document CN104776957A. This method calibrates the pressure sensor by inputting different pressures to the pressure sensor at different temperatures and by using the linear relationship between the input pressure and the sensor response value. However, this method requires external equipment to test the pressure sensor and is not suitable for calibrating pressure sensors in vehicles. Summary of the Invention

[0005] In view of the shortcomings of the above-mentioned related technologies, this application provides a method, device, electronic device and medium for diagnosing hydrogen storage pressure in hydrogen fuel cell vehicles, so as to solve the technical problem of inaccurate pressure measurement caused by the inaccuracy or deviation of the pressure sensor in the above-mentioned vehicles.

[0006] The pressure diagnosis method includes: after the hydrogen fuel cell vehicle is refueled with hydrogen via a hydrogen refueling machine, acquiring a first pressure value on the vehicle sensor and a second pressure value on the hydrogen refueling machine sensor, and determining a pressure anomaly state based on the difference between the first pressure value and the second pressure value; if the pressure anomaly state is abnormal, adding the current pressure anomaly state and the hydrogen refueling machine number to the historical anomaly record; reading the historical anomaly record and determining the vehicle sensor fault state based on the historical anomaly record; if the vehicle sensor fault state is a fault, calibrating the vehicle sensor according to the second pressure value.

[0007] In one embodiment of this application, before refueling the hydrogen fuel cell vehicle with a hydrogen refueling machine, the method further includes: obtaining the hydrogen storage type and the type of the hydrogen refueling machine of the vehicle; if the hydrogen storage type and the type of the hydrogen refueling machine are successfully matched, then reading a third pressure value on the vehicle sensor; if the third pressure value is higher than a preset pressure threshold, then issuing a hydrogen refueling permission command to allow the vehicle to enter the normal hydrogen refueling state.

[0008] In one embodiment of this application, after reading the third pressure value on the vehicle sensor, the method further includes: if the third pressure value is lower than or equal to a preset pressure threshold, issuing a hydrogen refueling prohibition command to prevent the vehicle from entering the normal hydrogen refueling state.

[0009] In one embodiment of this application, obtaining a pressure abnormality state based on the difference between the first pressure value and the second pressure value includes: obtaining a pressure assessment value based on the difference between the first pressure value and the second pressure value; if the pressure assessment value is less than a preset pressure alarm value, the pressure abnormality state is no abnormality; if the pressure assessment value is greater than or equal to the preset pressure alarm value, the pressure abnormality state is abnormal.

[0010] In one embodiment of this application, after obtaining the pressure abnormality state based on the difference between the first pressure value and the second pressure value, the method further includes: if there are multiple pressure abnormality records and the hydrogen refueling machine numbers in the multiple pressure abnormality records are different, then the vehicle sensor fault state is a fault.

[0011] In one embodiment of this application, calibrating the vehicle sensor based on the second pressure value includes: adjusting the pressure value of the vehicle sensor to be equal to the second pressure value, so that the adjusted vehicle sensor pressure value is equal to the hydrogen refueling machine sensor pressure value.

[0012] In one embodiment of this application, before calibrating the vehicle sensor based on the second pressure value, the method further includes: pushing a message notification suggesting that the user enable vehicle sensor calibration; obtaining a user instruction, the user instruction being used to characterize the user's permission status for the message notification; and if the permission status is permitted, calibrating the vehicle sensor.

[0013] This application also provides a hydrogen fuel cell vehicle hydrogen storage pressure diagnostic device, which includes: a pressure state judgment module, used to obtain a first pressure value on the vehicle sensor and a second pressure value on the hydrogen refueling machine sensor after the hydrogen fuel cell vehicle is refueled by the hydrogen refueling machine, and to obtain a pressure abnormality state based on the difference between the first pressure value and the second pressure value; a historical abnormality recording module, used to add the current pressure abnormality state and the hydrogen refueling machine number to the historical abnormality record if the pressure abnormality state is abnormal; a historical abnormality reading module, used to read the historical abnormality record and obtain the vehicle sensor fault state based on the historical abnormality record; and a sensor calibration module, used to calibrate the vehicle sensor according to the second pressure value if the vehicle sensor fault state is faulty.

[0014] The beneficial effects of this invention are as follows: The embodiments of this application provide a method, device, electronic device, and medium for diagnosing hydrogen storage pressure in a hydrogen fuel cell vehicle. After the hydrogen refueling machine has finished refueling the hydrogen fuel cell vehicle, the method can diagnose the hydrogen storage pressure of the hydrogen fuel cell vehicle by comparing a first pressure value and a second pressure value, determine the abnormal pressure state, add the current abnormal pressure state and the hydrogen refueling machine number to the historical abnormality record, read the historical abnormality record, obtain the vehicle sensor fault state based on the historical abnormality record, and diagnose whether the vehicle sensor has malfunctioned based on multiple historical abnormality records. If the vehicle sensor fault state is a fault, the vehicle sensor is calibrated according to the second pressure value. This pressure diagnosis method can diagnose whether the vehicle pressure sensor has deviated or is inaccurate. At the same time, it can also calibrate the vehicle pressure sensor to prevent insufficient gas supply due to the vehicle pressure sensor reading being too high, which would affect the fuel cell stack, or the vehicle pressure sensor reading being too low, which would shorten the vehicle's driving range or cause overcharging risks.

[0015] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0017] Figure 1 This is a schematic diagram of a hydrogen refueling system for a hydrogen fuel cell vehicle, illustrating an exemplary embodiment of this application.

[0018] Figure 2This is a schematic flowchart illustrating a hydrogen fuel cell vehicle hydrogen storage pressure diagnosis method according to an exemplary embodiment of this application;

[0019] Figure 3 This is a schematic diagram of a hydrogenation process illustrated in an exemplary embodiment of this application;

[0020] Figure 4 This is a schematic diagram illustrating a hydrogen storage pressure diagnostic process, as shown in an exemplary embodiment of this application.

[0021] Figure 5 This is a block diagram illustrating a hydrogen storage pressure diagnostic device for a hydrogen fuel cell vehicle, as shown in an exemplary embodiment of this application.

[0022] Figure 6 A schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application is shown. Detailed Implementation

[0023] The embodiments of this application will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be understood that the preferred embodiments are only for illustrating this application and are not intended to limit the scope of protection of this application.

[0024] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. Therefore, the drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0025] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present application. However, it will be apparent to those skilled in the art that embodiments of the present application may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present application.

[0026] Please see Figure 1 , Figure 1This is a schematic diagram of a hydrogen refueling system for a hydrogen fuel cell vehicle, as illustrated in an exemplary embodiment of this application. The system includes a hydrogen storage tank 101, a solenoid valve 102, a booster pump 103, a hydrogen refueling machine pressure sensor 104, a hydrogen refueling nozzle 105, a hydrogen refueling port 106, a vehicle sensor 107, an on-board hydrogen storage cylinder 108, a vehicle control unit 109, a hydrogen storage control unit 110, and a hydrogen refueling machine control unit 111.

[0027] When refueling a hydrogen fuel cell vehicle, the hydrogen refueling nozzle 105 is connected to the hydrogen refueling port 106. At this time, the hydrogen storage control unit 110 and the hydrogen refueling machine control unit 111 communicate. This communication method can be CAN communication or infrared communication, as long as information can be transmitted. The hydrogen refueling machine determines whether it can refuel normally by judging the pressure and hydrogen storage type of the hydrogen storage control unit 110.

[0028] If the hydrogen refueling machine determines that hydrogen refueling is normal, hydrogen gas enters the hydrogen storage tank 101 of the hydrogen refueling station through the solenoid valve 102 and enters the booster pump 103 for pressurization. Then, it enters the hydrogen refueling port 106 of the hydrogen fuel cell vehicle through the hydrogen refueling nozzle 105, and enters the on-board hydrogen storage cylinder 108 through the high-pressure hydrogen pipeline. The hydrogen refueling machine sensor 104 is arranged in the hydrogen pipeline after the hydrogen refueling nozzle 105, and the vehicle sensor 107 is arranged in the high-pressure hydrogen pipeline between the hydrogen refueling port and the on-board hydrogen storage cylinder 108. The hydrogen refueling machine sensor 104 transmits the hydrogen pressure signal from the hydrogen refueling nozzle to the hydrogen refueling machine control unit 111, and the vehicle sensor 107 transmits the hydrogen storage cylinder pressure signal to the hydrogen storage control unit 110. Then, the hydrogen refueling machine control unit 111 transmits the pressure signal from the hydrogen refueling nozzle 105 to the hydrogen storage control unit 110 through bidirectional communication.

[0029] After normal hydrogen refueling is completed, since the hydrogen refueling gun 105 is connected to the hydrogen refueling port 106, the pressure of the hydrogen refueling gun 105 should be the same as the pressure of the on-board hydrogen storage cylinder 108. Therefore, the hydrogen storage control unit 110 diagnoses the vehicle sensor 107 by comparing the second pressure value detected by the hydrogen refueling machine sensor 104 with the first pressure value detected by the vehicle sensor 107.

[0030] In one embodiment of this application, when refueling a hydrogen fuel cell vehicle, the hydrogen refueling nozzle 105 is connected to the vehicle's hydrogen refueling port 106. Hydrogen gas enters the hydrogen storage tank 101 of the hydrogen refueling machine and is pressurized by the booster pump 103. Then, it enters the on-board hydrogen storage cylinder 108 through the hydrogen refueling nozzle 105 and the hydrogen refueling port 106. The hydrogen storage control unit 110 and the hydrogen refueling machine control unit 111 read the second pressure value on the hydrogen refueling machine sensor 104 and the first pressure value on the vehicle sensor 107, respectively. The hydrogen storage control unit 110 and the hydrogen refueling machine control unit 111 communicate with each other through infrared communication or CAN communication. Based on the first and second pressure values, an abnormal pressure state is detected. When the hydrogen storage control unit 110 detects that the abnormal pressure state is abnormal, it sends a signal to the vehicle control unit 109.

[0031] Please see Figure 2 , Figure 2 This is a schematic flowchart illustrating a hydrogen fuel cell vehicle hydrogen storage pressure diagnosis method in an exemplary embodiment of this application. In an exemplary embodiment, the hydrogen fuel cell vehicle hydrogen storage pressure diagnosis method includes at least steps S210 to S240, which are described in detail below:

[0032] Step S210: After the hydrogen fuel cell is refueled by the hydrogen refueling machine, the first pressure value on the vehicle sensor and the second pressure value on the hydrogen refueling machine sensor are obtained, and the pressure abnormality state is obtained based on the difference between the first pressure value and the second pressure value.

[0033] In one embodiment of this application, obtaining a pressure abnormality state based on the difference between a first pressure value and a second pressure value includes obtaining a pressure assessment value based on the difference between the first pressure value and the second pressure value; if the pressure assessment value is less than a preset pressure alarm value, the pressure abnormality state is no abnormality; if the pressure assessment value is greater than or equal to the preset pressure alarm value, the pressure abnormality state is abnormal.

[0034] In one embodiment of this application, before step S210, before refueling the hydrogen fuel cell vehicle with a hydrogen refueling machine, the method further includes obtaining the hydrogen storage type of the vehicle and the type of the hydrogen refueling machine; if the hydrogen storage type and the type of the hydrogen refueling machine are successfully matched, the third pressure value on the vehicle sensor is read; if the three pressure values ​​are higher than a preset pressure threshold, a hydrogen refueling permission command is issued to allow the vehicle to enter the normal hydrogen refueling state.

[0035] In one embodiment of this application, after reading the third pressure value on the vehicle sensor, the method further includes: if the third pressure value is lower than or equal to a preset pressure threshold, issuing a hydrogen refueling prohibition command to prevent the vehicle from entering the normal hydrogen refueling state.

[0036] Step S220: If the pressure abnormality is abnormal, add the current pressure abnormality and hydrogen dispenser number to the historical abnormality record.

[0037] In one embodiment of this application, the historical anomaly record includes information such as the pressure anomaly status during multiple hydrogen additions, the recording time, and the hydrogen dispenser number. The historical anomaly record can be used to trace the records of previous hydrogen addition pressure anomalies.

[0038] If the pressure anomaly is marked as abnormal, it indicates that the pressure values ​​on the vehicle-mounted sensor and the hydrogen refueling machine sensor are too different. In this case, it is necessary to rule out the possibility of a faulty hydrogen refueling machine sensor. Add the current pressure anomaly status and the hydrogen refueling machine number to the historical anomaly record, and compare multiple pressure anomaly statuses to determine the fault status of the vehicle sensor.

[0039] Step S230: Read historical anomaly records and obtain the vehicle sensor fault status based on the historical anomaly records.

[0040] In one embodiment of this application, reading historical anomaly records and obtaining the vehicle sensor fault status based on the historical anomaly records includes: if there are multiple pressure anomaly records and the hydrogen refueling machine numbers in the multiple pressure anomaly records are different, then the vehicle sensor fault status is fault.

[0041] In one embodiment of this application, if there are multiple historical abnormal records with the same number for a certain hydrogen refueling machine, and no historical abnormal records appear for other hydrogen refueling machines, it is determined that the hydrogen refueling machine sensor of that certain hydrogen refueling machine is faulty, and the vehicle sensor fault status is no fault.

[0042] Step S240: If the vehicle sensor is faulty, then the vehicle sensor is calibrated according to the second pressure value.

[0043] In one embodiment of this application, calibrating the vehicle sensor based on the second pressure value includes adjusting the pressure value of the vehicle sensor to be equal to the second pressure value, so that the adjusted vehicle sensor pressure value is equal to the hydrogen refueling machine sensor pressure value.

[0044] In one embodiment of this application, after ruling out the possibility of a faulty hydrogen refueling machine sensor by comparing historical abnormal records, the pressure value of the vehicle sensor is adjusted based on the principle that the pressure detected by the hydrogen refueling machine sensor and the pressure detected by the vehicle sensor should be consistent, thereby adjusting the pressure value of the vehicle sensor to be consistent with the pressure value of the hydrogen refueling machine sensor.

[0045] In one embodiment of this application, before calibrating the vehicle sensor based on the second pressure value, the method further includes: pushing a message notification suggesting that the user enable vehicle sensor calibration; obtaining a user instruction, the user instruction being used to represent the user's permission status for the message notification; and if the permission status is permitted, calibrating the vehicle sensor.

[0046] Please see Figure 3 , Figure 3 This is a schematic diagram of a hydrogenation process illustrated in an exemplary embodiment of this application. The hydrogenation process includes at least steps S310 to S370, which are described in detail below:

[0047] In step S310, after the hydrogen refueling process begins, the vehicle transmits a message to the hydrogen storage control unit of the hydrogen refueling machine. The hydrogen refueling machine control unit reads the hydrogen storage type of the vehicle (35 MPa or 70 MPa, liquid hydrogen or gaseous hydrogen).

[0048] Step S320: Determine if the hydrogen refueling type matches. The hydrogen refueling machine control unit determines whether the hydrogen refueling machine type matches the hydrogen storage type of the vehicle. If the hydrogen refueling machine type and the hydrogen storage type identified by the hydrogen refueling machine control unit do not match, the process jumps to step S350. In step S350, the hydrogen refueling machine prohibits hydrogen refueling and sends a prompt to the hydrogen refueling operator to replace the appropriate hydrogen refueling machine. If the hydrogen refueling machine type and the hydrogen storage type match, the process jumps to step S330.

[0049] Step S330: Determine whether the vehicle sensor pressure is higher than 1 MPa. The vehicle hydrogen refueling unit reads the third pressure value output by the vehicle sensor and determines whether the third pressure value is higher than a preset pressure threshold. In this embodiment, the preset pressure threshold is 1 MPa. If the third pressure value is higher than 1 MPa, proceed to S340 for processing. If the third pressure value is not higher than 1 MPa, proceed to S360 for processing. It should be noted that 1 MPa in this embodiment is only an exemplary preset pressure threshold. This threshold can be adjusted according to the actual situation and does not limit the scope of this application.

[0050] In step S340, the vehicle enters the hydrogen refueling process normally until the refueling is completed.

[0051] In step S350, if the type of hydrogen dispenser and the type of hydrogen storage do not match, hydrogen dispensing is prohibited, and a prompt is made to replace the hydrogen dispenser with a suitable one.

[0052] In step S360, if the first pressure value is not higher than 1 MPa, the hydrogen refueling machine will prohibit hydrogen refueling and report a pressure abnormality. The hydrogen refueling machine control unit will issue a command to prohibit hydrogen refueling and prompt "Vehicle hydrogen storage pressure is abnormal. Please check the vehicle status with the vehicle manufacturer." This is because when the hydrogen storage pressure of the hydrogen storage system drops to a certain value, insufficient gas supply may occur, or even air may enter the hydrogen storage system, seriously damaging the hydrogen fuel cell stack. Therefore, when the hydrogen storage pressure is lower than a certain value, the fuel cell system will stop operating. The hydrogen storage pressure is generally higher than 2 MPa.

[0053] In step S370, after receiving the abnormal pressure information, the driver confirms with the vehicle manufacturer whether there is any abnormality in the vehicle and asks the vehicle manufacturer to provide an official statement. If the vehicle manufacturer confirms that there is no abnormality in the vehicle, the hydrogen refueling operator can manually turn off the hydrogen refueling prohibition command, and then jump to step S340 to enter the normal hydrogen refueling process. If the vehicle manufacturer confirms that there is an abnormality in the vehicle, hydrogen refueling will be prohibited.

[0054] Please see Figure 4 , Figure 4This is a schematic diagram of a hydrogen storage pressure diagnostic process illustrated in an exemplary embodiment of this application. The process includes using information interaction between the hydrogen storage control unit and the hydrogen refueling control unit to diagnose vehicle sensors. (1) After hydrogen refueling is completed, the hydrogen refueling control unit transmits the second pressure value signal detected by the hydrogen refueling sensor to the hydrogen storage control unit on the vehicle. (2) The hydrogen storage control unit compares the second pressure value with the first pressure value measured on the vehicle sensor and records the percentage difference between the first pressure value P1 and the second pressure value P2 as a, a = |P2-P1| / P1×100%. If a is less than the preset pressure alarm value b, the hydrogen storage control unit determines that the pressure abnormality is not abnormal and the hydrogen refueling ends normally. (3) If a is greater than or equal to b, the hydrogen storage control unit determines that the pressure abnormality is abnormal and records the date, hydrogen refueling machine number and a in the historical abnormality record. (4) Read multiple historical abnormality records to determine whether the pressure abnormality event occurs continuously when using different hydrogen refueling machines. If the determination result is no, the hydrogen storage control unit does not issue a vehicle sensor fault signal. At this time, it may be that the current hydrogen refueling machine sensor is faulty and the vehicle sensor is not working properly. (5) If the judgment result of the continuous occurrence of abnormal pressure state when using different hydrogen refueling machines is yes, the hydrogen storage control unit determines that the vehicle sensor has failed and sends the fault information to the vehicle control unit; (6) After receiving the fault information, the vehicle control unit prompts the user that the vehicle sensor has failed and sends a prompt to the user "whether to enable vehicle sensor calibration". If the user selects no, the passenger is prompted to send the vehicle to the manufacturer for repair and the process ends; (7) If the user selects to enable vehicle sensor calibration, the pressure signal of the vehicle pressure sensor is calibrated based on the pressure signal of the hydrogen refueling gun sensor. The vehicle control unit sends a pressure calibration signal to the hydrogen storage control unit. The hydrogen storage control unit calibrates the pressure value P1 of the vehicle sensor to the pressure value P2 of the hydrogen refueling machine sensor and changes the output pressure value P of the vehicle sensor within the working range to P'. P' = P + (P2 - P1). Because the pressure sensor has a deviation due to some reasons, there is a deviation in the entire working pressure range. After calibration, the vehicle sensor fault disappears and the process ends.

[0055] In the embodiments of this application, a pressure check is performed on the vehicle before refueling with hydrogen to check whether the vehicle's third pressure value is higher than a preset pressure threshold. Since hydrogen is not completely used each time it is used, if the pressure is too low, it is determined that there may be a hydrogen leak or the vehicle is not qualified to refuel with hydrogen.

[0056] In the embodiments of this application, a pressure assessment value is obtained based on the difference between the first pressure value and the second pressure value. The pressure assessment value is then compared with a preset pressure alarm value to obtain the abnormal pressure state and diagnose whether there is an abnormality in the vehicle sensor.

[0057] In the embodiments of this application, if there are multiple abnormal pressure records and the hydrogen refueling machine numbers in the multiple abnormal pressure records are different, the vehicle sensor fault status is diagnosed as a fault, ruling out the possibility that the abnormal pressure status is caused by a fault in the hydrogen refueling machine sensor.

[0058] In the embodiments of this application, the pressure value of the vehicle sensor is adjusted to match the pressure value of the hydrogen refueling machine sensor, and the pressure value of the vehicle sensor is calibrated using the pressure value of the hydrogen refueling machine, which is convenient, quick and accurate.

[0059] In the embodiments of this application, the user experience is improved by obtaining the user's permission status before calibrating the vehicle sensors.

[0060] Figure 5 This is a block diagram illustrating a hydrogen fuel cell vehicle hydrogen storage pressure diagnostic device, as shown in an exemplary embodiment of this application. Figure 5 As shown, the exemplary hydrogen fuel cell vehicle hydrogen storage pressure diagnostic device includes a pressure status judgment module 501, a historical anomaly recording module 502, a historical anomaly reading module 503, and a sensor calibration module 504.

[0061] The pressure state determination module 501 is used to obtain the first pressure value on the vehicle sensor and the second pressure value on the hydrogen refueling machine sensor after the hydrogen fuel cell vehicle is refueled by the hydrogen refueling machine, and to determine the pressure abnormality state based on the difference between the first pressure value and the second pressure value.

[0062] The historical anomaly record module 502 is used to add the current pressure anomaly status and the hydrogen dispenser number to the historical anomaly record if the pressure anomaly status is an anomaly.

[0063] The historical anomaly reading module 503 is used to read historical anomaly records and obtain the vehicle sensor fault status based on the historical anomaly records.

[0064] The sensor calibration module 504 is used to calibrate the vehicle sensor based on the second pressure value if the vehicle sensor is in a fault state.

[0065] It should be noted that the hydrogen fuel cell vehicle hydrogen storage pressure diagnostic device and the hydrogen fuel cell vehicle hydrogen storage pressure diagnostic method provided in the above embodiments belong to the same concept. The specific operation methods of each module and unit have been described in detail in the method embodiments and will not be repeated here. In practical applications, the hydrogen fuel cell vehicle hydrogen storage pressure diagnostic device provided in the above embodiments can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. This is not a limitation here.

[0066] Embodiments of this application also provide an electronic device, including: one or more processors; and a storage device for storing one or more programs, which, when executed by the one or more processors, enable the electronic device to implement the hydrogen fuel cell vehicle hydrogen storage pressure diagnosis method provided in the above embodiments.

[0067] Figure 6 A schematic diagram of a computer system suitable for implementing the embodiments of this application is shown. It should be noted that... Figure 6 The computer system 600 of the electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0068] like Figure 6 As shown, the computer system 600 includes a Central Processing Unit (CPU) 601, which can perform various appropriate actions and processes based on programs stored in Read-Only Memory (ROM) 602 or programs loaded from storage portion 608 into Random Access Memory (RAM) 603, such as performing the methods described in the above embodiments. The RAM 603 also stores various programs and data required for system operation. The CPU 601, ROM 602, and RAM 603 are interconnected via a bus 604. An Input / Output (I / O) interface 605 is also connected to the bus 604.

[0069] The following components are connected to I / O interface 605: an input section 606 including a keyboard, mouse, etc.; an output section 607 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 608 including a hard disk, etc.; and a communication section 609 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to I / O interface 605 as needed. A removable medium 611, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on drive 610 as needed so that computer programs read from it can be installed into storage section 608 as needed.

[0070] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program including a computer program for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 609, and / or installed from removable medium 611. When the computer program is executed by central processing unit (CPU) 601, it performs various functions defined in the system of this application.

[0071] It should be noted that the computer-readable medium shown in the embodiments of this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying a computer-readable computer program. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media can also be any computer-readable medium other than computer-readable storage media, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The computer program contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, etc., or any suitable combination thereof.

[0072] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0073] The units described in the embodiments of this application can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.

[0074] Another aspect of this application provides a computer-readable storage medium storing a computer program thereon, which, when executed by a computer's processor, causes the computer to perform the hydrogen storage pressure diagnostic method for a hydrogen fuel cell vehicle as described above. This computer-readable storage medium may be included in the electronic device described in the above embodiments, or it may exist independently and not incorporated into the electronic device.

[0075] Another aspect of this application provides a computer program product or computer program including computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the hydrogen fuel cell vehicle hydrogen storage pressure diagnosis method provided in the various embodiments above.

[0076] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A method for diagnosing hydrogen storage pressure in a hydrogen fuel cell vehicle, characterized in that, The hydrogen fuel cell vehicle hydrogen storage pressure diagnostic method includes: After the hydrogen fuel cell vehicle is refueled with hydrogen via a hydrogen refueling machine, a first pressure value from the vehicle's sensors and a second pressure value from the hydrogen refueling machine's sensors are obtained. A pressure assessment value is obtained based on the difference between the first pressure value and the second pressure value. If the pressure assessment value is less than a preset pressure alarm value, the pressure abnormality status is no abnormality; if the pressure assessment value is greater than or equal to the preset pressure alarm value, the pressure abnormality status is abnormal. If the pressure anomaly is deemed abnormal, add the current pressure anomaly and the hydrogen dispenser number to the historical anomaly record. Read the historical anomaly records. If there are multiple pressure anomaly records in the historical anomaly records, and the hydrogen refueling machine numbers in the multiple pressure anomaly records are different, then the vehicle sensor fault status is fault. If the vehicle sensor is faulty, the vehicle sensor is calibrated according to the second pressure value, including adjusting the pressure value of the vehicle sensor to be equal to the second pressure value, so that the adjusted vehicle sensor pressure value is equal to the hydrogen refueling machine sensor pressure value.

2. The method for diagnosing hydrogen storage pressure in a hydrogen fuel cell vehicle according to claim 1, characterized in that, Before refueling the hydrogen fuel cell vehicle with hydrogen via a hydrogen refueling machine, the following steps are also included: Obtain the vehicle's hydrogen storage type and hydrogen refueling machine type; If the hydrogen storage type and the hydrogen refueling machine type are successfully matched, then the third pressure value on the vehicle sensor is read. If the third pressure value is higher than the preset pressure threshold, a hydrogen refueling permission command is issued to allow the vehicle to enter normal hydrogen refueling mode.

3. The method for diagnosing hydrogen storage pressure in a hydrogen fuel cell vehicle according to claim 2, characterized in that, After reading the third pressure value from the vehicle's sensors, the following is also included: If the third pressure value is lower than or equal to the preset pressure threshold, a hydrogen refueling prohibition command is issued to prevent the vehicle from entering the normal hydrogen refueling state.

4. The method for diagnosing hydrogen storage pressure in a hydrogen fuel cell vehicle according to claim 1 or 2, characterized in that, Before calibrating the vehicle sensor based on the second pressure value, the method further includes: Push notifications suggesting users enable vehicle sensor calibration; Obtain user instructions, which are used to represent the user's permission status for the message notification; If the permitted state is permitted, the vehicle sensors are calibrated.

5. A hydrogen storage pressure diagnostic device for a hydrogen fuel cell vehicle, characterized in that, The hydrogen fuel cell vehicle hydrogen storage pressure diagnostic device includes: The pressure status judgment module is used to obtain a first pressure value on the vehicle sensor and a second pressure value on the hydrogen refueling machine sensor after the hydrogen fuel cell vehicle has been refueled with hydrogen by the hydrogen refueling machine, and to obtain a pressure evaluation value based on the difference between the first pressure value and the second pressure value; wherein, if the pressure evaluation value is less than a preset pressure alarm value, the pressure abnormality status is no abnormality; if the pressure evaluation value is greater than or equal to the preset pressure alarm value, the pressure abnormality status is abnormal. The historical anomaly record module is used to add the current pressure anomaly status and hydrogen dispenser number to the historical anomaly record if the pressure anomaly status is an anomaly. The historical anomaly reading module is used to read the historical anomaly records. If there are multiple pressure anomaly records in the historical anomaly records, and the hydrogen refueling machine numbers in the multiple pressure anomaly records are different, then the vehicle sensor fault status is fault. The sensor calibration module is used to calibrate the vehicle sensor according to the second pressure value if the vehicle sensor is in a fault state. This includes adjusting the pressure value of the vehicle sensor to be equal to the second pressure value, so that the adjusted vehicle sensor pressure value is equal to the hydrogen refueling machine sensor pressure value.

6. An electronic device, characterized in that, The electronic device includes: One or more processors; A storage device for storing one or more programs, which, when executed by one or more processors, cause the electronic device to implement the hydrogen storage pressure diagnosis method for a hydrogen fuel cell vehicle as described in any one of claims 1 to 4.

7. A computer-readable storage medium, characterized in that, It stores a computer program, which, when executed by the computer's processor, causes the computer to perform the hydrogen storage pressure diagnosis method for hydrogen fuel cell vehicles as described in any one of claims 1 to 4.

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