Detection method, device and terminal for hydrogen subsystem state detection

Abstract

The invention particularly relates to a detection method and device for hydrogen subsystem state detection and a terminal. The detection method comprises the following steps: S1, after a hydrogen cylinder is opened, entering a detection mode of the hydrogen subsystem; s2, acquiring initial pressure values before the hydrogen inlet module, before the pressure release valve, before the inlet of the galvanic pile and before the steam-water separation module; s3, opening the hydrogen inlet module, and monitoring operation time and a pressure value before an inlet of the electric pile; s4, acquiring a first detection time and a first pressure set of each pressure initial value acquisition point when the pressure value before the inlet of the galvanic pile reaches the standard pressure after the operation for the standard time; and S5, in combination with the standard pressure set, the standard time, the standard pressure, the first detection time and the first pressure set, performing criterion on the operation fault of the hydrogen subsystem. The method and the device have the effects of reducing resource occupation and improving detection timeliness.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cell detection, and in particular to a detection method, device and terminal for hydrogen subsystem status detection. Background Art

[0002] A hydrogen fuel cell is a device that generates an electrochemical reaction between hydrogen and oxygen under catalysis and outputs electrical energy. A hydrogen fuel cell is composed of alternating bipolar plates and membrane electrodes, and each monomer is sealed to each other by a seal. Among them, a hydrogen fuel cell requires a hydrogen subsystem and an air subsystem to continuously provide hydrogen and air for the catalytic reaction to the stack. Since hydrogen is a highly flammable and highly dangerous chemical, a detection system is often required to detect the state of hydrogen during use. The hydrogen detection system provided in the prior art often needs to drive the entire hydrogen fuel cell to operate to check the communication and function of the main components. This detection method has a large hysteresis, and often the entire system needs to be started to work after an abnormality occurs. After the hydrogen state detection is completed, damage and danger have already occurred. In addition, this detection method also has the problem of excessive resource occupation of the hydrogen fuel cell system. It is only necessary to detect the operating state of the hydrogen subsystem, but it is necessary to operate all other subsystems of the hydrogen fuel cell such as the air subsystem and the stack, resulting in unreasonable waste of resources. Summary of the invention

[0003] In view of the technical problems in the prior art of damage and danger caused by lag in hydrogen subsystem detection and waste caused by resource occupation, the present invention provides a detection method, device and terminal for hydrogen subsystem status detection, which have at least the advantages of convenient, timely and highly targeted detection.

[0004] First aspect

[0005] The present invention provides a detection method for detecting the state of a hydrogen subsystem, wherein the hydrogen subsystem comprises a hydrogen inlet module, a hydrogen circulation module and a steam-water separation module; the hydrogen circulation module is connected to a fuel cell stack, and a pressure relief valve is arranged before the fuel cell stack. The detection method comprises the following steps:

[0006] S1. After the hydrogen cylinder is opened, the detection mode of the hydrogen subsystem is entered;

[0007] S2, obtaining initial pressure values ​​before the hydrogen inlet module, before the pressure relief valve, before the inlet of the fuel cell stack, and before the steam-water separation module;

[0008] S3, opening the hydrogen inlet module, monitoring the operating time and the pressure value before the inlet of the fuel cell stack;

[0009] S4, after the standard operating time, or when the pressure value before the inlet of the fuel cell stack reaches the standard pressure, obtaining the first detection time and the first pressure set of each pressure initial value acquisition point;

[0010] S5. Combining the standard pressure set with the standard time, standard pressure, first detection time and first pressure set, a criterion is made for the operation failure of the hydrogen subsystem;

[0011] Among them, the first pressure set includes a first hydrogen inlet pressure, a first pressure relief pressure, a first inlet pressure and a first separation pressure; the standard pressure set includes standard pressures corresponding to each initial value acquisition point, namely, standard hydrogen inlet pressure, standard pressure relief pressure, standard inlet pressure and standard separation pressure.

[0012] It is worth explaining that the first hydrogen inlet pressure is the pressure before the hydrogen inlet module, the first pressure relief pressure is the pressure before the pressure relief valve, the first inlet pressure is the pressure before the inlet of the fuel cell stack, and the first separation pressure is the pressure before the steam-water separation module; the schematic representation of each pressure in the standard pressure set is similar.

[0013] Specifically, one of the main concepts of the present invention is to detect the operating status of the hydrogen subsystem by only driving the hydrogen subsystem itself to operate, and to judge the operating status of each module of the hydrogen subsystem in combination with time parameters and pressure parameters, thereby achieving the purpose of targeted and timely detection of the hydrogen subsystem operation, so as to achieve the effect of reducing resource occupation and improving the timeliness of detection.

[0014] Further, when the first detection time and the first inlet pressure simultaneously meet the standard time and the standard pressure, the first criterion is executed:

[0015] S510, comparing whether the first pressure set meets the standard pressure set; if so, executing step S511; if not, executing step S512;

[0016] S511, determining that the hydrogen subsystem is in a normal state;

[0017] S512. When the first separation pressure maintains the initial value, it is determined that the anode cavity of the fuel cell stack is blocked, or it is determined that the pipeline section before the steam-water separation module is blocked.

[0018] Specifically, another concept of the present invention is to detect the operating state of the hydrogen subsystem when the standard pressure is established within the standard time using a pair of criteria. Step S511 is used to determine the normal operating state of the hydrogen subsystem, and step S512 is used to detect other abnormal faults when the standard pressure is established, so as to specifically check other abnormalities of the hydrogen subsystem that has completed the pressure establishment normally.

[0019] Optionally, when the first inlet pressure meets the standard pressure and the first detection time is less than the standard time, the second criterion is executed:

[0020] S520: Determine whether the hydrogen subsystem or the anode chamber of the fuel cell stack contains liquid water.

[0021] Specifically, one of the further concepts of the present invention is to use criterion 2 to detect the operating state of the hydrogen subsystem when the standard pressure is built up too quickly, and to use the presence of liquid water in the anode cavity of the hydrogen subsystem or the fuel cell stack as the criterion result.

[0022] Further, after step S520, the following steps are included:

[0023] S521. Calculate the volume value of liquid water according to the formula, and upload the volume value;

[0024] The volume value is calculated as: V l =V0-V g ;

[0025] Among them, V l is the volume of liquid water, V0 is the total volume of the anode of the stack, V g is the volume of the gas, R is the molar gas constant, T is the medium temperature, P1 is the standard pressure, P0 is the initial value before the inlet of the stack, n is the amount of new hydrogen substance, P N is the standard pressure, T N is the standard temperature, V N is the standard volume, t0 is the pressure build-up time, Q N is the standard flow rate, p is the pressure before the hydrogen inlet module, K v is the flow coefficient, ρ N is the standard density of the medium.

[0026] It is worth explaining that the calculation steps of liquid water are as follows:

[0027] ① Establish the flow characteristic formula of the proportional valve,

[0028] ② Integrate the time on both sides of the flow characteristic formula to obtain the total intake air volume at the first detection time; the integral formula is as follows:

[0029] and

[0030] ③ According to the partial pressure law and the ideal gas state equation, calculate the volume of liquid water. The calculation formula is as follows:

[0031] V l =V0-V g .

[0032] Specifically, one of the other main concepts of the present invention is to calculate the volume of liquid water through the flow characteristic formula, the partial pressure law and the ideal state equation to confirm the residual amount of liquid water in the anode chamber of the hydrogen subsystem or the fuel cell stack, so as to better detect the state of the hydrogen subsystem and avoid excessive accumulation of liquid water in the hydrogen subsystem, which may cause freezing anomalies after continuous operation of the hydrogen subsystem.

[0033] Optionally, when the first detection time meets the standard time and the first inlet pressure maintains an initial value, criterion three is executed:

[0034] S530, comparing whether the first hydrogen injection pressure meets the standard hydrogen injection pressure; when the first hydrogen injection pressure meets the standard hydrogen injection pressure, executing step S531, otherwise executing step S532;

[0035] S531, comparing whether the first pressure relief pressure is an initial value; when the first pressure relief pressure remains at the initial value, executing step S533, or, when the first pressure relief pressure is greater than the initial value, executing step S534;

[0036] S532, determining that the pipeline section before the hydrogen inlet module is abnormal;

[0037] S533, determining that the pipeline section between the hydrogen inlet module and the pressure relief valve is abnormal;

[0038] S534, determining whether the pipeline section from after the hydrogen inlet module to before the inlet of the fuel cell stack is blocked.

[0039] Specifically, one of the main concepts of the present invention is to detect the operating state of the hydrogen subsystem when the first detection pressure at the inlet of the hydrogen gas of the fuel cell stack continues to maintain an initial value using criterion three, and to judge the pipeline section with abnormal faults in the hydrogen subsystem.

[0040] Optionally, when the first detection time meets the standard time and the first inlet pressure is greater than the initial value and less than the standard pressure, criterion four is executed:

[0041] S540: Determine whether there is leakage in the hydrogen subsystem or in the inner cavity of the fuel cell stack.

[0042] Optionally, another concept of the present invention is to judge the situation in which the pressure at the hydrogen inlet is built up but the build-up time is too long through four criteria.

[0043] Furthermore, after step S540, the following steps are continued:

[0044] S541, running the second detection time and obtaining the second inlet pressure; within the second detection time, when the second inlet pressure meets the standard pressure, executing step S542; otherwise, executing step S543;

[0045] S542, set the leakage level to mild to moderate leakage;

[0046] S543, setting the leakage level to severe leakage, and determining that the pressure relief valve is abnormal.

[0047] Specifically, the present invention uses the second detection time to make an in-depth judgment on the emergency situation of hydrogen leakage in criterion 4. It is worth explaining that the second inlet pressure is the pressure obtained by monitoring before the inlet of the stack after the first detection time and the second detection time.

[0048] Optionally, after step S4, the following steps are included:

[0049] S41, close the hydrogen inlet module, run the third detection time, record the pressure change state before the inlet of the fuel cell stack, if the pressure continues to increase, execute step S42; if the pressure drop is greater than the standard pressure drop, execute step S43;

[0050] S42, determining that the closing function of the valve body of the hydrogen inlet module is abnormal;

[0051] S43, detecting the cathode pressure of the battery stack, if the cathode pressure increases abnormally, executing step S44; if the cathode pressure is normal, executing step S45;

[0052] S44, determining that the battery stack has severe leakage;

[0053] S45. Determine whether the fuel cell stack or the hydrogen subsystem has a light to moderate leak.

[0054] Specifically, another main concept of the present invention is to judge the status of the hydrogen inlet module, the fuel cell stack and the cathode of the fuel cell stack by pressure drop detection, so as to improve the comprehensiveness of the fault diagnosis of the present invention. It is worth explaining that the standard pressure drop is the pressure drop value of the pipe section under normal conditions.

[0055] Optionally, the detection method for hydrogen subsystem status detection provided by the present invention can be applied to devices or equipment with program running functions such as terminals, processors, and single-chip microcomputers.

[0056] Second aspect

[0057] The present invention provides a detection device for hydrogen subsystem state detection, which is used to implement a detection method for hydrogen subsystem state detection as provided in any possible embodiment of the first aspect, comprising: a hydrogen inlet module, a hydrogen circulation module and a steam-water separation module sequentially arranged in a hydrogen supply path, and a data acquisition and analysis module;

[0058] The hydrogen inlet module includes a stop valve and a proportional valve;

[0059] The hydrogen circulation module comprises an ejector, a circulation pump, a pressure relief valve and a one-way valve;

[0060] The steam-water separation module includes a steam-water separator, a drain valve, and an exhaust valve;

[0061] A medium pressure sensor is arranged before the stop valve, a low pressure sensor is arranged before the pressure relief valve, an inlet sensor is arranged before the hydrogen inlet of the fuel cell stack, and an outlet sensor is arranged before the steam-water separator;

[0062] The data acquisition and analysis modules are electrically connected to each sensor respectively.

[0063] Specifically, another main concept of the present invention is to use a data acquisition and analysis module and a pressure sensor arranged in each module to detect and analyze the time and pressure parameters of the hydrogen subsystem, thereby judging the state of the hydrogen subsystem using the detection method provided by a possible embodiment of the first aspect.

[0064] It is worth explaining that the medium pressure sensor is used to obtain the first hydrogen inlet pressure, the low pressure sensor is used to obtain the first pressure relief pressure, the inlet sensor is used to obtain the first inlet pressure, and the outlet sensor is used to obtain the first separation pressure.

[0065] The third aspect

[0066] The present invention provides a terminal, which includes at least one processor, a communication interface and a memory, wherein the communication interface is used to send and / or receive data, the memory is used to store computer programs, and the at least one processor is used to call a computer program stored in at least one memory to implement a detection method for hydrogen subsystem status detection as provided in any possible embodiment of the first aspect.

[0067] It should be noted that the processor included in the terminal described in the fifth aspect above may be a processor specifically used to execute these methods (for convenience of distinction, referred to as a dedicated processor), or a processor that executes these methods by calling a computer program, such as a general-purpose processor. Optionally, at least one processor may include both a dedicated processor and a general-purpose processor.

[0068] Optionally, the computer program may be stored in a memory. Exemplarily, the memory may be a non-transitory memory, such as a read-only memory (ROM), which may be integrated with the processor on the same device or may be separately provided on different devices. The embodiment of the present invention does not limit the type of memory and the configuration of the memory and the processor.

[0069] In summary, the present invention provides a detection method, device and terminal for hydrogen subsystem status detection, which have at least the following advantages:

[0070] 1. The present invention detects the operating status of the hydrogen subsystem by only driving the hydrogen subsystem itself, and judges the operating status of each module of the hydrogen subsystem in combination with time parameters and pressure parameters, thereby achieving the purpose of targeted and timely detection of the hydrogen subsystem operation, so as to achieve the effect of reducing resource occupation and improving detection timeliness;

[0071] 2. The present invention uses criteria 1 to 4, takes the pressure detection at the hydrogen inlet as the basis for distinction, detects the leakage, blockage, liquid water and other conditions of the hydrogen subsystem and the anode cavity of the stack, and covers the pipeline sections of each module of the hydrogen subsystem through this criterion method, thereby improving the comprehensiveness and reliability of hydrogen subsystem fault detection;

[0072] 3. The present invention also determines the status of the hydrogen inlet module, the fuel cell stack and the cathode of the fuel cell stack through voltage drop detection, thereby improving the comprehensiveness of hydrogen subsystem fault diagnosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0074] Figure 1 A schematic flow chart of a detection method for detecting the state of a hydrogen subsystem provided by an embodiment of the present invention;

[0075] Figure 2 A schematic flow chart of a detection method for detecting the state of a hydrogen subsystem provided by another embodiment of the present invention;

[0076] Figure 3 A schematic flow chart of a detection method for detecting the state of a hydrogen subsystem provided by another embodiment of the present invention;

[0077] Figure 4 A schematic structural diagram of a detection device for detecting the state of a hydrogen subsystem provided by an embodiment of the present invention;

[0078] Figure 5 A schematic diagram of the structure of a terminal provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0079] The following is combined with Figures 1 to 5 , the present invention is described in detail.

[0080] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0081] The main technical concept of the present invention is to provide a detection method for independently detecting the status of a hydrogen subsystem in response to possible leakage, water accumulation, ice formation, etc. before the hydrogen fuel cell is started, and the pressure detection at the hydrogen inlet is used as the basis for judging the operating failure of the hydrogen subsystem. Through the detection method, device and terminal of the hydrogen subsystem provided by the present invention, the status of the hydrogen system of the hydrogen fuel cell can be detected by starting the hydrogen subsystem without starting the entire hydrogen fuel cell, which has the advantages of timely detection and strong pertinence. At the same time, the present invention can also comprehensively detect various fault conditions such as leakage, liquid water accumulation, blockage, etc.

[0082] For further information, see Figure 1The figure is a schematic flow chart of a detection method for detecting the status of a hydrogen subsystem provided by an embodiment of the present invention.

[0083] Specifically, the core concept of the present invention is to turn on only the hydrogen subsystem without turning on the entire hydrogen fuel cell, and to detect the state of the hydrogen subsystem through standard time and standard pressure. The standard time is the time required for the hydrogen subsystem to build the hydrogen inlet pressure at the hydrogen inlet of the fuel cell stack, and the standard pressure is the hydrogen inlet pressure required at the hydrogen inlet of the fuel cell stack. The detection method for hydrogen subsystem state detection provided by the present invention includes: step S1, after the hydrogen cylinder is turned on, entering the detection mode of the hydrogen subsystem; step S1 is used to obtain the flag issued for the opening of the hydrogen cylinder, and after the hydrogen cylinder is turned on, entering the hydrogen subsystem detection mode. Then, through step S2, the initial pressure values ​​before the hydrogen inlet module, before the pressure relief valve, before the inlet of the fuel cell stack, and before the steam-water separation module are obtained; wherein, the initial value refers to the detection value of each pressure sensor when the hydrogen subsystem is started; then, step S3 is performed to open the hydrogen inlet module to monitor the operating time and the pressure value before the inlet of the fuel cell stack; and through step S4, after the standard operating time, or when the pressure value before the inlet of the fuel cell stack reaches the standard pressure, the first detection time and the first pressure set of each pressure initial value acquisition point are obtained, and data for hydrogen subsystem abnormality judgment is obtained; finally, through step S5, the operating fault of the hydrogen subsystem is judged in combination with the standard pressure set and the standard time, standard pressure, the first detection time and the first pressure set, and the judgment result is uploaded.

[0084] It is worth explaining that when different modules in the hydrogen subsystem fail, the pressure values ​​of each module are different, so the size of the pressure sensor in each module can be detected, and then the failure of each module in the hydrogen subsystem can be judged according to the detection result. In the above manner, the present invention does not need to run the entire hydrogen fuel cell system, but only needs to run the above detection method before the hydrogen fuel cell is started or during the shutdown and maintenance of the hydrogen fuel cell, so as to eliminate the failure of the hydrogen subsystem, and has the advantages of short troubleshooting delay and low detection cost.

[0085] Further, in order to further refine the diagnostic process of the present invention, please refer to Figure 2 FIG. 1 is a flow chart of a detection method for detecting the status of a hydrogen subsystem provided by another embodiment of the present invention.

[0086] Specifically, the present invention is divided into at least four criterion processes according to the state of the first inlet pressure before the inlet of the fuel cell stack and in combination with the standard time and the standard pressure:

[0087] Example 1

[0088] Complete the construction of the standard pressure within the standard time, that is, when the first detection time and the first inlet pressure simultaneously meet the standard time and the standard pressure (the activation condition of criterion one), then compare the first pressure set to see whether it meets the standard pressure set through step S510. If it meets, determine that the hydrogen subsystem is operating normally according to step S511. If it does not meet, obtain the first separation pressure according to step S512 to confirm whether it is the initial value. When it is the initial value, determine that the anode cavity of the fuel cell stack is blocked, or determine that the pipeline section before the steam-water separation module is blocked.

[0089] Example 2

[0090] The standard pressure test is completed in advance before the standard time, that is, when the first inlet pressure meets the standard pressure, but the first detection time is less than the standard time (the activation condition of criterion 2), it is determined that liquid water exists in the anode chamber of the hydrogen subsystem or the fuel cell stack.

[0091] It is worth explaining that the present invention further calculates the volume of liquid water, and the calculation process of the volume value is as follows:

[0092] ① Establish the flow characteristic formula of the proportional valve,

[0093] Q N is the standard flow rate, p is the pressure at the inlet of the proportional valve, K v is the flow coefficient, T is the medium temperature, ρ N is the standard density of the medium;

[0094] ② Integrate the time on both sides of the flow characteristic formula to obtain the total intake air volume at the first detection time; the integral formula is as follows:

[0095] and

[0096] V N is the standard volume, t0 is the pressure building time, n is the amount of new hydrogen substance, P N is the standard pressure, R is the molar gas constant, T N is the standard temperature;

[0097] ③ According to the partial pressure law and the ideal gas state equation, calculate the volume of liquid water; the calculation formula is as follows:

[0098] V l =V0-V g ;

[0099] V lis the volume of liquid water, V0 is the total volume of the anode of the stack, V g is the gas volume, P1 is the standard pressure and P0 is the initial value at the hydrogen inlet.

[0100] Example 3

[0101] If the construction of the standard pressure is not completed within the standard time, the judgment is performed in two steps. Example 3 provides the first judgment process (the following Example 4 is the second). Among them, when the first inlet pressure maintains the initial value (the activation condition of the judgment three), the step S530 is executed to compare whether the first hydrogen inlet pressure meets the standard hydrogen inlet pressure; when the first hydrogen inlet pressure meets the standard hydrogen inlet pressure, step S531 is executed, otherwise step S532 is executed; wherein step S531 is to compare whether the first pressure relief pressure is the initial value; when the first pressure relief pressure maintains the initial value, step S533 is executed, or, when the first pressure relief pressure is greater than the initial value, step S533 is executed; S532 is determined to be abnormal in the pipeline section from the hydrogen cylinder to the shut-off valve; S533 is determined to be abnormal in the pipeline section from the hydrogen inlet module to the ejector of the hydrogen circulation module; S534 is determined to be blocked in the pipeline section from the ejector to the hydrogen inlet.

[0102] Example 4

[0103] The construction of the standard pressure is not completed within the standard time, but the construction of the standard pressure is completed within the subsequent time, that is, when the first detection time meets the standard time, but the first inlet pressure is greater than the initial value and less than the standard pressure (the enabling condition of criterion four), through step S540, it is determined that there is a leakage in the hydrogen subsystem or the inner cavity of the fuel cell stack.

[0104] Due to the danger of hydrogen, when hydrogen leaks, step S541 will be executed, a second detection time will be run, and the second inlet pressure will be continuously obtained; within the second detection time, when the second inlet pressure meets the standard pressure, step S542 will be executed; otherwise, step S543 will be executed; S542, the leakage level will be set to light to moderate leakage; S543, the leakage level will be set to severe leakage, and an abnormality will be reported in the pressure relief valve of the hydrogen inlet module.

[0105] In addition, the present invention also uses a pressure drop test to synchronously determine the abnormality of the hydrogen subsystem, see Figure 3 FIG. 1 is a flow chart of a detection method for detecting the status of a hydrogen subsystem provided by another embodiment of the present invention.

[0106] Specifically, after completing step S4, the present invention closes the stop valve and the proportional valve through step S41, runs the third detection time, records the pressure change state at the hydrogen inlet, and if the pressure continues to increase, executes step S42; if the pressure drop is greater than the standard pressure drop, executes step S43; and according to step S42, determines that the closing function of the stop valve and the proportional valve is abnormal; S43, detects the cathode pressure of the stack, if the cathode pressure increases abnormally, executes step S44; if the cathode pressure is normal, executes step S45; S44, determines that the stack has a severe leak; S45, determines that the stack or the hydrogen subsystem has a mild to moderate leak. Therefore, the severity of the leakage of the hydrogen subsystem can be judged through steps S44 and S45.

[0107] At the same time, the present invention also provides a detection device for detecting the status of the hydrogen subsystem, see Figure 4 FIG. 1 is a schematic diagram of the structure of a detection device for detecting the state of a hydrogen subsystem provided by an embodiment of the present invention.

[0108] Specifically, the detection device provided by the present invention includes a hydrogen heating module, a hydrogen intake module, a hydrogen circulation module, a steam-water separation module and a data acquisition and analysis module which are sequentially arranged on the hydrogen supply path; the hydrogen intake module includes a shut-off valve, a proportional valve and a pressure relief valve; the hydrogen circulation module includes an ejector, a circulation pump and a one-way valve; the steam-water separation module includes a steam-water separator, a drain valve and an exhaust valve; a medium-pressure sensor is arranged before the shut-off valve, a low-pressure sensor is arranged after the ejector, the pressure relief valve is arranged after the low-pressure sensor, an inlet sensor is arranged at the hydrogen inlet of the fuel cell stack, and an outlet sensor is arranged before the steam-water separator; the data acquisition and analysis module collects and analyzes the data of each sensor, and uploads the judgment result.

[0109] It is worth explaining that the hydrogen heating module is used for low-temperature hydrogen startup and does not correspond to the use of the detection method provided by the present invention.

[0110] Furthermore, the present invention provides a terminal, see Figure 5 FIG. 1 is a schematic diagram of the structure of a terminal provided by an embodiment of the present invention.

[0111] Specifically, the terminal includes: a processor, a communication interface and a memory. The processor, the communication interface and the memory may be connected via a bus or other methods. The embodiment of the present invention takes the connection via a bus as an example.

[0112] Among them, the processor is the computing core and control core of the terminal, which can parse various instructions in the terminal and various data of the terminal. For example, the processor can be a central processing unit (CPU), which can transmit various interactive data between the internal structures of the terminal, and so on. The communication interface can optionally include a standard wired interface, a wireless interface (such as WI-FI, a mobile communication interface, etc.), which can be used to send and receive data under the control of the processor; the communication interface can also be used for the transmission and interaction of internal signaling or instructions of the terminal. The memory is a memory device in the terminal for storing programs and data. It can be understood that the memory here can include both the built-in memory of the terminal and the extended memory supported by the terminal. The memory provides a storage space, which stores the operating system of the terminal, and the program code or instructions required for the processor to perform the corresponding operation. Optionally, the storage space can also store the relevant data generated after the processor performs the corresponding operation.

[0113] In the embodiment of the present invention, the processor runs the executable program code in the memory to perform the following operations:

[0114] S1. After the hydrogen cylinder is opened, the detection mode of the hydrogen subsystem is entered;

[0115] S2, obtaining initial pressure values ​​before the hydrogen inlet module, before the pressure relief valve, before the inlet of the fuel cell stack, and before the steam-water separation module;

[0116] S3, opening the hydrogen inlet module, monitoring the operating time and the pressure value before the inlet of the fuel cell stack;

[0117] S4, after the standard operating time, or when the pressure value before the inlet of the fuel cell stack reaches the standard pressure, obtaining the first detection time and the first pressure set of each pressure initial value acquisition point;

[0118] S5. Combining the standard pressure set with the standard time, standard pressure, first detection time and first pressure set, a criterion is made for the operation failure of the hydrogen subsystem.

[0119] The present invention is described in detail above. The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the present invention and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A detection method for detecting the state of a hydrogen subsystem, wherein the hydrogen subsystem comprises a hydrogen inlet module, a hydrogen circulation module and a steam-water separation module; the hydrogen circulation module is connected to a fuel cell stack, and a pressure relief valve is provided before the fuel cell stack, characterized in that: The following steps are involved: S1. After the hydrogen cylinder is opened, the detection mode of the hydrogen subsystem is entered; S2, obtaining initial pressure values ​​before the hydrogen inlet module, before the pressure relief valve, before the inlet of the fuel cell stack, and before the steam-water separation module; S3, opening the hydrogen inlet module, monitoring the operating time and the pressure value before the inlet of the fuel cell stack; S4, after the standard operating time, or when the pressure value before the inlet of the fuel cell stack reaches the standard pressure, obtaining the first detection time and the first pressure set of each pressure initial value acquisition point; S5. Combining the standard pressure set with the standard time, standard pressure, first detection time and first pressure set, a criterion is made for the operation failure of the hydrogen subsystem; Among them, the first pressure set includes a first hydrogen inlet pressure, a first pressure relief pressure, a first inlet pressure and a first separation pressure, and the standard pressure set includes standard pressures corresponding to the points where each pressure initial value is obtained, namely, standard hydrogen inlet pressure, standard pressure relief pressure, standard inlet pressure and standard separation pressure.

2. A detection method for hydrogen subsystem status detection according to claim 1, characterized in that: When the first detection time and the first inlet pressure simultaneously meet the standard time and the standard inlet pressure, the first criterion is executed: S510, comparing whether the first pressure set meets the standard pressure set; if so, executing step S511; if not, executing step S512; S511, determining that the hydrogen subsystem is in a normal state; S512. When the first separation pressure maintains the initial value, it is determined that the anode cavity of the fuel cell stack is blocked, or it is determined that the pipeline section before the steam-water separation module is blocked.

3. A detection method for hydrogen subsystem status detection according to claim 1, characterized in that: When the first inlet pressure meets the standard pressure and the first detection time is less than the standard time, the second criterion is executed: S520: Determine whether the hydrogen subsystem or the anode chamber of the fuel cell stack contains liquid water.

4. A detection method for hydrogen subsystem status detection as claimed in claim 3, characterized in that: After step S520, the following steps are included: S521. Calculate the volume value of liquid water according to the formula, and upload the volume value; The volume value is calculated as follows: l =V0-V g ; Among them, V l is the volume of liquid water, V0 is the total volume of the anode of the stack, V g is the volume of the gas, R is the molar gas constant, T is the medium temperature, P1 is the standard pressure, P0 is the initial value before the inlet of the stack, n is the amount of new hydrogen substance, P N is the standard pressure, T N is the standard temperature, V N is the standard volume, t0 is the pressure build-up time, Q N is the standard flow rate, p is the pressure before the hydrogen inlet module, K v is the flow coefficient, ρ N is the standard density of the medium.

5. A detection method for hydrogen subsystem status detection according to claim 1, characterized in that: When the first detection time meets the standard time and the first inlet pressure maintains the initial value, the third criterion is executed: S530, comparing whether the first hydrogen injection pressure meets the standard hydrogen injection pressure; when the first hydrogen injection pressure meets the standard hydrogen injection pressure, executing step S531, otherwise executing step S532; S531, comparing whether the first pressure relief pressure is an initial value; when the first pressure relief pressure remains at the initial value, executing step S533, or, when the first pressure relief pressure is greater than the initial value, executing step S534; S532, determining that the pipeline section before the hydrogen inlet module is abnormal; S533, determining that the pipeline section between the hydrogen inlet module and the pressure relief valve is abnormal; S534, determining whether the pipeline section from after the hydrogen inlet module to before the inlet of the fuel cell stack is blocked.

6. A detection method for hydrogen subsystem status detection as claimed in claim 5, characterized in that: When the first detection time meets the standard time and the first inlet pressure is greater than the initial value and less than the standard pressure, the fourth criterion is executed: S540: Determine whether there is leakage in the hydrogen subsystem or in the inner cavity of the fuel cell stack.

7. A detection method for hydrogen subsystem status detection according to claim 6, characterized in that: After step S540, continue to perform the following steps: S541, running the second detection time and obtaining the second inlet pressure; within the second detection time, when the second inlet pressure meets the standard pressure, executing step S542; otherwise, executing step S543; S542, set the leakage level to mild to moderate leakage; S543, setting the leakage level to severe leakage, and determining that the pressure relief valve is abnormal.

8. A detection method for hydrogen subsystem status detection as claimed in claim 1, characterized in that: After step S4, the following steps are included: S41, close the hydrogen inlet module, run the third detection time, record the pressure change state before the inlet of the fuel cell stack, if the pressure continues to increase, execute step S42; if the pressure drop is greater than the standard pressure drop, execute step S43; S42, determining that the closing function of the valve body of the hydrogen inlet module is abnormal; S43, detecting the cathode pressure of the battery stack, if the cathode pressure increases abnormally, executing step S44; if the cathode pressure is normal, executing step S45; S44, determining that the battery stack has severe leakage; S45. Determine whether the fuel cell stack or the hydrogen subsystem has a light to moderate leak.

9. A detection device for hydrogen subsystem state detection, used to implement a detection method for hydrogen subsystem state detection as claimed in any one of claims 1 to 8, characterized in that: include: A hydrogen inlet module, a hydrogen circulation module, a steam-water separation module, and a data acquisition and analysis module are sequentially arranged on the hydrogen supply path; The hydrogen inlet module includes a stop valve and a proportional valve; The hydrogen circulation module comprises an ejector, a circulation pump, a pressure relief valve and a one-way valve; The steam-water separation module includes a steam-water separator, a drain valve, and an exhaust valve; A medium pressure sensor is arranged before the stop valve, a low pressure sensor is arranged before the pressure relief valve, an inlet sensor is arranged before the hydrogen inlet of the fuel cell stack, and an outlet sensor is arranged before the steam-water separator; The data acquisition and analysis modules are electrically connected to each sensor respectively.

10. A terminal, characterized in that: The terminal includes at least one processor, a communication interface and a memory, the communication interface is used to send and / or receive data, the memory is used to store computer programs, and the at least one processor is used to call a computer program stored in at least one memory to implement a detection method for hydrogen subsystem status detection as described in any one of claims 1-8.

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