Hydrogen desorption rate control system and method for hydrogen cycle test of vehicle-mounted hydrogen storage system

Abstract

The invention relates to a hydrogen desorption rate control system and method for a hydrogen cycle test of a vehicle-mounted hydrogen storage system, and the system comprises a tested gas cylinder which is internally provided with a pressure sensor, and the pressure sensor is used for collecting the real-time pressure value of the tested gas cylinder; the output end of the pressure sensor is electrically connected to the input end of the control module, and the control module is used for setting a pressure critical value; the gas outlet end of the tested gas cylinder is output through the first regulation and control module, the first regulation and control module is connected to the control module in a controlled mode, and when the real-time pressure value is larger than the pressure critical value, the control module drives the first regulation and control module to work; the gas outlet end of the tested gas cylinder is output through the second regulation and control module; the second regulation and control module is in controlled connection with the control module, and when the real-time pressure value is smaller than the pressure critical value, the control module drives the second regulation and control module to work. The method has the effect of controlling the hydrogen desorption rate.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen cycle testing of vehicle-mounted hydrogen storage systems, and in particular to a hydrogen release rate control system and method for hydrogen cycle testing of vehicle-mounted hydrogen storage systems. Background Art

[0002] As the various technical problems of hydrogen fuel cell vehicles are gradually solved, the cost is greatly reduced, and the shortcomings in policies, regulations, and standards are gradually made up, major mainstream car manufacturers have entered the field of fuel cell vehicles. The demand for testing fuel cell vehicles and their components is also gradually increasing. As an important component of fuel cell vehicles, the testing of on-board hydrogen storage systems has gradually come into people's view.

[0003] The testing of the on-board hydrogen storage system mainly focuses on its hydrogen cycle test. The relevant standards have relatively general provisions on the key hydrogen release test in this test. The existing patent literature and other materials remain at the level of the entire test system and do not study the specific hydrogen release process. From the test standard requirements, the biggest control difficulty of the hydrogen release process lies in the control of the hydrogen release rate. Summary of the invention

[0004] In order to achieve control over the hydrogen release rate, the present application provides a hydrogen release rate control system and method for a hydrogen cycle test of an on-vehicle hydrogen storage system.

[0005] On the one hand, the present application provides a hydrogen release rate control system for a hydrogen cycle test of a vehicle-mounted hydrogen storage system, which adopts the following technical solution: A hydrogen release rate control system for a hydrogen cycle test of a vehicle-mounted hydrogen storage system, comprising: A gas cylinder to be tested, wherein a pressure sensor is arranged in the gas cylinder to be tested, and the pressure sensor is used to collect the real-time pressure value of the gas cylinder to be tested; A control module, wherein the output end of the pressure sensor is electrically connected to the input end of the control module, and the control module is used to set a critical pressure value; A first regulating module, the gas outlet of the tested gas cylinder is output through the first regulating module, the first regulating module is controllably connected to the control module, and when the real-time pressure value is greater than the pressure critical value, the control module drives the first regulating module to work; The second regulating module, the gas outlet of the tested gas cylinder is output through the second regulating module; the second regulating module is controllably connected to the control module, and when the real-time pressure value is less than the pressure critical value, the control module drives the second regulating module to work.

[0006] By adopting the above technical solution, the control module can select the appropriate first control module or second control module according to the real-time pressure value collected by the pressure sensor, wherein the first control module is responsible for regulating the hydrogen release rate of a large flow rate, while the second control module is responsible for regulating the hydrogen release rate of a small flow rate. This makes the hydrogen release process more flexible, which can not only meet the needs of large-flow hydrogen release, but also accurately control small-flow hydrogen release, thereby improving the accuracy and reliability of the test.

[0007] Preferably, the first control module includes a first driving gas solenoid valve, a first electronic pressure regulating valve, a first pneumatic control valve and a first data conversion module; the gas outlet end of the gas cylinder to be tested is connected to the gas inlet end of the first pneumatic control valve, and the gas outlet end of the first pneumatic control valve is set as the gas outlet end of the first control module; the first output end of the controller is electrically connected to the control end of the first driving gas solenoid valve, the external driving gas is input to the gas inlet end of the first driving gas solenoid valve, the gas delivery end of the first driving gas solenoid valve is connected to the gas inlet end of the first electronic pressure regulating valve, and the gas outlet end of the first electronic pressure regulating valve is connected to the control end of the first pneumatic control valve; the second output end of the control module is also electrically connected to the control end of the first electronic pressure regulating valve through the first data conversion module.

[0008] By adopting the above technical solution, the first output end of the control module is used to output the first valve opening signal, and the first driving gas solenoid valve opens after receiving the first valve opening signal. The second output end of the control module is used to output the target rate data, and the first data conversion module can perform data conversion and generate a corresponding driving signal after receiving the target rate data. The electronic control valve can adjust its own outlet pressure according to the received driving signal, and the outlet pressure corresponds to the opening of the first pneumatic control valve.

[0009] When the control module sets the target rate at which the first control module outputs hydrogen, a set opening corresponding to the set target rate can be obtained. After the electric pressure regulating valve controls the opening of the first pneumatic control valve to be equal to the set opening, the first electronic pressure regulating valve on the driving air pipeline stops regulating the pressure and maintains the current driving air pressure, and the opening of the first pneumatic control valve will also remain in the current state, thereby completing the rate control process.

[0010] Preferably, the second control module includes a second driving gas solenoid valve, a second electronic pressure regulating valve, a second pneumatic control valve and a second data conversion module; the gas outlet end of the gas cylinder to be tested is connected to the gas inlet end of the second pneumatic control valve, and the gas outlet end of the second pneumatic control valve is set as the gas outlet end of the second control module; the third output end of the controller is electrically connected to the control end of the second driving gas solenoid valve, the external driving gas is input to the gas inlet end of the second driving gas solenoid valve, the gas delivery end of the second driving gas solenoid valve is connected to the gas inlet end of the second electronic pressure regulating valve, and the gas outlet end of the second electronic pressure regulating valve is connected to the control end of the second pneumatic control valve; the fourth output end of the control module is also electrically connected to the control end of the second electronic pressure regulating valve through the second data conversion module.

[0011] By adopting the above technical solution, the third output end of the control module is used to output the second valve opening signal, and the second driving gas solenoid valve opens after receiving the second valve opening signal. The fourth output end of the control module is used to output the target speed data, and the second data conversion module can perform data conversion and generate a corresponding driving signal after receiving the target speed data. The electronic control valve can adjust its own outlet pressure according to the received driving signal, and the outlet pressure corresponds to the opening of the second pneumatic control valve.

[0012] When the control module sets the target rate at which the second control module outputs hydrogen, a set opening corresponding to the set target rate can be obtained. After the electric pressure regulating valve controls the opening of the second pneumatic control valve to be equal to the set opening, the second electronic pressure regulating valve on the driving air pipeline stops regulating the pressure and maintains the current driving air pressure, and the opening of the second pneumatic control valve will also remain in the current state, thereby completing the rate control process.

[0013] Preferably, the control module includes a database for storing the critical pressure values ​​under different volumes of the gas cylinders being tested and the hydrogen recovery modes after degassing; alternatively, the critical pressure value is directly set manually by an operator.

[0014] By adopting the above technical solution, it is possible to achieve accurate control of the hydrogen release rate for different volumes of gas cylinders being tested and hydrogen recovery methods after hydrogen release.

[0015] Preferably, a temperature sensor is further provided in the gas cylinder under test, the output end of the temperature sensor is electrically connected to the input end of the control module, and the temperature sensor is used to collect the real-time temperature value of the hydrogen cylinder under test.

[0016] By adopting the above technical solution, the temperature inside the gas cylinder to be tested can be detected by setting a temperature sensor.

[0017] Preferably, an alarm module is further included, wherein the output end of the control module is electrically connected to the input end of the alarm module, and the control module is also used to set a temperature alarm threshold and a pressure alarm threshold. When the real-time temperature value is greater than the temperature alarm threshold or the real-time pressure value is greater than the pressure alarm threshold, the control module outputs an alarm signal to the alarm module.

[0018] By adopting the above technical solution and setting an alarm device, it is possible to effectively prevent safety hazards caused by too low temperature or too low pressure in the hydrogen cylinder during the hydrogen discharge process.

[0019] Preferably, the alarm module includes an audible and visual alarm and an emergency stop button.

[0020] By adopting the above technical solution, after the alarm module receives the alarm signal, the sound and light alarm can emit an obvious sound and light alarm to alert the operator; and the operator can operate the emergency stop button to immediately cut off the power supply, stop the hydrogen release process, and ensure that the system is in a safe state.

[0021] Preferably, it further comprises a flow monitor, which is installed at the output channel of the first regulating module and the output channel of the second regulating module, and the flow monitor is connected to the controller signal.

[0022] By adopting the above technical solution, the flow monitor can transmit the collected flow data to the control module, so as to monitor the flow of the airflow output by the first control module and the second control module; when the deviation between the flow collected by the flow monitor and the target flow exceeds the allowable error value, the control module will immediately send out an alarm signal to remind the operator to deal with it in time, further ensuring the safety of the test process.

[0023] Preferably, it further comprises a hydrogen filling branch, the output channel of the hydrogen filling branch is connected to the output channel of the gas cylinder to be tested.

[0024] By adopting the above technical solution, the hydrogen filling branch can enable hydrogen to be quickly filled into the gas cylinder being tested.

[0025] On the other hand, the present application provides a method for controlling the hydrogen release rate of a hydrogen cycle test of a vehicle-mounted hydrogen storage system using the following technical solution: A method for controlling the hydrogen release rate of a hydrogen cycle test of a vehicle-mounted hydrogen storage system, based on the above-mentioned hydrogen release rate control system, comprises the following steps: Setting a critical pressure value through the control module and collecting the real-time pressure value in the tested gas cylinder; Comparing the real-time pressure value with the critical pressure value by the control module; If the real-time pressure value is greater than the pressure threshold value, the control module drives the first regulating module to operate; If the real-time pressure value is less than the critical pressure value, the control module drives the second regulating module to operate.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The control module selects the appropriate first control module or second control module according to the reading of the pressure sensor to achieve precise control of different hydrogen release rates, especially selecting the first control module with a large flow rate under high pressure and the second control module with a small flow rate under low pressure, which can effectively cope with changes in complex working conditions and improve the accuracy and flexibility of hydrogen release rate control; 2. The temperature and pressure in the hydrogen cylinder are monitored in real time through the temperature sensor and the pressure sensor, and the working state of the first control module or the second control module is dynamically adjusted according to the monitoring results; at the same time, the temperature and pressure in the cylinder are ensured to be within a safe range to avoid damage to the cylinder due to excessive temperature and pressure fluctuations, thereby improving the safety of the test; 3. The flow monitor monitors the regulated hydrogen emission rate in real time and feeds the signal back to the control module. When the deviation between the flow collected by the flow monitor and the target flow exceeds the allowable error value, the control module will immediately send out an alarm signal to remind the operator to deal with it in time, further ensuring the safety of the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a principle block diagram of Example 1 of the present application; Figure 2 This is a principle block diagram of the first control module in Example 1 of the present application; Figure 3 It is a principle block diagram of the second control module in Example 1 of the present application; Figure 4 This is a flow chart of Example 2 of the present application. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-4 This application is described in further detail.

[0029] Example 1 of the present application discloses a hydrogen release rate control system for a hydrogen cycle test of an on-vehicle hydrogen storage system.

[0030] Reference Figure 1A hydrogen release rate control system for a hydrogen cycle test of a vehicle-mounted hydrogen storage system includes a gas cylinder to be tested, a first control module, a second control module and a control module. The gas outlet end of the gas cylinder to be tested is connected to the gas inlet end of the first control module and the second control module, respectively. The gas outlet ends of the first control module and the second control module are interconnected and further connected to the back-end equipment. The first control module and the second control module are both controlled by the control module. Among them, the first control module is responsible for adjusting the hydrogen release rate of a large flow rate, while the second control module is responsible for adjusting the hydrogen release rate of a small flow rate, so that the hydrogen release rate can be flexibly adjusted according to needs to adapt to different test conditions and requirements.

[0031] A temperature sensor and a pressure sensor are also provided in the gas cylinder under test, and the output ends of the temperature sensor and the pressure sensor are electrically connected to the input end of the control module. The temperature sensor is used to collect the real-time temperature value in the gas cylinder under test, and the pressure sensor is used to collect the real-time pressure value in the gas cylinder under test. The control module is used to receive the collected temperature data and pressure data.

[0032] Preferably, the embodiment of the present application may also include an alarm device, and the output end of the control module is electrically connected to the input end of the alarm module, and the alarm device may include an audible and visual alarm and an emergency stop button. The temperature alarm threshold and the pressure alarm threshold can be set by the control module. When the temperature in the gas cylinder being tested is lower than the temperature alarm threshold or the pressure in the gas cylinder being tested is lower than the pressure alarm threshold, the control module outputs an alarm signal to the alarm module. After the alarm module receives the alarm signal, the audible and visual alarm can emit an obvious audible and visual alarm to alert the operator; and the operator can operate the emergency stop button to immediately cut off the power supply, stop the hydrogen discharge process, and ensure that the system is in a safe state.

[0033] The pressure critical value can be set through the control module. When the real-time pressure value collected is greater than the pressure critical value, the control module opens the first control module and closes the second control module to achieve large-flow hydrogen release rate regulation; when the real-time pressure value collected is less than the pressure critical value, the control module opens the second control module and closes the first control module to achieve small-flow hydrogen release rate regulation.

[0034] Specifically, the control module includes a database, which is used to store the critical pressure values ​​under different volumes of gas cylinders under test and hydrogen recovery methods after hydrogen discharge, so as to adapt to gas cylinders of different specifications and different hydrogen discharge requirements, ensuring the efficiency and safety of the hydrogen discharge process. The control module can also automatically recommend the critical pressure value based on historical test data, or allow the user to manually set the critical pressure value. For example, the control module can automatically optimize the set value of the critical pressure value based on historical test data through a machine learning algorithm, making the hydrogen discharge process more efficient and safe. In addition, the control module can also allow the operator to manually set the critical pressure value through the user interface to meet special test requirements.

[0035] On this basis, the output end of the first control module and the output end of the second control module are also equipped with a flow monitor, and the flow of the airflow output by the first control module and the second control module can be monitored by setting the flow monitor. The output end signal of the flow monitor is connected to the input end of the controller, so that the collected flow data can be transmitted to the control module. In addition, the collected flow information can also be displayed on the user interface, so that relevant personnel can obtain flow information in real time, and can promptly remind relevant personnel when abnormal flow information occurs.

[0036] The embodiment of the present application further includes a hydrogen filling branch, the output end of which is connected to the connecting pipe between the gas cylinder to be tested and the first control module and the second control module. The hydrogen filling branch provides a direct path so that hydrogen can be quickly filled into the gas cylinder to be tested.

[0037] Reference Figure 2 , the first control module includes a first driving gas solenoid valve, a first electronic pressure regulating valve, a first pneumatic control valve and a first data conversion module. The gas outlet end of the gas cylinder to be tested is connected to the gas inlet end of the first pneumatic control valve, and the gas outlet end of the first pneumatic control valve is set as the gas outlet end of the first control module. The first output end of the controller is electrically connected to the control end of the first driving gas solenoid valve, the external driving gas is input to the gas inlet end of the first driving gas solenoid valve, the gas supply end of the first driving gas solenoid valve is connected to the gas inlet end of the first electronic pressure regulating valve, and the gas outlet end of the first electronic pressure regulating valve is connected to the control end of the first pneumatic control valve. In addition, the second output end of the control module is also electrically connected to the control end of the first electronic pressure regulating valve through the first data conversion module.

[0038] The first output end of the control module is used to output the first valve opening signal. The first driving gas solenoid valve opens after receiving the first valve opening signal, so that the air inlet end of the first electronic pressure regulating valve can be connected to the external driving gas. The second output end of the control module is used to output the target rate data. After receiving the target rate data, the first data conversion module can perform data conversion and generate a corresponding driving signal. The electronic control valve can adjust its own outlet pressure according to the received driving signal, and the outlet pressure corresponds to the opening of the first pneumatic control valve. By accurately controlling the opening of the first pneumatic control valve, continuous regulation of the pipeline flow can be achieved, thereby achieving accurate control of the hydrogen release rate. During the change of the opening of the first pneumatic control valve, its valve flow cross-sectional area changes continuously, and the corresponding pipeline flow changes continuously. The corresponding relationship curve between the opening and the pipeline flow can be obtained through experimental data and stored in the database of the control module.

[0039] When the control module sets the target rate at which the first control module outputs hydrogen, a set opening corresponding to the set target rate can be obtained. After the electric pressure regulating valve controls the opening of the first pneumatic control valve to be equal to the set opening, the first electronic pressure regulating valve on the driving air pipeline stops regulating the pressure and maintains the current driving air pressure, and the opening of the first pneumatic control valve will also remain in the current state, thereby completing the rate control process.

[0040] refer to Figure 2 and Figure 3 The second control module has the same structure as the first control module, including a second driving gas solenoid valve, a second electronic pressure regulating valve, a second pneumatic control valve and a second data conversion module. The difference is that the flow capacity of the second pneumatic control valve is smaller than that of the first pneumatic control valve, so that it can adapt to low-speed regulation and meet the requirements of speed regulation accuracy.

[0041] The implementation principle of the hydrogen release rate control system of a hydrogen cycle test of a vehicle-mounted hydrogen storage system in Example 1 of the present application is as follows: by setting a temperature sensor and a pressure sensor, the temperature and pressure changes in the hydrogen bottle can be monitored in real time to ensure that the gas cylinder operates within a safe range. The first control module and the second control module are responsible for the regulation of large flow and small flow hydrogen release rates, respectively, to ensure that precise control can be achieved throughout the hydrogen release process. By setting a flow monitor, the regulated hydrogen emission rate can be fed back in real time, so that the control module can adjust the control strategy in time. Through these measures, this embodiment effectively solves the problem of hydrogen release rate control, improves the efficiency and safety of the test, and provides strong support for the development and testing of fuel cell vehicles.

[0042] Example 2 of the present application discloses a method for controlling the hydrogen release rate of a hydrogen cycle test of an on-vehicle hydrogen storage system.

[0043] Reference Figure 4 A method for controlling the hydrogen release rate of a hydrogen cycle test of a vehicle-mounted hydrogen storage system comprises the following steps: S1: Set the critical pressure value through the control module and collect the real-time pressure value in the tested gas cylinder.

[0044] S2: Compare the real-time pressure value with the critical pressure value through the control module. If the real-time pressure value is greater than the critical pressure value, jump to S3; if the real-time pressure value is less than the critical pressure value, jump to S4. S3: The control module drives the first regulating module to operate, thereby achieving regulation of a large flow rate of hydrogen release.

[0045] S4: The control module drives the second regulating module to operate, thereby achieving regulation of the hydrogen release rate at a small flow rate.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A hydrogen release rate control system for a hydrogen cycle test of a vehicle-mounted hydrogen storage system, characterized in that: include: A gas cylinder to be tested, wherein a pressure sensor is arranged in the gas cylinder to be tested, and the pressure sensor is used to collect the real-time pressure value of the gas cylinder to be tested; A control module, wherein the output end of the pressure sensor is electrically connected to the input end of the control module, and the control module is used to set a critical pressure value; A first regulating module, the gas outlet of the tested gas cylinder is output through the first regulating module, the first regulating module is controllably connected to the control module, and when the real-time pressure value is greater than the pressure critical value, the control module drives the first regulating module to work; A second regulating module, through which the gas outlet of the gas cylinder under test is output; The second regulating module is controllably connected to the control module. When the real-time pressure value is less than the critical pressure value, the control module drives the second regulating module to operate.

2. The hydrogen release rate control system for a hydrogen cycle test of a vehicle-mounted hydrogen storage system according to claim 1, characterized in that: The first control module includes a first driving gas solenoid valve, a first electronic pressure regulating valve, a first pneumatic control valve and a first data conversion module; the gas outlet end of the gas cylinder to be tested is connected to the gas inlet end of the first pneumatic control valve, and the gas outlet end of the first pneumatic control valve is set as the gas outlet end of the first control module; the first output end of the controller is electrically connected to the control end of the first driving gas solenoid valve, the external driving gas is input to the gas inlet end of the first driving gas solenoid valve, the gas transmission end of the first driving gas solenoid valve is connected to the gas inlet end of the first electronic pressure regulating valve, and the gas outlet end of the first electronic pressure regulating valve is connected to the control end of the first pneumatic control valve; the second output end of the control module is also electrically connected to the control end of the first electronic pressure regulating valve through the first data conversion module.

3. The hydrogen release rate control system for a hydrogen cycle test of a vehicle-mounted hydrogen storage system according to claim 1, characterized in that: The second control module includes a second driving gas solenoid valve, a second electronic pressure regulating valve, a second pneumatic control valve and a second data conversion module; the gas outlet end of the gas cylinder to be tested is connected to the gas inlet end of the second pneumatic control valve, and the gas outlet end of the second pneumatic control valve is set as the gas outlet end of the second control module; the third output end of the controller is electrically connected to the control end of the second driving gas solenoid valve, the external driving gas is input to the gas inlet end of the second driving gas solenoid valve, the gas transmission end of the second driving gas solenoid valve is connected to the gas inlet end of the second electronic pressure regulating valve, and the gas outlet end of the second electronic pressure regulating valve is connected to the control end of the second pneumatic control valve; the fourth output end of the control module is also electrically connected to the control end of the second electronic pressure regulating valve through the second data conversion module.

4. The hydrogen release rate control system for a hydrogen cycle test of a vehicle-mounted hydrogen storage system according to claim 1, characterized in that: The control module includes a database, which is used to store the critical pressure values ​​under different volumes of the gas cylinders being tested and the hydrogen recovery modes after dehydrogenation; or, the critical pressure value is directly set manually by an operator.

5. The hydrogen release rate control system for a hydrogen cycle test of a vehicle-mounted hydrogen storage system according to claim 1, characterized in that: A temperature sensor is also provided in the gas cylinder under test, and the output end of the temperature sensor is electrically connected to the input end of the control module. The temperature sensor is used to collect the real-time temperature value of the hydrogen cylinder under test.

6. The hydrogen release rate control system for a hydrogen cycle test of a vehicle-mounted hydrogen storage system according to claim 5, characterized in that: It also includes an alarm module, the output end of the control module is electrically connected to the input end of the alarm module, and the control module is also used to set a temperature alarm threshold and a pressure alarm threshold. When the real-time temperature value is greater than the temperature alarm threshold or the real-time pressure value is greater than the pressure alarm threshold, the control module outputs an alarm signal to the alarm module.

7. The hydrogen release rate control system for a hydrogen cycle test of a vehicle-mounted hydrogen storage system according to claim 6, characterized in that: The alarm module includes an audible and visual alarm and an emergency stop button.

8. The hydrogen release rate control system for a hydrogen cycle test of a vehicle-mounted hydrogen storage system according to claim 1, characterized in that: It also includes a flow monitor, which is installed on the output channel of the first regulation module and the output channel of the second regulation module, and the flow monitor is connected to the controller signal.

9. The hydrogen release rate control system for a hydrogen cycle test of a vehicle-mounted hydrogen storage system according to claim 1, characterized in that: It also includes a hydrogen filling branch, and the output channel of the hydrogen filling branch is connected to the output channel of the gas cylinder to be tested.

10. A method for controlling the hydrogen release rate of a hydrogen cycle test of a vehicle-mounted hydrogen storage system, characterized in that: The hydrogen release rate control system according to claims 1 to 9 comprises the following steps: Setting a critical pressure value through the control module and collecting the real-time pressure value in the tested gas cylinder; Comparing the real-time pressure value with the critical pressure value by the control module; If the real-time pressure value is greater than the pressure threshold value, the control module drives the first regulating module to operate; If the real-time pressure value is less than the critical pressure value, the control module drives the second regulating module to operate.

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