Device for testing filling performance of hydrogen filling machine

Abstract

The utility model discloses a device for testing the filling performance of a hydrogenation machine, and mainly solves the problems of high testing cost, high testing risk and incomplete testing results caused by the fact that various actual testing environments need to be set up in the conventional performance testing of the hydrogenation machine. The regulating valve signal input interface is used for acquiring a control output signal of a regulating valve of the hydrogen adding machine; the CHSS simulation main control unit is in communication connection with the regulating valve signal input interface and correspondingly calculates real-time CHSS filling flow velocity and accumulation as well as real-time temperature and pressure based on the acquired control output signal of the regulating valve of the hydrogen adding machine; the flow meter signal output interface, the environment temperature output interface and the pressure output interface are respectively in communication connection with the CHSS simulation main control unit and are used for correspondingly outputting a filling flow and accumulation signal, an environment temperature change signal and a hydrogenation gun pressure change signal to a hydrogenation machine. The device can be used for efficiently and safely testing the filling performance of the hydrogenation machine at low cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of new energy refueling equipment, in particular to a hydrogen refueling machine refueling performance testing device. BACKGROUND

[0002] The hydrogen refueling machine is a device for refueling hydrogen for fuel cell vehicles. Its working environment is complex, involving high-pressure gas transmission and control. Therefore, the detection of its safety, performance and precision is particularly important.

[0003] During the refueling process of the hydrogen refueling machine, it is generally desired that the refueling speed be as fast as possible to shorten the hydrogen refueling effect and thus improve the operation efficiency of the hydrogen refueling station. However, in the actual hydrogen refueling process, the hydrogen refueling speed is affected by factors such as the hydrogen temperature of the hydrogen refueling station, the ambient temperature of the refueling, the temperature of the on-board high-pressure hydrogen storage container (CHSS), the pressure of the on-board high-pressure hydrogen storage container (CHSS), and the volume of the on-board high-pressure hydrogen storage container (CHSS). Based on the relevant provisions of the SAE-J2601 international standard, the hydrogen refueling speed needs to be limited within the maximum safe refueling speed to ensure refueling safety.

[0004] Therefore, during the refueling performance testing and verification of the hydrogen refueling machine, it is necessary to test and verify whether the hydrogen refueling machine meets the relevant standards. During the refueling performance testing and verification of the hydrogen refueling machine, the temperature, pressure and volume of the on-board high-pressure hydrogen storage container (CHSS), as well as the hydrogen temperature of the hydrogen refueling station and the ambient temperature of the refueling, need to be changed to ensure that the hydrogen refueling machine meets the requirements of the relevant standards under various environments. However, the test operation is usually carried out in the factory area, and the test environment temperature and CHSS volume are relatively difficult to adjust as needed. According to the current test requirements, 87.5MPa high-pressure hydrogen gas needs to be used, which not only has high pressure but also is flammable and explosive, resulting in extremely harsh requirements for the test environment. It is difficult to set up a high-pressure test environment in the factory area, which leads to high test cost, high test risk, and incomplete test results due to the limitation of test conditions.

[0005] The information disclosed in this BACKGROUND section is only for the purpose of enhancing the understanding of the background of the present disclosure and should not be taken as admitting that such information is prior art known to those of ordinary skill in the art. SUMMARY

[0006] In view of at least one of the above technical problems, the present disclosure provides a hydrogen refueling machine refueling performance testing device, which aims to solve the problem that the existing hydrogen refueling machine performance testing needs to set up various actual test environments, resulting in high test cost, high test risk and incomplete test results.

[0007] According to one aspect of the present disclosure, a hydrogen dispenser refueling performance testing device is provided, which comprises an adjusting valve signal input interface for obtaining a hydrogen dispenser adjusting valve control output signal, a CHSS simulation master unit in communication connection with the adjusting valve signal input interface and corresponding calculation of CHSS real-time refueling flow rate and accumulation and real-time temperature and pressure based on the obtained hydrogen dispenser adjusting valve control output signal, a flow meter signal output interface in communication connection with the CHSS simulation master unit respectively and for corresponding output of refueling flow and accumulation signals, ambient temperature variation and hydrogen gun pressure variation signals to a hydrogen dispenser, an ambient temperature output interface and a pressure output interface.

[0008] In some embodiments of the present disclosure, the hydrogen dispenser refueling performance testing device further comprises a display module and a parameter setting module in communication connection with the CHSS simulation master unit.

[0009] In some embodiments of the present disclosure, the parameter setting module comprises an adjustable resistor in corresponding electrical connection with a corresponding input terminal of the CHSS simulation master unit.

[0010] In some embodiments of the present disclosure, the hydrogen dispenser refueling performance testing device further comprises an upper computer communication unit in corresponding communication connection with the CHSS simulation master unit for setting test initial data by an upper computer.

[0011] In some embodiments of the present disclosure, the adjusting valve signal input interface, the flow meter signal output interface, the ambient temperature output interface and the pressure output interface are respectively in corresponding communication connection with an adjusting valve control output interface, a flow meter reading interface, an ambient temperature input interface and a pressure variation input interface of a hydrogen dispenser.

[0012] In some embodiments of the present disclosure, the hydrogen dispenser refueling performance testing device further comprises an infrared communication module in communication connection with the CHSS simulation master unit and for corresponding transmission of CHSS volume, pressure and temperature information to a hydrogen dispenser by infrared communication.

[0013] The one or more technical solutions provided in the embodiments of the present disclosure have at least the following technical effects or advantages:

[0014] The hydrogen dispenser refueling performance testing device simulates an actual CHSS, receives output signals of a hydrogen dispenser, and calculates in real time variation information of hydrogen parameters at the CHSS under corresponding CHSS initial parameters according to the output signals, and feeds back to the hydrogen dispenser as a control basis for regulating valves and other components of the hydrogen dispenser, thereby eliminating the need to build an actual test environment, focusing on obtaining, simulating and feeding back output signals of the hydrogen dispenser, thereby verifying the refueling performance of the hydrogen dispenser and determining whether its refueling control meets corresponding specification standards, which can greatly reduce testing costs and safety risks caused by the presence of high-pressure hydrogen storage and flow during the testing process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the hydrogen refueling performance testing device in one embodiment of this application.

[0016] Figure 2 This is a partial circuit diagram of the regulating valve signal input interface in one embodiment of this application.

[0017] Figure 3 This is a partial circuit schematic diagram of the parameter setting module in one embodiment of this application. Detailed Implementation

[0018] The programs involved or relied upon in the following embodiments are all conventional or simple programs in this technical field. Those skilled in the art can make conventional choices or adaptive adjustments according to specific application scenarios.

[0019] To better understand the technical solution of this application, the above technical solution will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Existing hydrogen refueling performance testing requires the construction of a dedicated testing environment within the factory premises. This environment includes different grades of high-pressure hydrogen and various volumes of on-board high-pressure hydrogen storage containers (CHSS). Furthermore, it necessitates controlling parameters such as CHSS temperature, pressure, and ambient temperature to comprehensively and effectively verify the refueling performance. However, constructing this testing environment is extremely costly and requires significant manpower and resources. Controlling environmental parameters is also difficult, and substantial safety hazards exist during hydrogen storage and refueling testing. Therefore, this paper discloses a hydrogen refueling performance testing device to achieve safe and efficient hydrogen refueling performance testing.

[0021] Overall, to address the high testing costs and safety risks associated with setting up actual testing environments, and considering that the performance of a hydrogen dispenser is primarily reflected in the stability and reliability of its components, such as the regulating valve, the present invention discloses a hydrogen dispenser performance testing device. This device simulates the CHSS (Chemical Surface Mount System) to receive the output signal from the hydrogen dispenser. Based on this output signal, it calculates the changes in hydrogen parameters at the CHSS under the corresponding initial CHSS parameters in real time and feeds this information back to the hydrogen dispenser as the basis for controlling its regulating valve and other components. This eliminates the need for setting up an actual testing environment, focusing instead on acquiring, simulating, and feeding back the hydrogen dispenser's output signal to verify its dispensing performance and determine whether its dispensing control meets the relevant standards and specifications.

[0022] Specifically refer to Figure 1 In the embodiment, the hydrogen filling performance test device of the hydrogen filling machine comprises a CHSS simulation master unit. The CHSS simulation master unit obtains the control signal of the adjusting valve of the hydrogen filling machine, simulates and calculates the change of the hydrogen filling parameter of the CHSS under the initial setting of the CHSS based on the control signal, and feeds back the parameter to the hydrogen filling machine as the control basis of the control and adjustment of the adjusting valve and other components of the hydrogen filling machine. In the embodiment, the CHSS simulation master unit adopts a single-chip microcomputer. In order to realize the obtaining of the adjusting valve information of the hydrogen filling machine by the CHSS simulation master unit, the corresponding I / O port of the CHSS simulation unit is communicatively connected with an adjusting valve signal input interface. The other end of the adjusting valve signal input interface is communicatively connected with the adjusting valve control output interface of the hydrogen filling machine during the test, so as to obtain the control information of the adjusting valve of the hydrogen filling machine, and thus the filling flow rate and the cumulative filling amount of hydrogen are simulated and calculated in real time based on the control information of the adjusting valve. Therefore, during the actual test, the CHSS container and the high-pressure hydrogen source can be avoided to be actually set, the cost investment is reduced, and the safety hazard of setting the high-pressure hydrogen storage container in the factory area is eliminated.

[0023] Further, the I / O port of the CHSS simulation master unit is also communicatively connected with a flowmeter signal output interface. The interface is used to be connected with the flowmeter reading interface of the hydrogen filling machine, so that the actual flowmeter is avoided to be set during the test to realize the measurement of the hydrogen filling amount. Specifically, after the CHSS simulation master unit obtains the adjusting valve control output signal of the hydrogen filling machine based on the adjusting valve signal input interface and real-time calculates the hydrogen filling flow rate and the cumulative filling amount, the filling flow rate and the cumulative signal are directly transmitted to the flowmeter reading interface of the hydrogen filling machine through the flowmeter signal output interface, and then the hydrogen filling machine master unit further controls the adjusting valve control signal based on the flowmeter feedback information according to the filling requirements, so as to realize the closed-loop feedback. In this process, the actual test environment does not need to be built, and the actual filling environment can be simulated only by receiving, simulating and feeding back the signal.

[0024] Referring to Figure 2 Considering that there is a difference between the adjusting valve control output signal of the hydrogen filling machine and the input and output signals of the CHSS simulation master unit, a signal conversion chip is arranged to realize the signal conversion. Figure 2 Part of the circuit schematic diagram of the adjusting valve signal input interface is shown in the figure. The RS485 signal on the right side is converted into the TTL level signal on the left side through the signal conversion chip U4 to be input to the corresponding I / O port of the CHSS simulation master unit. The J4 port is used to be communicatively connected with the adjusting valve control output interface of the hydrogen filling machine. Similarly, the flowmeter signal output interface also comprises a signal conversion chip, which is used to convert the TTL level signal output by the CHSS simulation master unit into the RS485 signal acceptable by the flowmeter reading interface of the hydrogen filling machine.

[0025] Further, in the process of hydrogen filling machine filling control, considering the ambient temperature as an important parameter of the hydrogen filling machine participating in the hydrogen filling control, the ambient temperature has an important influence on the filling performance of the hydrogen filling machine. In the test, the ambient temperature needs to be adjusted in the range of-40℃ to 50℃. Therefore, referring to Figure 1 , the corresponding I\O port communication connection of the CHSS simulation master control unit has an ambient temperature output interface, which is used for corresponding communication connection with the ambient temperature input interface of the hydrogen filling machine; thereby, by setting the ambient temperature before testing, the ambient temperature output interface is used to deliver to the hydrogen filling machine master control unit to participate in the control of the hydrogen filling machine.

[0026] In this embodiment, the regulating valve is a pressure regulating valve. After the CHSS simulation master control unit receives the regulating valve control signal output by the hydrogen filling machine, the corresponding simulation calculates the gun pressure variable signal of the hydrogen filling gun, and transmits the pressure variable information to the pressure variable input interface of the hydrogen filling machine through the pressure output interface, so as to participate in the regulation and control of the regulating valve of the hydrogen filling machine. Similarly, the pressure output interface and the ambient temperature output interface also respectively include a signal conversion chip, which is used to convert the TTL level signal at the CHSS simulation master control unit into an RS485 signal readable by the hydrogen filling machine. In other embodiments, the regulating valve is a proportional valve, and then the filling simulation process of the flow rate of different valve bodies is different. In order to realize the preset of the initial parameters, the CHSS simulation master control unit in this embodiment includes a dial switch, which is used to set whether to use infrared communication, set the type of the regulating valve, and the like.

[0027] In order to realize the initial setting of the CHSS and the ambient temperature and the like, the hydrogen filling performance test device in this embodiment further includes a display module and a parameter setting module. The CHSS volume, the CHSS initial pressure, the CHSS initial temperature, and the ambient temperature and the like are set through the parameter setting module, and the parameter setting and process parameter information is displayed through the display module. Referring to Figure 3 , the parameter setting module includes a plurality of variable resistors. The ADC_CH0 terminal is used for corresponding electrical connection with the I\O of the CHSS master control unit, so as to realize the adjustment of the initial parameters. In which, Figure 3 , the variable resistor is a sliding resistor RV3. The resistance value in the circuit is changed through the sliding resistor, so as to realize the adjustment of the modulus. The resistor R91 is used to prevent short circuit when the sliding resistor is adjusted to the minimum value. The capacitor C45 is a filter capacitor, which is used to prevent the analog signal output from jumping greatly. Thus, by setting a plurality of Figure 3 circuit as shown in the figure, the adjustment of the initial parameters of the CHSS and the ambient temperature and the like is realized.

[0028] In addition, in this embodiment, in order to enrich the regulation and control mode of the initial parameters of the CHSS simulation master control unit and facilitate the remote regulation and control of the test device, referring to Figure 2The CHSS simulation master control unit further comprises a host computer communication interface for communication connection with the host computer, so that the host computer can set information such as the CHSS volume, the CHSS initial pressure, the CHSS initial temperature and the ambient temperature, and can obtain real-time simulation information of the CHSS simulation master control unit and read the regulating valve control information output by the hydrogen filling machine. In addition, based on the data transmitted by the CHSS simulation master control unit, the host computer can record and draw parameter curves, which serve as an important basis for performance evaluation of the hydrogen filling machine.

[0029] After the initial parameters are set through the host computer or the parameter setting module, the set information is output to the hydrogen filling machine to participate in the filling control of the hydrogen filling machine. In the embodiment, refer to Figure 1 The CHSS simulation master control unit is further communicatively connected with a CHSS infrared communication module for establishing a wireless communication connection with an infrared communication module of the hydrogen filling machine, which is equivalent to an infrared communication unit of the actual CHSS container for establishing an infrared communication connection with the hydrogen filling machine, and is used to transmit information such as the CHSS volume, the pressure and the temperature. In other embodiments, the CHSS simulation master control unit does not establish an infrared communication connection with the hydrogen filling machine, so that the hydrogen filling machine can only obtain the CHSS initial pressure through the pressure output interface of the test device and reduce the CHSS filling rate, and calculate the CHSS volume based on the change amount of the CHSS pressure signal.

[0030] When the hydrogen filling performance test device is used, after each interface of the test device is connected to each interface of the hydrogen filling machine and the hydrogen filling machine is started, the test is started by sending a relay DO signal to the CHSS simulation master control unit. At this time, the CHSS simulation master control unit simulates the flowmeter data based on the received regulating valve control signal and the flowmeter flow and cumulative value, and sends the flowmeter signal output interface to the hydrogen filling machine. The hydrogen filling machine adjusts the regulating valve control signal according to the received flow signal to realize closed-loop control. During the filling process, the CHSS pressure and temperature gradually increase. The CHSS simulation master control unit calculates the CHSS simulation pressure and temperature in real time based on the initially set hydrogen temperature, CHSS initial information and flow information, and transmits the CHSS simulation pressure and temperature to the hydrogen filling machine through the infrared signal. The hydrogen filling machine needs to judge and process the CHSS simulation pressure and temperature, and the result is reflected on the regulating valve signal output. During this process, the CHSS simulation master control unit outputs a corresponding signal to the pressure variable input interface of the hydrogen filling machine based on the received regulating valve signal. The hydrogen filling machine controls the pressure regulating valve according to the received pressure variable signal. The CHSS simulation master control unit calculates the flow signal based on the pressure variable signal, the real-time pressure of the CHSS and the pipeline resistance parameters of the hydrogen filling machine, and feeds back the flow signal to the hydrogen filling machine through the flowmeter.

[0031] While there have been described herein the preferred embodiments of the present application, various modifications and changes can be suggested to one skilled in the art, and it is intended that the application be construed as including all such modifications and changes as fall within the scope of the application.

[0032] It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application cover the modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

Claims

1. A refueling performance test apparatus for a hydrogen refueling machine, characterized by comprising: The CHSS simulation main control unit is connected with the regulating valve signal input interface and calculates the real-time filling flow rate and the cumulative value of the CHSS based on the obtained hydrogenation machine regulating valve control output signal, and the CHSS simulation main control unit is connected with the flowmeter signal output interface, the environment temperature output interface and the pressure output interface.

2. The fuel dispenser dispensing performance test apparatus of claim 1, wherein, The display module and the parameter setting module are connected with the CHSS simulation main control unit.

3. The fuel dispenser dispensing performance test apparatus of claim 2, wherein, The parameter setting module comprises an adjustable resistor which is connected with the corresponding input terminal of the CHSS simulation main control unit.

4. The fueling performance test apparatus of claim 1, wherein The host computer communication unit is connected with the CHSS simulation main control unit and is used for setting the test initial data.

5. The fueling performance test apparatus of claim 1, wherein, The regulating valve signal input interface, the flowmeter signal output interface, the environment temperature output interface and the pressure output interface are connected with the regulating valve control output interface, the flowmeter reading interface, the environment temperature input interface and the pressure variable input interface of the hydrogenation machine respectively.

6. The fueling performance test apparatus of claim 1, wherein, The infrared communication module is connected with the CHSS simulation main control unit and is used for transmitting the CHSS volume, pressure and temperature information to the hydrogenation machine through infrared communication.

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