Device and method for detecting filling function of hydrogen refueling station

Abstract

The invention provides a refueling station filling function detection device and method. The device comprises an operation control module, a vehicle-mounted hydrogen storage simulation module, a hydrogen diffusion module, a hydrogen supply module, a nitrogen purging module, a hydrogen replacement module, a weighing metering module and a skid-mounted carrying module. The operation control module comprises a control unit and an operation panel, different control signals are generated according to the requirements of workers, and the vehicle-mounted hydrogen storage simulation module is used for simulating vehicle-mounted hydrogen storage systems of different vehicle types and is connected with a hydrogen filling port of the hydrogen supply module through a main filling pipeline; the nitrogen purging module and the hydrogen replacement module are connected with the main pipeline through a pressure regulating valve and a one-way valve; the hydrogen diffusing module is connected with the main pipeline through a stop valve, and hydrogen in the pipeline of the device is vented through a flame arrester. By adopting the device, the problems of complicated operation and easy damage to equipment in a station in the existing detection technology are solved, the pressure and temperature of related media are detected in real time by adopting an automatic detection technology, and the filling function and metering of the hydrogen filling machine are monitored.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen energy safety engineering detection and evaluation, and in particular to a hydrogen filling station filling function detection device and method. Background Art

[0002] With the development of social economy, high-pressure gaseous energy technology has been widely promoted and utilized, especially hydrogen energy, which plays an important role in the future energy structure; safe and efficient hydrogen storage, hydrogen transmission and hydrogenation are one of the key technologies for large-scale utilization of hydrogen energy. The three main hydrogen storage methods suitable for commercial requirements are high-pressure hydrogen storage, liquid hydrogen storage and transportation, and metal hydride hydrogen storage. Among them, high-pressure room-temperature hydrogen storage and transmission have attracted much attention due to their advantages such as simple equipment structure, low energy consumption for compressed hydrogen preparation, and fast filling and discharge speed. They are currently the dominant hydrogen energy storage and transportation methods.

[0003] The hydrogen refueling process involves repeated connection and communication matching between the hydrogen refueling machine and the onboard hydrogen storage system of the fuel cell vehicle. Different hydrogen fuel cell vehicle manufacturers have different structural forms and layouts of hydrogen refueling ports and related accessories. After the construction of the hydrogen refueling station is completed, it is necessary to meet the refueling needs of different types of vehicles. This requires different types of vehicles to go to the station for refueling function verification, which is time-consuming and labor-intensive. In addition, the hydrogen refueling process of hydrogen refueling stations / oil-hydrogen combined stations has high operational risks. During the refueling process of fuel cell vehicles in the station, the hydrogen refueling machine, the onboard hydrogen storage system, etc. may fail or the control logic fails, causing the onboard hydrogen storage system to refuel too quickly, overheat, or overcharge and overpressure, which in turn causes large-scale hydrogen leakage.

[0004] On the other hand, the hydrogen filling process of hydrogen refueling stations / oil-hydrogen combined stations has high requirements on the quality accuracy of hydrogen filling. If the filling performance accuracy is insufficient, inaccurate measurement or failures may occur during service, thus causing trade disputes. At the same time, if the method of regular calibration and approval is adopted, the equipment and mass flow meter need to be repeatedly disassembled and assembled, which may easily cause irreversible damage to structures such as threaded connectors, posing a huge safety hazard. It can be seen that in order to effectively and safely realize the large-scale construction of hydrogen refueling stations, reliable safety acceptance and quality inspection of the filling function will become a key issue.

[0005] It can be seen that although the existing technology has standardized the refueling protocol and communication standards for hydrogen refueling machines, the current existing technology is mostly focused on the design and improvement of individual modules, lacks overall detection and verification technology, and cannot achieve a systematic and easy-to-use overall detection of the refueling function of the hydrogen refueling station.

[0006] The information disclosed in the background technology section of the present invention is only intended to deepen the understanding of the general background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to those skilled in the art. Summary of the invention

[0007] In order to solve the above problems, the present invention provides a hydrogen filling station filling function detection device, which can effectively overcome the problems of complicated operation of existing detection technology and easy damage to the equipment in the station, and adopts automatic detection technology to detect the pressure and temperature of related media in real time, so as to realize the monitoring of the filling function and metering of the hydrogen filling machine; In a preferred embodiment, the device includes: an operation control module, an on-board hydrogen storage simulation module, a hydrogen release module, a hydrogen supply module, a nitrogen purge module, a hydrogen replacement module, a weighing and metering module and a skid-mounted carrier module;

[0008] The operation control module includes a control unit and an operation panel, on which are integrated display instruments for the hydrogenation port, a built-in infrared emitter of the hydrogenation port, key valves, and a touch interactive screen;

[0009] The operation panel and the control unit are connected in communication, and the operation panel and the control unit cooperate to generate different control signals according to the needs of the staff;

[0010] The control unit is communicatively connected with a hydrogen storage controller of a hydrogen filling function detection device of a hydrogen filling station under test;

[0011] The on-board hydrogen storage simulation module is used to simulate the on-board hydrogen storage system of different vehicle models, and is connected to the hydrogen filling port of the hydrogen supply module through the filling main line. The on-board hydrogen storage simulation module is equipped with a hydrogen storage bottle group, a hydrogen storage bottle installation frame, and a hydrogen storage controller;

[0012] The nitrogen purge module and the hydrogen replacement module are connected to the main pipeline via a pressure regulating valve and a second one-way valve;

[0013] The hydrogen release module is connected to the main pipeline via a stop valve and is configured to use a flame arrester to release hydrogen in the device pipeline.

[0014] Preferably, in one embodiment, the hydrogenation port comprises one or more 35MPa hydrogenation ports and one or more 70MPa hydrogenation ports, the 35MPa hydrogenation ports and the 70MPa hydrogenation ports are arranged in parallel pipelines, and each hydrogenation port adopts an independent output pipeline and is independently provided with a shut-off valve.

[0015] Furthermore, in one embodiment, a main pipe between the hydrogen filling port and the on-board hydrogen storage simulation module is provided with a hydrogen filling port output stop valve, a first one-way valve (7) and a filter (8) in sequence;

[0016] The first one-way valve is used to prevent the 70MPa high-pressure hydrogen from flowing back to the 35MPa hydrogenation port; the filter is used to filter impurities in the hydrogen.

[0017] In an optional embodiment, the on-board hydrogen storage simulation module is also configured with a mass flow meter, which is connected to the output end of the filter and includes a 35MPa mass flow meter and a 70MPa mass flow meter.

[0018] In one embodiment, the 35 MPa mass flowmeter and the 70 MPa mass flowmeter are arranged through parallel pipelines, and stop valves are independently arranged at the input ends of the respective pipelines.

[0019] Furthermore, in one embodiment, the on-board hydrogen storage simulation module is also configured with a pressure gauge (13) and a temperature sensor (14), and the hydrogen storage bottle group is connected to the output end of the mass flow meter via the temperature sensor and the pressure gauge. During the test, the pressure and temperature of the hydrogen storage bottle group are monitored in real time, so that when the pressure or temperature is abnormal, the hydrogen release module is started to release the hydrogen in the hydrogen storage bottle group and the pipeline.

[0020] In actual application, in one embodiment, the vehicle-mounted hydrogen storage simulation module uses a sequential control valve group to simulate the volume of hydrogen storage containers of different vehicle models. The sequential control valve group includes a sequential control valve group bracket, a high-pressure solenoid valve and a medium-pressure needle valve. The high-pressure solenoid valve realizes the automatic shut-off function of the sequential control valve group, and the medium-pressure needle valve is used to control the on-off of the release pipeline according to the release demand.

[0021] Preferably, in one embodiment, the nitrogen purge module is equipped with a nitrogen bottle installation position, a nitrogen bottle group and a nitrogen hose. The nitrogen bottle group is connected to the main pipeline system via a purge stop valve (17), a pressure regulating valve (18) and a second one-way valve (19), and cooperates with the pressure regulating valve control command input from the operation panel to provide a nitrogen purge function for the equipment.

[0022] On the other hand, in one embodiment, the hydrogen replacement module is equipped with a hydrogen cylinder installation position and a hydrogen cylinder group, and the hydrogen cylinder group is connected to the main pipeline system via a replacement stop valve (24), a pressure regulating valve (18) and a second one-way valve (19), and cooperates with the pressure regulating valve control command input by the operation panel to provide hydrogen replacement service for the equipment.

[0023] Optionally, in one embodiment, the hydrogen release module is arranged outside the skid-mounted carrier module, includes a hydrogen cylinder group, is connected to the main pipeline system via a first release stop valve (20), and is also connected to the hydrogen release pipeline of the on-board hydrogen storage simulation module through a hose via a second release stop valve (21) for discharging hydrogen.

[0024] Furthermore, in one embodiment, the hydrogen release module is connected to the input end of the first one-way valve of the main pipeline through a first release stop valve, and the hydrogen release module is connected to the input end of the pressure gauge (13) in the vehicle-mounted hydrogen storage simulation module through a second release stop valve.

[0025] In a preferred embodiment, the weighing and metering module is communicatively connected to the flow transmitter of the control unit, and is used to verify the metering function during the hydrogen filling process of the hydrogen filling machine based on the monitoring data of the mass flow meter in the on-board hydrogen storage simulation module.

[0026] In an optional embodiment, the environmental parameter monitoring module is communicatively connected to the operation control module, and includes a parameter acquisition unit and a monitoring processing unit, which are used to perform all-round monitoring of the internal environment of the device to ensure test safety; the parameter acquisition unit includes a hydrogen concentration detector, a flame detector and an ambient temperature sensor with explosion-proof properties; the detection processing unit includes an audible and visual alarm, an emergency stop button and an explosion-proof exhaust fan.

[0027] Optionally, in one embodiment, the skid-mounted transport module is used to provide a transport tool for each module in the skid; a waterproof box is provided, and different functional partitions are arranged inside the box to facilitate partition maintenance by testers, and ventilation windows are arranged at the front, back and top of the box.

[0028] On the other hand, based on the application of the device described in any one or more of the above embodiments, the present invention also provides a method for detecting the filling function of a hydrogen filling station, which is applied to the device described in any one or more of the above embodiments, and the method includes:

[0029] For each hydrogenation port, open the stop valve of its output pipeline, open the stop valve of the corresponding mass flow meter input pipeline, and start the mass flow meter;

[0030] Connect the matching hydrogenation gun to the current hydrogenation port, and after confirming that the connection is correct, establish infrared communication between the hydrogenation machine and the current hydrogenation port. After the hydrogenation machine receives the signal through the hydrogenation gun infrared receiver, the hydrogenation machine sends a pulse pressure signal to the current hydrogenation port of the detection device;

[0031] Based on the initial connection status, set the pressure signal abnormality through the operation panel to check and verify whether the hydrogenation machine effectively stops working and reports the leakage fault, so as to realize the initial leakage detection function verification;

[0032] Set the abnormal communication status through the operation panel to verify whether the hydrogen filling machine stops working or switches to the non-communication filling state to realize communication function verification;

[0033] After the leakage and communication detection functions are verified, the filling process fault detection verification begins to detect whether the hydrogen filling machine meets the initial conditions of the filling protocol and perform action verification;

[0034] After the initial state function verification, the filling process filling protocol detection function verification is started to verify whether the hydrogen refueling machine can select the appropriate filling protocol table according to the pressure category, precooling temperature, communication mode and the size of the on-board hydrogen bottle, and select the appropriate average boost rate and pressure parameters;

[0035] When the hydrogen in the hydrogen storage bottle group is full or the hydrogen in the hydrogen storage bottle is over-temperature, the second release stop valve is opened, and other valves in the device are closed to release the hydrogen in the hydrogen storage bottle through the pipeline and the flame arrester;

[0036] Open the stop valve at the flow meter input end, slowly open the purge stop valve, and introduce nitrogen. After the pressure gauge value stabilizes, close the purge stop valve, maintain the pressure for the set time, open the vent stop valve, vent the replacement gas, and then close the vent stop valve; repeat the above operation for the set number of purging times to complete the nitrogen replacement purging;

[0037] Open the stop valve at the flow meter input end, slowly open the replacement stop valve, and introduce hydrogen. After the pressure gauge value stabilizes, close the replacement stop valve, maintain the pressure for the set time, open the release stop valve, release the replacement gas, and then close the release stop valve; repeat the above operation for the set replacement times to complete the hydrogen replacement;

[0038] Repeat the above operation to implement filling function test for hydrogen filling ports of different specifications and matching hydrogen filling machines.

[0039] Based on other aspects of the method described in the above embodiments, the present invention further provides a storage medium on which program codes for implementing the method described in the above embodiments are stored.

[0040] Compared with the closest prior art, the present invention also has the following beneficial effects:

[0041] The present invention provides a hydrogen filling station filling function detection device and method, the device is provided with an operation control module including a control unit and an operation panel, and generates different control signals according to the needs of the staff, so that the staff can intuitively analyze the real-time monitoring data and issue operation instructions according to the monitoring data, thereby ensuring the safety and flexibility of the automatic test process;

[0042] The on-board hydrogen storage simulation module is used to simulate the on-board hydrogen storage systems of different models. The filling main line is connected to the hydrogen filling port of the hydrogen supply module. The nitrogen purge module and the hydrogen replacement module are connected to the main line through a pressure regulating valve and a one-way valve. The hydrogen release module is connected to the main line through a stop valve, and the hydrogen in the pipeline of the device is vented using a flame arrester. The process of the hydrogenator filling hydrogen into on-board hydrogen supply systems of different specifications is accurately simulated, and the pressure and temperature parameters of the relevant medium are detected in real time by automated detection technology. All-round operation simulation and information collection of the hydrogenation process are carried out to realize the monitoring of the hydrogenator metering during the filling process, and at the same time, the hydrogenator filling safety can be effectively judged.

[0043] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0045] Figure 1 It is a structural schematic diagram of a hydrogen filling station filling function detection device provided by one embodiment of the present invention;

[0046] Figure 2 It is a schematic diagram of the detection application principle of the hydrogen filling function detection device provided by the embodiment of the present invention;

[0047] Figure 3 It is a structural schematic diagram of a skid-mounted carrier module in a hydrogen filling function detection device provided by another embodiment of the present invention;

[0048] Figure 4 It is a flow chart of a method for detecting the filling function of a hydrogen filling station provided in one embodiment of the present invention;

[0049] Figure 5 It is a flow chart of a method for detecting the filling function of a hydrogen filling station provided in another embodiment of the present invention. DETAILED DESCRIPTION

[0050] The following will describe the implementation methods of the present invention in detail in conjunction with the accompanying drawings and embodiments, so that the implementers of the present invention can fully understand how the present invention applies technical means to solve technical problems and achieve the implementation process of technical effects and implement the present invention specifically according to the above implementation process. It should be noted that as long as there is no conflict, the various embodiments and various features of the embodiments in the present invention can be combined with each other, and the technical solutions formed are all within the protection scope of the present invention.

[0051] Although the flowcharts describe the operations as sequential processes, many of the operations may be performed in parallel, concurrently, or simultaneously. The order of the operations may be rearranged. A process may be terminated when its operations are completed, but may also have additional steps not included in the accompanying drawings. A process may correspond to a method, function, procedure, subroutine, subprogram, etc.

[0052] Computer devices include user devices and network devices. Among them, user devices or clients include but are not limited to computers, smart phones, PDAs (Personal Digital Assistants), etc.; network devices include but are not limited to a single network server, a server group consisting of multiple network servers, or a cloud based on cloud computing consisting of a large number of computers or network servers. Computer devices can be run alone to implement the present invention, or they can be connected to the network and implement the present invention through interactive operations with other computer devices in the network. The network where the computer device is located includes but is not limited to the Internet, wide area network, metropolitan area network, local area network, VPN network, etc.

[0053] The terms "first", "second", etc. may be used herein to describe various units, but these units should not be limited by these terms, and these terms are used only to distinguish one unit from another unit. The term "and / or" used herein includes any and all combinations of one or more of the listed associated items. When a unit is referred to as being "connected" or "coupled" to another unit, it can be directly connected or coupled to the other unit, or there can be intermediate units.

[0054] The terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments. Unless the context clearly indicates otherwise, the singular forms "one", "one" and "item" used herein are also intended to include plural numbers. It should also be understood that the terms "include" and / or "comprise" used herein specify the existence of stated features, integers, steps, operations, units and / or components, without excluding the existence or addition of one or more other features, integers, steps, operations, units, components and / or combinations thereof.

[0055] With the development of social economy, high-pressure gas energy technology has been widely promoted and utilized, and hydrogen energy is an important application field. Hydrogen energy plays an important role in the future energy structure and will play an important role in the new global energy structure. The technological innovation, industry competition and huge investment opportunities brought about by its development are strategic supports for improving social productivity and comprehensive national strength. Hydrogen energy is listed as a key basic research content and advanced energy frontier technology.

[0056] Safe and efficient hydrogen storage, transmission and refueling are key technologies for large-scale utilization of hydrogen energy. Based on existing technical conditions and current development status, the three main hydrogen storage methods suitable for commercial use are high-pressure hydrogen storage, liquid hydrogen storage and transportation, and metal hydride hydrogen storage. Among them, high-pressure room-temperature hydrogen storage and transmission are highly valued due to their advantages such as simple equipment structure, low energy consumption for compressed hydrogen preparation, and fast filling and discharge speeds. They are currently the dominant hydrogen energy storage and transportation methods.

[0057] The hydrogen refueling process involves repeated connection and communication matching between the hydrogen refueling machine and the onboard hydrogen storage system of the fuel cell vehicle. Different hydrogen fuel cell vehicle manufacturers have different structural forms and layouts of hydrogen refueling ports and related accessories. After the construction of the hydrogen refueling station is completed, it is necessary to meet the refueling needs of different types of vehicles. This requires different types of vehicles to go to the station for refueling function verification, which is time-consuming and labor-intensive. In addition, the hydrogen refueling process of hydrogen refueling stations / oil-hydrogen combined stations has high operational risks. During the refueling process of fuel cell vehicles in the station, the hydrogen refueling machine, the onboard hydrogen storage system, etc. may fail or the control logic fails, causing the onboard hydrogen storage system to refuel too quickly, overheat, or overcharge and overpressure, which in turn causes large-scale hydrogen leakage.

[0058] On the other hand, the hydrogen filling process of hydrogen refueling stations / oil-hydrogen combined stations has high requirements on the quality accuracy of hydrogen filling. If the filling performance accuracy is insufficient, inaccurate measurement or failures may occur during service, thus causing trade disputes. At the same time, if the method of regular calibration and approval is adopted, the equipment and mass flow meter need to be repeatedly disassembled and assembled, which may easily cause irreversible damage to structures such as threaded connectors, posing a huge safety hazard. It can be seen that in order to effectively and safely realize the large-scale construction of hydrogen refueling stations, reliable safety acceptance and quality inspection of the filling function will become a key issue.

[0059] The researchers of the present invention found that although the existing technology has standardized the refueling protocol and communication standards for hydrogen refueling machines, such as the SAE J2601 and SAE J2799 related standards, the current existing technology is mostly focused on the design and improvement of individual modules, lacks overall detection and verification technology, and cannot achieve a systematic and easy-to-use overall detection of the refueling function of the hydrogen refueling station.

[0060] In order to solve the above problems, the present invention provides a hydrogen filling function detection device and method for a hydrogen filling station. The device simulates the process of a hydrogen filling machine filling a vehicle-mounted hydrogen supply system with hydrogen. During the simulation, the actual curve of the hydrogen filling process can be effectively displayed, and compared with the hydrogen filling protocol, so as to detect whether the hydrogen filling accuracy and hydrogen filling performance of the hydrogen filling machine meet the protocol requirements. The present invention adopts automated detection technology to perform real-time detection of pressure and temperature parameters in the medium in the system, simulates the hydrogen filling process and collects information, realizes the monitoring of hydrogen filling machine metering during the filling process, and judges the filling safety of the hydrogen filling machine during the filling process.

[0061] Next, the structural components, connection modes and functional principles of the system of the embodiment of the present invention are described in detail based on the drawings. Although the logical order of each operation is shown in the process of describing the operating principle of the system structure, in some cases, the operations shown or described can be performed in a different order than here.

[0062] Embodiment 1:

[0063] Figure 1The schematic diagram of the structure of the hydrogen filling station filling function detection device provided in the first embodiment of the present invention is shown. Figure 1 It can be seen that the device includes: an operation control module, an on-board hydrogen storage simulation module, a hydrogen release module, a hydrogen supply module, a nitrogen purge module, a hydrogen replacement module, a weighing and metering module, and a skid-mounted transport module;

[0064] The operation control module includes a control unit and an operation panel, on which are integrated display instruments for the hydrogenation port, a built-in infrared emitter of the hydrogenation port, key valves, and a touch interactive screen;

[0065] The operation panel and the control unit are connected in communication, and the operation panel and the control unit cooperate to generate different control signals according to the needs of the staff;

[0066] The control unit is communicatively connected with a hydrogen storage controller of a hydrogen filling function detection device of a hydrogen filling station under test;

[0067] The on-board hydrogen storage simulation module is used to simulate the on-board hydrogen storage system of different vehicle models, and is connected to the hydrogen filling port of the hydrogen supply module through the filling main line. The on-board hydrogen storage simulation module is equipped with a hydrogen storage bottle group, a hydrogen storage bottle installation frame, and a hydrogen storage controller;

[0068] The nitrogen purge module and the hydrogen replacement module are connected to the main pipeline via a pressure regulating valve and a second one-way valve;

[0069] The hydrogen release module is connected to the main pipeline via a stop valve and is configured to use a flame arrester to release hydrogen in the device pipeline.

[0070] In a preferred embodiment, the hydrogenation port includes one or more 35MPa hydrogenation ports and one or more 70MPa hydrogenation ports, the 35MPa hydrogenation ports and the 70MPa hydrogenation ports are arranged in parallel pipelines, and each hydrogenation port adopts an independent output pipeline and is independently provided with a shut-off valve.

[0071] Further, in one embodiment, a hydrogenation port output shut-off valve, 7-a first one-way valve and 8-a filter are sequentially arranged on the main pipe between the hydrogenation port and the on-board hydrogen storage simulation module;

[0072] The first one-way valve is used to prevent the 70MPa high-pressure hydrogen from flowing back to the 35MPa hydrogenation port; the filter is used to filter impurities in the hydrogen.

[0073] Preferably, in one embodiment, the on-board hydrogen storage simulation module is also configured with a mass flow meter, which is connected to the output end of the filter and includes a 35MPa mass flow meter and a 70MPa mass flow meter.

[0074] In actual application, in an optional embodiment, the 35MPa mass flowmeter and the 70MPa mass flowmeter are arranged through parallel pipelines, and stop valves are independently arranged at the input ends of their respective pipelines.

[0075] Further, preferably, in one embodiment, the on-board hydrogen storage simulation module is also configured with 13-pressure gauge and 14-temperature sensor, the hydrogen storage bottle group is connected to the output end of the mass flow meter via the temperature sensor and the pressure gauge, and the pressure and temperature of the hydrogen storage bottle group are monitored in real time during the test, so as to start the hydrogen release module to release the hydrogen in the hydrogen storage bottle group and the pipeline when the pressure or temperature is abnormal, such as Figure 2 shown.

[0076] In an optional embodiment, the on-board hydrogen storage simulation module uses a sequential control valve group to simulate the volume of hydrogen storage containers of different vehicle models. The sequential control valve group includes a sequential control valve group bracket, a high-pressure solenoid valve and a medium-pressure needle valve. The high-pressure solenoid valve realizes the automatic shut-off function of the sequential control valve group, and the medium-pressure needle valve is used to control the on-off of the release pipeline according to the release demand.

[0077] The nitrogen purge module is equipped with a nitrogen bottle installation position, a nitrogen bottle group and a nitrogen hose. The nitrogen bottle group is connected to the main pipeline system through 17-purge stop valve, 18-pressure regulating valve and 19-second one-way valve, and cooperates with the pressure regulating valve control command input by the operation panel to provide nitrogen purge function for the equipment.

[0078] In an optional embodiment, the hydrogen replacement module is configured with a hydrogen cylinder installation position and a hydrogen cylinder group. The hydrogen cylinder group is connected to the main line system via 24-replacement stop valve, 18-pressure regulating valve and 19-second one-way valve, and cooperates with the pressure regulating valve control command input by the operation panel to provide hydrogen replacement service for the equipment.

[0079] The hydrogen release module is arranged outside the skid-mounted carrier module, and includes a hydrogen cylinder group, which is connected to the main pipeline system through 20-a first release stop valve, and is also connected to the hydrogen release pipeline of the on-board hydrogen storage simulation module through a hose through 21-a second release stop valve for discharging hydrogen.

[0080] The hydrogen release module is connected to the input end of the first one-way valve of the main pipeline through a first release stop valve, and the hydrogen release module is connected to the input end of the 13-pressure gauge in the vehicle-mounted hydrogen storage simulation module through a second release stop valve.

[0081] The weighing and metering module is communicatively connected with the flow transmitter of the control unit, and is used to verify the metering function during the hydrogen filling process of the hydrogen filling machine based on the monitoring data of the mass flow meter in the on-board hydrogen storage simulation module.

[0082] The environmental parameter monitoring module is connected to the operation control module in communication, and includes a parameter acquisition unit and a monitoring processing unit, which are used to perform all-round monitoring of the internal environment of the device to ensure test safety; the parameter acquisition unit includes a hydrogen concentration detector, a flame detector and an ambient temperature sensor with explosion-proof properties; the detection processing unit includes an audible and visual alarm, an emergency stop button and an explosion-proof exhaust fan, such as Figure 3 shown.

[0083] The device is provided with a skid-mounted transport module for providing a transport tool for each module in the skid; a waterproof box is provided, and different functional partitions are arranged inside the box to facilitate partition maintenance by testers, and ventilation windows are arranged at the front, back and top of the box.

[0084] The on-board hydrogen storage simulation module adopts a sequential control valve group to simulate the volume of hydrogen storage containers of different vehicle models. The sequential control valve group includes a sequential control valve group bracket, a high-pressure solenoid valve and a medium-pressure needle valve. The high-pressure solenoid valve realizes the automatic shut-off function of the sequential control valve group, and the medium-pressure needle valve is used to control the on-off of the release pipeline according to the release demand.

[0085] The embodiment of the present invention provides a hydrogen filling function detection device for a hydrogen filling station, which can be used to accurately simulate the process of a hydrogen filling machine filling a vehicle-mounted hydrogen supply system with hydrogen. In this process, the actual curve of the hydrogen filling process is displayed and compared with the hydrogen filling protocol to detect whether the hydrogen filling accuracy and hydrogen filling performance of the hydrogen filling machine meet the protocol requirements. The present invention adopts automated detection technology to perform real-time detection of pressure and temperature parameters in the medium in the system, simulate the hydrogen filling process and collect information, realize the monitoring of hydrogen filling machine metering during the filling process, and judge the hydrogen filling safety during the filling process.

[0086] The operation panel of the operation control module is the main human-machine interaction interface in the device; the operation panel displays the effective hydrogenation ports and supported hydrogenation machine specifications.

[0087] In an optional embodiment, for example, a 1-35MPa hydrogenation port, a 3-35MPa hydrogenation port and a 5-70MPa hydrogenation port are set, which are connected to the hydrogenation gun during testing to hydrogenate the hydrogen storage module. Three models are equipped to meet the connection requirements of 35MPa, TN1 and TN5 and 70MPa grade hydrogenation guns.

[0088] In actual application, the operation panel can be used to generate control instructions from the control unit to control the infrared control and communication module to receive the hydrogen storage system parameters summarized by the hydrogen storage controller and send the signal to the hydrogen filling machine. The filling flow rate during the filling process is calibrated through the weighing and metering module to verify the metering accuracy of the hydrogen filling machine.

[0089] In addition, key valves such as 2-stop valve, 4-stop valve, 6-stop valve, 17-purge stop valve, etc. can be controlled through the operation panel. These are mainly the inlet shut-off valves of the hydrogen pipeline and the nitrogen pipeline, which are used to control the on-off of the corresponding branches, or when the equipment is purged, the nitrogen pressure can be adjusted by controlling the pressure regulating valve through the control panel to achieve the pressure required for equipment purge.

[0090] In an optional embodiment, the display instrument of the digital acquisition mechanism of the display device on the operation panel may mainly include 13-hydrogen pipeline pressure gauge, 14-temperature transmitter, 10-35MPa mass flow meter, 12-70MPa mass flow meter, flow transmitter local display table; it is mainly used to display the hydrogen pressure value in the main line and each hydrogen storage bottle and the flow data in the pipeline during filling.

[0091] The present invention receives the hydrogen storage system parameters summarized by the hydrogen controller through the infrared control and communication module on the operation panel, and sends the signal to the hydrogen filling machine. The filling flow rate during the filling process is checked through the weighing and metering module to verify the metering accuracy of the hydrogen filling machine.

[0092] At the same time, the device is equipped with a built-in PLC system, which can manually set fault instructions and send them to the hydrogen filling machine through the infrared control and communication module to verify whether the hydrogen filling machine's fault identification and response dynamics are accurate and timely.

[0093] The operation panel is the main human-machine interaction interface in the device, and the panel integrates hydrogenation ports and infrared transmitters, key valves, display instruments and touch screens, etc.

[0094] The on-board hydrogen storage simulation module is provided with a hydrogen storage controller including an infrared control and communication module. The hydrogen storage controller summarizes various parameters of the on-board hydrogen storage simulation module, and converts the parameters into infrared signals through the infrared transmission module and transmits them. In actual application, the format of the infrared signal is defined according to the requirements of the "SAE J2799-2014 Hydrogen Fuel Vehicle Refueling Station Software and Hardware Standard", and the signal can be transmitted with the hydrogen filling machine that meets the design standards. The infrared transmission module can transmit data in real time during the hydrogen filling process.

[0095] The key valves in the device, such as 2-stop valve, 4-stop valve, 6-stop valve, 17-purge stop valve, etc., are mainly the inlet shut-off valves of the hydrogen pipeline and the nitrogen pipeline, which are used to control the on-off of the corresponding branches, or to adjust the nitrogen pressure when the equipment is purged to achieve the pressure required for equipment purge.

[0096] The display instruments on the operation panel mainly include 13-hydrogen pipeline pressure gauge, 14-temperature transmitter, 10-35MPa mass flow meter, 12-70MPa mass flow meter, and flow transmitter local display table; they are mainly used to display the hydrogen pressure values ​​in the main line and each hydrogen storage bottle and the flow data in the pipeline during filling.

[0097] The touch interactive screen can provide a touch manual operation interface for the test personnel, and corresponding operations can be performed on the interface according to the test requirements during the test, such as parameter input, switching between different working interfaces, etc.; the touch screen is an explosion-proof product and is equipped with an explosion-proof control box to meet the use requirements of the hydrogen environment.

[0098] The vehicle-mounted hydrogen storage simulation module is connected to the hydrogen filling port during the test process, and is used to combine and configure different numbers of hydrogen storage bottles to simulate the volume of hydrogen storage containers of different vehicle models.

[0099] Furthermore, the vehicle-mounted hydrogen storage simulation module is equipped with a hydrogen storage bottle, a hydrogen storage bottle mounting frame, a hydrogen storage controller and a temperature sensor. Optionally, a sequential control valve group is used to simulate the volume of hydrogen storage containers of different vehicle models. During refueling, according to different preset vehicle models, the corresponding number of hydrogen storage bottles is selected to test the refueling speed of the hydrogen refueling machine for different volume vehicle models. The sequential control valve group includes a sequential control valve group bracket and a high-pressure solenoid valve, a pressure sensor, a temperature sensor and a medium-pressure needle valve arranged thereon. The sequential control valve group is connected to a venting pipeline.

[0100] Specifically, the on-board hydrogen storage simulation module is configured to use an explosion-proof pressure sensor to detect the hydrogen pressure value in each section of the pipeline, and to use a temperature sensor to detect the hydrogen temperature in the pipeline in real time. The high-pressure solenoid valve in the valve group mainly realizes the automatic shut-off function. The pressure sensor is used to detect the hydrogen pressure value in each section of the pipeline. The pressure sensor is an explosion-proof product that meets the requirements for use in a hydrogen environment. The temperature sensor can detect the hydrogen temperature in the pipeline in real time. The medium-pressure needle valve in the sequential control valve group mainly plays a shut-off role and is used for manual release. The above-mentioned data acquisition mechanism and valve components are installed on the sequential control valve group bracket and are effectively fixed by pipe clamps, brackets, etc.

[0101] The hydrogen storage controller is mainly used for controlling the on-board hydrogen storage simulation module, such as the switch of the bottle valve, which can control the opening of the bottle valve separately and control the infrared module. The infrared control receives the parameters of the on-board hydrogen storage simulation module summarized by the hydrogen storage controller through the communication module.

[0102] The hydrogen storage bottle is mainly used to store hydrogen from the hydrogen filling machine; the hydrogen storage bottle installation frame mainly provides a mounting bracket for the gas cylinder, including a frame, a bottle seat, a strap, etc.

[0103] The vehicle-mounted hydrogen storage simulation module also includes a temperature sensor 14, which is installed on the outer wall of the hydrogen storage bottle to detect the temperature of the outer wall of the hydrogen storage bottle.

[0104] The hydrogen release module is arranged outside the skid-mounted carrier module, and is connected to the hydrogen release pipeline of the vehicle-mounted hydrogen storage simulation module through a release hose, so as to discharge hydrogen.

[0105] In actual application, the hydrogen release module is equipped with automatic release and manual release modules. The release pipelines in the sequential control valve group are collected and connected to the release main pipe outside the mobile skid through a hose for centralized discharge. The release hose and the release main pipe are located outside the mobile skid.

[0106] The nitrogen purge module cooperates with the pressure regulating valve on the operation panel to provide a nitrogen purge function for the equipment, and is equipped with a nitrogen bottle installation position, a nitrogen bottle and a nitrogen hose.

[0107] The weighing and metering module is connected to the flow transmitter of the control unit in communication, and is used to verify the metering function of the hydrogen filling machine during the filling process based on the monitoring data of the high-precision mass flow meter of the on-board hydrogen storage simulation module. Figure 1 As shown in the figure, the function of the weighing and metering module is to verify the metering function during the hydrogen filling process of the hydrogen filling machine, which is mainly realized by the high-precision mass flow meter (10 and 12) integrated in the sequential control valve group and the flow transmitter on the operation panel.

[0108] The environmental parameter monitoring module is communicatively connected with the operation control module, and includes a parameter acquisition unit and a monitoring processing unit, which are mainly used to perform all-round monitoring of the internal environment of the device to ensure test safety; the parameter acquisition unit includes a hydrogen concentration detector, a flame detector and an ambient temperature sensor with explosion-proof properties; the detection processing unit includes an audible and visual alarm, an emergency stop button and an explosion-proof exhaust fan.

[0109] In actual application, the device of the present invention is provided with a lighting device to enable various detectors and sensors to function normally, including a built-in hydrogen concentration detector, a flame detector, an explosion-proof exhaust fan, an audible and visual alarm, an emergency stop button, an ambient temperature sensor, etc.

[0110] The skid-mounted carrier module mainly provides a transport tool for the modules inside the skid; a waterproof box is provided, and different functional partitions are arranged inside the box to facilitate partition maintenance by testers, and ventilation windows are arranged at the front, back and top of the box.

[0111] In actual application, the box body adopts a firm and tough material and structure that can meet the set requirements and conform to international device standards. The door and window frame is pressed by a mold, has good airtightness, beautiful appearance, and good waterproofness. The skid is functionally partitioned to facilitate operation and maintenance by testers. Ventilation shutters are installed on the front and back of the box body to facilitate air circulation inside the skid, and a motorless ventilation fan is installed on the top of the skid for exhaust at the top.

[0112] The hydrogen filling station filling function detection device of the present invention can be used to test and verify the filling and metering functions of the hydrogen filling station, solving the problem that the communication standard, filling protocol and metering function of the hydrogen filling machine in the hydrogen filling station cannot be verified. The automatic detection technology is used to perform real-time detection of the pressure and temperature parameters in the medium in the system, simulate the hydrogenation process and collect information, realize the monitoring of the metering of the hydrogen filling machine during the filling process, and judge the filling safety of the hydrogen filling machine during the filling process.

[0113] When using the hydrogen filling station filling function detection device of the present invention for detection, the detection operation is carried out according to the following operations and precautions:

[0114] S1. Before the first use, all valves are in the closed state, and the hydrogenation machine equipped with 35MPa, TN1 hydrogenation gun is functionally verified.

[0115] S2. Open the 2-stop valve, open the 9-stop valve, and use a 10-35MPa mass flow meter for measurement.

[0116] S3. Connect the hydrogenation gun to the 1-hydrogenation port. After confirming that the connection is correct, establish infrared communication from the hydrogenation machine to the 1-hydrogenation port and check whether the following conditions are met.

[0117] S301. Check at the physical level whether effective communication conditions are available.

[0118] S302: The testing device does not send a request for a termination signal.

[0119] S303. The deviation between the volume of the on-board hydrogen storage simulation module of the communication transmission detection device and the volume of the on-board hydrogen storage system measured by the hydrogen filling machine is within 15%.

[0120] S304. After considering the influence of sensor and system calculation deviations, the initial pressure of the on-board hydrogen storage simulation module of the communication transmission detection device is consistent with the initial pressure measured by the hydrogen filling machine.

[0121] S4. After the hydrogenator receives the signal through the infrared receiver of the hydrogenator gun, the hydrogenator sends a pulse pressure signal to the detection device 1-hydrogenation port to perform leak detection in the initial connection state.

[0122] S5. Initial leakage detection function verification: through the operation panel, manually set the pressure signal abnormality, check and verify whether the hydrogenation machine stops operating and reports the leakage fault.

[0123] S6, communication function verification, through the operation panel, manually cut off the communication, set to 1-hydrogenation port built-in infrared receiver signal loss failure, check and verify whether the hydrogenation machine stops operating or switches to the non-communication filling state.

[0124] S7. After the communication and leakage functions are verified, the filling process fault detection verification is started to detect whether the hydrogen filling machine meets the initial conditions of the filling protocol and perform action verification.

[0125] S701, maximum on-board hydrogen storage tank pressure test, detect the pressure of the on-board hydrogen storage simulation module of the test device, and send the pressure signal to the hydrogen filling machine through the built-in infrared signal transmission device of the 1-hydrogen filling port, or send a virtual pressure signal to the hydrogen filling machine through the control panel, and the hydrogen filling machine will act after judgment. When the pressure of the on-board hydrogen storage simulation module of the test device is greater than 43.75MPa, the hydrogen filling machine will not perform the filling action.

[0126] S702, the maximum hydrogen temperature test of the on-board hydrogen storage bottle, detects the temperature of the on-board hydrogen storage simulation module of the test device, and sends the temperature signal to the hydrogen filling machine through the built-in infrared signal transmission device of the 1-hydrogen filling port, or manually sends a virtual temperature signal to the hydrogen filling machine through the control panel, and the hydrogen filling machine takes action after judgment. When the temperature of the on-board hydrogen storage simulation module of the test device is greater than 85°C, the hydrogen filling machine does not perform the filling action.

[0127] S703, the minimum initial pressure test of the on-board hydrogen storage bottle, detects the pressure of the on-board hydrogen storage simulation module of the test device, and sends the pressure signal to the hydrogen filling machine through the 1-hydrogen filling port infrared signal transmission device, or manually sends a virtual pressure signal to the hydrogen filling machine through the control panel, and the hydrogen filling machine takes action after judgment. When the pressure of the on-board hydrogen storage simulation module of the test device is less than 0.5MPa, the hydrogen filling machine does not perform the filling action.

[0128] S704, the maximum initial pressure test of the on-board hydrogen storage bottle, detects the pressure of the on-board hydrogen storage simulation module of the test device, and sends the pressure signal to the hydrogen filling machine through the 1-hydrogen filling port infrared signal transmission device, or manually sends a virtual pressure signal to the hydrogen filling machine through the control panel, and the hydrogen filling machine takes action after judgment. When the pressure of the on-board hydrogen storage simulation module of the test device is greater than the nominal working pressure of the hydrogen filling machine, that is, 35MPa, the hydrogen filling machine does not perform the filling action.

[0129] S8. After the initial status check function is verified, the filling process filling protocol detection function verification begins. This function mainly verifies whether the hydrogen refueling machine can select the appropriate filling protocol table according to the pressure category, precooling temperature, communication mode and the size of the on-board hydrogen bottle, and select the appropriate average pressure increase rate (APRR) and pressure parameters. The operations of this verification process include:

[0130] The filling table category selection function verification is that the built-in infrared transmitter of the 1-hydrogen filling port sends a hydrogen filling signal to the hydrogen filling machine. The hydrogen filling machine selects the filling table according to its own pressure level, hydrogen output temperature of the hydrogen filling machine, volume of the hydrogen storage system of the test device, and communication mode. The built-in system of the test device is used to check and verify whether the filling table selected by the hydrogen filling machine is appropriate and whether it complies with the requirements of the SAEJ2601 filling protocol. Alternatively, through the control panel, abnormal temperature, volume, communication mode, etc. are manually set, and abnormal signals are sent to the hydrogen filling machine to check whether the hydrogen filling machine can identify the fault mode and make a judgment response.

[0131] After the initial status check function is verified, the filling process filling protocol detection function verification begins. This function mainly verifies whether the hydrogen refueling machine can select the appropriate filling protocol table according to the pressure category, precooling temperature, communication mode and the size of the on-board hydrogen bottle, and select the appropriate average pressure increase rate (APRR) and pressure parameters. The verification operation also includes:

[0132] The APRR selection function is verified by sending a hydrogen filling signal from the built-in infrared transmitter of the 1-hydrogen filling port to the hydrogen filling machine. The hydrogen filling machine selects the appropriate APRR according to the filling table and ambient temperature to ensure that the filling parameters such as temperature and pressure during the filling process do not exceed the corresponding boundary conditions. The built-in system of the test device is used to check and verify whether the APRR selected by the hydrogen filling machine is appropriate and whether it complies with the requirements of the SAEJ2601 filling protocol. Alternatively, an abnormal APRR is manually set through the control panel, and an abnormal signal is sent to the hydrogen filling machine, so that the filling parameters such as temperature and pressure during the filling process exceed the corresponding boundary conditions, and check whether the hydrogen filling machine can identify the fault mode and make a judgment response.

[0133] After the initial status check function is verified, the filling process filling protocol detection function verification begins. This function mainly verifies whether the hydrogen refueling machine can select the appropriate filling protocol table according to the pressure category, precooling temperature, communication mode and the size of the on-board hydrogen bottle, and select the appropriate average pressure rise rate (APRR) and pressure parameters. The specific operations of the verification also include:

[0134] After the pressure selection correctness test is completed, the built-in infrared transmitter of the 1-hydrogen filling port sends a hydrogen filling signal to the hydrogen filling machine. The hydrogen filling machine selects the stop filling parameters according to the filling pressure, target pressure, and the status of the on-board hydrogen storage simulation module to ensure that the filling parameters such as temperature and pressure during the filling process do not exceed the corresponding boundary conditions. The built-in system of the test device is used to check and verify whether the parameters selected by the hydrogen filling machine to stop filling are appropriate and whether they meet the requirements of the SAE J2601 filling protocol. Alternatively, through the control panel, abnormal filling parameters are manually set, and abnormal signals are sent to the hydrogen filling machine, so that the filling parameters such as temperature and pressure during the filling process exceed the corresponding boundary conditions, and check whether the hydrogen filling machine can identify the fault mode and make a judgment, and stop filling.

[0135] After the initial status check function is verified, the filling process filling protocol detection function verification begins. This function mainly verifies whether the hydrogen refueling machine can select the appropriate filling protocol table according to the pressure category, precooling temperature, communication mode and the size of the on-board hydrogen bottle, and select the appropriate average pressure increase rate (APRR) and pressure parameters. The specific operations of the verification also include:

[0136] The hydrogen filling machine pressure tolerance range test, during the main filling period, the built-in infrared transmitter of the 1-hydrogen filling port sends a hydrogen filling signal to the hydrogen filling machine, and the built-in system of the test device is used to check and verify whether the pipeline pressure drop between the hydrogen filling machine pressure measurement position and the on-board hydrogen storage simulation module of the test device exceeds 2-20MPa. If it exceeds the above range, the filling is stopped within 5s. Alternatively, the abnormal filling parameters are manually set through the control panel, and the abnormal signal is sent to the hydrogen filling machine, so that the pipeline pressure drop exceeds the corresponding boundary conditions during the filling process, and the hydrogen filling machine can be checked to see whether it can identify the fault mode and make a judgment, and then stop the filling.

[0137] After the initial status check function is verified, the filling process filling protocol detection function verification begins. This function mainly verifies whether the hydrogen refueling machine can select the appropriate filling protocol table according to the pressure category, precooling temperature, communication mode and the size of the on-board hydrogen bottle, and select the appropriate average pressure increase rate (APRR) and pressure parameters. The specific operations of the verification also include:

[0138] Frequent start-stop judgment function verification, the built-in infrared transmitter of the hydrogen filling port 1 sends a hydrogen filling signal to the hydrogen filling machine, and the built-in system of the test device checks and verifies whether the hydrogen filling flow of the hydrogen filling machine is reduced to less than 1% (0.6g / s) of the maximum flow for more than 10 times. If it exceeds 10 times, stop filling within 5s. Or through the control panel, manually set abnormal filling parameters, send abnormal signals to the hydrogen filling machine, so that the number of abnormal hydrogen filling flow during the filling process exceeds 10 times, check whether the hydrogen filling machine can identify the fault mode and make a judgment, and stop filling.

[0139] All valves of S9 are in the closed state, which is the function verification of the hydrogenation machine equipped with 35MPa and TN5 hydrogenation gun.

[0140] S10 opens the 2-stop valve, opens the 9-stop valve, and uses a 10-35MPa mass flow meter for measurement.

[0141] Further, the following operations are performed accordingly for the 3-hydrogenation port:

[0142] S11. Connect the hydrogenation gun to the 3-hydrogenation port. After confirming that the connection is correct, establish infrared communication from the hydrogenation machine to the 3-hydrogenation port and check whether the following conditions are met.

[0143] S1101. Check at the physical level whether effective communication conditions are available.

[0144] S1102: The testing device does not send a request for a termination signal.

[0145] S1103. The deviation between the volume of the on-board hydrogen storage simulation module of the communication transmission detection device and the volume of the on-board hydrogen storage system measured by the hydrogen filling machine is within 15%.

[0146] S1104. After considering the influence of sensor and system calculation deviations, the initial pressure of the on-board hydrogen storage simulation module of the communication transmission detection device is consistent with the initial pressure measured by the hydrogen filling machine.

[0147] S12, after the hydrogenator receives the signal through the infrared receiver of the hydrogenator gun, the hydrogenator sends a pulse pressure signal to the detection device 3-hydrogenation port to perform leak detection in the initial connection state.

[0148] S13, initial leakage detection function verification, through the operation panel, manually set the pressure signal abnormality, check and verify whether the hydrogenation machine stops operating, and report the leakage fault.

[0149] S14, communication function verification, through the operation panel, manually cut off the communication, set it to 3-hydrogenation port signal loss fault, check and verify whether the hydrogenation machine stops operating or switches to the non-communication filling state.

[0150] S15. After the communication and leakage functions are verified, the filling process fault detection verification is started to detect whether the hydrogen filling machine meets the initial conditions of the filling protocol and perform action verification. The verification operation includes:

[0151] The maximum on-board hydrogen storage tank pressure test detects the pressure of the on-board hydrogen storage simulation module of the test device, and sends the pressure signal to the hydrogen filling machine through the 3-hydrogen filling port infrared signal transmission device, or manually sends a virtual pressure signal to the hydrogen filling machine through the control panel, and the hydrogen filling machine takes action after judgment. When the pressure of the on-board hydrogen storage simulation module of the test device is greater than 43.75MPa, the hydrogen filling machine does not perform the filling action.

[0152] The maximum hydrogen temperature test of the on-board hydrogen storage bottle detects the temperature of the on-board hydrogen storage simulation module of the test device, and sends the temperature signal to the hydrogen filling machine through the 3-hydrogen filling port infrared signal transmission device, or sends a virtual temperature signal to the hydrogen filling machine through the control panel, and the hydrogen filling machine takes action after judgment. When the temperature of the on-board hydrogen storage simulation module of the test device is greater than 85°C, the hydrogen filling machine will not perform the filling action.

[0153] The minimum initial pressure test of the on-board hydrogen storage bottle detects the pressure of the on-board hydrogen storage simulation module of the test device, and sends the pressure signal to the hydrogen filling machine through the 3-hydrogen filling port infrared signal transmission device, or manually sends a virtual pressure signal to the hydrogen filling machine through the control panel, and the hydrogen filling machine takes action after judgment. When the pressure of the on-board hydrogen storage simulation module of the test device is less than 0.5MPa, the hydrogen filling machine does not perform the filling action.

[0154] The maximum initial pressure test of the on-board hydrogen storage bottle detects the pressure of the on-board hydrogen storage simulation module of the test device, and sends the pressure signal to the hydrogen filling machine through the 3-hydrogen filling port infrared signal transmission device, or sends a virtual pressure signal to the hydrogen filling machine through the control panel, and the hydrogen filling machine takes action after judgment. When the pressure of the on-board hydrogen storage simulation module of the test device is greater than the nominal working pressure of the hydrogen filling machine, that is, 35MPa, the hydrogen filling machine will not perform the filling action.

[0155] After the S16 initial status check function is verified, the filling process filling protocol detection function verification begins. This function mainly verifies whether the hydrogen refueling machine can select the appropriate filling protocol table according to the pressure category, precooling temperature, communication mode and the size of the on-board hydrogen bottle, and select the appropriate average pressure rise rate (APRR) and pressure parameters, including the following links.

[0156] The filling table category selection function verification is that the built-in infrared transmitter of the 3-hydrogen filling port sends a hydrogen filling signal to the hydrogen filling machine. The hydrogen filling machine selects the filling table according to its own pressure level, the hydrogen output temperature of the hydrogen filling machine, the volume of the on-board hydrogen storage simulation module of the test device, and the communication method. The built-in system of the test device is used to check and verify whether the filling table selected by the hydrogen filling machine is appropriate and whether it meets the requirements of the SAE J2601 filling protocol. Alternatively, through the control panel, the abnormal temperature, volume, communication method, etc. are manually set, and the abnormal signal is sent to the hydrogen filling machine to check whether the hydrogen filling machine can identify the fault mode and make a judgment response.

[0157] The APRR selection function is verified by sending a hydrogen filling signal from the built-in infrared transmitter of the 3-hydrogen filling port to the hydrogen filling machine. The hydrogen filling machine selects the appropriate APRR according to the filling table and ambient temperature to ensure that the filling parameters such as temperature and pressure during the filling process do not exceed the corresponding boundary conditions. The built-in system of the test device is used to check and verify whether the APRR selected by the hydrogen filling machine is appropriate and whether it meets the requirements of the SAEJ2601 filling protocol. Alternatively, through the control panel, an abnormal APRR is manually set, and an abnormal signal is sent to the hydrogen filling machine, so that the filling parameters such as temperature and pressure during the filling process exceed the corresponding boundary conditions, to check whether the hydrogen filling machine can identify the fault mode and make a judgment response.

[0158] After the pressure selection correctness test is completed, the built-in infrared transmitter of the 3-hydrogen filling port sends a hydrogen filling signal to the hydrogen filling machine. The hydrogen filling machine selects the stop filling parameters according to the filling pressure, target pressure, and the status of the on-board hydrogen storage simulation module to ensure that the filling parameters such as temperature and pressure during the filling process do not exceed the corresponding boundary conditions. The built-in system of the test device is used to check and verify whether the parameters selected by the hydrogen filling machine to stop filling are appropriate and whether they meet the requirements of the SAE J2601 filling protocol. Alternatively, through the control panel, abnormal filling parameters are manually set, and abnormal signals are sent to the hydrogen filling machine, so that the filling parameters such as temperature and pressure during the filling process exceed the corresponding boundary conditions, and check whether the hydrogen filling machine can identify the fault mode and make a judgment, and stop filling.

[0159] The hydrogen filling machine pressure tolerance range test, during the main filling period, the built-in infrared transmitter of the 3-hydrogen filling port sends a hydrogen filling signal to the hydrogen filling machine, and the built-in system of the test device is used to check and verify whether the pipeline pressure drop between the hydrogen filling machine pressure measurement position and the on-board hydrogen storage simulation module of the test device exceeds 2-20MPa. If it exceeds the above range, stop filling within 5s. Or through the control panel, manually set abnormal filling parameters, send abnormal signals to the hydrogen filling machine, so that the pipeline pressure drop exceeds the corresponding boundary conditions during the filling process, and check whether the hydrogen filling machine can identify the fault mode and make a judgment, and then stop filling.

[0160] Frequent start-stop judgment function verification, the built-in infrared transmitter of the 3-hydrogenation port sends a hydrogen filling signal to the hydrogenation machine, and the built-in system of the test device checks and verifies whether the hydrogenation flow of the hydrogenation machine is reduced to less than 1% (0.6g / s) of the maximum flow for more than 10 times. If it exceeds 10 times, stop filling within 5s. Or through the control panel, manually set abnormal filling parameters, send abnormal signals to the hydrogenation machine, so that the number of abnormal hydrogenation flow during the filling process exceeds 10 times, check whether the hydrogenation machine can identify the fault mode and make a judgment, and stop filling.

[0161] S17. All valves are in the closed state, and the function of the hydrogenation machine equipped with a 70MPa hydrogenation gun is verified.

[0162] S18, open the 6-stop valve, open the 11-stop valve, and use a 12-70MPa mass flow meter for measurement.

[0163] Accordingly, the following operations are further performed for the 5-hydrogenation port:

[0164] S19. Connect the hydrogenation gun to the 5-hydrogenation port. After confirming that the connection is correct, establish infrared communication from the hydrogenation machine to the 5-hydrogenation port and check whether the following conditions are met.

[0165] S1901. Check at the physical level whether effective communication conditions are available.

[0166] S1902: The test device does not send a request for a termination signal.

[0167] S1903. The deviation between the volume of the on-board hydrogen storage simulation module of the communication transmission detection device and the volume of the on-board hydrogen storage system measured by the hydrogen filling machine is within 15%.

[0168] S1904. After considering the influence of sensor and system calculation deviations, the initial pressure of the on-board hydrogen storage simulation module of the communication transmission detection device is consistent with the initial pressure measured by the hydrogen filling machine.

[0169] S20, after the hydrogenator receives the signal through the infrared receiver of the hydrogenator gun, the hydrogenator sends a pulse pressure signal to the detection device 5-hydrogenation port to perform a leak detection in the initial connection state.

[0170] S20, initial leakage detection function verification, through the operation panel, manually set the pressure signal abnormality, check and verify whether the hydrogenation machine stops operating, and report the leakage fault.

[0171] S22, communication function verification, through the operation panel, manually cut off the communication, set it to 5-hydrogenation port infrared signal transmission module signal loss failure, check and verify whether the hydrogenation machine stops operating or switches to the non-communication filling state.

[0172] S23. After the communication and leakage functions are verified, the filling process fault detection verification is started to detect whether the hydrogen filling machine meets the initial conditions of the filling protocol and perform action verification; including the following operations.

[0173] The maximum on-board hydrogen storage tank pressure test detects the pressure of the on-board hydrogen storage simulation module of the test device, and sends the pressure signal to the hydrogen filling machine through the built-in infrared signal transmission device of the 5-hydrogen filling port, or manually sends a virtual pressure signal to the hydrogen filling machine through the control panel, and the hydrogen filling machine takes action after judgment. When the pressure of the on-board hydrogen storage simulation module of the test device is greater than 87.5MPa, the hydrogen filling machine will not perform the filling action.

[0174] The maximum hydrogen temperature test of the on-board hydrogen storage bottle detects the temperature of the on-board hydrogen storage simulation module of the test device, and sends the temperature signal to the hydrogen filling machine through the built-in infrared signal transmission device of the 5-hydrogen filling port, or manually sends a virtual temperature signal to the hydrogen filling machine through the control panel, and the hydrogen filling machine takes action after judgment. When the temperature of the on-board hydrogen storage simulation module of the test device is greater than 85°C, the hydrogen filling machine will not perform the filling action.

[0175] The minimum initial pressure test of the on-board hydrogen storage bottle detects the pressure of the on-board hydrogen storage simulation module of the test device, and sends the pressure signal to the hydrogen filling machine through the built-in infrared signal transmission device of the 5-hydrogen filling port, or manually sends a virtual pressure signal to the hydrogen filling machine through the control panel, and the hydrogen filling machine takes action after judgment. When the pressure of the on-board hydrogen storage simulation module of the test device is less than 0.5MPa, the hydrogen filling machine does not perform the filling action.

[0176] The maximum initial pressure test of the on-board hydrogen storage bottle detects the pressure of the on-board hydrogen storage simulation module of the test device, and sends the pressure signal to the hydrogen filling machine through the built-in infrared signal transmission device of the 5-hydrogen filling port, or manually sends a virtual pressure signal to the hydrogen filling machine through the control panel, and the hydrogen filling machine takes action after judgment. When the pressure of the on-board hydrogen storage simulation module of the test device is greater than the nominal working pressure of the hydrogen filling machine, that is, 70MPa, the hydrogen filling machine will not perform the filling action.

[0177] S24. After the initial status check function is verified, the filling process filling protocol detection function verification is started. This function mainly verifies whether the hydrogen refueling machine can select the appropriate filling protocol table according to the pressure category, precooling temperature, communication mode and the size of the on-board hydrogen bottle, and select the appropriate average pressure increase rate (APRR) and pressure parameters; including the following operations.

[0178] The filling table category selection function verification is that the built-in infrared transmitter of the 5-hydrogen filling port sends a hydrogen filling signal to the hydrogen filling machine. The hydrogen filling machine selects the filling table according to its own pressure level, the hydrogen output temperature of the hydrogen filling machine, the volume of the on-board hydrogen storage simulation module of the test device, and the communication method. The built-in system of the test device is used to check and verify whether the filling table selected by the hydrogen filling machine is appropriate and whether it meets the requirements of the SAE J2601 filling protocol. Alternatively, through the control panel, abnormal temperature, volume, communication method, etc. are manually set, and abnormal signals are sent to the hydrogen filling machine to check whether the hydrogen filling machine can identify the fault mode and make a judgment response.

[0179] The APRR selection function is verified by sending a hydrogen filling signal from the built-in infrared transmitter of the 5-hydrogen filling port to the hydrogen filling machine. The hydrogen filling machine selects the appropriate APRR according to the filling table and ambient temperature to ensure that the filling parameters such as temperature and pressure during the filling process do not exceed the corresponding boundary conditions. The built-in system of the test device is used to check and verify whether the APRR selected by the hydrogen filling machine is appropriate and whether it complies with the requirements of the SAEJ2601 filling protocol. Alternatively, an abnormal APRR is manually set through the control panel, and an abnormal signal is sent to the hydrogen filling machine, so that the filling parameters such as temperature and pressure during the filling process exceed the corresponding boundary conditions, and check whether the hydrogen filling machine can identify the fault mode and make a judgment response.

[0180] After the pressure selection correctness test is completed, the built-in infrared transmitter of the 5-hydrogen filling port sends a hydrogen filling signal to the hydrogen filling machine. The hydrogen filling machine selects the stop filling parameters according to the filling pressure, target pressure, and the status of the on-board hydrogen storage simulation module to ensure that the filling parameters such as temperature and pressure during the filling process do not exceed the corresponding boundary conditions. The built-in system of the test device is used to check and verify whether the parameters selected by the hydrogen filling machine to stop filling are appropriate and whether they meet the requirements of the SAE J2601 filling protocol. Alternatively, through the control panel, abnormal filling parameters are manually set, and abnormal signals are sent to the hydrogen filling machine, so that the filling parameters such as temperature and pressure during the filling process exceed the corresponding boundary conditions, and check whether the hydrogen filling machine can identify the fault mode and make a judgment, and stop filling.

[0181] The hydrogen filling machine pressure tolerance range test, during the main filling period, the built-in infrared transmitter of the 5-hydrogen filling port sends a hydrogen filling signal to the hydrogen filling machine, and the built-in system of the test device is used to check and verify whether the pipeline pressure drop between the hydrogen filling machine pressure measurement position and the on-board hydrogen storage simulation module of the test device exceeds 2-20MPa. If it exceeds the above range, the filling is stopped within 5s. Alternatively, the abnormal filling parameters are manually set through the control panel, and the abnormal signal is sent to the hydrogen filling machine, so that the pipeline pressure drop exceeds the corresponding boundary conditions during the filling process, and the hydrogen filling machine can be checked to see whether it can identify the fault mode and make a judgment, and then stop the filling.

[0182] Frequent start-stop judgment function verification, the built-in infrared transmitter of the 5-hydrogenation port sends a hydrogen filling signal to the hydrogenation machine, and the built-in system of the test device checks and verifies whether the hydrogenation flow of the hydrogenation machine is reduced to less than 1% (0.6g / s) of the maximum flow for more than 10 times. If it exceeds 10 times, stop filling within 5s. Or through the control panel, manually set abnormal filling parameters, send abnormal signals to the hydrogenation machine, so that the number of abnormal hydrogenation flow during the filling process exceeds 10 times, check whether the hydrogenation machine can identify the fault mode and make a judgment, and stop filling.

[0183] S25, hydrogen venting. When the hydrogen in the 15-hydrogen storage bottle group is full or the hydrogen in the 15-hydrogen storage bottle is overheated, it can be observed through the 13-pressure sensor and the 14-temperature sensor. At this time, for safety reasons, the hydrogen in the 15-hydrogen storage bottle needs to be vented, all valves in the system are closed, and the 21-hand valve is opened. The hydrogen in the 15-hydrogen storage bottle is vented through the pipeline and the 22-flame arrester.

[0184] S26, nitrogen replacement. Close all valves in the system and open the 9-stop valve.

[0185] Open the 11-stop valve, slowly open the 17-purge stop valve, and the purge nitrogen enters the main pipeline system from the 16-nitrogen cylinder group through the 17-purge stop valve, 18-pressure regulating valve and 19-second check valve. After the value of the 13-pressure sensor is stable, close the 17-purge stop valve and maintain the pressure for 3 minutes. Open the 21-stop valve and 20-stop valve, vent the replacement gas, and close the 21-stop valve and 20-stop valve. Nitrogen replacement is completed once. Replace 5 times according to the above steps, and the replacement is completed.

[0186] S27, hydrogen replacement. Close all valves in the system, open the 9-stop valve, open the 11-stop valve, slowly open the 24-replacement stop valve, and the replacement hydrogen enters the main pipeline system from the 23-hydrogen cylinder group through the 24-replacement stop valve, 18-pressure regulating valve and 19-second check valve. After the value of the 13-pressure sensor is stable, close the 24-replacement stop valve and maintain the pressure for 3 minutes. Open the 21-stop valve and 20-stop valve, vent the replacement gas, and close the 21-stop valve and 20-stop valve. The hydrogen replacement is completed once. Replace 5 times according to the above steps, and the replacement is completed.

[0187] Among them, the function of 7-the first one-way valve is to prevent the 70MPa high-pressure hydrogen from 5-hydrogenation port from flowing back to 1-hydrogenation port and 3-hydrogenation port; 8-the filter is mainly used to filter impurities in the hydrogen.

[0188] The present invention provides a hydrogen filling function detection device and method for a hydrogen filling station. The device can be used to test and verify the filling and metering functions of the hydrogen filling station, solving the problem that the communication standard, filling protocol and metering function of the hydrogen filling machine of the hydrogen filling station cannot be verified.

[0189] In the hydrogen filling station filling function detection device provided in the embodiment of the present invention, each module or unit structure can be operated independently or in combination according to the actual structural setting requirements and the actual test processing requirements to achieve corresponding technical effects.

[0190] Embodiment 2

[0191] The system is described in detail in the embodiments disclosed in the above invention. Based on other aspects of the system described in any one or more embodiments, the present invention also provides a method for detecting the filling function of a hydrogen refueling station, which is applied to the device for detecting the filling function of a hydrogen refueling station described in any one or more embodiments. Specific embodiments are given below for detailed description.

[0192] Specifically, Figure 4 The flowchart of the method for detecting the filling function of a hydrogen filling station provided in an embodiment of the present invention is shown in FIG. Figure 4 As shown, the method includes:

[0193] For each hydrogenation port, open the stop valve of its output pipeline, open the stop valve of the corresponding mass flow meter input pipeline, and start the mass flow meter;

[0194] Connect the matching hydrogenation gun to the current hydrogenation port, and after confirming that the connection is correct, establish infrared communication between the hydrogenation machine and the current hydrogenation port, and make sure that the hydrogenation machine receives the signal through the hydrogenation gun infrared receiver;

[0195] Set the abnormal communication status through the operation panel to verify whether the hydrogen filling machine stops working or switches to the non-communication filling state to realize communication function verification;

[0196] After the communication detection function is verified, the filling process fault detection verification begins to detect whether the hydrogen filling machine meets the initial conditions of the filling protocol and perform action verification;

[0197] After the initial state function verification, the filling process filling protocol detection function verification is started to verify whether the hydrogen refueling machine can select the appropriate filling protocol table according to the pressure category, precooling temperature, communication mode and the size of the on-board hydrogen bottle, and select the appropriate average boost rate and pressure parameters;

[0198] When the hydrogen in the hydrogen storage bottle group is full or the hydrogen in the hydrogen storage bottle is over-temperature, the second release stop valve is opened, and other valves in the device are closed to release the hydrogen in the hydrogen storage bottle through the pipeline and the flame arrester;

[0199] Open the stop valve at the flow meter input end, slowly open the purge stop valve, and introduce nitrogen. After the pressure gauge value stabilizes, close the purge stop valve, maintain the pressure for the set time, open the vent stop valve, vent the replacement gas, and then close the vent stop valve; repeat the above operation for the set number of purging times to complete the nitrogen replacement purging;

[0200] Open the stop valve at the flow meter input end, slowly open the replacement stop valve, and introduce hydrogen. After the pressure gauge value stabilizes, close the replacement stop valve, maintain the pressure for the set time, open the release stop valve, release the replacement gas, and then close the release stop valve; repeat the above operation for the set replacement times to complete the hydrogen replacement;

[0201] Repeat the above operation to implement filling function test for hydrogen filling ports of different specifications and matching hydrogen filling machines.

[0202] Taking 1-hydrogen filling port as an example, when using the hydrogen filling station filling function detection device of the present invention to perform detection, the detection operation is carried out according to the following operations and precautions:

[0203] S1. Before the first use, all valves are in the closed state, and the hydrogenation machine equipped with 35MPa, TN1 hydrogenation gun is functionally verified.

[0204] S2. Open the 2-stop valve, open the 9-stop valve, and use a 10-35MPa mass flow meter for measurement.

[0205] S3. Connect the hydrogenation gun to the 1-hydrogenation port. After confirming that the connection is correct, establish infrared communication from the hydrogenation machine to the 1-hydrogenation port and check whether the following conditions are met.

[0206] S301. Check at the physical level whether effective communication conditions are available.

[0207] S302: The testing device does not send a request for a termination signal.

[0208] S303. The deviation between the volume of the on-board hydrogen storage simulation module of the communication transmission detection device and the volume of the on-board hydrogen storage system measured by the hydrogen filling machine is within 15%.

[0209] S304. After considering the influence of sensor and system calculation deviations, the initial pressure of the on-board hydrogen storage simulation module of the communication transmission detection device is consistent with the initial pressure measured by the hydrogen filling machine.

[0210] S6. After the hydrogen filling machine receives the signal through the infrared receiver of the hydrogen filling gun, it performs communication function verification. Through the operation panel, the communication is manually cut off and set to 1-the signal loss failure of the built-in infrared receiver of the hydrogen filling port to check and verify whether the hydrogen filling machine stops operating or switches to the non-communication filling state.

[0211] S7. After the communication and leakage functions are verified, the filling process fault detection verification is started to detect whether the hydrogen filling machine meets the initial conditions of the filling protocol and perform action verification.

[0212] S701, maximum on-board hydrogen storage tank pressure test, detect the pressure of the on-board hydrogen storage simulation module of the test device, and send the pressure signal to the hydrogen filling machine through the built-in infrared signal transmission device of the 1-hydrogen filling port, or send a virtual pressure signal to the hydrogen filling machine through the control panel, and the hydrogen filling machine will act after judgment. When the pressure of the on-board hydrogen storage simulation module of the test device is greater than 43.75MPa, the hydrogen filling machine will not perform the filling action.

[0213] S702, the maximum hydrogen temperature test of the on-board hydrogen storage bottle, detects the temperature of the on-board hydrogen storage simulation module of the test device, and sends the temperature signal to the hydrogen filling machine through the built-in infrared signal transmission device of the 1-hydrogen filling port, or manually sends a virtual temperature signal to the hydrogen filling machine through the control panel, and the hydrogen filling machine takes action after judgment. When the temperature of the on-board hydrogen storage simulation module of the test device is greater than 85°C, the hydrogen filling machine does not perform the filling action.

[0214] S703, the minimum initial pressure test of the on-board hydrogen storage bottle, detects the pressure of the on-board hydrogen storage simulation module of the test device, and sends the pressure signal to the hydrogen filling machine through the 1-hydrogen filling port infrared signal transmission device, or manually sends a virtual pressure signal to the hydrogen filling machine through the control panel, and the hydrogen filling machine takes action after judgment. When the pressure of the on-board hydrogen storage simulation module of the test device is less than 0.5MPa, the hydrogen filling machine does not perform the filling action.

[0215] S704, the maximum initial pressure test of the on-board hydrogen storage bottle, detects the pressure of the on-board hydrogen storage simulation module of the test device, and sends the pressure signal to the hydrogen filling machine through the 1-hydrogen filling port infrared signal transmission device, or manually sends a virtual pressure signal to the hydrogen filling machine through the control panel, and the hydrogen filling machine takes action after judgment. When the pressure of the on-board hydrogen storage simulation module of the test device is greater than the nominal working pressure of the hydrogen filling machine, that is, 35MPa, the hydrogen filling machine does not perform the filling action.

[0216] S8. After the initial status check function is verified, the filling process filling protocol detection function verification begins. This function mainly verifies whether the hydrogen refueling machine can select the appropriate filling protocol table according to the pressure category, precooling temperature, communication mode and the size of the on-board hydrogen bottle, and select the appropriate average pressure increase rate (APRR) and pressure parameters. The operations of this verification process include:

[0217] The filling table category selection function verification is that the built-in infrared transmitter of the 1-hydrogen filling port sends a hydrogen filling signal to the hydrogen filling machine. The hydrogen filling machine selects the filling table according to its own pressure level, hydrogen output temperature of the hydrogen filling machine, volume of the hydrogen storage system of the test device, and communication mode. The built-in system of the test device is used to check and verify whether the filling table selected by the hydrogen filling machine is appropriate and whether it complies with the requirements of the SAEJ2601 filling protocol. Alternatively, through the control panel, abnormal temperature, volume, communication mode, etc. are manually set, and abnormal signals are sent to the hydrogen filling machine to check whether the hydrogen filling machine can identify the fault mode and make a judgment response.

[0218] The APRR selection function is verified by sending a hydrogen filling signal from the built-in infrared transmitter of the 1-hydrogen filling port to the hydrogen filling machine. The hydrogen filling machine selects the appropriate APRR according to the filling table and ambient temperature to ensure that the filling parameters such as temperature and pressure during the filling process do not exceed the corresponding boundary conditions. The built-in system of the test device is used to check and verify whether the APRR selected by the hydrogen filling machine is appropriate and whether it complies with the requirements of the SAEJ2601 filling protocol. Alternatively, an abnormal APRR is manually set through the control panel, and an abnormal signal is sent to the hydrogen filling machine, so that the filling parameters such as temperature and pressure during the filling process exceed the corresponding boundary conditions, and check whether the hydrogen filling machine can identify the fault mode and make a judgment response.

[0219] After the pressure selection correctness test is completed, the built-in infrared transmitter of the 1-hydrogen filling port sends a hydrogen filling signal to the hydrogen filling machine. The hydrogen filling machine selects the stop filling parameters according to the filling pressure, target pressure, and the status of the on-board hydrogen storage simulation module to ensure that the filling parameters such as temperature and pressure during the filling process do not exceed the corresponding boundary conditions. The built-in system of the test device is used to check and verify whether the parameters selected by the hydrogen filling machine to stop filling are appropriate and whether they meet the requirements of the SAE J2601 filling protocol. Alternatively, through the control panel, abnormal filling parameters are manually set, and abnormal signals are sent to the hydrogen filling machine, so that the filling parameters such as temperature and pressure during the filling process exceed the corresponding boundary conditions, and check whether the hydrogen filling machine can identify the fault mode and make a judgment, and stop filling.

[0220] The hydrogen filling machine pressure tolerance range test, during the main filling period, the built-in infrared transmitter of the 1-hydrogen filling port sends a hydrogen filling signal to the hydrogen filling machine, and the built-in system of the test device is used to check and verify whether the pipeline pressure drop between the hydrogen filling machine pressure measurement position and the on-board hydrogen storage simulation module of the test device exceeds 2-20MPa. If it exceeds the above range, the filling is stopped within 5s. Alternatively, the abnormal filling parameters are manually set through the control panel, and the abnormal signal is sent to the hydrogen filling machine, so that the pipeline pressure drop exceeds the corresponding boundary conditions during the filling process, and the hydrogen filling machine can be checked to see whether it can identify the fault mode and make a judgment, and then stop the filling.

[0221] Frequent start-stop judgment function verification, the built-in infrared transmitter of the hydrogen filling port 1 sends a hydrogen filling signal to the hydrogen filling machine, and the built-in system of the test device checks and verifies whether the hydrogen filling flow of the hydrogen filling machine is reduced to less than 1% (0.6g / s) of the maximum flow for more than 10 times. If it exceeds 10 times, stop filling within 5s. Or through the control panel, manually set abnormal filling parameters, send abnormal signals to the hydrogen filling machine, so that the number of abnormal hydrogen filling flow during the filling process exceeds 10 times, check whether the hydrogen filling machine can identify the fault mode and make a judgment, and stop filling.

[0222] All valves of S9 are in the closed state, which is the function verification of the hydrogenation machine equipped with 35MPa and TN5 hydrogenation gun.

[0223] S10 opens the 2-stop valve, opens the 9-stop valve, and uses a 10-35MPa mass flow meter for measurement.

[0224] The hydrogen filling station filling function detection device includes: an operation control module, an on-board hydrogen storage simulation module, a hydrogen release module, a hydrogen supply module, a nitrogen purge module, a hydrogen replacement module, a weighing and metering module, and a skid-mounted carrier module;

[0225] The operation control module includes a control unit and an operation panel, on which are integrated display instruments for the hydrogenation port, a built-in infrared emitter of the hydrogenation port, key valves, and a touch interactive screen;

[0226] The operation panel and the control unit are connected in communication, and the operation panel and the control unit cooperate to generate different control signals according to the needs of the staff;

[0227] The control unit is communicatively connected with a hydrogen storage controller of a hydrogen filling function detection device of a hydrogen filling station under test;

[0228] The on-board hydrogen storage simulation module is used to simulate the on-board hydrogen storage system of different vehicle models, and is connected to the hydrogen filling port of the hydrogen supply module through the filling main line. The on-board hydrogen storage simulation module is equipped with a hydrogen storage bottle group, a hydrogen storage bottle installation frame, and a hydrogen storage controller;

[0229] The nitrogen purge module and the hydrogen replacement module are connected to the main pipeline via a pressure regulating valve and a second one-way valve;

[0230] The hydrogen release module is connected to the main pipeline via a stop valve and is configured to use a flame arrester to release hydrogen in the device pipeline.

[0231] Preferably, in one embodiment, the hydrogenation port comprises one or more 35MPa hydrogenation ports and one or more 70MPa hydrogenation ports, the 35MPa hydrogenation ports and the 70MPa hydrogenation ports are arranged in parallel pipelines, and each hydrogenation port adopts an independent output pipeline and is independently provided with a shut-off valve.

[0232] Furthermore, in one embodiment, a main pipe between the hydrogen filling port and the on-board hydrogen storage simulation module is provided with a hydrogen filling port output stop valve, a first one-way valve (7) and a filter (8) in sequence;

[0233] The first one-way valve is used to prevent the 70MPa high-pressure hydrogen from flowing back to the 35MPa hydrogenation port; the filter is used to filter impurities in the hydrogen.

[0234] In an optional embodiment, the on-board hydrogen storage simulation module is also configured with a mass flow meter, which is connected to the output end of the filter and includes a 35MPa mass flow meter and a 70MPa mass flow meter.

[0235] In one embodiment, the 35 MPa mass flowmeter and the 70 MPa mass flowmeter are arranged through parallel pipelines, and stop valves are independently arranged at the input ends of the respective pipelines.

[0236] Furthermore, in one embodiment, the on-board hydrogen storage simulation module is also configured with a pressure gauge (13) and a temperature sensor (14), and the hydrogen storage bottle group is connected to the output end of the mass flow meter via the temperature sensor and the pressure gauge. During the test, the pressure and temperature of the hydrogen storage bottle group are monitored in real time, so that when the pressure or temperature is abnormal, the hydrogen release module is started to release the hydrogen in the hydrogen storage bottle group and the pipeline.

[0237] In actual application, in one embodiment, the vehicle-mounted hydrogen storage simulation module uses a sequential control valve group to simulate the volume of hydrogen storage containers of different vehicle models. The sequential control valve group includes a sequential control valve group bracket, a high-pressure solenoid valve and a medium-pressure needle valve. The high-pressure solenoid valve realizes the automatic shut-off function of the sequential control valve group, and the medium-pressure needle valve is used to control the on-off of the release pipeline according to the release demand.

[0238] Preferably, in one embodiment, the nitrogen purge module is equipped with a nitrogen bottle installation position, a nitrogen bottle group and a nitrogen hose. The nitrogen bottle group is connected to the main pipeline system via a purge stop valve (17), a pressure regulating valve (18) and a second one-way valve (19), and cooperates with the pressure regulating valve control command input from the operation panel to provide a nitrogen purge function for the equipment.

[0239] On the other hand, in one embodiment, the hydrogen replacement module is equipped with a hydrogen cylinder installation position and a hydrogen cylinder group, and the hydrogen cylinder group is connected to the main pipeline system via a replacement stop valve (24), a pressure regulating valve (18) and a second one-way valve (19), and cooperates with the pressure regulating valve control command input by the operation panel to provide hydrogen replacement service for the equipment.

[0240] Optionally, in one embodiment, the hydrogen release module is arranged outside the skid-mounted carrier module, includes a hydrogen cylinder group, is connected to the main pipeline system via a first release stop valve (20), and is also connected to the hydrogen release pipeline of the on-board hydrogen storage simulation module through a hose via a second release stop valve (21) for discharging hydrogen.

[0241] Furthermore, in one embodiment, the hydrogen release module is connected to the input end of the first one-way valve of the main pipeline through a first release stop valve, and the hydrogen release module is connected to the input end of the pressure gauge (13) in the vehicle-mounted hydrogen storage simulation module through a second release stop valve.

[0242] In a preferred embodiment, the weighing and metering module is communicatively connected to the flow transmitter of the control unit, and is used to verify the metering function during the hydrogen filling process of the hydrogen filling machine based on the monitoring data of the mass flow meter in the on-board hydrogen storage simulation module.

[0243] In an optional embodiment, the environmental parameter monitoring module is communicatively connected to the operation control module, and includes a parameter acquisition unit and a monitoring processing unit, which are used to perform all-round monitoring of the internal environment of the device to ensure test safety; the parameter acquisition unit includes a hydrogen concentration detector, a flame detector and an ambient temperature sensor with explosion-proof properties; the detection processing unit includes an audible and visual alarm, an emergency stop button and an explosion-proof exhaust fan.

[0244] Optionally, in one embodiment, the skid-mounted transport module is used to provide a transport tool for each module in the skid; a waterproof box is provided, and different functional partitions are arranged inside the box to facilitate partition maintenance by testers, and ventilation windows are arranged at the front, back and top of the box.

[0245] For the aforementioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, some steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0246] It should be pointed out that in other embodiments of the present invention, the method can also obtain a new hydrogen station filling function detection method by combining one or several of the above embodiments to achieve accurate and comprehensive detection and optimization of the hydrogen station filling function.

[0247] Embodiment three:

[0248] The present invention also provides a method for detecting the filling function of a hydrogen refueling station, which is applied to the device for detecting the filling function of a hydrogen refueling station described in any one or more of the above embodiments. Specific embodiments are given below for detailed description.

[0249] Specifically, Figure 5 The flowchart of the method for detecting the filling function of a hydrogen filling station provided in an embodiment of the present invention is shown in FIG. Figure 5 As shown, the method includes:

[0250] For each hydrogenation port, open the stop valve of its output pipeline, open the stop valve of the corresponding mass flow meter input pipeline, and start the mass flow meter;

[0251] Connect the matching hydrogenation gun to the current hydrogenation port, and after confirming that the connection is correct, establish infrared communication between the hydrogenation machine and the current hydrogenation port. After the hydrogenation machine receives the signal through the hydrogenation gun infrared receiver, the hydrogenation machine sends a pulse pressure signal to the current hydrogenation port of the detection device;

[0252] Based on the initial connection status, set the pressure signal abnormality through the operation panel to check and verify whether the hydrogenation machine effectively stops working and reports the leakage fault, so as to realize the initial leakage detection function verification;

[0253] Set the abnormal communication status through the operation panel to verify whether the hydrogen filling machine stops working or switches to the non-communication filling state to realize communication function verification;

[0254] After the leakage and communication detection functions are verified, the filling process fault detection verification begins to detect whether the hydrogen filling machine meets the initial conditions of the filling protocol and perform action verification;

[0255] After the initial state function verification, the filling process filling protocol detection function verification is started to verify whether the hydrogen refueling machine can select the appropriate filling protocol table according to the pressure category, precooling temperature, communication mode and the size of the on-board hydrogen bottle, and select the appropriate average boost rate and pressure parameters;

[0256] When the hydrogen in the hydrogen storage bottle group is full or the hydrogen in the hydrogen storage bottle is over-temperature, the second release stop valve is opened, and other valves in the device are closed to release the hydrogen in the hydrogen storage bottle through the pipeline and the flame arrester;

[0257] Open the stop valve at the flow meter input end, slowly open the purge stop valve, and introduce nitrogen. After the pressure gauge value stabilizes, close the purge stop valve, maintain the pressure for the set time, open the vent stop valve, vent the replacement gas, and then close the vent stop valve; repeat the above operation for the set number of purging times to complete the nitrogen replacement purging;

[0258] Open the stop valve at the flow meter input end, slowly open the replacement stop valve, and introduce hydrogen. After the pressure gauge value stabilizes, close the replacement stop valve, maintain the pressure for the set time, open the release stop valve, release the replacement gas, and then close the release stop valve; repeat the above operation for the set replacement times to complete the hydrogen replacement;

[0259] Repeat the above operation to implement filling function test for hydrogen filling ports of different specifications and matching hydrogen filling machines.

[0260] Embodiment 6 is a variation of Embodiment 5, so the steps that are the same or similar to those of Embodiment 5 will not be described in detail, and only the differences will be described.

[0261] This embodiment provides

[0262] S4. After the hydrogenator receives the signal through the infrared receiver of the hydrogenator gun, the hydrogenator sends a pulse pressure signal to the detection device 1-hydrogenation port to perform leak detection in the initial connection state.

[0263] S5. Initial leakage detection function verification: through the operation panel, manually set the pressure signal abnormality, check and verify whether the hydrogenation machine stops operating and reports the leakage fault.

[0264] After the initial connection status leak detection is passed, the communication function verification is further performed. Through the operation panel, the communication is manually cut off and set to 1-the built-in infrared receiver signal loss fault of the hydrogen filling port to check and verify whether the hydrogen filling machine stops working or switches to a non-communication filling state. This embodiment performs an airtightness test on the device after the initial connection, which can effectively avoid the data error caused by the abnormal airtightness of the initial connection mechanism from interfering with the data of the hydrogen injection detection, thereby fundamentally ensuring the accuracy of the test results. It should be noted that based on the method in any one or more of the above embodiments of the present invention, the present invention also provides a storage medium, on which is stored a program code that can implement the method described in any one or more of the embodiments, and when the code is executed by the operating system, it can implement the hydrogen filling station filling function detection method as described above.

[0265] It should be understood that the embodiments disclosed in the present invention are not limited to the specific structures, processing steps or materials disclosed herein, but should be extended to equivalent substitutions of these features understood by ordinary technicians in the relevant field. It should also be understood that the terms used herein are only used for the purpose of describing specific embodiments and are not meant to be limiting.

[0266] The "one embodiment" mentioned in the specification means that a particular feature, structure or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present invention. Therefore, the phrase "one embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0267] Although the embodiments disclosed in the present invention are as above, the above contents are only embodiments adopted for facilitating the understanding of the present invention and are not intended to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. A hydrogen filling station filling function detection device, characterized in that: The device comprises: an operation control module, an on-board hydrogen storage simulation module, a hydrogen release module, a hydrogen supply module, a nitrogen purge module, a hydrogen replacement module, a weighing and metering module and a skid-mounted transport module; The operation control module includes a control unit and an operation panel, on which are integrated display instruments for the hydrogenation port, a built-in infrared emitter of the hydrogenation port, key valves, and a touch interactive screen; The operation panel and the control unit are connected in communication, and the operation panel and the control unit cooperate to generate different control signals according to the needs of the staff; The control unit is communicatively connected with a hydrogen storage controller of a hydrogen filling function detection device of a hydrogen filling station under test; The on-board hydrogen storage simulation module is used to simulate the on-board hydrogen storage system of different vehicle models, and is connected to the hydrogen filling port of the hydrogen supply module through the filling main line. The on-board hydrogen storage simulation module is equipped with a hydrogen storage bottle group, a hydrogen storage bottle installation frame, and a hydrogen storage controller; The nitrogen purge module and the hydrogen replacement module are connected to the main pipeline via a pressure regulating valve and a second one-way valve; The hydrogen release module is connected to the main pipeline via a stop valve and is configured to use a flame arrester to release hydrogen in the device pipeline.

2. The device according to claim 1, characterized in that The hydrogenation ports include one or more 35MPa hydrogenation ports and one or more 70MPa hydrogenation ports. The 35MPa hydrogenation ports and the 70MPa hydrogenation ports are arranged in parallel pipelines. Each hydrogenation port adopts an independent output pipeline and is independently provided with a shut-off valve.

3. The device according to claim 2, characterized in that A hydrogenation port output shut-off valve, a first one-way valve (7) and a filter (8) are sequentially arranged on the main pipe between the hydrogenation port and the on-board hydrogen storage simulation module; the first one-way valve is used to prevent 70MPa high-pressure hydrogen from flowing back to the 35MPa hydrogenation port; and the filter is used to filter impurities in the hydrogen.

4. The device according to claim 1, characterized in that The on-vehicle hydrogen storage simulation module is also equipped with a mass flow meter, which is connected to the output end of the filter and includes a 35MPa mass flow meter and a 70MPa mass flow meter.

5. The device according to claim 4, characterized in that The 35MPa mass flowmeter and the 70MPa mass flowmeter are arranged through parallel pipelines, and stop valves are independently arranged at the input ends of their respective pipelines.

6. The device according to claim 1, characterized in that The on-board hydrogen storage simulation module is also equipped with a pressure gauge (13) and a temperature sensor (14). The hydrogen storage bottle group is connected to the output end of the mass flow meter via the temperature sensor and the pressure gauge. During the test, the pressure and temperature of the hydrogen storage bottle group are monitored in real time, so that the hydrogen release module is activated to release the hydrogen in the hydrogen storage bottle group and the pipeline when the pressure or temperature is abnormal.

7. The device according to claim 1, characterized in that The on-board hydrogen storage simulation module adopts a sequential control valve group to simulate the volume of hydrogen storage containers of different vehicle models. The sequential control valve group includes a sequential control valve group bracket, a high-pressure solenoid valve and a medium-pressure needle valve. The high-pressure solenoid valve realizes the automatic shut-off function of the sequential control valve group, and the medium-pressure needle valve is used to control the on-off of the release pipeline according to the release demand.

8. The device according to claim 1, characterized in that The nitrogen purge module is equipped with a nitrogen bottle installation position, a nitrogen bottle group and a nitrogen hose. The nitrogen bottle group is connected to the main pipeline system through a purge stop valve (17), a pressure regulating valve (18) and a second one-way valve (19), and cooperates with the pressure regulating valve control command input from the operation panel to provide a nitrogen purge function for the equipment.

9. The device according to claim 1, characterized in that The hydrogen replacement module is equipped with a hydrogen bottle installation position and a hydrogen bottle group. The hydrogen bottle group is connected to the main pipeline system via a replacement stop valve (24), a pressure regulating valve (18) and a second one-way valve (19), and cooperates with the pressure regulating valve control command input by the operation panel to provide hydrogen replacement service for the equipment.

10. The device according to claim 1, characterized in that The hydrogen release module is arranged outside the skid-mounted carrier module, and comprises a hydrogen cylinder group, which is connected to the main pipeline system via a first release stop valve (20), and is also connected to the hydrogen release pipeline of the on-board hydrogen storage simulation module via a second release stop valve (21) through a hose, for discharging hydrogen.

11. The device according to claim 1, characterized in that The hydrogen release module is connected to the input end of the first one-way valve of the main pipeline through a first release stop valve, and the hydrogen release module is connected to the input end of the pressure gauge (13) in the vehicle-mounted hydrogen storage simulation module through a second release stop valve.

12. The device according to claim 1, characterized in that The weighing and metering module is communicatively connected with the flow transmitter of the control unit, and is used to verify the metering function during the hydrogen filling process of the hydrogen filling machine based on the monitoring data of the mass flow meter in the on-board hydrogen storage simulation module.

13. The device according to claim 1, characterized in that The environmental parameter monitoring module is communicatively connected to the operation control module, and includes a parameter acquisition unit and a monitoring processing unit, which are used to perform all-round monitoring of the internal environment of the device to ensure test safety; the parameter acquisition unit includes a hydrogen concentration detector, a flame detector and an ambient temperature sensor with explosion-proof properties; the detection processing unit includes an audible and visual alarm, an emergency stop button and an explosion-proof exhaust fan.

14. The device according to claim 1, characterized in that The skid-mounted carrier module is used to provide a carrier for each module in the skid; a waterproof box is provided, and different functional partitions are arranged inside the box to facilitate partition maintenance by testers, and ventilation windows are arranged at the front, back and top of the box.

15. A method for detecting the filling function of a hydrogen filling station, characterized in that: The method is applied to the device according to any one of claims 1 to 14, and the method comprises: For each hydrogenation port, open the stop valve of its output pipeline, open the stop valve of the corresponding mass flow meter input pipeline, and start the mass flow meter; Connect the matching hydrogenation gun to the current hydrogenation port, and after confirming that the connection is correct, establish infrared communication between the hydrogenation machine and the current hydrogenation port. After the hydrogenation machine receives the signal through the hydrogenation gun infrared receiver, the hydrogenation machine sends a pulse pressure signal to the current hydrogenation port of the detection device; Based on the initial connection status, set the pressure signal abnormality through the operation panel to check and verify whether the hydrogenation machine effectively stops working and reports the leakage fault, so as to realize the initial leakage detection function verification; Set the abnormal communication status through the operation panel to verify whether the hydrogen filling machine stops working or switches to the non-communication filling state to realize communication function verification; After the leakage and communication detection functions are verified, the filling process fault detection verification begins to detect whether the hydrogen filling machine meets the initial conditions of the filling protocol and perform action verification; After the initial state function verification, the filling process filling protocol detection function verification is started to verify whether the hydrogen refueling machine can select the appropriate filling protocol table according to the pressure category, precooling temperature, communication mode and the size of the on-board hydrogen bottle, and select the appropriate average boost rate and pressure parameters; When the hydrogen in the hydrogen storage bottle group is full or the hydrogen in the hydrogen storage bottle is over-temperature, the second release stop valve is opened, and other valves in the device are closed to release the hydrogen in the hydrogen storage bottle through the pipeline and the flame arrester; Open the stop valve at the flow meter input end, slowly open the purge stop valve, and introduce nitrogen. After the pressure gauge value stabilizes, close the purge stop valve, maintain the pressure for the set time, open the vent stop valve, vent the replacement gas, and then close the vent stop valve; repeat the above operation for the set number of purging times to complete the nitrogen replacement purging; Open the stop valve at the flow meter input end, slowly open the replacement stop valve, and introduce hydrogen. After the pressure gauge value stabilizes, close the replacement stop valve, maintain the pressure for the set time, open the release stop valve, release the replacement gas, and then close the release stop valve; repeat the above operation for the set replacement times to complete the hydrogen replacement; Repeat the above operation to implement filling function test for hydrogen filling ports of different specifications and matching hydrogen filling machines.

16. A storage medium, characterized in that: The storage medium stores program code for implementing the method as claimed in claim 15.

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