Hydrogen supply system of hydrogen refueling station

Abstract

The embodiment of the utility model provides a hydrogen supply system of a hydrogen refueling station, and relates to the technical field of hydrogen refueling stations. The hydrogen supply system comprises a hydrogen adding machine; the hydrogen supply module is used for supplying hydrogen to the hydrogen adding machine; the hydrogen supply module is communicated with the hydrogen adding machine through the filling pipeline; the compressor is arranged on the filling pipeline and is positioned between the hydrogen supply module and the hydrogen adding machine; and an inlet of the adjusting loop is connected to the filling pipeline located on the outlet side of the compressor, and an outlet of the adjusting loop is connected to the filling pipeline located on the inlet side of the compressor. The hydrogen supply system is favorable for balancing the pressure fluctuation in the system, reducing the influence of pulse gas, stably controlling the pressure and flow of hydrogen supplied to the hydrogenation machine, and improving the hydrogenation efficiency.

Description

Technical Field

[0001] This application relates to the field of hydrogen refueling station technology, and more particularly to a hydrogen supply system for a hydrogen refueling station. Background Technology

[0002] With the promotion and application of hydrogen fuel cell vehicles, the demand for hydrogen refueling stations is also increasing. Hydrogen refueling stations include stationary hydrogen refueling stations and mobile hydrogen refueling stations. Among them, mobile hydrogen refueling stations are flexible hydrogen refueling facilities that can be deployed to different locations according to demand. Mobile hydrogen refueling stations include skid-mounted hydrogen refueling stations.

[0003] Traditional skid-mounted hydrogen refueling stations are designed with a gas source (such as a hydrogen tank trailer), a compressor, and a hydrogen dispenser. During refueling, hydrogen is drawn from the tank trailer, pressurized by the compressor, and then delivered to the user's vehicle through the dispenser's filling port. During the compressor pressurization process, the hydrogen is converted into a pulsed gas stream.

[0004] However, during the hydrogen refueling process, the pressure sensor on the hydrogen refueling machine is often interfered with by the pulsed gas. When the pressure sensor data reaches the shutdown pressure, the hydrogen refueling process ends, but at this time the user's vehicle is not fully refueled, affecting the hydrogen refueling efficiency. Utility Model Content

[0005] This application provides a hydrogen supply system for a hydrogen refueling station, which helps to balance pressure fluctuations within the system, reduce the impact of pulsed gas, stabilize the hydrogen pressure and flow rate supplied to the hydrogen refueling machine, and improve hydrogen refueling efficiency.

[0006] Specifically, this application provides a hydrogen supply system for a hydrogen refueling station, comprising: a hydrogen dispenser; a hydrogen supply module for supplying hydrogen to the hydrogen dispenser; a refueling pipeline, wherein the hydrogen supply module is connected to the hydrogen dispenser via the refueling pipeline; a compressor disposed on the refueling pipeline and located between the hydrogen supply module and the hydrogen dispenser; and a regulating circuit, wherein the inlet of the regulating circuit is connected to the refueling pipeline located on the outlet side of the compressor, and the outlet of the regulating circuit is connected to the refueling pipeline on the inlet side of the compressor.

[0007] In one possible implementation, the hydrogen supply system of the hydrogen refueling station also includes:

[0008] A three-way valve is provided on the filling pipeline on the outlet side of the compressor. The three-way valve is connected to the outlet of the compressor, the hydrogen dispenser, and the inlet of the regulating circuit.

[0009] In one possible implementation, the regulating loop is provided with a flow regulating valve, which is used to control the flow rate in the regulating loop.

[0010] In one possible implementation, the hydrogen supply module includes:

[0011] Hydrogen storage device for storing liquid hydrogen;

[0012] The gas unloading system is connected to the inlet of the hydrogen storage device and the compressor, respectively.

[0013] In one possible implementation, the hydrogen storage device includes a hydrogen tubing vehicle.

[0014] In one possible implementation, the hydrogen supply module further includes a nitrogen cylinder group, and the unloading system is also connected to the nitrogen cylinder group.

[0015] In one possible implementation, the hydrogen refueling machine includes:

[0016] Hydrogenation pipeline;

[0017] A flow meter is installed in the hydrogen refueling pipeline;

[0018] A safety valve is installed in the hydrogenation pipeline and located downstream of the flow meter;

[0019] A hydrogen refueling gun is connected to the end of the hydrogen refueling pipeline and is used to inject hydrogen into the equipment to be refueled.

[0020] In one possible implementation, the hydrogen refueling machine further includes:

[0021] A pressure detection device is installed in the hydrogen refueling pipeline, and the pressure detection device is used to detect the pressure in the hydrogen refueling pipeline.

[0022] In one possible implementation, the pressure P within the hydrogenation pipeline and the opening t of the flow regulating valve satisfy the following:

[0023]

[0024] Where Kp is the proportional coefficient, Ki is the integral coefficient, Kd is the differential coefficient, k>0, b>0.

[0025] In one possible implementation, the hydrogen refueling machine further includes:

[0026] A pneumatic ball valve is located at the connection between the hydrogenation pipeline and the filling pipeline.

[0027] The hydrogen supply system for the hydrogen refueling station provided in this application embodiment, by setting up a regulating loop, can guide a portion of the pressurized hydrogen back to the compressor inlet, forming a controlled internal loop. This loop helps balance pressure fluctuations within the system, reduces the impact of pulsed gas, and thus improves hydrogen refueling efficiency and system stability. In actual operation, hydrogen flows out from the hydrogen supply module, passes through the refueling pipeline, and enters the compressor for pressurization. A portion of the pressurized hydrogen is directly supplied to the hydrogen dispenser for refueling, while the other portion returns to the compressor inlet through the regulating loop, forming an internal loop. By adjusting the gas flow rate in the regulating loop, the amount of hydrogen entering the loop pipeline can be controlled, thereby regulating the hydrogen pressure and flow rate supplied to the hydrogen dispenser.

[0028] Thus, the hydrogen supply system of the hydrogen refueling station provided in this application embodiment can more stably control the hydrogen pressure and flow rate supplied to the hydrogen refueling machine through the coordinated action of the regulating circuit and the compressor, thereby improving the hydrogen refueling efficiency. This design also helps to balance pressure fluctuations within the system, reduce the impact of pulsed gas, and enhance the stability of the entire hydrogen supply system. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0030] Figure 1 This is a schematic diagram of the hydrogen supply system of the hydrogen refueling station provided in this application.

[0031] Figure label:

[0032] 100-Hydrogen dispenser; 110-Hydrogen dispensing pipeline; 120-Flow meter; 130-Safety valve; 140-Hydrogen dispensing nozzle; 150-Pressure detection device; 160-Pneumatic ball valve; 170-Second disconnect valve;

[0033] 200-Hydrogen supply module; 210-Hydrogen storage device; 211-Hydrogen tubing bundle vehicle; 212-First break valve; 220-Unloading system; 230-Nitrogen cylinder group;

[0034] 300 - Filling pipeline;

[0035] 400 - Compressor;

[0036] 500 - Regulating circuit; 510 - Flow regulating valve;

[0037] 600-Three-way valve;

[0038] 700-Control System.

[0039] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0040] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0041] With the promotion and application of hydrogen fuel cell vehicles, the demand for hydrogen refueling stations is also increasing. Hydrogen refueling stations include stationary hydrogen refueling stations and mobile hydrogen refueling stations.

[0042] However, existing stationary hydrogen refueling stations, due to their high construction costs and long construction cycles, struggle to adapt quickly to such rapidly changing demands. Furthermore, the lack of flexibility of stationary hydrogen refueling stations limits their rapid deployment capabilities in different regions, which to some extent hinders the widespread adoption and application of hydrogen energy.

[0043] Mobile hydrogen refueling stations are flexible hydrogen refueling facilities that can be deployed to different locations as needed. Compared with traditional fixed hydrogen refueling stations, mobile hydrogen refueling stations have significant flexibility and mobility, and can quickly respond to the hydrogen refueling needs of different regions, especially in areas where hydrogen energy infrastructure is not yet well developed.

[0044] Mobile hydrogen refueling stations can include skid-mounted stations. Specifically, mobile hydrogen refueling stations include hydrogen refueling vehicles and mobile skid-mounted refueling facilities. They can be easily carried and moved by trucks, quickly setting up temporary hydrogen refueling stations to support the temporary energy replenishment needs of large-scale events such as sporting events and concerts. The applications of mobile hydrogen refueling stations are not limited to temporary events; they can also provide temporary hydrogen refueling services in remote areas and be rapidly deployed in emergencies such as natural disasters to provide energy replenishment for emergency vehicles.

[0045] Traditional skid-mounted hydrogen refueling stations are designed with a gas source (such as a hydrogen tank trailer), a compressor, and a hydrogen dispenser. During refueling, hydrogen is drawn from the tank trailer, pressurized by the compressor, and then delivered to the user's vehicle through the dispenser's filling port. During the compressor pressurization process, the hydrogen is converted into a pulsed gas stream.

[0046] Skid-mounted hydrogen refueling stations are often equipped with direct-fill hydrogen refueling machines. These machines use a direct-fill mode, and towards the end of the refueling process, they are often affected by the pulsed gas generated by the compressor. The pressure sensor at the front of the refueling nozzle typically displays both a high-pressure and a low-pressure reading. When this pressure sensor reaches the shutdown pressure, the refueling process ends, but the vehicle is not actually fully refueled, affecting refueling efficiency.

[0047] The reason for this is that when refueling with a direct-fill hydrogen refueling machine, the entire refueling process is uncontrollable and cannot effectively cope with refueling resistance. In addition, the pulse gas has peaks and troughs, and the refueling process is easily terminated due to the peak pressure of the pulse gas triggering the shutdown pressure limit. As a result, after refueling, the SOC value of the on-board hydrogen storage tank is low (i.e., the storage state of hydrogen in the on-board hydrogen storage tank), so the vehicle being refueled is not fully filled when the hydrogen refueling process ends.

[0048] In view of this, this application provides a hydrogen supply system for a hydrogen refueling station. By setting up a regulating loop, a portion of the pressurized hydrogen can be guided back to the compressor inlet, forming a controlled internal loop. This loop helps balance pressure fluctuations within the system, reduces the impact of pulsed gas, and thus improves hydrogen refueling efficiency and system stability. In actual operation, hydrogen flows out from the hydrogen supply module, passes through the refueling pipeline, and enters the compressor for pressurization. A portion of the pressurized hydrogen is directly supplied to the hydrogen dispenser for refueling, while the other portion returns to the compressor inlet through the regulating loop, forming an internal loop. By adjusting the gas flow rate in the regulating loop, the amount of hydrogen entering the loop pipeline can be controlled, thereby regulating the hydrogen pressure and flow rate supplied to the hydrogen dispenser.

[0049] Thus, the hydrogen supply system of the hydrogen refueling station provided in this application embodiment can more stably control the hydrogen pressure and flow rate supplied to the hydrogen refueling machine through the coordinated action of the regulating circuit and the compressor, thereby improving the hydrogen refueling efficiency. This design also helps to balance pressure fluctuations within the system, reduce the impact of pulsed gas, and enhance the stability of the entire hydrogen supply system.

[0050] The following is combined with Figure 1 This application describes a hydrogen supply system for a hydrogen refueling station according to an embodiment of the present application. The hydrogen refueling station in this embodiment can be a skid-mounted hydrogen refueling station.

[0051] Combination Figure 1 The hydrogen supply system of the hydrogen refueling station in this embodiment includes a hydrogen dispenser 100, a gas supply module, a refueling pipeline 300, a compressor 400, and a regulating circuit 500.

[0052] The hydrogen refueling machine 100 is used to refuel the user's vehicle with hydrogen, and the hydrogen supply module 200 is used to supply hydrogen to the hydrogen refueling machine 100. The hydrogen supply module 200 is the source of hydrogen and may include storage equipment such as a hydrogen tank trailer and a hydrogen storage tank.

[0053] The hydrogen supply module 200 is connected to the hydrogen refueling machine 100 via the refueling pipeline 300, forming a hydrogen transmission channel within the hydrogen supply system. Hydrogen flows through the refueling pipeline 300, is pressurized, and finally reaches the hydrogen refueling machine 100 for refueling. The compressor 400 is located on the refueling pipeline 300, between the hydrogen supply module 200 and the hydrogen refueling machine 100. The compressor 400 is used to pressurize the hydrogen to a pressure level suitable for refueling into the vehicle.

[0054] The regulating circuit 500 includes an inlet and an outlet, which are respectively connected to the charging line 300 on the outlet side and the inlet side of the compressor 400. Specifically, the inlet of the regulating circuit 500 is connected to the charging line 300 located on the outlet side of the compressor 400, and the outlet of the regulating circuit 500 is connected to the charging line 300 on the inlet side of the compressor 400.

[0055] By setting up the regulating loop 500, a portion of the pressurized hydrogen can be guided back to the inlet of the compressor 400, forming a controlled internal loop. This loop helps to balance pressure fluctuations within the system, reduce the impact of pulsed gas, and thus improve hydrogen refueling efficiency and system stability.

[0056] In actual operation, hydrogen flows out from the hydrogen supply module 200, passes through the filling pipeline 300, and enters the compressor 400 for pressurization. Part of the pressurized hydrogen is directly supplied to the hydrogen dispenser 100 for filling, while the other part returns to the inlet of the compressor 400 through the regulating circuit 500, forming an internal loop. By adjusting the gas flow rate in the regulating circuit 500, the amount of hydrogen entering the loop pipeline can be controlled, thereby regulating the hydrogen pressure and flow rate supplied to the hydrogen dispenser 100.

[0057] Thus, the hydrogen supply system of the hydrogen refueling station provided in this application embodiment can more stably control the hydrogen pressure and flow rate supplied to the hydrogen refueling machine 100 through the synergistic effect of the regulating circuit 500 and the compressor 400, thereby improving the hydrogen refueling efficiency. This design also helps to balance the pressure fluctuations within the system, reduce the impact of pulsed gas, and enhance the stability of the entire hydrogen supply system.

[0058] It is understandable that the resistance to hydrogen flow within the 300mm refueling line can be calculated using a formula. For hydrogen, the line resistance can be expressed as:

[0059]

[0060] Where Δpm is the friction resistance of airflow within the filling pipe 300, λ is the friction resistance coefficient, l is the length of the filling pipe 300, d is the diameter of the filling pipe 300, ρ is the air density, and v is the average air velocity within the filling pipe 300. As can be seen from the formula, the greater the velocity v, the greater the resistance Δpm.

[0061] Therefore, at the beginning of refueling, the refueling rate can be controlled at a relatively high value to improve acceleration efficiency. To ensure lower refueling resistance and higher SOC in the final stage of the refueling process, the refueling rate should be controlled at a lower value in the final stage.

[0062] During the hydrogenation process, the filling rate of the filling pipeline 300 should follow the formula VM=b+k(Pm-P), where VM is the filling rate, Pm is the target pressure, P is the pressure value of the pressure sensor PIT2007, and k and b are coefficients, k>0 and b>0.

[0063] When the pressure at the end of the refueling line 300 (i.e., the pressure of the hydrogen supply module) is much lower than the target pressure (i.e., the hydrogen storage pressure of the target vehicle), the refueling rate should be controlled at a larger value. When the pressure at the end of the hydrogen refueling line 300 is closer to the target pressure, the refueling rate should be controlled at a smaller value.

[0064] By setting up a regulating loop 500, a portion of the pressurized hydrogen is guided back to the inlet of the compressor 400, forming a controlled annular internal circulation. This ensures that the flow rate of the flow meter in the filling pipeline 300 follows the VM = b + k(Pm - P) curve, guaranteeing filling efficiency.

[0065] In some embodiments, combined with Figure 1 The hydrogen supply system of the hydrogen refueling station also includes a three-way valve 600, which is installed on the refueling pipeline 300 on the outlet side of the compressor 400. The three-way valve 600 is connected to the outlet of the compressor 400, the hydrogen dispenser 100 and the inlet of the regulating circuit 500 respectively.

[0066] Understandably, the three-way valve 600 is a valve with three ports, allowing fluid to switch or flow simultaneously between any two different outlets. In the hydrogen supply system of this hydrogen refueling station, the three-way valve 600 can be used to control the flow direction and velocity of hydrogen after the outlet of the compressor 400, that is, to regulate the flow rate of hydrogen entering the hydrogen dispenser 100 or the regulating circuit 500, thereby achieving flow regulation within the hydrogen supply system.

[0067] Specifically, the three-way valve 600 is installed on the filling pipeline 300 on the outlet side of the compressor 400 to ensure that the hydrogen gas pressurized from the compressor 400 can pass through the three-way valve 600 and adjust the flow rate of hydrogen gas to the hydrogen dispenser 100 or the regulating circuit 500 according to the system requirements.

[0068] In actual connection, one port of the three-way valve 600 is connected to the outlet of the compressor 400 to receive pressurized hydrogen; another port is connected to the hydrogen dispenser 100; and yet another port is connected to the inlet of the regulating circuit 500. When the hydrogen supply system needs to regulate the hydrogen flow or pressure, the three-way valve 600 will guide a portion of the hydrogen into the regulating circuit 500 and flow to the inlet of the compressor 400, forming an internal circulation.

[0069] Optionally, in the actual operation of the hydrogen refueling system, under normal operating conditions, the three-way valve 600 will selectively open or close different channels according to the system's control signals or preset conditions. When hydrogen needs to be added to the vehicle, the three-way valve 600 will ensure that the hydrogen mainly flows to the hydrogen dispenser 100, while allowing a small portion of hydrogen to enter the regulating circuit 500 to regulate pressure and flow. When the system detects large fluctuations in hydrogen pressure or flow, the three-way valve 600 can adjust the amount of hydrogen flowing to the regulating circuit 500 to stabilize the system pressure and flow.

[0070] It is evident that the control of the three-way valve 600 ensures more stable pressure and flow rate of hydrogen during the refueling process, thereby improving hydrogen refueling efficiency. The combined use of the three-way valve 600 and the regulating circuit 500 can more effectively balance pressure fluctuations within the hydrogen refueling system, reduce the impact of pulsed gas, and enhance the stability of the entire hydrogen supply system. In addition, the design of the three-way valve 600 makes the hydrogen refueling system more flexible, allowing the flow direction and flow rate of hydrogen to be adjusted according to actual needs, while improving the reliability and safety of the hydrogen refueling system.

[0071] In some embodiments, combined with Figure 1 The regulating circuit 500 is equipped with a flow regulating valve 510, which is used to control the flow rate in the regulating circuit 500.

[0072] Understandably, the flow regulating valve 510 can be used to control the fluid flow rate. In the hydrogen supply system of a hydrogen refueling station, the flow regulating valve 510 is installed on the regulating loop 500 and can be used to regulate the amount of hydrogen flowing from the outlet of the compressor 400 to the regulating loop 500 (and then back to the inlet of the compressor 400).

[0073] Specifically, when the hydrogen supply system needs to adjust the hydrogen flow rate, the position of the valve core can be changed manually or automatically to change the valve opening and thus adjust the flow rate.

[0074] Optionally, the flow control valve 510 can be equipped with a sensor and controller that can monitor the flow in the circuit in real time and automatically adjust the valve opening according to preset parameters or system requirements to achieve precise flow control.

[0075] Thus, by precisely controlling the hydrogen flow rate in the regulating loop 500, the flow regulating valve 510 can effectively balance pressure fluctuations within the hydrogen supply system, reduce the impact of pulsed gas, and thereby improve the stability of the entire hydrogen supply system. Furthermore, during hydrogen refueling, the flow regulating valve 510 can adjust the hydrogen flow rate according to actual needs, ensuring that hydrogen is injected into the vehicle at an optimal speed and pressure, thereby improving refueling efficiency and guaranteeing the adaptability and reliability of the hydrogen supply system.

[0076] Additionally, in some embodiments, combined with Figure 1 The hydrogen supply system can also be equipped with a control system 700, which can be used to control the start-up, stop, and adjustment of parameters such as flow rate and pressure of the hydrogen supply system. For example, the control system 700 can adjust the flow regulating valve 510 in real time according to the flow rate and pressure to achieve accurate control of the flow rate of the hydrogen supply system.

[0077] In some embodiments, combined with Figure 1 The hydrogen supply module 200 includes a hydrogen storage device 210 and a gas unloading system 220. The hydrogen storage device 210 is used to store liquid hydrogen, and the gas unloading system 220 is connected to the hydrogen storage device 210 and the inlet of the compressor 400, respectively.

[0078] Specifically, the hydrogen storage device 210 is a device in the hydrogen supply module 200 used to store liquid hydrogen. It is understood that liquid hydrogen, due to its high energy density and low-temperature storage characteristics, has become a common form of hydrogen storage in hydrogen refueling stations for hydrogen-powered vehicles. Optionally, the hydrogen storage device 210 can be a vacuum-insulated container, a multi-layered insulated container, etc. For example, the hydrogen storage device 210 can be a hydrogen tubing vehicle 211, achieving both hydrogen storage and mobility.

[0079] The unloading system 220 is used to safely and efficiently transfer liquid hydrogen from the hydrogen storage device 210 to the compressor 400. It is understood that since liquid hydrogen will rapidly evaporate and turn into gaseous hydrogen at room temperature, the unloading system 220 has the functions of preventing liquid hydrogen leakage, controlling the evaporation rate, monitoring system pressure and temperature, and also has an emergency shutdown function to quickly cut off the hydrogen supply when an abnormal situation is detected. The setting of the unloading system 220 ensures the stable supply of hydrogen and the safety of the hydrogen supply system.

[0080] In the hydrogen supply system of a hydrogen refueling station, the hydrogen storage device 210 and the unloading system 220 are integrated and work together to support the hydrogen refueling operation. Specifically, liquid hydrogen is transported from the hydrogen storage device 210 to the compressor 400 through the unloading system 220, and after being pressurized, it is supplied to the hydrogen refueling machine 100 for refueling.

[0081] In some embodiments, combined with Figure 1 A first break valve 212 is provided between the hydrogen storage device 210 and the unloading system 220. The function of the first break valve 212 is as an emergency shut-off device.

[0082] In actual operation at a hydrogen refueling station, if an unexpected situation occurs, such as vehicle movement causing hose strain or abnormal increase in system pressure, the first disconnect valve 212 can automatically disconnect under external force, thereby quickly cutting off the hydrogen supply and helping to prevent safety accidents such as hydrogen leakage, fire, and explosion.

[0083] The automatic shut-off function of the first disconnect valve 212 helps maintain the stability and reliability of the hydrogen supply system at the hydrogen refueling station. In emergencies, it can quickly isolate the faulty part, prevent the fault from spreading, and thus ensure the normal operation of the entire system.

[0084] In some embodiments, combined with Figure 1 The hydrogen storage device 210 includes a hydrogen tubing vehicle 211. It is understood that the hydrogen tubing vehicle 211 is a vehicle used for storing and transporting high-pressure gaseous or liquid hydrogen. The hydrogen tubing vehicle 211 may consist of multiple high-pressure hydrogen storage tanks mounted on the vehicle for rapid transport when needed.

[0085] The hydrogen tubular vehicle 211 can be dispatched and transported on demand, providing hydrogen refueling stations with a high degree of flexibility and scalability. In this way, hydrogen refueling stations can adjust their hydrogen storage and supply capacity according to actual needs without the need for large-scale infrastructure construction.

[0086] In some embodiments, combined with Figure 1 The hydrogen supply module 200 also includes a nitrogen cylinder group 230, and the unloading system 220 is connected to the nitrogen cylinder group 230. It can be understood that the nitrogen cylinder group 230 is used to store high-pressure nitrogen. In the hydrogen supply system of the hydrogen refueling station, the nitrogen cylinder group 230 can serve as an auxiliary gas source to achieve purging, replacement, protection, etc.

[0087] Specifically, when hydrogen pipelines or equipment require maintenance, repair, or replacement, nitrogen cylinder group 230 can provide high-pressure nitrogen to purge the pipelines, removing residual hydrogen and ensuring operational safety. Furthermore, before starting the hydrogen system, nitrogen can also be used to replace air in the system to prevent the formation of explosive mixtures.

[0088] In addition, nitrogen can be used as a protective gas in some situations. For example, in hydrogen leak detection tests, nitrogen can be injected into the system to simulate a leak and help test the system's sealing performance. Furthermore, in emergency situations such as hydrogen leaks, nitrogen cylinder group 230 can also be used as an emergency response measure, injecting nitrogen to dilute the concentration of leaked hydrogen and reduce the risk of explosion.

[0089] The unloading system 220 is connected to the nitrogen cylinder group 230, allowing nitrogen to easily enter the hydrogen pipeline or equipment when purging, replacement, or protection operations are required. In this way, the nitrogen cylinder group 230, the unloading system 220, the hydrogen storage device 210, and other components work together to ensure the safe and efficient operation of the hydrogen supply system at the hydrogen refueling station.

[0090] In some embodiments, combined with Figure 1 The hydrogen dispenser 100 includes a hydrogen dispensing pipeline 110, a flow meter 120, a safety valve 130, and a hydrogen dispensing nozzle 140. The hydrogen dispensing pipeline 110 is the main channel for transporting hydrogen from the hydrogen storage device 210 to the equipment to be refilled.

[0091] The flow meter 120 is installed on the hydrogen refueling line 110 to accurately measure and monitor the flow rate of hydrogen, so that the operator can understand the hydrogen delivery status in real time and ensure that the amount of hydrogen added meets the equipment requirements.

[0092] Safety valve 130 is installed in hydrogen refueling pipeline 110 and located downstream of flow meter 120. When the pressure in the pipeline exceeds the set value, safety valve 130 will automatically open to release excess pressure and prevent safety accidents such as pipeline rupture or hydrogen leakage.

[0093] The hydrogen refueling nozzle 140 is connected to the end of the hydrogen refueling pipeline 110. The hydrogen refueling nozzle 140 is used to inject hydrogen into the equipment to be refueled. The hydrogen refueling nozzle 140 is the direct interface for hydrogen to enter the equipment to be refueled. In actual hydrogen refueling, the operator connects the hydrogen refueling nozzle 140 to the equipment to be refueled and opens the valve on the hydrogen refueling nozzle 140 to allow hydrogen to enter the equipment to be refueled.

[0094] In addition, the hydrogen dispenser 100 can also be connected to the control system 700, and work with the compressor 400, flow regulating valve 510, etc. to ensure the balance of flow in the hydrogen supply system, ensure the safety and stability of the hydrogen supply system, and ensure hydrogen refueling efficiency.

[0095] Optionally, the gas state in the hydrogenation pipeline is the same as that in the filling pipeline. In some embodiments, the filling rate of the hydrogenation pipeline follows VM=Kp×e(t)+Ki×∫e(t)dt+Kd×de(t) / dt, and the pressure P in the hydrogenation pipeline 110 and the opening t of the flow regulating valve 510 satisfy:

[0096]

[0097] Where Kp is the proportional coefficient, Ki is the integral coefficient, Kd is the differential coefficient, k>0, b>0.

[0098] When the injection pressure is P, the opening of the flow regulating valve 510 is controlled to satisfy the above formula of pressure P and opening t of flow regulating valve 510, so as to achieve effective control of the entire injection process and keep the injection resistance at a low level at the end of the injection process, thereby making the final SOC higher and ensuring injection efficiency.

[0099] In some embodiments, combined with Figure 1 A second disconnect valve 170 is also installed on the hydrogen refueling line 110, and the second disconnect valve 170 is located at the gas inlet end of the hydrogen refueling gun 140. The second disconnect valve 170 can quickly cut off the hydrogen supply in the hydrogen refueling line 110 in an emergency to prevent safety accidents such as fire and explosion that may be caused by hydrogen leakage.

[0100] When the hydrogen refueling nozzle 140 is accidentally separated from the vehicle's hydrogen refueling port or subjected to excessive pulling force, the second disconnect valve 170 can automatically disconnect, protecting the hydrogen refueling nozzle 140 and the hydrogen refueling line 110 from damage. The second disconnect valve 170 helps maintain the stability of the hydrogen refueling system, ensuring the continuity and reliability of hydrogen supply. In an emergency, it can quickly isolate the faulty part, preventing the fault from spreading, thereby ensuring the normal operation of the entire hydrogen refueling system.

[0101] In some embodiments, combined with Figure 1 The hydrogen refueling machine 100 also includes a pressure detection device 150, which is located in the hydrogen refueling pipeline 110 and is used to detect the pressure in the hydrogen refueling pipeline 110.

[0102] Understandably, the pressure detection device 150 can promptly detect abnormal pressure in the pipeline, such as excessively high or low pressure, thereby triggering the alarm system or automatically shutting down to prevent safety accidents such as hydrogen leakage and pipeline rupture.

[0103] In addition, during the hydrogen refueling process, the pressure detection device 150 can provide pressure information to the operator. Based on this information, the operator can adjust the parameters of the hydrogen dispenser 100, such as flow rate and pressure, to ensure that the amount of hydrogen added meets the equipment requirements and to ensure the stability and efficiency of hydrogen refueling.

[0104] Optionally, the pressure detection device 150 can be installed at key nodes such as the inlet and outlet of the hydrogen refueling pipeline 110 to more comprehensively monitor pressure changes during the hydrogen refueling process and ensure the safe operation of the hydrogen refueling machine 100.

[0105] Optionally, the pressure detection device 150 can be integrated with the control system 700 to achieve automated monitoring and control. When an abnormal pressure is detected, the control system 700 will automatically trigger an alarm or shutdown operation to ensure the safe operation of the hydrogen dispenser 100.

[0106] In some embodiments, combined with Figure 1 The hydrogen refueling machine 100 also includes a pneumatic ball valve 160, which is located at the connection between the hydrogen refueling pipeline 110 and the filling pipeline 300.

[0107] Understandably, the pneumatic ball valve 160 is a device that uses compressed air or inert gas as a power source to open and close the valve by controlling the gas pressure. In the hydrogen dispenser 100, the pneumatic ball valve 160 can be located at the connection between the hydrogen filling line 110 and the filling line 300 to control the flow and cut off of hydrogen.

[0108] The pneumatic ball valve 160 has a fast response speed, enabling it to open and close quickly, thus facilitating emergency shut-off and flow control of the hydrogen supply system. Furthermore, the pneumatic ball valve 160 has excellent sealing performance, preventing hydrogen leakage and ensuring the safety of the hydrogen refueling process. The pneumatic ball valve 160 also features a simple structure, easy maintenance, high reliability and durability, and can meet the long-term, frequent use requirements of the hydrogen refueling machine 100.

[0109] Optionally, the pneumatic ball valve 160 can be integrated with the control system 700 to achieve automated control and remote monitoring, thereby improving the automation level and safety of the hydrogenation process.

[0110] Finally, it should be noted that other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and alterations may be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A hydrogen supply system for a hydrogen refueling station, characterized in that, include: Hydrogenation unit (100); A hydrogen supply module (200) is used to supply hydrogen to the hydrogen dispenser (100); A refueling pipeline (300) is provided, through which the hydrogen supply module (200) is connected to the hydrogen dispenser (100); A compressor (400) is provided on the filling pipeline (300) and located between the hydrogen supply module (200) and the hydrogen dispenser (100); A regulating circuit (500) is provided, the inlet of which is connected to a charging line (300) located on the outlet side of the compressor (400), and the outlet of the regulating circuit (500) is connected to a charging line (300) on the inlet side of the compressor (400).

2. The hydrogen supply system of the hydrogen refueling station according to claim 1, characterized in that, Also includes: A three-way valve (600) is provided on the filling pipeline (300) on the outlet side of the compressor (400). The three-way valve (600) is connected to the outlet of the compressor (400), the hydrogen dispenser (100), and the inlet of the regulating circuit (500).

3. The hydrogen supply system of the hydrogen refueling station according to claim 1, characterized in that, The regulating circuit (500) is provided with a flow regulating valve (510), which is used to control the flow rate in the regulating circuit (500).

4. The hydrogen supply system of the hydrogen refueling station according to claim 1, characterized in that, The hydrogen supply module (200) includes: Hydrogen storage device (210) for storing liquid hydrogen; The gas unloading system (220) is connected to the inlet of the hydrogen storage device (210) and the compressor (400), respectively.

5. The hydrogen supply system of the hydrogen refueling station according to claim 4, characterized in that, The hydrogen storage device (210) includes a hydrogen tubing vehicle (211).

6. The hydrogen supply system of the hydrogen refueling station according to claim 4, characterized in that, The hydrogen supply module (200) further includes a nitrogen cylinder group (230), and the unloading system (220) is also connected to the nitrogen cylinder group (230).

7. The hydrogen supply system of a hydrogen refueling station according to any one of claims 1-6, characterized in that, The hydrogenation machine (100) includes: Hydrogenation pipeline (110); A flow meter (120) is installed in the hydrogen refueling pipeline (110); A safety valve (130) is provided in the hydrogenation pipeline (110) and located downstream of the flow meter (120); A hydrogen refueling gun (140) is connected to the end of the hydrogen refueling line (110) and is used to inject hydrogen into the equipment to be refueled.

8. The hydrogen supply system of the hydrogen refueling station according to claim 7, characterized in that, The hydrogenation machine (100) also includes: A pressure detection device (150) is provided in the hydrogen refueling pipeline (110) and is used to detect the pressure in the hydrogen refueling pipeline (110).

9. The hydrogen supply system of the hydrogen refueling station according to claim 7, characterized in that, The pressure P in the hydrogenation pipeline (110) and the opening degree t of the flow regulating valve (510) satisfy the following: Where Kp is the proportional coefficient, Ki is the integral coefficient, Kd is the differential coefficient, k>0, b>0.

10. The hydrogen supply system of the hydrogen refueling station according to claim 7, characterized in that, The hydrogenation machine (100) also includes: A pneumatic ball valve (160) is located at the connection between the hydrogenation pipeline (110) and the filling pipeline (300).

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