High-pressure hydrogen storage cylinder combination valve for vehicle and fuel supply method of high-pressure hydrogen storage cylinder combination valve
By designing a combined valve for high-pressure hydrogen storage cylinders that integrates solenoid valves, filters, and sensors, the problem of easy leakage of existing valves in high-temperature environments has been solved, achieving improvements in safety and functionality, and providing a reliable hydrogen refueling process and multiple protections.
Patent Information
- Application Number
- CN202511009541.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-22
- Publication Date
- 2025-11-04
AI Technical Summary
Existing high-pressure hydrogen storage cylinder valves for vehicles have simple structures, which are prone to gas expansion in high-temperature environments, leading to the risk of leakage or explosion. In addition, their functions are limited and cannot meet the requirements for high safety.
Design a high-pressure hydrogen storage cylinder combined valve that integrates a solenoid valve, a vent valve, a manual valve, an inlet filter, a check valve, a syringe, an outlet filter, an overflow valve, and a temperature-driven safety pressure relief device. Equipped with pressure and temperature sensors, it enables real-time monitoring and control. Combined with multi-layer sintered filters and sealing design, it improves safety.
By monitoring and controlling in real time, the risk of gas leakage under low temperature and high pressure environments is reduced, the safety of the unit is improved, a reliable and rapid hydrogenation process is achieved, and multiple safety protections are provided in case of failure.
Smart Images
Figure CN120889913A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of high-pressure hydrogen storage technology for vehicles, specifically to a combination valve for a high-pressure hydrogen storage cylinder for vehicles and its fuel supply method. Background Technology
[0002] In new energy vehicles that primarily use hydrogen energy as their power source, a lightweight and compact high-pressure valve is needed to ensure the stable operation of hydrogen storage tanks under various working conditions, connecting the hydrogen storage tanks and pipeline systems for both hydrogen refueling and use. Currently, high-pressure valves for vehicles consist of various safety-related valve types and filtration systems, including: manual shut-off valves, automatic shut-off valves, check valves, temperature-driven safety pressure relief devices, overflow valves, and temperature sensors.
[0003] With the increasing production and sales of fuel cell vehicles and the expansion of demonstration projects, the demand for hydrogen storage cylinders in vehicles has increased significantly, while higher performance requirements have been placed on these cylinders. Existing hydrogen storage cylinder valve structures are relatively simple, only capable of basic shut-off and opening functions, and are prone to leakage or explosion due to gas expansion in high-temperature environments. Summary of the Invention
[0004] The present invention addresses the problems mentioned above by designing a combined valve for a high-pressure hydrogen storage cylinder for vehicles and a fuel supply method thereof, thereby reducing the risk of gas leakage from the valve and improving the safety of the device.
[0005] To achieve the above objectives, the present invention provides a combined valve for a high-pressure hydrogen storage cylinder in a vehicle, comprising a valve body with multiple ports, and a solenoid valve, a vent valve, and a manual valve respectively disposed within the ports. It also includes an inlet filter, a one-way valve, a syringe, an outlet filter, and an overflow valve disposed within the ports. The inlet filter is connected to the manual valve via a first pipe, the manual valve is connected to the solenoid valve via a second pipe, the solenoid valve is equipped with a one-way valve, and the solenoid valve is connected to the syringe via an inlet pipe. The outlet port of the syringe is connected to the high-pressure hydrogen storage cylinder of the vehicle. The outlet filter and the overflow valve are sequentially connected to the solenoid valve via a vent pipe.
[0006] Furthermore, a temperature-driven safety pressure relief device and a TPRD discharge port are respectively installed in the interface of the valve body. The manual valve is connected to the vent valve through the second vent pipe. The vent valve is connected to the temperature-driven safety pressure relief device through the first pressure relief pipe and the second pressure relief pipe in sequence. The temperature-driven safety pressure relief device is connected to the TPRD discharge port through the third pressure relief pipe.
[0007] Furthermore, a pressure sensor is installed inside the interface of the valve body, and the valve body has a pressure detection port, into which the detection end of the pressure sensor extends.
[0008] Furthermore, a temperature sensor is installed inside the interface of the valve body, and the valve body has a temperature detection port, with the detection end of the temperature sensor extending into the temperature detection port.
[0009] Furthermore, the body of the temperature-driven safety pressure relief device has an annular groove, and a sealing ring is installed between the annular groove and the valve body.
[0010] Preferably, the interfaces of the vent valve and the manual valve are arranged adjacent to each other; the axes of the TPRD discharge port and the air inlet filter are arranged parallel; and the air outlet port of the syringe is arranged at an angle.
[0011] Preferably, the air inlet filter is a multi-layer sintered filter.
[0012] This invention also includes a fuel supply method for a combination valve of a high-pressure hydrogen storage cylinder for vehicles, comprising the following steps: 1) During the filling process, the high-pressure hydrogen is purified and filtered by the air inlet filter, and then delivered to the solenoid valve through the normally open manual valve. Finally, the one-way valve is opened, and hydrogen is added to the high-pressure hydrogen storage cylinder of the vehicle through the tilted syringe. 2) In step one, the temperature sensor measures the gas temperature at the temperature detection port in real time. If the gas temperature exceeds the threshold during the filling process, the gas filling of the valve body is shut off. 3) During the fuel removal process, the high-pressure hydrogen gas is purified and filtered by the outlet filter, then flows through the overflow valve, and then flows to the solenoid valve. At this time, the one-way valve integrated by the solenoid valve opens under the action of pressure difference, while the vent valve is in the normally closed state. Finally, the hydrogen gas returns to the inlet filter along the normally open manual valve, completing the fuel discharge process. 4) In step two of the filling process, the temperature range is -40℃ to +85℃.
[0013] In summary, the present invention has the following advantages and beneficial technical effects: 1. In this invention, the valve body integrates pressure and temperature sensors to monitor the filling and discharging process in real time, reducing the risk of gas leakage under low temperature and high pressure environments, improving device safety, and integrating control and safety protection functions. The improved layout within the valve body enables a reliable and rapid hydrogenation process.
[0014] 2. In this invention, the air inlet filter is preferably a multi-layer sintered filter. The multi-layer design makes it easy to replace, and the sintered material has high durability, meeting the requirements for filtration function and service life.
[0015] 3. In this invention, the solenoid valve is the main power supply device for opening and closing the vehicle cylinder valve. When the vehicle is started (or turned off), the solenoid valve opens (closes) under the action of this force. The vent valve is used to release the gas inside the cylinder when the solenoid valve malfunctions or the power is turned off. Hydrogen can be released with the help of tools. The manual valve is used to cut off the inflow and outflow when the solenoid valve malfunctions.
[0016] 4. In this invention, the temperature-driven safety pressure relief device serves as a safety device for releasing compressed hydrogen from the container. The TPRD discharge port is connected to the venting pipe via a pressure relief pipe. When the temperature sensing temperature of the pressure sensor reaches 110℃±5 degrees Celsius and the temperature sensing glass column breaks, the device opens and releases hydrogen to prevent the container from exploding in the event of a fire. Attached Figure Description
[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a cross-sectional view of the present invention. Figure 1 ; Figure 3 This is a cross-sectional view of the present invention. Figure 2 ; Figure 4 This is a partial cross-sectional view of the present invention. Figure 3 ; Figure 5 This is a schematic diagram of the fuel supply process of the present invention.
[0018] The reference numerals in the attached figures are: 1. Valve body; 2. Solenoid valve; 3. Vent valve; 4. Manual valve; 5. Inlet filter; 6. Injector; 7. Outlet filter; 8. Overflow valve; 9. Temperature-driven safety pressure relief device; 10. TPRD discharge port; 11. Pressure sensor; 12. Temperature sensor; 13. Pipe 1; 14. Pipe 2; 15. Intake Pipe 1; 16. Vent Pipe 1; 17. Vent Pipe 2; 18. Pressure Relief Pipe 1; 19. Pressure Relief Pipe 2; 20. Pressure Relief Pipe 3. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout; the described embodiments are some embodiments of this invention, but not all embodiments; the embodiments and directional terms described below with reference to the accompanying drawings are exemplary and intended to explain this invention, and should not be construed as limiting this invention; all other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention. The embodiments of this invention will be described in detail below with reference to the accompanying drawings: The following is in conjunction with the appendix Figures 1-5 The present invention will be further described in detail below: Example 1 like Figures 1-3 As shown, this embodiment discloses a combined valve for a high-pressure hydrogen storage cylinder in a vehicle, including a valve body 1 with multiple ports, and a solenoid valve 2, a vent valve 3 (BV), a manual valve 4 (MV), an inlet filter 5, a one-way valve, a syringe 6, an outlet filter 7, and an overflow valve 8, each respectively disposed within one of the ports of the valve body 1. The valve body 1 serves as the main structure of the entire valve. The front part of the internal thread of the ports is equipped with a waterproof and dustproof sealing element, and the surface of the valve body 1 is subjected to hard anodizing treatment to enhance its resistance to salt spray corrosion. Finally, the sealing area needs to be ground and polished. The inlet filter 5 is preferably a multi-layer sintered filter. The inlet filter 5 is connected to the manual valve 4 through pipe 13. The manual valve 4 is connected to the solenoid valve 2 through pipe 14. The solenoid valve 2 is integrated with a one-way valve, and the solenoid valve 2 is sequentially connected to the one-way valve and the syringe 6 through inlet pipe 15. The outlet port of the syringe 6 is connected to the high-pressure hydrogen storage cylinder of the vehicle. The outlet filter 7 and the overflow valve 8 are sequentially connected to the solenoid valve 2 through vent pipe 16.
[0020] like Figure 2 As shown, a temperature-driven safety pressure relief device 9 (TPRD) and a TPRD discharge port 10 are respectively installed in the interface of the valve body 1. The manual valve 4 is connected to the vent valve 3 through the vent pipe 2 17. The vent valve 3 is connected to the temperature-driven safety pressure relief device 9 through the pressure relief pipe 1 18 and the pressure relief pipe 2 19 in sequence. The temperature-driven safety pressure relief device 9 is connected to the TPRD discharge port 10 through the pressure relief pipe 3 20.
[0021] like Figure 2 as well as Figure 4As shown, a pressure sensor 11 and a temperature sensor 12 are respectively installed in the interface of the valve body 1. The valve body 1 has a temperature detection port and a pressure detection port. The detection end of the pressure sensor 11 extends into the pressure detection port, and the temperature sensor 12 extends into the temperature detection port. The body of the temperature-driven safety pressure relief device 9 has an annular groove. A rubber sealing ring is installed between the annular groove and the inner cavity of the valve body 1 to meet the sealing requirements.
[0022] like Figures 2-3 As shown, the interfaces of the vent valve 3 and the manual valve 4 are arranged adjacent to each other; the axes of the TPRD discharge port 10 and the inlet filter 5 are arranged nearly horizontally to facilitate the arrangement of high-pressure pipelines and components; the outlet port of the syringe 6 is set at an angle.
[0023] Example 2 like Figure 5 As shown, the fuel supply method of the combined valve for a high-pressure hydrogen storage cylinder in a vehicle according to the present invention is as follows: The filling process is as follows: Step 1: High-pressure hydrogen gas is filtered at the micron level through the inlet filter 5, and then passes through the normally open manual valve 4 to reach the solenoid valve 2 with a small pressure loss. Finally, the one-way valve is opened and hydrogen gas is added through the syringe 6 with an inclination angle of 10°. Step 2: In Step 1, temperature sensor 12 measures the gas temperature inside the container. If the temperature exceeds the specified temperature limit (85°C) during the filling process, the filling will be shut off. In the emission process, step three: During fuel removal, high-pressure hydrogen flows through the outlet filter 7 and overflow valve 8, then flows through the same but opposite path as the refueling process, i.e., to solenoid valve 2, and then back to inlet filter 5 via manual valve 4. During this process, the one-way valve integrated in solenoid valve 2 opens under the action of pressure difference, and the vent valve 3 is in the normally closed state. Thus, the high-pressure hydrogen cannot reach the temperature-driven safety pressure relief device 9 and TPRD emission port 10, but can only return to inlet filter 5, thus completing the emission process.
[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A combined valve for a high-pressure hydrogen storage cylinder used in vehicles, comprising a valve body with multiple ports, and a solenoid valve, a venting valve, and a manual valve respectively disposed within the ports, characterized in that: It also includes an inlet filter, a one-way valve, a syringe, an outlet filter, and an overflow valve disposed within the interface; the inlet filter is connected to the manual valve via pipe one, the manual valve is connected to the solenoid valve via pipe two, the solenoid valve is equipped with a one-way valve, and the solenoid valve is connected to the syringe via inlet pipe one, the outlet port of the syringe is connected to the high-pressure hydrogen storage cylinder of the vehicle; the outlet filter and the overflow valve are sequentially connected to the solenoid valve via venting pipe one.
2. The combined valve for a high-pressure hydrogen storage cylinder for vehicles according to claim 1, characterized in that: The valve body is equipped with a temperature-driven safety pressure relief device and a TPRD discharge port. The manual valve is connected to the vent valve through the second vent pipe. The vent valve is connected to the temperature-driven safety pressure relief device through the first and second pressure relief pipes in sequence. The temperature-driven safety pressure relief device is connected to the TPRD discharge port through the third pressure relief pipe.
3. The combined valve for a high-pressure hydrogen storage cylinder for vehicles according to claim 2, characterized in that: A pressure sensor is also installed inside the interface of the valve body, and the valve body has a pressure detection port, into which the detection end of the pressure sensor extends.
4. The combined valve for a high-pressure hydrogen storage cylinder for vehicles according to claim 3, characterized in that: A temperature sensor is also installed inside the interface of the valve body, and the valve body has a temperature detection port, into which the detection end of the temperature sensor extends.
5. A combination valve for a high-pressure hydrogen storage cylinder for vehicles according to claim 2, characterized in that: The body of the temperature-driven safety pressure relief device has an annular groove, and a sealing ring is installed between the annular groove and the valve body.
6. A combination valve for a high-pressure hydrogen storage cylinder for vehicles according to claim 2, characterized in that: The interfaces of the vent valve and the manual valve are arranged adjacent to each other; the axes of the TPRD discharge port and the air inlet filter are arranged parallel; and the air outlet port of the syringe is arranged at an angle.
7. A combination valve for a high-pressure hydrogen storage cylinder for vehicles according to claim 1, characterized in that: The air inlet filter is a multi-layer sintered filter.
8. A fuel supply method for a combination valve of a high-pressure hydrogen storage cylinder for vehicles, characterized in that: The fuel filling steps of the combined valve for high-pressure hydrogen storage cylinders in vehicles as described in claim 4 are as follows: Step 1: During the filling process, the high-pressure hydrogen is purified and filtered by the air inlet filter, and then delivered to the solenoid valve through the normally open manual valve. Finally, the one-way valve is opened, and hydrogen is added to the high-pressure hydrogen storage cylinder of the vehicle through the tilted syringe. Step 2: In Step 1, the temperature sensor measures the gas temperature at the temperature detection port in real time. If the gas temperature exceeds the threshold during the filling process, the filling of the valve body is shut off.
9. A fuel supply method for a combination valve for a high-pressure hydrogen storage cylinder in a vehicle according to claim 8, characterized in that: The fuel discharge steps for the combined valve of the high-pressure hydrogen storage cylinder for vehicles are as follows: During the fuel removal process, high-pressure hydrogen is purified and filtered by the outlet filter, then flows through the overflow valve and then to the solenoid valve. At this time, the one-way valve integrated in the solenoid valve opens under the action of pressure difference, while the vent valve is in the normally closed state. Finally, the hydrogen returns to the inlet filter through the normally open manual valve, completing the fuel discharge process.
10. A fuel supply method for a combination valve for a high-pressure hydrogen storage cylinder in a vehicle according to claim 8, characterized in that: In step two of the filling process, the gas temperature range is -40℃ to +85℃.