Hydrogen supply system, control method thereof and vehicle

Abstract

The invention relates to a hydrogen supply system, a control method thereof and a vehicle. The hydrogen supply system comprises a hydrogen combustion device, a hydrogen storage device and a collection device. Wherein the hydrogen storage device comprises a hydrogen storage bottle and a first valve arranged at a port of the hydrogen storage bottle, the first valve is used for controlling the opening and closing of the port of the hydrogen storage bottle, and the hydrogen storage bottle is communicated with the hydrogen burning device through the first valve. The collecting device is used for collecting leaked hydrogen and comprises a collecting tank and a first pressure sensor arranged on the collecting tank, the collecting tank is communicated with the hydrogen storage bottle through a first valve, and the first pressure sensor is used for detecting the pressure in the collecting tank. When the first valve leaks due to the fact that the first valve is not tightly closed, leaked hydrogen can be introduced into the collecting tank to be stored, the situation that the hydrogen leaks to the outside to cause danger is prevented, and waste of the hydrogen can be prevented. In addition, if the first pressure sensor detects that the pressure in the collecting tank rises, hydrogen in the hydrogen storage bottle leaks, and measures can be taken in time for remediation.

Description

Technical Field

[0001] The present disclosure relates to the technical field of hydrogen supply, and in particular, to a hydrogen supply system and a control method thereof and a vehicle. Background Art

[0002] After long-term use, hydrogen-powered vehicles may experience slight leakage in the bottle mouth valve of the hydrogen storage bottle when parked or driving. Due to the small amount of leakage, the hydrogen concentration sensor is difficult to detect, which will cause safety hazards. Summary of the invention

[0003] The purpose of the present disclosure is to provide a hydrogen supply system and a control method thereof and a vehicle, wherein the hydrogen supply system can detect leakage of a hydrogen storage bottle and then take remedial measures to eliminate the safety hazard caused by slight leakage of the hydrogen storage bottle.

[0004] In order to achieve the above-mentioned object, the present disclosure provides a hydrogen supply system in a first aspect, comprising: Hydrogen combustion device; A hydrogen storage device, comprising a hydrogen storage bottle and a first valve disposed at the opening of the hydrogen storage bottle, wherein the first valve is used to control the opening of the opening of the hydrogen storage bottle, and the hydrogen storage bottle is connected to the hydrogen combustion device through the first valve; and A collecting device is used to collect leaked hydrogen, the collecting device includes a collecting tank and a first pressure sensor arranged on the collecting tank, the collecting tank is connected to the hydrogen storage bottle through the first valve, and the first pressure sensor is used to detect the pressure in the collecting tank.

[0005] Optionally, the hydrogen supply system further comprises a hydrogen supply flow path, and two ends of the hydrogen supply flow path are respectively connected to the hydrogen combustion device and the first valve; The collecting tank comprises an air inlet and an air outlet, the air inlet is connected to the hydrogen storage bottle through the first valve, and the air outlet is connected to the hydrogen supply flow path.

[0006] Optionally, the hydrogen supply system also includes a first ejector, a second ejector and a pressure reducing valve arranged in the hydrogen supply flow path, the first ejector is located between the pressure reducing valve and the first valve, the second ejector is located between the pressure reducing valve and the hydrogen combustion device, and the gas outlet can be connected to the first ejector and the second ejector respectively.

[0007] Optionally, the hydrogen supply system also includes a first three-way valve, which includes a first inlet, a first outlet and a second outlet, the first inlet is connected to the gas outlet, the first outlet is connected to the first ejector through a first flow path, and the second outlet is connected to the second ejector through a second flow path.

[0008] Optionally, a first one-way valve is provided on the first flow path to allow hydrogen to flow from the first three-way valve to the first ejector; and / or, A second one-way valve is provided on the second flow path to allow hydrogen to flow from the first three-way valve to the second ejector.

[0009] Optionally, the hydrogen supply system further comprises an exhaust flow path and a second three-way valve, the first valve being configured as a bottle mouth valve, the bottle mouth valve comprising a first opening, a second opening and an exhaust port, the first opening being connected to an end of the hydrogen supply flow path away from the hydrogen combustion device, the second opening being connected to the hydrogen storage bottle, one end of the exhaust flow path being connected to the exhaust port, and the other end of the exhaust flow path being connected to the outside; The second three-way valve includes a second inlet, a third outlet and a fourth outlet. The second three-way valve is arranged in the exhaust flow path. The exhaust port is connected to the second inlet, the third outlet is connected to the collection tank, and the fourth outlet is used to communicate with the outside.

[0010] Optionally, a fourth one-way valve is provided on the flow path connecting the third outlet and the collecting tank, for allowing the hydrogen gas discharged from the second three-way valve to flow into the collecting tank.

[0011] Optionally, the hydrogen supply flow path is connected to the exhaust flow path through a third flow path, the connection point between the third flow path and the exhaust flow path is located between the second three-way valve and the first valve, and a stop valve for controlling the opening and closing of the third flow path is provided on the third flow path; and / or, The hydrogen storage bottle also includes a hydrogen discharge port, a bottle tail valve is provided at the hydrogen discharge port, and the hydrogen storage bottle is connected to the exhaust flow path through the bottle tail valve.

[0012] A second aspect of the present disclosure provides a control method for a hydrogen supply system. Based on the hydrogen supply system provided in the first aspect of the present disclosure, the method includes: When the pressure value of the first pressure sensor is greater than the set pressure of the pressure reducing valve, the first three-way valve is controlled to operate so that the collecting tank is connected to the first ejector; When the pressure value of the first pressure sensor is less than the set pressure of the pressure reducing valve, the first three-way valve is controlled to operate so that the collection tank is connected to the second ejector.

[0013] A third aspect of the present disclosure provides a vehicle, comprising the hydrogen supply system provided by the first aspect of the present disclosure.

[0014] Through the above technical solution, the collecting tank is connected to the hydrogen storage bottle through the first valve, and the first pressure sensor is arranged in the collecting tank to detect the pressure in the collecting tank. When the first valve of the hydrogen storage bottle leaks, the hydrogen leaked from the hydrogen storage bottle can pass into the collecting tank and accumulate in the collecting tank, thereby causing the pressure in the collecting tank to increase. The first pressure sensor detects the increase in the pressure in the collecting tank, indicating that the hydrogen in the hydrogen storage bottle has leaked, and measures can be taken to remedy the situation to eliminate the safety hazard caused by the leakage of the hydrogen storage bottle. In addition, the collecting tank can collect and store the leaked hydrogen to prevent the waste of hydrogen.

[0015] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 is a schematic structural diagram of a hydrogen supply system provided in an exemplary embodiment of the present disclosure; Figure 2 is a schematic diagram of charging hydrogen into a hydrogen storage bottle provided in an exemplary embodiment of the present disclosure, wherein the arrows point to the flow path of hydrogen; Figure 3 is a schematic diagram of hydrogen leaking through the exhaust port of the bottle valve and being collected in a collection tank provided in an exemplary embodiment of the present disclosure, wherein the arrow points to the flow path of the hydrogen; Figure 4 is a schematic diagram of a hydrogen supply system provided in an exemplary embodiment of the present disclosure supplying hydrogen to a hydrogen combustion device, wherein the hydrogen in the collection tank is introduced into the first ejector through the first flow path; Figure 5 is a schematic diagram of a hydrogen supply system provided in an exemplary embodiment of the present disclosure supplying hydrogen to a hydrogen combustion device, wherein the hydrogen in the collection tank is introduced into the second ejector through the second flow path; Figure 6 is a flow chart of a hydrogen supply system control method provided in an exemplary embodiment of the present disclosure.

[0017] Description of Reference Numerals 1-hydrogen combustion device; 2-hydrogen storage device; 201-hydrogen storage bottle; 202-first valve; 2020-bottle mouth valve; 3-collecting device; 301-collecting tank; 302-first pressure sensor; 4-pressure reducing valve; 5-first three-way valve; 6-first check valve; 7-second check valve; 8-first ejector; 9-second ejector; 10-controller; 11-second three-way valve; 12-bottle tail valve; 13-overflow valve; 14-stop valve; 15-hydrogenation port; 16-filter; 17-third check valve; 18-overflow valve; 19-fourth check valve; 1a-hydrogen supply path; 11a-first hydrogen supply section; 12a-second hydrogen supply section; 1b-first path; 1c-second path; 1d-third path; 2a-emptying path; 3a-overflow path; 4a-hydrogen filling path; A-first inlet; B-first outlet; C-second outlet; D-second inlet; E-third outlet; F-fourth outlet; G-first opening; H-second opening; I-exhaust port. DETAILED DESCRIPTION

[0018] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0019] In the present disclosure, unless otherwise stated, directional words such as "inside" and "outside" refer to the inside and outside of the outline of a component or structure itself. "First" and "second" are used to distinguish one element from another and do not have order or importance.

[0020] A hydrogen-powered vehicle is a vehicle that uses hydrogen as energy. A hydrogen-powered vehicle generally includes a hydrogen supply system, which includes a hydrogen fuel cell and / or a hydrogen internal combustion engine. Before using a hydrogen-powered vehicle, hydrogen is first filled into a hydrogen storage bottle for storage. When the hydrogen-powered vehicle is started, the hydrogen in the hydrogen storage bottle is passed into the fuel cell and / or the hydrogen internal combustion engine through the hydrogen supply flow path. Currently, the hydrogen supply system mainly includes 35MPa and 70MPa hydrogen storage bottles. When used in a fuel cell and / or a hydrogen internal combustion engine, the hydrogen is decompressed to the specified working pressure. A bottle mouth valve is provided on the hydrogen storage bottle. The bottle mouth valve may not be tightly sealed during long-term use, resulting in a slight leakage of the bottle mouth valve. The hydrogen in the hydrogen storage bottle leaks through the bottle mouth valve into the pipeline connected to the bottle mouth valve, and due to the small amount of leakage, the hydrogen sensor is difficult to detect, which is prone to danger.

[0021] Based on the above technical problems, the first aspect of the present disclosure provides a hydrogen supply system to at least solve some of the above problems, such as Figures 1 to 5As shown, the hydrogen supply system includes a hydrogen burning device 1, a hydrogen storage device 2, and a collecting device 3 that can be used to collect leaked hydrogen. The hydrogen storage device 2 includes a hydrogen storage bottle 201 and a first valve 202 provided at the opening of the hydrogen storage bottle 201. The first valve 202 is used to control the opening of the opening of the hydrogen storage bottle 201. The hydrogen storage bottle 201 is connected to the hydrogen burning device 1 through the first valve 202. The collecting device 3 includes a collecting tank 301 and a first pressure sensor 302 provided in the collecting tank 301. The collecting tank 301 is connected to the hydrogen storage bottle 201 through the first valve 202. The first pressure sensor 302 is used to detect the pressure in the collecting tank 301.

[0022] In the above-mentioned embodiment, when the first valve 202 is not tightly closed, the hydrogen gas leaked from the hydrogen storage bottle 201 through the first valve 202 can be passed into the collecting tank 301, so that the hydrogen gas leaked from the hydrogen storage bottle 201 can be stored to prevent the hydrogen gas from leaking to the outside and causing danger, and to prevent the waste of hydrogen gas. In addition, the first pressure sensor 302 can detect the pressure in the collecting tank 301. When the first pressure sensor 302 detects that the pressure in the collecting tank 301 increases, it indicates that the hydrogen gas in the hydrogen storage bottle 201 has leaked, and timely measures can be taken to remedy the situation, so as to eliminate the potential safety hazard caused by the slight leakage of the hydrogen storage bottle 201.

[0023] It should be noted that the first pressure sensor 302 can detect the pressure of the hydrogen stored in the collection tank 301 in real time. When the first pressure sensor 302 detects that the pressure of the hydrogen in the collection tank 301 increases with time, it indicates that the first valve 202 is not tightly sealed, resulting in leakage of hydrogen in the hydrogen storage bottle 201. The first valve 202 can be repaired or replaced in time. In addition, the above-mentioned hydrogen combustion device 1 can be a hydrogen fuel cell or a hydrogen internal combustion engine, which is not limited here.

[0024] In some embodiments, Figure 1 As shown, the hydrogen supply system also includes a hydrogen supply flow path 1a, and the two ends of the hydrogen supply flow path 1a are respectively connected to the hydrogen combustion device 1 and the first valve 202. The collecting tank 301 includes an air inlet and an air outlet, the air inlet is connected to the hydrogen storage bottle 201 through the first valve 202, and the air outlet is connected to the hydrogen supply flow path 1a. Among them, the air inlet of the collecting tank 301 is connected to the hydrogen storage bottle 201 through the first valve 202, and the hydrogen leaked from the hydrogen storage bottle 201 through the first valve 202 can be collected, and the air outlet of the collecting tank 301 is connected to the hydrogen supply flow path 1a, and the hydrogen collected in the collecting tank 301 can be re-introduced into the hydrogen supply flow path 1a, so that the hydrogen collected in the collecting tank 301 can be reused, which can improve the utilization rate of hydrogen and prevent the waste of hydrogen.

[0025] It should be noted that, in a possible implementation, a first switch valve (not shown in the figure) for controlling the on-off of the air inlet of the collection tank 301 may be provided on the air inlet of the collection tank 301, and a second switch valve (not shown in the figure) for controlling the on-off of the air outlet of the collection tank 301 may be provided on the air outlet of the collection tank 301. When it is necessary to fill hydrogen into the collection tank 301, the first switch valve on the air inlet of the collection tank 301 may be in an open state, and the second switch valve on the air outlet of the collection tank 301 may be in a closed state. When it is necessary to store the hydrogen in the collection tank 301 in the collection tank 301, the first switch valve at the air inlet of the collection tank 301 and the second switch valve at the air outlet of the collection tank 301 may both be in a closed state. When it is necessary to pass the hydrogen in the collection tank 301 out of the collection tank 301, the second switch valve at the air outlet of the collection tank 301 may be opened. The first switch valve and the second switch valve may be opened or closed according to actual needs.

[0026] In some embodiments, the hydrogen supply system also includes a first ejector 8, a second ejector 9 and a pressure reducing valve 4 arranged in the hydrogen supply flow path 1a, the first ejector 8 is located between the pressure reducing valve 4 and the first valve 202, the second ejector 9 is located between the pressure reducing valve 4 and the hydrogen combustion device 1, and the gas outlet can be connected to the first ejector 8 and the second ejector 9 respectively.

[0027] In the above-mentioned embodiment, the pressure reducing valve 4 is arranged on the hydrogen supply flow path 1a, and the hydrogen supply flow path 1a can be divided into a first hydrogen supply section 11a and a second hydrogen supply section 12a, wherein the first hydrogen supply section 11a is a flow section between the pressure reducing valve 4 and the first valve 202 on the hydrogen supply flow path 1a, and the second hydrogen supply section 12a is a flow section between the pressure reducing valve 4 and the hydrogen combustion device 1. The pressure of the hydrogen in the first hydrogen supply section 11a is greater than the pressure of the hydrogen in the second hydrogen supply section 12a. Among them, the hydrogen supply flow path 1a can be configured as a hydrogen supply pipeline.

[0028] In addition, the gas outlet of the collection tank 301 can be connected to the first ejector 8 and the second ejector 9 respectively, that is, the gas outlet of the collection tank 301 can be connected to the first ejector 8, and the gas outlet of the collection tank 301 can be connected to the second ejector 9, so that the gas outlet of the collection tank 301 can be selectively connected to the first ejector 8 or the second ejector 9. In other words, the hydrogen in the collection tank 301 can be selectively introduced into the hydrogen supply flow path 1a between the pressure reducing valve 4 and the hydrogen combustion device or the hydrogen supply flow path 1a between the pressure increasing valve and the first valve 202.

[0029] It should be noted that any appropriate form can be adopted so that the gas outlet of the collection tank 301 can be selectively connected to the first ejector 8 or the second ejector 9. For example, the hydrogen supply system may include a first three-way valve 5, and the first three-way valve 5 includes a first inlet A, a first outlet B and a second outlet C, wherein the first inlet A of the first three-way valve 5 is connected to the gas outlet, the first outlet B is connected to the first ejector 8 through the first flow path 1b, and the second outlet C is connected to the second ejector 9 through the second flow path 1c. The first three-way valve 5 can be controlled to operate so that the gas outlet of the first three-way valve 5 can be selectively connected to the first ejector 8 or the second ejector 9, so as to selectively pass the hydrogen in the collection tank 301 into the first hydrogen supply section 11a and the second hydrogen supply section 12a.

[0030] In addition, in an embodiment not shown in the figure, a three-way joint can be provided at the gas outlet of the collection tank 301, and the gas inlet of the three-way joint can be connected to the collection tank 301. The two gas outlets of the collection tank 301 are respectively connected to the first ejector 8 and the second ejector 9 through a pipeline. Switch valves for controlling the on-off of the pipeline can be respectively provided on the pipeline connecting the three-way joint and the first ejector 8 and the pipeline connecting the three-way joint and the second ejector 9. When the hydrogen in the collection tank 301 needs to be introduced into the first ejector 8, the switch valve on the pipeline connecting the three-way joint and the first ejector 8 can be opened and the switch valve on the pipeline connecting the three-way joint and the second ejector 9 can be closed; when the hydrogen in the collection tank 301 needs to be introduced into the second ejector 9, the switch valve on the pipeline connecting the three-way joint and the second ejector 9 can be opened and the switch valve on the pipeline connecting the three-way joint and the first ejector 8 can be closed.

[0031] In some embodiments, Figure 1 As shown, the hydrogen supply system also includes a controller 10. The first pressure sensor 302 and the first three-way valve 5 are both connected to the controller 10 by signal. The first pressure sensor 302 can feed back the pressure value detected in the collection tank 301 to the controller 10, and then the controller 10 controls the first three-way valve 5 to operate according to the pressure value fed back by the first pressure sensor 302, so that the gas outlet of the collection tank 301 is selectively connected to the first ejector 8 or the second ejector 9. That is, the controller 10 can selectively pass the hydrogen in the collection tank 301 into the first ejector 8 or the second ejector 9 according to the different hydrogen pressures in the collection tank 301. The specific control method will be described under the subject of the control method of the hydrogen supply system, and will not be repeated here.

[0032] In some embodiments, a first one-way valve 6 is provided on the first flow path 1 b to allow hydrogen to flow from the first three-way valve 5 to the first ejector 8 and prevent hydrogen from flowing back from the first ejector 8 to the first three-way valve 5 .

[0033] In addition, a second one-way valve 7 may be provided on the second flow path 1 c to allow hydrogen to flow from the first three-way valve 5 to the second ejector 9 and prevent hydrogen from flowing back from the second ejector 9 to the first three-way valve 5 .

[0034] In some embodiments, Figures 1 to 5 As shown, the hydrogen supply system also includes an exhaust flow path 2a and a second three-way valve 11, the first valve 202 is constructed as a bottle mouth valve 2020, the bottle mouth valve 2020 includes a first opening G, a second opening H and an exhaust port I, the end of the hydrogen supply flow path 1a away from the hydrogen combustion device 1 is connected to the first opening G, the second opening H is connected to the hydrogen storage bottle 201, one end of the exhaust flow path 2a is connected to the exhaust port I, and the other end of the exhaust flow path 2a is connected to the outside.

[0035] The second three-way valve 11 includes a second inlet D, a third outlet E and a fourth outlet F. The second three-way valve 11 is arranged in the exhaust flow path 2a. The exhaust port I is connected to the second inlet D, the third outlet E is connected to the collection tank 301, and the fourth outlet F is used to communicate with the outside.

[0036] In some embodiments, the second three-way valve 11 can be controlled to operate so that the second inlet D of the second three-way valve 11 is selectively connected to the third outlet E or the fourth outlet F of the second three-way valve 11, so that the hydrogen discharged from the exhaust port I of the bottle mouth valve 2020 can be selectively passed into the collection tank 301 or discharged to the outside through the exhaust port of the exhaust pipeline.

[0037] In some embodiments, a fourth one-way valve 19 may be provided on the flow path connecting the third outlet E of the second three-way valve 11 and the collecting tank 301, so as to allow the hydrogen discharged from the second three-way valve 11 to flow into the collecting tank 301 and prevent the hydrogen in the collecting tank 301 from flowing back to the second three-way valve 11.

[0038] It should be noted that, in some embodiments, the fourth one-way valve 19 and the first three-way valve 5 can cooperate to allow hydrogen to be buffered in the collection tank 301. For example, when hydrogen is passed into the collection tank 301 through the air inlet of the collection tank 301, the first three-way valve 5 can be in a closed state, and the fourth one-way valve 19 can prevent hydrogen from passing out of the air inlet, so that the hydrogen in the collection tank 301 is temporarily stored in the collection tank 301.

[0039] It should be noted that the bottle mouth valve 2020 is an existing bottle mouth valve 2020, including a thermal dissolving plug (TPRD), a solenoid valve (CSV), a manual stop valve 14 (HV), and a temperature sensor (PT). The thermal dissolving plug is used to automatically release the hydrogen in the gas storage bottle to prevent the hydrogen in the hydrogen storage bottle 201 from overheating and overpressure and causing deflagration and explosion accidents. Specifically, when the temperature of the hydrogen in the hydrogen storage bottle 201 reaches the excitation temperature, the thermal dissolving plug begins to melt, and the pressure relief channel opens, so that the hydrogen in the hydrogen storage bottle 201 can be released through the exhaust port I of the pressure relief channel.

[0040] The solenoid valve acts as a switch to control the on-off of the gas supply pipeline in the bottle mouth valve 2020 , that is, the solenoid valve can control the on-off of the first opening G and the second opening H of the bottle mouth valve 2020 .

[0041] The temperature sensor can detect the temperature of the gas in the hydrogen storage bottle 201.

[0042] The temperature sensor of the bottle mouth valve 2020 can be connected to the controller 10 by signal, and the temperature of the hydrogen in the hydrogen storage bottle 201 detected by the temperature sensor can be fed back to the controller 10. In addition, the solenoid valve of the bottle mouth valve 2020 can also be connected to the controller 10 by signal, and the controller 10 controls the on-off of the solenoid valve to control the cut-off or conduction between the first opening G and the second opening H of the bottle mouth valve 2020.

[0043] In some embodiments, the hydrogen supply system further includes a hydrogen filling flow path 4a, which is connected to the hydrogen supply flow path 1a, and the connection between the hydrogen filling flow path 4a and the hydrogen supply flow path 1a is located between the pressure reducing valve 4 and the bottle mouth valve 2020. A hydrogen filling port is provided at one end of the hydrogen filling flow path 4a away from the hydrogen supply flow path 1a, and a filter 16 and a third one-way valve 17 are sequentially provided on the hydrogen filling flow path 4a along the hydrogen filling direction. Among them, the filter 16 can filter impurities during hydrogen filling, and the third one-way valve 17 can prevent the hydrogen filled into the hydrogen storage bottle 201 from flowing back. The pressure reducing valve 4 on the hydrogen supply flow path 1a is connected to the controller 10 signal. When hydrogen is filled into the hydrogen storage bottle 201, the controller 10 controls the pressure reducing valve 4 to close so that the hydrogen does not pass through the pressure reducing valve 4, that is, the hydrogen introduced through the hydrogen filling port can be smoothly filled into the hydrogen storage bottle 201.

[0044] When hydrogen is supplied to the hydrogen combustion device 1 through the hydrogen storage bottle 201 , the third one-way valve 17 can prevent hydrogen from flowing toward the hydrogen filling port.

[0045] In addition, an overflow valve 18 can be provided on the hydrogen supply path 1a, and the overflow valve 18 is connected to the first opening G of the bottle mouth valve 2020. The overflow valve 18 can protect the hydrogen filling path 4a and the hydrogen supply path 1a when hydrogen is filled into the hydrogen storage bottle 201.

[0046] like Figure 1As shown, there are two hydrogen storage bottles 201, and the two hydrogen storage bottles 201 are respectively connected to a bottle mouth valve 2020. Each bottle mouth valve 2020 is connected to a flow valve 18.

[0047] The process of filling hydrogen into the hydrogen storage bottle 201 is briefly described below. When the hydrogen supply system is in the hydrogen supply mode, hydrogen can be filled into the hydrogen storage bottle 201 through the hydrogen filling port. Figure 2 As shown, there are two hydrogen storage bottles 201. When hydrogen needs to be filled into the hydrogen storage bottle 201, the controller 10 controls the pressure reducing valve 4 on the hydrogen supply path 1a to be closed, and the hydrogen is filled into the hydrogen filling path 4a through the hydrogen filling port 15. The hydrogen passes through the filter 16 and the third one-way valve 17 in turn, and then is divided into two branches. The hydrogen in each branch passes through the overflow valve 18 and the bottle mouth valve 2020 and is filled into the hydrogen storage bottle 201.

[0048] During the hydrogenation process, if the temperature in the hydrogen storage bottle 201 is high, the hot melt plug of the bottle mouth valve 2020 will melt, the exhaust port I of the bottle mouth valve 2020 will open, and the hydrogen in the hydrogen storage bottle 201 will leak into the exhaust pipe. At this time, the controller 10 can control the second three-way valve 11 to operate so that the second inlet D and the fourth outlet F of the second three-way valve 11 are connected, and the hydrogen in the hydrogen storage bottle 201 can be discharged to the outside.

[0049] In some embodiments, the hydrogen supply flow path 1a is connected to the exhaust flow path 2a through the third flow path 1d, and the connection point between the third flow path 1d and the exhaust flow path 2a is located between the second three-way valve 11 and the first valve 202, so that the hydrogen gas introduced into the exhaust flow path 2a from the hydrogen supply flow path 1a can be selectively introduced into the collection tank 301 or discharged to the outside through the second three-way valve 11. A stop valve 14 for controlling the on-off of the third flow path 1d is provided on the third flow path 1d, and is used to control the on-off of the third flow path 1d. When the hydrogen in the hydrogen storage bottle 201 is normally introduced into the hydrogen combustion device through the hydrogen supply flow path 1a, the stop valve 14 can be closed, and when the hydrogen in the hydrogen supply flow path 1a needs to be introduced into the exhaust flow path 2a, the stop valve 14 can be opened.

[0050] It should be understood that the connection between the third flow path 1d and the hydrogen supply flow path 1a can be arbitrarily set. For example, the connection between the second flow path 1c and the hydrogen supply flow path 1a can be located between the pressure reducing valve 4 and the hydrogen using device, that is, the connection between the third flow path 1d and the hydrogen supply flow path 1a can be located at the second hydrogen supply section 12a of the hydrogen supply flow path 1a, which can not only allow the hydrogen in the second hydrogen supply section 12a to pass into the emptying flow path 2a through the third flow path 1d, but also allow the hydrogen in the first hydrogen supply section 11a of the hydrogen supply flow path 1a to pass into the emptying flow path 2a through the third flow path 1d after passing through the pressure reducing valve 4.

[0051] In addition, the hydrogen supply system also includes an overflow flow path 3a, and the two ends of the overflow flow path 3a are connected to the hydrogen supply flow path 1a and the exhaust pipeline respectively. The overflow flow path 3a is provided with an overflow valve 13, and the overflow valve 13 can be used as a safety valve. When the gas pressure of the hydrogen in the hydrogen supply flow path 1a is too high, the hydrogen can be passed into the exhaust pipe through the overflow valve 13 to ensure the safety of the hydrogen supply flow path 1a. Among them, the connection between the overflow flow path 3a and the exhaust flow path 2a can be located between the second three-way valve 11 and the first valve 202, and the connection between the overflow flow path 3a and the hydrogen supply flow path 1a can be located between the pressure reducing valve 4 and the hydrogen combustion device 1, that is, the connection between the overflow flow path 3a and the hydrogen supply flow path 1a can be located in the second hydrogen supply section 12a, which will not be repeated here.

[0052] In some embodiments, when hydrogen is not needed to be supplied through the hydrogen supply path 1a and no hydrogen is stored in the hydrogen storage bottle 201, the stop valve 14 on the third path 1d can be opened, and the second inlet D of the second three-way valve 11 is connected to the third outlet E of the second three-way valve 11. When the bottle mouth valve 2020 leaks and causes the hydrogen in the hydrogen storage bottle 201 to leak into the hydrogen supply path 1a, the hydrogen in the hydrogen supply path 1a can pass through the third path 1d into the exhaust path 2a, and then pass through the second three-way valve 11 into the collection tank 301 for storage. When the first pressure sensor 302 detects that the pressure of the hydrogen in the collection tank 301 has risen, it indicates that the bottle mouth valve 2020 has leaked.

[0053] In addition, when the hydrogen storage bottle 201 supplies hydrogen to the hydrogen combustion device 1 through the hydrogen supply path 1a, the stop valve 14 on the third path 1d is in a closed state, and the second inlet D of the second three-way valve 11 and the third outlet E of the second three-way valve 11 are in a conducting state. When the first pressure sensor 302 detects that the pressure of the hydrogen in the collection tank 301 has risen, it indicates that one or both of the stop valve 14 on the third path 1d and the bottle mouth valve 2020 have leaked, and the hydrogen supply system can be inspected and repaired in time.

[0054] In some embodiments, Figures 1 to 5 As shown, the hydrogen storage bottle 201 also includes a hydrogen discharge port, and a bottle tail valve 12 is provided at the hydrogen discharge port. The hydrogen storage bottle 201 is connected to the emptying flow path 2a through the bottle tail valve 12. The bottle tail valve 12 can be used as a safety valve here. For example, the bottle tail valve 12 may include a hot melt plug. When the temperature of the hydrogen in the hydrogen storage bottle 201 is too high, the hot melt plug of the bottle tail valve 12 will melt, and the pressure relief channel of the bottle tail valve 12 will open, and then the hydrogen in the hydrogen storage bottle 201 will be passed into the emptying flow path 2a, and then the second three-way valve 11 can be controlled to operate, so that the hydrogen in the emptying pipeline can be selectively passed into the collection tank 301 or passed out to the outside.

[0055] In other possible embodiments, the first valve 202 is configured as a bottle mouth valve 2020, and the bottle tail valve 12 can be configured as a switch valve connected to the controller 10 signal. When the temperature sensor of the bottle mouth valve 2020 detects that the temperature of the hydrogen in the hydrogen storage bottle 201 exceeds a preset value, the controller 10 can control the bottle tail valve 12 configured as a switch valve to open, so as to discharge the hydrogen in the hydrogen storage bottle 201 through the hydrogen discharge port.

[0056] In addition, the hydrogen discharge port of the hydrogen storage bottle 201 is provided with a bottle tail valve 12. When the temperature in the hydrogen storage bottle 201 is high, the hot melt plug of the bottle mouth valve 2020 melts, and the hydrogen in the hydrogen storage bottle 201 is discharged into the emptying flow path 2a through the exhaust port 1 of the bottle mouth valve 2020. In addition, when the temperature in the hydrogen storage bottle 201 is high, the hot melt plug of the bottle tail valve 12 will also melt, and the hydrogen in the hydrogen storage bottle 201 can be discharged into the emptying flow path 2a through the bottle tail valve 12. The hydrogen in the hydrogen storage bottle 201 is discharged together by the bottle mouth valve 220 and the bottle tail valve 12, which can speed up the discharge efficiency of the hydrogen in the hydrogen storage bottle 201 and make the hydrogen be discharged faster.

[0057] It should be noted that when the hydrogen storage bottle 201 includes a hydrogen discharge port and a bottle tail valve 12 is provided on the hydrogen discharge port, leak detection is performed through the first pressure sensor 302 and the collecting tank 301. If the first pressure sensor 302 detects that the pressure value of the hydrogen in the collecting tank 301 increases, it is also possible that there is a leak in the bottle tail valve 12. During maintenance, the bottle tail valve 12 also needs to be repaired.

[0058] In addition, when leak detection of hydrogen in the hydrogen supply system is performed through the collecting tank 301 and the first pressure sensor 302, when a leak is detected in the hydrogen supply system, each valve in the hydrogen supply system may also be repaired. For example, when hydrogen is provided to the hydrogen combustion device 1 through the hydrogen storage bottle 201, the pressure increase in the collecting tank 301 is detected by the first pressure sensor 302, indicating that a leak has occurred in the hydrogen supply system, and the bottle mouth valve 2020, the bottle tail valve 12, the overflow valve 13, and the stop valve 14 on the third flow path 1d may be repaired, which will not be described in detail here.

[0059] A second aspect of the present disclosure provides a control method for a hydrogen supply system. Based on the hydrogen supply system provided in the first aspect of the present disclosure, the method includes: Detecting the pressure in the collection tank by a first pressure sensor; Whether the hydrogen in the hydrogen storage bottle 201 is leaking is determined based on the pressure.

[0060] In the above method, the first pressure sensor 302 detects the pressure in the collection tank 301, and then the first pressure sensor 302 feeds back the detected pressure in the collection tank 301 to the controller 10, and the controller 10 determines whether the hydrogen in the hydrogen storage bottle 201 is leaking according to the pressure value fed back by the first pressure sensor 302. For example, when the first pressure sensor 302 detects that the pressure value in the collection tank 301 is rising, it means that the hydrogen in the hydrogen storage bottle 201 is leaking. The hydrogen leak detection method is used to detect whether the hydrogen is leaking. On the one hand, the collection tank 301 can collect the hydrogen leaked from the hydrogen storage bottle 201 through the first valve 202 to prevent the waste of hydrogen; on the other hand, it is determined whether the hydrogen is leaking according to the pressure change of the hydrogen in the collection tank 301. When the hydrogen is found to be leaking, measures can be taken in time. For example, the first valve 202 is inspected and replaced to prevent danger.

[0061] like Figure 3 As shown, the first valve 202 is constructed as a bottle mouth valve 2020. The hot melt plug of the bottle mouth valve 2020 leaks, and the leaked hydrogen enters the collection tank 301 through the second inlet D and the third outlet E of the second three-way valve 11 for buffering.

[0062] In some embodiments, based on Figure 1 As shown in the hydrogen supply system diagram, when the first pressure sensor 302 detects an increase in the pressure value in the collection tank 301, it indicates that a leak has occurred in the hydrogen supply system. The bottle mouth valve 2020, the bottle tail valve 12, the overflow valve 13 and the stop valve 14 on the third flow path 1d may be inspected and repaired, which will not be repeated here.

[0063] It should be noted that, under normal conditions, that is, when the hydrogen supply system is working normally, the second inlet D of the second three-way valve 11 and the third outlet E of the second three-way valve 11 can be in a conducting state, so that the hydrogen discharged into the exhaust flow path 2a can pass into the collection tank 301.

[0064] In some embodiments, Figure 6 As shown, the control method of the hydrogen supply system also includes: S100, when the pressure value of the first pressure sensor is greater than the set pressure of the pressure reducing valve, the first three-way valve is controlled to operate so that the collecting tank is connected to the first ejector.

[0065] S200, when the pressure value of the first pressure sensor is less than the set pressure of the pressure reducing valve, the first three-way valve is controlled to operate so that the collecting tank is connected to the second ejector.

[0066] It should be understood that the method can be performed when the hydrogen supply system is in the hydrogen supply mode, that is, when the hydrogen storage bottle 201 provides hydrogen to the hydrogen combustion device 1. In the above method, the set pressure of the pressure reducing valve 4 is the outlet pressure of the pressure reducing valve 4, such as Figure 4 As shown, the first pressure sensor 302 detects the pressure of the collecting tank 301. When the first pressure sensor 302 detects that the pressure value of the hydrogen in the collecting tank 301 is greater than the set pressure of the pressure reducing valve 4, the controller 10 controls the first three-way valve 5 to operate, so that the first inlet A of the first three-way valve 5 is connected to the first outlet B of the first three-way valve 5, and then the gas outlet of the collecting tank 301 is connected to the first ejector 8 located in the first hydrogen storage section, so that the hydrogen in the collecting tank 301 enters the first hydrogen supply section 11a after passing through the first three-way valve 5 and the first ejector 8, and then enters the second hydrogen supply section 12a after passing through the pressure reducing valve 4, and then enters into the hydrogen combustion device 1, which can avoid the hydrogen pressure in the collecting tank 301 being directly passed into the hydrogen combustion device 1 without being reduced by the pressure reducing valve 4 when it is relatively high, so as to prevent damage to the hydrogen combustion device 1.

[0067] When the controller 10 detects that the pressure value of the hydrogen in the collecting tank 301 is less than the set pressure of the pressure reducing valve 4, the controller 10 controls the first three-way valve 5 to operate, so that the first inlet A of the first three-way valve 5 is connected to the second outlet C of the first three-way valve 5, and then the gas outlet of the collecting tank 301 is connected to the second ejector 9 located in the second hydrogen storage section, so that the hydrogen in the collecting tank 301 enters the second hydrogen supply section 12a after passing through the first three-way valve 5 and the second ejector 9, and then the hydrogen directly enters the hydrogen combustion device 1.

[0068] When the pressure of the hydrogen in the collecting tank 301 is different, the hydrogen in the collecting tank 301 can be selectively introduced into the first hydrogen supply section 11a or the second hydrogen supply section 12a, so that the pressure of the hydrogen introduced into the hydrogen supply path 1a matches the pressure of the hydrogen in the hydrogen supply section into which the hydrogen is introduced, and can then be smoothly introduced into the hydrogen combustion device 1.

[0069] It should be noted that, under normal conditions, the pressure of the hydrogen in the collection tank 301 should be less than or equal to the pressure of the hydrogen in the hydrogen storage bottle 201 .

[0070] A third aspect of the present disclosure provides a vehicle, comprising the hydrogen supply system provided in the first aspect of the present disclosure, and the vehicle has all the beneficial effects of the hydrogen supply system.

[0071] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0072] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0073] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A hydrogen supply system, characterized in that: include: Hydrogen combustion device; A hydrogen storage device, comprising a hydrogen storage bottle and a first valve disposed at the opening of the hydrogen storage bottle, wherein the first valve is used to control the opening of the opening of the hydrogen storage bottle, and the hydrogen storage bottle is connected to the hydrogen combustion device through the first valve; as well as A collecting device is used to collect leaked hydrogen, the collecting device includes a collecting tank and a first pressure sensor arranged on the collecting tank, the collecting tank is connected to the hydrogen storage bottle through the first valve, and the first pressure sensor is used to detect the pressure in the collecting tank.

2. The hydrogen supply system according to claim 1, characterized in that: The hydrogen supply system further comprises a hydrogen supply flow path, and two ends of the hydrogen supply flow path are respectively connected to the hydrogen combustion device and the first valve; The collecting tank comprises an air inlet and an air outlet, the air inlet is connected to the hydrogen storage bottle through the first valve, and the air outlet is connected to the hydrogen supply flow path.

3. The hydrogen supply system according to claim 2, characterized in that: The hydrogen supply system also includes a first ejector, a second ejector and a pressure reducing valve arranged in the hydrogen supply flow path, the first ejector is located between the pressure reducing valve and the first valve, the second ejector is located between the pressure reducing valve and the hydrogen combustion device, and the gas outlet can be connected to the first ejector and the second ejector respectively.

4. The hydrogen supply system according to claim 3, characterized in that: The hydrogen supply system also includes a first three-way valve, which includes a first inlet, a first outlet and a second outlet. The first inlet is connected to the gas outlet, the first outlet is connected to the first ejector through a first flow path, and the second outlet is connected to the second ejector through a second flow path.

5. The hydrogen supply system according to claim 4, characterized in that: A first one-way valve is provided on the first flow path to allow hydrogen to flow from the first three-way valve to the first ejector; and / or, A second one-way valve is disposed on the second flow path to allow hydrogen to flow from the first three-way valve to the second ejector.

6. The hydrogen supply system according to any one of claims 2 to 5, characterized in that: The hydrogen supply system further comprises an exhaust flow path and a second three-way valve, wherein the first valve is configured as a bottle mouth valve, and the bottle mouth valve comprises a first opening, a second opening and an exhaust port, wherein the first opening is connected to an end of the hydrogen supply flow path away from the hydrogen combustion device, the second opening is connected to the hydrogen storage bottle, one end of the exhaust flow path is connected to the exhaust port, and the other end of the exhaust flow path is connected to the outside; The second three-way valve includes a second inlet, a third outlet and a fourth outlet. The second three-way valve is arranged in the exhaust flow path. The exhaust port is connected to the second inlet, the third outlet is connected to the collection tank, and the fourth outlet is used to communicate with the outside.

7. The hydrogen supply system according to claim 6, characterized in that: A fourth one-way valve is provided on the flow path connecting the third outlet and the collecting tank, for allowing the hydrogen gas discharged from the second three-way valve to flow into the collecting tank.

8. The hydrogen supply system according to claim 6, characterized in that: The hydrogen supply flow path is connected to the exhaust flow path through a third flow path, the connection point between the third flow path and the exhaust flow path is located between the second three-way valve and the first valve, and a stop valve for controlling the opening and closing of the third flow path is provided on the third flow path; and / or, The hydrogen storage bottle also includes a hydrogen discharge port, and a bottle tail valve is provided at the hydrogen discharge port. The hydrogen storage bottle is connected to the exhaust flow path through the bottle tail valve.

9. A method for controlling a hydrogen supply system, characterized in that: Based on the hydrogen supply system according to any one of claims 1 to 8, the method comprises: When the pressure value of the first pressure sensor is greater than the set pressure of the pressure reducing valve, the first three-way valve is controlled to operate so that the collecting tank is connected to the first ejector; When the pressure value of the first pressure sensor is less than the set pressure of the pressure reducing valve, the first three-way valve is controlled to operate so that the collection tank is connected to the second ejector.

10. A vehicle, characterized in that: The vehicle comprises the hydrogen supply system as claimed in any one of claims 1-8.

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