A pressurizing system for a vehicle-mounted liquid hydrogen cylinder

Abstract

The utility model discloses a boosting system for a vehicle-mounted liquid hydrogen cylinder, including a liquid storage tank, a fuel cell and a vaporization component, wherein the vaporization component includes a second check valve, a stop valve, a flow valve, a vaporizer, a supercharger, a buffer tank and a proportional valve; liquid hydrogen enters the vaporizer from the liquid storage tank through the second check valve, the stop valve and the flow valve for gasification; the boosting component includes an air compressor, an intercooler and a three-way valve; one end of the intercooler is connected to the air compressor, and the other end of the intercooler is respectively connected to the supercharger and the fuel cell. In the utility model, through the integrated vaporization component and the supercharger component, a part of the air intake of the air compressor of the fuel cell is used to drive the supercharger to pressurize the hydrogen, thereby reducing the pressure requirements of the insulated gas cylinder and reducing the cost. In addition, through the arrangement in the utility model, the use space of the supercharger component and the vaporization component can be reduced, thereby making the overall system structure more compact.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid hydrogen gas supply systems, in particular to a pressurization system for a vehicle-mounted liquid hydrogen gas cylinder. Background Art

[0002] Liquid hydrogen has a high storage density and has certain advantages in hydrogen storage and transportation, especially for vehicle-mounted hydrogen storage, which has an obvious advantage of long driving range. The temperature of liquid hydrogen is very low (-253℃) and the pressure is normal pressure, while the hydrogen supply pressure required by the hydrogen fuel cell system is 1.6MPa and the temperature is normal temperature, which requires the liquid hydrogen to be gasified, heated and pressurized, so an effective gasification, heating and pressurization system is necessary.

[0003] In the prior art, for example, the technical solution described in the patent with publication number: CN217843507U: a liquid hydrogen pressurized gas supply system and vehicle, which realizes the pressurized gas supply to the liquid hydrogen bottle through multiple parts such as a liquid hydrogen bottle, a hydrogen supply pipeline, a pressurization branch, a pressure detection component, a second valve, a high-pressure hydrogen bottle, a pressure reducing valve, a buffer tank, a first stop valve, a safety branch, a safety hydrogen outlet pipeline and a safety hydrogen outlet pipeline.

[0004] In the prior art, the liquid hydrogen pressurized gas supply system has the problem that when the liquid hydrogen is pressurized, the air temperature vaporizer occupies a large space, which affects the overall layout. Utility Model Content

[0005] The utility model aims to provide a vehicle-mounted liquid hydrogen cylinder pressurization system to solve the problem in the prior art proposed in the background technology that when the liquid hydrogen is pressurized, the air temperature vaporizer occupies a large space, affecting the overall layout.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A boosting system for a vehicle-mounted liquid hydrogen cylinder comprises a liquid storage tank, a fuel cell, a vaporization assembly and a boosting assembly, wherein the liquid storage tank is connected to the fuel cell via the vaporization assembly; the boosting assembly is used to boost the liquid hydrogen;

[0008] The vaporization assembly includes a second check valve, a stop valve, an overflow valve, a vaporizer, a supercharger, a buffer tank, and a proportional valve; wherein one end of the second check valve is connected to the liquid storage tank, the other end of the second check valve is connected to one end of the stop valve, the other end of the stop valve is connected to one end of the overflow valve, the other end of the overflow valve is connected to one end of the vaporizer, the other end of the vaporizer is connected to one end of the supercharger, the other end of the supercharger is connected to the buffer tank and one end of the proportional valve, and the other end of the proportional valve is connected to the fuel cell;

[0009] The supercharging assembly includes an air compressor, an intercooler and a three-way valve; wherein one end of the intercooler is connected to the air compressor, the other end of the intercooler is connected to the three-way valve, and the three-way valve is connected to the supercharger and the fuel cell respectively.

[0010] According to the above technical solution, a hydrogenation port and a gas return port are provided on the liquid storage tank; wherein the hydrogenation port is used to inject liquid hydrogen into the interior of the liquid storage tank; and the gas return port is used to discharge the vaporized hydrogen from the liquid storage tank when filling liquid hydrogen.

[0011] According to the above technical solution, a first check valve is provided on the hydrogenation port, and a first safety valve, a second safety valve and a pressure gauge are provided on the gas return port.

[0012] According to the above technical solution, the first safety valve is also connected to the economic valve of the vaporization component; wherein one end of the economic valve is respectively connected to the second check valve and the stop valve, the other end of the economic valve is connected to the first safety valve, and the first safety valve is connected to the outside.

[0013] According to the above technical solution, the boost system also includes a cooling component; the cooling component is used to cool the vaporization component and the fuel cell.

[0014] According to the above technical solution, the cooling component includes a first pipe, a second pipe and a third pipe; wherein, the two ends of the first pipe are respectively connected to the carburetor and the intercooler, the two ends of the second pipe are respectively connected to the carburetor and the intercooler, and the first pipe and the second pipe constitute a circulation pipe; the two ends of the third pipe are respectively connected to the first pipe and the second pipe, and the third pipe is used for cooling the fuel cell.

[0015] According to the above technical solution, a water pump is further provided on the first pipeline, and a thermostat is provided on the second pipeline, and the thermostat is used to connect the first pipeline and the second pipeline.

[0016] According to the above technical solution, the boosting component also includes a back pressure valve, one end of the back pressure valve is connected to the three-way valve, and the other end of the back pressure valve is connected to the muffler, and the muffler is used to discharge compressed air.

[0017] According to the above technical solution, the muffler is also connected to the supercharger and the hydrogen circulation pump respectively, and the hydrogen circulation pump is used for hydrogen circulation of the fuel cell.

[0018] According to the above technical solution, the vaporization component also includes a third safety valve, and the third safety valve is connected to the buffer tank and the proportional valve respectively.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] In the utility model, by integrating the vaporization component and the pressurization component, a part of the intake air of the fuel cell air compressor is used to drive the supercharger to pressurize the hydrogen, thereby reducing the pressure requirement of the insulated gas cylinder and reducing the cost. In addition, through the arrangement in the utility model, the use space of the supercharging component and the vaporization component can be reduced, thereby making the overall system structure more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the system structure of the utility model.

[0022] Markings in the figure: 100-liquid storage tank, 200-fuel cell, 300-second check valve, 400-stop valve, 500-flow valve, 600-carburetor, 700-supercharger, 800-buffer tank, 900-proportional valve, 110-air compressor, 111-intercooler, 112-three-way valve, 113-hydrogenation port, 114-return port, 115-first check valve, 116-second safety valve, 117-pressure gauge, 118-economic valve, 119-first safety valve, 120-first pipeline, 121-second pipeline, 122-third pipeline, 123-water pump, 124-thermostat, 125-back pressure valve, 126-muffler, 127-hydrogen circulation pump, 128-third safety valve. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1

[0025] like Figure 1 As shown, a boosting system for a vehicle-mounted liquid hydrogen cylinder includes a liquid storage tank 100, a fuel cell 200, a vaporization component, and a boosting component, wherein the liquid storage tank 100 is connected to the fuel cell 200 via the vaporization component; the boosting component is used to boost the gaseous hydrogen after the liquid hydrogen is vaporized;

[0026] The vaporization assembly includes a second check valve 300, a stop valve 400, an overflow valve 500, a vaporizer 600, a supercharger 700, a buffer tank 800 and a proportional valve 900; wherein one end of the second check valve 300 is connected to the liquid storage tank 100, the other end of the second check valve 300 is connected to one end of the stop valve 400, the other end of the stop valve 400 is connected to one end of the overflow valve 500, the other end of the overflow valve 500 is connected to one end of the vaporizer 600, the other end of the vaporizer 600 is connected to one end of the supercharger 700, the other end of the supercharger 700 is connected to the buffer tank 800 and one end of the proportional valve 900, and the other end of the proportional valve 900 is connected to the fuel cell 200;

[0027] The supercharging assembly includes an air compressor 110, an intercooler 111 and a three-way valve 112; wherein one end of the intercooler 111 is connected to the air compressor 110, and the other end of the intercooler 111 is connected to the three-way valve 112, and the three-way valve 112 is connected to the supercharger 700 and the fuel cell 200 respectively.

[0028] In the present invention, by integrating the vaporization component and the pressurization component, a part of the air intake of the air compressor of the fuel cell 200 is used to drive the supercharger 700 to pressurize the hydrogen, thereby reducing the pressure requirements of the insulated gas cylinder and reducing the cost. In addition, through the arrangement in the present invention, the use space of the pressurization component and the vaporization component can be reduced, thereby making the overall system structure more compact.

[0029] Embodiment 2

[0030] This embodiment is a further refinement of the first embodiment.

[0031] The liquid storage tank 100 is provided with a hydrogenation port 113 and a gas return port 114 ; the hydrogenation port 113 is used to inject liquid hydrogen into the liquid storage tank 100 ; the gas return port 114 is used to discharge the gasified hydrogen out of the liquid storage tank 100 .

[0032] The hydrogenation port 113 is provided with a first check valve 115 , and the gas return port 114 is provided with a first safety valve 119 , a second safety valve 116 and a pressure gauge 117 .

[0033] The first safety valve 119 is also connected to the economic valve 118 of the vaporization component; wherein one end of the economic valve 118 is respectively connected to the second check valve 300 and the stop valve 400, and the other end of the economic valve 118 is connected to the first safety valve 119, and the first safety valve 119 is connected to the outside.

[0034] Specifically, the economic valve 118 is a self-acting pressure regulating valve. When the pressure in the liquid storage tank reaches a set pressure, the economic valve opens automatically to reduce the pressure in the liquid storage tank.

[0035] The boost system further includes a cooling component; the cooling component is used to cool down the vaporization component and the fuel cell 200 .

[0036] The cooling assembly includes a first pipe 120, a second pipe 121 and a third pipe 122; wherein, the two ends of the first pipe 120 are respectively connected to the carburetor 600 and the intercooler 111, and the two ends of the second pipe 121 are respectively connected to the carburetor 600 and the intercooler 111, and the first pipe 120 and the second pipe 121 form a circulation pipe; the two ends of the third pipe 122 are respectively connected to the first pipe 120 and the second pipe 121, and the third pipe 122 is used for cooling the fuel cell 200.

[0037] A water pump 123 is further provided on the first pipeline 120 , and a thermostat 124 is provided on the second pipeline 121 . The thermostat 124 is used to connect the first pipeline 120 and the second pipeline 121 .

[0038] The boosting assembly further includes a back pressure valve 125 , one end of the back pressure valve 125 is connected to the three-way valve 112 , and the other end of the back pressure valve 125 is connected to a muffler 126 , and the muffler 126 is used to discharge compressed air.

[0039] The silencer 126 is also connected to the supercharger 700 and the hydrogen circulation pump 127 , respectively. The hydrogen circulation pump 127 is used for hydrogen circulation of the fuel cell 200 .

[0040] The vaporization assembly further includes a third safety valve 128 , which is connected to the buffer tank 800 and the proportional valve 900 , respectively.

[0041] Specifically, the components used in the present invention are all existing devices and will not be described in detail here.

[0042] The working principle of the utility model is as follows: Figure 1 As shown, a liquid hydrogen vehicle uses a filling machine to fill liquid hydrogen into a liquid storage tank 100 through a hydrogen filling port 113 at a hydrogen filling station, and a return port 114 returns the gasified hydrogen to the hydrogen filling station. The liquid storage tank 100 is equipped with a pressure gauge 117 and a liquid level gauge, as well as a first safety valve 119 and a second safety valve 116.

[0043] When in use, the stop valve 400 is opened, and the liquid hydrogen enters the vaporizer 600 from the liquid storage tank 100 through the second check valve 300, the stop valve 400 and the overflow valve 500 for gasification. The vaporizer 600 is a microchannel vaporizer 600, and the coolant of the fuel cell 200 is used to gasify the liquid hydrogen. The coldness of the liquid hydrogen can cool the coolant of the fuel cell 200, avoiding waste of coldness, and can replace the traditional coolant radiator.

[0044] The gasified hydrogen enters the buffer tank 800 after passing through the supercharger 700. The supercharger 700 is an air-driven supercharger 700. The air source is the compressed air provided by the air compressor 110 of the supercharging component. The air is compressed by the air compressor 110 and then enters the intercooler 111 for cooling. After cooling, part of the compressed air is divided into the fuel cell 200 through the three-way valve 112, and part of the compressed air enters the supercharger 700 to pressurize the hydrogen to meet the hydrogen supply pressure requirement of the fuel cell 200. A third safety valve 128 is provided here to avoid danger caused by excessive hydrogen pressure.

[0045] The pressurized hydrogen enters the buffer tank 800 and then enters the fuel cell 200 through the proportional valve 900 to undergo a chemical reaction with the air.

[0046] The water pump 123 in the cooling assembly is used to drive the circulation of the coolant, and the thermostat 124 is used to adjust the flow of different circuits of the coolant, thereby controlling the temperature of the coolant. After the air and hydrogen enter the fuel cell 200 and undergo chemical reactions, they are discharged through the muffler 126 together with the driving gas of the supercharging circuit.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pressurizing system for a vehicle-mounted liquid hydrogen cylinder, characterized in that: It comprises a liquid storage tank (100), a fuel cell (200), a vaporization component and a pressurization component, wherein the liquid storage tank (100) and the fuel cell (200) are connected via the vaporization component; the pressurization component is used to pressurize the gasified hydrogen; The vaporization assembly comprises a second check valve (300), a stop valve (400), an overflow valve (500), a vaporizer (600), a supercharger (700), a buffer tank (800) and a proportional valve (900); wherein one end of the second check valve (300) is connected to the liquid storage tank (100), the other end of the second check valve (300) is connected to one end of the stop valve (400), the other end of the stop valve (400) is connected to one end of the overflow valve (500), the other end of the overflow valve (500) is connected to one end of the vaporizer (600), the other end of the vaporizer (600) is connected to one end of the supercharger (700), the other end of the supercharger (700) is connected to the buffer tank (800) and one end of the proportional valve (900), and the other end of the proportional valve (900) is connected to the fuel cell (200); The supercharging component comprises an air compressor (110), an intercooler (111) and a three-way valve (112); wherein one end of the intercooler (111) is connected to the air compressor (110), the other end of the intercooler (111) is connected to the three-way valve (112), and the three-way valve (112) is respectively connected to the supercharger (700) and the fuel cell (200).

2. The pressurizing system for a vehicle-mounted liquid hydrogen cylinder according to claim 1, characterized in that: The liquid storage tank (100) is provided with a hydrogenation port (113) and a gas return port (114); wherein the hydrogenation port (113) is used to inject liquid hydrogen into the liquid storage tank (100); and the gas return port (114) is used to discharge gasified hydrogen from the liquid storage tank (100) when liquid hydrogen is added.

3. The boosting system for a vehicle-mounted liquid hydrogen cylinder according to claim 2, characterized in that: A first check valve (115) is provided on the hydrogenation port (113), and a first safety valve (119), a second safety valve (116) and a pressure gauge (117) are provided on the gas return port (114).

4. The boosting system for a vehicle-mounted liquid hydrogen cylinder according to claim 3 is characterized in that: The first safety valve (119) is also connected to the economic valve (118) of the vaporization component; wherein one end of the economic valve (118) is respectively connected to the second check valve (300) and the stop valve (400), and the other end of the economic valve (118) is connected to the first safety valve (119), and the first safety valve (119) is in communication with the outside.

5. The boosting system for a vehicle-mounted liquid hydrogen cylinder according to claim 1, characterized in that: The boost system also includes a cooling component; the cooling component is used to cool the vaporization component and the fuel cell (200).

6. The boosting system for a vehicle-mounted liquid hydrogen cylinder according to claim 5, characterized in that: The cooling assembly comprises a first pipe (120), a second pipe (121) and a third pipe (122); wherein two ends of the first pipe (120) are respectively connected to the carburetor (600) and the intercooler (111), and two ends of the second pipe (121) are respectively connected to the carburetor (600) and the intercooler (111), and the first pipe (120) and the second pipe (121) form a circulation pipe; and two ends of the third pipe (122) are respectively connected to the first pipe (120) and the second pipe (121), and the third pipe (122) is used for cooling the fuel cell (200).

7. The pressurizing system for a vehicle-mounted liquid hydrogen cylinder according to claim 6, characterized in that: A water pump (123) is also provided on the first pipeline (120), and a thermostat (124) is provided on the second pipeline (121); the thermostat (124) is used to connect the first pipeline (120) and the second pipeline (121).

8. The boosting system for a vehicle-mounted liquid hydrogen cylinder according to claim 1, characterized in that: The booster assembly further comprises a back pressure valve (125), one end of the back pressure valve (125) being connected to the three-way valve (112), and the other end of the back pressure valve (125) being connected to a muffler (126), and the muffler (126) being used to discharge compressed air.

9. A vehicle-mounted liquid hydrogen cylinder pressurization system according to claim 8, characterized in that: The silencer (126) is also connected to the supercharger (700) and the hydrogen circulation pump (127) respectively. The hydrogen circulation pump (127) is used for hydrogen circulation of the fuel cell (200).

10. The vehicle-mounted liquid hydrogen cylinder pressurization system according to claim 1, characterized in that: The vaporization assembly further comprises a third safety valve (128), and the third safety valve (128) is respectively connected to the buffer tank (800) and the proportional valve (900).

Images