Hydrogenation method and hydrogen refueling station

Abstract

The invention provides a hydrogenation method and a hydrogenation station. The hydrogenation method comprises the following steps: setting an initial flow input into a hydrogenation machine; hydrogenation is carried out on the hydrogenation machine through a plurality of gas tanks with different pressures, and the real-time flow output by a hydrogenation pipeline is detected; and adjusting the flow of the hydrogenation pipeline and switching a gas tank communicated with the hydrogenation pipeline, so that the real-time flow is equal to the initial flow. By adopting the method, a plurality of gas tanks with different pressures are arranged to perform hydrogenation on the hydrogenation machine respectively, the opening degree of the hydrogenation pipeline can be adjusted, and the gas tanks communicated with the hydrogenation pipeline can be switched, so that the aim of keeping the real-time flow equal to the initial flow in the hydrogenation process is fulfilled; the problems that in the prior art, due to the fact that the real-time flow change of a hydrogen refueling station in the hydrogenation process is large, cooling power consumption of a cooling unit is high, energy consumption is large, and the operation cost of the hydrogen refueling station is high are effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of large-flow hydrogen refueling stations, and in particular to a hydrogen refueling method and a hydrogen refueling station. Background Art

[0002] With growing environmental awareness, new energy vehicles, especially hydrogen-powered vehicles, are becoming increasingly popular. 35MPa hydrogen refueling stations are used to refill hydrogen tanks in hydrogen-powered vehicles. To reduce refueling time, high-flow hydrogen refueling technology is booming.

[0003] Among them, the 35MPa high-flow hydrogen refueling station mainly includes a hydrogen compressor, a hydrogen storage tank, and a hydrogen refueling machine. The hydrogen compressor is used to compress the hydrogen and then send it to the hydrogen storage tank. The hydrogen refueling machine absorbs the hydrogen in the hydrogen storage tank and sends it to the vehicle storage tank. During the hydrogen transportation process, the hydrogen compressor consumes power when compressing the hydrogen, which causes the hydrogen pressure to increase and expand, thereby generating heat. When refueling the vehicle hydrogen storage tank with high-flow hydrogen, in order to obtain more hydrogen, faster and safely, the hydrogen at ambient temperature must be cooled to the optimal design temperature (-35°C) for entering the vehicle hydrogen storage tank. Therefore, a hydrogen refueling station cooling unit is required. The cooling unit uses a chiller to generate a low-temperature medium during the hydrogen transportation process, and then uses the low-temperature medium to convectively transfer heat to the hydrogen, producing low-temperature hydrogen. Existing hydrogen refueling stations have long hydrogen refueling times and, when the real-time flow rate fluctuates significantly during a single hydrogenation process, there are problems with the cooling unit's high cooling power consumption, high energy consumption, and high operating costs of the hydrogen refueling station. If the automatic control fails to respond in a timely manner, the cooling unit will face the risk of intermediate refrigerant solidification. Summary of the Invention

[0004] The present invention provides a hydrogenation method and a hydrogenation station, which at least solve the problem in the prior art that the real-time flow rate in the hydrogenation process varies greatly, resulting in high cooling power consumption of the cooling unit, high energy consumption, and high operating cost of the hydrogenation station.

[0005] In order to solve the above problems, according to one aspect of the present invention, the present invention provides a hydrogenation method, which is applied to a hydrogenation station. The hydrogenation station includes a hydrogenation pipeline, a hydrogenation machine, a sequential control panel, a cooling unit and a plurality of gas tanks of different pressures for storing hydrogen. The cooling unit is connected to the hydrogenation pipeline to cool the hydrogen in the hydrogenation pipeline. The hydrogen in the gas tank is transported to the hydrogenation machine through the sequential control panel, the hydrogenation pipeline and the cooling unit. The hydrogenation method includes: setting an initial flow rate input to the hydrogenation machine; hydrogenating the hydrogenation machine through a plurality of gas tanks of different pressures, detecting the real-time flow rate output from the hydrogenation pipeline; adjusting the flow rate of the hydrogenation pipeline and switching the gas tanks connected to the hydrogenation pipeline so that the real-time flow rate is equal to the initial flow rate.

[0006] Furthermore, the multiple gas tanks include low-pressure gas tanks, medium-pressure gas tanks and high-pressure gas tanks, and adding hydrogen to the hydrogenator through multiple gas tanks with different pressures includes: in a first time period, adding hydrogen to the hydrogenator through a low-pressure gas tank; in a second time period, adding hydrogen to the hydrogenator through a medium-pressure gas tank; in a third time period, adding hydrogen to the hydrogenator through a high-pressure gas tank until the hydrogenation is completed.

[0007] Furthermore, the inlet of the sequential control panel can be selectively connected to any gas tank, and the outlet of the sequential control panel is connected to the inlet of the hydrogenation pipeline, and a regulating valve is provided on the hydrogenation pipeline; when the opening of the regulating valve reaches the maximum value and the real-time flow value is less than the initial flow value, the sequential control panel and the currently connected gas tank are disconnected, and the sequential control panel is connected to the gas tank with higher pressure.

[0008] According to another aspect of the present invention, a hydrogen refueling station is provided. The hydrogen refueling station applies the above-mentioned hydrogen refueling method. The hydrogen refueling station includes a control unit, which is electrically connected to a sequence control panel, a flow meter on a hydrogen refueling pipeline, and a regulating valve. The control unit receives a real-time flow signal detected by the flow meter, controls the sequence control panel to be connected to a corresponding gas tank, and controls the valve opening of the regulating valve in real time.

[0009] Furthermore, the multiple gas tanks of the hydrogen filling station include low-pressure gas tanks, medium-pressure gas tanks and high-pressure gas tanks. There are at least two groups of low-pressure gas tanks, medium-pressure gas tanks and high-pressure gas tanks. The two groups of low-pressure gas tanks are connected to the sequence control panel in a switchable manner to replenish and supply gas in turn. The two groups of medium-pressure gas tanks are connected to the sequence control panel in a switchable manner to replenish and supply gas in turn. The two groups of high-pressure gas tanks are connected to the sequence control panel in a switchable manner to replenish and supply gas in turn.

[0010] Furthermore, the hydrogen refueling station also includes a compressor unit, which is connected to the low-pressure gas tank, the medium-pressure gas tank and the high-pressure gas tank in a switchable manner, and the compressor unit is used to replenish gas to the low-pressure gas tank, the medium-pressure gas tank and the high-pressure gas tank.

[0011] Furthermore, the compressor unit includes a low-pressure compressor unit, a medium-pressure compressor unit and a high-pressure compressor unit. The low-pressure compressor unit and the low-pressure gas tank can be connected in a disconnected manner, and the low-pressure compressor unit is used to replenish low-pressure hydrogen into the low-pressure gas tank. The medium-pressure compressor unit and the medium-pressure gas tank can be connected in a disconnected manner, and the medium-pressure compressor unit is used to replenish medium-pressure hydrogen into the medium-pressure gas tank. The high-pressure compressor unit and the high-pressure gas tank can be connected in a disconnected manner, and the high-pressure compressor unit is used to replenish high-pressure hydrogen into the high-pressure gas tank.

[0012] Furthermore, the hydrogen refueling station also includes a fuel cell group, which is used to supply power to the cooling unit and / or the compressor unit.

[0013] Furthermore, the hydrogen refueling station further includes a one-way valve provided on the hydrogen refueling pipeline, and the one-way valve is used to prevent the hydrogen in the hydrogen refueling pipeline from flowing back.

[0014] Furthermore, the hydrogen refueling station also includes a stop valve arranged on the hydrogen refueling pipeline, and the stop valve is used to control the flow of hydrogen in the hydrogen refueling pipeline.

[0015] By applying the technical solution of the present invention, a hydrogenation method is provided, which is applied to a hydrogenation station. The hydrogenation station includes a hydrogenation pipeline, a hydrogenation machine, a sequential control panel, a cooling unit and multiple gas tanks of different pressures for storing hydrogen. The cooling unit is connected to the hydrogenation pipeline to cool the hydrogen in the hydrogenation pipeline. The hydrogen in the gas tank is transported to the hydrogenation machine via the sequential control panel, the hydrogenation pipeline and the cooling unit. The hydrogenation method includes: setting an initial flow rate input to the hydrogenation machine; hydrogenating the hydrogenation machine through multiple gas tanks of different pressures, detecting the real-time flow rate output from the hydrogenation pipeline; adjusting the flow rate of the hydrogenation pipeline and switching the gas tanks connected to the hydrogenation pipeline so that the real-time flow rate is equal to the initial flow rate. By adopting this method, multiple gas tanks with different pressures are set up to add hydrogen to the hydrogenator respectively, and the flow of the hydrogenation pipeline can be adjusted and the gas tanks connected to the hydrogenation pipeline can be switched, so as to achieve the purpose of keeping the real-time flow equal to the initial flow during the hydrogenation process. This effectively solves the problem in the prior art that the real-time flow of the hydrogenation station during the hydrogenation process varies greatly, resulting in high cooling power consumption of the cooling unit, high energy consumption, and high operating cost of the hydrogenation station. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 A flow chart of a hydrogenation method provided by an embodiment of the present invention is shown;

[0018] Figure 2 A schematic diagram of a hydrogen refueling station provided by another embodiment of the present invention is shown;

[0019] Figure 3 A schematic diagram showing the relationship between hydrogenation time, pressure and hydrogenation quality provided by an embodiment of the present invention is shown.

[0020] The above drawings include the following reference numerals:

[0021] 10. Hydrogenation pipeline;

[0022] 20. Hydrogen refueling machine;

[0023] 30. Sequence control panel;

[0024] 41. Flow meter; 42. Control valve; 43. Cooling unit; 44. Low-pressure compressor unit; 45. Medium-pressure compressor unit; 46. High-pressure compressor unit;

[0025] 51. Low-pressure gas tank; 52. Medium-pressure gas tank; 53. High-pressure gas tank;

[0026] 61. Fuel cell stack; 62. One-way valve; 63. Shut-off valve. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative work are within the scope of protection of the present invention.

[0028] like Figure 1 As shown, an embodiment of the present invention provides a hydrogenation method, which is applied to a hydrogenation station. The hydrogenation station includes a hydrogenation pipeline 10, a hydrogenator 20, a sequential control panel 30, a cooling unit 43 and a plurality of gas tanks of different pressures for storing hydrogen. The cooling unit 43 is connected to the hydrogenation pipeline 10 to cool the hydrogen in the hydrogenation pipeline 10. The hydrogen in the gas tank is transported to the hydrogenator 20 via the sequential control panel 30, the hydrogenation pipeline 10 and the cooling unit 43. The hydrogenation method includes: setting an initial flow rate input to the hydrogenator 20; hydrogenating the hydrogenator 20 through a plurality of gas tanks of different pressures, detecting the real-time flow rate output from the hydrogenation pipeline 10; adjusting the flow rate of the hydrogenation pipeline 10 and switching the gas tanks connected to the hydrogenation pipeline 10 so that the real-time flow rate is equal to the initial flow rate.

[0029] By adopting this method, multiple gas tanks with different pressures are set to add hydrogen to the hydrogenator 20 respectively, and the flow of the hydrogenation pipeline 10 can be adjusted and the gas tanks connected to the hydrogenation pipeline 10 can be switched, so as to achieve the purpose of keeping the real-time flow equal to the initial flow during the hydrogenation process. This solves the problem in the prior art that the real-time flow of the hydrogenation station during the hydrogenation process varies greatly, resulting in high cooling power consumption of the cooling unit, high energy consumption, and high operating cost of the hydrogenation station.

[0030] It should be noted that when refueling hydrogen, high flow means that the refueling time of a commercial truck exceeds 8 minutes.

[0031] Among them, the multiple gas tanks include a low-pressure gas tank 51, a medium-pressure gas tank 52 and a high-pressure gas tank 53. Adding hydrogen to the hydrogenator 20 through multiple gas tanks with different pressures includes: in a first time period, adding hydrogen to the hydrogenator 20 through the low-pressure gas tank 51; in a second time period, adding hydrogen to the hydrogenator 20 through the medium-pressure gas tank 52; in a third time period, adding hydrogen to the hydrogenator 20 through the high-pressure gas tank 53 until the hydrogenation is completed.

[0032] This method can meet the situation of adding hydrogen to the hydrogenator 20 during actual application.

[0033] In the embodiment of this solution, a commercial vehicle equipped with a 35MPa, 210L hydrogen storage bottle and a hydrogen storage system of 8 bottles is filled with gas in 5 minutes at a high-flow hydrogen station. The hydrogenation strategy is: 30MPa and a volume of 3m3 are applied in 0-140s. 3 Gas tank filling; 140-220s application 37MPa volume 3m 3 Fill the gas tank; 220s-end application 45MPa volume 3m 3 The tank was filled with hydrogen. At 278 seconds, the filling mass reached 37.7 kg, and the soc was 96.6%. The tank then continued to add hydrogen at a flow rate of less than 0.125 kg / s until the end.

[0034] The first time period is 0-140s; the second time period is 140-220s; and the third time period is 220s-end.

[0035] Specifically, the inlet of the sequential control panel 30 can be selectively connected to any gas tank, and the outlet of the sequential control panel 30 is connected to the inlet of the hydrogenation pipeline 10, on which a regulating valve 42 is provided. When the opening of the regulating valve 42 reaches the maximum value and the real-time flow rate is less than the initial flow rate, the sequential control panel 30 is disconnected from the currently connected gas tank, and the sequential control panel 30 is connected to a gas tank with higher pressure.

[0036] With the above-mentioned setting, when the opening of the regulating valve 42 reaches the maximum value and the real-time flow value is still less than the initial flow value, it can be determined that the pressure of the currently connected gas tank is insufficient, and it is necessary to connect to a gas tank with a higher pressure through the sequential control disk 30 to ensure that the real-time flow value is equal to the initial flow value.

[0037] Optionally, a flow meter 41 is provided on the hydrogenation pipeline 10, and the hydrogenation method further includes: after hydrogenation to the hydrogenation machine 20 is completed, the total hydrogen mass is calculated by the real-time flow meter 41 detected by the flow meter 41 to calculate the hydrogenation price.

[0038] With such an arrangement, after hydrogen filling is completed, the flow meter 41 integrates the real-time flow rate with time to obtain the total mass of hydrogen filled during the hydrogenation process, and then calculates the hydrogenation price.

[0039] like Figure 2As shown, another embodiment of the present invention provides a hydrogen refueling station, which applies the above-mentioned hydrogenation method. The hydrogen refueling station includes a control unit, which is electrically connected to the sequence control disk 30, the flow meter 41 on the hydrogenation pipeline 10, and the regulating valve 42. The control unit receives the real-time flow signal detected by the flow meter 41, controls the sequence control disk 30 to be connected with the corresponding gas tank, and controls the valve opening of the regulating valve 42 in real time.

[0040] By adopting this solution, the control unit can receive the real-time flow signal detected by the flow meter 41 to control the valve opening of the regulating valve 42. The control unit controls the sequential control disk 30 to connect with the corresponding gas tank, thereby improving the degree of automation of the hydrogen refueling station.

[0041] Among them, the multiple gas tanks of the hydrogen refueling station include low-pressure gas tanks 51, medium-pressure gas tanks 52 and high-pressure gas tanks 53. The low-pressure gas tanks 51, medium-pressure gas tanks 52 and high-pressure gas tanks 53 are at least two groups. The two groups of low-pressure gas tanks 51 are connected to the sequence control panel 30 in a switchable manner to replenish and supply gas in turn. The two groups of medium-pressure gas tanks 52 are connected to the sequence control panel 30 in a switchable manner to replenish and supply gas in turn. The two groups of high-pressure gas tanks 53 are connected to the sequence control panel 30 in a switchable manner to replenish and supply gas in turn.

[0042] This will not delay the operation of the hydrogen refueling station. The pressure of the low-pressure gas tank 51 is 30 MPa, the pressure of the medium-pressure gas tank 52 is 37 MPa, and the pressure of the high-pressure gas tank 53 is 40 MPa. The total volume of each group of gas tanks is 6 cubic meters.

[0043] Furthermore, the hydrogen refueling station also includes a compressor unit, which is connected to the low-pressure gas tank 51, the medium-pressure gas tank 52 and the high-pressure gas tank 53 in a switchable manner, and is used to replenish gas to the low-pressure gas tank 51, the medium-pressure gas tank 52 and the high-pressure gas tank 53.

[0044] Such an arrangement can ensure that the low-pressure gas tank 51, the medium-pressure gas tank 52 and the high-pressure gas tank 53 are always filled with gas, thereby ensuring the stable operation of the hydrogen refueling station.

[0045] Among them, the compressor unit includes a low-pressure compressor unit 44, a medium-pressure compressor unit 45 and a high-pressure compressor unit 46. The low-pressure compressor unit 44 and the low-pressure gas tank 51 can be connected in a disconnected manner. The low-pressure compressor unit 44 is used to replenish low-pressure hydrogen to the low-pressure gas tank 51. The medium-pressure compressor unit 45 and the medium-pressure gas tank 52 can be connected in a disconnected manner. The medium-pressure compressor unit 45 is used to replenish medium-pressure hydrogen to the medium-pressure gas tank 52. The high-pressure compressor unit 46 and the high-pressure gas tank 53 can be connected in a disconnected manner. The high-pressure compressor unit 46 is used to replenish high-pressure hydrogen to the high-pressure gas tank 53.

[0046] This arrangement can continuously replenish hydrogen to the low-pressure gas tank 51 , the medium-pressure gas tank 52 and the high-pressure gas tank 53 , thereby ensuring the normal operation of the hydrogen refueling station.

[0047] In this embodiment, the hydrogen refueling station further includes a fuel cell group 61, which is used to supply power to the cooling unit 43 and / or the compressor group.

[0048] Since the cooling power of the cooling unit 43 is too high, it is difficult to obtain such a high load electricity permit during the construction of the hydrogen station. In this solution, the fuel cell group 61 is set to enable the hydrogen station to generate and use electricity by itself, reducing the requirements for the electricity load of the hydrogen station construction.

[0049] The hydrogenation station further includes a one-way valve 62 provided on the hydrogenation pipeline 10 , and the one-way valve 62 is used to prevent the hydrogen in the hydrogenation pipeline 10 from flowing back.

[0050] The hydrogenation station further includes a stop valve 63 provided on the hydrogenation pipeline 10 , and the stop valve 63 is used to control the flow of hydrogen in the hydrogenation pipeline 10 .

[0051] With the above arrangement, the stop valve 63 can be provided to control the flow of hydrogen in the hydrogen filling station, and the one-way valve 62 can prevent the backflow of hydrogen in the hydrogen filling station.

[0052] The embodiments of this scheme are as follows:

[0053] The hydrogen refueling process at a high-flow hydrogen refueling station is introduced by taking the example of a commercial vehicle equipped with a 35MPa, 210L hydrogen storage bottle and a hydrogen storage system of 8 bottles being filled with gas in 5 minutes at a high-flow hydrogen refueling station.

[0054] The hydrogen storage system can store 39 kg of hydrogen when soc100%. Assuming that the pressure in the vehicle gas cylinder is 2 MPa during hydrogen filling, the total hydrogen filling process requires 37 kg of gas, and the real-time flow rate is 0.12 kg / s. The pressure and volume of the hydrogen storage tank at the hydrogen filling station are 30 MPa and 6 m3 respectively. 3 ;37MPa,6m 3 ; 45MPa, 6m 3 .

[0055] At a real-time flow rate of 0.125Kg / s, Figure 3 As shown in the figure, the black line represents the inlet pressure required by the hydrogen station tank to ensure this flow rate. The difference between the tank pressure and the source inlet pressure is the pressure drop that the regulating valve must adjust. If the flow rate does not reach the rated flow rate when the regulating valve is fully opened, the sequential control panel is used to replace the gas tank with a higher pressure gas tank to refill the cylinder.

[0056] The hydrogenation strategy is: 30MPa in a volume of 3m3 at 0-140s 3 Gas tank filling; 140-220s application 37MPa volume 3m 3 Fill the gas tank; 220s-end application 45MPa volume 3m 3The tank was filled with hydrogen. At 278 seconds, the filling mass reached 37.7 kg, and the soc was 96.6%. The tank then continued to add hydrogen at a flow rate of less than 0.125 kg / s until the end.

[0057] If the initial pressure in the onboard gas cylinder is higher than 2MPa when the hydrogen vehicle is refueling, the flow rate of 0.125Kg / s is still guaranteed (to ensure that the cooling power does not change and the refueling logic does not change). The sequence control panel controls the refueling order of the gas tanks, and the refueling order is still to fill the low, medium and high pressure gas tanks in sequence. If the flow rate does not reach the rated flow rate when the regulating valve is opened to the maximum, the sequence control panel is used to replace the gas tank with a higher pressure gas tank to refuel the gas cylinder.

[0058] In addition, the energy consumption of this patent is calculated as follows:

[0059] The calculated hydrogen temperature change is from 40°C to -35°C, the cooling time is 5 minutes, the specific heat of nitrogen is 14.3 kJ / kg / K, and the energy required to cool 37 kg of hydrogen is 75*14*37*1e-3=38.8 kJ.

[0060] Power is drawn from the grid, and the cooling system is used for cooling: Assuming a two-stage cooling system with a primary cooling system to -15°C and a secondary cooling system to -37°C, the primary cooling system has an energy consumption ratio of 1.5 and a secondary cooling system has an energy consumption ratio of 0.9. When the conversion efficiency is 70%, the primary cooling power is 0.12*55*14.3 / 0.7 / 1.5 = 90 kW, and the secondary cooling power is 0.12*22*14.3 / 0.7 / 0.9 = 60 kW, for a total cooling system power of 150 kW. The electricity required to refuel a vehicle is 12.5 kW / h. Assuming a commercial electricity price of 0.8 yuan / kWh, the cooling cost per vehicle is 10 yuan.

[0061] Liquid nitrogen cooling: Nitrogen has a specific heat of 1 kJ / kg / kilogram and a latent heat of vaporization of 161 kJ / kg. The temperature of hydrogenated nitrogen rises from -196°C to -46°C. One kilogram of liquid nitrogen provides a cooling capacity of (1*150*1+161)*1e-3=0.3 kj. At a heat exchange efficiency of 70%, 184 kilograms of liquid nitrogen are required to cool 37 kilograms of hydrogen. Assuming a liquid nitrogen price of 700 yuan / ton, the cooling cost per vehicle is 129 yuan.

[0062] The fuel cell stack generates its own electricity, and the cooling unit provides cooling: The heat of hydrogen combustion is 1.4e5 KJ / kg. Assuming a fuel cell power generation efficiency of 50% and a hydrogen price of 35 yuan / kg, the cooling power required for a hydrogen refueling vehicle is 12.5 KWh. The cooling cost is 22.4 yuan.

[0063] Without using grid electricity, the cost of hydrogen refueling and cooling per vehicle is approximately RMB 10 using grid electricity, RMB 22 using fuel cell self-generated electricity, and RMB 129 using liquid nitrogen cooling. The total price of hydrogen is approximately RMB 1,300.

[0064] The two sets of gas tanks in each group rotate between filling and deflating to ensure that the hydrogen filling station can always be filled. Taking a 45MPa high-pressure gas tank as an example, the principle is that when the upper gas tank is replenishing gas and the lower gas tank is supplying hydrogen, the upper gas tank can be replenished by the compressor while the lower gas tank can continue to be filled normally.

[0065] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0066] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0067] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0068] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0069] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0070] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A hydrogenation method, applied to a hydrogenation station, wherein the hydrogenation station comprises a hydrogenation pipeline (10), a hydrogenation machine (20), a sequence control panel (30), a cooling unit (43) and a plurality of gas tanks of different pressures for storing hydrogen, wherein the cooling unit (43) is connected to the hydrogenation pipeline (10) to cool the hydrogen in the hydrogenation pipeline (10), and the hydrogen in the gas tank is transported to the hydrogenation machine (20) via the sequence control panel (30), the hydrogenation pipeline (10) and the cooling unit (43), characterized in that: The hydrogenation method comprises: Setting an initial flow rate input to the hydrogenation machine (20); hydrogenating the hydrogenator (20) through a plurality of gas tanks with different pressures, and detecting the real-time flow rate outputted by the hydrogenating pipeline (10); The flow rate of the hydrogenation pipeline (10) is adjusted and the gas tank connected to the hydrogenation pipeline (10) is switched so that the real-time flow rate is equal to the initial flow rate.

2. The hydrogenation method according to claim 1, characterized in that The plurality of gas tanks include a low-pressure gas tank (51), a medium-pressure gas tank (52) and a high-pressure gas tank (53), and adding hydrogen to the hydrogenator (20) through the plurality of gas tanks with different pressures includes: In a first time period, hydrogen is added to the hydrogenator (20) through the low-pressure gas tank (51); In a second time period, hydrogen is added to the hydrogenator (20) through the medium-pressure gas tank (52); In the third time period, hydrogen is added to the hydrogenator (20) through the high-pressure gas tank (53) until the hydrogenation is completed.

3. The hydrogenation method according to claim 1, characterized in that The inlet of the sequence control disk (30) can be selectively connected to any one of the gas tanks, and the outlet of the sequence control disk (30) is connected to the inlet of the hydrogenation pipeline (10), and the hydrogenation pipeline (10) is provided with a regulating valve (42); When the opening of the regulating valve (42) reaches a maximum value and the value of the real-time flow is less than the value of the initial flow, the sequence control disk (30) is disconnected from the gas tank currently connected, and the sequence control disk (30) is connected to the gas tank with a higher pressure.

4. A hydrogen refueling station, characterized in that: The hydrogenation station applies the hydrogenation method described in any one of claims 1 to 3, and the hydrogenation station includes a control unit, which is electrically connected to the sequential control disk (30), the flow meter (41) on the hydrogenation pipeline (10), and the regulating valve (42). The control unit receives the real-time flow signal detected by the flow meter (41), controls the sequential control disk (30) to be connected to the corresponding gas tank, and controls the valve opening of the regulating valve (42) in real time.

5. The hydrogen refueling station according to claim 4, characterized in that The multiple gas tanks of the hydrogen refueling station include a low-pressure gas tank (51), a medium-pressure gas tank (52) and a high-pressure gas tank (53). The low-pressure gas tank (51), the medium-pressure gas tank (52) and the high-pressure gas tank (53) are each at least two groups. The two groups of low-pressure gas tanks (51) are connected to the sequence control panel (30) in a switchable manner to replenish and supply gas in turn. The two groups of medium-pressure gas tanks (52) are connected to the sequence control panel (30) in a switchable manner to replenish and supply gas in turn. The two groups of high-pressure gas tanks (53) are connected to the sequence control panel (30) in a switchable manner to replenish and supply gas in turn.

6. The hydrogen refueling station according to claim 5, characterized in that The hydrogen refueling station further comprises a compressor unit, which is connected to the low-pressure gas tank (51), the medium-pressure gas tank (52) and the high-pressure gas tank (53) in an on-off manner, and is used to replenish gas to the low-pressure gas tank (51), the medium-pressure gas tank (52) and the high-pressure gas tank (53).

7. The hydrogen refueling station according to claim 6, characterized in that The compressor unit comprises a low-pressure compressor unit (44), a medium-pressure compressor unit (45) and a high-pressure compressor unit (46); the low-pressure compressor unit (44) and the low-pressure gas tank (51) are connectable and disconnectable; the low-pressure compressor unit (44) is used to replenish low-pressure hydrogen to the low-pressure gas tank (51); the medium-pressure compressor unit (45) and the medium-pressure gas tank (52) are connectable and disconnectable; the medium-pressure compressor unit (45) is used to replenish medium-pressure hydrogen to the medium-pressure gas tank (52); the high-pressure compressor unit (46) and the high-pressure gas tank (53) are connectable and disconnectable; the high-pressure compressor unit (46) is used to replenish high-pressure hydrogen to the high-pressure gas tank (53).

8. The hydrogen refueling station according to claim 6, characterized in that The hydrogen refueling station further comprises a fuel cell group (61), wherein the fuel cell group (61) is used to supply power to the cooling unit (43) and / or the compressor unit.

9. The hydrogen refueling station according to claim 4, characterized in that The hydrogenation station further comprises a one-way valve (62) arranged on the hydrogenation pipeline (10), and the one-way valve (62) is used to prevent the hydrogen in the hydrogenation pipeline (10) from flowing back.

10. The hydrogen refueling station according to claim 4, characterized in that: The hydrogenation station further comprises a stop valve (63) arranged on the hydrogenation pipeline (10), and the stop valve (63) is used to control the hydrogen flow in the hydrogenation pipeline (10).

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