Automatic pressure-maintaining replacement hydrogen supply system and hydrogen energy vehicle

Abstract

The invention relates to the technical field of hydrogen energy vehicles, and particularly discloses an automatic pressure-maintaining replacement hydrogen supply system and a hydrogen energy vehicle, and the automatic pressure-maintaining replacement hydrogen supply system comprises a hydrogen cylinder assembly, an inert gas storage assembly and a controller. Under the pressure maintaining working condition, the cylinder valve assembly can be controlled through the controller, so that the hydrogen supply pipeline is disconnected from the hydrogen cylinder body, meanwhile, the controller controls the inert gas storage assembly to be communicated with the hydrogen supply pipeline, inert gas can be input into the hydrogen supply pipeline through the inert gas storage assembly at the moment, and therefore pressure maintaining operation on the hydrogen supply pipeline is achieved; similarly, under the replacement working condition, the cylinder valve assembly can be controlled through the controller, so that the hydrogen supply pipeline is communicated with the hydrogen cylinder body, meanwhile, the controller controls the inert gas storage assembly to be communicated with the hydrogen supply pipeline, inert gas in the hydrogen supply pipeline and the hydrogen cylinder body is sucked in through the inert gas storage assembly at the moment, and recovery of the inert gas is completed; and the time required for replacement and the wasted fuel are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen energy vehicles, and particularly relates to an automatic pressure maintaining and replacement hydrogen supply system and a hydrogen energy vehicle. Background Art

[0002] At present, due to the extremely wide explosion limit of hydrogen and the lack of obvious flame when it burns, it has great danger. Therefore, the existing hydrogen energy vehicles pay great attention to the sealing performance of the hydrogen supply system. Among them, the sealing performance of the hydrogen supply system generally needs to be ensured by using inert gas to complete the pressure maintaining according to the specified process. During the pressure maintaining process, manual operation by the operator is required, which takes a long time. The gas in the pipeline after pressure maintaining needs to be discharged, wasting inert gas. And after the sealing performance is ensured, the inert gas nitrogen in the cylinder (originally carried in the cylinder and filled during pressure maintaining) needs to be replaced. The common replacement method in the related art of the hydrogen supply system is to fill hydrogen in multiple rounds and release this part of hydrogen from the discharge port until the requirements are met. When using this method, the time required for the discharge of high-pressure hydrogen is generally very long, and the hydrogen used for replacement (the price of hydrogen itself is relatively high) needs to be emptied into the air, which not only has a certain safety risk but also causes economic waste. Summary of the Invention

[0003] The purpose of the present invention is to provide an automatic pressure maintaining and replacement hydrogen supply system and a hydrogen energy vehicle to solve the problem that the existing hydrogen supply system requires manual operation by the operator during the pressure maintaining and replacement processes, which takes time and wastes gas.

[0004] On the one hand, the present invention provides an automatic pressure maintaining and replacement hydrogen supply system, which includes: a hydrogen cylinder assembly, including a hydrogen cylinder body, a hydrogen supply pipeline and a cylinder valve assembly. One end of the hydrogen supply pipeline is communicably and disconnectably connected to the air inlet of the hydrogen cylinder body through the cylinder valve assembly, and the other end of the hydrogen supply pipeline can be connected to a hydrogen supply device; an inert gas storage assembly, communicably and disconnectably connected to the hydrogen supply pipeline; a controller, both the cylinder valve assembly and the inert gas storage assembly are communicatively connected to the controller. Among them, the automatic pressure maintaining and replacement hydrogen supply system has a pressure maintaining working condition and a replacement working condition. In the pressure maintaining working condition, the controller controls the cylinder valve assembly to disconnect the hydrogen supply pipeline from the hydrogen cylinder body, and controls the inert gas storage assembly to be connected to the hydrogen supply pipeline, and the inert gas storage assembly inputs inert gas into the hydrogen supply pipeline. In the replacement working condition, the controller controls the cylinder valve assembly to connect the hydrogen supply pipeline to the hydrogen cylinder body, the controller controls the inert gas storage assembly to be connected to the hydrogen supply pipeline, and the inert gas storage assembly inhales the inert gas in the hydrogen supply pipeline and the hydrogen cylinder body.

[0005] As an alternative technical solution of the automatic pressure-holding replacement hydrogen supply system, the bottle valve assembly includes a bottle valve body and a driving member. The bottle valve body is arranged on the hydrogen supply pipeline, and the driving member is drivingly connected to the bottle valve body. The driving member drives the bottle valve body to rotate so as to connect or disconnect the hydrogen supply pipeline from the air inlet of the hydrogen cylinder body.

[0006] As an alternative technical solution of the automatic pressure-holding replacement hydrogen supply system, the driving member includes a driving motor, a clamping member and a connecting shaft. The clamping member is clamped to the bottle valve body, the driving motor is installed on the clamping member, and the output shaft of the driving motor is connected to the bottle valve body through the connecting shaft to drive the bottle valve body to rotate.

[0007] As an alternative technical solution of the automatic pressure-holding replacement hydrogen supply system, the inert gas storage assembly includes a storage tank, a booster pump and a control valve. One end of the booster pump is communicated with the storage tank, and the other end is communicated with the hydrogen supply pipeline. The control valve is arranged on the pipeline connecting the booster pump and the hydrogen supply pipeline, and both the controller and the booster pump are communicatively connected to the control valve.

[0008] As an alternative technical solution of the automatic pressure-holding replacement hydrogen supply system, in the pressure-holding working condition, the controller controls the booster pump to deliver the inert gas in the storage tank to the hydrogen supply pipeline and controls the control valve to connect the storage tank with the hydrogen supply pipeline; in the replacement working condition, the controller controls the booster pump to suck the inert gas in the hydrogen supply pipeline and the hydrogen cylinder body into the storage tank and controls the control valve to connect the storage tank with the hydrogen supply pipeline.

[0009] As an alternative technical solution of the automatic pressure-holding replacement hydrogen supply system, the inert gas storage assembly further includes a pressure sensor arranged between the control valve and the hydrogen supply pipeline. The pressure sensor can detect the pressure of the gas in the hydrogen supply pipeline.

[0010] As an alternative technical solution of the automatic pressure-holding replacement hydrogen supply system, the inert gas storage assembly further includes an evacuation pipeline. The evacuation pipeline is communicatively connected to the storage tank in a switchable manner, and the evacuation pipeline can discharge the inert gas in the storage tank to the atmosphere.

[0011] As an alternative technical solution of the automatic pressure-holding replacement hydrogen supply system, the inert gas storage assembly further includes an evacuation valve. The evacuation valve is arranged on the evacuation pipeline, and the evacuation valve can control the connection or disconnection between the evacuation pipeline and the storage tank.

[0012] As an alternative technical solution of the automatic pressure maintaining and replacement hydrogen supply system, the automatic pressure maintaining and replacement hydrogen supply system further includes a power source, and the inert gas storage component, the bottle valve component, and the controller are all electrically connected to the power source, and the power source can supply power to the inert gas storage component, the bottle valve component, and the controller.

[0013] On the other hand, the present invention provides a hydrogen energy vehicle, including the automatic pressure maintaining and replacement hydrogen supply system in any of the above solutions.

[0014] The beneficial effects of the present invention are as follows:

[0015] The present invention provides an automatic pressure maintaining and replacement hydrogen supply system, which includes a hydrogen cylinder assembly, an inert gas storage component, and a controller. Among them, the hydrogen cylinder assembly includes a hydrogen cylinder body, a hydrogen supply pipeline, and a bottle valve component. By using the automatic pressure maintaining and replacement hydrogen supply system of the present invention, under the pressure maintaining condition, the controller can control the bottle valve component to disconnect the hydrogen supply pipeline from the hydrogen cylinder body. At the same time, the controller controls the inert gas storage component to communicate with the hydrogen supply pipeline. At this time, inert gas can be input into the hydrogen supply pipeline through the inert gas storage component, so as to realize the pressure maintaining operation of the hydrogen supply pipeline; similarly, under the replacement condition, the controller can control the bottle valve component to connect the hydrogen supply pipeline to the hydrogen cylinder body, and at the same time the controller controls the inert gas storage component to communicate with the hydrogen supply pipeline. At this time, the inert gas in the hydrogen supply pipeline and the hydrogen cylinder body is inhaled through the inert gas storage component to complete the recovery of the inert gas, reducing the time required for replacement and the wasted fuel. By using the automatic pressure maintaining and replacement hydrogen supply system of the present invention, during the pressure maintaining condition and the replacement condition, the pressure maintaining condition and the replacement condition of the hydrogen supply system can be quickly switched without manual intervention by the operator, effectively solving the problem that the existing hydrogen supply system needs manual operation by the operator during the pressure maintaining and replacement processes, which is time-consuming and wastes gas. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the automatic pressure maintaining and replacement hydrogen supply system in an embodiment of the present invention;

[0017] Figure 2 It is a schematic structural diagram of the inert gas storage component in an embodiment of the present invention;

[0018] Figure 3 It is a schematic structural diagram of the bottle valve component in an embodiment of the present invention.

[0019] In the figure:

[0020] 1. Hydrogen cylinder assembly; 11. Hydrogen cylinder body; 12. Hydrogen supply pipeline; 13. Bottle valve component; 131. Driving member; 1311. Driving motor; 1312. Clamping member; 1313. Connecting shaft;

[0021] 2. Inert gas storage component; 21. Storage tank; 22. Booster pump; 23. Drainage pipeline; 24. Drainage valve;

[0022] 3. Controller. Detailed implementation manners

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0025] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0026] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and cannot be construed as a limitation of the present invention.

[0027] As Figures 1 to 3As shown in the figure, this embodiment provides an automatic pressure-holding and replacement hydrogen supply system, which includes a hydrogen cylinder assembly 1, an inert gas storage assembly 2, and a controller 3. Among them, the hydrogen cylinder assembly 1 includes a hydrogen cylinder main body 11, a hydrogen supply pipeline 12, and a cylinder valve assembly 13. One end of the hydrogen supply pipeline 12 is communicably connected to the air inlet of the hydrogen cylinder main body 11 through the cylinder valve assembly 13 in a switchable manner, and the other end of the hydrogen supply pipeline 12 can be connected to a hydrogen supply device; the inert gas storage assembly 2 is communicably connected to the hydrogen supply pipeline 12 in a switchable manner; both the cylinder valve assembly 13 and the inert gas storage assembly 2 are communicatively connected to the controller 3; among them, the automatic pressure-holding and replacement hydrogen supply system has a pressure-holding working condition and a replacement working condition. In the pressure-holding working condition, the controller 3 controls the cylinder valve assembly 13 to disconnect the hydrogen supply pipeline 12 from the hydrogen cylinder main body 11, and controls the inert gas storage assembly 2 to be connected to the hydrogen supply pipeline 12, and the inert gas storage assembly 2 inputs inert gas into the hydrogen supply pipeline 12; in the replacement working condition, the controller 3 controls the cylinder valve assembly 13 to connect the hydrogen supply pipeline 12 to the hydrogen cylinder main body 11, and the controller 3 controls the inert gas storage assembly 2 to be connected to the hydrogen supply pipeline 12, and the inert gas storage assembly 2 inhales the inert gas in the hydrogen supply pipeline 12 and the hydrogen cylinder main body 11.

[0028] By using the automatic pressure-holding and replacement hydrogen supply system of the present invention, in the pressure-holding working condition, the controller 3 can be used to control the cylinder valve assembly 13 to disconnect the hydrogen supply pipeline 12 from the hydrogen cylinder main body 11. At the same time, the controller 3 controls the inert gas storage assembly 2 to be connected to the hydrogen supply pipeline 12. At this time, the inert gas storage assembly 2 can input inert gas into the hydrogen supply pipeline 12, thereby realizing the pressure-holding operation of the hydrogen supply pipeline 12; similarly, in the replacement working condition, the controller 3 can be used to control the cylinder valve assembly 13 to connect the hydrogen supply pipeline 12 to the hydrogen cylinder main body 11, and at the same time the controller 3 controls the inert gas storage assembly 2 to be connected to the hydrogen supply pipeline 12. At this time, the inert gas storage assembly 2 inhales the inert gas in the hydrogen supply pipeline 12 and the hydrogen cylinder main body 11 to complete the recovery of the inert gas, reducing the time required for replacement and the wasted fuel. By using the automatic pressure-holding and replacement hydrogen supply system of the present invention, during the pressure-holding and replacement working conditions, the rapid switching between the pressure-holding working condition and the replacement working condition of the hydrogen supply system can be realized without manual intervention by the operator, effectively solving the problems that the existing hydrogen supply system requires manual operation by the operator during the pressure-holding and replacement processes, consuming time and wasting gas.

[0029] In some embodiments, the cylinder valve assembly 13 includes a cylinder valve main body and a driving member 131. Among them, the cylinder valve main body is arranged on the hydrogen supply pipeline 12, and the driving member 131 is drivingly connected to the cylinder valve main body. The driving member 131 can drive the cylinder valve main body to rotate, so that the hydrogen supply pipeline 12 is connected to or disconnected from the air inlet of the hydrogen cylinder main body 11, that is, it is not necessary for the operator to manually operate to connect or disconnect the hydrogen supply pipeline 12 from the air inlet of the hydrogen cylinder main body 11, improving the intelligent level of the automatic pressure-holding and replacement hydrogen supply system.

[0030] In this embodiment, as Figure 3 shown, the driving member 131 includes a driving motor 1311, a clamping member 1312, and a connecting shaft 1313. Among them, the clamping member 1312 is clamped to the valve body of the bottle valve, and the driving motor 1311 is installed on the clamping member 1312, so that the driving motor 1311 can be fixed. At the same time, the output shaft of the driving motor 1311 is connected to the valve body of the bottle valve through the connecting shaft 1313, so as to achieve the purpose of driving the valve body of the bottle valve to rotate. It should be noted that the opening and closing of the valve body of the bottle valve are realized by the forward and reverse rotation of the driving motor 1311.

[0031] Optionally, the shape of the clamping member 1312 is circular, which can be adapted to the shape of the valve body of the bottle valve and can be sleeved and clamped on the valve body of the bottle valve.

[0032] In some embodiments, the inert gas storage assembly 2 includes a storage tank 21, a booster pump 22, and a control valve. One end of the booster pump 22 is communicated with the storage tank 21, and the other end is communicated with the hydrogen supply pipeline 12. The control valve is arranged on the pipeline connecting the booster pump 22 and the hydrogen supply pipeline 12. Moreover, the controller 3 and the booster pump 22 are both communicatively connected to the control valve, so that the controller 3 can control the connection or disconnection between the booster pump 22 and the hydrogen supply pipeline 12.

[0033] Optionally, the control valve includes, but is not limited to, a solenoid valve, etc.

[0034] Furthermore, in the pressure maintaining condition, the controller 3 is used to control the booster pump 22 to convey the inert gas in the storage tank 21 to the hydrogen supply pipeline 12, and the controller 3 controls the control valve to connect the storage tank 21 and the hydrogen supply pipeline 12; similarly, in the replacement condition, the controller 3 controls the booster pump 22 to suck the inert gas in the hydrogen supply pipeline 12 and the hydrogen bottle body 11 into the storage tank 21, and controls the control valve to connect the storage tank 21 and the hydrogen supply pipeline 12. With such a setting, the rapid switching between the pressure maintaining condition and the replacement condition can be realized, effectively solving the problem that the hydrogen supply system in the prior art needs manual operation by the operator during the pressure maintaining and replacement processes, which is time-consuming and wasteful of gas.

[0035] In some embodiments, the inert gas storage assembly 2 further includes a pressure sensor arranged between the control valve and the hydrogen supply pipeline 12. The pressure of the gas in the hydrogen supply pipeline 12 can be detected through the pressure sensor.

[0036] In this embodiment, the inert gas storage assembly 2 further includes an evacuation pipeline 23. Among them, the evacuation pipeline 23 is communicatively connected to the storage tank 21 in a switchable manner, and the inert gas in the storage tank 21 can be discharged to the atmosphere by using the evacuation pipeline 23.

[0037] Further, in order to realize the on-off connection between the evacuation pipeline 23 and the storage tank 21, the inert gas storage assembly 2 further includes an evacuation valve 24. The evacuation valve 24 is arranged on the evacuation pipeline 23, and the connection or disconnection between the evacuation pipeline 23 and the storage tank 21 can be controlled through the evacuation valve 24.

[0038] In some embodiments, the automatic pressure-maintaining and replacement hydrogen supply system further includes a power source. Among them, the inert gas storage assembly 2, the bottle valve assembly 13, and the controller 3 are all electrically connected to the power source. The power source can be used to supply power to the inert gas storage assembly 2, the bottle valve assembly 13, and the controller 3. In this way, a series of operations can be realized without using the power source of the whole vehicle, without manual intervention, and the rapid pressure-maintaining and replacement of the hydrogen supply system can be realized.

[0039] This embodiment also provides a hydrogen energy vehicle, including the automatic pressure-maintaining and replacement hydrogen supply system in the above solution. By using the hydrogen energy vehicle of the present invention, in the pressure-maintaining working condition, the controller 3 can be used to control the bottle valve assembly 13 to disconnect the hydrogen supply pipeline 12 from the hydrogen bottle body 11. At the same time, the controller 3 controls the inert gas storage assembly 2 to be connected to the hydrogen supply pipeline 12. At this time, inert gas can be input into the hydrogen supply pipeline 12 through the inert gas storage assembly 2, so as to realize the pressure-maintaining operation of the hydrogen supply pipeline 12. Similarly, in the replacement working condition, the controller 3 can be used to control the bottle valve assembly 13 to connect the hydrogen supply pipeline 12 to the hydrogen bottle body 11, and at the same time the controller 3 controls the inert gas storage assembly 2 to be connected to the hydrogen supply pipeline 12. At this time, the inert gas in the hydrogen supply pipeline 12 and the hydrogen bottle body 11 is inhaled through the inert gas storage assembly 2 to complete the recovery of the inert gas, reducing the time required for replacement and the wasted fuel. By using the hydrogen energy vehicle of the present invention, during the pressure-maintaining and replacement working conditions, the operator does not need to manually intervene, and the rapid switching between the pressure-maintaining working condition and the replacement working condition of the hydrogen supply system can be realized, effectively solving the problem that the existing hydrogen supply system needs manual operation by the operator during the pressure-maintaining and replacement processes, which is time-consuming and wastes gas.

[0040] The working process of the present invention is as follows:

[0041] In the pressure-maintaining working condition: After confirming that the hydrogen supply pipeline is connected, connect the booster pump, control valve, drive motor, controller, evacuation valve to the power source, and turn on the power switch. Then the corresponding working mode can be selected. After selecting the pressure-maintaining working condition, the controller will send an instruction to the drive motor, and the drive motor will rotate forward to synchronously close all the bottle valve bodies. When a certain force is reached, it is determined to be closed, and the drive motor stops rotating. Subsequently, the storage tank and the hydrogen supply pipeline are connected, and the booster pump starts to work forward to inject the inert gas in the storage tank into the hydrogen supply pipeline. A pressure sensor is installed on the hydrogen supply pipeline, and the pressure value will be displayed in real time on the controller. When the pressure reaches the required set value, the connection between the storage tank and the hydrogen supply pipeline is disconnected, and the timer starts timing synchronously. When the pressure-maintaining reaches the time, the controller will display the real-time pressure and the pressure-maintaining result.

[0042] After the holding pressure condition passes, the displacement condition is selected. The controller will send an instruction to the drive motor, and the drive motor rotates in the reverse direction to synchronously open all the bottle valve bodies. When a certain force is reached, it is determined to close, and the drive motor stops rotating. Subsequently, the storage tank and the hydrogen supply pipeline are connected, and the booster pump works in the reverse direction to inject the inert gas in the hydrogen supply pipeline and the hydrogen cylinder body into the storage tank in the reverse direction. When the pressure in the storage tank reaches the set value, the evacuation valve opens to quickly discharge the inert gas in the storage tank, making the entire automatic pressure-holding displacement hydrogen supply system in a negative pressure, thereby reducing the time required for displacement and the wasted hydrogen fuel.

[0043] After completing this operation, turn off the power switch to disconnect the booster pump, control valve, drive motor, controller, and evacuation valve from the power supply. When the entire automatic pressure-holding displacement hydrogen supply system works normally and needs to perform pressure-holding displacement again, the above operation can be repeated.

[0044] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. An automatic pressure-maintaining replacement hydrogen supply system, characterized in that Comprising: A hydrogen cylinder assembly (1), including a hydrogen cylinder main body (11), a hydrogen supply pipeline (12) and a cylinder valve assembly (13). One end of the hydrogen supply pipeline (12) is communicably and disconnectably connected to the air inlet of the hydrogen cylinder main body (11) through the cylinder valve assembly (13), and the other end of the hydrogen supply pipeline (12) can be connected to a hydrogen supply device; An inert gas storage assembly (2), communicably and disconnectably connected to the hydrogen supply pipeline (12); A controller (3), and both the cylinder valve assembly (13) and the inert gas storage assembly (2) are communicatively connected to the controller (3); Wherein, the automatic pressure maintaining and replacement hydrogen supply system has a pressure maintaining condition and a replacement condition. In the pressure maintaining condition, the controller (3) controls the cylinder valve assembly (13) to disconnect the hydrogen supply pipeline (12) from the hydrogen cylinder main body (11), and controls the inert gas storage assembly (2) to be connected to the hydrogen supply pipeline (12), and the inert gas storage assembly (2) inputs inert gas into the hydrogen supply pipeline (12); in the replacement condition, the controller (3) controls the cylinder valve assembly (13) to connect the hydrogen supply pipeline (12) to the hydrogen cylinder main body (11), the controller (3) controls the inert gas storage assembly (2) to be connected to the hydrogen supply pipeline (12), and the inert gas storage assembly (2) inhales the inert gas in the hydrogen supply pipeline (12) and the hydrogen cylinder main body (11).

2. The automatic pressure-maintaining replacement hydrogen supply system according to claim 1, wherein The cylinder valve assembly (13) includes a cylinder valve main body and a driving member (131). The cylinder valve main body is arranged on the hydrogen supply pipeline (12), the driving member (131) is drivingly connected to the cylinder valve main body, and the driving member (131) drives the cylinder valve main body to rotate, so that the hydrogen supply pipeline (12) is connected to or disconnected from the air inlet of the hydrogen cylinder main body (11).

3. The automatic pressure-maintaining replacement hydrogen supply system according to claim 2, wherein, The driving member (131) includes a driving motor (1311), a clamping member (1312) and a connecting shaft (1313). The clamping member (1312) is clamped to the cylinder valve main body, the driving motor (1311) is installed on the clamping member (1312), and the output shaft of the driving motor (1311) is connected to the cylinder valve main body through the connecting shaft (1313) to drive the cylinder valve main body to rotate.

4. The automatic pressure-maintaining replacement hydrogen supply system according to claim 1, wherein, The inert gas storage assembly (2) includes a storage tank (21), a booster pump (22) and a control valve. One end of the booster pump (22) is connected to the storage tank (21), the other end is connected to the hydrogen supply pipeline (12), the control valve is arranged on the pipeline connecting the booster pump (22) and the hydrogen supply pipeline (12), and both the controller (3) and the booster pump (22) are communicatively connected to the control valve.

5. The automatic pressure-maintaining replacement hydrogen supply system according to claim 4, wherein In the pressure-holding working condition, the controller (3) controls the booster pump (22) to convey the inert gas in the storage tank (21) to the hydrogen supply pipeline (12), and controls the control valve to connect the storage tank (21) with the hydrogen supply pipeline (12); in the replacement working condition, the controller (3) controls the booster pump (22) to suck the inert gas in the hydrogen supply pipeline (12) and the hydrogen cylinder body (11) into the storage tank (21), and controls the control valve to connect the storage tank (21) with the hydrogen supply pipeline (12).

6. The automatic pressure-maintaining replacement hydrogen supply system according to claim 4, wherein The inert gas storage assembly (2) further includes a pressure sensor disposed between the control valve and the hydrogen supply pipeline (12), and the pressure sensor can detect the gas pressure in the hydrogen supply pipeline (12).

7. The automatic pressure-maintaining replacement hydrogen supply system according to claim 4, wherein The inert gas storage assembly (2) further includes an evacuation pipeline (23), the evacuation pipeline (23) is communicatively connected to the storage tank (21) in a switchable manner, and the evacuation pipeline (23) can discharge the inert gas in the storage tank (21) to the atmosphere.

8. The automatic pressure-maintaining replacement hydrogen supply system according to claim 7, wherein The inert gas storage assembly (2) further includes an evacuation valve (24), the evacuation valve (24) is disposed on the evacuation pipeline (23), and the evacuation valve (24) can control the connection or disconnection between the evacuation pipeline (23) and the storage tank (21).

9. The automatic pressure-maintaining replacement hydrogen supply system according to any one of claims 1-8, characterized in that, The automatic pressure-holding replacement hydrogen supply system further includes a power source, the inert gas storage assembly (2), the bottle valve assembly (13), and the controller (3) are all electrically connected to the power source, and the power source can supply power to the inert gas storage assembly (2), the bottle valve assembly (13), and the controller (3).

10. A hydrogen energy vehicle, characterized in that, An automatic pressure-holding replacement hydrogen supply system according to any one of claims 1-9 is included.

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