CN112879802A

CN112879802A - Hydrogen storage device combination valve for moving object and control method thereof

Info

Publication number: CN112879802A
Application number: CN202110281391.9A
Authority: CN
Inventors: 孙继胜; 岑健; 周婵鸣; 钱程; 仄伟杰
Original assignee: Youon Technology Co Ltd
Current assignee: Youon Technology Co Ltd
Priority date: 2021-03-16
Filing date: 2021-03-16
Publication date: 2021-06-01

Abstract

The invention discloses a hydrogen storage device combination valve for moving objects and a control method thereof, belonging to the field of energy equipment. The combination valve includes: a valve body; the connecting port is communicated with the gas outlet of the hydrogen storage bottle and transmits hydrogen into the valve body; the air vent is communicated with the connecting port, receives hydrogen and transmits the hydrogen to the hydrogen storage bottle and/or transmits the hydrogen to the galvanic pile; a control valve provided at a connection point between the vent port and the connection port, for controlling opening and closing of the connection port and the vent port passage; the safety valve is communicated with the connecting port to ensure that the internal pressure of the hydrogen storage bottle is controlled within a low pressure range of 1-3 MPa; and the pressure regulating valve is arranged on a passage between the connecting port and the vent and is used for controlling the air pressure in the valve body. According to the invention, the sealing joint is connected with the gas outlet, so that when the hydrogen storage device is transported and replaced, the first joint is in an open circuit state, the gas outlet of the combination valve is automatically closed, the gas tightness of the combination valve is improved, the hydrogen leakage is further reduced, and the hydrogen storage device is rapidly and conveniently replaced.

Description

Hydrogen storage device combination valve for moving object and control method thereof

Technical Field

The invention belongs to the field of energy equipment, and particularly relates to a hydrogen storage device combination valve for moving objects and a control method thereof.

Background

It is quite common to use a hydrogen storage tank as a storage device for hydrogen gas, and hydrogen gas is required to be supplied to any hydrogen fuel cell system or other products using a hydrogen fuel cell. The existing hydrogen storage technology can be mainly divided into three types, namely high-pressure gas, liquid hydrogen and hydrogen storage alloy, wherein the high-pressure gas has high energy, weight and density, but has large volume and poor safety. Although the energy, weight and density of the liquid hydrogen storage mode are higher, the liquefied energy consumption is large, and meanwhile, a heat insulation storage tank is required to be used, so that the liquid hydrogen storage mode is generally suitable for large storage tanks; the energy, weight and density of the hydrogen storage mode of the hydrogen storage alloy can meet the basic use requirement, but the safety is higher.

The gas outlet of the combined valve of the hydrogen storage device for moving objects is generally connected with a pipeline and used for gas supply of the galvanic pile, so that potential safety hazards exist when the hydrogen storage bottle is replaced, the later maintenance cost is high, and after the hydrogen storage bottle is replaced for many times, the gas tightness of the pipeline is reduced linearly, and even the normal hydrogen supply of the galvanic pile can be influenced. Therefore, it is necessary to design a hydrogen storage device combination valve for moving objects, which can rapidly and conveniently replace the hydrogen storage device.

Disclosure of Invention

An object of the present invention is to provide a hydrogen storage container combination valve for a mobile object and a control method thereof to solve the problems involved in the background art.

The technical scheme of the invention comprises two aspects. In one aspect, the present invention provides a hydrogen storage combination valve for a mobile object, the combination valve being a multifunctional integrated valve;

the combination valve includes:

a valve body;

the connecting port is communicated with the gas outlet of the hydrogen storage bottle and transmits hydrogen into the valve body;

the air vent is communicated with the connecting port, receives hydrogen and transmits the hydrogen to the hydrogen storage bottle and/or transmits the hydrogen to the galvanic pile;

a control valve provided at a connection point between the vent port and the connection port, for controlling opening and closing of the connection port and the vent passage;

the safety valve is communicated with the connecting port to ensure that the internal pressure of the bottle body is controlled within a low pressure range of 1-3 MPa;

and the pressure regulating valve is arranged on a passage between the connecting port and the vent and is used for controlling the air pressure in the valve body.

Preferably or optionally, a sealing joint is connected to the vent;

the sealing joint comprises: the first joint is connected with the air vent, and the second joint is connected with a gas supply pipeline of the galvanic pile;

when the first connector and the second connector are in a disconnected state, the first connector has a current-cut function and forms an open circuit;

when the second connector is plugged into the first connector, a passage is formed, and hydrogen is provided for the pile gas supply pipeline through the pipeline.

Preferably or optionally, the combination valve is of unitary construction.

Preferably or optionally, the combination valve is mounted at a vent port of the hydrogen storage cylinder; the combination valve and the hydrogen storage bottle are connected integrally.

Preferably or optionally, the valve body is made of an aluminum alloy, a titanium alloy or metallic copper.

Preferably or optionally, one end of the connecting port is provided with a pressure sensor, and the safety valve is provided with an automatic trigger device for starting the safety valve.

Preferably or optionally, the first joint comprises: the first body part is connected with the vent in a sealing mode, the second body part is connected with the second connector in a sealing mode, a sealing air nozzle is arranged in the second body part, and an elastic piece is arranged outside the sealing air nozzle;

the elastic piece is in an energy storage state, so that the sealing air tap has a tendency of keeping closed.

Preferably or optionally, the second joint comprises: a third body portion sealingly connected to the second body portion; the fourth body part is connected with the electric pile air supply pipeline in a sealing mode, a top column is arranged inside the third body part, and the top column is a hollow pipeline;

when the second connector is inserted into the first connector, the jacking column jacks up the sealing air nozzle to force the sealing air nozzle to open to form a passage, and hydrogen is provided for the electric pile air supply pipeline through the hollow pipeline.

Preferably or optionally, the first joint and the second joint are connected by a snap or a fastener.

In another aspect, the present invention also provides a control method of a hydrogen storage apparatus composite valve for a mobile object, comprising the steps of:

in the process of inflation, adjusting a control valve to communicate the vent hole and the connecting port, then externally connecting a negative pressure device on the vent hole, vacuumizing the hydrogen storage bottle, and activating the solid hydrogen storage material in the hydrogen storage bottle; then adjusting the control valve to communicate the air vent and the connecting port, and then externally connecting hydrogen equipment on the air vent to realize hydrogen charging;

in the air outlet process, the second connector is connected with the first connector, then the control valve is adjusted to communicate the air vent with the connecting port, and then the air vent is externally connected with a galvanic pile air supply pipeline to realize air supply to the galvanic pile;

in the pressure relief process, the detection pressure of the pressure sensor is greater than a pressure threshold value, the safety valve is automatically triggered to be opened, the safety valve is communicated with the connecting port, and automatic pressure relief is achieved.

The invention relates to a hydrogen storage device combination valve for moving objects and a control method thereof, compared with the prior art, the hydrogen storage device combination valve has the following beneficial effects:

1. through making up a plurality of functional valve and designing into the combination valve, the design structure of combination valve is reasonable, the integrated level is high, the security performance is good, long service life. The pipeline arrangement of the hydrogen fuel electric bicycle is further simplified, the possibility of mutual staggered winding between pipelines is reduced, and the difficulty of later maintenance is reduced.

2. Through connecting sealing joint at the blow vent, when transportation, change hydrogen storage device, first joint is in the state of opening a circuit, and the blow vent of self-sealing combination valve has improved the gas tightness of combination valve, further reduces hydrogen and reveals the volume, and hydrogen storage device is convenient changed fast.

3. Through the sealed air cock of design to set up the elastic component in sealed air cock outside, the elastic component energy storage makes sealed air cock has the trend of keeping closed, improves the seal of sealed air cock when the disconnection.

4. With elastic component cross sectional shape design for "W", on the one hand, the elastic component energy storage makes sealed air cock has the trend that keeps closed and can take place certain deformation, works as the elastic component takes place deformation, the elastic component can also play the effect of sealing washer, especially when the elastic component takes place deformation, can strengthen sealed effect greatly.

5. Two annular lips are arranged on the outer surfaces of the first body part and the third body part, a sealing cavity is formed, and the sealing performance of the first joint, the vent, the second joint and the first joint is improved.

6. A buckle or a fastener is arranged between the first joint and the second joint and used for offsetting a backward acting force of the sealing air tap on the ejection column, and the connection stability and the sealing property of the first joint and the second joint are ensured.

7. The inner side of the second body part is provided with a groove with a triangular cross section, and the outer edge of the third body part is provided with an embedded body matched with the recess. The insert body is fitted in the groove, so that the sealing performance of the connection between the second joint and the first joint is improved.

8. The combined valve has the advantages that the valve body, the filtering assembly, the pressure regulating valve assembly, the filling valve assembly and the stop valve assembly are integrated, so that the valve assembly is high in integration level, reasonable and compact in structure and light in weight, the system quality hydrogen storage rate of the valve assembly is improved, and the gas leakage risk is reduced.

Drawings

FIG. 1 is a schematic view of a prior art hydrogen storage device and its wiring structure.

Fig. 2 is a schematic sectional view of a hydrogen storage container according to the present invention at a gas outlet.

Fig. 3 is a schematic view of the structure of the combination valve of the present invention.

Fig. 4 is a schematic view of the connection of the combination valve of the present invention.

Fig. 5 is a schematic connection diagram of a combination valve according to a preferred embodiment of the present invention.

Fig. 6 is a schematic view of the structure of the sealing joint of the present invention.

Fig. 7 is a partially enlarged view of the elastic member of the present invention.

The reference signs are:

the combination valve 100, the hydrogen storage bottle 200, the galvanic pile 300 and the functional valve 400;

a connecting port 111, an inflation port 112, a safety valve 113, a pressure regulating valve 114, an air outlet 115, a control valve 116 and a valve body 117;

the first connector 120, the first body 121, the second body 122, the sealing air tap 123, the elastic element 124, the first lip 125, the second lip 126, the first sealing cavity 127, and the groove 128; a fixing portion 123a, a bent portion 123b, and a sealing portion 123 c;

a second connector 130, a third body 131, a fourth body 132, a top post 133, a third lip 134, a fourth lip 135, a second sealed cavity 136, and an insert 137;

annular groove 141, retaining member 142, raised point 143, retaining member 144.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.

In the present invention, the mobile object mainly refers to various mobile objects that travel on the road surface using a fuel cell as a power system, including but not limited to vehicles, airplanes, ships and other mobile objects. Referring to fig. 1, a hydrogen storage device and a wiring structure thereof in the prior art are shown; various functional valves 400 are as independent main part among the prior art, and one end is connected with hydrogen storage bottle 200 through the pipeline, and the other end passes through the multi-stage pressure reducing valve of tube coupling, then is connected with galvanic pile 300, realizes hydrogen storage bottle 200's hydrogen filling, decompression and play hydrogen, galvanic pile 300's hydrogen supply, leads to hydrogen fuel electric bicycle's pipeline complicacy from this, and crisscross winding each other increases the later maintenance degree of difficulty.

Based on the above engineering scenario, in order to simplify the pipeline layout and improve the structural rationality of the hydrogen fuel electric bicycle, referring to fig. 2 to 3, the present invention provides a hydrogen storage device combination valve 100 for moving objects, wherein the combination valve 100 is a multifunctional integrated valve; the combination valve 100 includes: a valve body 117, a connecting port 111, an inflation port 112, an air outlet 115, a control valve 116, a safety valve 113 and a pressure regulating valve 114; wherein, the connection port 111 is communicated with the bottle body to transmit hydrogen into the valve body 117; the inflation inlet 112 is communicated with the connection port 111, and receives hydrogen in a single direction and transmits the hydrogen to the connection port 111; the gas outlet 115 is communicated with the connecting port 111, receives hydrogen, is connected to a stack 300, and provides 15-65kpa of hydrogen to the stack 300, it should be noted that, for those skilled in the art, the gas charging port 112 and the gas outlet 115 can be combined into one to form a gas vent without affecting the function realization; the control valve 116 is arranged at the connection point of the inflation inlet 112, the air outlet 115 and the connection port 111, and controls the opening and closing of the passages of the connection port 111 and the inflation inlet 112 and the passages of the connection port 111 and the air outlet 115; the safety valve 113 is communicated with the connecting port 111 to ensure that the internal pressure of the bottle body is controlled within a low pressure range of 1-3 MPa; a pressure regulating valve 114 is provided in a passage between the connection port 111 and the outlet port 115 to control the air pressure in the valve body 117. Through combining a plurality of functional valves 400 and designing into combination valve 100, combination valve 100's design structure is reasonable, the integrated level is high, the security performance is good, long service life. The pipeline arrangement of the hydrogen fuel electric bicycle is further simplified, the possibility of mutual staggered winding between pipelines is reduced, and the difficulty of later maintenance is reduced.

In a further embodiment, referring to fig. 4, a two-way valve is provided at the connection port 111; a pressure retaining valve or a one-way valve is arranged on the gas outlet 115, and when the pressure in the hydrogen storage bottle is greater than the external pressure, the gas outlet 115 is in a passage state; the gas charging port 112 is provided with a one-way valve, when the gas charging port 112 is connected with an external gas source, only the external gas source can flow to the hydrogen storage bottle in a one-way manner, but the hydrogen storage bottle cannot flow in a reverse direction, so that the gas tightness of the combination valve 100 is ensured.

In a further embodiment, the inflation port 112 and the air outlet 115 are combined into a whole to form an air vent, and a two-way valve is arranged on a channel between the air vent and the connection port 111, and ensures one-way circulation of hydrogen from the air vent to the connection port 111 during inflation; during the air outlet process, the two-way valve ensures that hydrogen flows from the connecting port 111 to the air vent in one way. Or, referring to fig. 5, two vent pipelines are arranged between the vent and the connection port 111, and two check valves are respectively arranged on the two vent pipelines, one check valve ensures that air is supplied to the galvanic pile, and the other check valve ensures that air is inflated into the bottle body. Through designing the vent line in the valve body, reduce the external connection interface of combination valve, make the integrated level of valve body high, compact structure is reasonable, light in weight, reduce the risk of gas leakage.

In a further embodiment, referring to fig. 6 to 7, a sealing joint is connected to the outlet of the outlet 115; the sealing joint has a flow stopping function and comprises a first joint 120 and a second joint 130; the first joint 120 is connected to the gas outlet 115, and the second joint 130 is connected to the stack 300 through a pipeline, so as to supply gas to the stack 300. When the first connector 120 and the second connector 130 are in a disconnected state, the first connector 120 has a shutoff function, so that an open circuit is formed, and hydrogen leakage is avoided; when the second connector 130 is inserted into the first connector 120, a passage is formed and connected to the stack 300 through a pipe to supply hydrogen to the stack 300; by connecting the valve port of the gas outlet 115 with the sealing joint, when the hydrogen storage device is transported and replaced, the first joint 120 is in an open circuit state, and automatically closes the gas outlet of the combination valve 100, so that the gas tightness of the combination valve 100 is improved, the hydrogen leakage amount is further reduced, and the hydrogen storage device is rapidly and conveniently replaced.

In a further embodiment, the combination valve 100 is a one-piece structure with better sealing and structural stability. And the combination valve 100 is installed at the gas outlet of the hydrogen storage bottle; the combination valve 100 and the hydrogen storage bottle are connected integrally, not connected by a pipeline or a line, and are directly produced and installed integrally by a factory according to design requirements, and the connection structure includes but is not limited to fixed connection modes such as threaded fit, clamping fit, welding and the like, so that the hydrogen storage bottle and the combination valve 100 form a closed cavity. Solid hydrogen storage materials are stored in the closed cavity, and after the solid hydrogen storage materials are heated, hydrogen pressure of 15-50kpa is provided for the galvanic pile 300 through the combination valve 100, so that when the hydrogen storage bottle is not used, the internal pressure of the hydrogen storage bottle is small (low-pressure hydrogen storage in a general sense), and harm to users can not be caused.

In further embodiments, the valve body 117 is made of an aluminum alloy, a titanium alloy, or metallic copper. Since the valve body 117 needs to be exposed to hydrogen for a long time, which causes the corresponding plasticity reduction phenomenon of the valve body 117 and generates hydrogen-induced brittle fracture behavior, in order to improve the hydrogen embrittlement resistance of the valve body 117, it is preferable that the valve body 117 is made of aluminum alloy 6061 or aluminum alloy 6061 is used as a protective layer for preparing the valve body 117, and at least covers the inner surface of the valve body 117, so as to improve the service life of the valve body 117.

In a further embodiment, one end of the connection port 111 is provided with a pressure sensor for detecting pressure changes within the bottle. And an automatic trigger device is installed on the safety valve 113 for starting the safety valve 113. The automatic trigger device comprises a pressure comparison circuit and a valve control circuit. Specifically, the pressure comparison circuit is electrically connected to the pressure sensor, and the pressure threshold (which may be a specific value or a data range) is stored in the pressure comparison circuit, and the pressure comparison circuit receives a pressure signal and compares the current atmospheric pressure with the pressure threshold; the valve control circuit is electrically connected with the pressure comparison circuit and the safety valve 113, and the comparison result of the pressure comparison circuit, such as the currently monitored pressure is greater than the pressure threshold, the current pressure is equal to the pressure threshold, the current pressure is less than the pressure threshold, etc., is sent to the valve control circuit, and different instructions are generated based on different comparison results, for example, when the current pressure is greater than the pressure threshold or the current pressure is equal to the pressure threshold, indicating that the pressure in the hydrogen storage bottle is too large, the activation instruction is generated, and the safety valve 113 is automatically opened.

The connection port 111 includes: an execution unit which has the functions of air inlet stopping and circulation, and a filtering unit which is arranged in the air inlet end of the connecting port 111; the pressure sensor is positioned between the filter unit and the actuating element, and the solid hydrogen storage material is isolated outside the air inlet end by the filter unit, so that the phenomenon that the solid hydrogen storage material adsorbs the outer surface of the pressure sensor due to electrostatic action is avoided, the interference of the solid hydrogen storage material on the detection precision of the pressure sensor is reduced, and the service life of the pressure sensor is prolonged.

In a further embodiment, the first joint 120 comprises: a first body 121 hermetically connected to the outlet of the air outlet 115, a second body 122 hermetically connected to the second joint 130, a sealing nozzle 123 disposed in the second body 122, and an elastic member 124 disposed outside the sealing nozzle 123; the sealing nozzle 123 tends to remain closed due to the energy stored in the elastic member 124.

Specifically, an annular first lip 125 and an annular second lip 126 are disposed on an outer surface of the first body portion 121, a predetermined gap is left between the first lip 125 and the second lip 126, when the first body portion 121 is plugged into the air outlet of the air outlet 115, since the first lip 125, the second lip 126 and the air outlet of the air outlet 115 are in transition fit, a cavity, that is, a first seal cavity 127 is formed between the first lip 125 and the second lip 126. The first lip 125, the second lip 126 and the air outlet of the air outlet 115 are in transition fit, and the first seal cavity 127 is used to realize the sealed connection between the air outlet of the air outlet 115 and the first body 121.

The illustrated sealing air cap 123 includes: a fixing portion 123a fixedly connected to the second body portion 122, a bending portion 123b connected to the fixing portion 123a and inclined along a central axis of the first joint 120, and a sealing portion 123c connected to the bending portion 123 b; and the sealing air tap 123 is an integrally formed structure. In addition, an annular elastic member 124 is disposed between the sealing portion 123c and the first body portion 121, and the position of the elastic member 124 is limited between the sealing portion 123c and the first body portion 121, and may be fixed or fixed by a limiting member 144

The fixing is performed to ensure that the position of the elastic member 124 does not slide relatively, and the sealing air tap 123 has a tendency to remain closed due to the energy stored by the elastic member 124. In the present invention, the elastic member 124 has a cross-sectional shape of "W", and one end thereof abuts against the first body portion 121 and the other end thereof abuts against the sealing portion 123 c. On the one hand, the elastic member 124 stores energy, so that the sealing nozzle 123 has a tendency of being kept closed and can deform to some extent, and on the other hand, when the elastic member 124 deforms, because the outer surface of the elastic member 124 is coated with a layer of flexible protection material, the elastic member 124 can also function as a sealing ring, and particularly when the elastic member 124 deforms, the sealing effect can be greatly enhanced.

In a further embodiment, the second joint 130 comprises: a third body portion 131 for sealing connection with the second body portion 122; a fourth body part 132 hermetically connected to the stack gas supply line, a top pillar 133 disposed inside the third body part 131 and protruding outward, and in clearance fit with the fixing part 123a, wherein the top pillar 133 is a hollow pipe; when the second connector 130 is inserted into the first connector 120, the top pillar 133 jacks up the sealing air nozzle 123, so that the sealing air nozzle 123 is forced to open, a passage is formed, and hydrogen is provided to the stack gas supply pipeline through the hollow pipeline.

Similarly, an annular third lip 134 and an annular fourth lip 135 are disposed on the outer surface of the third body 131, a predetermined gap is left between the third lip 134 and the fourth lip 135, when the third body 131 is plugged into the first connector 120, since the third lip 134 and the fourth lip 135 are in transition fit with the inner surface of the second body 122, and a cavity, that is, a second sealed cavity 136 is formed between the third lip 134 and the fourth lip 135. In addition, a groove 128 having a triangular cross-sectional shape is formed inside the second body 122, and an insertion body 137 which is engaged with the recess is formed at an outer edge of the third body. By fitting the insert 137 into the groove 128, the third lip 134, the fourth lip 135 and the inner surface of the second body 122 are in transition fit, and the second sealing cavity 136 is used to achieve the sealing connection between the second connector 130 and the first connector 120.

It should be noted that the first joint 120 is always connected to the combination valve 100, and therefore the tightness of the connection between the outlet port 115 and the first body 121 is particularly important. Therefore, when the first joint 120 is installed on the combination valve 100, an annular groove 141 is provided at a position outside the air outlet of the air outlet 115 and aligned with the first lip 125 and the second lip 126, a locking member 142 is installed on the annular groove 141, the annular groove 141 and the locking member 142 are in transition fit, so that the closing degree of the sealing air tap 123 is enhanced, and the transition fit between the air outlet of the air outlet 115 and the first lip 125, the second lip 126 is enhanced, so that the sealing performance of the connection between the air outlet of the air outlet 115 and the first body part 121 is further improved.

In a further embodiment, the sealing nozzle 123 exerts a rearward force on the top post 133 due to the energy storage of the elastic member 124, and thus the stability of the connection of the sealing joint during gas transfer becomes particularly important. Therefore, a snap or a fastener is provided between the first joint 120 and the second joint 130, so as to ensure the connection stability between the first joint 120 and the second joint 130. In the present invention, a plurality of protrusions 143 are provided on the outer surface of the top pillar 133, and a ring-shaped stopper 144 corresponding to the protrusions 143 is provided on the fixing portion 123 a; when the second joint 130 is installed, the locking member 142 is slid towards the side close to the air outlet 115, then the second joint 130 is inserted into the first joint 120, since the second body 122 can be slightly deformed, the protrusion 143 can just slide over the limiting member 144, and then the locking member 142 is slid towards the side far from the air outlet 115, so that the protrusion 143 cannot move backwards, thereby fixing the first joint 120 and the second joint 130.

For the convenience of understanding the technical solution of the hydrogen storage container combination valve 100 for moving objects, a brief description will be made of a control method thereof:

in the process of gas filling, the control valve 116 is adjusted to communicate the gas outlet 115 with the connecting port 111, then a negative pressure device is externally connected to the connecting port 111 to vacuumize the hydrogen storage bottle and activate the solid hydrogen storage material in the hydrogen storage bottle; then adjusting the control valve 116 to communicate the inflation inlet 112 with the connection port 111, and then externally connecting a hydrogen device on the inflation inlet 112 to realize hydrogen charging;

in the air outlet process, the second connector 130 is connected with the first connector 120, the top column 133 jacks up the sealing air nozzle 123 to force the sealing air nozzle 123 to open to form a passage, then the control valve 116 is adjusted to communicate the air outlet 115 with the connector 111, and then the air outlet 115 is externally connected with a pile air supply pipeline to realize air supply to the hydrogen equipment;

in the pressure relief process, the detection pressure of the pressure sensor is greater than the pressure threshold value, the safety valve 113 is automatically triggered to be opened, the safety valve 113 is communicated with the connecting port 111, and automatic pressure relief is achieved.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.

Claims

1. A hydrogen storage device combination valve for moving objects is characterized in that the combination valve is a multifunctional integrated valve;

the combination valve includes:

a valve body;

the safety valve is communicated with the connecting port to ensure that the internal pressure of the hydrogen storage bottle is controlled within a low pressure range of 1-3 MPa;

2. The hydrogen storage combination valve for a mobile object of claim 1, wherein the combination valve is of unitary construction.

3. The hydrogen storage combination valve for a mobile object of claim 1, wherein the combination valve is installed at a gas outlet of the hydrogen storage cylinder; the combination valve and the hydrogen storage bottle are connected integrally.

4. The hydrogen storage combination valve for a mobile object of claim 1, wherein the valve body is made of aluminum alloy, titanium alloy or metallic copper.

5. The hydrogen storage combination valve for a mobile object of claim 1, wherein one end of the connection port is provided with a pressure sensor, and an auto-triggering device for actuating the safety valve is installed on the safety valve.

6. The hydrogen storage combination valve for a mobile object of claim 1, wherein a sealing joint is connected to the vent;

7. The hydrogen storage combination valve for a mobile object of claim 6, wherein the first joint comprises: the first body part is connected with the vent in a sealing mode, the second body part is connected with the second connector in a sealing mode, a sealing air nozzle is arranged in the second body part, and an elastic piece is arranged outside the sealing air nozzle;

8. The hydrogen storage combination valve for a mobile object of claim 7, wherein the second joint comprises: a third body portion sealingly connected to the second body portion; the fourth body part is connected with the electric pile air supply pipeline in a sealing mode, a top column is arranged inside the third body part, and the top column is a hollow pipeline;

9. The hydrogen storage combination valve for a mobile object of claim 8, wherein the first connector and the second connector are connected by a snap fit or a fastener.

10. A control method of a hydrogen storage unit combination valve for a mobile object based on any one of claims 6 to 9, characterized by comprising the steps of: