CN218299835U

CN218299835U - Hydrogen storage and recycling system of fuel cell

Info

Publication number: CN218299835U
Application number: CN202222838460.4U
Authority: CN
Inventors: 韩慕皓
Original assignee: If Technology Co Ltd
Current assignee: If Technology Co Ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-01-13
Anticipated expiration: 2032-10-26

Abstract

The utility model provides a hydrogen storage and recovery system of a fuel cell, which comprises a vehicle hydrogen storage unit and a hydrogen recovery unit; the vehicle hydrogen storage unit comprises a first hydrogen storage module, a hydrogenation gas path structure communicated with the first hydrogen storage module and a supply gas path structure communicated with the first hydrogen storage module, wherein the gas outlet end of the supply gas path structure is communicated with the fuel cell unit, the gas outlet end of the supply gas path structure is also provided with a recovery gas outlet, a recovery gas outlet valve is arranged at the recovery gas outlet, and the gas outlet end of the recovery gas outlet valve is connected with a first connector; the hydrogen recovery unit comprises a second hydrogen storage module and a second joint communicated with the air inlet end of the second hydrogen storage module, and the first joint is detachably connected with the second joint. The utility model discloses can only use hydrogen recovery unit at the in-process of production or maintenance, automobile-used hydrogen storage unit and hydrogen recovery unit do not occupy the vehicle inner space under all the other operating modes, also can satisfy the demand that hydrogen was retrieved, can reduce the waste of hydrogen, still improve the safety in utilization.

Description

Hydrogen storage and recycling system of fuel cell

Technical Field

The utility model belongs to the technical field of fuel cell hydrogen supply equipment, concretely relates to recycle system is stored to fuel cell's hydrogen.

Background

A fuel cell vehicle is a kind of electric vehicle, and energy of a battery is directly converted into electric energy by chemical action (non-combustion) of hydrogen and oxygen. The chemical reaction process of the fuel cell does not produce harmful products, so the fuel cell vehicle is a pollution-free vehicle, and the energy conversion efficiency of the fuel cell is 2 to 3 times higher than that of an internal combustion engine, so the fuel cell vehicle is an ideal vehicle in the aspects of energy utilization and environmental protection, and has the advantages of environmental friendliness, short hydrogenation time, long endurance and the like.

The hydrogen supply is one of the core factors of the normal operation of the fuel cell, the hydrogen supply function is mainly completed by a hydrogen storage system in a vehicle, and one of the common hydrogen storage systems is a high-pressure gaseous hydrogen storage system. In order to check whether the gas cylinder in the high-pressure gaseous hydrogen storage system leaks, nitrogen pressure maintaining is usually carried out on line after the high-pressure gaseous hydrogen storage system is loaded, hydrogen replacement operation is carried out after the pressure maintaining operation is finished, and the purpose of hydrogen replacement is to replace nitrogen or air in the gas cylinder with hydrogen for a fuel cell. The gas displaced from the cylinder (containing hydrogen) is often vented directly to the atmosphere through a vent port provided in the hydrogen storage system.

Because the fuel cell has high requirement on the purity of hydrogen, multiple times of replacement (generally 3-5 times, the replacement pressure is generally 3-5 MPa for charging hydrogen and 0.2-0.3 MPa for discharging hydrogen) are needed to ensure the purity of the hydrogen in the gas cylinder. The direct discharge of gas containing hydrogen to the external environment has certain potential safety hazards, if the hydrogen concentration is too high or static electricity is generated due to improper operation during the discharge, safety accidents such as combustion, explosion and the like can be caused, fire disasters are easy to control, and the danger coefficient is very high; meanwhile, the purchase price of hydrogen is expensive, which also causes the waste of hydrogen, resulting in high production cost.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a fuel cell's hydrogen is stored and is retrieved utilization system aims at solving the dangerous big of hydrogen replacement operation of hydrogen storage system, and the extravagant more problem of hydrogen.

In order to achieve the above object, the utility model adopts the following technical scheme:

the hydrogen storage and recovery system for the fuel cell comprises a vehicle hydrogen storage unit and a hydrogen recovery unit;

the vehicle hydrogen storage unit comprises a first hydrogen storage module, a hydrogenation gas path structure communicated with the first hydrogen storage module and a supply gas path structure communicated with the first hydrogen storage module, wherein a gas outlet end of the supply gas path structure is communicated with the fuel cell unit, a recovery gas outlet is formed at the gas outlet end of the supply gas path structure, a recovery gas exhaust valve is arranged at the recovery gas outlet, and the gas outlet end of the recovery gas exhaust valve is connected with a first connector;

the hydrogen recovery unit comprises a second hydrogen storage module and a second joint communicated with the gas inlet end of the second hydrogen storage module, and the first joint is detachably connected with the second joint.

In a possible implementation manner, the second hydrogen storage module comprises a first valve, a buffer container, a second valve and a hydrogen pumping storage device which are connected in series in sequence along the gas flow direction, and the gas inlet end of the first valve is connected with the second joint.

In a possible implementation manner, the hydrogen pumping storage device comprises a compressor and a second storage tank connected with the gas outlet end of the compressor, and the gas inlet end of the compressor is communicated with the gas outlet end of the second valve.

In one possible implementation, the air inlet end of the buffer container is provided with a second pressure sensor.

In one possible implementation, a second one-way valve is provided between the second joint and the second hydrogen storage module.

In a possible implementation manner, the first hydrogen storage module includes a first storage tank and a third valve disposed at a tank opening of the first storage tank, and both the gas outlet end of the hydrogenation gas path structure and the gas inlet end of the supply gas path structure are communicated with the third valve.

In one possible implementation, a first pressure sensor is further integrated on the third valve, and the third valve is provided with a pressure relief discharge port.

In a possible implementation manner, the hydrogenation gas path structure comprises a hydrogenation interface, a filter and a first one-way valve which are sequentially connected in series along the gas flow direction, and the gas outlet end of the first one-way valve is communicated with the first hydrogen storage module.

In a possible implementation manner, the gas supply path structure comprises a pressure reducing valve and a third pressure sensor, a gas inlet end of the pressure reducing valve is communicated with the first hydrogen storage module, a testing end of the third pressure sensor is located at the downstream of the pressure reducing valve, and a gas inlet end of the recovery exhaust valve is located at the downstream of the third pressure sensor.

In one possible implementation, the pressure reducing valve is a film pressure reducing valve, and a safety valve is arranged at a pressure equalizing pipe of the pressure reducing valve.

Compared with the prior art, in the scheme shown in the embodiment of the application, the vehicular hydrogen storage unit is installed in a finished vehicle, wherein the first hydrogen storage module can store hydrogen and supply the hydrogen to the fuel cell unit through the supply gas path structure, and the hydrogen replacement process is that the hydrogenation gas path structure is used for filling the hydrogen into the first hydrogen storage module and discharging the replaced gas to the vehicular hydrogen storage unit through the recovery exhaust port close to the gas outlet end of the supply gas path structure; the gas discharged from the hydrogen storage unit for the vehicle is recovered through the second hydrogen storage module, and the recovered gas can be used for energy storage, power generation or other purposes although the use requirement of the fuel cell cannot be met due to the low hydrogen concentration in the recovered gas. In the fuel cell's of this application hydrogen stores recycle system, can dismantle through first joint and second joint between automobile-used hydrogen storage unit and the hydrogen recovery unit and be connected, can realize only using hydrogen recovery unit at the in-process of production or maintenance, automobile-used hydrogen storage unit and hydrogen recovery unit under all the other operating modes, do not occupy the vehicle inner space, also can satisfy the demand that hydrogen was retrieved, can reduce the waste of hydrogen, the safety in utilization that still improves.

Drawings

FIG. 1 is a schematic view of a hydrogen storage unit for a vehicle according to an embodiment of the present invention;

FIG. 2 is a schematic view of an air flow for hydrogenation by a hydrogenation gas path structure according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of the flow of hydrogen gas to a fuel cell unit according to an embodiment of the present invention;

FIG. 4 is a schematic view of the gas flow of the embodiment of the present invention discharging the gas through the recovery vent;

fig. 5 is a schematic structural diagram of a hydrogen recovery unit adopted in the embodiment of the present invention.

Description of reference numerals:

100. a vehicular hydrogen storage unit;

110. a first hydrogen storage module; 111. a first storage tank; 112. a third valve; 112a, a pressure relief vent; 113. a first pressure sensor; 120. a hydrogenation gas circuit structure; 121. a hydrogenation interface; 122. a filter; 123. a first check valve; 130. a supply gas path structure; 131. a pressure reducing valve; 132. a third pressure sensor; 133. a safety valve; 140. recovering the exhaust valve; 150. a first joint;

200. a hydrogen recovery unit;

210. a second hydrogen storage module; 211. a first valve; 212. a buffer container; 213. a second valve; 214. pumping the hydrogen storage device; 2141. a compressor; 2142. a second storage tank; 215. a second pressure sensor; 220. a second joint; 230. a second check valve;

300. a fuel cell unit.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

In the claims, the specification and the drawings, unless otherwise expressly limited, the terms "first," "second," or "third," etc. are used for distinguishing between different elements and not for describing a particular sequence.

In the claims, the description and the drawings of the present invention, unless otherwise expressly limited, the terms "central", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", "high", "low", and the like, are used to indicate the orientation or positional relationship based on the orientation and positional relationship shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, the scope of protection of the present invention should not be limited.

In the claims, the description and the drawings of the present application, unless otherwise expressly limited, the term "fixedly connected" or "fixedly connected" is used, which is to be understood broadly, that is, any connection mode without displacement relation or relative rotation relation between the two, that is, including non-detachably fixed connection, integrated connection and fixed connection through other devices or elements.

In the claims, the specification and the drawings, the terms "including", "comprising" and variations thereof, if used, are intended to be inclusive and not limiting.

Referring to fig. 1 to 5, a hydrogen storage and recycling system of a fuel cell according to the present invention will be described. The hydrogen storage, recovery and utilization system of the fuel cell comprises a vehicle hydrogen storage unit 100 and a hydrogen recovery unit 200; the hydrogen storage unit 100 for the vehicle comprises a first hydrogen storage module 110, a hydrogenation gas path structure 120 communicated with the first hydrogen storage module 110, and a supply gas path structure 130 communicated with the first hydrogen storage module 110, wherein the gas outlet end of the supply gas path structure 130 is communicated with the fuel cell unit 300, the gas outlet end of the supply gas path structure 130 is also provided with a recovery gas outlet, a recovery gas exhaust valve 140 is arranged at the recovery gas outlet, and the gas outlet end of the recovery gas exhaust valve 140 is connected with a first connector 150; the hydrogen recovery unit 200 includes a second hydrogen storage module 210 and a second connector 220 communicated with an air inlet end of the second hydrogen storage module 210, and the first connector 150 is detachably connected with the second connector 220.

In this embodiment, the specific implementation of the first joint 150 and the second joint 220 includes, but is not limited to, a quick-plug type pipe joint, a threaded sealing joint, etc., and can meet the requirements of pipeline butt joint and detachable assembly.

Compared with the prior art, in the hydrogen storage, recovery and utilization system of the fuel cell provided in this embodiment, the vehicular hydrogen storage unit 100 is installed in a finished vehicle, wherein the first hydrogen storage module 110 can store hydrogen and supply hydrogen to the fuel cell unit 300 through the supply gas path structure 130, and the hydrogen replacement process is to charge hydrogen into the first hydrogen storage module 110 through the hydrogenation gas path structure 120 and discharge the replaced gas to the vehicular hydrogen storage unit 200 through the recovery gas outlet near the gas outlet end of the supply gas path structure 130; the gas discharged from the hydrogen storage unit 100 for vehicles is recovered by the second hydrogen storage module 210, and the recovered gas can be used for energy storage, power generation, or other purposes although the hydrogen concentration in the recovered gas is low and cannot meet the use requirement of the fuel cell. In the fuel cell's of this embodiment hydrogen storage recycle system, can dismantle the connection through first joint 150 and second joint 220 realization between automobile-used hydrogen storage unit 100 and the hydrogen recovery unit 200, can realize only using hydrogen recovery unit 200 at the in-process of production or maintenance, hydrogen storage unit 100 and hydrogen recovery unit 200 are used under all other operating modes, do not occupy the vehicle inner space, also can satisfy the demand that hydrogen was retrieved, can reduce the waste of hydrogen, the safety in utilization that still improves.

In some embodiments, the second hydrogen storage module 210 may be configured as shown in FIG. 5. Referring to fig. 5, the second hydrogen storage module 210 includes a first valve 211, a buffer container 212, a second valve 213, and a hydrogen pumping storage 214 connected in series in the gas flow direction, and an air inlet end of the first valve 211 is connected to a second connector 220. Wherein the hydrogen pumping reservoir 214 is capable of providing a motive force for gas flow; particular embodiments of buffer container 212 include, but are not limited to, a buffer tank. At the beginning of use, the second valve 213 is closed and the first valve 211 is opened, and the displaced gas naturally flows into the buffer container 212; when the gas pressure in the buffer container 212 is equal to the gas pressure of the hydrogen storage unit 100 for a vehicle, the replacement gas does not flow into the buffer container 212 any more, and at this time, the first valve 211 is closed and the second valve 213 is opened, so that the gas flows into the hydrogen pumping storage 214; after the buffer container 212 is substantially evacuated, the second valve 213 is closed again and the first valve 211 is opened again, and the above steps are repeated. After the scheme of the embodiment is adopted, the replaced gas naturally circulates under the action of the pressure difference between the buffer container 212 and the vehicular hydrogen storage unit 100, the airflow is smooth, the hydrogen is ensured to fully circulate in the first hydrogen storage module 110, the problem that the hydrogen is sucked away due to insufficient circulation is avoided, the consumption of the hydrogen is further reduced, and the replacement efficiency is improved; meanwhile, the buffer container 212 is used for realizing gas buffer storage, so that the hydrogen pumping storage device 214 realizes intermittent gas pumping and storage, and gas can slowly fill the inner cavity of the hydrogen pumping storage device 214, thereby avoiding the problem that the smoothness of the gas flow is finally influenced due to the turbulence generated in the hydrogen pumping storage device 214 caused by continuous pumping.

In some embodiments, the hydrogen pumping accumulator 214 may be configured as shown in FIG. 5. Referring to fig. 5, the hydrogen pumping storage 214 includes a compressor 2141 and a second storage tank 2142 connected to an outlet of the compressor 2141, and an inlet of the compressor 2141 is connected to an outlet of the second valve 213. The compressor 2141 is a driven fluid machine that elevates low-pressure gas to high-pressure gas, and provides power for gas circulation, ensuring that gas can be fully transferred from the buffer container 212 to the second storage tank 2142, and the hydrogen pumping storage tank 214 has a simple and compact overall structure and reliable operation performance.

In some embodiments, the air inlet end of the buffer container 212 is provided with a second pressure sensor 215 for sensing the air pressure of the buffer container 212, as shown in fig. 5. The embodiment realizes that the second pressure sensor 215 is external, reduces the difficulty of sensor setting, facilitates the overhaul and replacement of the second pressure sensor 215, and is favorable for reducing the production and maintenance cost.

Referring to fig. 5, in some embodiments, a second check valve 230 is disposed between the second connector 220 and the second hydrogen storage module 210, so that gas can only flow from the second connector 220 to the second hydrogen storage module 210, thereby preventing gas backflow from affecting the recovery process of the replacement gas.

In this embodiment, since the number of times of disassembling and assembling the hydrogen recovery unit 200 is relatively frequent, the connection pipes between the second joint 220 and the second check valve 230, between the second check valve 230 and the first valve 211, between the first valve 211 and the buffer container 212, between the buffer container 212 and the second valve 213, between the second valve 213 and the compressor 2141, and between the compressor 2141 and the second storage tank 2142 all adopt metal hoses, so that the problem of abrasion of the connection pipes can be effectively avoided, the service life of the connection pipes can be prolonged, and the use cost of the hydrogen recovery unit 200 can be reduced.

In some embodiments, the first hydrogen storage module 110 may be configured as shown in fig. 1-4. Referring to fig. 1 to 4, the first hydrogen storage module 110 includes a first storage tank 111 and a third valve 112 disposed at a tank port of the first storage tank 111, and an outlet end of the hydrogenation gas path structure 120 and an inlet end of the supply gas path structure 130 are both communicated with the third valve 112. In the embodiment, the third valve 112 is integrated at the tank opening of the first storage tank 111, so that the airflow path is shortened, and the structure compactness is kept high.

In this embodiment, in order to avoid discharging the hydrogen gas introduced through the hydrogenation gas path structure 120 before the hydrogen gas is not fully filled in the first storage tank 111, a third valve 112 may be provided with a gas inlet and a gas outlet respectively communicated with the inner cavity of the first storage tank 111, wherein the gas inlet is connected to the hydrogenation gas path structure 120, and the gas outlet is connected to the supply gas path structure 130; the air inlet is provided with an air inlet pipe which extends to the tail end (far away from one end of the tank opening) of the first storage tank 111, so that introduced hydrogen can be gradually diffused to the tank opening from the tail end of the first storage tank 111 and then discharged, and the gas replacement efficiency is improved.

Referring to fig. 1, fig. 4, in some embodiments, a first pressure sensor 113 is further integrated with the third valve 112, and the third valve 112 has a pressure relief vent 112a. The first pressure sensor 113 is a high pressure sensor, and is mainly used for sensing the air pressure in the first storage tank 111, and if the air pressure in the first storage tank 111 is too high, the pressure is released and exhausted through the pressure release exhaust port 112a, so that the risk of explosion of the first storage tank 111 is avoided, and the use safety is improved.

In some embodiments, the hydrogenation gas circuit structure 120 may be as shown in fig. 1 to 4. Referring to fig. 1 to 4, the hydrogenation gas path structure 120 includes a hydrogenation interface 121, a filter 122 and a first check valve 123 connected in series in sequence along the gas flow direction, and the gas outlet end of the first check valve 123 is communicated with the first hydrogen storage module 110.

Some embodiments adopt the structure shown in fig. 1 to 4, the supply air path structure 130 includes a pressure reducing valve 131 and a third pressure sensor 132, an air inlet end of the pressure reducing valve 131 is communicated with the first hydrogen storage module 110, a testing end of the third pressure sensor 132 is located downstream of the pressure reducing valve 131, and an air inlet end of the recovery exhaust valve 140 is located downstream of the third pressure sensor 132. The pressure reducing valve 131 of the present embodiment can automatically reduce the higher air pressure to the required low air pressure, and when the air pressure on the high pressure side fluctuates, it can perform an automatic adjustment function, so that the air pressure on the low pressure side is stable, the air flow in the air supply path structure 130 is ensured to be stable, and the pressure reducing valve is suitable for being butted with the hydrogen recovery unit 200 for exhaust.

In some embodiments, the pressure relief valve 131 is a thin film pressure relief valve having a relief valve 133 at a pressure equalizer thereof, as shown in fig. 1-4. The pressure regulating and stabilizing actions of the film type pressure reducing valve are stable, and the film type pressure reducing valve is suitable for pipelines of water and non-corrosive liquid media and is suitable for the working environment of the application; in addition, the safety valve 133 is used to prevent the pressure reducing valve 131 from being damaged due to overpressure, when the pressure is slightly higher than the normal working pressure of the pressure reducing valve 131, the safety valve 133 is automatically opened to reduce the pressure, and when the pressure is slightly lower than the normal working pressure of the pressure reducing valve 131, the safety valve 133 is automatically closed to stop discharging the fluid and maintain the sealing. It should be noted that, the specific structure of the diaphragm relief valve and the relief valve 133 can refer to the valve structure of the existing relief valve and relief valve, and will not be described herein.

The specific embodiment of the hydrogen storage recycling system of the fuel cell of the present application is as follows:

the first valve 211, the second valve 213, the third valve 112, the recovery exhaust valve 140 and the pressure reducing valve 131 are all solenoid valves, and the first pressure sensor 113, the second pressure sensor 215, the third pressure sensor 132, the compressor 2141, the first valve 211, the second valve 213, the third valve 112 and the recovery exhaust valve 140 are respectively in communication connection with the control unit.

The specific hydrogen replacement process is as follows:

1) The first connector 150 and the second connector 220 are connected with each other, and the first storage tank 111 is communicated with the hydrogenation gas path structure 120 and the supply gas path structure 130 through the third valve 112;

2) The hydrogenation interface 121 is connected with a hydrogen gas source, and the first storage tank 111 is filled with gas through the hydrogenation gas path structure 120;

3) The control unit controls the recovery exhaust valve 140 and the first valve 211 to open, the second valve 213 remains closed, and the vehicle hydrogen storage unit 100 charges gas into the buffer container 212 through the recovery exhaust port because the gas pressure in the supply gas path structure 130 is higher than that in the buffer container 212;

4) Acquiring air pressure values sensed by the second pressure sensor 215 and the third pressure sensor 132, if the two air pressure values are equal, determining that the air pressure of the vehicular hydrogen storage unit 100 is the same as the air pressure of the buffer container 212, closing the first valve 211 through the control unit, opening the second valve 213 and the compressor 2141, and pumping the gas in the buffer container 212 into the second storage tank 2142 by the compressor 2141;

5) Acquiring an air pressure value sensed by the second pressure sensor 215, if the air pressure value is lower than a preset low value, determining that the buffer container 212 is evacuated, and at this time, opening the first valve 211 and closing the second valve 213 and the compressor 2141 through the control unit;

6) Repeating the steps 1) to 5) until the air pressure value sensed by the third pressure sensor 132 reaches a preset standard value (for example, 0.2 to 0.3 MPa), stopping filling hydrogen into the buffer container 212, and performing a single replacement deflation process;

7) The displacement gas release process is repeated several times (e.g., 3 to 5 times) until the hydrogen concentration in the first storage tank 111 reaches the standard concentration value.

The hydrogen storage and recycling system of the fuel cell can also release the pressure through the third valve 112, and the specific process is as follows:

acquiring a value of air pressure in the first storage tank 111 through the first pressure sensor 113, and if the value is higher than a preset high value, controlling the third valve 112 to open the pressure relief discharge port 112a through the control unit to perform pressure relief; until the air pressure value sensed by the first pressure sensor 113 is not higher than a preset high value, the pressure-relief discharge port 112a is closed.

The control unit may be a vehicle-mounted computer, or may be a mobile control terminal (e.g., a notebook computer, etc.), which is not limited herein.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims

1. A hydrogen storage and recycling system of a fuel cell is characterized by comprising a vehicular hydrogen storage unit and a hydrogen recycling unit;

2. The hydrogen storage and recovery system for a fuel cell according to claim 1, wherein the second hydrogen storage module comprises a first valve, a buffer container, a second valve and a hydrogen pumping storage device connected in series in sequence along a gas flow direction, and an air inlet end of the first valve is connected to the second connector.

3. The system of claim 2, wherein the hydrogen storage device comprises a compressor and a second storage tank connected to the outlet of the compressor, and the inlet of the compressor is connected to the outlet of the second valve.

4. The hydrogen storage and recovery system of fuel cell according to claim 2, wherein the air inlet end of the buffer container is provided with a second pressure sensor.

5. The system of claim 1, wherein a second one-way valve is disposed between the second connector and the second hydrogen storage module.

6. The hydrogen storage and recycling system of a fuel cell of claim 1, wherein the first hydrogen storage module comprises a first storage tank and a third valve disposed at a tank opening of the first storage tank, and the gas outlet of the hydrogenation gas path structure and the gas inlet of the gas supply path structure are both in communication with the third valve.

7. The system of claim 6, wherein the third valve further comprises a first pressure sensor integrated with the third valve, the third valve having a pressure relief vent.

8. The hydrogen storage and recycling system of the fuel cell according to claim 1, wherein the hydrogenation gas path structure comprises a hydrogenation interface, a filter and a first check valve connected in series in sequence along the gas flow direction, and the gas outlet end of the first check valve is communicated with the first hydrogen storage module.

9. The hydrogen storage and recovery system of fuel cell of claim 1, wherein the gas supply path structure comprises a pressure reducing valve and a third pressure sensor, the inlet end of the pressure reducing valve is communicated with the first hydrogen storage module, the testing end of the third pressure sensor is located downstream of the pressure reducing valve, and the inlet end of the recovery vent valve is located downstream of the third pressure sensor.

10. The system for storing and recycling hydrogen gas for a fuel cell according to claim 9, wherein the pressure reducing valve is a thin film type pressure reducing valve having a safety valve at a pressure equalizing pipe.