Portable fuel cell supply system applied to shallow sea

Abstract

The invention discloses a portable fuel cell replenishment system applied to shallow sea, which comprises a gas replenishment unit, a drainage unit and a fuel cell stack, the gas replenishment unit comprises a fuel gas cylinder, a gas outlet of the fuel gas cylinder is sequentially connected with a first control valve and a connecting piece, the fuel gas cylinder is detachably connected with the drainage unit through the connecting piece, and the first control valve is connected with the first control valve. The fuel cell stack is connected with the drainage unit, the drainage unit is used for conveying fuel gas output by the fuel gas cylinder to the fuel cell stack, and the drainage unit is also used for discharging seawater introduced when the fuel gas cylinder is replaced. The problem that in the prior art, when a fuel gas cylinder is replaced in seawater, the seawater enters a pipeline, and the seawater in the pipeline is difficult to discharge is solved.

Description

Technical Field

[0001] The invention relates to the technical field of fuel cells, and in particular to a portable fuel cell supply system used in shallow seas. Background Art

[0002] Hydrogen fuel cells have the characteristics of high energy storage density, low noise, zero emissions, modular design, and easy installation and maintenance. They are particularly suitable for use in underwater environments. Small UUV devices used in shallow waters are sometimes required to have the ability to operate underwater for a long time. They usually use underwater wireless charging technology and underwater energy supply platforms to charge and then work.

[0003] The underwater fuel cell charging platform has a large system and needs to carry a large amount of fuel on top of its high energy storage requirements, which often results in a large overall volume. When the volume is limited and it cannot carry enough fuel, it needs to frequently surface for fuel replenishment, which reduces the concealment of the underwater platform replenishment. In actual work, when divers are refueling underwater, they need to replace the fuel cylinders. When the fuel cylinders are replaced, a large amount of seawater will enter the pipeline. If the seawater in the pipeline is not discharged, it will affect the normal operation of the fuel cell stack. Summary of the invention

[0004] The purpose of the present invention is to overcome the above technical deficiencies and provide a portable fuel cell supply system for use in shallow seas, so as to solve the problem in the prior art that when replacing fuel cylinders in seawater, seawater will enter the pipeline and it is difficult to discharge the seawater in the pipeline.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: The present invention provides a portable fuel cell supply system for use in shallow seas, comprising an air supply unit, a drainage unit and a fuel cell stack, wherein the air supply unit comprises a fuel gas cylinder, the gas outlet of the fuel gas cylinder is sequentially connected to a first control valve and a connecting piece, the fuel gas cylinder is detachably connected to the drainage unit via the connecting piece, the fuel cell stack is connected to the drainage unit, the drainage unit is used to transport the fuel gas output via the fuel gas cylinder to the fuel cell stack, and the drainage unit is also used to discharge seawater introduced when the fuel gas cylinder is replaced.

[0006] In one embodiment, the drainage unit includes a buffer tank and a gas storage tank, a partition is slidably provided in the buffer tank, an air inlet on one side of the buffer tank is connected to a second control valve, an air outlet on the other side of the buffer tank is connected to a first solenoid valve, a drainage port at the top of the buffer tank is sequentially connected to a second solenoid valve and a third control valve, a gas supply port at the bottom of the buffer tank is connected to a third solenoid valve, the second control valve is connected to the first control valve via a connector, the first solenoid valve is connected to the fuel cell stack, and the air outlet of the gas storage tank is connected to the third solenoid valve. When the second control valve and the first solenoid valve are closed, the gas transported from the gas storage tank to the buffer tank can push the partition to slide toward the top of the buffer tank.

[0007] In one embodiment, a filter is provided between the first solenoid valve and the fuel cell stack.

[0008] In one embodiment, the gas storage tank is a high-pressure gas storage tank, and high-pressure gas is stored in the gas storage tank.

[0009] In one embodiment, the connector is a compression fitting.

[0010] In one embodiment, the buffer tank is in the shape of a rectangular parallelepiped or a cube as a whole.

[0011] In one embodiment, four inner side walls of the buffer tank are each provided with a slide groove, and a sliding block matching with each slide groove is provided on the peripheral side of the partition.

[0012] In one embodiment, the buffer tank and the gas storage tank are both made of alloy plates or stainless steel plates.

[0013] In one embodiment, the first control valve, the second control valve and the third control valve are all ball valves.

[0014] In one embodiment, the fuel cell stack is a hydrogen fuel cell stack.

[0015] Compared with the prior art, the present invention provides a portable fuel cell supply system for shallow sea use, in which a first control valve and a connecting piece are connected in sequence through the gas outlet of the fuel gas cylinder, the fuel gas cylinder is detachably connected to a drainage unit via the connecting piece, the fuel cell stack is connected to the drainage unit, the drainage unit is used to transport the fuel gas output through the fuel gas cylinder to the fuel cell stack, and is detachably connected to the drainage unit through the connecting piece, so that the fuel gas cylinder can be replaced conveniently, thereby enhancing the long-term underwater working capability of the fuel cell stack; at the same time, the drainage unit can discharge seawater introduced when replacing the fuel gas cylinder, thereby enhancing the safety of the fuel cell stack. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1is a schematic structural diagram of a portable fuel cell supply system for shallow sea provided by an embodiment of the present invention; Figure 2 It is a schematic diagram of the internal structure of a buffer tank provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] In order to solve the technical problem in the prior art that when replacing fuel cylinders in seawater, seawater will enter the pipeline and it is difficult to discharge the seawater in the pipeline, the present invention provides a portable fuel cell supply system for use in shallow seas, which can facilitate the replacement of fuel cylinders under the sea surface and discharge the seawater introduced into the pipeline when replacing the fuel cylinders, thereby enhancing the safety performance of the fuel cell stack during operation.

[0019] See also Figure 1-Figure 2 , Figure 1-Figure 2 A portable fuel cell replenishing system for shallow sea in one embodiment of the present invention comprises an air replenishing unit 1, a drainage unit 2 and a fuel cell stack 3, wherein the air replenishing unit 1 comprises a fuel gas cylinder 11, the gas outlet of the fuel gas cylinder 11 is sequentially connected with a first control valve 12 and a connector 13, the fuel gas cylinder 11 is detachably connected to the drainage unit 2 via the connector 13, the fuel cell stack 3 is connected to the drainage unit 2, the drainage unit 2 is used to transport the fuel gas outputted via the fuel gas cylinder 11 to the fuel cell stack 3, and the drainage unit 2 is also used to discharge seawater introduced when the fuel gas cylinder 11 is replaced.

[0020] In this specific embodiment, the drainage unit 2 includes a buffer tank 21 and a gas storage tank 22, a partition 211 is slidably provided in the buffer tank 21, the air inlet on one side of the buffer tank 21 is connected to the second control valve 23, the air outlet on the other side of the buffer tank 21 is connected to the first solenoid valve 24, the drainage port at the top of the buffer tank 21 is connected to the second solenoid valve 25 and the third control valve 26 in sequence, the gas supply port at the bottom of the buffer tank 21 is connected to the third solenoid valve 27, the second control valve 23 is connected to the first control valve 12 through the connecting piece 13, the first solenoid valve 24 is connected to the fuel cell stack 3, the air outlet of the gas storage tank 22 is connected to the third solenoid valve 27, when the second control valve 23 and the first solenoid valve 24 are closed, the gas transported from the gas storage tank 22 to the buffer tank 21 can push the partition 211 to slide toward the top of the buffer tank 21.

[0021] On the basis of the above solution, in order to facilitate filtering out impurities introduced when replacing the fuel gas cylinder 11 , specifically, a filter 4 is provided between the first solenoid valve 24 and the fuel cell stack 3 .

[0022] In this specific embodiment, the connector 13 is a ferrule joint, which is a mechanical device used to connect a pipe or hose to various piping systems. It usually consists of three parts: a joint body, a ferrule and a nut. When in use, the ferrule can be placed on the pipe, and then the pipe is inserted into the joint body, and then the nut is screwed onto the joint body. As the nut is tightened, it will exert pressure on the ferrule, and the ferrule will be forced to deform inward and fit tightly with the outer surface of the pipe, and also fit with the conical surface of the joint body, which will produce a mechanical locking effect and seal.

[0023] In this specific embodiment, the buffer tank 21 is in the shape of a rectangular parallelepiped or a cube as a whole, wherein four inner side walls of the buffer tank 21 are provided with slide grooves, and the peripheral side of the partition plate 211 is provided with sliders matched with the slide grooves.

[0024] Specifically, the gas storage tank 22 is a high-pressure gas storage tank, and high-pressure gas is stored in the gas storage tank 22. The buffer tank 21 and the gas storage tank 22 are both made of alloy plates or stainless steel plates.

[0025] In this specific embodiment, the first control valve 12, the second control valve 23 and the third control valve 26 are all ball valves; and the fuel cell stack 3 is a hydrogen fuel cell stack.

[0026] In order to better understand the invention, the following Figure 1 and Figure 2 The technical solution of the present invention is described in detail: Step 1: In the working state, the second solenoid valve 25, the third solenoid valve 27 and the third control valve 26 are in the closed state. After the fuel gas cylinder 11 is depressurized, it passes through the first control valve 12, the second control valve 23, the buffer tank 21, the first solenoid valve 24 and the filter 4 in sequence to enter the fuel cell stack 3 for combustion and power generation; when the fuel is about to run out and needs to be refueled, the first solenoid valve 24 is closed to put the fuel cell stack 3 in a closed state; Step 2: After the diver carries the gas replenishment unit 1 to the supply side of the fuel cell stack 3, he closes the second control valve 23, disconnects the connector 13, replaces the new fuel gas cylinder 11 and the first control valve 12, and reconnects the pipeline through the new connector 13; Step 3: After the pipeline is connected, first open the second control valve 23 to connect the buffer tank 21 with the seawater in the pipeline, open the fuel gas cylinder 11 and the first control valve 12, use the gas pressure of the fuel gas cylinder 11 to squeeze all the seawater in the pipeline into the buffer tank 21, and then close the second control valve 23; Step 4: Open the second solenoid valve 25 and the third solenoid valve 27, close the second control valve 23 and the first solenoid valve 24, so that the high-pressure gas in the gas storage tank 22 is pressed into the buffer tank 21, and the high-pressure gas pushes the partition 211 upward, and squeezes all the seawater in the buffer tank 21 into the pipeline between the second solenoid valve 25 and the third control valve 26, close the second solenoid valve 25 and the third solenoid valve 27, and then manually open the third control valve 26. At this time, the seawater pressure in the pipeline is higher than the external seawater pressure, and the seawater in the pipeline can be depressurized and discharged; Step 5: Open the second control valve 23 and the first solenoid valve 24, and the fuel gas in the fuel gas cylinder 11 can enter the fuel cell stack 3 to achieve fuel replenishment.

[0027] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A portable fuel cell supply system for shallow sea, characterized in that: It includes an air replenishing unit, a drainage unit and a fuel cell stack, wherein the air replenishing unit includes a fuel gas cylinder, the gas outlet of the fuel gas cylinder is sequentially connected to a first control valve and a connecting piece, the fuel gas cylinder is detachably connected to the drainage unit via the connecting piece, the fuel cell stack is connected to the drainage unit, the drainage unit is used to transport the fuel gas output via the fuel gas cylinder to the fuel cell stack, and the drainage unit is also used to discharge seawater introduced when the fuel gas cylinder is replaced.

2. A portable fuel cell supply system for shallow sea according to claim 1, characterized in that: The drainage unit includes a buffer tank and a gas storage tank, a partition is slidably provided in the buffer tank, an air inlet on one side of the buffer tank is connected to a second control valve, an air outlet on the other side of the buffer tank is connected to a first solenoid valve, a drainage port on the top of the buffer tank is connected to a second solenoid valve and a third control valve in sequence, a gas delivery port at the bottom of the buffer tank is connected to a third solenoid valve, the second control valve is connected to the first control valve via a connector, the first solenoid valve is connected to the fuel cell stack, and the air outlet of the gas storage tank is connected to the third solenoid valve, and when the second control valve and the first solenoid valve are closed, the gas transported from the gas storage tank to the buffer tank can push the partition to slide toward the top of the buffer tank.

3. A portable fuel cell supply system for shallow sea according to claim 2, characterized in that: A filter is provided between the first solenoid valve and the fuel cell stack.

4. A portable fuel cell supply system for shallow sea according to claim 1, characterized in that: The gas storage tank is a high-pressure gas storage tank, and high-pressure gas is stored in the gas storage tank.

5. A portable fuel cell supply system for shallow sea use according to claim 1, characterized in that: The connecting piece is a ferrule type joint.

6. A portable fuel cell supply system for shallow sea use according to claim 2, characterized in that: The buffer tank is in the shape of a rectangular parallelepiped or a cube as a whole.

7. A portable fuel cell supply system for shallow sea use according to claim 6, characterized in that: The four inner side walls of the buffer tank are all provided with sliding grooves, and the peripheral side of the partition is provided with sliding blocks matched with each sliding groove.

8. A portable fuel cell supply system for shallow sea use according to claim 2, characterized in that: The buffer tank and the gas storage tank are both made of alloy plates or stainless steel plates.

9. A portable fuel cell supply system for shallow sea use according to claim 2, characterized in that: The first control valve, the second control valve and the third control valve are all ball valves.

10. A portable fuel cell supply system for shallow sea use according to claim 1, characterized in that: The fuel cell stack is a hydrogen fuel cell stack.

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