Solid hydrogen storage and fuel cell hydrogen recycling system and method

Abstract

The invention discloses a solid-state hydrogen storage and fuel cell hydrogen recycling system and method, and relates to the technical field of hydrogen energy, the system comprises a fuel cell system, a solid-state hydrogen storage recovery device, a solid-state hydrogen storage device and a controller; a dehumidification system, a pressurization system, a first one-way electromagnetic valve, a gas buffer tank and a second one-way electromagnetic valve are sequentially mounted and connected between a waste gas exhaust port of the fuel cell system and a hydrogen inlet of the solid hydrogen storage and recovery device; a third one-way electromagnetic valve is mounted at a hydrogen outlet of the solid hydrogen storage and recovery device and is connected to a hydrogen inlet of the fuel cell system; and a hydrogen outlet of the solid hydrogen storage device is provided with a fourth electromagnetic one-way valve and is connected to a hydrogen inlet of the fuel cell system. The waste gas exhausted by the fuel cell system can be recycled, hydrogen in the waste gas is recycled into the solid hydrogen storage and recovery device, and the utilization rate of hydrogen energy is increased.

Description

Technical Field

[0001] The present invention relates to the field of hydrogen energy technology, and in particular to a solid-state hydrogen storage and fuel cell hydrogen recycling system and method. Background Art

[0002] At present, with the rapid breakthrough of new energy technology and the rapid development of low-carbon economy, various new energy products are emerging in an endless stream. Solid-state hydrogen storage technology plays an important role in new energy technology as a safe, stable and efficient energy storage method. However, when the fuel cell system is coupled, a large amount of hydrogen is discharged into the air, resulting in energy waste and reducing the utilization rate of hydrogen energy. Therefore, how to reasonably utilize renewable energy and improve the utilization efficiency of hydrogen is an important direction for the current development of new energy technology. Summary of the invention

[0003] Therefore, in order to solve the above problems, the present invention provides a solid-state hydrogen storage and fuel cell hydrogen recycling system and method.

[0004] To achieve the above purpose, the technical solution provided by the present invention is as follows:

[0005] A solid-state hydrogen storage and fuel cell hydrogen recycling system, comprising a fuel cell system, a solid-state hydrogen storage recovery device, a solid-state hydrogen storage device, and a controller;

[0006] A dehumidification system, a pressurization system, a first one-way solenoid valve, a gas buffer tank, and a second one-way solenoid valve are sequentially installed and connected between the exhaust gas outlet of the fuel cell system and the hydrogen inlet of the solid-state hydrogen storage recovery device; under the control of the controller, the hydrogen in the exhaust gas passes through the dehumidification system, the pressurization system, the first one-way solenoid valve, the gas buffer tank, and the second one-way valve, and is stored in the solid-state hydrogen storage recovery device;

[0007] The hydrogen outlet of the solid-state hydrogen storage recovery device is installed with a third one-way solenoid valve and is connected to the hydrogen inlet of the fuel cell system; the hydrogen outlet of the solid-state hydrogen storage device is installed with a fourth solenoid one-way valve and is connected to the hydrogen inlet of the fuel cell system; under the control of the controller, the solid-state hydrogen storage recovery device and the solid-state hydrogen storage device can release hydrogen into the fuel cell system.

[0008] Optionally, a first flow meter is installed between the first one-way solenoid valve and the hydrogen inlet of the gas buffer tank, and the first flow meter is connected to a controller signal, and the controller can display the total amount of hydrogen entering the gas buffer tank.

[0009] Optionally, a pressure reducing valve is installed between the second one-way solenoid valve and the hydrogen inlet of the solid-state hydrogen storage recovery device.

[0010] Optionally, a second flow meter is installed between the pressure reducing valve and the hydrogen inlet of the solid-state hydrogen storage recovery device, and the second flow meter is connected to the controller signal, and the controller can display the total amount of hydrogen entering the solid-state hydrogen storage recovery device.

[0011] Optionally, the gas buffer tank is configured with a first pressure sensor and a first pressure relief valve, the first pressure sensor is used to detect the pressure value in the gas buffer tank, and the first pressure relief valve can relieve the pressure of the gas buffer tank; the first pressure sensor and the first pressure relief valve are respectively connected to the controller by signals; the controller can control whether the first pressure relief valve is opened according to the information transmitted by the first pressure sensor.

[0012] Optionally, the solid-state hydrogen storage recovery device is configured with a second pressure sensor and a second pressure relief valve, the second pressure sensor is used to monitor the pressure value in the solid-state hydrogen storage recovery device, and the second pressure relief valve can relieve the pressure of the solid-state hydrogen storage recovery device; the second pressure sensor and the second pressure relief valve are respectively connected to the controller by signals; the controller can control whether the second pressure relief valve is opened according to the information transmitted by the second pressure sensor.

[0013] Optionally, the solid-state hydrogen storage device is configured with a third pressure sensor and a third pressure relief valve, the third pressure sensor is used to monitor the pressure value in the solid-state hydrogen storage device, and the third pressure relief valve can relieve the pressure of the solid-state hydrogen storage device; the third pressure sensor and the third pressure relief valve are respectively connected to the controller by signals; the controller can control whether the third pressure relief valve is opened according to the information transmitted by the third pressure sensor.

[0014] Optionally, a hydrogen detector is also included, which is connected to the controller signal. The controller controls whether the solid-state hydrogen storage and fuel cell hydrogen recycling system stops running according to the information transmitted by the hydrogen detector.

[0015] Optionally, the outlet of the third one-way solenoid valve is connected to the hydrogen inlet of the fuel cell system after merging with the outlet of the fourth one-way solenoid valve.

[0016] The present invention also provides a solid-state hydrogen storage and fuel cell hydrogen recycling method, using the above-mentioned solid-state hydrogen storage and fuel cell hydrogen recycling system, including a hydrogen charging process and a hydrogen discharging process;

[0017] Hydrogen filling process: The fuel cell system discharges exhaust gas, the dehumidification system separates the exhaust gas into gas and liquid, the dry hydrogen enters the boosting system for boosting, the boosted hydrogen enters the gas buffer tank for buffering, and then enters the solid hydrogen storage recovery device for storage;

[0018] Hydrogen release process: The solid-state hydrogen storage device continuously releases hydrogen; when the pressure inside the solid-state hydrogen storage device is lower than the pressure inside the solid-state hydrogen storage recovery device, the solid-state hydrogen storage recovery device releases hydrogen to the fuel cell system.

[0019] The technical solution provided by the present invention has the following beneficial effects: the solid-state hydrogen storage and fuel cell hydrogen recycling system can recycle the exhaust gas discharged from the fuel cell system, and recycle the hydrogen in the exhaust gas into the solid-state hydrogen storage recovery device, thereby improving the utilization rate of hydrogen energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of this embodiment;

[0021] Figure 2 is a logic diagram showing the total amount of hydrogen in the gas buffer tank in this embodiment;

[0022] Figure 3 is a logic diagram showing the hydrogen pressure value of the gas buffer tank in this embodiment;

[0023] Figure 4 is a logic diagram showing the total amount of hydrogen in the solid-state hydrogen storage recovery device in this embodiment;

[0024] Figure 5 This is a logic diagram for processing whether the system hydrogen is leaking in this embodiment.

[0025] Explanation of the accompanying drawings: 1. Fuel cell system; 2. Dehumidification system; 3. Boosting system; 4. First one-way solenoid valve; 5. First flow meter; 6. Gas buffer tank; 7. Second one-way solenoid valve; 8. Pressure reducing valve; 9. Second flow meter; 10. Solid-state hydrogen storage recovery device; 11. Solid-state hydrogen storage device; 12. Third one-way solenoid valve; 13. Fourth one-way solenoid valve; 14. Pressure gauge; 15. First pressure sensor; 16. First pressure relief valve; 17. Second pressure sensor; 18. Second pressure relief valve; 19. Third pressure sensor; 20. Third pressure relief valve; 21. Controller. DETAILED DESCRIPTION

[0026] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0027] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0028] Reference Figure 1-5This embodiment provides a solid-state hydrogen storage and fuel cell hydrogen recycling system, including a fuel cell system 1, a solid-state hydrogen storage recovery device 10, a solid-state hydrogen storage device 11, and a controller 21.

[0029] Among them, the dehumidification system 2, the boosting system 3, the first one-way solenoid valve 4, the first flowmeter 5, the gas buffer tank 6, the second one-way solenoid valve 7, the pressure reducing valve 8, and the second flowmeter 9 are sequentially installed and connected between the exhaust gas outlet of the fuel cell system 1 and the hydrogen inlet of the solid hydrogen storage recovery device 10. Under the control of the controller 21, the hydrogen in the exhaust gas passes through the dehumidification system 2, the boosting system 3, the first one-way solenoid valve 4, the first flowmeter 5, the gas buffer tank 6, the second one-way valve, the pressure reducing valve 8, and the second flowmeter 9, and is stored in the solid hydrogen storage recovery device 10.

[0030] The hydrogen outlet of the solid-state hydrogen storage recovery device 10 is equipped with a third one-way solenoid valve 12, which is connected to the hydrogen inlet of the fuel cell system 1, and the third one-way solenoid valve 12 is connected to the controller 21 by signal. The hydrogen outlet of the solid-state hydrogen storage device 11 is also equipped with a fourth electromagnetic one-way valve, which is connected to the hydrogen inlet of the fuel cell system 1, and the fourth one-way solenoid valve 13 is connected to the controller 21 by signal. Under the control of the controller 21, the solid-state hydrogen storage recovery device 10 and the solid-state hydrogen storage device 11 can release hydrogen into the fuel cell system 1. In this embodiment, the outlet of the third one-way solenoid valve 12 and the outlet of the fourth one-way solenoid valve 13 are connected to the hydrogen inlet of the fuel cell system 1 after converging. In addition, a pressure reducing valve can be set at the hydrogen inlet of the fuel cell system 1 to reduce the pressure of hydrogen before entering the fuel cell system 1. The solid-state hydrogen storage and fuel cell hydrogen recycling system can recycle the exhaust gas discharged from the fuel cell system 1, and recycle the hydrogen in the exhaust gas into the solid-state hydrogen storage recovery device 10, thereby improving the utilization efficiency of hydrogen energy.

[0031] Specifically, the dehumidification system 2 can separate the exhaust gas into dry and wet gas and remove water vapor. The dehumidification system 2 is provided with a dry and wet sensing component, and the signal is connected to the controller 21. The controller 21 determines whether the hydrogen is dry based on its signal. If it is dry hydrogen, the dehumidification system 2 will send the dry hydrogen to the boosting system 3; if it is wet hydrogen, it will continue to be dehumidified in the dehumidification system 2 until it is dry.

[0032] The first one-way solenoid valve 4 is connected to the controller 21 by signal. A pressure sensor is provided in the boosting system 3, and the pressure sensor is connected to the controller 21 by signal. The controller 21 receives the hydrogen pressure information in the boosting system 3, and controls the opening or closing of the first one-way solenoid valve 4 according to whether the hydrogen pressure in the boosting system 3 reaches the set pressure value, that is, controls whether the hydrogen enters the gas buffer tank 6. The first flow meter 5 can monitor the total amount of hydrogen entering the gas buffer tank 6; and the controller 21 is connected to the first flow meter 5 by signal, and the controller 21 has a display panel that can display its flow value. Figure 2 As shown, the gas discharged from the fuel cell system 1 passes through the dehumidification system 2 to discharge dry hydrogen, and the dry hydrogen reaches a set pressure value through the boosting system 3, passes through the first one-way solenoid valve 4, and enters the gas buffer tank 6 for temporary storage through the first flow meter 5. The first flow meter 5 transmits a signal to the controller 21, and the controller 21 accumulates the flow and displays the total amount of hydrogen in the gas buffer tank 6 on the display panel of the controller 21.

[0033] The gas buffer tank 6 is equipped with a pressure gauge 14, a first pressure sensor 15 and a first pressure relief valve 16. The first pressure sensor 15 and the second one-way solenoid valve 7 are respectively connected to the controller 21 by signal. The controller 21 receives the information of the first pressure sensor 15 and displays the pressure value on the display panel of the controller 21. According to whether the pressure in the gas buffer tank 6 reaches the set pressure value, the opening or closing of the second one-way solenoid valve 7 is controlled, that is, whether the hydrogen flows to the solid-state hydrogen storage recovery device 10. The dry hydrogen flows into the solid-state hydrogen storage recovery device 10 after passing through the second one-way solenoid valve 7, the pressure reducing valve 8 and the second flowmeter 9. Figure 3 As shown, the gas discharged from the fuel cell system 1 passes through the dehumidification system 2 to discharge dry hydrogen, and the dry hydrogen passes through the boosting system 3 to reach the set hydrogen pressure value, passes through the first one-way solenoid valve 4, and enters the gas buffer tank 6 through the first flowmeter 5, and is temporarily stored in the gas buffer tank 6. The first pressure sensor 15 sends a signal to the controller 21. After the controller 21 determines that the pressure in the gas buffer tank 6 reaches the set value, it controls the second one-way solenoid valve 7 to open and charge the solid hydrogen storage recovery device 10 with hydrogen. The first pressure sensor 15 transmits a signal to the controller 21, and the controller 21 displays the pressure value on the display panel after logical calculation.

[0034] The second flow meter 9 can monitor the total amount of hydrogen flowing into the solid hydrogen storage recovery device 10. The controller 21 is connected to the second flow meter 9 signal and can display its total flow value. Figure 4As shown, the dry hydrogen in the gas buffer tank 6 flows into the solid hydrogen storage recovery device 10 through the second one-way solenoid valve 7, the pressure reducing valve 8 and the second flow meter 9. The second flow meter 9 transmits a signal to the controller 21, and the controller 21 accumulates the flow, and its accumulated flow is close to the theoretical calculated value, and displays the total amount of hydrogen entering the solid hydrogen storage recovery device 10 on the display panel.

[0035] In addition, the controller 21 is connected to the first pressure relief valve 16 by signal, and the controller 21 receives the signal of the first pressure sensor 15 to control the opening or closing of the first pressure relief valve 16 to ensure the safe operation of the gas buffer tank 6. The solid-state hydrogen storage recovery device 10 is equipped with a second pressure sensor 17 and a second pressure relief valve 18, and the second pressure sensor 17 and the second pressure relief valve 18 are respectively connected to the controller 21 by signal, and the controller 21 can receive the information of the second pressure sensor 17 to control the opening or closing of the second pressure relief valve 18. The solid-state hydrogen storage device 11 is equipped with a third pressure sensor 19 and a third pressure relief valve 20, and the third pressure sensor 19 and the third pressure relief valve 20 are respectively connected to the controller 21 by signal, and the controller 21 can receive the information of the third pressure sensor 19 to control the opening or closing of the third pressure relief valve 20.

[0036] The solid-state hydrogen storage and fuel cell hydrogen recycling system also includes a hydrogen detector, which can monitor whether the entire system has hydrogen leakage. The hydrogen detector is connected to the controller 21 by signal, and the display panel of the controller 21 can display whether the system has hydrogen leakage. If it displays "yes", it is safe and normal, and if it displays "no", it is an abnormal leakage. Figure 5 As shown, during the operation of the whole set of solid-state hydrogen storage and fuel cell hydrogen recycling system, if hydrogen leakage occurs, the hydrogen detector transmits information to the controller 21, and the controller 21 controls the whole set of solid-state hydrogen storage and fuel cell hydrogen recycling system to stop operating. When the pressure in the gas buffer tank 6 is abnormal, the first pressure sensor 15 transmits information to the controller 21, and the controller 21 controls the first pressure relief valve 16 to release pressure. When the pressure in the solid-state hydrogen storage recovery device 10 is abnormal, the second pressure sensor 17 transmits information to the controller 21, and the controller 21 controls the second one-way solenoid valve 7 to close, preventing hydrogen from entering the solid-state hydrogen storage recovery device 10, and the controller 21 controls the first pressure relief valve 16 to open for pressure relief. When the pressure in the solid-state hydrogen storage device 11 is abnormal, the third pressure sensor 19 transmits information to the controller 21, and the controller 21 controls the third one-way solenoid valve 12 to close, and controls the third pressure relief valve 20 to open for pressure relief.

[0037] The solid-state hydrogen storage and fuel cell hydrogen recycling system includes a hydrogen charging process and a hydrogen decharging process during operation.

[0038] During the hydrogen charging process, the gas discharged from the fuel cell system 1 contains hydrogen and water vapor. The exhaust gas passes through the dehumidification system 2 to remove excess water vapor. The dry-wet sensing component in the dehumidification system 2 transmits a signal to the controller 21. The controller 21 determines whether the hydrogen is dry based on the received signal. The dry hydrogen enters the boosting system 3 and increases the hydrogen to a set pressure. The pressure sensor in the boosting system 3 transmits a signal to the controller 21. The controller 21 controls the first one-way solenoid valve 4 to open, and the dry hydrogen passes through the first flowmeter 5 to enter the gas buffer tank 6 for temporary storage. When the pressure in the gas buffer tank 6 reaches the set pressure value and the pressure gauge 14 displays the set pressure value, the first pressure sensor 15 transmits a signal to the controller 21, and the controller 21 controls the second one-way solenoid valve 7 to open, and the dry hydrogen passes through the pressure reducing valve 8 and the second flowmeter 9 to enter the solid hydrogen storage recovery device 10 for storage. When the pressure in the solid-state hydrogen storage recovery device 10 is equal to that in the gas buffer tank 6, that is, the first pressure sensor 15 and the second pressure sensor 17 transmit signals to the controller 21, and the controller 21 controls the second one-way solenoid valve 7 to close, and the first one-way solenoid valve 4 remains open; when the hydrogen pressure in the gas buffer tank 6 reaches the set value again, the second pressure sensor 17 transmits a signal to the controller 21, and the controller 21 controls the second one-way solenoid valve 7 to open, and the hydrogen in the gas buffer tank 6 continues to flow into the solid-state hydrogen storage recovery device 10. When the pressure in the solid-state hydrogen storage recovery device 10 reaches the pressure value of the theoretical hydrogen filling amount, the second pressure sensor 17 transmits a signal to the controller 21, and the controller 21 controls the second one-way solenoid valve 7 to close, and the first pressure relief valve 16 to open, and the hydrogen that continues to flow into the gas buffer tank 6 is emptied through the first pressure relief valve 16.

[0039] During the hydrogen release process, the solid-state hydrogen storage device 11 maintains a continuous hydrogen release state in both the hydrogen release stage and the hydrogen charging stage, and hydrogen enters the fuel cell system 1 from the hydrogen outlet of the solid-state hydrogen storage device 11 through the fourth one-way solenoid valve 13. When the pressure inside the solid-state hydrogen storage device 11 decreases, and its internal pressure is less than the pressure of the solid-state hydrogen storage recovery device 10, the second pressure sensor 17 and the third pressure sensor 19 transmit information to the controller 21, and the controller 21 controls the third one-way solenoid valve 12 to open, and the solid-state hydrogen storage recovery device 10 releases hydrogen. After the hydrogen passes through the third one-way solenoid valve 12, it merges with the hydrogen flowing out of the fourth one-way solenoid valve 13 and then enters the fuel cell system 1. After the solid-state hydrogen storage recovery device 10 releases hydrogen, the amount of hydrogen inside it decreases, and the second pressure sensor 17 transmits information to the controller 21, and the controller 21 controls the second one-way solenoid valve 7 to open, and the hydrogen in the gas buffer tank 6 continues to flow into the solid-state hydrogen storage recovery device 10.

[0040] This embodiment also discloses a solid-state hydrogen storage and fuel cell hydrogen recycling method, which uses the above-mentioned solid-state hydrogen storage and fuel cell hydrogen recycling system, including a hydrogen charging process and a hydrogen degassing process.

[0041] Hydrogen charging process: the fuel cell system 1 discharges exhaust gas, the dehumidification system 2 performs gas-liquid separation on the exhaust gas, the dry hydrogen enters the boosting system 3 for boosting, the boosted hydrogen enters the gas buffer tank 6 for buffering and then enters the solid hydrogen storage recovery device 10 for storage.

[0042] Hydrogen release process: The solid-state hydrogen storage device 11 maintains a continuous hydrogen release state during the hydrogen charging process and the hydrogen release process; when the pressure inside the solid-state hydrogen storage device 11 is lower than the pressure inside the solid-state hydrogen storage recovery device 10, the solid-state hydrogen storage recovery device 10 releases hydrogen to the fuel cell system 1.

[0043] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A solid-state hydrogen storage and fuel cell hydrogen recycling system, Features: It includes a fuel cell system, a solid-state hydrogen storage recovery device, a solid-state hydrogen storage device, and a controller; A dehumidification system, a pressurization system, a first one-way solenoid valve, a gas buffer tank, and a second one-way solenoid valve are sequentially installed and connected between the exhaust gas outlet of the fuel cell system and the hydrogen inlet of the solid-state hydrogen storage recovery device; under the control of the controller, the hydrogen in the exhaust gas passes through the dehumidification system, the pressurization system, the first one-way solenoid valve, the gas buffer tank, and the second one-way valve, and is stored in the solid-state hydrogen storage recovery device; The hydrogen outlet of the solid-state hydrogen storage recovery device is installed with a third one-way solenoid valve and is connected to the hydrogen inlet of the fuel cell system; the hydrogen outlet of the solid-state hydrogen storage device is installed with a fourth solenoid one-way valve and is connected to the hydrogen inlet of the fuel cell system; under the control of the controller, the solid-state hydrogen storage recovery device and the solid-state hydrogen storage device can release hydrogen into the fuel cell system.

2. A solid-state hydrogen storage and fuel cell hydrogen recycling system according to claim 1, Features: A first flow meter is installed between the first one-way solenoid valve and the hydrogen inlet of the gas buffer tank. The first flow meter is connected to the controller signal, and the controller can display the total amount of hydrogen entering the gas buffer tank.

3. A solid-state hydrogen storage and fuel cell hydrogen recycling system according to claim 1, Features: A pressure reducing valve is installed between the second one-way solenoid valve and the hydrogen inlet of the solid-state hydrogen storage recovery device.

4. A solid-state hydrogen storage and fuel cell hydrogen recycling system according to claim 3, Features: A second flow meter is installed between the pressure reducing valve and the hydrogen inlet of the solid-state hydrogen storage recovery device. The second flow meter is connected to the controller signal, and the controller can display the total amount of hydrogen entering the solid-state hydrogen storage recovery device.

5. A solid-state hydrogen storage and fuel cell hydrogen recycling system according to claim 1, Features: The gas buffer tank is equipped with a first pressure sensor and a first pressure relief valve, wherein the first pressure sensor is used to detect the pressure value in the gas buffer tank, and the first pressure relief valve can relieve the pressure of the gas buffer tank; the first pressure sensor and the first pressure relief valve are respectively connected to the controller by signals; The controller can control whether the first pressure relief valve is opened according to information transmitted by the first pressure sensor.

6. A solid-state hydrogen storage and fuel cell hydrogen recycling system according to claim 1, Features: The solid-state hydrogen storage recovery device is equipped with a second pressure sensor and a second pressure relief valve. The second pressure sensor is used to monitor the pressure value in the solid-state hydrogen storage recovery device, and the second pressure relief valve can relieve the pressure of the solid-state hydrogen storage recovery device; the second pressure sensor and the second pressure relief valve are respectively connected to the controller by signal; the controller can control whether the second pressure relief valve is opened according to the information transmitted by the second pressure sensor.

7. A solid-state hydrogen storage and fuel cell hydrogen recycling system according to claim 1, Features: The solid-state hydrogen storage device is equipped with a third pressure sensor and a third pressure relief valve. The third pressure sensor is used to monitor the pressure value in the solid-state hydrogen storage device, and the third pressure relief valve can relieve the pressure of the solid-state hydrogen storage device; the third pressure sensor and the third pressure relief valve are respectively connected to the controller by signal; the controller can control whether the third pressure relief valve is opened according to the information transmitted by the third pressure sensor.

8. A solid-state hydrogen storage and fuel cell hydrogen recycling system according to claim 1, Features: It also includes a hydrogen detector, which is connected to the controller signal. The controller controls whether the solid-state hydrogen storage and fuel cell hydrogen recycling system stops running according to the information transmitted by the hydrogen detector.

9. A solid-state hydrogen storage and fuel cell hydrogen recycling system according to claim 1, Features: The outlet of the third one-way solenoid valve is connected to the hydrogen inlet of the fuel cell system after merging with the outlet of the fourth one-way solenoid valve.

10. A solid-state hydrogen storage and fuel cell hydrogen recycling method, Features: A solid-state hydrogen storage and fuel cell hydrogen recycling system using any one of claims 1 to 9, including a hydrogen charging process and a hydrogen discharging process; Hydrogen filling process: The fuel cell system discharges exhaust gas, the dehumidification system separates the exhaust gas into gas and liquid, the dry hydrogen enters the boosting system for boosting, the boosted hydrogen enters the gas buffer tank for buffering, and then enters the solid hydrogen storage recovery device for storage; Hydrogen release process: The solid-state hydrogen storage device continuously releases hydrogen; when the pressure inside the solid-state hydrogen storage device is lower than the pressure inside the solid-state hydrogen storage recovery device, the solid-state hydrogen storage recovery device releases hydrogen to the fuel cell system.

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