Hydrogen energy electric vehicle integrating water electrolysis and hydrogen production

Abstract

The utility model belongs to the field of electric vehicles, and particularly relates to a hydrogen energy electric vehicle integrating water electrolysis and hydrogen production, when the hydrogen energy electric vehicle is not ridden, a water electrolysis and hydrogen production tank can be powered by a power adapter through mains supply, and generated hydrogen is stored in a solid hydrogen storage bottle to supplement hydrogen energy; during riding, hydrogen stored in the solid hydrogen storage bottle is utilized to generate electric energy through the hydrogen fuel cell stack, and power is provided for the driving motor. Through the design, the electrolytic water hydrogen production tank is matched with the solid hydrogen storage bottle, hydrogen energy is conveniently supplemented, the hydrogen bottle does not need to be replaced or a hydrogen refueling station is not needed for hydrogenation, use is convenient, and the use cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to a hydrogen-powered electric vehicle that integrates water electrolysis to produce hydrogen. Background Art

[0002] A fuel cell is an electrochemical device that converts the chemical energy of a fuel directly into energy. It usually uses fuel and oxygen / air as raw materials. In a hydrogen fuel cell, hydrogen is introduced into the negative electrode, and oxygen / air is introduced into the positive electrode. Hydrogen and oxygen react to produce water. During this process, the charge is returned from the external circuit to the air electrode and participates in the reaction of the air electrode. Thus, a series of reactions promote the uninterrupted flow of electrons through the external circuit, thus forming power generation.

[0003] In the prior art, hydrogen fuel cell technology has been applied to electric power-assisted bicycles, and hydrogen fuel cell electric power-assisted bicycles have been launched. When the hydrogen storage container (usually a hydrogen cylinder) is used up for a period of time, it needs to be replaced. However, hydrogen energy refueling now requires a special hydrogen refueling gun. Refueling hydrogen without a special hydrogen refueling gun will cause great safety hazards, and now hydrogen refueling stations do not have the conditions to refuel micro hydrogen storage tanks. At the same time, due to the imperfect infrastructure of surrounding hydrogen energy refueling stations and the high cost of building hydrogen energy hydrogen refueling stations, it is extremely difficult to meet the demand for hydrogen energy replenishment on a universal basis, resulting in a very high cost of using hydrogen energy, which in turn makes hydrogen-powered electric bicycles difficult to promote and popularize. Utility Model Content

[0004] The embodiment of the present application provides a hydrogen-powered electric vehicle that integrates water electrolysis to produce hydrogen, which is used to solve the technical problems in the prior art that hydrogen fuel cell electric power-assisted vehicles are inconvenient to replenish hydrogen energy and have high usage costs.

[0005] To achieve the above-mentioned purpose, the present application provides a hydrogen-powered electric vehicle integrating water electrolysis and hydrogen production, including a vehicle body, a water tank, a water electrolysis hydrogen production tank, a power adapter, a solid-state hydrogen storage bottle, a hydrogen fuel cell stack, an air pump, and a motor controller;

[0006] The vehicle body includes a frame, a front wheel rotatably arranged on the frame, a rear wheel rotatably arranged on the frame, and a driving motor for driving the rear wheel to rotate; the water tank, the water electrolysis hydrogen production tank, the solid-state hydrogen storage bottle and the hydrogen fuel cell stack are all installed on the frame, the water outlet of the water tank is connected to the water inlet of the water electrolysis hydrogen production tank, and the water electrolysis hydrogen production tank has an external power supply interface; the power adapter is used to connect the mains power to the external power supply interface to provide working power to the water electrolysis hydrogen production tank; a three-way valve is connected to the bottle mouth of the solid-state hydrogen storage bottle, the air inlet interface of the three-way valve is connected to the hydrogen outlet of the water electrolysis hydrogen production tank, and the air outlet interface of the three-way valve is connected to the hydrogen inlet of the hydrogen fuel cell stack; the air pump is arranged on the oxygen inlet of the hydrogen fuel cell stack, and is used to transport air to the inside of the hydrogen fuel cell stack; the power output end of the hydrogen fuel cell stack is electrically connected to the driving motor through the motor controller.

[0007] Optionally, the air inlet interface and the air outlet interface of the three-way valve are not opened at the same time. When the air inlet interface is opened and hydrogen is stored in the solid-state hydrogen storage bottle, the air outlet interface is closed; when the air inlet interface is closed, the air outlet interface is opened, and the hydrogen stored in the solid-state hydrogen storage bottle is output to the hydrogen fuel cell stack.

[0008] Optionally, a pressure reducing valve is provided on the gas outlet interface of the three-way valve, and the pressure reducing valve is connected to the hydrogen inlet of the hydrogen fuel cell stack through a hydrogen transmission pipe.

[0009] Optionally, the hydrogen outlet of the water electrolysis hydrogen production tank is connected to the gas inlet interface of the three-way valve through a hydrogen pipe, and a gas-water separator and a hydrogen dryer are sequentially connected in series on the hydrogen pipe along the gas transportation direction.

[0010] Optionally, the water electrolysis hydrogen production tank is a PEM water electrolysis hydrogen production tank or an AEM water electrolysis hydrogen production tank.

[0011] Optionally, the power of the water electrolysis hydrogen production cell is 200W-400W.

[0012] Optionally, the hydrogen-powered electric vehicle further includes an auxiliary power lithium battery and a BMS electrically connected to the auxiliary power lithium battery, the BMS is electrically connected to the motor controller, and the auxiliary power lithium battery is used to provide auxiliary power for the drive motor and / or provide starting power for the hydrogen fuel cell stack.

[0013] Optionally, the power output ends of the BMS and the hydrogen fuel cell stack are electrically connected to the motor controller via a DC-DC converter.

[0014] Optionally, a seat cushion is provided above the frame, the water tank is arranged below the seat cushion, a containing box is provided on the frame between the seat cushion and the front wheel, the water electrolysis hydrogen production tank and the hydrogen fuel cell stack are both installed in the containing box, and the solid-state hydrogen storage bottle is detachably installed on the frame behind the seat cushion.

[0015] Optionally, the vehicle body includes a rear wheel, the drive motor includes a hub motor, and the hub motor is integrated on the rear wheel; or

[0016] The vehicle body comprises two rear wheels, which are connected via a drive shaft, and the drive motor is arranged on the vehicle frame and connected to the drive shaft via a transmission mechanism.

[0017] The beneficial effect of the hydrogen-powered electric vehicle provided by the present application, which integrates the electrolysis of water and hydrogen production, is that compared with the prior art, the hydrogen-powered electric vehicle of the present application is provided with an electrolysis of water hydrogen production tank on the vehicle body, and is equipped with a power adapter that can use the city electricity to provide a working power supply for the electrolysis of water hydrogen production tank. The hydrogen prepared by the electrolysis of water hydrogen production tank is stored in a solid-state hydrogen storage bottle. When riding, the hydrogen fuel cell stack uses the hydrogen stored in the solid-state hydrogen storage bottle to generate electricity, which is supplied to the driving motor in the vehicle body to drive the rear wheels to rotate, thereby realizing the forward movement of the hydrogen-powered electric vehicle. When the hydrogen-powered electric vehicle is not riding, the power adapter can be used to power the electrolysis of water hydrogen production tank through the city electricity, and the generated hydrogen is stored in the solid-state hydrogen storage bottle to replenish hydrogen energy; when riding, the hydrogen stored in the solid-state hydrogen storage bottle is used to generate electricity through the hydrogen fuel cell stack to provide power for the driving motor. Thus, the design uses the electrolysis of water hydrogen production tank and the solid-state hydrogen storage bottle to cooperate, which is convenient for replenishing hydrogen energy, without the need to replace the hydrogen bottle or go to the hydrogen filling station to refuel, which is safe and convenient to use, and reduces the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] in:

[0020] Figure 1 It is a schematic structural diagram of a hydrogen-powered electric vehicle integrating water electrolysis and hydrogen production according to an embodiment of the present application;

[0021] Figure 2 It is a schematic diagram of a hydrogen-powered electric vehicle that integrates water electrolysis to produce hydrogen, as shown in one embodiment of the present application.

[0022] Description of main component symbols:

[0023] 100, vehicle body; 101, vehicle frame; 102, front wheel; 103, rear wheel; 104, drive motor; 105, seat cushion;

[0024] 200, water tank; 210, water quality alarm; 220, low water level alarm;

[0025] 300. Water electrolysis hydrogen production tank; 310. External power supply interface;

[0026] 400, power adapter;

[0027] 500, solid hydrogen storage bottle; 510, three-way valve; 511, pressure reducing valve;

[0028] 600. Hydrogen fuel cell stack; 610. Air pump;

[0029] 700, motor controller;

[0030] 800, auxiliary power lithium battery; 810, BMS;

[0031] 900, DC-DC converter;

[0032] 10. Water pipe; 11. Water filter;

[0033] 20. Hydrogen pipe; 21. Gas-water separator; 22. Hydrogen dryer;

[0034] 30. Return pipe;

[0035] 40. Hydrogen transmission pipe;

[0036] 50. Cooling fan. DETAILED DESCRIPTION

[0037] In order to facilitate the understanding of the present application, the present application will be described more comprehensively with reference to the relevant drawings below. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many other different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0038] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0039] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0041] As described in the background technology, in the prior art, when the hydrogen storage container (usually a hydrogen cylinder) of a hydrogen fuel cell electric assisted bicycle is exhausted after a period of use, it needs to be replaced. However, in the early stage of the popularization of hydrogen energy, due to the imperfect surrounding infrastructure, the demand for hydrogen energy replenishment is difficult to be universally met, resulting in a high cost of using hydrogen energy.

[0042] In order to solve the above problems, the embodiments of the present application provide a hydrogen-powered electric vehicle that integrates water electrolysis to produce hydrogen, such as Figure 1 As shown, the hydrogen-powered electric vehicle comprises a vehicle body 100, a water tank 200, a water electrolysis hydrogen production tank 300, a power adapter 400, a solid-state hydrogen storage bottle 500, a hydrogen fuel cell stack 600, an air pump 610 and a motor controller 700. The vehicle body 100 comprises a vehicle frame 101, a front wheel 102 rotatably arranged on the vehicle frame 101, a rear wheel 103 rotatably arranged on the vehicle frame 101 and a driving motor 104 for driving the rear wheel 103 to rotate. The water tank 200, the water electrolysis hydrogen production tank 300, the solid-state hydrogen storage bottle 500 and the hydrogen fuel cell stack 600 are all mounted on the vehicle frame 101, and the water outlet of the water tank 200 is connected to the water inlet of the water electrolysis hydrogen production tank 300 through a water pipe 10, and the water electrolysis hydrogen production tank 300 has an external power supply interface 310. The power adapter 400 is used to connect the mains power to the external power interface 310 to provide working power to the water electrolysis hydrogen production tank 300. A three-way valve 510 is connected to the bottle mouth of the solid-state hydrogen storage bottle 500, and the air inlet interface of the three-way valve 510 is connected to the hydrogen outlet of the water electrolysis hydrogen production tank 300, and the air outlet interface of the three-way valve 510 is connected to the hydrogen inlet of the hydrogen fuel cell stack 600. The air pump 610 is arranged on the oxygen inlet of the hydrogen fuel cell stack 600, and is used to transport air to the inside of the hydrogen fuel cell stack 600. The power output end of the hydrogen fuel cell stack 600 is electrically connected to the drive motor 104 through the motor controller 700.

[0043] Among them, the solid-state hydrogen storage bottle 500 is an existing technology, which uses solid-state alloy hydrogen storage technology and has the advantages of high hydrogen storage density, low operating pressure, and good safety. The principle is that under certain temperature and pressure conditions, metals capture hydrogen atoms to generate stable metal hydrides. Afterwards, the metal hydride is excited by heating to decompose the metal hydride, thereby releasing hydrogen. These metals that can absorb and release hydrogen are called hydrogen storage alloys. Commonly used hydrogen storage alloys are rare earth, titanium, zirconium, and magnesium. They are divided into four categories according to the atomic ratio of the main constituent elements: AB5 type, AB2 type, AB type, and A2B type.

[0044] In the embodiment of the present application, the hydrogen-powered electric vehicle is provided with a water electrolysis hydrogen production tank 300 on the vehicle body 100, and is equipped with an AC-to-DC power adapter 400 that can use the mains (110V-220V) to provide working power for the water electrolysis hydrogen production tank 300. The hydrogen prepared by the water electrolysis hydrogen production tank 300 is stored in a solid-state hydrogen storage bottle 500. When riding, the hydrogen fuel cell stack 600 uses the hydrogen stored in the solid-state hydrogen storage bottle 500 to generate electricity, which is supplied to the driving motor 104 in the vehicle body 100 to drive the rear wheel 103 to rotate, thereby realizing the forward movement of the hydrogen-powered electric vehicle. When the hydrogen-powered electric vehicle is not riding, the water electrolysis hydrogen production tank 300 can be powered by the power adapter 400 through the mains, and the generated hydrogen can be stored in the solid-state hydrogen storage bottle 500 to supplement hydrogen energy; when riding, the hydrogen stored in the solid-state hydrogen storage bottle 500 is used to generate electricity through the hydrogen fuel cell stack 600 to provide power for the driving motor 104. According to this design, the electrolytic water hydrogen production tank 300 and the solid hydrogen storage bottle 500 are used in combination to facilitate the replenishment of hydrogen energy. There is no need to replace the hydrogen cylinder or go to a hydrogen filling station to fill up hydrogen, which is convenient to use and reduces the cost of use.

[0045] In addition, it is understandable that in urban areas, the hydrogen-powered electric vehicle can directly use the electric bicycle charging piles in the existing parking shed to power the water electrolysis hydrogen production tank 300 to prepare hydrogen, which is easy to use and makes full use of the existing electric bicycle charging piles.

[0046] It should be noted that the solid-state hydrogen storage bottle 500 can generally release hydrogen better at 20°C-60°C. Therefore, in one embodiment, a temperature control device (not shown in the figure) is also provided on the outside of the solid-state hydrogen storage bottle 500, which is used to adjust the solid-state hydrogen storage bottle 500 to a suitable temperature when the temperature is low (such as in winter) and high (such as in summer) to facilitate the release of hydrogen.

[0047] In one embodiment, if Figure 1 and Figure 2 As shown, the air inlet interface and the air outlet interface of the three-way valve 510 are not opened at the same time. When the air inlet interface is opened and hydrogen is stored in the solid-state hydrogen storage bottle 500, the air outlet interface is closed; when the air inlet interface is closed, the air outlet interface is opened, and the hydrogen stored in the solid-state hydrogen storage bottle 500 is output to the hydrogen fuel cell stack 600.

[0048] That is, during the process of hydrogen production in the water electrolysis hydrogen production tank 300, the air inlet interface of the three-way valve 510 is opened and the air outlet interface is closed, and the prepared hydrogen is stored in the solid-state hydrogen storage bottle 500; during riding, the air inlet interface of the three-way valve 510 is closed and the air outlet interface is opened, and the hydrogen stored in the solid-state hydrogen storage bottle 500 is output to the hydrogen fuel cell stack 600 to generate electricity.

[0049] Specifically, the three-way valve 510 is a three-way solenoid valve, which can be powered by a battery in the vehicle body 100 and controlled by a main controller.

[0050] In one embodiment, if Figure 1 As shown, a pressure reducing valve 511 is provided on the outlet interface of the three-way valve 510, and the pressure reducing valve 511 is connected to the hydrogen inlet of the hydrogen fuel cell stack 600 through the hydrogen delivery pipe 40. The pressure reducing valve 511 is provided to ensure that the hydrogen in the solid hydrogen storage bottle 500 is stably output to the hydrogen fuel cell stack 600.

[0051] In one embodiment, if Figure 1 As shown, the hydrogen outlet of the water electrolysis hydrogen production tank 300 is connected to the gas inlet interface of the three-way valve 510 through the hydrogen pipe 20, and the hydrogen pipe 20 is sequentially connected in series with a gas-water separator 21 and a hydrogen dryer 22 in the gas delivery direction. By providing the gas-water separator 21 and the hydrogen dryer 22, the purity of the hydrogen is improved.

[0052] Preferably, the gas-water separator 21 is a two-stage gas-water separator, and the hydrogen dryer 22 is a two-stage hydrogen dryer.

[0053] Furthermore, the water separated by the gas-water separator 21 is transported to the water tank 200 via the return pipe 30 for repeated use.

[0054] In one embodiment, if Figure 1 As shown, the water electrolysis hydrogen production cell 300 is a PEM water electrolysis hydrogen production cell or an AEM water electrolysis hydrogen production cell.

[0055] It should be noted that PEM water electrolysis hydrogen production tank and AEM water electrolysis hydrogen production tank are existing technologies. Their working principle is that water molecules are first decomposed into oxygen and hydrogen ions (H+) under the catalytic action of anode catalysts (such as precious metal iridium catalysts), and then H+ passes through the PEM membrane between the cathode and the cathode, and then generates hydrogen under the catalysis of cathode catalysts (such as precious metal platinum catalysts). Since the hydrogen produced at the cathode and the oxygen produced at the anode are separated by the proton membrane, the hydrogen produced by PEM and AEM water electrolysis is of high purity (>99.99%). This technology has the advantages of high energy conversion efficiency, fast response speed, and small footprint, and is a green and efficient hydrogen production technology.

[0056] The PEM water electrolysis hydrogen production tank and the AEM water electrolysis hydrogen production tank can directly produce 3.5MPa of hydrogen, while the working pressure of the solid-state hydrogen storage bottle 500 is generally 0.1MPa-4MPa. The hydrogen produced by the PEM water electrolysis hydrogen production tank and the AEM water electrolysis hydrogen production tank can be directly added to the solid-state hydrogen storage bottle 500.

[0057] In a specific embodiment, the power of the water electrolysis hydrogen production tank 300 is 200 W-400 W. With this configuration, the power adapter 400 can directly use the existing electric bicycle charger and is within the tolerance range of the existing electric bicycle charging pile.

[0058] In one embodiment, if Figure 1 As shown, a water filter 11 is connected in series to the water delivery pipe 10 to ensure the cleanliness of the water delivered to the electrolytic water hydrogen production tank 300 and to improve the service life of the electrolytic water hydrogen production tank 300. A water quality alarm 210 for monitoring water quality and a low water level alarm 220 for monitoring water level are also provided in the water tank 200, and a cooling fan 50 for dissipating heat is also provided near the hydrogen fuel cell stack 600.

[0059] In some embodiments, Figure 1-Figure 2 As shown, the hydrogen-powered electric vehicle further includes an auxiliary power lithium battery 800 and a BMS 810 (Battery Management System) electrically connected to the auxiliary power lithium battery 800. The BMS 810 is electrically connected to the motor controller 700. The auxiliary power lithium battery 800 is used to provide auxiliary power to the drive motor 104. When the power provided by the hydrogen fuel cell stack 600 alone cannot meet the demand during acceleration or climbing, the auxiliary power lithium battery 800 is used to supplement the power for a short time. The auxiliary power lithium battery 800 can also provide power for other electrical equipment on the hydrogen-powered electric vehicle (such as the air pump 610, the three-way solenoid valve, the water quality alarm 210, the low water level alarm 220, and the cooling fan 50, etc.).

[0060] Specifically, in one implementation, the auxiliary power lithium battery 800 may be replaceable. Of course, in another implementation, the BMS 810 may be electrically connected to the external power interface 310, and when hydrogen is produced by electrolyzing water, the auxiliary power lithium battery 800 may be charged through the power adapter 400 and / or a starting power supply may be provided for the hydrogen fuel cell stack 600.

[0061] In some specific embodiments, Figure 1 and Figure 2 As shown, the power output terminals of the BMS 810 and the hydrogen fuel cell stack 600 are both electrically connected to the motor controller 700 through a DC-DC converter 900 , wherein the DC-DC converter 900 is used for voltage boosting and voltage stabilization functions.

[0062] In one embodiment, if Figure 1 As shown, a seat cushion 105 is provided above the frame 101, a water tank 200 is arranged below the seat cushion 105, a containing box is provided on the frame 101 between the seat cushion 105 and the front wheel 102, a water electrolysis hydrogen production tank 300, a hydrogen fuel cell stack 600, an auxiliary power lithium battery 800, a BMS 810 and a DC-DC converter 900 are all installed in the containing box, and a solid-state hydrogen storage bottle 500 is detachably installed on the frame 101 behind the seat cushion 105 to facilitate its replacement.

[0063] Finally, it should be noted that the hydrogen-powered electric vehicle in this application may be a hydrogen-powered electric bicycle / two-wheeled vehicle (such as Figure 1 As shown), it can also be a hydrogen-powered electric tricycle. When it is a hydrogen-powered electric bicycle, as shown Figure 1 As shown, the vehicle body 100 includes a rear wheel 103, and the drive motor 104 includes a hub motor, which is integrated on the rear wheel 103; when it is a hydrogen-powered electric tricycle, not shown in the figure, the vehicle body includes two rear wheels, which are connected by a drive shaft, and the drive motor is arranged on the frame and connected to the drive shaft through a transmission mechanism (such as a chain drive).

[0064] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A hydrogen-powered electric vehicle integrating water electrolysis to produce hydrogen, characterized in that: It includes a vehicle body, a water tank, a water electrolysis hydrogen production tank, a power adapter, a solid-state hydrogen storage bottle, a hydrogen fuel cell stack, an air pump and a motor controller; The vehicle body includes a frame, a front wheel rotatably arranged on the frame, a rear wheel rotatably arranged on the frame, and a driving motor for driving the rear wheel to rotate; the water tank, the water electrolysis hydrogen production tank, the solid-state hydrogen storage bottle and the hydrogen fuel cell stack are all installed on the frame, the water outlet of the water tank is connected to the water inlet of the water electrolysis hydrogen production tank, and the water electrolysis hydrogen production tank has an external power supply interface; the power adapter is used to connect the mains power to the external power supply interface to provide working power to the water electrolysis hydrogen production tank; a three-way valve is connected to the bottle mouth of the solid-state hydrogen storage bottle, the air inlet interface of the three-way valve is connected to the hydrogen outlet of the water electrolysis hydrogen production tank, and the air outlet interface of the three-way valve is connected to the hydrogen inlet of the hydrogen fuel cell stack; the air pump is arranged on the oxygen inlet of the hydrogen fuel cell stack, and is used to transport air to the inside of the hydrogen fuel cell stack; the power output end of the hydrogen fuel cell stack is electrically connected to the driving motor through the motor controller.

2. The hydrogen-powered electric vehicle according to claim 1, characterized in that: The air inlet interface and the air outlet interface of the three-way valve are not opened at the same time. When the air inlet interface is opened and hydrogen is stored in the solid-state hydrogen storage bottle, the air outlet interface is closed; when the air inlet interface is closed, the air outlet interface is opened, and the hydrogen stored in the solid-state hydrogen storage bottle is output to the hydrogen fuel cell stack.

3. The hydrogen-powered electric vehicle according to claim 1, characterized in that: The gas outlet interface of the three-way valve is provided with a pressure reducing valve, and the pressure reducing valve is connected to the hydrogen inlet of the hydrogen fuel cell stack through a hydrogen transmission pipe.

4. The hydrogen-powered electric vehicle according to claim 1, characterized in that: The hydrogen outlet of the water electrolysis hydrogen production tank is connected to the gas inlet interface of the three-way valve through a hydrogen pipe, and a gas-water separator and a hydrogen dryer are sequentially connected in series on the hydrogen pipe along the gas conveying direction.

5. The hydrogen-powered electric vehicle according to claim 1, characterized in that: The water electrolysis hydrogen production tank is a PEM water electrolysis hydrogen production tank or an AEM water electrolysis hydrogen production tank.

6. The hydrogen-powered electric vehicle according to claim 1, characterized in that: The power of the water electrolysis hydrogen production tank is 200W-400W.

7. The hydrogen-powered electric vehicle according to claim 1, characterized in that: The hydrogen-powered electric vehicle further comprises an auxiliary power lithium battery and a BMS electrically connected to the auxiliary power lithium battery, wherein the BMS is electrically connected to the motor controller, and the auxiliary power lithium battery is used to provide auxiliary power for the drive motor and / or to provide starting power for the hydrogen fuel cell stack.

8. The hydrogen-powered electric vehicle according to claim 7, characterized in that: The power output ends of the BMS and the hydrogen fuel cell stack are both electrically connected to the motor controller through a DC-DC converter.

9. The hydrogen-powered electric vehicle according to claim 1, characterized in that: A seat cushion is provided above the frame, the water tank is arranged below the seat cushion, a containing box is provided on the frame between the seat cushion and the front wheel, the water electrolysis hydrogen production tank and the hydrogen fuel cell stack are both installed in the containing box, and the solid-state hydrogen storage bottle is detachably installed on the frame behind the seat cushion.

10. The hydrogen-powered electric vehicle according to any one of claims 1 to 9, characterized in that: The vehicle body includes a rear wheel, the drive motor includes a hub motor, and the hub motor is integrated on the rear wheel; or The vehicle body includes two rear wheels, which are connected via a drive shaft. The drive motor is arranged on the vehicle frame and connected to the drive shaft via a transmission mechanism.

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