Hydrogen supply device of fuel cell

Abstract

The utility model provides a hydrogen supply device of a fuel cell, and particularly relates to the field of gas delivery. The hydrogen supply device of the fuel cell comprises a hydrogen production device, a solid hydrogen storage device, a hydrogen storage tank, a pipeline assembly and a controller. The solid hydrogen storage device is respectively communicated with the hydrogen production device and the fuel cell; the hydrogen storage tank is respectively communicated with the hydrogen production device and the fuel cell; the pipeline assembly is connected with the solid hydrogen storage device, the hydrogen storage tank, the hydrogen production device and the fuel cell, and an electromagnetic valve group is arranged on the pipeline assembly; and the controller is electrically connected with the electromagnetic valve group. According to the hydrogen supply device, switching of the electromagnetic valve group is controlled through the controller, so that the hydrogen storage tank and the solid hydrogen storage device are matched to be used in the shutdown process of the fuel cell, and due to matching of the hydrogen storage tank, the solid hydrogen storage device does not need to keep a high pressure threshold value to shut down the fuel cell; therefore, the hydrogen utilization rate in the solid hydrogen storage device can be improved.

Description

Technical Field

[0001] The utility model relates to the field of gas transportation, in particular to a hydrogen supply device for a fuel cell. Background Art

[0002] Fuel cells are a new type of power generation device that can convert the chemical energy of fuel into electrical energy. As a new type of energy utilization method that has developed rapidly in recent years, it has gradually come into practical use in recent years. In particular, hydrogen fuel cells have the advantages of high power generation efficiency and low environmental pollution, and are increasingly valued by people. At present, hydrogen storage technologies mainly include compression, liquid, chemical adsorption and solid technologies. Solid-state hydrogen storage uses metal hydrides, chemical hydrides or nanomaterials as hydrogen storage carriers to achieve hydrogen storage through chemical adsorption and physical adsorption. Solid-state hydrogen storage has attracted much attention for its advantages such as high hydrogen storage density, high safety and long-term stability. When using a solid-state hydrogen storage device to supply hydrogen to a fuel cell, in order to avoid insufficient hydrogen in the solid-state hydrogen storage device and damage to the fuel cell, a certain pressure of hydrogen must be retained in the solid-state hydrogen storage device before shutting down the fuel cell to ensure that the fuel cell can be shut down smoothly, but this will result in incomplete utilization of the hydrogen in the solid-state hydrogen storage device and a low hydrogen utilization rate. Utility Model Content

[0003] In view of the above shortcomings of the prior art, the utility model provides a hydrogen supply device for a fuel cell to improve the problem of low hydrogen utilization rate in a solid hydrogen storage tank device.

[0004] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a hydrogen supply device for a fuel cell, which includes a hydrogen production device, a solid-state hydrogen storage device, a hydrogen storage tank, a pipeline assembly and a controller. The solid-state hydrogen storage device is connected to the hydrogen production device and the fuel cell respectively; the hydrogen storage tank is connected to the hydrogen production device and the fuel cell respectively; the pipeline assembly connects the solid-state hydrogen storage device, the hydrogen storage tank, the hydrogen production device and the fuel cell, and a solenoid valve group is provided on the pipeline assembly; the controller is electrically connected to the solenoid valve group; wherein, when the pressure value in the solid-state hydrogen storage device is greater than a set threshold, the controller controls the solid-state hydrogen storage device to be connected to the fuel cell through the solenoid valve group, and controls the disconnection between the hydrogen storage tank and the fuel cell; when the pressure value in the solid-state hydrogen storage device is less than the set threshold, the controller controls the connection between the hydrogen storage tank and the fuel cell.

[0005] In an example of the present utility model, the pipeline assembly includes a first pipeline, a second pipeline, a third pipeline and a fourth pipeline; one end of the first pipeline is connected to the hydrogen production device, and the other end is connected to the solid-state hydrogen storage device; one end of the second pipeline is connected to the hydrogen production device, and the other end is connected to the hydrogen storage tank; one end of the third pipeline is connected to the solid-state hydrogen storage device, and the other end is connected to the fuel cell; one end of the fourth pipeline is connected to the hydrogen storage tank, and the other end is connected to the fuel cell.

[0006] In an example of the present invention, a first solenoid valve is provided on the first pipeline, a second solenoid valve is provided on the second pipeline, and a third solenoid valve is provided on the third pipeline. The first solenoid valve, the second solenoid valve and the third solenoid valve are electrically connected to the controller respectively.

[0007] In an example of the present invention, the first solenoid valve is a throttle valve, and the third solenoid valve is a pressure reducing valve.

[0008] In an example of the present invention, the pipeline assembly further includes a first branch, and the first branch is connected in parallel to the third pipeline.

[0009] In an example of the present invention, a temperature detection device is provided on the third pipeline, the temperature detection device is located after the junction of the third pipeline and the first branch, and the temperature detection device is electrically connected to the controller.

[0010] In an example of the present invention, a first flow meter is provided on the first pipeline, a second flow meter is provided on the third pipeline, the second flow meter is located after the confluence point of the third pipeline and the first branch, and the first flow meter and the second flow meter are electrically connected to the controller respectively.

[0011] In an example of the present invention, the pipeline assembly further includes a second branch, one end of the second branch is connected to the third pipeline, and the other end of the second branch is connected to the fourth pipeline.

[0012] In an example of the present utility model, a first pressure detection device is provided on the solid-state hydrogen storage device, a second pressure detection device is provided on the hydrogen storage tank, and a third pressure detection device is provided on the third pipeline. The first pressure detection device, the second pressure detection device and the third pressure detection device are electrically connected to the controller respectively.

[0013] In an example of the present invention, the fuel cell is electrically connected to the controller.

[0014] The utility model provides a hydrogen supply device for a fuel cell, in which a solid-state hydrogen storage device is connected to a hydrogen production device and a fuel cell respectively through a pipeline assembly, and a hydrogen storage tank is also connected to a hydrogen production device and a fuel cell respectively through a pipeline assembly; when the pressure value in the solid-state hydrogen storage device is greater than a set threshold value, a controller controls the connection between the solid-state hydrogen storage device and the fuel cell through an electromagnetic valve group, and controls the disconnection between the hydrogen storage tank and the fuel cell to put the fuel cell in a normal working state; when the pressure value in the solid-state hydrogen storage device is less than a set threshold value and the fuel cell needs to be shut down, the controller controls the connection between the hydrogen storage tank and the fuel cell, and the hydrogen storage tank and the solid-state hydrogen storage device cooperate in the shutdown process of the fuel cell. Because of the cooperation of the hydrogen storage tank, the solid-state hydrogen storage device does not need to retain a higher pressure threshold value to shut down the fuel cell, so the utilization rate of hydrogen in the solid-state hydrogen storage device can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of a hydrogen supply device of a fuel cell according to the utility model in one embodiment.

[0017] Component number description

[0018] 100, hydrogen production device; 200, solid-state hydrogen storage device; 210, first pressure detection device; 300, hydrogen storage tank; 310, second pressure detection device; 400, pipeline assembly; 410, first pipeline; 411, first flow meter; 420, second pipeline; 430, third pipeline; 431, third pressure detection device; 432, second flow meter; 433, temperature detection device; 440, fourth pipeline; 450, first branch; 460, second branch; 500, solenoid valve group; 510, first solenoid valve; 520, second solenoid valve; 530, third solenoid valve; 540, fourth solenoid valve; 550, fifth solenoid valve; 560, sixth solenoid valve; 570, seventh solenoid valve; 600, fuel cell. DETAILED DESCRIPTION

[0019] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and the features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific implementation schemes, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or under the conditions recommended by the manufacturers.

[0020] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present utility model without substantially changing the technical content.

[0021] See also Figure 1 The utility model provides a hydrogen supply device for a fuel cell, which includes a hydrogen production device 100, a solid-state hydrogen storage device 200, a hydrogen storage tank 300, a pipeline assembly 400 and a controller (not shown in the figure). The solid-state hydrogen storage device 200 is connected to the hydrogen production device 100 and the fuel cell 600 respectively, and the hydrogen storage tank 300 is connected to the hydrogen production device 100 and the fuel cell 600 respectively. The pipeline assembly 400 is provided with a solenoid valve group 500, and the solenoid valve group 500 is electrically connected to the controller. The pipeline assembly 400 connects the solid-state hydrogen storage device 200, the hydrogen storage tank 300, the hydrogen production device 100 and the fuel cell 600, and the pipeline assembly 400 is provided with a solenoid valve group 500. When the pressure value in the solid-state hydrogen storage device 200 is greater than the set threshold, the controller controls the connection between the solid-state hydrogen storage device 200 and the fuel cell 600 through the solenoid valve group 500, and controls the disconnection between the hydrogen storage tank 300 and the fuel cell 600; when the pressure value in the solid-state hydrogen storage device 200 is less than the set threshold and the fuel cell 600 needs to be shut down, the controller controls the connection between the hydrogen storage tank 300 and the fuel cell 600, and the hydrogen storage tank 300 and the solid-state hydrogen storage device 200 cooperate for the shutdown process of the fuel cell 600. Because of the cooperation of the hydrogen storage tank 300, the solid-state hydrogen storage device 200 does not need to retain a higher pressure threshold to shut down the fuel cell 600, so the hydrogen utilization rate in the solid-state hydrogen storage device 200 can be improved.

[0022] See also Figure 1In one embodiment, the pipeline assembly 400 includes a first pipeline 410, a second pipeline 420, a third pipeline 430 and a fourth pipeline 440. One end of the first pipeline 410 is connected to the hydrogen production device 100, and the other end of the first pipeline 410 is connected to the solid hydrogen storage device 200; one end of the second pipeline 420 is connected to the hydrogen production device 100, and the other end of the second pipeline 420 is connected to the hydrogen storage tank 300; one end of the third pipeline 430 is connected to the solid hydrogen storage device 200, and the other end of the third pipeline 430 is connected to the fuel cell 600; one end of the fourth pipeline 440 is connected to the hydrogen storage tank 300, and the other end of the fourth pipeline 440 is connected to the fuel cell 600.

[0023] See also Figure 1 In one embodiment, the solid-state hydrogen storage device 200 is provided with a first air inlet and a first air outlet, the first air inlet is connected to the hydrogen production device 100, and the first air outlet is connected to the fuel cell 600. In this embodiment, the first air inlet and the first air outlet are integrated into a vent, and the first pipeline 410 and the third pipeline 430 are connected to the vent of the solid-state hydrogen storage device 200 through the pipeline after merging near one end of the solid-state hydrogen storage device 200. The selective one-way opening of the vent is achieved by a one-way valve assembly installed on the vent pipeline. When it is necessary to charge the solid-state hydrogen storage device 200 with hydrogen, the controller controls the one-way valve assembly to open in the direction of entering the solid-state hydrogen storage device 200. When it is necessary for the solid-state hydrogen storage device 200 to provide hydrogen for the fuel cell 600, the controller controls the one-way valve assembly to open in the direction away from the solid-state hydrogen storage device 200, so that hydrogen enters the fuel cell 600. In other embodiments, the first air inlet and the first air outlet may be separately provided, and the first air inlet is connected to the first pipeline 410 to realize the connection between the solid-state hydrogen storage device 200 and the hydrogen production device 100, and the first air outlet is connected to the third pipeline 430 to realize the connection between the solid-state hydrogen storage device 200 and the fuel cell 600. In the present application, there is no restriction on the type and hydrogen storage capacity of the solid-state hydrogen storage device 200, and they are adjusted according to actual needs.

[0024] See also Figure 1In one embodiment, a first solenoid valve 510 is provided on the first pipeline 410, and the first solenoid valve 510 is electrically connected to the controller. The controller drives the first solenoid valve 510 to open so that the hydrogen production device 100 can charge hydrogen into the solid hydrogen storage device 200. As the hydrogen storage content in the hydrogen storage material in the solid hydrogen storage device 200 increases, the hydrogen storage capacity of the hydrogen storage material decreases. In order to avoid overcharging of the hydrogen storage material and ensure the cyclic stability of the hydrogen storage material, the first solenoid valve 510 uses a throttle valve to adjust the hydrogen charging rate of the solid hydrogen storage device 200. Specifically, the solid hydrogen storage device 200 is provided with a first pressure detection device 210 for detecting its internal pressure. The first pressure detection device 210 is electrically connected to the controller and sends the detected pressure to the controller. The controller controls the hydrogen flow rate in the first pipeline 410 through the first solenoid valve 510 according to the internal pressure of the solid hydrogen storage device 200 to ensure the uniformity and safety of the reaction of the hydrogen storage material. When the internal pressure of the solid-state hydrogen storage device 200 reaches a preset value, the controller controls the first solenoid valve 510 to close, and stops charging hydrogen into the solid-state hydrogen storage device 200. Furthermore, a first flow meter 411 is also provided on the first pipeline 410, and the first flow meter 411 is electrically connected to the controller and is used to monitor the hydrogen flow rate in the first pipeline 410 in real time. The first flow meter 411 can be set on the air inlet side of the first solenoid valve 510, and can also be set on the air outlet side of the first solenoid valve 510.

[0025] See also Figure 1 In one embodiment, the hydrogen storage tank 300 is provided with a second air inlet and a second air outlet, the second air inlet is connected to the second pipeline 420 to realize the connection between the hydrogen storage tank 300 and the hydrogen production device 100, and the second air outlet is connected to the fourth pipeline 440 to realize the connection between the hydrogen storage tank 300 and the fuel cell 600. A second solenoid valve 520 is provided on the second pipeline 420, and a second pressure detection device 310 is provided on the hydrogen storage tank 300 for detecting its internal pressure. The second solenoid valve 520 and the second pressure detection device 310 are both electrically connected to the controller. The second pressure detection device 310 sends the internal pressure of the hydrogen storage tank 300 to the controller. When the internal pressure of the hydrogen storage tank 300 reaches a preset value, the controller controls the second solenoid valve 520 to close and stop inflating the hydrogen storage tank 300. In this application, there is no restriction on the hydrogen storage capacity of the hydrogen storage tank 300, and it is adjusted according to actual needs.

[0026] See also Figure 1In one embodiment, a third solenoid valve 530 is provided on the third pipeline 430, and the third solenoid valve 530 is a pressure reducing valve. The pressure at the outlet of the third solenoid valve 530 is set within the hydrogen filling pressure range of the fuel cell 600. When the internal pressure of the solid-state hydrogen storage device 200 is higher than the maximum hydrogen filling pressure of the fuel cell 600, the hydrogen enters the fuel cell 600 after being reduced in pressure from the third pipeline 430 through the third solenoid valve 530. Furthermore, a fourth solenoid valve 540 is provided at the hydrogen inlet of the fuel cell 600, and the fourth solenoid valve 540 is a pressure reducing valve. The pressure at the outlet of the fourth solenoid valve 540 is set to the maximum hydrogen filling pressure of the fuel cell 600, so as to prevent the third solenoid valve 530 from malfunctioning and causing the hydrogen pressure entering the fuel cell 600 to be too high, thereby damaging the fuel cell 600.

[0027] Furthermore, a third pressure detection device 431 is provided on the third pipeline 430, and the third pressure detection device 431 is arranged on a side close to the gas outlet of the third solenoid valve 530, and is used to monitor the hydrogen pressure after the third solenoid valve 530 is decompressed. The third pressure detection device 431 is electrically connected to the controller, and sends the hydrogen pressure after the third solenoid valve 530 in the third pipeline 430 is decompressed to the controller. If the hydrogen pressure after the third solenoid valve 530 is decompressed is greater than the preset pressure of the gas outlet of the third solenoid valve 530, the controller controls the fuel cell 600 to shut down, manually closes the gas outlet of the solid-state hydrogen storage device 200, and inspects the third solenoid valve 530.

[0028] See also Figure 1 In one embodiment, the pipeline assembly 400 further includes a first branch 450, which is connected in parallel to the third pipeline 430, and the junction of the first branch 450 and the third pipeline 430 is located at both ends of the third solenoid valve 530, and a fifth solenoid valve 550 is provided on the first branch 450. When the hydrogen pressure of the solid hydrogen storage device 200 is less than the maximum hydrogen filling pressure of the fuel cell 600, the controller drives the fifth solenoid valve 550 to open and the third solenoid valve 530 to close, and the hydrogen in the solid hydrogen storage device 200 enters the fuel cell 600 after merging with the third pipeline 430 through the first branch 450.

[0029] See also Figure 1In one embodiment, a sixth solenoid valve 560 is provided on the fourth pipeline 440, and the sixth solenoid valve 560 is electrically connected to the controller. The controller drives the sixth solenoid valve 560 to open, and the hydrogen storage tank 300 supplies hydrogen to the fuel cell 600. In this embodiment, the fourth pipeline 440 and the third pipeline 430 are connected to one end of the fuel cell 600 and then pass into the fuel cell 600. The junction of the fourth pipeline 440 and the third pipeline 430 is located between the fourth solenoid valve 540 and the fuel cell 600. A second flowmeter 432 is provided on the third pipeline 430, and the second flowmeter 432 is located after the junction of the third pipeline 430 and the first branch 450. The second flowmeter 432 is electrically connected to the controller, and the hydrogen flow rate in the third pipeline 430 is sent to the controller. When the hydrogen flow rate in the third pipeline 430 is less than the preset value, the controller drives the sixth solenoid valve 560 to open, and then controls the fuel cell 600 to shut down. After the fuel cell 600 is shut down, the controller closes the fourth solenoid valve 540 and the sixth solenoid valve 560 to prevent the insufficient gas content in the solid hydrogen storage device 200 from damaging the fuel cell 600. In this embodiment, the hydrogen pressure in the hydrogen storage tank 300 is within the hydrogen filling pressure range of the fuel cell 600.

[0030] See also Figure 1 The solid-state hydrogen storage device 200 will release heat during the hydrogen release process. In order to prevent the hydrogen temperature entering the fuel cell 600 from being too high and causing damage to the fuel cell 600, in one embodiment, a temperature detection device 433 is provided on the third pipeline 430. The temperature detection device 433 is located after the junction of the third pipeline 430 and the first branch 450, and is used to monitor the gas temperature in the third pipeline 430 in real time. If the temperature of the gas in the third pipeline 430 exceeds the preset value, the controller controls the fuel cell 600 to shut down. After the fuel cell 600 is shut down, the fourth solenoid valve 540 is closed.

[0031] See also Figure 1 In one embodiment, the hydrogen storage tank 300 can supply hydrogen to the fuel cell 600 alone for the fuel cell 600 reaction. In this embodiment, the pipeline assembly 400 also includes a second branch 460, one end of the second branch 460 is connected to the third pipeline 430, and the other end of the second branch 460 is connected to the fourth pipeline 440. The second branch 460 is provided with a seventh solenoid valve 570. When the hydrogen storage tank 300 supplies hydrogen to the fuel cell 600 alone, the controller drives the seventh solenoid valve 570 to open, and the hydrogen enters the third pipeline 430 from the fourth pipeline 440 through the second branch 460. At this time, the flow route of the hydrogen is the same as when the solid-state hydrogen storage device 200 supplies hydrogen to the fuel cell 600, and will not be repeated here. Here, the initial hydrogen pressure in the hydrogen storage tank 300 is much greater than the maximum hydrogen filling pressure of the fuel cell 600.

[0032] See also Figure 1 In one embodiment, the controller is installed in the electric control cabinet, and the controller is electrically connected to the electric control cabinet. A human-machine interface is provided on the electric control cabinet, which can display the pressures detected by the first pressure detection device 210, the second pressure detection device 310 and the third pressure detection device 431 and the gas flow rate detected by the first flowmeter 411 and the second flowmeter 432. The hydrogen storage capacity of the solid-state hydrogen storage device 200 can be obtained through the first flowmeter 411, and the hydrogen release capacity of the solid-state hydrogen storage device 200 can be obtained through the second flowmeter 432, and the utilization rate of hydrogen in the solid-state hydrogen storage device 200 can be further obtained. Various parameters can also be set on the human-machine interface, such as the output pressure of the pressure reducing valve, the pressure in the solid-state hydrogen storage device 200 and the hydrogen storage tank 300 when hydrogen filling is stopped, etc. Further, the fuel cell 600 is electrically connected to the controller, and the controller obtains various performance parameters such as the efficiency of the fuel cell 600 and displays them through the human-machine interface.

[0033] The utility model provides a hydrogen supply device for a fuel cell, wherein the solid-state hydrogen storage device is connected to the hydrogen production device and the fuel cell respectively through a pipeline assembly, and the hydrogen storage tank is also connected to the hydrogen production device and the fuel cell respectively through a pipeline assembly; when the pressure value in the solid-state hydrogen storage device is greater than a set threshold, the controller controls the solid-state hydrogen storage device to be connected to the fuel cell through an electromagnetic valve group, and controls the disconnection between the hydrogen storage tank and the fuel cell, so that the fuel cell is in a normal working state; when the pressure value in the solid-state hydrogen storage device is less than the set threshold, and the fuel cell needs to be shut down, the controller controls the connection between the hydrogen storage tank and the fuel cell, and the hydrogen storage tank and the solid-state hydrogen storage device cooperate in the shutdown process of the fuel cell, because with the cooperation of the hydrogen storage tank, the solid-state hydrogen storage device does not need to retain a higher pressure threshold to shut down the fuel cell, so the utilization rate of hydrogen in the solid-state hydrogen storage device can be improved. Therefore, the utility model effectively overcomes some practical problems in the prior art and has a high utilization value and use significance.

[0034] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A hydrogen supply device for a fuel cell, characterized in that: include: Hydrogen production device; A solid-state hydrogen storage device, connected to the hydrogen production device and the fuel cell respectively; A hydrogen storage tank, connected to the hydrogen production device and the fuel cell respectively; A pipeline assembly, connecting the solid-state hydrogen storage device, the hydrogen storage tank, the hydrogen production device and the fuel cell, and the pipeline assembly is provided with a solenoid valve group; A controller, electrically connected to the solenoid valve group; Among them, when the pressure value in the solid-state hydrogen storage device is greater than a set threshold, the controller controls the connection between the solid-state hydrogen storage device and the fuel cell through the solenoid valve group, and controls the disconnection between the hydrogen storage tank and the fuel cell; when the pressure value in the solid-state hydrogen storage device is less than the set threshold, the controller controls the connection between the hydrogen storage tank and the fuel cell.

2. The hydrogen supply device for a fuel cell according to claim 1, characterized in that: The pipeline assembly comprises: A first pipeline, one end of which is connected to the hydrogen production device, and the other end of which is connected to the solid hydrogen storage device; A second pipeline, one end of which is connected to the hydrogen production device, and the other end of which is connected to the hydrogen storage tank; A third pipeline, one end of which is connected to the solid-state hydrogen storage device, and the other end of which is connected to the fuel cell; A fourth pipeline has one end connected to the hydrogen storage tank and the other end connected to the fuel cell.

3. The hydrogen supply device for a fuel cell according to claim 2, characterized in that: A first solenoid valve is disposed on the first pipeline, a second solenoid valve is disposed on the second pipeline, and a third solenoid valve is disposed on the third pipeline. The first solenoid valve, the second solenoid valve and the third solenoid valve are electrically connected to the controller respectively.

4. The hydrogen supply device for a fuel cell according to claim 3, characterized in that: The first solenoid valve is a throttle valve, and the third solenoid valve is a pressure reducing valve.

5. The hydrogen supply device for a fuel cell according to claim 2, characterized in that: The pipeline assembly further includes a first branch, and the first branch is connected in parallel to the third pipeline.

6. The hydrogen supply device for a fuel cell according to claim 5, characterized in that: The third pipeline is provided with a temperature detection device, the temperature detection device is located after the junction of the third pipeline and the first branch, and the temperature detection device is electrically connected to the controller.

7. The hydrogen supply device for a fuel cell according to claim 5, characterized in that: The first pipeline is provided with a first flow meter, the third pipeline is provided with a second flow meter, the second flow meter is located after the junction of the third pipeline and the first branch, and the first flow meter and the second flow meter are electrically connected to the controller respectively.

8. The hydrogen supply device for a fuel cell according to claim 2, characterized in that: The pipeline assembly also includes a second branch, one end of the second branch is connected to the third pipeline, and the other end of the second branch is connected to the fourth pipeline.

9. The hydrogen supply device for a fuel cell according to claim 2, characterized in that: The solid-state hydrogen storage device is provided with a first pressure detection device, the hydrogen storage tank is provided with a second pressure detection device, the third pipeline is provided with a third pressure detection device, and the first pressure detection device, the second pressure detection device and the third pressure detection device are electrically connected to the controller respectively.

10. The hydrogen supply device for a fuel cell according to claim 1, characterized in that: The fuel cell is electrically connected to the controller.

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