Fuel cell gas supply device and fuel cell gas supply system

Abstract

The utility model provides a fuel cell gas supply device and a fuel cell gas supply system. The fuel cell gas supply device comprises a hydrogen supply pipeline, a nitrogen supply pipeline and an emptying pipeline, wherein the hydrogen supply pipeline is used for conveying hydrogen to a fuel cell, and the nitrogen supply pipeline and the emptying pipeline are sequentially communicated with the hydrogen supply pipeline in a branch way along a hydrogen flowing path. A first control part and a pressure reduction unit are arranged on the hydrogen supply pipeline, the first control part is arranged on the upstream of the nitrogen supply pipeline along the hydrogen flowing path and used for controlling the on-off of the hydrogen supply pipeline, and the pressure reduction unit is arranged between the nitrogen supply pipeline and the emptying pipeline and used for reducing the gas pressure in the hydrogen supply pipeline to preset pressure. According to the fuel cell gas supply device disclosed by the utility model, the first control part and the pressure reduction unit are arranged on the hydrogen supply pipeline, the first control part is arranged at the upstream of the nitrogen supply pipeline, and the pressure reduction unit is arranged between the nitrogen supply pipeline and the emptying pipeline; therefore, the nitrogen supply pipeline and the hydrogen supply pipeline can share the pressure reduction unit, so that parts can be reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a fuel cell gas supply device. At the same time, the utility model also relates to a fuel cell gas supply system provided with the fuel cell gas supply device. Background Technique

[0002] A fuel cell system is an efficient and environmentally friendly power generation system, and its core lies in the fuel cell. This kind of battery directly converts the chemical energy of the fuel into electrical energy through an electrochemical reaction. The fuel cell system mainly consists of a fuel cell stack, a hydrogen supply system, an air supply system and a nitrogen supply system. Among them, nitrogen is often used in the fuel cell power generation system for purging the gas supply circuit before oxygen supply and hydrogen supply to the stack. This step is crucial for ensuring the stable operation of the fuel cell. By purging the gas supply circuit, impurities and residual gases in it can be removed to prevent them from having a negative impact on the performance of the fuel cell.

[0003] The interior of the fuel cell stack needs to be maintained within a specific pressure range to work properly. This pressure range is usually much lower than the gas pressures in high-pressure hydrogen storage tanks and nitrogen cylinders. Therefore, a plurality of valve bodies need to be arranged on each pipeline to control the opening and closing of the pipeline or to reduce the pressure of the gas. However, since hydrogen, nitrogen and oxygen need to be supplied in the fuel cell system, and the existing hydrogen supply pipeline and nitrogen supply pipeline have a large degree of independence, a relatively large number of valve bodies need to be arranged on each of their respective pipelines, resulting in a large number of components and high costs. Summary of the Utility Model

[0004] In view of this, the utility model aims to propose a fuel cell gas supply device to reduce the number of components and costs.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] A fuel cell gas supply device includes a hydrogen supply pipeline for delivering hydrogen to the fuel cell, and a nitrogen supply pipeline and an evacuation pipeline that are sequentially connected to the hydrogen supply pipeline in the form of branches along the hydrogen flow path;

[0007] A first control part and a pressure reducing unit are arranged on the hydrogen supply pipeline. Along the hydrogen flow path, the first control part is arranged upstream of the nitrogen supply pipeline and is used to control the on-off of the hydrogen supply pipeline, and the pressure reducing unit is arranged between the nitrogen supply pipeline and the evacuation pipeline and is used to reduce the gas pressure in the hydrogen supply pipeline to a preset pressure.

[0008] Furthermore, a first one-way flow part is arranged on the nitrogen supply pipeline, and the first one-way flow part is used to define the one-way flow from the external nitrogen storage part to the nitrogen supply pipeline;

[0009] A second control part is provided on the evacuation pipeline, and the second control part is used to control the on / off of the evacuation pipeline.

[0010] Further, the evacuation pipeline has a first part and a second part arranged in parallel, and the first part and the second part are provided upstream of the second control part;

[0011] A third control part is provided on the first part, and the third control part is used to control the on / off of the first part, and a safety valve is provided on the second part.

[0012] Further, the second control part includes a second ball valve provided downstream of the first part and the second part; and / or,

[0013] The third control part includes a third ball valve provided on the first part.

[0014] Further, the pressure reducing unit includes a first pressure reducing valve and a second pressure reducing valve arranged in sequence on the hydrogen supply pipeline along the hydrogen flow path.

[0015] Further, a fourth control part is provided on the hydrogen supply pipeline, and the fourth control part is located between the first pressure reducing valve and the second pressure reducing valve and is used to control the on / off between the first pressure reducing valve and the second pressure reducing valve.

[0016] Further, a bypass is provided between the hydrogen supply pipeline and the evacuation pipeline, and a fifth control part is provided on the bypass, and the fifth control part is used to control the on / off of the bypass;

[0017] The connection point of the bypass and the hydrogen supply pipeline is located between the first pressure reducing valve and the second pressure reducing valve, and the connection point of the bypass and the evacuation pipeline is located downstream of the second control part.

[0018] Further, a manifold is provided at the inlet of the hydrogen supply pipeline, and the manifold can be communicated with an external hydrogen storage part through the manifold;

[0019] The manifold has a plurality of branch pipes arranged side by side, and a second one-way flow part is provided on each branch pipe to limit the one-way flow of hydrogen from the external hydrogen storage part to the branch pipe.

[0020] Compared with the prior art, the present utility model has the following advantages:

[0021] For the fuel cell gas supply device described in the present utility model, by providing a first control unit and a pressure reducing unit on the hydrogen supply pipeline, arranging the first control unit upstream of the nitrogen supply pipeline along the hydrogen flow path, and arranging the pressure reducing unit between the nitrogen supply pipeline and the evacuation pipeline; thus, it is possible to make the nitrogen supply pipeline and the hydrogen supply pipeline share the pressure reducing unit, without separately providing pressure reducing units on the two pipelines, thereby reducing components and lowering costs.

[0022] In addition, by providing a first unidirectional flow part on the nitrogen supply pipeline, reverse flow of nitrogen can be prevented, thereby improving the purging effect on the pipeline. By making the evacuation pipeline have a first part and a second part arranged in parallel, providing a third control unit on the first part, and providing a safety valve on the second part, thus, the pressure maintaining leak detection and purging evacuation operations can be realized by controlling the second control unit.

[0023] Secondly, the second control unit includes a second ball valve provided downstream of the first part and the second part, or the third control unit includes a third ball valve provided on the first part. The advantages of simple structure and mature technology of the ball valve can be utilized, making it convenient for design and implementation. The pressure reducing unit includes a first pressure reducing valve and a second pressure reducing valve arranged in sequence on the hydrogen supply pipeline along the hydrogen flow path, which can fully reduce the gas pressure to a preset pressure, thereby ensuring safety during the gas supply process.

[0024] Furthermore, by providing a fourth control unit between the first pressure reducing valve and the second pressure reducing valve, the fourth control unit can be controlled to close to purge the pipeline upstream of the second pressure reducing valve, improving the purging effect. By providing a bypass between the hydrogen supply pipeline and the evacuation pipeline, providing a fifth control unit on the bypass, and making the connection point between the bypass and the hydrogen supply pipeline located between the first pressure reducing valve and the second pressure reducing valve, and the connection point between the bypass and the evacuation pipeline located downstream of the second control unit, thus, when purging the pipeline upstream of the fifth control unit, the fifth control unit can be opened to quickly discharge nitrogen, improving the purging effect.

[0025] In addition, by providing a manifold at the inlet of the hydrogen supply pipeline and making the manifold have multiple branch pipes, thus, the hydrogen supply pipeline can be connected to the hydrogen manifold through each branch pipe. Compared with the connection method to the existing hydrogen supply station, the fuel cell gas supply device can be allowed to move, thereby having a better application effect.

[0026] Another object of the present utility model is to propose a fuel cell gas supply system, including the fuel cell gas supply device described above, a hydrogen storage part communicated with the hydrogen supply pipeline, and a nitrogen storage part communicated with the nitrogen supply pipeline.

[0027] Furthermore, the hydrogen storage part includes a hydrogen manifold, and / or the nitrogen storage part includes nitrogen cylinders.

[0028] The fuel cell air supply system described in the present utility model can share the pressure reducing unit for the nitrogen supply pipeline and the hydrogen supply pipeline by adopting the above fuel cell air supply device, without separately arranging pressure reducing units on the two pipelines, thereby reducing components and costs.

[0029] In addition, the hydrogen storage part includes hydrogen gas containers, and the nitrogen storage part includes nitrogen cylinders. Compared with the placement of the existing fuel cell air supply device connected to the existing hydrogen supply station, it allows the movement of this fuel cell air supply device, and thus can have better application effects. Brief Description of the Drawings

[0030] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0031] Figure 1 is a schematic structural diagram of the fuel cell air supply device described in the embodiment of the present utility model;

[0032] Description of the Reference Numerals:

[0033] A, hydrogen supply pipeline; B, nitrogen supply pipeline; C, evacuation pipeline; D, bypass;

[0034] 1, first ball valve; 2, second ball valve; 3, third ball valve; 4, fourth ball valve; 5, fifth ball valve; 6, sixth ball valve; 7, first check valve; 8, second check valve; 9, first pressure reducing valve; 10, second pressure reducing valve; 11, safety valve. Detailed Embodiments

[0035] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0036] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0037] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0038] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0039] The fuel cell system directly converts the chemical energy of the fuel into electrical energy through an electrochemical reaction. As an efficient and environmentally friendly power generation system, it is increasingly widely used. During the operation of the fuel cell system, hydrogen, air and nitrogen need to be supplied, and multiple valves need to be set on each pipeline to control the opening and closing of the pipeline or to reduce the pressure of the gas. However, since hydrogen, nitrogen and hydrogen need to be supplied in the fuel cell system, and the existing hydrogen supply pipeline and nitrogen supply pipeline are relatively independent, there are more valves on each pipeline, which is more expensive.

[0040] To this end, this embodiment particularly proposes a new fuel cell gas supply device, including a hydrogen supply pipeline A for delivering hydrogen to the fuel cell, and a nitrogen supply pipeline B and an exhaust pipeline C connected to the hydrogen supply pipeline A in the form of branches along the hydrogen flow path. Among them, a first control part and a pressure reducing unit are provided on the hydrogen supply pipeline A. Along the hydrogen flow path, the first control part is provided upstream of the nitrogen supply pipeline B and is used to control the on and off of the hydrogen supply pipeline A. The pressure reducing unit is provided between the nitrogen supply pipeline B and the exhaust pipeline C and is used to reduce the gas pressure in the hydrogen supply pipeline A to a preset pressure.

[0041] The fuel cell gas supply device of this embodiment is provided with a first control unit and a decompression unit on the hydrogen supply pipeline A, and the first control unit is provided upstream of the nitrogen supply pipeline B along the hydrogen flow path, and the decompression unit is provided between the nitrogen supply pipeline B and the exhaust pipeline C. Thus, the nitrogen supply pipeline B and the hydrogen supply pipeline A can share the decompression unit, and there is no need to provide the decompression units on the two pipelines respectively, thereby reducing parts and reducing costs.

[0042] Based on the above overall introduction, an exemplary structure of the fuel cell gas supply device of this embodiment is referred to as follows: Figure 1 As shown in , here, as a preferred embodiment, a bus is provided at the inlet of the hydrogen supply pipeline A, and can be connected to the external hydrogen storage unit through the bus. In addition, the bus has a plurality of branch pipes arranged side by side, and at the same time, a second one-way flow portion is provided on each branch pipe to limit the one-way flow of hydrogen from the external hydrogen storage unit to the branch pipe.

[0043] With such a setting, the hydrogen supply device can be connected to the hydrogen container through each branch pipe. Compared with the connection method to the existing hydrogen supply station, it allows the fuel cell gas supply device to move, thus having a better application effect. In addition, different branch pipes can be respectively connected to different hydrogen storage parts, which can have better use flexibility. And, as a specific implementation manner, as shown in Figure 1 , the second one-way flow part is specifically the second one-way valve 8 provided on each branch pipe. Its technology is mature, widely used, and convenient for design and implementation.

[0044] In addition, it should be noted that, as shown in Figure 1 , as a specific embodiment, there are three branch pipes arranged side by side in this embodiment. After two of the branch pipes are connected through a tee pipe, they are connected to the other branch pipe through another tee pipe and communicate with the hydrogen supply pipeline A. Moreover, to facilitate the connection of each branch pipe to the external hydrogen supply part, a hose joint can be provided at the inlet end of each branch pipe, and an existing structure can be adopted. In addition, it can be understood that the number of branch pipes can be set to other numbers according to design requirements besides three, and the arrangement manner between each branch pipe and the hydrogen supply pipeline A is not limited to Figure 1 shown, as long as the connection between each branch pipe and the hydrogen supply pipeline A can be achieved.

[0045] In this embodiment, a first one-way flow part is provided on the nitrogen supply pipeline B, and the first one-way flow part is used to limit the one-way flow from the external nitrogen storage part to the nitrogen supply pipeline B. Continuing to refer to Figure 1 , as a specific embodiment, the first one-way flow part of this embodiment is specifically the first one-way valve 7 provided on the nitrogen supply pipeline B. Its technology is mature, widely used, and convenient for design and implementation.

[0046] Here, it should be noted that the external nitrogen storage part is, for example, a nitrogen cylinder, which generally has a switch for controlling opening and closing. Therefore, in order to further reduce the valve body of the nitrogen supply pipeline B, no additional valve body for controlling the on-off of the nitrogen supply pipeline B is provided on the nitrogen supply pipeline B in this embodiment. Moreover, only setting the first one-way valve 7 on the nitrogen supply pipeline B can effectively shorten the length of the nitrogen supply pipeline B and further reduce the cost. In addition, to facilitate the connection of the nitrogen supply pipeline B to the external nitrogen storage part, a hose joint can also be provided at the inlet end of the nitrogen supply pipeline B.

[0047] Still referring to Figure 1As shown in the figure, as a specific embodiment, the first control unit of this embodiment includes a first ball valve 1 provided on the hydrogen supply pipeline A. Of course, in addition to using a ball valve for the first control unit, it is also possible to use other existing valve bodies, as long as the on-off of the hydrogen supply pipeline A can be controlled. The pressure reducing unit includes a first pressure reducing valve 9 and a second pressure reducing valve 10 that are sequentially provided on the hydrogen supply pipeline A along the hydrogen flow path. Among them, in this embodiment, the structures of the first pressure reducing valve 9 and the second pressure reducing valve 10 are not improved, and the existing technology can be directly adopted. Additionally, generally, during the operation of the fuel cell system, the first pressure reducing valve 9 is used to reduce the pressure of the gas from 10 Mpa - 12 Mpa to 2.4 Mpa, and the second pressure reducing valve 10 further reduces the pressure of the gas after being reduced by the first pressure reducing valve 9 to 1.8 Mpa.

[0048] As a further implementation manner, a fourth control unit is provided on the hydrogen supply pipeline A. The fourth control unit is located between the first pressure reducing valve 9 and the second pressure reducing valve 10 and is used to control the on-off between the first pressure reducing valve 9 and the second pressure reducing valve 10. Thus, the fourth control unit can be controlled to close, and the pipeline upstream of the second pressure reducing valve 10 can be purged, which can improve the purging effect. Among them, the fourth control unit of this embodiment specifically includes a fourth ball valve 4 provided on the hydrogen supply pipeline A. Its structure is simple, the technology is mature, it is widely used, and it is easy to obtain. Of course, in addition to using a ball valve for the fourth control unit, it is also possible to use other existing valve bodies, as long as the on-off can be controlled.

[0049] In addition, in this embodiment, a second control unit is provided on the evacuation pipeline C. The second control unit is used to control the on-off of the evacuation pipeline C. Thus, the on-off of the evacuation pipeline C can be controlled through the second control unit, so that when purging with nitrogen, the evacuation pipeline C can be controlled to open, and when pressure holding and leak detection or normal operation is carried out, the evacuation pipeline C can be controlled to disconnect. As Figure 1 As shown in the figure, as a specific embodiment, the second control unit of this embodiment specifically includes a second ball valve 2 provided on the evacuation pipeline C. Its structure is simple, the technology is mature, it is widely used, and it is easy to obtain. Of course, in addition to using a ball valve for the second control unit, it is also possible to use other existing valve bodies, as long as the on-off of the evacuation pipeline C can be controlled.

[0050] As a further implementation manner, as Figure 1 As shown in the figure, the evacuation pipeline C of this embodiment has a first part and a second part arranged in parallel, and the first part and the second part are provided upstream of the second control unit. And a third control unit is provided on the first part, and the third control unit is used to control the on-off of the first part, and a safety valve 11 is provided on the second part. With such a setting, the first part can be controlled to disconnect through the third control unit. At this time, the pressure holding and leak detection operation can be carried out. Additionally, the first part can be controlled to open through the third control unit to discharge nitrogen during the purging process.

[0051] Among them, as shown in Figure 1 As a specific embodiment, the third control unit of this embodiment specifically includes a third ball valve 3 provided on the first part. Its structure is simple, the technology is mature, it is widely used, and it is easy to obtain. Of course, in addition to using a ball valve for the third control unit, it is also possible to use other existing valve bodies as long as they can control the on-off of the first part.

[0052] Still referring to Figure 1 As shown in, as a further implementation manner, a bypass D is provided between the hydrogen supply pipeline A and the evacuation pipeline C, and a fifth control unit is provided on the bypass D for controlling the on-off of the bypass D. Moreover, the connection point of the bypass D and the hydrogen supply pipeline A is located between the first pressure reducing valve 9 and the second pressure reducing valve 10, and the connection point of the bypass D and the evacuation pipeline C is located downstream of the second control unit. Thus, when purging the pipeline upstream of the fifth control unit, the fifth control unit can be opened and nitrogen can be quickly discharged through the bypass D, which can improve the purging effect.

[0053] Among them, as a specific embodiment, as shown in Figure 1 As shown in, the fifth control unit of this embodiment specifically includes a fifth ball valve 5 provided on the bypass. Its structure is simple, the technology is mature, it is widely used, and it is easy to obtain. Of course, in addition to using a ball valve for the fifth control unit, it is also possible to use other existing valve bodies as long as they can control the on-off of the bypass D. In addition, as shown in Figure 1 As shown in, a sixth control valve is provided at the outlet end of the hydrogen supply pipeline A to control the on-off between the hydrogen supply pipeline A and the external hydrogen storage unit. Among them, the sixth control unit specifically includes a sixth ball valve 6. Its structure is simple, the technology is mature, it is widely used, and it is easy to obtain.

[0054] Based on the above overall introduction, when the fuel cell gas supply device of this embodiment is in use, only the fifth ball valve 5 can be opened and other ball valves can be closed, so that the nitrogen gas in the nitrogen supply pipeline B flows through the first pressure reducing valve 9 and then is discharged through the bypass D and the evacuation pipeline C to purge the pipeline upstream of the second pressure reducing valve 10. When purging the pipeline downstream of the second pressure reducing valve 10, the second ball valve 2 and the third ball valve 3 can be opened and other ball valves can be closed, so that the nitrogen gas in the nitrogen supply pipeline B flows through the first pressure reducing valve 9 and the second pressure reducing valve 10, then flows through the second part and is discharged into the air through the second ball valve 2 to purge the pipelines of other parts.

[0055] When using nitrogen for pressure holding and leak detection, leak detection liquid can be applied to the outside of the pipeline, and the fourth ball valve 4 can be opened and other ball valves can be closed. Nitrogen can flow through the first one-way valve 7 and the first pressure reducing valve 9, then through the fourth ball valve 4 and the second pressure reducing valve 10, and then flow into the safety valve 11 of the second part (which opens only at a certain pressure). When the safety valve 11 does not open and there are no bubbles in the leak detection liquid, it indicates that this gas supply pipeline does not leak.

[0056] It can be seen that the fuel cell gas supply device of this embodiment can share multiple sections of pipelines and components between the nitrogen supply pipeline B and the hydrogen supply pipeline A on the premise of realizing the gas supply function, which can effectively reduce the number and cost of components. Moreover, through the setting of the manifold, this hydrogen supply device can be connected to the hydrogen container grid through each branch pipe. Compared with the connection method to the existing hydrogen supply station, it allows this fuel cell gas supply device to move, thus having a better application effect.

[0057] In addition, this embodiment also relates to a fuel cell gas supply system, including the above fuel cell gas supply device, a hydrogen storage part communicated with the hydrogen supply pipeline A, and a nitrogen storage part communicated with the nitrogen supply device.

[0058] As a further implementation manner, the hydrogen storage part of this embodiment includes a hydrogen container grid, which can directly adopt the existing technology and will not be elaborated here. And the nitrogen storage part includes nitrogen cylinders. Of course, in addition to using a hydrogen container grid, the hydrogen storage part can also adopt other hydrogen storage structures. In addition to including nitrogen cylinders, the nitrogen storage part can also include other nitrogen storage devices.

[0059] The fuel cell gas supply system of this embodiment can share the pressure reducing unit between the nitrogen supply pipeline B and the hydrogen supply pipeline A by adopting the above fuel cell gas supply device, without separately setting pressure reducing units on the two pipelines, thereby reducing components and costs. In addition, the hydrogen storage part includes a hydrogen container grid, and the nitrogen storage part includes nitrogen cylinders. Compared with the placement of the existing fuel cell gas supply device connected to the existing hydrogen supply station, it allows this fuel cell gas supply device to move, thus having a better application effect.

[0060] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A fuel cell gas supply device, characterized in that: It includes a hydrogen supply pipeline (A) for delivering hydrogen to the fuel cell, and a nitrogen supply pipeline (B) and an evacuation pipeline (C) that are successively connected to the hydrogen supply pipeline (A) in the form of branches along the hydrogen flow path; A first control part and a pressure reducing unit are provided on the hydrogen supply pipeline (A). Along the hydrogen flow path, the first control part is arranged upstream of the nitrogen supply pipeline (B) and is used to control the on / off of the hydrogen supply pipeline (A), and the pressure reducing unit is arranged between the nitrogen supply pipeline (B) and the evacuation pipeline (C) and is used to reduce the gas pressure in the hydrogen supply pipeline (A) to a preset pressure.

2. The fuel cell gas supply device according to claim 1, characterized in that: A first one-way flow part is provided on the nitrogen supply pipeline (B), and the first one-way flow part is used to define the one-way flow from the external nitrogen storage part to the nitrogen supply pipeline (B); A second control part is provided on the evacuation pipeline (C), and the second control part is used to control the on / off of the evacuation pipeline (C).

3. The fuel cell gas supply device according to claim 2, characterized in that: The evacuation pipeline (C) has a first part and a second part arranged in parallel, and the first part and the second part are arranged upstream of the second control part; A third control part is provided on the first part, and the third control part is used to control the on / off of the first part, and a safety valve (11) is provided on the second part.

4. The fuel cell gas supply device according to claim 3, characterized in that: The second control part includes a second ball valve (2) arranged downstream of the first part and the second part; and / or, The third control part includes a third ball valve (3) arranged on the first part.

5. The fuel cell gas supply device according to claim 3, characterized in that: The pressure reducing unit includes a first pressure reducing valve (9) and a second pressure reducing valve (10) that are successively arranged on the hydrogen supply pipeline (A) along the hydrogen flow path.

6. The fuel cell gas supply device according to claim 5, characterized in that: A fourth control part is provided on the hydrogen supply pipeline (A), and the fourth control part is located between the first pressure reducing valve (9) and the second pressure reducing valve (10) and is used to control the on / off between the first pressure reducing valve (9) and the second pressure reducing valve (10).

7. The fuel cell gas supply device according to claim 6, characterized in that: A bypass (D) is provided between the hydrogen supply pipeline (A) and the evacuation pipeline (C), and a fifth control part is provided on the bypass (D) and is used to control the on / off of the bypass (D); The connection point of the bypass (D) and the hydrogen supply pipeline (A) is located between the first pressure reducing valve (9) and the second pressure reducing valve (10), and the connection point of the bypass (D) and the evacuation pipeline (C) is located downstream of the second control part.

8. The fuel cell gas supply device according to any one of claims 1 to 7, characterized in that: The inlet of the hydrogen supply pipeline (A) is provided with a manifold, and can be communicated with an external hydrogen storage part through the manifold; The manifold has a plurality of branch pipes arranged side by side, and a second one-way flow part is provided on each of the branch pipes to define the one-way flow of hydrogen from the external hydrogen storage part to the branch pipes.

9. A fuel cell air supply system, characterized in that: It includes the fuel cell air supply device according to any one of claims 1 to 8, a hydrogen storage part communicated with the hydrogen supply pipeline (A), and a nitrogen storage part communicated with the nitrogen supply pipeline (B).

10. The fuel cell air supply system according to claim 9, characterized in that: The hydrogen storage part includes hydrogen containers, and / or the nitrogen storage part includes nitrogen cylinders.

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