Fuel cell hydrogen supply device, fuel cell system and fuel cell vehicle

Abstract

The utility model provides a fuel cell hydrogen supply device, a fuel cell system and a fuel cell vehicle. The fuel cell hydrogen supply device comprises a gas-liquid separator, an ejector and a water storage box, wherein the ejector and the water storage box are arranged on one side of the gas-liquid separator. Wherein the upper end and the lower end of the gas-liquid separator are respectively provided with a separation port and a liquid discharge port, the side part of the gas-liquid separator is provided with a tail gas inlet, and the tail gas inlet is used for being communicated with an anode outlet of a galvanic pile. The ejector is vertically arranged, a first-stage gas inlet of the ejector is used for being communicated with a hydrogen supply pipeline, a second-stage gas inlet of the ejector is communicated with the separation opening, and a gas outlet of the ejector is used for being communicated with an anode inlet of a galvanic pile. And the water storage box is arranged at the bottom of the ejector and is communicated with the ejector and the gas-liquid separator. The fuel cell hydrogen supply device disclosed by the utility model can effectively avoid water plugging at the anode side of the electric pile, and is beneficial to prolonging the service life and improving the reliability of the electric pile and the system.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell technology, and in particular to a fuel cell hydrogen supply device. It also relates to a fuel cell system equipped with the fuel cell hydrogen supply device, and a fuel cell vehicle equipped with the fuel cell system. Background Technology

[0002] With the increasingly widespread application of fuel cell vehicles in the market, the market demand for high-power fuel cell systems continues to rise. In this context, the lifespan and reliability of fuel cell systems face significant challenges. Among these challenges, water management on the anode side of the fuel cell stack is crucial. If a large amount of water enters the anode side of the stack, it will lead to a decrease and fluctuation in stack performance. Moreover, in severe cases, it can even cause flooding, resulting in serious problems such as stack loss.

[0003] Currently, anode water management primarily relies on adding gas-liquid separators, increasing insulation, and employing specific strategies to control liquid water generation. However, in practical applications, these measures cannot fully cover all vehicle operating conditions due to the complex environment of the system within the vehicle. For example, when the system is exposed to low temperatures or large temperature differences, more liquid water will condense in the pipelines. In such cases, existing control measures may not be effective in addressing this situation, leading to liquid water accumulation on the anode side and affecting fuel cell performance and lifespan. Furthermore, due to the height difference in installation and the presence of unseparated liquid water in the gas-liquid separator, liquid water can also directly enter the fuel cell stack with the airflow, increasing the risk of flooding the stack. Utility Model Content

[0004] In view of this, the present invention aims to provide a hydrogen supply device for fuel cells that can effectively avoid the occurrence of water flooding of the fuel cell stack.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A fuel cell hydrogen supply device includes a gas-liquid separator, and an ejector and a water storage box disposed on one side of the gas-liquid separator.

[0007] The gas-liquid separator is provided with a separation port and a drain port at its upper and lower ends, respectively, and a tail gas inlet is provided on the side of the gas-liquid separator. The tail gas inlet is used to connect with the anode outlet of the fuel cell stack.

[0008] The ejector is arranged vertically, and the primary gas inlet of the ejector is connected to the hydrogen supply pipeline, the secondary gas inlet of the ejector is connected to the separation port, and the gas outlet of the ejector is connected to the anode inlet of the fuel cell stack.

[0009] The water storage box is located at the bottom of the ejector and is connected to the ejector and the gas-liquid separator.

[0010] Furthermore, it also includes a circulation pump located above the gas-liquid separator, with the inlet of the circulation pump connected to the separation port and the outlet of the circulation pump connected to the secondary gas inlet of the ejector.

[0011] Furthermore, the water storage box is provided with a guide plate. One end of the guide plate is connected to the side wall of one side of the water storage box, and the other end is inclined towards the bottom of the water storage box, forming a gap between the guide plate and the other side wall of the water storage box to allow airflow.

[0012] Furthermore, the guide plates are multiple ones spaced apart in the water storage box along the vertical direction;

[0013] Multiple guide plates are alternately connected to the two side walls of the water storage box.

[0014] Furthermore, it also includes a connecting pipe, and the bottom of the water storage box is provided with a drain outlet, which is connected to the gas-liquid separator through the connecting pipe;

[0015] The connecting pipe is inclined downwards in a direction away from the water storage box.

[0016] Furthermore, the ejector is provided with an exhaust pipe that communicates with the exhaust port, and the exhaust pipe is used to communicate with the anode inlet of the fuel cell stack.

[0017] The exhaust pipe is equipped with a baffle. One end of the baffle is connected to the side wall of the exhaust pipe, and the other end is inclined away from the ejector, forming a space for airflow between the baffle and the other side wall of the exhaust pipe.

[0018] Furthermore, the baffles are multiple baffles spaced apart along the length of the air outlet pipe;

[0019] Multiple baffles are alternately connected to the two side walls of the air outlet pipe.

[0020] Furthermore, the exhaust pipe is inclined upwards in a direction away from the ejector.

[0021] Compared with the prior art, this utility model has the following advantages:

[0022] The fuel cell hydrogen supply device of this invention allows tail gas containing liquid water from the anode outlet of the fuel cell stack to enter a gas-liquid separator for separation through the tail gas inlet. The gas then enters the ejector through the separation port and then enters the anode inlet of the electric propeller, improving the utilization rate of hydrogen. The separated liquid water is discharged from the drain port. Simultaneously, the water storage box can promptly collect the liquid water separated from the gas by gravity in the gas-liquid separator, as well as the liquid water separated from the fresh hydrogen entering the ejector under gravity. The liquid water is discharged through the drain port of the gas-liquid separator, preventing the accumulation of liquid water in the fuel cell stack system and affecting its normal operation, thus ensuring the reliability and stability of the system.

[0023] Furthermore, by installing a circulation pump, the gas separated by the gas-liquid separator can be facilitated to enter the ejector under the power of the circulation pump. By installing a guide plate inside the water storage tank, with one end connected to the water storage tank and the other end inclined towards the bottom with a gap, it not only provides some obstruction for hydrogen, facilitating its entry into the anode inlet of the fuel cell stack and ensuring hydrogen supply efficiency, but also guides the liquid to flow horizontally and slowly into the bottom of the water storage tank, preventing splashing into the ejector. Moreover, the guide plate also prevents water vapor formed from the vaporization of water stored in the water storage tank from flowing randomly in the opposite direction with the airflow into the ejector or the anode inlet of the fuel cell stack, thus helping to ensure the performance of the fuel cell stack.

[0024] Secondly, by setting up multiple guide vanes and alternately connecting them to the side walls of the water storage box, the airflow can be continuously contracted and expanded during the flow process. When the airflow contracts, water vapor is more easily separated and adheres to the side walls of the water storage box or the guide vanes, thereby further improving the separation effect of water vapor and hydrogen, which is conducive to ensuring the quality of hydrogen entering the fuel cell stack. Moreover, the multi-layer guide vanes also play a role in blocking water vapor that may be generated by water vaporization, which can further reduce the water vapor from entering the ejector in the reverse direction with the airflow or directly entering the anode inlet of the fuel cell stack.

[0025] Furthermore, by setting up a connecting pipe, the liquid water in the water storage box can be returned to the gas-liquid separator in a timely manner. By setting the connecting pipe downwards in a direction away from the water storage box, the natural return of liquid water can be achieved by gravity, which can make the liquid water in the water storage box drain out in a timely manner and effectively reduce the risk of liquid water in the water storage box vaporizing and entering the ejector.

[0026] By installing a baffle inside the outlet pipe, creating a space between the baffle and the other side wall of the outlet pipe for airflow, not only is the normal flow of hydrogen ensured, but the gas also collides with the baffle during its flow, facilitating the separation of water vapor in the hydrogen into liquid water, which then flows back into the water storage box. This effectively reduces the amount of liquid water entering the fuel cell stack. At the same time, the baffle also effectively prevents gas backflow, avoiding damage to the ejector caused by the impact of reverse airflow.

[0027] Furthermore, by setting up multiple baffles and alternately connecting them to the side walls of the outlet pipe, not only can multi-stage obstruction be formed for hydrogen gas, facilitating the separation of entrained water vapor and thus ensuring the dryness of the anode gas in the fuel cell stack, but also, when pressure fluctuations occur at the anode inlet causing a tendency for gas to flow in the opposite direction, the multiple baffles form layers of obstruction, effectively preventing damage to the ejector due to the impact of the reverse airflow. The outlet pipe is also inclined upwards in the direction away from the ejector, allowing the liquid water separated in the outlet pipe to enter the water storage box through the ejector, effectively preventing water blockage in the fuel cell stack.

[0028] Another objective of this invention is to provide a fuel cell system, which includes a fuel cell stack and a fuel cell hydrogen supply device as described above.

[0029] The fuel cell system described in this invention, by setting up the hydrogen supply device for the fuel cell as described above, can effectively prevent liquid water from accumulating at the anode inlet of the fuel cell stack, thus affecting the normal operation of the system and helping to ensure the reliability and stability of the system.

[0030] In addition, this utility model also proposes a fuel cell vehicle, which is equipped with the fuel cell system described above.

[0031] The fuel cell vehicle of this invention has all the beneficial effects of the aforementioned fuel cell system, which will not be repeated here. Attached Figure Description

[0032] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0033] Figure 1 This is a schematic diagram of the structure of the fuel cell hydrogen supply device described in an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the structure of the air outlet pipe and baffle described in an embodiment of the present utility model;

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Gas-liquid separator; 2. Circulating pump; 3. Ejector; 4. Water storage box; 5. Baffle plate; 6. Connecting pipe; 7. Gas outlet pipe; 8. Baffle; 9. Gas inlet pipe;

[0037] 101. Exhaust gas inlet; 102. Liquid drain outlet; 103. Separation port. Detailed Implementation

[0038] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0039] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0041] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0042] Given the current situation where existing systems struggle to effectively produce liquid water simply by adding a gas-liquid separator, increasing insulation, or employing specific strategies, and considering the phenomenon that liquid water can directly enter the fuel cell stack with the gas flow due to the height difference in the arrangement and the presence of unseparated liquid water in the gas-liquid separator, this embodiment proposes a novel fuel cell hydrogen supply device. In terms of its overall structure, as follows... Figure 1 As shown, it mainly includes a gas-liquid separator 1, an ejector 3 and a water storage box 4 located on one side of the gas-liquid separator 1.

[0043] The gas-liquid separator 1 has a separation port 103 at its upper and lower ends and a drain port 102 at its lower ends, and a tail gas inlet 101 on its side, which is connected to the anode outlet of the fuel cell stack. The ejector 3 is vertically arranged, with its primary gas inlet connected to the hydrogen supply pipeline, its secondary gas inlet connected to the separation port 103, and its outlet connected to the anode inlet of the fuel cell stack. A water storage box 4 is located at the bottom of the ejector 3 and is connected to both the ejector 3 and the gas-liquid separator 1.

[0044] The fuel cell hydrogen supply device of this embodiment allows the tail gas containing liquid water from the anode outlet of the fuel cell stack to enter the gas-liquid separator 1 through the tail gas inlet 101 for separation. The separated gas then enters the secondary gas inlet of the ejector 3 through the separation port 103. Simultaneously, hydrogen from the hydrogen supply pipeline enters the ejector 3 as the primary gas. In the ejector 3, the negative pressure generated by the high-speed flow of the primary gas (fresh hydrogen) draws in the secondary gas (anode tail gas from the circulation pump 2) and mixes it. The mixture then enters the anode inlet of the fuel cell stack from the outlet of the ejector 3, providing the fuel cell stack with hydrogen and recycled anode tail gas. This improves hydrogen utilization, reduces hydrogen waste, and lowers the operating cost of the fuel cell system.

[0045] In addition, the separated liquid water in the gas-liquid separator 1 accumulates at the bottom and is discharged from the drain port 102. Meanwhile, the water storage box 4 is located at the bottom of the ejector 3 and is used to collect liquid water that may be separated from the gas separated by the gas-liquid separator 1 under the action of gravity, as well as liquid water that may be separated from the fresh hydrogen gas entering the ejector 3 under the action of gravity. It can be discharged through the drain port 102 of the gas-liquid separator 1 to ensure that the liquid water can be discharged and stored smoothly, and to prevent the liquid water from accumulating in the fuel cell stack system and affecting the normal operation of the fuel cell stack system.

[0046] Furthermore, as a further implementation method, such as Figure 1 As shown, the fuel cell hydrogen supply device of this embodiment also includes a circulation pump 2 disposed above the gas-liquid separator 1. Furthermore, the inlet of the circulation pump 2 is connected to the separation port 103 of the gas-liquid separator 1, and the outlet of the circulation pump 2 is connected to the secondary gas inlet of the ejector 3. By providing the circulation pump 2, the gas separated by the gas-liquid separator 1 can be facilitated to enter the ejector 3 under the power of the circulation pump 2.

[0047] To be more specific, such as Figure 1 As shown, the ejector 3 is connected to the outlet of the circulating pump 2 via a pipeline, and an inlet pipe 9 for connecting to the hydrogen supply pipeline is provided at the primary gas inlet of the ejector 3. The circulating pump 2, gas-liquid separator 1 and ejector 3 can all adopt existing structures directly, and these components are commonly used and readily available in the field, so their structures will not be described in detail here.

[0048] In addition, continue to refer to Figure 1 As shown in the diagram, in a further embodiment, a guide plate 5 is provided inside the water storage box 4. One end of the guide plate 5 is connected to one side wall of the water storage box 4, and the other end slopes towards the bottom of the water storage box 4, forming a gap between it and the other side wall of the water storage box 4 to allow airflow. In this embodiment, by providing the guide plate 5, it not only collides with the hydrogen gas flowing out of the ejector 3, facilitating the separation of water vapor from the hydrogen gas, but also prevents the separated hydrogen gas from entering the water storage box 4, allowing it to directly enter the anode inlet of the fuel cell stack.

[0049] Furthermore, the separated liquid can flow into the bottom of the water storage box 4 under the action of the guide plate 5, thereby reducing the water vapor content entering the fuel cell stack, which is beneficial for protecting the fuel cell stack and improving the operating efficiency and lifespan of the entire system. Moreover, the presence of the guide plate 5 can also prevent gas from disturbing the liquid water in the water storage box 4, effectively preventing fluctuations and splashing of the liquid water in the water storage box 4. This not only effectively prevents liquid water from overflowing the water storage box 4, but may also prevent the water vaporization from intensifying.

[0050] Furthermore, the shape of the water storage box 4 can be adapted to the ejector 3, and the shape of the guide plate 5 is not specifically limited here. For example, when the water storage box 4 is rectangular, the guide plate 5 can also be rectangular, and when the water storage box 4 is circular, the guide plate 5 can also be arc-shaped. In this embodiment, as a further implementation, multiple guide plates 5 are spaced apart in the water storage box 4 along the vertical direction, and the multiple guide plates 5 are alternately connected to the two side walls of the water storage box 4. As a specific embodiment, Figure 1 Only two deflectors 5 are shown in the diagram. It is understandable that the tilt angle and number of deflectors 5 are not limited to... Figure 1 As shown, it can be adjusted accordingly based on design requirements.

[0051] In this embodiment, by setting multiple guide plates 5 that are alternately connected to the two side walls of the water storage box 4, hydrogen can be intercepted layer by layer, and the hydrogen can be continuously contracted and expanded during the flow. When the hydrogen contracts, water vapor is more easily separated and adheres to the surface of the guide plate 5 or falls back into the liquid water at the bottom of the water storage box 4. Therefore, multiple gas-liquid separations can be achieved after passing through multiple guide plates 5.

[0052] Meanwhile, the inclined design of the guide vane 5 helps guide water vapor downwards, thus greatly enhancing the water vapor separation effect and making the hydrogen entering the fuel cell stack drier, reducing the adverse effects of water vapor on the electric propulsion. Moreover, the multi-layer guide vane 5 also acts as a barrier against water vapor generated by potential water vaporization, further reducing the risk of water vapor entering the ejector 3 in the reverse direction with the airflow or directly entering the anode inlet of the fuel cell stack.

[0053] like Figure 1 As shown in the diagram, as a further embodiment, the fuel cell hydrogen supply device of this embodiment also includes a connecting pipe 6. The bottom of the water storage box 4 is provided with a drain outlet, which is connected to the gas-liquid separator 1 via the connecting pipe 6. Furthermore, the connecting pipe 6 is inclined downwards in the direction away from the water storage box 4. In this embodiment, by providing the connecting pipe 6, the liquid water in the water storage box 4 can flow back to the gas-liquid separator 1 in a timely manner, avoiding the long-term accumulation of liquid water in the water storage box 4. The downward inclination of the connecting pipe 6 in the direction away from the water storage box 4 allows for natural backflow of liquid water using gravity, enabling timely discharge of liquid water from the water storage box 4 and effectively reducing the risk of liquid water in the water storage box 4 vaporizing and entering the ejector 3.

[0054] Continue to refer to Figure 1 As shown, in a preferred embodiment, the ejector 3 is provided with an exhaust pipe 7 that communicates with the exhaust port and is used to communicate with the anode inlet of the fuel cell stack. Furthermore, a baffle 8 is provided inside the exhaust pipe 7. One end of the baffle 8 is connected to the side wall of the exhaust pipe 7, and the other end is inclined away from the ejector 3, forming a space for airflow between the baffle 8 and the other side wall of the exhaust pipe 7.

[0055] In this embodiment, by installing a baffle 8 inside the outlet pipe 7, and creating a space between the baffle 8 and the other side wall of the outlet pipe 7 for airflow, not only is the normal flow of hydrogen ensured, but the gas also collides with the baffle 8 during its flow, facilitating the separation of water vapor in the hydrogen into liquid water, which then flows back into the water storage box 4. This effectively reduces the amount of liquid water entering the fuel cell stack. Simultaneously, the baffle 8 also effectively prevents gas backflow, avoiding damage to the ejector 3 caused by the impact of reverse airflow.

[0056] As a further implementation method, such as Figure 1 As shown, multiple baffles 8 are spaced apart along the length of the air outlet pipe 7, and the multiple baffles 8 are alternately connected to the two side walls of the air outlet pipe 7. This is one example of a structure. Figure 1 Only three baffles 8 are shown in the diagram. Of course, the number and tilt angle of the baffles 8 are not limited to this. Figure 1 As shown, it can be adjusted according to actual needs. Additionally, the cross-section of the exhaust pipe 7 is generally... Figure 2 As shown in the diagram, the baffle 8 in this embodiment is circular; therefore, as a specific embodiment, it is... Figure 2 The shape shown is an arc. Of course, the shape of the baffle 8 is not limited to this. Figure 2 As shown, it can be adjusted accordingly based on design requirements.

[0057] In this embodiment, the arrangement of multiple baffles 8 not only does not affect the entry of hydrogen into the anode inlet of the fuel cell stack, but also creates multi-stage obstruction of the hydrogen, thereby achieving multi-stage water vapor separation and effectively reducing water vapor in the anode inlet of the fuel cell stack. Furthermore, the multiple baffles 8 optimize the uniformity of the hydrogen flow, and when pressure fluctuations at the anode inlet cause a tendency for reverse gas flow, the multiple baffles 8 form layers of obstruction, effectively preventing damage to the ejector 3 due to the impact of the reverse airflow.

[0058] In addition, as Figure 1 As shown in the diagram, as a further embodiment, the vent pipe 7 is inclined upwards in the direction away from the ejector 3. This arrangement facilitates the flow of liquid water separated from the vent pipe 7 into the water storage box 4 via the ejector 3, and then discharged through the gas-liquid separator 1, effectively preventing water blockage in the fuel cell stack.

[0059] Based on the above overall description, the fuel cell hydrogen supply device of this embodiment, by adopting the above structure, can effectively prevent liquid water that is not separated by the gas-liquid separator 1 from entering the anode inlet of the fuel cell stack, thereby effectively avoiding water blockage on the anode side of the fuel cell stack and improving the lifespan and reliability of the fuel cell stack and system.

[0060] Furthermore, this embodiment also proposes a fuel cell system, including a fuel cell stack and a fuel cell hydrogen supply device as described above.

[0061] The fuel cell system of this embodiment, by setting up the above-mentioned fuel cell hydrogen supply device, can effectively prevent liquid water from accumulating at the anode inlet of the fuel cell stack, thus affecting the normal operation of the fuel cell stack and helping to ensure the reliability and stability of the system.

[0062] In addition, this embodiment also proposes a fuel cell vehicle equipped with the fuel cell system described above.

[0063] The fuel cell vehicle of this embodiment has all the beneficial effects of the aforementioned fuel cell system, which will not be repeated here.

[0064] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fuel cell hydrogen supply device, characterized in that: It includes a gas-liquid separator (1), an ejector (3) and a water storage box (4) disposed on one side of the gas-liquid separator (1); The gas-liquid separator (1) is provided with a separation port (103) and a drain port (102) at its upper and lower ends, respectively, and a tail gas inlet (101) is provided on the side of the gas-liquid separator (1). The tail gas inlet (101) is used to connect with the anode outlet of the fuel cell stack. The ejector (3) is arranged vertically, and the primary gas inlet of the ejector (3) is used to connect with the hydrogen supply pipeline, the secondary gas inlet of the ejector (3) is connected with the separation port (103), and the gas outlet of the ejector (3) is used to connect with the anode inlet of the fuel cell stack. The water storage box (4) is located at the bottom of the ejector (3) and is connected to the ejector (3) and the gas-liquid separator (1).

2. The fuel cell hydrogen supply device according to claim 1, characterized in that: It also includes a circulation pump (2) located above the gas-liquid separator (1), the inlet of the circulation pump (2) being connected to the separation port (103), and the outlet of the circulation pump (2) being connected to the secondary gas inlet of the ejector (3).

3. The fuel cell hydrogen supply device according to claim 1, characterized in that: The water storage box (4) is provided with a guide plate (5). One end of the guide plate (5) is connected to the side wall of one side of the water storage box (4), and the other end is inclined towards the bottom of the water storage box (4), forming a gap between the guide plate (5) and the other side wall of the water storage box (4) for airflow to pass through.

4. The fuel cell hydrogen supply device according to claim 3, characterized in that: The guide plates (5) are multiple ones that are spaced apart in the water storage box (4) along the vertical direction; Multiple guide plates (5) are alternately connected to the two side walls of the water storage box (4).

5. The fuel cell hydrogen supply device according to claim 3, characterized in that: It also includes a connecting pipe (6), and the bottom of the water storage box (4) is provided with a drain outlet, which is connected to the gas-liquid separator (1) through the connecting pipe (6); The connecting pipe (6) is inclined downward in a direction away from the water storage box (4).

6. The fuel cell hydrogen supply device according to any one of claims 1 to 5, characterized in that: The ejector (3) is provided with an outlet pipe (7) that communicates with the outlet, and the outlet pipe (7) is used to communicate with the anode inlet of the fuel cell stack. The air outlet pipe (7) is provided with a baffle (8). One end of the baffle (8) is connected to the side wall of the air outlet pipe (7), and the other end is inclined away from the ejector (3), forming a space for airflow between the baffle (8) and the other side wall of the air outlet pipe (7).

7. The fuel cell hydrogen supply device according to claim 6, characterized in that: The baffles (8) are multiple baffles spaced apart along the length of the air outlet pipe (7); Multiple baffles (8) are alternately connected to the two side walls of the air outlet pipe (7).

8. The fuel cell hydrogen supply device according to claim 6, characterized in that: The exhaust pipe (7) is inclined upward in a direction away from the ejector (3).

9. A fuel cell system, characterized in that: The fuel cell system includes a fuel cell stack and a fuel cell hydrogen supply device according to any one of claims 1 to 8.

10. A fuel cell vehicle, characterized in that: The fuel cell vehicle is equipped with the fuel cell system as described in claim 9.

Images