Fuel cell system and method for retarding corrosion of hydrogen-air interface of fuel cell system

Abstract

The invention discloses a fuel cell system and a method for slowing down hydrogen-air interface corrosion thereof.The fuel cell system comprises an electric pile body, an air supply system, a hydrogen supply system and a fuel recirculation device, an air pile outlet pipeline is communicated with a cathode outlet, the air supply system is communicated with a cathode inlet through an air pile inlet pipeline, and the hydrogen supply system is communicated with a fuel inlet through a fuel recirculation device; the hydrogen supply system is communicated with the anode inlet through a hydrogen reactor inlet pipeline; the anode outlet is communicated with the air reactor outlet pipeline through a first hydrogen reactor outlet pipeline, the inlet end of the fuel recycling device is communicated with the first hydrogen reactor outlet pipeline through a second hydrogen reactor outlet pipeline, the outlet end of the fuel recycling device is communicated with the hydrogen reactor inlet pipeline, the volume of the hydrogen reactor inlet pipeline is V1, the volume of the first hydrogen reactor outlet pipeline is V2, the volume of the second hydrogen stack outlet pipeline is V3, the volume of the stack body is V4, and V1 + V4 is less than or equal to V2 + V3, so that the fuel cell system can enable hydrogen / air wavefront to pass through the stack more quickly, and the cathode corrosion time is shortened.

Description

Technical Field

[0001] The invention belongs to the technical field of fuel cells, and in particular relates to a fuel cell system and a method for alleviating corrosion of its hydrogen-air interface. Background Art

[0002] If a fuel cell stack is shut down for a long period of time (hours to days), air will eventually diffuse into the cathode and anode of the fuel cell. Over time, the residual hydrogen from the previous shutdown is consumed and the fuel cell balances to a state where there is air at both the anode and cathode. It is well known that corrosion currents are generated when hydrogen is reintroduced into the system at startup. These corrosion currents degrade the cathode catalyst and substrate, causing performance loss with each cycle. Current related technologies usually use rapid hydrogen filling methods to mitigate this type of corrosion, but rapid hydrogen filling usually requires a large amount of hydrogen purge, which may not meet emission requirements.

[0003] Therefore, the existing fuel cell system shutdown control method needs to be improved. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art to at least some extent. To this end, one object of the present invention is to provide a fuel cell system and a method for mitigating hydrogen-air interface corrosion thereof, which can make the hydrogen / air wave front pass through the stack faster without continuous or external fuel side purge, thereby shortening the cathode corrosion time and not violating emission requirements by purge.

[0005] In a first aspect of the present invention, the present invention provides a fuel cell system. According to an embodiment of the present invention, the fuel cell system comprises:

[0006] A battery stack body, the battery stack body comprising a cathode inlet, a cathode outlet, an anode inlet and an anode outlet;

[0007] Air inlet pipe;

[0008] An air out-of-stack pipeline, the air out-of-stack pipeline is connected to the cathode outlet;

[0009] an air supply system, the air supply system being connected to the cathode inlet through the air inlet pipeline;

[0010] Hydrogen supply system;

[0011] A hydrogen inlet pipeline, through which the hydrogen supply system is connected to the anode inlet;

[0012] a first hydrogen out-of-stack pipeline, through which the anode outlet is connected to the air out-of-stack pipeline;

[0013] The second hydrogen outlet pipeline;

[0014] a fuel recirculation device, wherein the inlet end of the fuel recirculation device is connected to the first hydrogen out-of-stack pipeline through the second hydrogen out-of-stack pipeline, and the outlet end of the fuel recirculation device is connected to the hydrogen in-stack pipeline;

[0015] Among them, the volume of the hydrogen inlet pipeline is V1, the volume of the first hydrogen outlet pipeline is V2, the volume of the second hydrogen outlet pipeline is V3, the volume of the fuel cell stack body is V4, and V1+V4≤V2+V3.

[0016] According to the fuel cell system of an embodiment of the present invention, by designing the volume V1 of the hydrogen inlet pipeline, the volume V3 of the first hydrogen outlet pipeline, the volume V3 of the second hydrogen outlet pipeline, and the volume V4 of the stack body to satisfy V1+V4≤V2+V3, the fuel cell system can make the hydrogen / air wave front pass through the stack faster without continuous or external fuel side purge, thereby shortening the cathode corrosion time and not violating emission requirements through purge.

[0017] In addition, the fuel cell system according to the above embodiment of the present invention may also have the following additional technical features:

[0018] In some embodiments of the present invention, V1+V4≤V2+V3 is achieved by adjusting at least one of the following variables: length of hydrogen inlet pipeline, length of first hydrogen outlet pipeline, and length of second hydrogen outlet pipeline.

[0019] In some embodiments of the present invention, V1+V4≤V2+V3 is achieved by adjusting at least one of the following variables: inner diameter of hydrogen inlet pipeline, inner diameter of first hydrogen outlet pipeline, inner diameter of second hydrogen outlet pipeline, anode inlet geometry, and anode outlet geometry.

[0020] In some embodiments of the present invention, V1+V4≤V2+V3 is achieved in a manner that the wavefront time is less than 1 second, where the wavefront time is the time taken for hydrogen to pass through the flow region of the fuel cell.

[0021] In some embodiments of the present invention, the fuel cell system further comprises: a hydrogen pressure regulating valve installed between the hydrogen supply system and the anode inlet.

[0022] In some embodiments of the present invention, the fuel cell system further comprises: a hydrogen purge valve connected between the anode outlet and the air out-of-stack pipeline.

[0023] In some embodiments of the present invention, the fuel cell system further comprises: a check valve, wherein the check valve is arranged between the outlet end of the fuel recycling device and the hydrogen inlet pipeline.

[0024] In some embodiments of the present invention, the stack body is provided with a coolant inlet and a coolant outlet, the coolant inlet is provided with a coolant inlet pipeline that can be connected to a coolant supply system, and the coolant outlet is provided with a coolant outlet pipeline.

[0025] In a second aspect of the present invention, the present invention proposes a method for slowing down the hydrogen-air interface corrosion of the above-mentioned fuel cell system. According to an embodiment of the present invention, the method includes: increasing the hydrogen supply pressure, and adjusting at least one of the volume V1 of the hydrogen inlet pipeline, the volume V2 of the first hydrogen outlet pipeline, the volume V3 of the second hydrogen outlet pipeline, and the volume V4 of the stack body so that V1+V4≤V2+V3.

[0026] The inventors discovered that by designing the volume V1 of the hydrogen inlet pipeline, the volume V3 of the first hydrogen outlet pipeline, the volume V3 of the second hydrogen outlet pipeline, and the volume V4 of the stack body to satisfy V1+V4≤V2+V3, and increasing the hydrogen supply pressure at the same time, the fuel cell system can allow the hydrogen / air wave front to pass through the stack faster without the need for continuous or external fuel-side purging, thereby shortening the cathode corrosion time and not violating emission requirements through purging.

[0027] In addition, the above method according to the above embodiment of the present invention may also have the following additional technical features:

[0028] In some embodiments of the present invention, the fuel cell system includes a hydrogen pressure regulating valve, which is installed between the hydrogen supply system and the anode inlet, and the hydrogen supply pressure is increased by the hydrogen pressure regulating valve.

[0029] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] Figure 1 is a result schematic diagram of a fuel cell system according to an embodiment of the present invention;

[0032] Figure 2 is a schematic diagram of a monolithic membrane electrode according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The present invention is based on the following discovery of the inventors: after the fuel cell system is shut down, if there is residual hydrogen and oxygen in the stack, auxiliary components and pipelines, due to the existence of concentration gradient, the oxygen on the cathode side can penetrate to the anode side through the proton exchange membrane, or the oxygen in the environment can slowly penetrate to the anode side through the sealing ring, forming a hydrogen / air interface on the anode side. At this time, one side of the membrane electrode is full of air, and the other side has both air and hydrogen, so a high potential will be generated, causing serious corrosion to the carbon carrier. The corrosion damage of the hydrogen-air interface is mainly on the cathode side. After the carbon carrier is corroded, platinum will fall off, the three-phase interface will be damaged, and finally the performance of the fuel cell will seriously decline. Its severity far exceeds the life decay caused by high potential in the actual operation of the fuel cell.

[0038] It should be noted that the volume of the pipeline described below specifically refers to the product of the cross-sectional area of ​​the pipeline and the length of the pipeline, which will not be repeated hereafter.

[0039] In a first aspect of the present invention, the present invention provides a fuel cell system. According to an embodiment of the present invention, referring to Figure 1 The fuel cell system comprises: a stack body 100, an air supply system 200, a hydrogen supply system 300, and a fuel recycling device 400. The stack body 100 comprises a cathode inlet 11, a cathode outlet 12, an anode inlet 13, and an anode outlet 14. The air supply system 200 is connected to the cathode inlet 11 through an air inlet pipeline 21, and is suitable for providing air to the cathode through the air inlet pipeline 21. The air outlet pipeline 22 is connected to the cathode outlet 12, and is suitable for discharging excess air and generated water, etc. The hydrogen supply system 300 is connected to the anode inlet 13 through the hydrogen inlet pipeline 31. The anode outlet 14 is connected to the air outlet pipeline 22 through the first hydrogen outlet pipeline 32, and the inlet end of the fuel recycling device 400 is connected to the first hydrogen outlet pipeline 32 through the second hydrogen outlet pipeline 33, and the outlet end of the fuel recycling device 400 is connected to the hydrogen inlet pipeline 31, and is suitable for recycling the unreacted hydrogen in the stack to the hydrogen inlet of the stack, thereby improving the utilization rate of hydrogen and hydrogen-related safety. At the same time, the water generated by the electrochemical reaction inside the stack is also circulated to the inlet of the fuel cell stack to improve the moisture level of the stack. Among them, the volume of the hydrogen inlet pipeline 13 is V1, the volume of the first hydrogen outlet pipeline 32 is V2, the volume of the second hydrogen outlet pipeline 33 is V3, and the volume of the stack body 100 is V4. The inventor found that if Figure 2As shown, it is a schematic diagram of a single-piece membrane electrode, showing the reaction area of ​​the membrane electrode and the critical wavelength straight-line distance d. The faster the hydrogen / air wavefront passes through the critical wavelength straight-line distance, the shorter the time the cathode is in a corrosive state. This application shortens the wavefront time of hydrogen / air passing through the critical wavelength straight-line distance by making V1+V4≤V2+V3, so that the hydrogen / air wavefront passes through the stack faster without continuous or external fuel-side purging, thereby shortening the cathode corrosion time, and will not violate emission requirements by purging. It should be noted that those skilled in the art can select the specific types of the stack body 100, air supply system 200, hydrogen supply system 300, and fuel recirculation device 400 according to actual needs, as long as the above functions can be achieved.

[0040] Further, V1+V4≤V2+V3 is achieved by adjusting at least one of the following variables: the length of the hydrogen inlet pipeline 31, the length of the first hydrogen outlet pipeline 32, and the length of the second hydrogen outlet pipeline 33. For example, the length of the first hydrogen outlet pipeline 32 may be increased, or the length of the second hydrogen outlet pipeline 33 may be increased, or the length of the first hydrogen outlet pipeline 32 and the length of the second hydrogen outlet pipeline 33 may be increased at the same time.

[0041] Further, V1+V4≤V2+V3 is achieved by adjusting at least one of the following variables: the inner diameter of the hydrogen inlet pipeline 31, the inner diameter of the first hydrogen outlet pipeline 32, the inner diameter of the second hydrogen outlet pipeline 33, the geometric shape of the anode inlet 13, and the geometric shape of the anode outlet 14. For example, the inner diameter of the first hydrogen outlet pipeline 32 can be made larger than the inner diameter of the hydrogen inlet pipeline 31, or the inner diameter of the second hydrogen outlet pipeline 33 can be made larger than the inner diameter of the hydrogen inlet pipeline 31, or the inner diameter of the first hydrogen outlet pipeline 32 and the inner diameter of the second hydrogen outlet pipeline 33 can be made larger than the inner diameter of the hydrogen inlet pipeline 31, or the anode inlet 13 can be made smaller than the anode outlet 14. It should be noted that the area of ​​the anode inlet 13 matches the cross-sectional area of ​​the hydrogen inlet pipeline 31, and the area of ​​the anode outlet 14 matches the cross-sectional area of ​​the first hydrogen outlet pipeline 32.

[0042] Further, V1+V4≤V2+V3 is achieved in a manner where the wavefront time is less than 1 second, where the wavefront time is the time taken by hydrogen to pass through the flow region of the fuel cell. That is to say, by making V1+V4≤V2+V3, the wavefront time for hydrogen / air to pass through the critical wavelength straight-line distance can be designed to occur within 1 second, so that the hydrogen / air wavefront passes through the stack faster without continuous or external fuel-side purge, thereby shortening the cathode corrosion time, and not violating emission requirements through purge.

[0043] Furthermore, the above-mentioned fuel cell system also includes: a hydrogen pressure regulating valve 301, which is installed between the hydrogen supply system 300 and the anode inlet 13. Therefore, the hydrogen pressure regulating valve 301 can be used to increase the hydrogen supply pressure, and by adjusting the combination of the hydrogen supply pressure and the volume of the anode inlet pipeline and the outlet pipeline, it is beneficial to further shorten the wavefront time of hydrogen / air passing through the critical wavelength straight-line distance, and slow down the corrosion of the cathode by the hydrogen-air interface. It should be noted that when the above-mentioned hydrogen pressure regulating valve 301 is provided, the above-mentioned hydrogen inlet pipeline 13 is a connecting pipeline between the hydrogen pressure regulating valve 301 and the anode inlet 13, and the volume V1 of the hydrogen inlet pipeline 13 corresponds to the pipeline volume between the hydrogen pressure regulating valve 301 and the anode inlet 13. Those skilled in the art can select the specific type of the hydrogen pressure regulating valve 301 according to actual needs, as long as the above-mentioned functions can be achieved.

[0044] Furthermore, the above-mentioned fuel cell system also includes: a hydrogen purge valve 302, which is connected between the anode outlet 14 and the air out-of-stack pipeline 22. Thus, under the action of the hydrogen purge valve 302, hydrogen can pass through the stack faster, and the hydrogen wave front time can be kept below 1.0 second by adjusting the hydrogen supply pressure and the volume of the anode inlet and outlet pipelines, thereby reducing cathode corrosion damage. It should be noted that when the above-mentioned hydrogen purge valve 302 is provided, the first hydrogen out-of-stack pipeline 32 is a connecting pipeline between the anode outlet 14 and the hydrogen purge valve 302, and the volume V2 of the first hydrogen out-of-stack pipeline 32 corresponds to the pipeline volume between the anode outlet 14 and the hydrogen purge valve 302. Those skilled in the art can select the specific type of hydrogen purge valve 302 according to actual needs, as long as the above-mentioned functions can be achieved.

[0045] Furthermore, the above-mentioned fuel cell system further includes: a check valve 303, which is arranged between the outlet end of the fuel recirculation device 400 and the hydrogen inlet pipeline 31. Thus, the check valve 303 can prevent gas backflow. It should be noted that those skilled in the art can select the specific type of the check valve 303 according to actual needs, as long as the above-mentioned function can be achieved.

[0046] Furthermore, a coolant inlet (not shown) and a coolant outlet (not shown) are provided on the stack body 100. The coolant inlet is provided with a coolant inlet pipeline (not shown) that can be connected to the coolant supply system (not shown), and the coolant outlet is provided with a coolant outlet pipeline (not shown). In this way, it can be ensured that the fuel cell system operates within a suitable temperature range to ensure a high power supply efficiency. It should be noted that the specific positions of the coolant inlet and the coolant outlet belong to the conventional technology in this field, and those skilled in the art can select the specific type of the coolant supply system according to actual needs, as long as the above functions can be achieved.

[0047] The fuel cell system of the present application includes a fuel cell stack body, an air supply system, a hydrogen supply system, and a fuel recycling device. The cathode inlet of the fuel cell stack body is connected to the air supply system through an air inlet pipeline, and the cathode outlet is provided with an air outlet pipeline. The anode inlet is connected to one end of a hydrogen pressure regulating valve through a hydrogen inlet pipeline, and the other end of the hydrogen pressure regulating valve is connected to the hydrogen supply system. The anode outlet is connected to one end of a hydrogen purge valve through a first hydrogen outlet pipeline, and the other end of the hydrogen purge valve is connected to the above-mentioned air outlet pipeline. The inlet end of the above-mentioned fuel recycling device is connected to the first hydrogen outlet pipeline through a second hydrogen outlet pipeline, and the outlet end is connected to the above-mentioned hydrogen inlet pipeline, and a check valve is provided at the connection between the outlet end and the hydrogen inlet pipeline. The volume of the hydrogen inlet pipeline between the hydrogen pressure regulating valve and the anode inlet is V1, the volume of the first hydrogen outlet pipeline between the anode outlet and the hydrogen purge valve is V2, the volume of the second hydrogen outlet pipeline between the inlet end of the fuel recirculation device and the first hydrogen outlet pipeline is V3, and the volume of the stack body is V4. The present application shortens the wavefront time of hydrogen / air passing through the critical wavelength straight-line distance by designing V1+V4≤V2+V3, and by adjusting the above-mentioned hydrogen pressure regulating valve to increase the hydrogen supply pressure, and coordinating the purge effect of the hydrogen purge valve. Under ideal conditions, the wavefront time can be kept below 1.0 second, so that the hydrogen / air wavefront can pass through the stack faster without continuous or external fuel side purge, thereby shortening the cathode corrosion time and not violating emission requirements through purge.

[0048] In a second aspect of the present invention, the present invention proposes a method for slowing down the hydrogen-air interface corrosion of the above-mentioned fuel cell system. According to an embodiment of the present invention, the method includes: increasing the hydrogen supply pressure, and adjusting at least one of the volume V1 of the hydrogen inlet pipeline, the volume V2 of the first hydrogen outlet pipeline, the volume V3 of the second hydrogen outlet pipeline, and the volume V4 of the stack body so that V1+V4≤V2+V3.

[0049] The inventors found that by increasing the hydrogen supply pressure and adjusting at least one of the volume V1 of the hydrogen inlet pipeline, the volume V2 of the first hydrogen outlet pipeline, the volume V3 of the second hydrogen outlet pipeline, and the volume V4 of the stack body so that V1+V4≤V2+V3, it is beneficial to further shorten the wavefront time of hydrogen / air passing through the critical wavelength straight-line distance, and make the hydrogen / air wavefront pass through the stack faster without continuous or external fuel-side purging, thereby shortening the cathode corrosion time, and will not violate emission requirements by purging. Specifically, the fuel cell system includes a hydrogen pressure regulating valve, which is installed between the hydrogen supply system and the anode inlet, and the hydrogen supply pressure can be increased by the hydrogen pressure regulating valve.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0051] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A fuel cell system, characterized in that: include: A battery stack body, the battery stack body comprising a cathode inlet, a cathode outlet, an anode inlet and an anode outlet; Air inlet pipe; An air out-of-stack pipeline, the air out-of-stack pipeline is connected to the cathode outlet; an air supply system, the air supply system being connected to the cathode inlet through the air inlet pipeline; Hydrogen supply system; A hydrogen inlet pipeline, through which the hydrogen supply system is connected to the anode inlet; a first hydrogen out-of-stack pipeline, through which the anode outlet is connected to the air out-of-stack pipeline; The second hydrogen outlet pipeline; a fuel recirculation device, wherein the inlet end of the fuel recirculation device is connected to the first hydrogen out-of-stack pipeline through the second hydrogen out-of-stack pipeline, and the outlet end of the fuel recirculation device is connected to the hydrogen in-stack pipeline; Among them, the volume of the hydrogen inlet pipeline is V1, the volume of the first hydrogen outlet pipeline is V2, the volume of the second hydrogen outlet pipeline is V3, the volume of the fuel cell stack body is V4, and V1+V4≤V2+V3.

2. The fuel cell system according to claim 1, characterized in that: V1+V4≤V2+V3 is achieved by adjusting at least one of the following variables: the length of the hydrogen inlet pipeline, the length of the first hydrogen outlet pipeline, and the length of the second hydrogen outlet pipeline.

3. The fuel cell system according to claim 1, characterized in that: V1+V4≤V2+V3 is achieved by adjusting at least one of the following variables: inner diameter of hydrogen inlet pipeline, inner diameter of first hydrogen outlet pipeline, inner diameter of second hydrogen outlet pipeline, anode inlet geometry, and anode outlet geometry.

4. The fuel cell system according to claim 1, characterized in that: V1+V4≤V2+V3 is achieved in a manner that the wavefront time is less than 1 second, the wavefront time being the time taken for hydrogen to pass through the flow region of the fuel cell.

5. The fuel cell system according to claim 1, characterized in that: Also includes: A hydrogen pressure regulating valve is installed between the hydrogen supply system and the anode inlet.

6. The fuel cell system according to claim 1, characterized in that: Also includes: A hydrogen purge valve is connected between the anode outlet and the air out-of-stack pipeline.

7. The fuel cell system according to claim 1, characterized in that: Also includes: A check valve is arranged between the outlet end of the fuel recirculation device and the hydrogen inlet pipeline.

8. The fuel cell system according to claim 1, characterized in that: The stack body is provided with a coolant inlet and a coolant outlet. The coolant inlet is provided with a coolant inlet pipeline that can be communicated with a coolant supply system, and the coolant outlet is provided with a coolant outlet pipeline.

9. A method for slowing down hydrogen-air interface corrosion in a fuel cell system according to any one of claims 1 to 8, characterized in that: Increase the hydrogen supply pressure, and adjust at least one of the volume V1 of the hydrogen inlet pipeline, the volume V2 of the first hydrogen outlet pipeline, the volume V3 of the second hydrogen outlet pipeline, and the volume V4 of the stack body so that V1+V4≤V2+V3.

10. The method for preventing hydrogen-air interface corrosion in a fuel cell system according to claim 9, characterized in that: The fuel cell system comprises a hydrogen pressure regulating valve, which is installed between the hydrogen supply system and the anode inlet, and the hydrogen supply pressure is increased by the hydrogen pressure regulating valve.

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