Fuel cell air system and fuel cell

Abstract

The utility model relates to the technical field of fuel cells, and discloses a fuel cell air system and a fuel cell. The air compressor is provided with a first air outlet and a first air inlet, and the first air inlet is communicated with the electric pile; the intercooler is communicated with the first air outlet, and the intercooler is communicated with the electric pile; the bypass structure is provided with a second air inlet and a second air outlet, the second air inlet is arranged between the air compressor and the intercooler in a communicating mode, the second air inlet is suitable for being communicated with the first air outlet, the second air outlet is arranged between the electric pile and the air compressor, and the second air outlet is suitable for being communicated with the first air inlet. The first air outlet and the first air inlet are communicated through the bypass structure in the shutdown state of the fuel cell, so that the vortex front part of the air compressor is purged, bypass gas is not cooled by the intercooler, heat dissipation loss of a cooling system is reduced, and the service life of the air compressor is prolonged. And the bypass gas with higher temperature can more quickly purge moisture in front of the vortex of the air compressor in the shutdown process.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a fuel cell air system and a fuel cell. Background Art

[0002] Fuel cells have a high energy conversion efficiency and emit extremely few harmful gases, and are now widely used in various fields such as vehicles, power supplies, and electronic products. In a high-power proton exchange membrane fuel cell system, a relatively advanced energy recovery type air compressor with a turboexpander is usually adopted to reduce the power consumption of the air compressor, improve the efficiency of the system, and reduce the hydrogen consumption during the operation of the whole vehicle.

[0003] In the prior art, a bypass valve is usually arranged at the rear end of the intercooler to prevent the air compressor from surging and reduce the hydrogen concentration in the tail exhaust during shutdown and purging. However, the setting of such a bypass valve cannot achieve purging the moisture in front of the turbine during the shutdown stage of the fuel cell. Summary of the Utility Model

[0004] In view of this, the utility model provides a fuel cell air system and a fuel cell to solve the problem that the setting of the bypass valve cannot achieve purging the moisture in front of the turbine during the shutdown stage of the fuel cell.

[0005] In a first aspect, the utility model provides a fuel cell air system, including: a stack; an air compressor having a first air outlet and a first air inlet, the first air inlet being communicatively connected to the stack, and the air discharged from the stack being adapted to enter the air compressor through the first air inlet; an intercooler communicatively connected to the first air outlet, the air compressor being adapted to convey air to the intercooler, the intercooler being communicatively connected to the stack, and the intercooler being adapted to convey air to the stack; a bypass structure having a second air inlet and a second air outlet, the second air inlet being communicatively connected between the air compressor and the intercooler, the second air inlet being adapted to be communicatively connected to the first air outlet, the second air outlet being arranged between the stack and the air compressor, and the second air outlet being adapted to be communicatively connected to the first air inlet.

[0006] Beneficial effects: In the shutdown state of the fuel cell, the bypass structure is used to connect the first air outlet and the first air inlet to purge the part in front of the turbine of the air compressor. The gas in the bypass pipeline is not cooled by the intercooler, reducing the heat loss of the cooling system, and the gas in the bypass pipeline with a higher temperature can purge the moisture in front of the turbine of the air compressor faster during shutdown.

[0007] In an optional embodiment, the bypass structure includes a bypass pipeline and a bypass valve, the bypass valve being communicatively connected in the bypass pipeline, and the two ends of the bypass pipeline respectively form the second air inlet and the second air outlet.

[0008] Beneficial effects: By providing a bypass pipeline and a bypass valve, the bypass valve is used to control the connection between the first air outlet and the first air inlet in the shutdown state of the fuel cell.

[0009] In an alternative embodiment, the bypass structure includes a bypass pipeline and a three-way valve. The first working port of the three-way valve is connected to the first air outlet, the second working port of the three-way valve is connected to the intercooler, the third working port of the three-way valve is connected to the bypass pipeline, and both ends of the bypass pipeline respectively form the second air inlet and the second air outlet.

[0010] Beneficial effects: By providing a bypass pipeline and a three-way valve, the three-way valve is used to control the connection between the first air outlet and the first air inlet in the shutdown state of the fuel cell.

[0011] In an alternative embodiment, the fuel cell air system further includes a heat exchange structure, which includes a hot gas channel and a cold gas channel. Both ends of the hot gas channel are respectively connected to the first air outlet and the intercooler, and both ends of the cold gas channel are respectively connected to the fuel cell stack and the first air inlet.

[0012] Beneficial effects: Utilize the low-temperature gas between the first air inlet and the fuel cell stack to exchange heat with the high-temperature gas between the first air outlet and the intercooler, improving the energy utilization rate within the air system; can increase the intake temperature of the first air inlet, improve the energy recovery efficiency of the compressor turbine end, can vaporize part of the liquid water in the gas at the first air inlet, reduce the liquid water content entering the compressor turbine end, reduce the impact of normal-temperature liquid droplets and ice particles at low temperatures on the turbine, and improve the service life and reliability of the compressor; reduce the temperature of the air at the first air outlet, reduce the heat dissipation requirement for the intercooler, and reduce the opening degree and power consumption of the radiator.

[0013] In an alternative embodiment, the fuel cell air system further includes a heat exchange structure, and there are two heat exchange structures. One of the heat exchange structures is adapted to heat the air between the fuel cell stack and the first air inlet, and the other heat exchange structure is adapted to cool the air between the first air outlet and the intercooler.

[0014] Beneficial effects: Through the heat exchange structure, the intake temperature of the first air inlet can be increased, the energy recovery efficiency of the compressor turbine end can be improved, part of the liquid water in the gas at the first air inlet can be vaporized, the liquid water content entering the compressor turbine end can be reduced, the impact of normal-temperature liquid droplets and ice particles at low temperatures on the turbine can be reduced, and the service life and reliability of the compressor can be improved; the temperature of the air at the first air outlet can be reduced, the heat dissipation requirement for the intercooler can be reduced, and the opening degree and power consumption of the radiator can be reduced.

[0015] In an alternative embodiment, the fuel cell air system further includes a humidifier. The air discharged from the intercooler is adapted to be conveyed to the stack through the humidifier, and the air discharged from the stack is adapted to be conveyed to the first air inlet through the humidifier.

[0016] Advantageous effects: By providing a humidifier, the air at the air inlet of the stack is maintained at an appropriate humidity, ensuring good electrical conductivity and reaction activity of the proton exchange membrane, thereby improving the output power and efficiency of the fuel cell; the humidifier helps to maintain the internal temperature of the fuel cell, helps to reduce the damage of thermal stress to the components of the fuel cell, and further extends the service life of the battery.

[0017] In an alternative embodiment, the fuel cell air system further includes a back pressure valve. The back pressure valve is disposed between the humidifier and the air compressor, and the back pressure valve selectively communicates the humidifier with the first air inlet.

[0018] Advantageous effects: By providing a back pressure valve, the pressure in the pipeline between the humidifier and the air compressor is prevented from being too high, providing a stable pressure environment for the air path of the fuel cell stack, and improving the safety of the fuel cell air system.

[0019] In an alternative embodiment, the fuel cell air system further includes a filter. The air compressor includes an air inlet, and the filter is communicated with the air inlet.

[0020] Advantageous effects: By providing a filter, impurities in the air are removed, ensuring the normal operation of the air system and preventing the impurities from damaging the components in the air system.

[0021] In an alternative embodiment, the fuel cell air system further includes a flow meter. The flow meter is disposed between the filter and the air compressor, and the flow meter communicates the filter with the air inlet.

[0022] Advantageous effects: By providing a flow meter, it is used to measure the mass or volume of the air entering the air compressor, which helps to accurately grasp the air intake demand of the air compressor.

[0023] In a second aspect, the present invention further provides a fuel cell, including the above-mentioned fuel cell air system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 System structure diagram of the fuel cell according to the embodiment of the present utility model;

[0026] Figure 2 Schematic diagram of the channel connection of the fuel cell according to the embodiment of the present utility model.

[0027] Description of the reference numerals in the drawings:

[0028] 10. Stack; 20. Air compressor; 21. First air outlet; 22. First air inlet; 23. Tail exhaust port; 24. Air inlet; 30. Intercooler; 40. Bypass structure; 41. Bypass pipeline; 42. Bypass valve; 43. Second air inlet; 44. Second air outlet; 50. Heat exchange structure; 60. Humidifier; 61. Third air inlet, 62. Third air outlet; 63. Fourth air inlet; 64. Fourth air outlet; 70. Back pressure valve; 80. Filter; 90. Flow meter; 100. Hydrogen supply system; 110. Cooling system; 121. First channel; 122. Second channel; 123. Third channel; 124. Fourth channel; 131. Fifth channel; 132. Sixth channel; 133. Seventh channel; 141. Eighth channel; 142. Ninth channel; 143. Tenth channel; 144. Eleventh channel. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] The following combines Figure 1 and Figure 2 , and describes the embodiments of the present utility model.

[0031] According to an embodiment of the present invention, on the one hand, a fuel cell air system is provided, which includes a fuel cell stack 10, an air compressor 20, an intercooler 30, and a bypass structure 40. The air compressor 20 has a first air outlet 21 and a first air inlet 22. The first air inlet 22 is communicatively connected to the fuel cell stack 10, and the air discharged from the fuel cell stack 10 is adapted to enter the air compressor 20 through the first air inlet 22. The intercooler 30 is communicatively connected to the first air outlet 21. The air compressor 20 is adapted to deliver air to the intercooler 30. The intercooler 30 is communicatively connected to the fuel cell stack 10, and the intercooler 30 is adapted to deliver air to the fuel cell stack 10. The bypass structure 40 has a second air inlet 43 and a second air outlet 44. The second air inlet 43 is communicatively connected between the air compressor 20 and the intercooler 30. The second air inlet 43 is adapted to be communicatively connected to the first air outlet 21. The second air outlet 44 is arranged between the fuel cell stack 10 and the air compressor 20. The second air outlet 44 is adapted to be communicatively connected to the first air inlet 22.

[0032] When applying the fuel cell air system of this embodiment, in the shutdown state of the fuel cell, the bypass structure 40 is used to connect the first air outlet 21 and the first air inlet 22 to purge the front part of the compressor wheel of the air compressor 20. The gas in the bypass pipeline 41 is not cooled by the intercooler 30, reducing the heat loss of the cooling system 110. Moreover, the gas in the bypass pipeline 41 with a higher temperature can purge the moisture in front of the compressor wheel of the air compressor 20 faster during the shutdown process.

[0033] It should be noted that in the related art, a bypass valve 42 is usually provided at the rear end of the intercooler 30. When the bypass valve 42 is needed for anti-surge purging, after the intercooler 30 works, the air is delivered from the intercooler 30 to the bypass valve 42 and then from the bypass valve 42 to the air compressor 20. At this time, the air has been cooled by the intercooler 30 and the heat is lost. However, by using the fuel cell air system in this embodiment, directly connecting the first air outlet 21 of the air compressor 20 and the second air inlet 43 of the bypass structure 40 in the shutdown state can save energy.

[0034] Specifically, as Figure 2 shown, a first channel 121 is formed from the first air outlet 21 to the intercooler 30, and the second air inlet 43 of the bypass structure 40 is communicatively connected within the first channel 121; a second channel 122 is formed from the first air inlet 22 to the fuel cell stack 10, and the second air outlet 44 of the bypass structure 40 is communicatively connected within the second channel 122; a third channel 123 is formed from the intercooler 30 to the fuel cell stack 10.

[0035] Specifically, the air compressor 20 further includes a tail exhaust port 23 for discharging the mixed exhaust gas recovered by the air compressor 20 to the atmospheric environment.

[0036] It should be noted that the mixed exhaust gas discharged from the fuel cell stack 10 contains hydrogen, and the hydrogen concentration in the mixed exhaust gas cannot be too high to prevent explosion. The bypass structure 40 is used to connect the first air outlet 21 and the first air inlet 22 to allow a large amount of air to enter the second channel 122, which can reduce the hydrogen concentration in the mixed exhaust gas in the second channel 122.

[0037] In one embodiment, Figure 1 As shown, the bypass structure 40 includes a bypass pipeline 41 and a bypass valve 42. The bypass valve 42 is connected to the bypass pipeline 41. The two ends of the bypass pipeline 41 respectively form a second air inlet 43 and a second air outlet 44. By providing the bypass pipeline 41 and the bypass valve 42, the bypass valve 42 is used to realize the connection control of the first air outlet 21 and the first air inlet 22 when the fuel cell is shut down.

[0038] Specifically, when the fuel cell is in a normal working state, the bypass valve 42 is closed to block the connection between the first air outlet 21 and the first air inlet 22; when the fuel cell is in a shutdown state, the bypass valve 42 is opened, the first air outlet 21 is connected to the first air inlet 22, and the air output by the air compressor 20 purges the moisture remaining at the turbine end of the air compressor 20, while recovering the high-temperature output energy into the air compressor 20.

[0039] In other alternative embodiments, the bypass structure 40 includes a bypass pipeline 41 and a three-way valve, a first working port of the three-way valve is connected to the first air outlet 21, a second working port of the three-way valve is connected to the intercooler 30, and a third working port of the three-way valve is connected to the bypass pipeline 41, and two ends of the bypass pipeline 41 respectively form a second air inlet 43 and a second air outlet 44. By providing the bypass pipeline 41 and the three-way valve, the three-way valve is used to realize the control of the connection between the first air outlet 21 and the first air inlet 22 when the fuel cell is shut down.

[0040] Specifically, the first working port of the three-way valve is an inlet, and the second working port and the third working port are outlets. When the fuel cell is in a normal working state, the passage from the first working port to the second working port is opened, and the passage from the first working port to the third working port is closed, and the air output by the air compressor 20 is directly delivered to the intercooler 30; when the fuel cell is stopped, the three-way valve is adjusted to close the passage from the first working port to the second working port, and open the passage from the first working port to the third working port, and the air output by the air compressor 20 is returned to the first air inlet 22 of the air compressor 20 via the bypass line 41, so as to complete the purge of the moisture remaining at the turbine end of the air compressor 20, and at the same time recover the high-temperature output energy into the air compressor 20.

[0041] In one embodiment, Figure 1As shown in the figure, the fuel cell air system further includes a heat exchange structure 50. The heat exchange structure 50 includes a hot gas channel and a cold gas channel. The hot gas channel is disposed close to the cold gas channel. The two ends of the hot gas channel are respectively communicated with the first air outlet 21 and the intercooler 30, and the two ends of the cold gas channel are respectively communicated with the fuel cell stack 10 and the first air inlet 22. The low-temperature gas between the first air inlet 22 and the fuel cell stack 10 is used to exchange heat with the high-temperature gas between the first air outlet 21 and the intercooler 30, so as to improve the energy utilization rate in the air system; the intake temperature of the first air inlet 22 can be increased, the energy recovery efficiency of the turbine end of the air compressor 20 can be improved, part of the liquid water in the gas at the first air inlet 22 can be vaporized, the liquid water content entering the turbine end of the air compressor 20 can be reduced, the impact of normal-temperature liquid droplets and ice particles at low temperature on the turbine can be reduced, and the service life and reliability of the air compressor 20 can be improved; the temperature of the air at the first air outlet 21 can be reduced, the heat dissipation requirement for the intercooler 30 can be reduced, and the opening degree and power consumption of the radiator can be reduced.

[0042] Specifically, the heat exchange structure 50 is a gas-gas heat exchanger. The hot gas channel forms a part of the first channel 121, and the cold gas channel forms a part of the second channel 122.

[0043] It should be noted that by reducing the temperature of the air in the first channel 121 through the heat exchange structure 50, the components in the bypass structure 40 are also protected, preventing the bypass structure 40 from being in a high-temperature environment for a long time.

[0044] It should be noted that in the related art, a water separator is often provided on the second channel 122 to reduce the liquid water content at the turbine end of the air compressor 20. However, in this embodiment, by providing the heat exchange structure 50, while realizing the function of the water separator, the air output from the first air outlet 21 of the air compressor 20 can be cooled, reducing the cost of the air system.

[0045] It should be noted that in this embodiment, a water separator can also be provided on the second channel 122 to further reduce the liquid water content at the turbine end of the air compressor 20.

[0046] In other alternative embodiments, the fuel cell air system further includes a heat exchange structure 50. There are two heat exchange structures 50. One of the heat exchange structures 50 is adapted to heat the air between the fuel cell stack 10 and the first air inlet 22, and the other heat exchange structure 50 is adapted to cool the air between the first air outlet 21 and the intercooler 30. Through the heat exchange structure 50, the intake air temperature of the first air inlet 22 can be increased, the energy recovery efficiency of the turbine end of the air compressor 20 can be improved, part of the liquid water in the gas at the first air inlet 22 can be vaporized, the liquid water content entering the turbine end of the air compressor 20 can be reduced, the impact of normal temperature droplets and ice particles at low temperature on the turbine can be reduced, and the service life and reliability of the air compressor 20 can be improved; the temperature of the air at the first air outlet 21 can be reduced, the heat dissipation requirement for the intercooler 30 can be reduced, and the opening degree and power consumption of the radiator can be reduced.

[0047] Specifically, one of the heat exchange structures 50 cools the air in the first channel 121, and the other heat exchange structure 50 heats the air in the second channel 122.

[0048] Specifically, the heat exchange structure 50 can be a gas-liquid heat exchanger or a gas-gas heat exchanger, and the heat exchange structure 50 selects media at different temperatures according to different functional requirements.

[0049] In one embodiment, as Figure 1 shown, the fuel cell air system further includes a humidifier 60. The humidifier 60 includes a third air inlet 61, a third air outlet 62, a fourth air inlet 63, and a fourth air outlet 64. The third air inlet 61 is connected to the intercooler 30 and the third air outlet 62, the third air outlet 62 is connected to the fuel cell stack 10, the fourth air inlet 63 is connected to the fuel cell stack 10 and the fourth air outlet 64, and the fourth air outlet 64 is connected to the first air inlet 22. By providing the humidifier 60, the air at the inlet of the fuel cell stack 10 is maintained at an appropriate humidity, ensuring good conductivity and reaction activity of the proton exchange membrane, thereby improving the output power and efficiency of the fuel cell; the humidifier 60 helps to maintain the internal temperature of the fuel cell, helps to reduce the damage of thermal stress to the components of the fuel cell, and further extends the service life of the battery.

[0050] Specifically, an intake air channel of the humidifier 60 is formed between the third air inlet 61 and the third air outlet 62, and the intake air channel forms a part of the third channel 123; an outlet air channel of the humidifier 60 is formed between the fourth air inlet 63 and the fourth air outlet 64, and the outlet air channel forms a part of the second channel 122.

[0051] In one embodiment, as Figure 1As shown, the fuel cell air system further includes a back pressure valve 70. The back pressure valve 70 is disposed between the humidifier 60 and the air compressor 20, and the back pressure valve 70 selectively communicates with the humidifier 60 and the first air inlet 22. By providing the back pressure valve 70, excessive pressure in the pipeline between the humidifier 60 and the air compressor 20 is prevented, a stable pressure environment is provided for the air path of the fuel cell stack, and the safety of the fuel cell air system is improved.

[0052] Specifically, when the bypass valve 42 is used in the fuel cell shutdown state, the back pressure valve 70 is closed, and the air flow between the intercooler 30 and the back pressure valve 70 stops.

[0053] In one embodiment, as Figure 1 shown, the fuel cell air system further includes a filter 80. The air compressor 20 includes an air inlet 24, and the filter 80 communicates with the air inlet 24. By providing the filter 80, impurities in the air are removed, the normal operation of the air system is ensured, and damage to each component in the air system caused by impurities is prevented.

[0054] Specifically, as Figure 2 shown, an air inlet 24 to the filter 80 forms a fourth channel 124.

[0055] In one embodiment, as Figure 1 shown, the fuel cell air system further includes a flow meter 90. The flow meter 90 is disposed between the filter 80 and the air compressor 20, and the flow meter 90 communicates with the filter 80 and the air inlet 24. By providing the flow meter 90, it is used to measure the mass or volume of the air entering the air compressor 20, which helps to accurately grasp the air intake requirement of the air compressor 20.

[0056] Specifically, the flow meter 90 communicates within the fourth channel 124.

[0057] According to an embodiment of the present invention, on the other hand, a fuel cell is further provided, including the above fuel cell air system.

[0058] In one embodiment, as Figure 1 shown, the fuel cell further includes a hydrogen supply system 100. The hydrogen supply system 100 communicates with the fuel cell stack 10 and forms a loop.

[0059] Specifically, as Figure 2 shown, the hydrogen supply system 100 supplies hydrogen to the fuel cell stack 10 through a fifth channel 131. The fuel cell stack 10 exhausts gas to the hydrogen supply system 100 through a sixth channel 132, and the fuel cell stack 10 performs tail gas discharge through a seventh channel 133.

[0060] In one embodiment, as Figure 1As shown, the fuel cell further includes a cooling system 110. The cooling system 110 is connected to the stack 10 to form a loop, and the cooling system 110 is also connected to the intercooler 30 to form a loop.

[0061] Specifically, as Figure 2 shown, the cooling system 110 delivers a cooling medium to the stack 10 through the eighth channel 141, and the cooling medium returns to the cooling system 110 through the ninth channel 142 after passing through the stack 10.

[0062] Specifically, as Figure 2 shown, the cooling system 110 delivers a cooling medium to the intercooler 30 through the tenth channel 143, and the cooling medium returns to the cooling system 110 through the eleventh channel 144 after passing through the intercooler 30.

[0063] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A fuel cell air system, characterized in that: include: Battery stack (10); An air compressor (20) having a first air outlet (21) and a first air inlet (22), wherein the first air inlet (22) is connected to the fuel cell stack (10), and air discharged from the fuel cell stack (10) is suitable for entering the air compressor (20) through the first air inlet (22); an intercooler (30), the intercooler (30) being in communication with the first air outlet (21), the air compressor (20) being suitable for conveying air to the intercooler (30), the intercooler (30) being in communication with the fuel cell stack (10), and the intercooler (30) being suitable for conveying air to the fuel cell stack (10); The bypass structure (40) has a second air inlet (43) and a second air outlet (44); the second air inlet (43) is arranged between the air compressor (20) and the intercooler (30); the second air inlet (43) is suitable for being connected to the first air outlet (21); the second air outlet (44) is arranged between the fuel cell stack (10) and the air compressor (20); the second air outlet (44) is suitable for being connected to the first air inlet (22).

2. The fuel cell air system according to claim 1, characterized in that: The bypass structure (40) comprises a bypass pipeline (41) and a bypass valve (42); the bypass valve (42) is connected to the bypass pipeline (41); and the second air inlet (43) and the second air outlet (44) are respectively formed at two ends of the bypass pipeline (41).

3. The fuel cell air system according to claim 1, characterized in that: The bypass structure (40) comprises a bypass pipeline (41) and a three-way valve, wherein a first working port of the three-way valve is connected to the first air outlet (21), a second working port of the three-way valve is connected to the intercooler (30), and a third working port of the three-way valve is connected to the bypass pipeline (41), and the two ends of the bypass pipeline (41) respectively form the second air inlet (43) and the second air outlet (44).

4. The fuel cell air system according to any one of claims 1 to 3, characterized in that: The fuel cell air system further comprises a heat exchange structure (50), wherein the heat exchange structure (50) comprises a hot air channel and a cold air channel, wherein two ends of the hot air channel are respectively connected to the first air outlet (21) and the intercooler (30), and two ends of the cold air channel are respectively connected to the fuel cell stack (10) and the first air inlet (22).

5. The fuel cell air system according to any one of claims 1 to 3, characterized in that: The fuel cell air system also includes a heat exchange structure (50), wherein two heat exchange structures (50) are provided, wherein one of the heat exchange structures (50) is suitable for heating the air between the fuel cell stack (10) and the first air inlet (22), and the other heat exchange structure (50) is suitable for cooling the air between the first air outlet (21) and the intercooler (30).

6. The fuel cell air system according to any one of claims 1 to 3, characterized in that: The fuel cell air system further comprises a humidifier (60), the air exhausted from the intercooler (30) is suitable for being transported to the fuel cell stack (10) through the humidifier (60), and the air exhausted from the fuel cell stack (10) is suitable for being transported to the first air inlet (22) through the humidifier (60).

7. The fuel cell air system according to claim 6, characterized in that: The fuel cell air system further comprises a back pressure valve (70), wherein the back pressure valve (70) is arranged between the humidifier (60) and the air compressor (20), and the back pressure valve (70) can selectively connect the humidifier (60) and the first air inlet (22).

8. The fuel cell air system according to any one of claims 1 to 3, characterized in that: The fuel cell air system further comprises a filter (80), the air compressor (20) comprises an air inlet (24), and the filter (80) is in communication with the air inlet (24).

9. The fuel cell air system according to claim 8, characterized in that: The fuel cell air system further comprises a flow meter (90), wherein the flow meter (90) is arranged between the filter (80) and the air compressor (20), and the flow meter (90) connects the filter (80) and the air inlet (24).

10. A fuel cell, characterized in that: A fuel cell air system comprising the fuel cell air system according to any one of claims 1 to 9.

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