Fuel cell system

Abstract

Even if hydrogen leaks inside the housing of the fuel cell system, it is possible to suppress the leaked hydrogen from flowing into the power storage unit disposed inside the housing, thereby improving the safety of the fuel cell system. A housing (10) that houses a fuel cell system (1), the fuel cell system including: a hydrogen storage unit (30) that has a hydrogen supply / discharge hole (31) and is capable of storing hydrogen; a fuel cell stack (40) that generates electricity using the supplied hydrogen; a pipe that has one end connected to the supply / discharge hole (31) and the other end connected to the fuel cell stack (40) and is configured to supply the hydrogen stored in the hydrogen storage unit (30) to the fuel cell stack (40); and a power storage unit (50) that stores at least the electricity generated by the fuel cell stack (40). The power storage unit (50) is provided on the lower surface portion of the housing (10), and the supply / discharge hole (31), the fuel cell stack (40), and the pipe connecting them are provided at positions higher than the upper surface portion of the power storage unit (50).

Description

Technical Field

[0001] The present invention relates to a housing for accommodating a fuel cell system, the fuel cell system including: a hydrogen storage unit; a fuel cell stack that generates electricity using hydrogen supplied from the hydrogen storage unit; and a power storage unit that stores electric power generated by the fuel cell stack. Background Art

[0002] In recent years, fuel cell systems with high energy efficiency and environmental friendliness have received attention. A fuel cell system includes: a hydrogen storage unit that stores hydrogen; a fuel cell stack that generates electricity using hydrogen supplied from the hydrogen storage unit; and a power storage unit that stores electric power obtained by the power generation of the fuel cell stack.

[0003] There is a technology of mounting such a fuel cell system on a vehicle so that the electric power of the fuel cell system can be supplied to a drive motor of the vehicle or to an external electronic device, etc. (for example, refer to Patent Document 1 below). In addition, there is also a technology of mounting such a fuel cell system on a trailer towed by a vehicle, etc., so that it can be used as a mobile power source that can move (for example, refer to Patent Documents 2 and 3 below).

[0004] Prior Art Documents

[0005] Patent Documents

[0006] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2002-141078

[0007] Patent Document 2: Japanese Patent Application Laid-open No. 2006-523373

[0008] Patent Document 3: Japanese Unexamined Patent Application Publication No. 2003-317787 Summary of the Invention

[0009] Problems to be Solved by the Invention

[0010] In order to improve the convenience as a mobile power source, in a fuel cell system, it is considered to accommodate the hydrogen storage unit, the fuel cell stack, and the power storage unit in the same housing. However, if the three are accommodated in the same housing, when hydrogen leaks from the hydrogen storage unit, the fuel cell stack, or the pipe connecting the two, the leaked hydrogen may flow into the power storage unit and cause a fire, and there is room for improvement in this regard from the viewpoint of improving the safety of the fuel cell system.

[0011] The present invention provides a housing that can suppress the leaked hydrogen from flowing into the power storage unit disposed in the housing even if hydrogen leaks in the housing of the fuel cell system, and can improve the safety of the fuel cell system.

[0012] Means for Solving the Problems

[0013] The present invention provides a housing that houses a fuel cell system, the fuel cell system including:

[0014] a hydrogen storage section that has hydrogen supply / discharge holes and is capable of storing hydrogen;

[0015] a fuel cell stack that generates electricity using the supplied hydrogen;

[0016] a pipe that has one end connected to the supply / discharge holes and the other end connected to the fuel cell stack, and supplies the hydrogen stored in the hydrogen storage section to the fuel cell stack; and

[0017] a power storage section that stores at least the power generated by the fuel cell stack, wherein

[0018] the power storage section is provided on the lower surface portion of the housing,

[0019] and the supply / discharge holes, the fuel cell stack, and the pipe are provided at positions higher than the upper surface portion of the power storage section.

[0020] Advantages of the Invention

[0021] According to the present invention, it is possible to provide a housing that can suppress the leaked hydrogen from flowing into the power storage section disposed in the housing even if hydrogen leaks in the housing of the fuel cell system, and can improve the safety of the fuel cell system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a perspective view of the fuel cell system and the housing of the present embodiment.

[0023] Figure 2 is a perspective view showing the inside of the fuel cell system and the housing as viewed from the upper surface Figure 1 through.

[0024] Figure 3 is a perspective view showing the inside of the fuel cell system and the housing as viewed from the front surface Figure 1 through.

[0025] Figure 4 is a perspective view showing the inside of the fuel cell system and the housing as viewed from the left side surface Figure 1 through.

[0026] Figure 5 is a perspective view showing the inside of the fuel cell system and the housing as viewed from the right side surface Figure 1 through.

[0027] Figure 6 is a front view of the input / output section.

[0028] Figure 7It is a schematic diagram showing the state of charging an electronic device and a vehicle from a fuel cell system.

[0029] Figure 8 It is a schematic diagram of a moving body connected with a vehicle as a towing part and a trailer as a towed part.

[0030] Figure 9A It is a schematic diagram of another example of a moving body, which is a perspective top view of the moving body.

[0031] Figure 9B It is a schematic diagram of another example of a moving body, which is a side view of the moving body.

[0032] Figure 10A It is an enlarged view of the connecting part in the moving body of FIG. 9.

[0033] Figure 10B It is a rear view of the trailer in the moving body of FIG. 9.

[0034] Figure 10C It is a front view of the trailer in the state where the loading and unloading part is exposed in the moving body of FIG. 9.

[0035] Figure 10D It is a front view of the trailer in the state where a cover member is installed in the moving body of FIG. 9.

[0036] Figure 11 It is a block diagram showing an example of the functional structure of the moving body of the present embodiment.

[0037] Figure 12 It is a flowchart showing an example of the control method of the fuel cell system of the present embodiment.

[0038] Figure 13 It is a timing chart showing a specific power supply example of the fuel cell system of the present embodiment.

[0039] Explanation of reference numerals

[0040] 1 Fuel cell system

[0041] 10 Housing

[0042] 19 Input / output unit

[0043] 21, 22 Air supply device

[0044] 30 Hydrogen storage unit

[0045] 31 Supply and discharge hole

[0046] 40 Fuel cell stack

[0047] 50 Power storage unit

[0048] 60 Control unit Detailed implementation mode

[0049] Hereinafter, an embodiment of the present invention will be described based on the drawings. In addition, in this specification and the like, in order to make the description simple and clear, the front, rear, left, and right directions are described according to the direction observed by the user of the fuel cell system of this embodiment. In the drawings, the front of the housing accommodating the fuel cell system is denoted as Fr, the rear as Rr, the left as L, the right as R, the upper as U, and the lower as D.

[0050] As Figure 1 shown, the fuel cell system 1 of this embodiment is a device capable of generating electricity using hydrogen as a power generation source, and includes a housing 10. The housing 10 forms the outer shape of the fuel cell system 1 and houses various components and units (for example, the fuel cell stack 40 described later) included in the fuel cell system 1.

[0051] The housing 10 includes: a box-shaped main body 11 made of resin or the like, having openings (not shown) provided on the left and right side faces; a cover portion 12 covering the openings on the left and right side faces of the main body 11; and casters 13 provided on the lower surface portion of the main body 11. In addition, ventilation holes 14 and 16 that allow the inside and outside of the housing 10 to communicate with each other are formed in a substantially rectangular shape extending in the left-right direction on the front surface portion (front side side face) and the upper surface portion of the main body 11.

[0052] For example, one of the ventilation holes 14 and 16 (for example, the ventilation hole 14) functions to suck air outside the housing 10 into the housing 10, and the other ventilation hole (for example, the ventilation hole 16) functions to discharge the air inside the housing 10 to the outside of the housing 10. Through the ventilation holes 14 and 16, the airtightness between the inside and outside of the housing 10 can be ensured, the retention of high-temperature air inside the housing 10 can be suppressed, and the cooling of the fuel cell system 1 can be achieved. In addition, by ensuring the airtightness between the inside and outside of the housing 10 using the ventilation holes 14 and 16, even if hydrogen is generated inside the housing 10 for some reason, the generated hydrogen can be quickly discharged to the outside of the housing 10.

[0053] The ventilation hole 14 is provided on the front surface portion of the main body 11 at a position corresponding to the edge 18 along the edge 18 connecting the front surface portion and the upper surface portion of the main body 11 (i.e., the housing 10). In addition, the ventilation hole 16 is provided on the upper surface portion of the main body 11 at a position corresponding to the edge 18 along the above-mentioned edge 18. In other words, the edge 18 is sandwiched between the ventilation hole 14 and the ventilation hole 16. Thus, compared with the case where the ventilation hole 14 and the ventilation hole 16 are provided directly adjacent to each other, the strength of the main body 11 (i.e., the housing 10) can be maintained, and the ventilation between the inside and the outside of the housing 10 can be ensured.

[0054] In addition, in the ventilation holes 14 and 16, a plurality of louver plates 15 and 17 parallel to each other are provided along their longitudinal directions (i.e., the left-right direction). By means of the louver plates 15 and 17, for example, it can be configured such that air or the like discharged from the ventilation hole on the exhaust side (e.g., the ventilation hole 16) in the ventilation holes 14 and 16 is difficult to bypass into the ventilation hole on the intake side (e.g., the ventilation hole 14). By configuring in this way, it is possible to suppress the high-temperature air discharged to the outside of the housing 10 from being taken into the housing 10 again. In addition, by configuring in this way, it is also possible to suppress the hydrogen discharged to the outside of the housing 10 from being taken into the housing 10 again.

[0055] In addition, on the front surface portion of the main body 11, an input / output portion 19 for outputting the power of the fuel cell system 1 to the outside or inputting the power from the outside to the fuel cell system 1 is provided below the ventilation hole 14. By providing the input / output portion 19 on the front surface portion of the main body 11 in the same manner as the ventilation hole 14, it is possible to achieve both ensuring the accessibility of the user to the input / output portion 19 and ensuring the ventilation of the ventilation hole 14.

[0056] That is, from the viewpoint of ensuring the ventilation of the ventilation hole 14, the fuel cell system 1 can be used in a state where a predetermined space is ensured on the front surface side of the housing 10 (the main body 11). Therefore, by providing the input / output portion 19 on the front surface portion of the main body 11 in the same manner as the ventilation hole 14, when using the fuel cell system 1, through the above-mentioned space, it is convenient for the user to access the input / output portion 19 via the above-mentioned space, and the connection between the fuel cell system 1 and external devices or the like can be smoothly carried out. In addition, an example of the input / output portion 19 will be described later using Figure 6 Describe an example of the input / output portion 19.

[0057] As Figures 2 to 5 shown, the fuel cell system 1 is configured to accommodate a hydrogen storage portion 30 having a hydrogen supply / discharge hole 31, a fuel cell stack 40 that generates electricity using the hydrogen supplied from the hydrogen storage portion 30, a pipe (not shown) connecting the hydrogen storage portion 30 and the fuel cell stack 40, and a power storage portion 50 that stores the power obtained by the power generation of the fuel cell stack 40 or the supply from the outside in the housing 10.

[0058] The hydrogen storage unit 30 is a tank or the like that can store hydrogen (e.g., liquid hydrogen) supplied from the outside through the supply / discharge hole 31. The supply / discharge hole 31 is provided to protrude leftward from the center of the left side surface of the hydrogen storage unit 30 and faces the lid portion 12 that covers the opening of the left side surface of the main body 11 in the left-right direction. Therefore, the user can access the supply / discharge hole 31 by removing the lid portion 12 that covers the opening of the left side surface of the main body 11 from the main body 11, and can easily charge hydrogen into the hydrogen storage unit 30. The hydrogen stored in the hydrogen storage unit 30 is supplied to the fuel cell stack 40 through the supply / discharge hole 31 and the above-described pipe having one end connected to the supply / discharge hole 31 and the other end connected to the fuel cell stack 40.

[0059] The hydrogen storage unit 30 is disposed at a position overlapping the ventilation holes 16 when the housing 10 is viewed from above, and is disposed at a position overlapping the ventilation hole 14 when the housing 10 is viewed from the front (i.e., viewed from the side on the front side). By disposing the hydrogen storage unit 30 in this way, for example, when charging hydrogen into the hydrogen storage unit 30, the hydrogen released to the periphery of the hydrogen storage unit 30 (hereinafter, also referred to as released hydrogen) can be quickly discharged from the ventilation holes 14 and 16 to the outside of the housing 10. Therefore, it is possible to prevent the released hydrogen from staying in the housing 10 and flowing into the power storage unit 50 side, and the safety of the fuel cell system 1 can be improved.

[0060] In addition, by adopting a structure that quickly discharges the released hydrogen to the outside of the housing 10, when a hydrogen detector (not shown) is provided in the housing 10, the hydrogen detector can distinguish and detect the hydrogen leaked from the hydrogen storage unit 30, the fuel cell stack 40, or the pipe connecting the two (hereinafter, also referred to as leaked hydrogen) from the released hydrogen. That is, it is considered that the released hydrogen is not detected by the hydrogen detector and is quickly discharged to the outside of the housing 10 through the ventilation hole 16 or the like. In contrast, since the leaked hydrogen generated from the fuel cell stack 40 or the pipe connecting the hydrogen storage unit 30 and the fuel cell stack 40 stays in the housing 10 at least temporarily, it is considered that the leaked hydrogen is detected by the hydrogen detector. Therefore, by adopting a structure that quickly discharges the released hydrogen to the outside of the housing 10, when a hydrogen detector is provided in the housing 10, the leaked hydrogen can be distinguished and detected from the released hydrogen by the hydrogen detector (in other words, only the leaked hydrogen is detected).

[0061] The fuel cell stack 40 generates electricity by causing a chemical reaction between the hydrogen supplied from the hydrogen storage unit 30 and oxygen in the air. The electricity generated by the fuel cell stack 40 is output from an output terminal (not shown) provided in the fuel cell stack 40 and supplied to the power storage unit 50 via wiring (not shown) or the like. In addition, the electricity generated by the fuel cell stack 40 may also be output to the outside of the fuel cell system 1 via the input / output unit 19.

[0062] The fuel cell stack 40 is arranged behind the hydrogen storage unit 30 in the housing 10. Furthermore, the connection portion of the fuel cell stack 40 to the aforementioned piping is provided on one side (the left side in this embodiment) when viewing the housing 10 from above. Thus, if schematically shown, the piping connecting the hydrogen storage unit 30 (supply and discharge holes 31) and the fuel cell stack 40, i.e., the hydrogen passage from the hydrogen storage unit 30 to the fuel cell stack 40, is shown as follows: Figure 2 As shown by the arrow indicated by the symbol X1 in FIG. 1 , it indicates a direction from the front to the rear at a position closer to the left in the housing 10 .

[0063] In addition, the output terminal of the fuel cell stack 40 is provided on the other side (the right side in this embodiment) when looking down at the housing 10. Therefore, if shown schematically, the conversion path of the fuel cell stack 40 from hydrogen to electricity is as follows: Figure 2 As shown by the arrow indicated by the symbol X2 in FIG, it is indicated as moving from the left to the right at a rear position in the casing 10. Here, the conversion path for converting hydrogen into electricity in the fuel cell stack 40 is, for example, a line segment connecting the connection portion connected to the above-mentioned piping in the fuel cell stack 40 and the above-mentioned output terminal provided in the fuel cell stack 40.

[0064] The power storage unit 50 stores the power supplied from the fuel cell stack 40. The power storage unit 50 is implemented by any type of secondary battery, such as a lithium-ion battery, a nickel-metal hydride battery, or a lead-acid battery. The power stored in the power storage unit 50 can be output to the outside of the fuel cell system 1 via the input / output unit 19.

[0065] like Figures 3 to 5 As shown, the power storage unit 50 is disposed on the lower surface (bottom) of the casing 10. Furthermore, within the casing 10, the upper surface of the power storage unit 50 is positioned lower than the hydrogen storage unit 30 (supply and discharge holes 31), the fuel cell stack 40, and the piping connecting them. In other words, within the casing 10, the hydrogen storage unit 30 (supply and discharge holes 31), the fuel cell stack 40, and the piping connecting them are positioned higher than the upper surface of the power storage unit 50.

[0066] Thus, by arranging components that could potentially leak hydrogen, such as the supply and exhaust holes 31, the fuel cell stack 40, and the piping connecting the two, at a position higher than the upper surface of the power storage unit 50, even if hydrogen leaks from these components, it is possible to suppress the leaked hydrogen from flowing toward the power storage unit 50. In other words, hydrogen, which is lighter than air, will migrate upward (i.e., in the direction opposite to the power storage unit 50) even if it leaks from these components. Therefore, by arranging components that could potentially leak hydrogen higher than the power storage unit 50, even if hydrogen leaks from these components, it is possible to suppress the leaked hydrogen from flowing toward the power storage unit 50, thereby improving the safety of the fuel cell system 1.

[0067] In addition, a control unit 60 is also provided in the housing 10. The control unit 60 includes, for example, a power conversion unit (not shown) composed of a DC / DC converter, an inverter, etc., and a control device (not shown) composed of a microcomputer that controls the power conversion unit. The control unit 60 is electrically connected to the power storage unit 50 and the input / output unit 19, for example, converts the power output from the power storage unit 50 into a specified power (for example, 100 [V] and 50 [Hz] alternating current), and supplies the converted power to the input / output unit 19. Thus, the fuel cell system 1 can output power convenient for the user to use from the input / output unit 19.

[0068] In addition, the control unit 60 can also convert multiple types of power, so that multiple types of power such as high-voltage power and low-voltage power can be output from the input / output unit 19. Thus, for example, low-voltage power can be output from the later-described power supply holes 81 and 82 in the input / output unit 19, and high-voltage power can be output from the later-described power supply hole 83 in the input / output unit 19.

[0069] In addition, the control unit 60 is arranged in the housing 10 to the right of the hydrogen storage unit 30 and in front of the fuel cell stack 40. In addition, the input / output unit 19 is also arranged on the right side in the housing 10 corresponding to the control unit 60. And the terminals, wirings, etc. for electrically connecting the control unit 60, the power storage unit 50, and the input / output unit 19 are also arranged on the right side in the housing 10 corresponding to the control unit 60. Therefore, if schematically shown, the power passing path in the housing 10, as shown by the arrow indicated by the symbol X3 in Figure 2 is shown as going from the rear to the front at a position on the right side in the housing 10.

[0070] That is, the respective components of the fuel cell system 1 are arranged in the housing 10 in such a way that when looking down at the housing 10, the hydrogen passing path X1, the conversion path X2 from hydrogen to power, and the power passing path X3 form a substantially U shape. Thus, the components that process hydrogen (i.e., the components where hydrogen leakage is possible) and the components that process electricity can be separately arranged in the housing 10, and even if hydrogen leaks from the components that process hydrogen, it is possible to suppress the inflow of the hydrogen to the side of the components that process electricity.

[0071] That is, in the present embodiment, the components that process hydrogen such as the supply / discharge hole 31, the pipe connecting the hydrogen storage unit 30 and the fuel cell stack 40, and the connecting portion in the fuel cell stack 40 connected to the pipe are provided in the hydrogen utilization region A1 that becomes the left side when looking down at the housing 10 (refer to Figure 2). On the other hand, constituent elements for processing electricity such as the input / output unit 19, the control unit 60, the terminals and wirings for electrically connecting the control unit 60, the power storage unit 50, and the input / output unit 19 are provided in the electricity utilization area A2 that becomes the right side when the housing 10 is viewed from above (refer to Figure 2 ). In this way, by dividing the areas where the constituent elements for processing hydrogen and the constituent elements for processing electricity are respectively arranged, the constituent elements for processing hydrogen and the constituent elements for processing electricity can be arranged separately within the housing 10. Even if hydrogen leaks from the constituent elements for processing hydrogen, it is possible to suppress the inflow of this hydrogen into the constituent elements for processing electricity, thereby improving the safety of the fuel cell system 1.

[0072] In addition, within the housing 10, air supply devices 21 and 22 are provided at positions vertically opposed to the ventilation holes 16 (ventilation holes provided in the upper surface portion of the main body 11). The air supply devices 21 and 22 are, for example, electric fans having impellers that are rotationally driven according to the supply of electricity. And, by the rotation of the impellers of the air supply devices 21 and 22, the air within the housing 10 is conveyed outside the housing 10 via the ventilation holes 16. Through the air supply devices 21 and 22, the housing 10 can take in air from the ventilation holes 14 into the housing 10, promote the discharge of the air within the housing 10 from the ventilation holes 16, and can improve the ventilation between the inside and outside of the housing 10.

[0073] In addition, due to the air supply devices 21 and 22, the ventilation between the inside and outside of the housing 10 can be improved. Therefore, the released hydrogen when hydrogen is filled into the hydrogen storage unit 30, the hydrogen leaking from the hydrogen storage unit 30, the above-mentioned pipes, etc. can also be quickly discharged outside the housing 10, and it is possible to suppress the retention of this hydrogen within the housing 10 and its inflow to the power storage unit 50 side. Thereby, the safety of the fuel cell system 1 can be improved. That is, the hydrogen leaked into the housing 10 is lighter than air in specific gravity, so it rises within the housing 10. Therefore, by arranging the air supply devices 21 and 22 in a manner opposed to the ventilation holes 16 in the upper surface portion of the main body 11, the hydrogen rising within the housing 10 can be quickly discharged outside the housing 10 from the ventilation holes 16.

[0074] In addition, as Figure 3 shown, the air supply device 21 is arranged at a position vertically opposed to the supply / discharge hole 31. In other words, when the housing 10 is viewed from above, the air supply device 21 is arranged at a position overlapping the supply / discharge hole 31. Thereby, the air supply device 21 can quickly discharge the hydrogen leaking from the supply / discharge hole 31 and rising upward outside the housing 10, and can improve the safety of the fuel cell system 1.

[0075] In addition, as Figure 6As shown, the input / output unit 19 includes a plurality of power supply holes such as power supply holes 81, 82, and 83. In the input / output unit 19, the power supply holes 81, 82 and the power supply holes having the same shape as them are, for example, power supply holes for input / output of low-voltage power of about 100 [V] (hereinafter, also referred to as low-voltage power supply holes). The plurality of low-voltage power supply holes provided in the input / output unit 19 are arranged so as to be displaced from each other in the vertical direction and the horizontal direction. Thus, for example, even if a large-sized adapter such as an AC adapter is inserted into one low-voltage power supply hole, interference with other low-voltage power supply holes can be suppressed. Therefore, a plurality of devices can be connected to the fuel cell system 1 at the same time, improving the convenience of the fuel cell system 1. In addition, low-voltage power supply holes such as power supply holes 81 and 82 are used, for example, when connecting the fuel cell system 1 to an electronic device 150 described later.

[0076] In addition, in the input / output unit 19, the power supply hole 83 is, for example, a power supply hole for input / output of high-voltage power such as 200 [V] (hereinafter, also referred to as a high-voltage power supply hole). In addition, the power supply hole 83 (that is, the high-voltage power supply hole) is used, for example, when connecting the fuel cell system 1 to a vehicle 100 described later.

[0077] (Usage examples of fuel cell systems)

[0078] Next, usage examples of the fuel cell system 1 will be described. The fuel cell system 1 can supply power to external devices connected to the input / output unit 19. As Figure 7 shown, the fuel cell system 1 can be connected to a vehicle 100, for example. Here, the vehicle 100 is, for example, a hybrid electric vehicle or an electric vehicle. That is, the vehicle 100 includes a drive device that is driven according to power supply (for example, refer to the reference numeral 110 in Figure 11 the attached drawing) and a battery that can supply power to the drive device (for example, refer to the reference numeral 120 in Figure 11 the attached drawing). Moreover, the vehicle 100 travels by being driven by the drive device.

[0079] When the fuel cell system 1 is connected to the vehicle 100, it supplies power for driving the drive device of the vehicle 100 and power for charging the storage battery of the vehicle 100. In addition, the fuel cell system 1 can be connected to the user's electronic device 150. Here, the electronic device 150 is an electronic device equipped with a battery such as a smartphone, for example. When the fuel cell system 1 is connected to the electronic device 150, it supplies power for charging the storage battery of the electronic device 150. According to such a fuel cell system 1, for example, it is useful to ensure a power source even in an emergency such as a disaster.

[0080] In addition, as Figure 8 shown, the fuel cell system 1 can also be mounted on the moving body 300 for use. Here, the moving body 300 is composed of a vehicle 100 and a trailer 200 towed by the vehicle 100. The vehicle 100 is an example of the towing part in the present invention, and the trailer 200 is an example of the non-towing part in the present invention.

[0081] The fuel cell system 1 (housing 10) mounted on the trailer 200 is electrically connected to the vehicle 100, and supplies power for driving the driving device of the vehicle 100 and power for charging the battery of the vehicle 100. Thus, the fuel cell system 1 can be used as a range extender for the vehicle 100.

[0082] In addition, as Figure 8 shown, the fuel cell system 1 (housing 10) is arranged in a state of being mounted on the trailer 200 such that the side surface portion (i.e., the front surface portion) provided with the input / output portion 19 faces the vehicle 100 side. Thus, not only can the mechanical connection between the vehicle 100 and the trailer 200 (the connection for towing the trailer 200 by the vehicle 100) be shortened, but also the wiring distance between the vehicle 100 and the fuel cell system 1 can be shortened, and it is easy to electrically connect the two. Furthermore, by doing so, the running wind generated due to the movement (travel) of the moving body 300 can be effectively utilized to efficiently cool the fuel cell system 1.

[0083] In addition, the fuel cell system 1 (housing 10) is arranged in a state of being mounted on the trailer 200 at a position closer to the vehicle 100 side than the rear end portion of the wheels provided on the trailer 200 (refer to the imaginary line L1). Thus, since the housing 10 is arranged at a position closer to the front side than the rear end portion of the wheels of the trailer 200, when a vehicle running behind the vehicle 100 rear-ends the trailer 200, the housing 10 can be protected by the wheels (e.g., tires) of the trailer 200, and damage to the housing 10 can be suppressed.

[0084] In addition, the center of gravity G of the fuel cell system 1 (housing 10) is arranged at a position closer to the vehicle 100 side than the axle provided on the trailer 200 (refer to the imaginary line L2). Thus, the center of gravity G is arranged closer to the center of the moving body 300 in the front-rear direction, and thus the stability during the movement of the moving body 300 can be improved.

[0085] In addition, Figure 9A 、 Figure 9B and Figures 10A to 10D show the moving body 300 of other examples. Specifically, Figure 9A is a perspective top view of the moving body, Figure 9B is a side view of the moving body. In addition, Figure 10A is an enlarged view of the connecting portion 310, Figure 10Bis a rear view of the trailer 200, Figure 10C is a front view of the trailer 200 with the loading and unloading unit 210 exposed, Figure 10D is a front view of the trailer 200 with the lid member 220 installed.

[0086] In Figure 9A , Figure 9B and Figures 10A to 10D In the example shown, the trailer 200 has, in addition to a space (hereinafter also referred to as a mounting space) for mounting the fuel cell system 1 (the housing 10), a staying space S where a person can stay. In the trailer 200, the mounting space and the staying space S are separated by a panel or the like to form independent spaces. That is, the housing 10 (the fuel cell system 1) is arranged outside the staying space S in the trailer 200. Thereby, an improvement in the habitability of the staying space S can be achieved.

[0087] In addition, in Figure 9A , Figure 9B and Figures 10A to 10D In the example shown, a connecting portion 310 (see Figure 10A ) and a loading and unloading unit 210 (see Figure 10C ) are provided on the front surface portion of the trailer 200. Here, the front surface portion of the trailer 200 is a side surface portion of the trailer 200 that faces the vehicle 100 when the trailer 200 is towed by the vehicle 100.

[0088] The trailer 200 is mechanically connected to the vehicle 100 via the connecting portion 310 and is thus towed by the vehicle 100. In addition, a connection cable 320 (see Figure 11 ) that electrically connects the fuel cell system 1 mounted on the trailer 200 to the vehicle 100 is provided to extend from the trailer 200 toward the vehicle 100 along the connecting portion 310. The connection cable 320 is configured to include, in addition to a power supply line for supplying power of the fuel cell system 1 to the vehicle 100, a signal line or the like for communication between the fuel cell system 1 (for example, a control unit 90 described later) and the vehicle 100.

[0089] The loading and unloading unit 210 defines and forms a mounting space and is configured to be able to mount the housing 10 from the outside. For example, the loading and unloading unit 210 is realized by a panel or the like having a predetermined shape and defines and forms a mounting space that is recessed in a substantially rectangular parallelepiped shape from the front surface portion of the trailer 200 toward the rear of the trailer 200. Moreover, the housing 10 can be inserted into the mounting space defined and formed by the loading and unloading unit 210 from the front (i.e., the outside) of the trailer 200. By inserting the housing 10 into the mounting space, the housing 10 can be mounted on the trailer 200. Therefore, the user can easily mount the housing 10 on the trailer 200 (i.e., the moving body 300).

[0090] In addition, the loading and unloading unit 210 (mounting space) can be covered by the cover member 220 (refer to Figure 10D ) from the front of the trailer 200 (i.e., the vehicle 100 side) in a state where the housing 10 is installed. Thereby, the housing 10 can be reliably installed on the loading and unloading unit 210, and the housing 10 can be protected from foreign matters such as mud splashes and flying stones from the front generated by the movement of the moving body 300.

[0091] In addition, in Figure 9A , Figure 9B and Figures 10A to 10D In the example shown, a first power supply unit 230 capable of supplying power to the outside is provided on the side surface portion (for example, the left side surface portion) of the trailer 200. Moreover, the aforementioned input / output unit 19 is configured to be electrically connected to the first power supply unit 230 in a state where the housing 10 (fuel cell system 1) is mounted on the trailer 200, and can supply the power stored in the power storage unit 50 or the power generated by the fuel cell stack 40 to the outside via the first power supply unit 230. Thereby, even in a state where the housing 10 (fuel cell system 1) is mounted on the trailer 200, the power of the fuel cell system 1 can be easily supplied to the outside via the first power supply unit 230, and the convenience of the fuel cell system 1 can be improved.

[0092] In addition, a second power supply unit (not shown) for supplying power to the staying space S is also provided inside the trailer 200. Moreover, the aforementioned input / output unit 19 is configured to be electrically connected to the second power supply unit in a state where the housing 10 (fuel cell system 1) is mounted on the trailer 200, and can supply the power stored in the power storage unit 50 or the power generated by the fuel cell stack 40 to the inside of the staying space S via the second power supply unit. Thereby, even in a state where the housing 10 (fuel cell system 1) is mounted on the trailer 200, the power of the fuel cell system 1 can be supplied to the equipment (such as the electronic device 150) inside the staying space S via the second power supply unit, and the convenience of the fuel cell system 1 can be improved.

[0093] In addition, the input / output unit 19 may be electrically connected to at least one of the vehicle 100 and the first power supply unit 230 and the second power supply unit in a state where the housing 10 is mounted on the trailer 200. Moreover, the input / output unit 19 may be configured to be able to supply the power stored in the power storage unit 50 or the power generated by the fuel cell stack 40 to at least one of the connected vehicle 100 and the first power supply unit 230 and the second power supply unit. Thereby, the power of the fuel cell system 1 can be used simultaneously in the equipment connected to the vehicle 100 or the first power supply unit 230 and the equipment connected to the second power supply unit, and the convenience of the fuel cell system 1 can be further improved.

[0094] In addition, a storage unit (not shown) may also be provided inside the housing 10. The storage unit stores the generated water produced by the power generation of the fuel cell stack 40 and can supply the stored generated water to the trailer 200. Thus, the water generated as a by-product during the power generation of the fuel cell stack 40 can be utilized in the trailer 200. Additionally, the storage unit may also be connected to a pipeline (not shown) connected to the staying space S, and the stored generated water can be supplied to the staying space S via the pipeline. Thus, water can be supplied to the staying space S where people stay, and the convenience of the users staying in the staying space S can be improved.

[0095] In addition, the above-mentioned storage unit may also condense the water vapor generated by the power generation of the fuel cell stack 40 into water droplets, recover and purify the water droplets, and supply the purified water as the generated water to the trailer 200 (staying space S). Thus, clean and user-friendly water can be supplied, and the convenience of the users staying in the staying space S can be improved.

[0096] (Functional Structure of the Moving Body)

[0097] Next, an example of the functional structure of the moving body 300 will be described with reference to Figure 11 As shown in Figure 11 the fuel cell system 1 of the trailer 200 mounted on the moving body 300 includes, in addition to the aforementioned hydrogen storage unit 30, fuel cell stack 40, power storage unit 50, and input / output unit 19, a control unit 90.

[0098] The control unit 90 is implemented, for example, by an electronic control unit (ECU: Electronic Control Unit) and is provided in the aforementioned control unit 60. The electronic control unit includes a processor that performs various operations, a storage device that stores various information, an input / output device that controls the input / output of data inside and outside the control unit 90, and the like. As shown by the dashed arrow in Figure 11 the control unit 90 can not only control the power generation of the fuel cell stack 40 and the charge and discharge of the power storage unit 50, but also communicate with the vehicle 100 via the connection cable 320.

[0099] Here, the vehicle 100 is a hybrid electric vehicle or an electric vehicle, etc., and includes a drive device 110 implemented by a drive motor or the like that is driven according to the power supply, and a storage battery 120 that can supply power to the drive device 110. Moreover, the vehicle 100 can travel by being driven by the drive device 110. In addition, the vehicle 100 derives the remaining amount (e.g., SOC: state of charge) of the storage battery 120 based on the output of the storage battery 120 detected by a storage battery sensor (not shown) and transmits the remaining amount information indicating the derived remaining amount of the storage battery 120 to the control unit 90 via the connection cable 320.

[0100] Based on the remaining amount information obtained from the vehicle 100, the control unit 90 controls the power supply from the fuel cell system 1 to the vehicle 100. Thereby, even if the remaining amount of the storage battery 120 becomes small, the power required in the vehicle 100 can be ensured by the power of the fuel cell system 1. Therefore, the convenience of the vehicle 100 can be improved.

[0101] For example, when the control unit 90 detects that the remaining amount of the storage battery 120 is below the threshold value based on the remaining amount information obtained from the vehicle 100, it starts the power supply from the fuel cell system 1 to the storage battery 120. Thereby, when the power of the storage battery 120 decreases as the vehicle 100 travels, the power of the fuel cell system 1 can be supplied to the storage battery 120 to charge the storage battery 120. Therefore, the travelable distance of the vehicle 100 based on the power of the storage battery 120 can be extended.

[0102] In addition, the control unit 90 may also start the power supply from the fuel cell system 1 to the drive device 110 when it detects that the remaining amount of the storage battery 120 is below the threshold value based on the remaining amount information obtained from the vehicle 100. That is, the control unit 90 may directly supply power from the fuel cell system 1 to the drive device 110. Thereby, even if the remaining amount of the storage battery 120 becomes small, the power required for the drive device 110 (for example, the power for driving the vehicle 100 by the drive device 110) can be ensured by the power of the fuel cell system 1.

[0103] When supplying power from the fuel cell system 1 to the vehicle 100, the control unit 90 first supplies the power of the power storage unit 50 to the vehicle 100. For example, the power of the power storage unit 50 supplied to the vehicle 100 is supplied to the drive device 110 for driving. That is, the control unit 90 may also supply the power of the power storage unit 50 to the drive device 110 when starting to supply power to the vehicle 100. Thereby, the power required for the drive device 110 can be ensured by the power of the power storage unit 50. In addition, on the basis of supplying power to the drive device 110, when there is remaining power in the power that the power storage unit 50 can output, the control unit 90 may also supply the remaining power to the storage battery 120 to charge the storage battery 120. Thereby, charging the storage battery 120 with the power of the power storage unit 50 can extend the travelable distance of the vehicle 100 based on the power of the storage battery 120. In addition, the power of the power storage unit 50 is supplied to the vehicle 100 via the input / output unit 19 and the connection cable 320.

[0104] After that, when the remaining amount of the power storage unit 50 is below a specified threshold value, the control unit 90 causes the fuel cell stack 40 to start generating power. Thereby, even after the remaining amount of the power storage unit 50 becomes small, the power supply to the vehicle 100 can be continued by the power generated by the fuel cell stack 40.

[0105] In addition, the control unit 90 supplies the power generated by the fuel cell stack 40 in accordance with a specified priority order. Specifically, when it is necessary to supply the power generated by the fuel cell stack 40 to the drive device 110 to maintain the driving of the vehicle 100, the control unit 90 first supplies power to the drive device 110 with the highest priority. Thus, the power required by the drive device 110 can be ensured by the power generated by the fuel cell stack 40.

[0106] Moreover, on the basis of supplying power to the drive device 110, only when there is surplus power, the control unit 90 supplies the power generated by the fuel cell stack 40 to the storage battery 120 and the power storage unit 50. At this time, the control unit 90 gives priority to supplying power to the storage battery 120 compared with the power storage unit 50. That is, the control unit 90 first charges the storage battery 120, and when the remaining amount of the storage battery 120 reaches a specified value (for example, a fully charged state) and the storage battery 120 finishes charging, it charges the power storage unit 50. Thus, the charging of the storage battery 120 can be carried out at an early stage. Therefore, the driving distance of the vehicle 100 based on the power of the storage battery 120, that is, the driving distance of the vehicle 100 alone, can be restored at an early stage, and the convenience of the user of the vehicle 100 can be improved.

[0107] In addition, after the charging of the power storage unit 50 and the storage battery 120 is completed by the power generated by the fuel cell stack 40, that is, after the remaining amounts of the power storage unit 50 and the storage battery 120 reach the specified values, the control unit 90 may also cause the fuel cell stack 40 to continue generating power and supply the generated power to the drive device 110. Thus, the driving of the drive device 110 can be maintained without consuming the power of the storage battery 120. Therefore, both the driving distance of the vehicle 100 based on the power of the storage battery 120, that is, the driving distance of the vehicle 100 alone, can be maintained, and the vehicle 100 can be driven, improving the convenience of the user of the vehicle 100.

[0108] Furthermore, when the hydrogen in the hydrogen storage unit 30 is exhausted due to the continuous power generation of the fuel cell stack 40, the control unit 90 may then supply the power of the power storage unit 50 to the drive device 110. Thus, the driving of the drive device 110 to drive the vehicle 100 can be maintained without consuming the power of the storage battery 120. Therefore, both the driving distance of the vehicle 100 based on the power of the storage battery 120, that is, the driving distance of the vehicle 100 alone, can be maintained, and the vehicle 100 can be driven, improving the convenience of the user of the vehicle 100.

[0109] In addition, for example, when the ignition power supply of the vehicle 100 (the power supply for driving the drive device 110, hereinafter also referred to as the IG power supply) is disconnected, the control unit 90 stops the power generation of the fuel cell stack 40. Thereby, when the driving of the vehicle 100 by the drive device 110 ends, the power generation of the fuel cell stack 40 is stopped, and the consumption of hydrogen can be suppressed.

[0110] Furthermore, after stopping the power generation of the fuel cell stack 40, when the remaining amount of the power storage unit 50 is below the threshold value, the control unit 90 may also cause the fuel cell stack 40 to start generating power again and charge the power storage unit 50. Thereby, after temporarily stopping the power generation of the fuel cell stack 40, as long as the power of the power storage unit 50 decreases, the fuel cell stack 40 can be caused to start generating power again and charge the power storage unit 50.

[0111] (Control method of fuel cell system)

[0112] Next, refer to Figure 12 An example of the control method of the fuel cell system 1 will be described. This control method can be implemented, for example, by a processor of the ECU of the control unit 90 executing a program prestored in a storage device or the like.

[0113] At a specified timing during the movement of the moving body 300 (that is, when the vehicle 100 is running), the control unit 90 acquires the remaining amount information (step S1) indicating the remaining amount of the battery 120 from the vehicle 100. Then, based on the acquired remaining amount information, the control unit 90 determines whether the remaining amount of the battery 120 is below the threshold value (step S2). When the remaining amount of the battery 120 is sufficient (step S2: No), the control unit 90 returns to step S1.

[0114] On the other hand, if the remaining amount of the battery 120 is below the threshold value (step S2: Yes), the control unit 90 starts the power supply from the power storage unit 50 to the vehicle 100 (step S3). Then, the control unit 90 determines whether the remaining amount of the power storage unit 50 is below the threshold value (step S4). When the remaining amount of the power storage unit 50 is sufficient (step S4: No), the control unit 90 continues to supply power from the power storage unit 50 to the vehicle 100.

[0115] On the other hand, when the remaining amount of the power storage unit 50 is below the threshold value (step S4: Yes), the control unit 90 starts the power generation by the fuel cell stack 40 (step S5). Then, the control unit 90 supplies the power generated by the power generation of the fuel cell stack 40 to the drive device 110, the battery 120, and the power storage unit 50 (step S6). At this time, as described above, the control unit 90 preferentially supplies the power generated by the power generation of the fuel cell stack 40 in the order of the drive device 110 > the battery 120 > the power storage unit 50.

[0116] Next, the control unit 90 determines whether the IG power supply of the vehicle 100 is turned off or whether the remaining amount of the power storage unit 50 is equal to or greater than a specified value (for example, the power storage unit 50 is in a fully charged state) (step S7). If a negative determination is made in step S7 (step S7: No), the control unit 90 returns to step S6. In this case, the fuel cell stack 40 continues to generate power. On the other hand, when an affirmative determination is made in step S7 (step S7: Yes), the control unit 90 stops the power generation of the fuel cell stack 40 (step S8) and ends a series of processes.

[0117] In addition, as described above, after stopping the power generation of the fuel cell stack 40, when the remaining amount of the power storage unit 50 is below the threshold value, the control unit 90 may also cause the fuel cell stack 40 to start generating power again, and charge the power storage unit 50 with the power generated by the power generation of the fuel cell stack 40 and the like.

[0118] (Specific power supply example based on the fuel cell system)

[0119] Next, a specific power supply example of the fuel cell system 1 will be described with reference to Figure 13 FIG.

[0120] In the following Figure 13 description, for the parts that are the same as those in the above Figure 11 description, the same reference numerals are used, and the description of their contents is appropriately omitted.

[0121] In Figure 13 the example shown, the fuel cell system 1 is mounted on a trailer 200 towed by the vehicle 100 and is electrically connected to the vehicle 100. That is, the fuel cell system 1 can supply power to the vehicle 100.

[0122] In addition, Figure 13 (a) of Figure 13 shows the remaining amount of hydrogen stored in the hydrogen storage unit 30 of the fuel cell system 1 (illustrated as the hydrogen remaining amount). Figure 13 shows the remaining amount of the storage battery 120 of the vehicle 100 (illustrated as the storage battery remaining amount). Figure 13 shows the presence or absence (on / off) of the power generation of the fuel cell stack 40 of the fuel cell system 1 (illustrated as FC power generation).

[0123] In Figure 13 the period from time t0 to time t1 shown, the vehicle 100 travels by supplying the power of the storage battery 120 to the drive device 110. Therefore, during this period, the remaining amount of the storage battery 120 gradually decreases.

[0124] At Figure 13 the moment t1 shown in the figure, the remaining amount of the storage battery 120 reaches the threshold Th. Here, the threshold Th is a threshold for enabling power supply from the fuel cell system 1 to the vehicle 100. Although not shown in the figure, at the moment t1, the remaining amount (not shown) of the power storage unit 50 of the fuel cell system 1 is also below the threshold.

[0125] In this case, the control unit 90 causes the fuel cell stack 40 to generate power starting from the moment t1, and supplies the power generated by the fuel cell stack 40 to the vehicle 100. The power generated by the fuel cell stack 40 and supplied to the vehicle 100 is used for driving the drive device 110 (i.e., driving of the vehicle 100) and charging the storage battery 120.

[0126] Moreover, at the moment t2 after the moment t1, the remaining amount of the storage battery 120 is above a specified value (for example, the SOC of the storage battery 120 is 100 [%]), and the charging of the storage battery 120 is completed. However, for example, before a specified moment t3, after the moment t2, the control unit 90 continues to cause the fuel cell stack 40 to generate power and supplies the generated power to the vehicle 100. Thereby, before the moment t3, the vehicle 100 can be driven while maintaining the remaining amount of the storage battery 120. Here, the moment t3 is, for example, the moment when the electrical connection between the fuel cell system 1 and the vehicle 100 is released. In addition, the moment t3 can be the moment when the remaining amount of hydrogen stored in the hydrogen storage unit 30 is below the threshold. After such a moment t3, the vehicle 100 is driven by supplying the power of the storage battery 120 to the drive device 110 again.

[0127] In addition, at the moment t4 between the moment t2 and the moment t3, the IG power supply of the vehicle 100 is turned off. In this case, as shown by the thick dashed line in Figure 13 , the control unit 90 causes the fuel cell stack 40 to end power generation at the moment t4. Moreover, in this case, if the IG power supply of the vehicle 100 is turned on later, the power of the storage battery 120 is supplied to the drive device 110, and thus the vehicle 100 is driven.

[0128] As described above, one embodiment of the present invention has been described with reference to the drawings, but the present invention is of course not limited to the above-described embodiment. Obviously, those skilled in the art can conceive of various modification examples or correction examples within the scope described in the technical solution, and these modification examples or correction examples also of course belong to the technical scope of the present invention. In addition, within the scope not departing from the gist of the invention, the respective components in the above-described embodiment can be arbitrarily combined.

[0129] In addition, at least the following matters are described in this specification. And although the corresponding components, etc. in the above-described embodiment are shown in parentheses, the present invention is not limited thereto.

[0130] (1) A housing (housing 10) that houses a fuel cell system (fuel cell system 1), the fuel cell system including: a hydrogen storage unit (hydrogen storage unit 30) that has a hydrogen supply / discharge hole (supply / discharge hole 31) and is capable of storing hydrogen;

[0131] A fuel cell stack (fuel cell stack 40) that generates electricity using the supplied hydrogen;

[0132] A pipe whose one end is connected to the supply / discharge hole and the other end is connected to the fuel cell stack, for supplying the hydrogen stored in the hydrogen storage unit to the fuel cell stack; and

[0133] A power storage unit (power storage unit 50) that stores at least the power generated by the fuel cell stack, wherein

[0134] The power storage unit is provided on the lower surface portion of the housing,

[0135] And the supply / discharge hole, the fuel cell stack, and the pipe are provided at a position higher than the upper surface portion of the power storage unit.

[0136] According to (1), by arranging the components where hydrogen leakage is possible at a position higher than the upper surface portion of the power storage unit, even if hydrogen leaks from these components, it is possible to prevent the leaked hydrogen from entering the power storage unit, thereby improving the safety of the fuel cell system.

[0137] (2) The housing according to (1),

[0138] The housing further includes an air supply device (air supply devices 21 and 22) that is arranged to face the hydrogen storage unit in the vertical direction and blows air upward toward the hydrogen storage unit.

[0139] According to (2), even if hydrogen leaks from the hydrogen storage unit, the air supply device can cause the hydrogen to move upward rapidly, thereby preventing the hydrogen from entering the hydrogen storage unit and improving the safety of the fuel cell system.

[0140] (3) The housing according to (2),

[0141] A plurality of the air supply devices are provided, and when the housing is viewed from above, at least one of the plurality of air supply devices is provided at a position overlapping the supply / discharge hole.

[0142] According to (3), even if hydrogen leaks from the supply / discharge hole, the air supply device can cause the hydrogen to move upward rapidly, thereby preventing the hydrogen from entering the hydrogen storage unit and improving the safety of the fuel cell system.

[0143] (4) The housing according to any one of (1) to (3),

[0144] The housing further includes an input / output unit (input / output unit 19) for inputting and outputting power between the fuel cell system and the outside.

[0145] When the housing is viewed from above, the supply / discharge holes, the pipes, and the connection portions of the fuel cell stack connected to the pipes are provided on one side, and the input / output unit and the power supply unit (control unit 60) that electrically connects at least one of the fuel cell stack or the power storage unit to the input / output unit are provided on the other side.

[0146] According to (4), it is possible to separately arrange the components that process hydrogen (i.e., the components where hydrogen leakage is possible) and the components that process electricity within the housing, and even if hydrogen leaks from the components that process hydrogen, it is possible to suppress the hydrogen from entering the components that process electricity.

[0147] (5) The housing according to any one of (1) to (4),

[0148] The housing further includes an input / output unit for inputting and outputting power between the fuel cell system and the outside.

[0149] When the housing is viewed from above, the hydrogen passage path (passage path X1) from the hydrogen storage unit to the fuel cell stack, the conversion path (conversion path X2) for converting hydrogen to power by the fuel cell stack, and the power passage path (passage path X3) to the input / output unit are formed in a substantially U shape.

[0150] According to (5), it is possible to separately arrange the components that process hydrogen (i.e., the components where hydrogen leakage is possible) and the components that process electricity within the housing, and even if hydrogen leaks from the components that process hydrogen, it is possible to suppress the hydrogen from entering the components that process electricity.

Claims

1. A fuel cell system, the fuel cell system comprising: A housing; A hydrogen storage unit having a supply / discharge hole for hydrogen and capable of storing hydrogen; A fuel cell stack that generates electricity using the supplied hydrogen; A pipe having one end connected to the supply / discharge hole and the other end connected to the fuel cell stack for supplying the hydrogen stored in the hydrogen storage unit to the fuel cell stack; and A power storage unit that stores at least the power obtained by the power generation of the fuel cell stack, wherein the power storage unit is provided on the lower surface portion of the housing, and the supply / discharge hole, the fuel cell stack, and the pipe are provided at positions higher than the upper surface portion of the power storage unit, the housing further includes an input / output unit for inputting / outputting power between the fuel cell system and the outside, when observing the housing from above, the passage path of hydrogen from the hydrogen storage unit to the fuel cell stack, the conversion path of the conversion of hydrogen to power by the fuel cell stack, and the passage path of power to the input / output unit are formed in a U shape.

2. The fuel cell system according to claim 1, wherein the housing further includes a gas supply device that is arranged to face the hydrogen storage unit in the vertical direction and blow air upward toward the hydrogen storage unit.

3. The fuel cell system according to claim 2, wherein a plurality of the gas supply devices are provided, and when observing the housing from above, at least one of the plurality of gas supply devices is provided at a position overlapping the supply / discharge hole.

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