High-pressure tank system and mobile unit

Abstract

To provide a better high-pressure tank system and mobile unit. [Solution] The high-pressure tank system 10 comprises a high-pressure tank group 30 having a plurality of cylindrical high-pressure tanks 42 filled with fuel gas to be supplied to a power source 26, a housing section 32 that houses the high-pressure tank group, and an exhaust passage 40 through which exhaust gas led from the power source flows. The exhaust passage is provided in the housing section such that the heat of the exhaust gas flowing through the exhaust passage can be transferred to the high-pressure tank group.

Description

Technical Field

[0001] The present disclosure relates to a high-pressure tank system and a moving body.

Background Art

[0002] In recent years, in order to enable more people to access affordable, reliable, sustainable, and advanced energy, research and development have been conducted on high-pressure tank systems and moving bodies that contribute to energy efficiency.

[0003] Japanese Patent No. 7067241 discloses a fuel cell vehicle (moving body) equipped with a high-pressure tank system. The high-pressure tank system has a plurality of high-pressure tanks filled with hydrogen gas (fuel gas) supplied to a fuel cell stack (power source). The axial direction of each high-pressure tank extends in a first direction along the horizontal direction. The plurality of high-pressure tanks are arranged in a second direction that is orthogonal to the first direction and along the horizontal direction.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Better high-pressure tank systems and moving bodies are desired.

[0006] The present disclosure aims to solve the above-described problems.

Means for Solving the Problems

[0007] A first aspect of the present disclosure is a high-pressure tank system comprising: a group of high-pressure tanks having a plurality of cylindrical high-pressure tanks filled with fuel gas for supplying to a power source; a housing for housing the group of high-pressure tanks; and an exhaust passage through which exhaust gas led from the power source flows, wherein the exhaust passage is provided in the housing such that the heat of the exhaust gas flowing through the exhaust passage can be transferred to the group of high-pressure tanks.

[0008] A second aspect of the present disclosure comprises a group of high-pressure tanks having a plurality of cylindrical high-pressure tanks filled with fuel gas for supplying to a power source, a housing for housing the group of high-pressure tanks, and an exhaust passage through which exhaust gas led from the power source flows, wherein the exhaust passage is arranged such that the heat of the exhaust gas flowing through the exhaust passage can be transferred to the group of high-pressure tanks, the axis of each of the plurality of high-pressure tanks extends in a first direction along the horizontal direction, the plurality of high-pressure tanks are arranged in a second direction perpendicular to the first direction and along the horizontal direction, and the housing is the The high-pressure tank system has a side wall that covers the high-pressure tank group from two directions, the exhaust passage is provided in the side wall, the high-pressure tank group comprises a first high-pressure tank group and a second high-pressure tank group arranged adjacent to each other in the vertical direction, the side wall has a first portion that covers the first high-pressure tank group from the second direction, and a second portion that is adjacent to the first portion in the vertical direction and covers the second high-pressure tank group from the second direction, the exhaust passage is provided in the second portion, and the first portion protrudes from the second portion on the side opposite to the high-pressure tank group.

[0009] A third aspect of the present disclosure is a high-pressure tank system comprising: a group of cylindrical high-pressure tanks filled with fuel gas for supplying to a power source; a housing for housing the group of high-pressure tanks; and an exhaust passage through which exhaust gas led from the power source flows, wherein the exhaust passage is arranged such that the heat of the exhaust gas flowing through it can be transferred to the group of high-pressure tanks; the axis of each of the group of high-pressure tanks extends in a first direction along the horizontal direction; the group of high-pressure tanks is arranged in a second direction perpendicular to the first direction and along the horizontal direction; the exhaust passage has a lower exhaust passage located below the group of high-pressure tanks; and a lower insulating member is provided between the group of high-pressure tanks and the lower exhaust passage.

[0010] A fourth aspect of the present disclosure is a high-pressure tank system comprising: a group of cylindrical high-pressure tanks filled with fuel gas for supplying to a power source; a housing for housing the group of high-pressure tanks; and an exhaust passage through which exhaust gas led from the power source flows, wherein the exhaust passage is arranged such that the heat of the exhaust gas flowing through it can be transferred to the group of high-pressure tanks; the axis of each of the group of high-pressure tanks extends in a first direction along the horizontal direction; the group of high-pressure tanks is arranged in a second direction perpendicular to the first direction and along the horizontal direction; the exhaust passage has an upper exhaust passage positioned above the group of high-pressure tanks; and an upper insulating member is provided between the group of high-pressure tanks and the upper exhaust passage.

[0011] A fifth aspect of this disclosure is a mobile body comprising a high-pressure tank system according to any one of the first to fourth aspects, and the power source. [Effects of the Invention]

[0012] This disclosure may provide better high-pressure tank systems and mobile units. [Brief explanation of the drawing]

[0013] [Figure 1] Figure 1 is a schematic diagram of a mobile unit equipped with a high-pressure tank system. [Figure 2] Figure 2 is a schematic cross-sectional view along the line II-II in Figure 1. [Figure 3] Figure 3 is a schematic diagram of the high-pressure tank system according to the first modified example. [Figure 4] Figure 4 is a schematic cross-sectional view of a high-pressure tank system according to the second modified example. [Figure 5] Figure 5 is a schematic cross-sectional view of a high-pressure tank system according to the third modified example. [Figure 6] Figure 6 is a schematic diagram of the high-pressure tank system according to the fourth modified example. [Figure 7] Figure 7 is a schematic cross-sectional view along the line VII-VII in Figure 6. [Figure 8] Figure 8 is a schematic cross-sectional view of the high-pressure tank system according to the fifth modified example. [Modes for carrying out the invention]

[0014] When fuel gas is supplied from a high-pressure tank to a power source, the fuel gas undergoes adiabatic expansion, causing its temperature to drop. Supplying low-temperature fuel gas to the power source can affect the durability of seals in auxiliary components. Furthermore, the aforementioned Japanese Patent No. 7067241 does not describe the exhaust passage through which the exhaust gas from the fuel cell stack, which is the power source, is directed. This disclosure may provide a high-pressure tank system and mobile unit that can suppress the supply of low-temperature fuel gas to the power source.

[0015] Figure 1 is a schematic diagram of a mobile body 12 equipped with a high-pressure tank system 10. As shown in Figure 1, in this embodiment, the mobile body 12 is a vehicle 14, such as a fuel cell vehicle. The mobile body 12 is a mobility device and is not limited to a vehicle 14. The mobile body 12 may be an aircraft such as an electric vertical take-off and landing aircraft (eVTOL), a drone, etc. Furthermore, the high-pressure tank system 10 is not limited to being mounted on the mobile body 12. The high-pressure tank system 10 may also be applied to a stationary fuel cell system.

[0016] In the present embodiment, in the vehicle 14 shown in FIG. 1, the "Fr direction" may be referred to as "front", the "Rr direction" as "rear", the "L direction" as "left", and the "R direction" as "right".

[0017] The vehicle 14 includes a vehicle body 16, a pair of front wheels 18, a pair of front doors 20, a pair of rear doors 22, a pair of rear wheels 24, a power source 26, and a high-pressure tank system 10. The vehicle body 16 has a floor panel 28 (see FIG. 2).

[0018] The power source 26 is disposed in a front box (motor room) provided in front (Fr direction) of the floor panel 28. The power source 26 is located between the pair of front wheels 18. The power source 26 is a power device (power unit) that generates power such as electricity. The power source 26 has a fuel cell that generates electricity by an electrochemical reaction between a fuel gas and an oxidant gas. The power source 26 may have, for example, a hydrogen engine that obtains power by a combustion reaction of hydrogen gas. The power source 26 is located between the front end of the vehicle 14 and the high-pressure tank group 30.

[0019] The high-pressure tank system 10 includes a high-pressure tank group 30, a housing portion 32, an opening / closing valve 34, a pressure reducing valve 36, a supply pipe 38, and an exhaust passage 40. The high-pressure tank group 30 includes a plurality of high-pressure tanks 42. Each high-pressure tank 42 is filled with a fuel gas supplied to the power source 26. Specifically, each high-pressure tank 42 can be filled with a fuel gas at a pressure of about 70 MPa, for example. Examples of the fuel gas filled in the high-pressure tank 42 include hydrogen gas. The fuel gas is not limited to hydrogen gas.

[0020] The high-pressure tank 42 is formed in a cylindrical shape. The high-pressure tank 42 is formed, for example, by wrapping a strip of fiber impregnated with resin around the outer surface of a cylindrical liner (not shown). The axis of each of the multiple high-pressure tanks 42 extends in a first direction (the longitudinal direction of the vehicle 14) along the horizontal direction. The multiple high-pressure tanks 42 are arranged in a second direction (the width direction of the vehicle 14) that is perpendicular to the first direction and also along the horizontal direction. The high-pressure tank group 30 is located below the floor panel 28 (see Figure 2).

[0021] Figure 2 is a schematic cross-sectional view along line II-II in Figure 1. As shown in Figures 1 and 2, the housing 32 houses the high-pressure tank group 30. The housing 32 protects the high-pressure tank group 30 in the event of a collision with the vehicle 14. The housing 32 seals the high-pressure tank group 30. However, the housing 32 does not necessarily have to seal the high-pressure tank group 30. That is, the housing space of the housing 32 may be in communication with the outside of the housing 32. The housing 32 is attached to the vehicle body 16.

[0022] The housing section 32 has a pair of side walls 44 and 45, a pair of end walls 46 and 47, a lower wall 48, and an upper wall 49. The pair of side walls 44 and 45 cover at least a portion of the high-pressure tank group 30 from a second direction (the direction in which the multiple high-pressure tanks 42 are aligned). In other words, side wall 44 covers at least a portion of the high-pressure tank group 30 from the left direction (L direction). Side wall 45 covers at least a portion of the high-pressure tank group 30 from the right direction (R direction). Each side wall 44 and 45 extends along the axial direction of the high-pressure tank 42 (the longitudinal direction of the vehicle 14).

[0023] As shown in Figure 2, the side wall portion 44 is formed in a hollow shape. This allows the side wall portion 44 to effectively absorb the collision energy of the vehicle 14 during a collision. The side wall portion 44 has a base portion 50 and a protruding portion 52.

[0024] The height dimension of the base portion 50 in the vertical direction is greater than the outer diameter of the high-pressure tank 42. Multiple first through holes 54 are formed in the base portion 50. Each first through hole 54 extends along the first direction (the longitudinal direction of the vehicle 14).

[0025] In the example shown in Figure 2, five first through-holes 54 are formed in the base portion 50. The multiple first through-holes 54 are arranged in the vertical direction. The first through-holes 54 are rectangular in shape. A first partition wall 56 is provided between adjacent first through-holes 54. The first partition wall 56 extends along the horizontal direction. By forming multiple first through-holes 54 in the base portion 50, the base portion 50 functions as an impact-absorbing structure.

[0026] The projection 52 protrudes from the base portion 50 on the side opposite to the high-pressure tank group 30. The projection 52 is connected to the lower end of the base portion 50. The projection 52 has a plurality of second through holes 58 and one hollow portion 60. Each of the second through holes 58 and the hollow portion 60 extends along the first direction (the longitudinal direction of the vehicle 14).

[0027] In the example shown in Figure 2, the protruding portion 52 has two second through holes 58. The second through holes 58 are rectangular in shape. The hollow portion 60 is located between the two second through holes 58. A second partition wall 62 is provided between the second through holes 58 and the hollow portion 60. The second partition wall 62 extends along the vertical direction. By forming multiple second through holes 58 and a hollow portion 60 in the protruding portion 52, the protruding portion 52 functions as an impact-absorbing structure.

[0028] The side wall portion 44 is provided with multiple mounting portions 64 for attaching the housing portion 32 to the vehicle body 16. The multiple mounting portions 64 are spaced apart in the front-rear direction of the vehicle 14 (see Figure 1). Each mounting portion 64 has a bolt 66 and a nut 68. The bolt 66 passes through the protruding portion 52 in the vertical direction. The bolt 66 is inserted through the hollow portion 60. The nut 68 is fixed to the vehicle body 16. The housing portion 32 is fixed to the vehicle body 16 by screwing the bolt 66 onto the nut 68. The side wall portion 45 is configured similarly to the side wall portion 44. The side wall portion 45 is attached to the vehicle body 16 by multiple mounting portions 64.

[0029] As shown in Figure 1, the end wall 46 covers at least a portion of the high-pressure tank group 30 from the front (Fr direction). The end wall 46 connects one end (the end in the Fr direction) of the pair of side wall sections 44 and 45 to each other. The end wall 46 supports one end of each high-pressure tank 42. The end wall 47 covers at least a portion of the high-pressure tank group 30 from the rear (Rr direction). The end wall 47 connects the other ends (the ends in the Rr direction) of the pair of side wall sections 44 and 45 to each other. The end wall 47 supports the other end of each high-pressure tank 42.

[0030] As shown in Figure 2, the lower wall portion 48 covers at least a portion of the high-pressure tank group 30 from below. The upper wall portion 49 covers at least a portion of the high-pressure tank group 30 from above.

[0031] As shown in Figure 1, the shut-off valve 34 is attached to the end wall portion 47. The shut-off valve 34 is a main shut-off valve for stopping the supply of fuel gas from the high-pressure tank group 30 to the supply pipe 38. The pressure reducing valve 36 reduces the fuel gas led from the shut-off valve 34 to a predetermined pressure. The supply pipe 38 supplies the fuel gas led out from the high-pressure tank group 30 to the power source 26. The supply pipe 38 is formed, for example, in the shape of a cylindrical tube (see Figure 2). The supply pipe 38 is arranged to pass through the housing space of the housing portion 32. The supply pipe 38 is located adjacent to the base portion 50 of the side wall portion 44. The size, shape, etc. of the supply pipe 38 can be set as appropriate.

[0032] Exhaust gas from the power source 26 flows through the exhaust passage 40. The exhaust gas contains moisture. In this embodiment, the fuel cell of the power source 26 discharges fuel off-gas and oxidizer off-gas. The fuel off-gas contains generated water produced during power generation. The power source 26 has a gas-liquid separator that separates the fuel off-gas into gas and liquid and stores the separated liquid water. The power source 26 discharges the liquid water stored in the gas-liquid separator into the exhaust passage 40 using the fuel off-gas. In this case, in order to dilute the fuel gas concentration (hydrogen gas concentration) discharged from the vehicle 14, the power source 26 mixes oxidizer off-gas or oxidizer gas with the fuel off-gas. Therefore, exhaust gas containing fuel off-gas and liquid water flow through the exhaust passage 40. In many situations, the exhaust gas is hotter than the fuel gas filled in the high-pressure tank 42.

[0033] The exhaust passage 40 is arranged so that the heat of the exhaust gas flowing through the exhaust passage 40 can be transferred to the high-pressure tank group 30. The exhaust passage 40 is provided in the housing section 32. The exhaust passage 40 extends rearward (in the Rr direction) from the power source 26. The exhaust passage 40 has a first exhaust passage 70 and a second exhaust passage 72. The first exhaust passage 70 guides the exhaust gas discharged from the power source 26 to a pair of side wall sections 44 and 45. The first exhaust passage 70 is formed by an exhaust pipe 74.

[0034] The exhaust pipe 74 extends rearward from the power source 26, then branches to the left and right (in the width direction of the vehicle 14) and connects to one end (the end in the Fr direction) of a pair of side wall sections 44 and 45. The second exhaust passage 72 is provided inside each of the pair of side wall sections 44 and 45. The second exhaust passage 72 is formed by a plurality of first through holes 54 and a plurality of second through holes 58 in each of the side wall sections 44 and 45.

[0035] The internal space of the exhaust pipe 74 (first exhaust passage 70) is in communication with a plurality of first through holes 54 and a plurality of second through holes 58 in each of the side walls 44 and 45. The internal space of the exhaust pipe 74 is not in communication with the hollow portions 60 of each of the side walls 44 and 45. Each of the side walls 44 and 45 is provided with a wall portion (not shown) that blocks communication between the internal space of the exhaust pipe 74 and the hollow portion 60. The exhaust outlet of the second exhaust passage 72 may be located, for example, between a pair of rear wheels 24. In this case, it is possible to prevent water contained in the exhaust gas discharged from the exhaust outlet from splashing onto the occupants when they get in or out of the vehicle through the rear door 22. The position of the exhaust outlet can be set as appropriate. The exhaust outlet may be located between a pair of front wheels 18. The exhaust outlet may be located behind the front wheels 18 and in front of the rear wheels 24 in the longitudinal direction (overall length direction) of the vehicle 14. In this case, the exhaust outlet may be located inside the pair of rear wheels 24 or inside the pair of front wheels 18 in the vehicle width direction.

[0036] Next, the operation of vehicle 14 will be described. When vehicle 14 is driven, fuel gas filled in high-pressure tank 42 is supplied to the fuel cell of power source 26 via supply pipe 38. Oxidizing gas is also supplied to the fuel cell of power source 26. In the fuel cell, hydrogen gas and oxidizing gas are consumed by an electrochemical reaction. As a result, electricity is generated. Power source 26 discharges exhaust gas containing water (liquid water) generated during power generation into exhaust passage 40. The exhaust gas flows through the first exhaust passage 70 and the second exhaust passage 72 and is discharged to the outside of vehicle 14.

[0037] When fuel gas filled in the high-pressure tank 42 is supplied to the power source 26, the fuel gas in the high-pressure tank 42 undergoes adiabatic expansion, causing the temperature of the fuel gas to decrease. In particular, when the power source 26 is operated for a long period of time at high output, the temperature of the fuel gas tends to decrease. Since a decrease in the temperature of the fuel gas can affect the durability of seals in auxiliary components, etc., this must be taken into consideration during the design process.

[0038] Relatively high-temperature exhaust gas flows through the exhaust passage 40. When the exhaust gas flows through the second exhaust passage 72, the heat from the exhaust gas is transferred to the containment space of the containment section 32. This allows the high-pressure tank group 30 housed in the containment section 32 to be heated.

[0039] Since the housing section 32 has a lower wall section 48 that covers at least a portion of the high-pressure tank group 30 from below, heat from the housing section 32 can be prevented from escaping from below. This allows the high-pressure tank group 30 to be heated efficiently. Furthermore, since the housing section 32 has an upper wall section 49 that covers at least a portion of the high-pressure tank group 30 from above, heat from the housing section 32 can be prevented from escaping from above. This allows the high-pressure tank group 30 to be heated efficiently.

[0040] Furthermore, since the supply pipe 38 (supply passage) is located in the storage space of the storage section 32, the fuel gas flowing through the supply pipe 38 can be heated. In addition, since the supply pipe 38 is adjacent to the side wall section 44 (second exhaust passage 72), the fuel gas flowing through the supply pipe 38 can be heated efficiently. The direction of flow of the exhaust gas flowing through the second exhaust passage 72 is opposite to the direction of flow of the fuel gas flowing through the supply pipe 38. In this case, counterflow heat exchange occurs between the second exhaust passage 72 and the supply pipe 38, so the fuel gas flowing through the supply pipe 38 can be heated even more efficiently.

[0041] Since the second exhaust passage 72 is provided inside each of the pair of side walls 44 and 45, the entire containment space of the containment section 32 can be efficiently heated. This reduces temperature variations between the multiple high-pressure tanks 42.

[0042] According to this embodiment, the exhaust passage 40 is arranged so that the heat of the exhaust gas flowing through it can be transferred to the high-pressure tank group 30, thereby heating the high-pressure tank 42 with the exhaust gas. This suppresses the supply of low-temperature fuel gas to the power source 26.

[0043] (First variation) Next, the high-pressure tank system 10a according to the first modified example will be described. Figure 3 is a schematic diagram of the high-pressure tank system 10a according to the first modified example. Components of the high-pressure tank system 10a according to the first modified example that are the same as those of the high-pressure tank system 10 described above are given the same reference numerals, and their detailed explanations are omitted.

[0044] As shown in Figure 3, in the high-pressure tank system 10a, an exhaust passage 40a is provided instead of the exhaust passage 40. The first exhaust passage 70a of the exhaust passage 40a guides the exhaust gas introduced from the power source 26 only to the side wall 44. The exhaust pipe 74a that forms the exhaust passage 40a is connected only to one end of the side wall 44 (the end in the Fr direction). That is, the exhaust gas flowing through the first exhaust passage 70a is not guided to the side wall 45. Therefore, the second exhaust passage 72 of the exhaust passage 40a is provided only inside the side wall 44. Even with this configuration, the same effects as the high-pressure tank system 10 described above are achieved.

[0045] The first exhaust passage 70a (exhaust pipe 74a) of the high-pressure tank system 10a may be configured to guide exhaust gas only to the side wall portion 45 and not to the side wall portion 44.

[0046] (Second variation) Next, the high-pressure tank system 10b according to the second modified example will be described. Figure 4 is a schematic cross-sectional view of the high-pressure tank system 10b according to the second modified example. Components of the high-pressure tank system 10b according to the second modified example that are the same as those of the high-pressure tank systems 10 and 10a described above are given the same reference numerals, and their detailed explanations are omitted.

[0047] As shown in Figure 4, the high-pressure tank system 10b includes a high-pressure tank group 30a, a housing section 32a, an on-off valve 34 (see Figure 1), a pressure reducing valve 36 (see Figure 1), a supply pipe 38, and an exhaust passage 40b.

[0048] The high-pressure tank group 30a comprises a first high-pressure tank group 80 and a second high-pressure tank group 82. In each of the first high-pressure tank group 80 and the second high-pressure tank group 82, the axis of each of the multiple high-pressure tanks 42 extends in a first direction along the horizontal (the longitudinal direction of the vehicle 14). In each of the first high-pressure tank group 80 and the second high-pressure tank group 82, the multiple high-pressure tanks 42 are arranged in a second direction (the width direction of the vehicle 14) that is perpendicular to the first direction and also along the horizontal.

[0049] The housing section 32a is provided with side wall sections 44a and 45a instead of the side wall sections 44 and 45 described above. The side wall section 44a has a first section 84 and a second section 86. The first section 84 covers the first high-pressure tank group 80 from the second direction (the width direction of the vehicle 14). The first section 84 is configured in the same way as the side wall section 44 described above.

[0050] The second section 86 covers the second high-pressure tank group 82 from the second direction (the width direction of the vehicle 14). The second section 86 is adjacent to the upper part of the first section 84. That is, the second section 86 is fixed to the upper part of the first section 84. The height dimension of the second section 86 in the vertical direction is greater than the outer diameter of the high-pressure tank 42. The second section 86 is formed hollow. A third through-hole 88 is formed in the second section 86. The third through-hole 88 extends in the first direction (the front-rear direction of the vehicle 14). The second section 86 is formed in a rectangular tubular shape. The side wall section 45a is configured in the same way as the side wall section 44a.

[0051] The exhaust passage 40b has a first exhaust passage 70 (see Figure 1) and a second exhaust passage 72a. The second exhaust passage 72a is formed by third through holes 88 in each side wall 44a, 45a. The internal space of the exhaust pipe 74 communicates with the third through holes 88 in each side wall 44a, 45a. The internal space of the exhaust pipe 74 does not communicate with the first through holes 54 and the second through holes 58 in each side wall 44a, 45a.

[0052] With this configuration, the heat from the exhaust gas flowing through the third through-holes 88 (second exhaust passage 72a) in each side wall portion 44a, 45a can heat the storage space of the storage portion 32a. This allows the high-pressure tank group 30a to be heated. In addition, since the first portion 84 protrudes from the second portion 86 on the opposite side from the high-pressure tank group 30a, it is possible to suppress the high-pressure tank system 10b from becoming larger in the second direction.

[0053] (Third variation) Next, the high-pressure tank system 10c according to the third modified example will be described. Figure 5 is a schematic cross-sectional view of the high-pressure tank system 10c according to the third modified example. Components of the high-pressure tank system 10c according to the third modified example that are the same as those of the high-pressure tank systems 10, 10a, and 10b described above are given the same reference numerals, and their detailed explanations are omitted.

[0054] As shown in Figure 5, the high-pressure tank system 10c includes a high-pressure tank group 30, a housing section 32b, an on-off valve 34 (see Figure 1), a pressure reducing valve 36 (see Figure 1), a supply pipe 38, an exhaust passage 40c, and a lower heat insulating member 90.

[0055] The housing section 32b has a pair of side walls 44, 45, a pair of end walls 46, 47 (see Figure 1), a lower cover section 92, and an upper wall section 49. The lower cover section 92 constitutes at least a part of the under panel of the vehicle 14. The lower cover section 92 covers at least a part of the high-pressure tank group 30 from below. The lower cover section 92 is fixed to the pair of side walls 44, 45 by mounting sections 64.

[0056] The exhaust passage 40c is arranged so that the heat of the exhaust gas flowing through the exhaust passage 40c can be transferred to the high-pressure tank group 30. The exhaust passage 40c is provided in the housing section 32b. The exhaust passage 40c has a lower exhaust passage 94. The lower exhaust passage 94 is located below the high-pressure tank group 30. In other words, the lower exhaust passage 94 is located between the high-pressure tank group 30 and the lower cover section 92. The lower exhaust passage 94 is connected to the power source 26.

[0057] The lower exhaust passage 94 includes a first lower exhaust passage 96 and a second lower exhaust passage 98. Each of the first lower exhaust passage 96 and the second lower exhaust passage 98 is formed by piping. The first lower exhaust passage 96 and the second lower exhaust passage 98 are aligned in the second direction (the width direction of the vehicle 14). A gap (space) is formed between the first lower exhaust passage 96 and the second lower exhaust passage 98. The first lower exhaust passage 96 is located below one end of the high-pressure tank group 30 in the second direction (the end in the L direction). The second lower exhaust passage 98 is located below the other end of the high-pressure tank group 30 in the second direction (the end in the R direction).

[0058] The cross-section of the first lower exhaust passage 96 is a flattened rectangular shape. The height dimension of the first lower exhaust passage 96 along the vertical direction is smaller than the width dimension of the first lower exhaust passage 96 along the second direction. The cross-section of the second lower exhaust passage 98 is a flattened rectangular shape. The height dimension of the second lower exhaust passage 98 along the vertical direction is smaller than the width dimension of the second lower exhaust passage 98 along the second direction.

[0059] The piping constituting the first lower exhaust passage 96 is in contact with or close to the lower cover portion 92. The piping constituting the second lower exhaust passage 98 is in contact with or close to the lower cover portion 92. The piping constituting the first lower exhaust passage 96 and the piping constituting the second lower exhaust passage 98 may be connected to the lower cover portion 92. In this case, the rigidity of the lower cover portion 92 can be increased.

[0060] The lower insulation member 90 is positioned between the lower exhaust passage 94 and the high-pressure tank group 30. The lower insulation member 90 covers at least a portion of the high-pressure tank group 30 from below. The lower insulation member 90 suppresses heat transfer from the lower exhaust passage 94 to the high-pressure tank group 30. The lower insulation member 90 is made of, for example, glass wool, expanded polystyrene, a heat shield, etc. The heat shield may be, for example, a steel plate.

[0061] In this modified example, the exhaust passage 40c has a lower exhaust passage 94 located below the high-pressure tank group 30. A lower heat insulating member 90 is provided between the high-pressure tank group 30 and the lower exhaust passage 94. With this configuration, the high-pressure tank group 30 can be heated by the heat of the exhaust gas flowing through the lower exhaust passage 94. In addition, the lower heat insulating member 90 can prevent the high-pressure tank 42, which is located near the lower exhaust passage 94, from overheating due to the heat of the exhaust gas flowing through the lower exhaust passage 94. Furthermore, the high-pressure tank group 30 can be protected by the lower exhaust passage 94 and the lower heat insulating member 90.

[0062] The height dimension of the lower exhaust passage 94 along the vertical direction is smaller than the width dimension of the lower exhaust passage 94 along the second direction. With this configuration, the high-pressure tank system 10c can be made smaller in the vertical direction.

[0063] The housing section 32b has a lower cover section 92 positioned below the lower exhaust passage 94. With this configuration, the lower cover section 92 can prevent heat from the exhaust gas flowing through the lower exhaust passage 94 from escaping from below the housing section 32b. In addition, the lower cover section 92 can protect the high-pressure tank group 30.

[0064] The housing section 32b has side walls 44 and 45 that cover the high-pressure tank group 30 from a second direction. The lower cover section 92 is attached to the side walls 44 and 45. The side walls 44 and 45 are provided with mounting sections 64 for attaching the housing section 32b to the vehicle body 16. With this configuration, the rigidity of the housing section 32b can be increased.

[0065] In the high-pressure tank system 10c, the lower exhaust passage 94 may omit either the first lower exhaust passage 96 or the second lower exhaust passage 98. Alternatively, the lower exhaust passage 94 may be formed by arranging three or more pipes below the high-pressure tank group 30.

[0066] (Fourth variation) Next, the high-pressure tank system 10d according to the fourth modified example will be described. Figure 6 is a schematic diagram of the high-pressure tank system 10d according to the fourth modified example. Figure 7 is a schematic cross-sectional view along line VII-VII in Figure 6. Among the components of the high-pressure tank system 10d according to the fourth modified example, those that are the same as those of the high-pressure tank systems 10, 10a to 10c described above are given the same reference numerals, and their detailed explanations are omitted.

[0067] As shown in Figures 6 and 7, the high-pressure tank system 10d includes a high-pressure tank group 30, a housing section 32c, an on-off valve 34 (see Figure 1), a pressure reducing valve 36 (see Figure 1), a supply pipe 38, an exhaust passage 40d, a lower heat insulating member 90, and an upper heat insulating member 100.

[0068] The housing section 32c has a pair of side walls 44, 45, a pair of end walls 46, 47 (see Figure 1), and a lower cover section 92. The housing section 32c does not have the lower wall section 48 and upper wall section 49 described above.

[0069] The exhaust passage 40d is arranged so that the heat of the exhaust gas flowing through the exhaust passage 40d can be transferred to the high-pressure tank group 30. The exhaust passage 40d is provided in the housing section 32c. The exhaust passage 40d has a lower exhaust passage 94a and an upper exhaust passage 102. The lower exhaust passage 94a includes a first lower exhaust passage 104 and a second lower exhaust passage 106. Each of the first lower exhaust passage 104, the second lower exhaust passage 106, and the upper exhaust passage 102 is formed by piping.

[0070] As shown in Figure 6, the first lower exhaust passage 104 is connected to the power source 26. Exhaust gas (fuel off-gas) discharged from the power source 26 and liquid water stored in the gas-liquid separator of the power source 26 flow through the first lower exhaust passage 104.

[0071] The upper exhaust passage 102 is connected to the portion of the first lower exhaust passage 104 that is forward (Fr direction) of the high-pressure tank group 30. The upper exhaust passage 102 extends diagonally upward from the first lower exhaust passage 104 toward the rear (Rr direction). Exhaust gas (fuel off-gas) flows through the upper exhaust passage 102. Liquid water discharged from the power source 26 flows in the direction of gravity and therefore does not easily flow through the upper exhaust passage 102.

[0072] A second lower exhaust passage 106 is connected to the portion of the upper exhaust passage 102 that is forward (Fr direction) of the high-pressure tank group 30. The second lower exhaust passage 106 extends diagonally downward from the upper exhaust passage 102 toward the rear (Rr direction). Exhaust gas (fuel off-gas) flows through the second lower exhaust passage 106. Because the second lower exhaust passage 106 is connected to the upper exhaust passage 102, liquid water discharged from the power source 26 has difficulty flowing through the second lower exhaust passage 106. Therefore, the proportion of liquid water in the exhaust gas flowing through the second lower exhaust passage 106 is smaller than the proportion of liquid water in the exhaust gas flowing through the first lower exhaust passage 104.

[0073] As shown in Figure 7, the first lower exhaust passage 104 and the second lower exhaust passage 106 are adjacent to each other in the second direction. In other words, the piping forming the first lower exhaust passage 104 and the piping forming the second lower exhaust passage 106 are in contact with or close to each other. The first lower exhaust passage 104 and the second lower exhaust passage 106 are located below the high-pressure tank group 30. In other words, the first lower exhaust passage 104 and the second lower exhaust passage 106 are positioned between the high-pressure tank group 30 and the lower cover section 92.

[0074] The cross-section of the first lower exhaust passage 104 is a flattened rectangular shape. The height dimension of the first lower exhaust passage 104 along the vertical direction is smaller than the width dimension of the first lower exhaust passage 104 along the second direction. The cross-section of the second lower exhaust passage 106 is a flattened rectangular shape. The height dimension of the second lower exhaust passage 106 along the vertical direction is smaller than the width dimension of the second lower exhaust passage 106 along the second direction.

[0075] The piping constituting the first lower exhaust passage 104 is in contact with or close to the lower cover portion 92. The piping constituting the second lower exhaust passage 106 is in contact with or close to the lower cover portion 92. The piping constituting the first lower exhaust passage 104 and the piping constituting the second lower exhaust passage 106 may be connected to the lower cover portion 92. In this case, the rigidity of the lower cover portion 92 can be increased.

[0076] The upper exhaust passage 102 is located above the high-pressure tank group 30. In other words, the upper exhaust passage 102 is positioned between the high-pressure tank group 30 and the floor panel 28. The upper exhaust passage 102 is located above the central part of the high-pressure tank group 30 in the second direction. The cross-section of the upper exhaust passage 102 is a flattened rectangular shape. The height dimension of the upper exhaust passage 102 along the vertical direction is smaller than the width dimension of the upper exhaust passage 102 along the second direction.

[0077] The lower heat insulating member 90 is positioned between the lower exhaust passage 94a and the high-pressure tank group 30. The lower heat insulating member 90 covers at least a portion of the high-pressure tank group 30 from below. The lower heat insulating member 90 suppresses heat transfer from the lower exhaust passage 94a to the high-pressure tank group 30. This prevents the high-pressure tank 42, which is located near the lower exhaust passage 94a, from being overheated by the heat of the exhaust gas flowing through the lower exhaust passage 94a.

[0078] The upper heat insulating member 100 is positioned between the upper exhaust passage 102 and the high-pressure tank group 30. The upper heat insulating member 100 covers at least a portion of the high-pressure tank group 30 from above. The upper heat insulating member 100 suppresses heat transfer from the upper exhaust passage 102 to the high-pressure tank group 30. This prevents the high-pressure tank 42, located near the upper exhaust passage 102, from being overheated by the heat of the exhaust gas flowing through the upper exhaust passage 102. The upper heat insulating member 100 may be made of the same material as the lower heat insulating member 90.

[0079] According to this modified version, the same effect as the high-pressure tank system 10c described in the third modified version above is achieved.

[0080] In this modified example, the lower exhaust passage 94a includes a first lower exhaust passage 104 and a second lower exhaust passage 106, which are arranged adjacent to each other in the second direction. Exhaust gas and liquid water flow through the first lower exhaust passage 104. Exhaust gas flows through the second lower exhaust passage 106.

[0081] With this configuration, even if the liquid water flowing through the first lower exhaust passage 104 freezes, the heat from the exhaust gas flowing through the second lower exhaust passage 106 can melt the ice in the first lower exhaust passage 104. This prevents the exhaust passage 40d from becoming completely blocked when the power source 26 is operated in a sub-zero environment.

[0082] The exhaust passage 40d has an upper exhaust passage 102 located above the high-pressure tank group 30. An upper heat insulating member 100 is provided between the high-pressure tank group 30 and the upper exhaust passage 102.

[0083] With this configuration, the high-pressure tank group 30 can be heated by the heat of the exhaust gas flowing through the upper exhaust passage 102. In addition, it is possible to prevent the high-pressure tank 42, which is relatively close to the upper exhaust passage 102, from being overheated by the exhaust gas flowing through the upper exhaust passage 102. Furthermore, the high-pressure tank group 30 can be protected by the upper exhaust passage 102 and the upper heat insulating member 100.

[0084] The height dimension of the upper exhaust passage 102 along the vertical direction is smaller than the width dimension of the upper exhaust passage 102 along the second direction. With this configuration, the high-pressure tank system 10d can be made smaller in the vertical direction.

[0085] (Fifth variation) Next, the high-pressure tank system 10e according to the fifth modified example will be described. Figure 8 is a schematic cross-sectional view of the high-pressure tank system 10e according to the fifth modified example. Components of the high-pressure tank system 10e according to the fifth modified example that are the same as those of the high-pressure tank systems 10, 10a to 10d described above are given the same reference numerals, and their detailed explanations are omitted.

[0086] As shown in Figure 8, the high-pressure tank system 10e includes a high-pressure tank group 30, a housing section 32d, an on-off valve 34 (see Figure 1), a pressure reducing valve 36 (see Figure 1), a supply pipe 38, an exhaust passage 40e, a lower heat insulating member 90a, and an upper heat insulating member 100a.

[0087] The housing section 32d has a pair of side walls 44, 45, a pair of end walls 46, 47 (see Figure 1), a lower wall 48, a lower cover 92, and an upper wall 49. The exhaust passage 40e is arranged so that the heat of the exhaust gas flowing through the exhaust passage 40e can be transferred to the high-pressure tank group 30. The exhaust passage 40e is provided in the housing section 32d.

[0088] The exhaust passage 40e has a lower exhaust passage 94b and an upper exhaust passage 102a. Each of the lower exhaust passage 94b and the upper exhaust passage 102a is formed by piping. The lower exhaust passage 94b is located below the central part in the second direction of the high-pressure tank group 30. The cross-section of the lower exhaust passage 94b is a flattened rectangular shape. The height dimension of the lower exhaust passage 94b along the vertical direction is smaller than the width dimension of the lower exhaust passage 94b along the second direction.

[0089] The piping constituting the lower exhaust passage 94b is in contact with or close to the lower cover portion 92. The piping constituting the lower exhaust passage 94b may be connected to the lower cover portion 92. In this case, the rigidity of the lower cover portion 92 can be increased.

[0090] The lower insulation member 90a is located between the lower wall portion 48 and the lower exhaust passage 94b. The lower insulation member 90a is attached to the outer surface of the lower wall portion 48. The lower insulation member 90a is provided in the central part of the lower wall portion 48 in the second direction. The lower insulation member 90a is not provided at either end of the lower wall portion 48 in the second direction. The lower insulation member 90a is made of the same material as the lower insulation member 90 described above.

[0091] The upper insulation member 100a is located between the upper wall portion 49 and the upper exhaust passage 102a. The upper insulation member 100a is attached to the outer surface of the upper wall portion 49. The upper insulation member 100a is provided in the central part of the upper wall portion 49 in the second direction. The upper insulation member 100a is not provided at either end of the upper wall portion 49 in the second direction. The upper insulation member 100a is made of the same material as the lower insulation member 90 described above.

[0092] The high-pressure tank system 10e according to this modified example provides the same effects as the high-pressure tank systems 10c and 10d described above.

[0093] In the high-pressure tank system 10e, either the upper exhaust passage 102a or the lower exhaust passage 94b may be omitted.

[0094] In the high-pressure tank systems 10, 10a to 10e described above, the exhaust passages 40, 40a to 40e are arranged such that the heat of the exhaust gas flowing through them can be transferred to the high-pressure tank groups 30, 30a. As a result, the high-pressure tank 42 can be heated by the exhaust gas. This prevents the supply of low-temperature fuel gas to the power source 26.

[0095] The following additional information is disclosed regarding the above embodiments.

[0096] (Note 1) The high-pressure tank system (10, 10a-10e) of the present disclosure comprises a high-pressure tank group (30, 30a) having a plurality of cylindrical high-pressure tanks (42) filled with fuel gas to be supplied to a power source (26), a housing section (32, 32a-32d) housing the high-pressure tank group, and an exhaust passage (40, 40a-40e) through which exhaust gas led from the power source flows, wherein the exhaust passage is provided in the housing section such that the heat of the exhaust gas flowing through the exhaust passage can be transferred to the high-pressure tank group.

[0097] With this configuration, the exhaust passage is provided in the housing so that the heat of the exhaust gas flowing through the exhaust passage can be transferred to the high-pressure tank group. As a result, the high-pressure tanks located in the housing space of the housing can be heated by the heat of the exhaust gas. This prevents the supply of low-temperature fuel gas to the power source.

[0098] (Note 2) The high-pressure tank system described in Appendix 1, wherein the axis of each of the plurality of high-pressure tanks extends in a first direction along the horizontal direction, the plurality of high-pressure tanks are arranged in a second direction perpendicular to the first direction and along the horizontal direction, the housing has side wall portions (44, 44a, 45, 45a) that cover the group of high-pressure tanks from the second direction, and the exhaust passage may be provided in the side wall portions.

[0099] With this configuration, the high-pressure tanks can be efficiently heated by the heat of the exhaust gas flowing through the exhaust passage.

[0100] (Note 3) The high-pressure tank system described in Appendix 2, wherein the side wall and the exhaust passage may extend along the first direction.

[0101] With this configuration, exhaust gas can be circulated along the axial direction of the high-pressure tank, allowing the high-pressure tank group to be heated more efficiently.

[0102] (Note 4) The high-pressure tank system described in Appendix 3, wherein the exhaust passage may be provided inside the side wall.

[0103] This configuration allows for a smaller high-pressure tank system.

[0104] (Note 5) The high-pressure tank system described in Appendix 4, wherein through holes (54, 58, 88) extending along the first direction are formed in the side wall portion, and at least a portion of the exhaust passage is formed by the through holes.

[0105] With this configuration, there is no need to run pipes inside the side walls, allowing for a simpler design for the side walls.

[0106] (Note 6) A high-pressure tank system as described in any one of appendices 2 to 5, wherein the side wall portion may be provided with a mounting portion (64) for attaching the housing portion to the vehicle body (16).

[0107] This configuration allows for increased rigidity of the side walls. As a result, the housing can more safely protect the group of high-pressure tanks.

[0108] (Note 7) The high-pressure tank system of the present disclosure comprises a group of high-pressure tanks having a plurality of cylindrical high-pressure tanks filled with fuel gas to be supplied to a power source, a housing section housing the group of high-pressure tanks, and an exhaust passage through which exhaust gas led from the power source flows, wherein the exhaust passage is arranged such that the heat of the exhaust gas flowing through the exhaust passage can be transferred to the group of high-pressure tanks, the axis of each of the plurality of high-pressure tanks extends in a first direction along the horizontal direction, the plurality of high-pressure tanks are arranged in a second direction perpendicular to the first direction and along the horizontal direction, and the housing section is the The high-pressure tank group has a side wall that covers the high-pressure tank group from two directions, the exhaust passage is provided in the side wall, the high-pressure tank group comprises a first high-pressure tank group (80) and a second high-pressure tank group (82) arranged adjacent to each other in the vertical direction, the side wall has a first portion (84) that covers the first high-pressure tank group from the second direction, and a second portion (86) that is adjacent to the first portion in the vertical direction and covers the second high-pressure tank group from the second direction, the exhaust passage is provided in the second portion, and the first portion protrudes from the second portion on the side opposite to the high-pressure tank group.

[0109] With this configuration, the heat from the exhaust gas flowing through the exhaust passage in the second section can heat the containment space in the containment section. This allows the high-pressure tank group to be heated. Furthermore, since the first section protrudes from the second section on the opposite side from the high-pressure tank group, the high-pressure tank system can be made smaller while still providing an exhaust passage in the containment section. This prevents the high-pressure tank system from becoming larger in the second direction.

[0110] (Note 8) The high-pressure tank system of the present disclosure comprises a group of high-pressure tanks having a plurality of cylindrical high-pressure tanks filled with fuel gas to be supplied to a power source, a housing for housing the group of high-pressure tanks, and an exhaust passage through which exhaust gas led from the power source flows, wherein the exhaust passage is arranged such that the heat of the exhaust gas flowing through the exhaust passage can be transferred to the group of high-pressure tanks, the axis of each of the plurality of high-pressure tanks extends in a first direction along the horizontal direction, the plurality of high-pressure tanks are arranged in a second direction perpendicular to the first direction and along the horizontal direction, the exhaust passage has a lower exhaust passage (94, 94a, 94b) located below the group of high-pressure tanks, and a lower heat insulating member (90, 90a) is provided between the group of high-pressure tanks and the lower exhaust passage.

[0111] With this configuration, the high-pressure tank group can be heated by the heat of the exhaust gas flowing through the lower exhaust passage. Furthermore, the lower insulating member can prevent the high-pressure tanks located near the lower exhaust passage from overheating due to the heat of the exhaust gas flowing through the lower exhaust passage. In addition, the lower exhaust passage and the lower insulating member can protect the high-pressure tank group.

[0112] (Note 9) The high-pressure tank system described in Appendix 8, wherein the height dimension of the lower exhaust passage in the vertical direction may be smaller than the width dimension of the lower exhaust passage in the second direction.

[0113] This configuration allows the high-pressure tank system to be made smaller in the vertical direction.

[0114] (Note 10) The high-pressure tank system described in Appendix 8 or 9, wherein the housing portion may have a lower cover portion (92) located below the lower exhaust passage.

[0115] With this configuration, the lower cover prevents heat from the exhaust gas flowing through the lower exhaust passage from escaping from below the containment section. Furthermore, the lower cover protects the high-pressure tank group.

[0116] (Note 11) The high-pressure tank system described in Appendix 10, wherein the housing has a side wall that covers the group of high-pressure tanks from the second direction, the lower cover is attached to the side wall, and the side wall may be provided with a mounting portion for attaching the housing to the vehicle body.

[0117] This configuration allows for increased rigidity of the housing section.

[0118] (Note 12) A high-pressure tank system as described in any one of appendices 8 to 11, wherein the lower exhaust passage includes a first lower exhaust passage (104) and a second lower exhaust passage (106) arranged adjacent to each other in the second direction, and the proportion of liquid water contained in the exhaust gas flowing through the second lower exhaust passage may be smaller than the proportion of liquid water contained in the exhaust gas flowing through the first lower exhaust passage.

[0119] With this configuration, even if the liquid water flowing through the first lower exhaust passage freezes, the heat from the exhaust gas flowing through the second lower exhaust passage can melt the ice in the first lower exhaust passage. This prevents the exhaust passage from becoming completely blocked when operating the power source in sub-zero temperatures.

[0120] (Note 13) The high-pressure tank system of the present disclosure comprises a group of high-pressure tanks having a plurality of cylindrical high-pressure tanks filled with fuel gas to be supplied to a power source, a housing for housing the group of high-pressure tanks, and an exhaust passage through which exhaust gas led from the power source flows, wherein the exhaust passage is arranged such that the heat of the exhaust gas flowing through the exhaust passage can be transferred to the group of high-pressure tanks, the axis of each of the plurality of high-pressure tanks extends in a first direction along the horizontal direction, the plurality of high-pressure tanks are arranged in a second direction perpendicular to the first direction and along the horizontal direction, the exhaust passage has an upper exhaust passage (102, 102a) positioned above the group of high-pressure tanks, and an upper heat insulating member (100, 100a) is provided between the group of high-pressure tanks and the upper exhaust passage.

[0121] With this configuration, the high-pressure tanks can be heated by the heat of the exhaust gas flowing through the upper exhaust passage. Furthermore, it is possible to prevent high-pressure tanks relatively close to the upper exhaust passage from being overheated by the exhaust gas flowing through it. In addition, the high-pressure tanks can be protected by the upper exhaust passage and the upper insulating member.

[0122] (Note 14) The high-pressure tank system described in Appendix 13, wherein the height dimension of the upper exhaust passage in the vertical direction may be smaller than the width dimension of the upper exhaust passage in the second direction.

[0123] This configuration allows the high-pressure tank system to be made smaller in the vertical direction.

[0124] (Note 15) The high-pressure tank system described in Appendix 14 may have a lower cover portion located below the group of high-pressure tanks.

[0125] With this configuration, the lower cover prevents heat from escaping from the bottom of the containment compartment. Furthermore, the lower cover protects the high-pressure tanks.

[0126] (Note 16) The high-pressure tank system described in Appendix 15, wherein the housing has a side wall that covers the group of high-pressure tanks from the second direction, the lower cover is attached to the side wall, and the side wall may be provided with a mounting portion for attaching the housing to the vehicle body.

[0127] This configuration allows for increased rigidity of the housing section.

[0128] (Note 17) A high-pressure tank system as described in any one of the appendices 1 to 16, wherein the power source is a fuel cell or a hydrogen engine, and the fuel gas may be hydrogen gas.

[0129] With this configuration, the hydrogen gas supplied to the power source can be heated by the exhaust gas.

[0130] (Note 18) The mobile body (12) of this disclosure comprises a high-pressure tank system as described in any one of appendices 1 to 17, and the power source.

[0131] With this configuration, a mobile body having the effects described in Appendices 1 to 17 can be obtained.

[0132] While this disclosure has been described in detail, it is not limited to the individual embodiments described above. These embodiments can be added, replaced, modified, partially deleted, etc., in any way that does not depart from the gist of this disclosure or from the spirit of this disclosure derived from the claims and their equivalents. These embodiments can also be implemented in combination. For example, the order of operations and processes in the embodiments described above are given as examples only and are not limited thereto. The same applies when numerical values ​​or mathematical formulas are used in the description of the embodiments described above. [Explanation of symbols]

[0133] 10, 10a~10e... High-pressure tank system 12... Mobile unit 16... Vehicle body 26...Power source 30, 30a...High-pressure tank group 32, 32a~32d...Housing section 40, 40a~40e...Exhaust passage 42... High-pressure tank 44, 44a, 45, 45a... Side wall 54...First through hole (through hole) 58...Second through hole (through hole) 64...Mounting section 80...First high-pressure tank group 82...Second high-pressure tank group 84...First section 86...Second part 88...Third through hole (through hole) 90, 90a...Lower insulation member 92...Lower cover 94, 94a, 94b...lower exhaust flow path 96...first lower exhaust flow path 98...Second lower exhaust passage 100, 100a...Upper insulation member 102, 102a... Upper exhaust passage 104... First lower exhaust passage 106…Second lower exhaust flow path

Claims

1. A group of high-pressure tanks having multiple cylindrical high-pressure tanks filled with fuel gas to supply power to a power source, A housing section for housing the aforementioned high-pressure tank group, An exhaust passage through which exhaust gas from the aforementioned power source flows, Equipped with, A high-pressure tank system in which the exhaust passage is provided in the housing section such that the heat of the exhaust gas flowing through the exhaust passage can be transferred to the group of high-pressure tanks.

2. A high-pressure tank system according to claim 1, The axis of each of the multiple high-pressure tanks extends in a first direction along the horizontal direction, The multiple high-pressure tanks are arranged in a second direction that is perpendicular to the first direction and along the horizontal direction, The aforementioned housing section has side walls that cover the group of high-pressure tanks from the second direction, The exhaust passage is provided in the side wall portion of the high-pressure tank system.

3. A high-pressure tank system according to claim 2, A high-pressure tank system wherein the side wall portion and the exhaust passage extend along the first direction.

4. A high-pressure tank system according to claim 3, The exhaust passage is a high-pressure tank system provided inside the side wall.

5. A high-pressure tank system according to claim 4, A through hole extending along the first direction is formed in the side wall portion. A high-pressure tank system in which at least a portion of the exhaust passage is formed by the through-hole.

6. A high-pressure tank system according to claim 2, A high-pressure tank system, wherein the side wall portion is provided with a mounting portion for attaching the housing portion to the vehicle body.

7. A group of high-pressure tanks having multiple cylindrical high-pressure tanks filled with fuel gas to supply power to a power source, A housing section for housing the aforementioned high-pressure tank group, An exhaust passage through which exhaust gas from the aforementioned power source flows, Equipped with, The exhaust passage is arranged such that the heat of the exhaust gas flowing through the exhaust passage can be transferred to the group of high-pressure tanks. The axis of each of the multiple high-pressure tanks extends in a first direction along the horizontal direction, The multiple high-pressure tanks are arranged in a second direction that is perpendicular to the first direction and along the horizontal direction, The aforementioned housing section has side walls that cover the group of high-pressure tanks from the second direction, The exhaust passage is provided in the side wall portion, The high-pressure tank group comprises a first high-pressure tank group and a second high-pressure tank group arranged adjacent to each other in the vertical direction. The aforementioned side wall portion is A first portion covering the first group of high-pressure tanks from the second direction, A second portion adjacent to the first portion in the vertical direction and covering the second high-pressure tank group from the second direction, It has, The exhaust passage is provided in the second part, A high-pressure tank system in which the first part protrudes from the second part on the side opposite to the group of high-pressure tanks.

8. A group of high-pressure tanks having multiple cylindrical high-pressure tanks filled with fuel gas to supply power to a power source, A housing section for housing the aforementioned high-pressure tank group, An exhaust passage through which exhaust gas from the aforementioned power source flows, Equipped with, The exhaust passage is arranged such that the heat of the exhaust gas flowing through the exhaust passage can be transferred to the group of high-pressure tanks. The axis of each of the multiple high-pressure tanks extends in a first direction along the horizontal direction, The multiple high-pressure tanks are arranged in a second direction that is perpendicular to the first direction and along the horizontal direction, The exhaust passage has a lower exhaust passage located below the group of high-pressure tanks, A high-pressure tank system in which a lower heat insulating member is provided between the group of high-pressure tanks and the lower exhaust passage.

9. A high-pressure tank system according to claim 8, A high-pressure tank system in which the height dimension of the lower exhaust passage in the vertical direction is smaller than the width dimension of the lower exhaust passage in the second direction.

10. A high-pressure tank system according to claim 8, The aforementioned storage section is a high-pressure tank system having a lower cover section located below the lower exhaust passage.

11. A high-pressure tank system according to claim 10, The aforementioned housing section has side walls that cover the group of high-pressure tanks from the second direction, The lower cover portion is attached to the side wall portion. A high-pressure tank system, wherein the side wall portion is provided with a mounting portion for attaching the housing portion to the vehicle body.

12. A high-pressure tank system according to claim 8, The lower exhaust passage includes a first lower exhaust passage and a second lower exhaust passage arranged adjacent to each other in the second direction. A high-pressure tank system in which the proportion of liquid water contained in the exhaust gas flowing through the second lower exhaust passage is smaller than the proportion of liquid water contained in the exhaust gas flowing through the first lower exhaust passage.

13. A group of high-pressure tanks having multiple cylindrical high-pressure tanks filled with fuel gas to supply power to a power source, A housing section for housing the aforementioned high-pressure tank group, An exhaust passage through which exhaust gas from the aforementioned power source flows, Equipped with, The exhaust passage is arranged such that the heat of the exhaust gas flowing through the exhaust passage can be transferred to the group of high-pressure tanks. The axis of each of the multiple high-pressure tanks extends in a first direction along the horizontal direction, The multiple high-pressure tanks are arranged in a second direction that is perpendicular to the first direction and along the horizontal direction, The exhaust passage has an upper exhaust passage located above the group of high-pressure tanks, A high-pressure tank system in which an upper heat insulating member is provided between the group of high-pressure tanks and the upper exhaust passage.

14. A high-pressure tank system according to claim 13, A high-pressure tank system in which the height dimension of the upper exhaust passage in the vertical direction is smaller than the width dimension of the upper exhaust passage in the second direction.

15. A high-pressure tank system according to claim 14, The storage section is a high-pressure tank system having a lower cover section located below the group of high-pressure tanks.

16. A high-pressure tank system according to claim 15, The aforementioned housing section has side walls that cover the group of high-pressure tanks from the second direction, The lower cover portion is attached to the side wall portion. A high-pressure tank system, wherein the side wall portion is provided with a mounting portion for attaching the housing portion to the vehicle body.

17. A high-pressure tank system according to claim 1, The aforementioned power source includes a fuel cell or a hydrogen engine. The fuel gas is hydrogen gas in the high-pressure tank system.

18. A high-pressure tank system according to any one of claims 1 to 17, The aforementioned power source, A mobile device equipped with [the necessary components].

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