JP2022073238A - Fuel cell mounting system - Google Patents

Abstract

To provide a fuel cell mounting system with improved safety against hydrogen leakage.SOLUTION: A fuel cell vehicle 1 comprises: a vehicle body having a frame structure with a pair of side members 2; a fuel cell FC; a first hydrogen tank TNK1; a second hydrogen tank TNK2 arranged posterior to the first hydrogen tank TNK1; first hydrogen piping L1 connecting the fuel cell FC and the first hydrogen tank TNK1; and second hydrogen piping L2 connecting the fuel cell FC and the second hydrogen tank TNK2. The first hydrogen tank TNK1 and the second hydrogen tank TNK2 are arranged outside the side members 2 in a vehicle width direction. In an anterior view, the second hydrogen piping L2 is positioned higher than a vertical center of the first hydrogen tank TNK1, lower than an upper edge section of the first hydrogen tank TNK1, outside the pair of side members 2 in the vehicle width direction, and closer to a center of a vehicle than a central section of the first hydrogen tank TNK1 in the vehicle width direction.SELECTED DRAWING: Figure 3

Description

The present invention relates to a fuel cell mounting system equipped with a fuel cell.

Conventionally, as one of the fuel cell-mounted systems, a vehicle equipped with a fuel cell (hereinafter referred to as a "fuel cell vehicle") has been known. In a fuel cell vehicle, H ₂ gas (hereinafter referred to as "hydrogen") as a fuel and O ₂ gas (hereinafter referred to as "oxygen") in the air as an oxidizing agent are supplied to the fuel cell, and both react with each other. The electric power generated when water (steam) is generated is taken out to the outside and used as the electric power for driving the driving electric motor. Because fuel cell vehicles emit only water vapor when driving, and do not emit air pollutants such as nitrogen oxides (NOx) and sulfur oxides (SOx), or carbon dioxide (CO ₂ ), which is a cause of global warming. As an environmentally friendly vehicle, it is expected to be widely used not only in passenger cars but also in commercial vehicles such as trucks.

On the other hand, hydrogen, which is the fuel for fuel cells, is the lightest gas and is extremely easy to burn and explode. Therefore, in fuel cell vehicles, in addition to measures to prevent hydrogen leakage, early detection and leakage should occur if hydrogen leaks. Prevention of retention of the emitted hydrogen and prompt discharge are required as indispensable measures.

Japanese Unexamined Patent Publication No. 8-177641 Japanese Patent Application Laid-Open No. 2003-211982

For example, Patent Document 1 describes commercial vehicles such as trucks and buses that supply an engine with natural gas compressed and filled in a tank as fuel. Natural gas, like hydrogen, is very easy to burn and explode. However, although Patent Document 1 describes a check valve for preventing backflow leakage of natural gas, there is no description of specific safety measures in case natural gas leaks.

Further, for example, Patent Document 2 describes a fuel cell vehicle in which a fragile portion is provided in a low-pressure hydrogen pipe to prevent the high-pressure hydrogen pipe from being deformed even if the vehicle is deformed at the time of a rear surface collision. It does not describe measures to prevent hydrogen leakage in commercial vehicles such as trucks, which have longer hydrogen pipes than passenger cars.

The present invention provides a fuel cell-mounted system with improved safety against hydrogen leakage.

The present invention
It has a frame structure extending in a first direction perpendicular to the vertical direction and having a pair of side members facing each other in the second direction perpendicular to both the vertical direction and the first direction.
With a fuel cell
A first hydrogen tank filled with hydrogen by compression,
A second hydrogen tank filled with hydrogen by compression,
A first hydrogen pipe connecting the fuel cell and the first hydrogen tank,
A fuel cell-mounted system including a second hydrogen pipe connecting the fuel cell and the second hydrogen tank.
The first hydrogen tank is arranged between the fuel cell and the second hydrogen tank in the first direction.
The first hydrogen tank and the second hydrogen tank are arranged outside the second direction with respect to the pair of side members.
The second hydrogen pipe is above the vertical center of the first hydrogen tank and above the first hydrogen tank in the region overlapping the first hydrogen tank in the first direction when viewed from the first direction. It is located below the upper end of the hydrogen tank, outside the second direction of the pair of side members, and inside the second direction of the center of the first hydrogen tank in the second direction.

According to the present invention, the second hydrogen pipe is above the center in the vertical direction of the first hydrogen tank and above the center in the vertical direction when viewed from the first direction in the region overlapping the first hydrogen tank in the first direction, and the first hydrogen tank. Since it is located below the upper end of the fuel cell, outside the pair of side members in the second direction, and inside the second direction of the center of the first hydrogen tank in the second direction, the fuel cell mounting system The second hydrogen pipe is protected by the first hydrogen tank even when the second hydrogen pipe is impacted from the outside in the second direction. As a result, when the fuel cell mounting system is impacted from the outside in the second direction, the second hydrogen pipe is placed outside the second direction from the side member while reducing the risk of damaging the second hydrogen pipe and leaking hydrogen. Since the second hydrogen pipe connected to the second hydrogen tank can be arranged outside the side member in the second direction, the length of the second hydrogen pipe can be shortened, and the second hydrogen pipe is damaged and hydrogen leaks. The risk of getting out can be further reduced. In this way, the fuel cell-mounted system is improved in safety against hydrogen leakage.

It is a schematic top view which shows the fuel cell vehicle of one Embodiment of this invention. It is a schematic side view of the fuel cell vehicle of FIG. It is a figure which showed the main part in the AA cross section of FIG. It is a figure which showed the modification of the tank fixing member in the fuel cell vehicle of FIG.

Hereinafter, an embodiment of a fuel cell vehicle as an example of the fuel cell-mounted system of the present invention will be described in detail with reference to the accompanying drawings. The drawings shall be viewed in the direction of the reference numerals. Further, in the following description, each direction of front / rear, left / right, and up / down is described according to the direction seen from the driver of the vehicle, and in the drawing, the front of the vehicle is Fr, the rear is Rr, the right is R, and the left. Is L, the upper part is U, and the lower part is D.

[Fuel cell vehicle]
As shown in FIGS. 1 and 2, in the fuel cell vehicle 1, a pair of left and right side members 2 extending in the front-rear direction and left and right side members 2 extending in the vehicle width direction are connected between the left and right side members 2. It has a vehicle body having a frame structure formed in a ladder shape by a plurality of cross members 3. Above the front end of the pair of left and right side members 2, there is provided a cabin 4 in which a seat 6 for occupants is seated. The guest room 4 is arranged at the front of the fuel cell vehicle 1. A loading platform 5 is provided above the left and right side members 2 behind the guest room 4. Below the guest room 4, a pair of left and right front wheel forwards are provided. A pair of left and right rear front wheels RW1 and rear rear wheels RW2 are provided behind the front wheels FW. The rear front wheel RW1 has two wheels on each of the left and right sides, and the rear rear wheel RW2 has two wheels on each of the left and right sides behind the rear front wheel RW1. The rear front wheel RW1 and the rear rear wheel RW2 are provided on the outer sides of the pair of left and right side members 2 in the vehicle width direction.

Two fuel cell FCs are mounted below the cabin 4. The two fuel cell FCs are arranged side by side in the vehicle width direction. On the outside in the vehicle width direction of the pair of left and right side members 2, two first hydrogen tanks TNK1 and two second hydrogen tanks TNK2, which are compression-filled with hydrogen supplied to the fuel cell FC, below the loading platform 5. Is provided.

A storage space 7 in which two fuel cell FCs are housed is formed below the guest room 4. The interior of the guest room 4 and the accommodation space 7 are partitioned so that hydrogen does not flow, and the upper part of the accommodation space 7 is covered with a ceiling surface formed by the bottom of the guest room 4, and the rear portion is open. There is.

The fuel cell FC has, for example, a single cell of a polymer electrolyte fuel cell in which an ion exchange membrane (proton exchange membrane) is sandwiched between a pair of electrodes consisting of a fuel electrode (anode) and an oxygen electrode (cathode), and a separator ( A fuel cell stack having a structure in which hundreds of single cells are stacked and connected in series via a bipolar plate) is used. A catalyst made of platinum (Pt) or the like is provided in a layer near the interface between each electrode and the ion exchange membrane, and hydrogen supplied to the fuel electrode is decomposed into electrons and hydrogen ions (protons) by the action of the catalyst. Electrons are taken out to an external circuit connected to the fuel electrode, and hydrogen ions pass through the ion exchange membrane and reach the oxygen electrode. At the oxygen electrode, hydrogen ions, oxygen in the air, and electrons that arrive through an external circuit combine to generate water due to the action of a catalyst, and the flow of electrons taken out to the external circuit in this series of processes is the power generated. It is used as.

The two first hydrogen tanks TNK1 are provided one on the outside in the vehicle width direction of the pair of left and right side members 2. In the present embodiment, the left and right first hydrogen tanks TNK1 are both arranged in front of the rear front wheel RW1 and the rear rear wheel RW2.

The left and right first hydrogen tanks TNK1 are supported by tank fixing members 10 fixed to the left and right side members 2. In the present embodiment, the tank fixing member 10 accommodates the first hydrogen tank TNK1 and extends from the front of the first hydrogen tank TNK1 to the rear of the first hydrogen tank TNK1 in the front-rear direction.

The first hydrogen tank TNK1 has a tank body extending in a cylindrical shape in the front-rear direction, a hemispherical tank front end that closes the front end of the tank body, and a hemispherical tank rear end that closes the rear end of the tank body. , Are integrated. A filling / discharging hole 8 for filling and discharging hydrogen is provided near the center of the front end of the first hydrogen tank TNK1.

The two second hydrogen tanks TNK2 are provided one on the outside in the vehicle width direction of the pair of left and right side members 2. The left and right second hydrogen tanks TNK2 are both arranged behind the first hydrogen tank TNK1. In the present embodiment, the left and right second hydrogen tanks TNK2 are both behind the first hydrogen tank TNK1, and are further arranged behind the rear front wheel RW1 and the rear wheel RW2.

The second hydrogen tank TNK2 has a tank body extending in a cylindrical shape in the front-rear direction, a hemispherical tank front end that closes the front end of the tank body, and a hemispherical tank rear end that closes the rear end of the tank body. , And a filling / discharging hole 9 for filling and discharging hydrogen is provided near the center of the front end of the tank.

The second hydrogen tank TNK2 has a smaller diameter than the first hydrogen tank TNK1, and the forward projected area is smaller than the first hydrogen tank TNK1. The second hydrogen tank TNK2 is arranged at a position hidden behind the first hydrogen tank TNK1 in front view.

Thereby, when the fuel cell vehicle 1 is running, the air resistance generated by the second hydrogen tank TNK2 can be reduced.

To fill the first hydrogen tank TNK1 and the second hydrogen tank TNK2 with hydrogen, for example, the filling nozzle attached to the tip of the hose of the hydrogen dispenser installed in the hydrogen station is used as the first hydrogen tank TNK1 and the second hydrogen. After fitting into the hydrogen filling inlet (not shown) connected to the filling / discharging holes 8 and 9 of the tank TNK2 via a pipe (not shown), the hydrogen compressed from the hydrogen dispenser is used in the first hydrogen tank TNK1 and the second. This can be done by supplying the hydrogen tank TNK2.

The fuel cell vehicle 1 includes a pair of left and right first hydrogen pipes L1 that connect the fuel cell FC and the filling / discharging holes 8 of the left and right first hydrogen tanks TNK1. The fuel cell vehicle 1 includes a pair of left and right second hydrogen pipes L2 that connect the fuel cell FC and the filling / discharging holes 9 of the left and right second hydrogen tanks TNK2.

The pair of left and right first hydrogen pipes L1 are connected to the filling / discharging holes 8 of each of the left and right first hydrogen tanks TNK1 on the outside of the side member 2 in the vehicle width direction, and are connected to the outside of the side member 2 in the vehicle width direction. It extends in the front-rear direction along the side member 2.

The pair of left and right second hydrogen pipes L2 are connected to the filling / discharging holes 9 of each of the left and right second hydrogen tanks TNK2 on the outside of the side member 2 in the vehicle width direction, and are connected to the outside of the side member 2 in the vehicle width direction. Moreover, it extends in the front-rear direction along the side member 2 inside the vehicle width direction from the first hydrogen pipe L1.

Each first hydrogen pipe L1 and each second hydrogen pipe L2 are provided with a heat-operated overpressure prevention safety device TPRD (Temperature activated Pressure Relief Device) between the passenger compartment 4 and the loading platform 5 in the front-rear direction. ing.

The first hydrogen tank TNK1 and the second hydrogen tank TNK2 are filled with hydrogen at a high pressure of, for example, about 70 MPa (about 700 atm). Therefore, when the internal temperature of the first hydrogen tank TNK1 and the second hydrogen tank TNK2 rises due to the influence of the external environment or the like, the filled hydrogen expands and the first hydrogen tank TNK1 and the second hydrogen tank TNK2 are damaged. There is a risk. The heat-operated overpressure prevention safety device TPRD is one of the hydrogens filled in the first hydrogen tank TNK1 and the second hydrogen tank TNK2 when the internal temperature of the first hydrogen tank TNK1 and the second hydrogen tank TNK2 reaches a predetermined temperature. It is a device for operating the unit so as to safely release it into the atmosphere and avoiding damage to the first hydrogen tank TNK1 and the second hydrogen tank TNK2.

Between the pair of left and right side members 2, a drive motor MOT, a secondary battery BAT, and a control unit PCU are mounted below the loading platform 5. The drive motor MOT drives at least one of a pair of left and right rear front wheels RW1 and rear rear wheels RW2. The secondary battery BAT is a rechargeable storage battery such as a lithium ion battery, a nickel hydrogen battery, or a capacitor. The control unit PCU can convert DC power into AC power and AC power into DC power, and charges / discharges the secondary battery BAT and inputs / outputs power of the drive motor MOT according to the running state of the fuel cell vehicle 1. It is a device that controls.

The secondary battery BAT and the control unit PCU are arranged in front of the drive motor MOT. In the present embodiment, the control unit PCU is arranged between the secondary battery BAT and the drive motor MOT in the front-rear direction, but the positional relationship between the secondary battery BAT and the control unit PCU is arbitrary. For example, the secondary battery BAT and the control unit PCU may be arranged separately, or the secondary battery BAT and the control unit PCU may be arranged as an IPU (Intelligent Power Unit) housed in one housing.

The fuel cell FC, the drive motor MOT, the secondary battery BAT, and the control unit PCU are electrically connected by a power line Le. The power line Le includes a three-phase AC first power line Le1 that electrically connects the drive motor MOT and the control unit PCU, and a DC second power line Le2 that electrically connects the fuel cell FC and the control unit PCU. It also has a DC third power line Le3 that electrically connects the secondary battery BAT and the control unit PCU. The power line Le including the first power line Le1, the second power line Le2, and the third power line Le3 is arranged between the pair of left and right side members 2 in the vehicle width direction.

In the fuel cell vehicle 1, the fuel cell FC is used as a generator for generating electric power for driving the driving electric motor MOT. Hydrogen as fuel is supplied from the first hydrogen tank TNK1 and / or the second hydrogen tank TNK2 to the fuel cell FC through the first hydrogen pipe L1 and / or the second hydrogen pipe L2, and oxygen in the air is used as an oxidizing agent. By being supplied to the fuel cell FC, DC power is generated in the fuel cell FC. The DC power generated by the fuel cell FC is boosted by a boost converter (not shown) as needed, and then flows to the control unit PCU through the second power line Le2, depending on the running state of the fuel cell vehicle 1. It is distributed from the control unit PCU to the power converted into three-phase AC power and supplied to the drive motor MOT through the first power line Le1 and the power charged from the control unit PCU to the secondary battery BAT through the third power line Le3. Will be done. Depending on the running state of the fuel cell vehicle 1, all of the DC power generated by the fuel cell FC may be supplied to the drive motor MOT through the first power line Le1 or from the control unit PCU through the third power line Le3. The next battery BAT may be charged.

In the fuel cell vehicle 1, the secondary battery BAT is used as a storage battery for storing electric power for driving the driving motor MOT. For example, when the fuel cell vehicle 1 requires a larger amount of electric power than during normal running such as when starting / accelerating, the secondary battery BAT discharges the electric power to the control unit PCU through the third power line Le3, and the control unit PCU receives the electric power. The DC power generated by the fuel cell FC and the power discharged from the secondary battery BAT can be superimposed and converted into three-phase AC power, which can be supplied to the drive electric motor MOT through the first power line Le1. Further, for example, when the fuel cell FC does not generate electricity, or when the fuel cell FC cannot generate electricity, such as when the fuel cell FC is started or fails, or when the fuel cell is depleted of hydrogen, the fuel cell The power required for traveling of the vehicle 1 is discharged from the secondary battery BAT to the control unit PCU through the third power line Le3, converted into three-phase AC power in the control unit PCU, and supplied to the drive electric motor MOT through the first power line Le1. be able to.

The secondary battery BAT is arranged so that at least a part thereof overlaps with the first hydrogen tank TNK1 in the front-rear direction. Therefore, the secondary battery BAT is protected by the left and right first hydrogen tanks TNK1 and the pair of left and right side members 2 even when the fuel cell vehicle 1 collides sideways. As a result, when the fuel cell vehicle 1 collides sideways, the risk of damage to the secondary battery BAT and leakage of high-voltage power can be reduced.

Regarding the charging method of the secondary battery BAT, in addition to the method of charging the DC power generated by the fuel cell FC described above, the charging inlet (not shown) capable of receiving the power from the external power source to the fuel cell vehicle 1. , And a method of providing a power line (not shown) for electrically connecting the charging inlet and the secondary battery BAT or the control unit PCU and charging the power from the external power source via the charging inlet may be possible. ..

Further, the drive motor MOT can function as a generator for generating regenerative power of three-phase alternating current when the fuel cell vehicle 1 is braked. The three-phase AC regenerated power generated by the drive motor MOT flows to the control unit PCU through the first power line Le1, is converted to DC power by the control unit PCU, and charges the secondary battery BAT through the third power line Le3. Will be done.

[Hydrogen leakage prevention measures for fuel cell vehicles]
Next, measures to prevent hydrogen leakage in the fuel cell vehicle 1 will be described with reference to FIGS. 2 and 3.

When a hydrogen leak occurs in the fuel cell vehicle 1, the secondary battery BAT, the drive motor MOT, the control unit PCU, and the power line Le can become an ignition point when they come into contact with the leaked hydrogen. Therefore, it is preferable that the secondary battery BAT, the drive motor MOT, the control unit PCU, and the power line Le are arranged so as not to come into contact with the leaked hydrogen when a hydrogen leak occurs in the fuel cell vehicle 1.

As shown in FIG. 2, the first hydrogen pipe L1 and the second hydrogen pipe L2 are arranged above the power line Le in a side view. Therefore, when a hydrogen leak occurs in the first hydrogen pipe L1 and / or the second hydrogen pipe L2, the hydrogen leaked from the first hydrogen pipe L1 and / or the second hydrogen pipe L2 diffuses upward, so that the first hydrogen leaks. It is possible to prevent hydrogen leaking from the hydrogen pipe L1 and / or the second hydrogen pipe L2 from coming into contact with the power line Le. As a result, even if a hydrogen leak occurs in the first hydrogen pipe L1 and / or the second hydrogen pipe L2, the hydrogen leaked from the first hydrogen pipe L1 and / or the second hydrogen pipe L2 comes into contact with the power line Le. It can prevent ignition.

Further, as described above, the heat-operated overpressure prevention safety device TPRD provided in each first hydrogen pipe L1 and each second hydrogen pipe L2 is arranged between the cabin 4 and the loading platform 5 in the front-rear direction. Has been done.

Therefore, even when the heat-operated overpressure prevention safety device TPRD is activated and hydrogen is released from the first hydrogen tank TNK1 and / or the second hydrogen tank TNK2, the released hydrogen is indicated by the arrow A in FIG. As shown, it passes between the passenger compartment 4 and the loading platform 5 and is discharged into the atmosphere above the fuel cell vehicle 1. As a result, the heat-operated overpressure prevention safety device TPRD is activated, and the hydrogen released from the first hydrogen tank TNK1 and / or the second hydrogen tank TNK2 stays below the accommodation space 7 and the loading platform 5. Can be prevented.

As shown in FIG. 3, the tank fixing member 10 that supports the first hydrogen tank TNK1 and is fixed to each of the pair of left and right side members 2 is arranged outside the side member 2 in the vehicle width direction, and is the first hydrogen tank. A tank support member 20 that supports the TNK 1 and a bracket 30 that fixes the tank support member 20 to the side member 2 are provided.

The tank fixing member 10 that supports the first hydrogen tank TNK1 on the left side and the tank fixing member 10 that supports the first hydrogen tank TNK1 on the right side have a symmetrical configuration. In the present specification, the configuration of the tank fixing member 10 that supports the first hydrogen tank TNK1 on the left side will be described in detail, and the detailed description of the configuration of the tank fixing member 10 that supports the first hydrogen tank TNK1 on the right side will be omitted. do.

In the present embodiment, the tank support member 20 is a storage case that supports and houses the first hydrogen tank TNK1.

The tank support member 20 has an upper surface 21 extending above the first hydrogen tank TNK1 in the vehicle width direction, a lower surface 22 extending below the first hydrogen tank TNK1 in the vehicle width direction, and a first hydrogen tank TNK1. It has an outer side surface 23 extending in the vertical direction on the outer side in the vehicle width direction, and an inner side surface 24 extending in the vertical direction on the inner side in the vehicle width direction of the first hydrogen tank TNK1.

The tank support member 20 is located inside the vehicle width direction of the upper surface 21 in the front view, above the center in the vertical direction of the first hydrogen tank TNK1 and inside the vehicle width direction of the first hydrogen tank TNK1 in the vehicle width direction. It further has an inclined surface 25 that inclines downward from the end toward the inside in the vehicle width direction and extends to the upper end of the inner side surface 24.

The bracket 30 includes a side surface portion 31 extending in the vertical direction and a bottom surface portion 32 extending outward in the vehicle width direction from the lower end of the side surface portion 31 in a front view, and has a substantially L-shape.

The bracket 30 is fixed to the side member 2 with the side surface portion 31 in contact with the outer side surface 2a of the side member 2 in the vehicle width direction. The lower end of the side surface portion 31 is not in contact with the side member 2, and the side surface portion 31 extends downward from the side member 2.

The lower surface 22 of the tank support member 20 is in contact with the bottom surface portion 32 of the bracket 30, and the tank support member 20 is placed and fixed.

In this way, the tank support member 20 that supports the first hydrogen tank TNK1 is fixed to the side member 2 by the bracket 30.

When viewed from the front, above the center of the first hydrogen tank TNK1 in the vertical direction and inside the vehicle width direction of the first hydrogen tank TNK1 in the vehicle width direction, between the tank support member 20 and the side member 2. , A space portion 11 extending in the vehicle width direction surrounded by the inclined surface 25 of the tank support member 20 and the side member 2 is formed.

The second hydrogen pipe L2 is arranged in the space portion 11 surrounded by the inclined surface 25 of the tank support member 20 and the side member 2 in the region overlapping with the tank fixing member 10 in the front-rear direction.

Therefore, the second hydrogen pipe L2 is above the center in the vertical direction of the first hydrogen tank TNK1 and from the upper end portion of the first hydrogen tank TNK1 in the front view in the region overlapping with the first hydrogen tank TNK1 in the front-rear direction. It is located below, outside the vehicle width direction from the side member 2, and inside the vehicle width direction from the center of the first hydrogen tank TNK1 in the vehicle width direction.

Therefore, even if the fuel cell vehicle 1 collides sideways, the second hydrogen pipe L2 is protected by the first hydrogen tank TNK1. As a result, when the fuel cell vehicle 1 collides sideways, the second hydrogen tank L2 is damaged and the risk of hydrogen leaking out is reduced, and the second hydrogen tank is arranged outside the side member 2 in the vehicle width direction. Since the second hydrogen pipe L2 connected to the side member 2 can be arranged outside the vehicle width direction, the length of the second hydrogen pipe L2 can be shortened, and there is a risk that the second hydrogen pipe L2 will be damaged and hydrogen will leak out. It can be further reduced. In this way, the fuel cell vehicle 1 is improved in safety against hydrogen leakage.

Further, the second hydrogen pipe L2 has the tank support member 20 and the side member 2 above the center of the first hydrogen tank TNK1 in the vertical direction and inside the vehicle width direction of the first hydrogen tank TNK1 in the vehicle width direction. Since it is arranged in the space 11 formed between the two, the second hydrogen pipe L2 is protected by the tank support member in addition to the first hydrogen tank TNK1 when the fuel cell vehicle 1 collides sideways. To. This makes it possible to further reduce the risk of damage to the second hydrogen pipe L2 when the fuel cell vehicle 1 collides sideways.

Further, since the space portion 11 is a space surrounded by the side member 2 and the inclined surface 25 that inclines downward toward the inside in the vehicle width direction of the tank support member 20, the fuel cell vehicle 1 collides sideways. Then, when the first hydrogen tank TNK1 and the tank support member 20 are displaced inward in the vehicle width direction, the second hydrogen pipe L2 is a tank support that is displaced inward in the vehicle width direction as shown by arrow D in FIG. It moves relative to the member 20 so as to slide the inclined surface 25. Therefore, even when the fuel cell vehicle 1 collides sideways and the first hydrogen tank TNK1 and the tank support member 20 are displaced inward in the vehicle width direction, the second hydrogen pipe L2 still has the first hydrogen tank TNK1 and the tank support member 20. Displacement and deformation are suppressed without being interfered with by. This makes it possible to further reduce the risk of damage to the second hydrogen pipe L2 when the fuel cell vehicle 1 collides sideways.

The bracket 30 has a buckling portion 33 that plastically deforms when the fuel cell vehicle 1 collides sideways and the tank fixing member 10 receives an impact load from the outside in the vehicle width direction indicated by the arrow B in FIG. .. The buckling portion 33 is formed at the lower end portion of the side surface portion 31 of the bracket 30 where the side member 2 comes into contact with the outer side surface 2a in the vehicle width direction. When the fuel cell vehicle 1 collides sideways and the tank fixing member 10 receives an impact load from the outside in the vehicle width direction indicated by the arrow B in FIG. 3, the bracket 30 is a portion below the buckling portion 33 of the bracket 30. However, as shown by the arrow C in FIG. 3, the buckling portion 33 is used as a fulcrum and is deformed so as to be displaced downward in a downwardly convex arc shape toward the inside in the vehicle width direction.

Therefore, when the fuel cell vehicle 1 collides sideways and the tank fixing member 10 receives an impact load from the outside in the vehicle width direction, the buckling portion 33 of the bracket 30 functions as an impact absorbing portion that absorbs the impact load. , It is possible to suppress the deformation of the tank support member 20. As a result, when the fuel cell vehicle 1 collides sideways and the tank fixing member 10 receives an impact load from the outside in the vehicle width direction, the risk of damaging the first hydrogen tank TNK1 supported by the tank support member 20 is reduced. can.

Further, when the fuel cell vehicle 1 collides sideways and the tank fixing member 10 receives an impact load from the outside in the vehicle width direction indicated by the arrow B in FIG. 3, the buckling portion 33 undergoes an impact due to plastic deformation. Since the load is absorbed, it is not necessary to provide the bracket 30 with an impact absorbing portion of another member, and the impact load from the outside in the vehicle width direction can be absorbed without increasing the size and complexity of the bracket 30.

When the fuel cell vehicle 1 collides sideways and the tank fixing member 10 receives an impact load from the outside in the vehicle width direction indicated by the arrow B in FIG. 3, the buckling portion 33 is plastically deformed and the seat of the bracket 30 is seated. The portion below the bending portion 33 is displaced downward in a downwardly convex arc shape with the buckling portion 33 as a fulcrum as shown by the arrow C in FIG. 3 in the front view. The portion of the bracket 30 below the buckling portion 33 is displaced downward in the vehicle width direction in an arc shape with the buckling portion 33 as a fulcrum, as shown by an arrow C in FIG. 3 in front view. As a result, the tank support member 20 and the first hydrogen tank TNK1 supported by the tank support member 20 are also displaced downward in a downwardly convex arc shape with the buckling portion 33 as a fulcrum. .. When the first hydrogen tank TNK1 is displaced downward in a downwardly convex arc shape with the buckling portion 33 as a fulcrum, the filling / discharging hole 8 provided at the tank front end portion of the first hydrogen tank TNK1 is seated. With the bent portion 33 as a fulcrum, the displacement locus E shown in FIG. 3 is drawn by displacing in a downwardly convex arc shape toward the inside in the vehicle width direction.

The first hydrogen pipe L1 connects the displacement locus E, the first virtual straight line VL1 connecting one end of the displacement locus E and the buckling portion 33, and the other end of the displacement locus E and the buckling portion 33 in front view. It is arranged in the area Z surrounded by the second virtual straight line VL2.

By arranging the first hydrogen pipe L1 in the region Z in front view, the tank fixing member 10 receives an impact load from the outside in the vehicle width direction indicated by the arrow B in FIG. 3, and the buckling portion 33 of the bracket 30 receives the impact load. Even when the first hydrogen tank TNK1 is displaced due to plastic deformation, the displacement amount and the deformation amount of the first hydrogen pipe L1 connected to the filling / discharging hole 8 of the first hydrogen tank TNK1 can be reduced. As a result, when the fuel cell vehicle 1 collides sideways and the tank fixing member 10 receives an impact load from the outside in the vehicle width direction, the risk of damaging the first hydrogen pipe L1 can be reduced.

(Modification example)
In the above-described embodiment, the bracket 30 includes a side surface portion 31 extending in the vertical direction and a bottom surface portion 32 extending outward in the vehicle width direction from the lower end of the side surface portion 31 in a front view, and has a substantially L-shape. However, the bracket 30 does not have to have a substantially L-shape including the side surface portion 31 and the bottom surface portion 32.

As shown in FIG. 4, in the modified example, the bracket 30 has a shape that abuts on the upper surface 2b of the side member 2, is fixed to the side member 2, and extends in the vehicle width direction. The outer end portion of the bracket 30 in the vehicle width direction is not in contact with the side member 2, and the bracket 30 extends outward in the vehicle width direction from the side member 2. The upper surface 21 of the tank support member 20 is in contact with the bracket 30, and the tank support member 20 is fixed.

In this modification, the buckling portion 33 is formed at the outer end portion in the vehicle width direction of the contact portion of the bracket 30 with the upper surface 2b of the side member 2. When the fuel cell vehicle 1 collides sideways and the tank fixing member 10 receives an impact load from the outside in the vehicle width direction indicated by the arrow B in FIG. 3, the bracket 30 has a vehicle width wider than the buckling portion 33 of the bracket 30. As shown by the arrow C in FIG. 3, the outer portion in the direction is deformed so as to be displaced downward in a downwardly convex arc shape with the buckling portion 33 as a fulcrum toward the inside in the vehicle width direction.

Although one embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such embodiments. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, which naturally belong to the technical scope of the present invention. Understood. Further, each component in the above embodiment may be arbitrarily combined as long as the gist of the invention is not deviated.

For example, in the present embodiment, a fuel cell vehicle has been described as an example of the fuel cell mounting system of the present invention, but the fuel cell mounting system of the present invention is not limited to the fuel cell vehicle, for example, a stationary fuel cell mounting system. It may be a system.

Further, for example, the number of fuel cell FCs mounted on the fuel cell vehicle 1 is not limited to two. The number of fuel cell FCs mounted on the fuel cell vehicle 1 may be one, or may be three or more depending on the required power generation.

Further, for example, the number of hydrogen tanks mounted on the fuel cell vehicle 1 and the arrangement location thereof are not limited to the above embodiment. The fuel cell vehicle 1 may be further equipped with a separate hydrogen tank in addition to the first hydrogen tank TNK1 and the second hydrogen tank TNK2, depending on the required amount of hydrogen, the weight balance with other members, and the like. ..

Further, for example, the second hydrogen tank TNK2 may not be arranged behind the rear front wheel RW1 and the rear rear wheel RW2. The second hydrogen tank TNK2 may be arranged in front of the rear front wheel RW1 and the rear rear wheel RW2, or may be arranged between the rear front wheel RW1 and the rear wheel RW2 in the front-rear direction.

Further, for example, the tank support member 20 is not limited to a storage case that supports and houses the first hydrogen tank TNK1. The tank support member 20 may be, for example, a frame frame body having four frame members extending in the front-rear direction extending from the upper left portion, the lower left portion, the upper right portion, and the lower right portion of the first hydrogen tank TNK1.

Further, for example, in the present embodiment, when the tank fixing member 10 receives an impact load from the outside in the vehicle width direction, the buckling portion 33 of the bracket 30 functions as an impact absorbing portion that absorbs the impact load. However, the impact absorbing portion that absorbs the impact load when the tank fixing member 10 receives the impact load from the outside in the vehicle width direction may be a member separate from the buckling portion 33 of the bracket 30.

At least the following items are described in the present specification. The components and the like corresponding to the above-described embodiments are shown in parentheses as an example, but the present invention is not limited thereto.

(1) A pair of side members extending in the first direction (front-back direction) perpendicular to the vertical direction and facing each other in the second direction (horizontal direction) perpendicular to both the vertical direction and the first direction. It has a frame structure with (side member 2) and has a frame structure.
Fuel cell (fuel cell FC) and
A first hydrogen tank (first hydrogen tank TNK1) filled with hydrogen by compression,
A second hydrogen tank (second hydrogen tank TNK2) filled with hydrogen by compression,
A first hydrogen pipe (first hydrogen pipe L1) connecting the fuel cell and the first hydrogen tank,
A fuel cell-mounted system (fuel cell vehicle 1) comprising a second hydrogen pipe (second hydrogen pipe L2) connecting the fuel cell and the second hydrogen tank.
The first hydrogen tank and the second hydrogen tank are arranged outside the second direction with respect to the pair of side members.
The second hydrogen pipe is above the center in the vertical direction of the first hydrogen tank and above the center of the first hydrogen tank in the region overlapping with the first hydrogen tank in the first direction, and is the first hydrogen tank. It is located below the upper end portion of the above, outside the second direction from the pair of side members, and inside the second direction from the center of the second direction of the first hydrogen tank. Fuel cell mounted system.

According to (1), the second hydrogen pipe is above the center in the vertical direction of the first hydrogen tank and the first hydrogen in the region overlapping with the first hydrogen tank in the first direction when viewed from the first direction. Since it is located below the upper end of the tank, outside the pair of side members in the second direction, and inside the second direction of the center of the first hydrogen tank in the second direction, it is mounted on a fuel cell. The second hydrogen pipe is protected by the first hydrogen tank even if the system is impacted from the outside in the second direction. As a result, when the fuel cell mounting system is impacted from the outside in the second direction, the second hydrogen pipe is placed outside the second direction from the side member while reducing the risk of damaging the second hydrogen pipe and leaking hydrogen. Since the second hydrogen pipe connected to the second hydrogen tank can be arranged outside the side member in the second direction, the length of the second hydrogen pipe can be shortened, and the second hydrogen pipe is damaged and hydrogen leaks. The risk of getting out can be further reduced. In this way, the fuel cell-mounted system is improved in safety against hydrogen leakage.

(2) The fuel cell-equipped system according to (1).
A tank fixing member (tank fixing member 10) that supports the first hydrogen tank and is fixed to at least one of the pair of side members is further provided.
The tank fixing member is arranged outside the side member in the second direction, and fixes the tank support member (tank support member 20) that supports the first hydrogen tank and the tank support member to the side member. With a bracket (bracket 30)
When viewed from the first direction, the tank support member is located above the center of the first hydrogen tank in the vertical direction and inside the second direction of the center of the first hydrogen tank in the second direction. A space portion (space portion 11) extending in the second direction is formed between the side member and the side member.
The second hydrogen pipe is a fuel cell mounting system arranged in the space in a region overlapping the tank fixing member in the first direction.

According to (2), the second hydrogen pipe is a tank support member above the center of the first hydrogen tank in the vertical direction and inside the second direction of the center of the first hydrogen tank in the second direction. Since it is located in the space formed between the side members, the second hydrogen pipe is a tank in addition to the first hydrogen tank when the fuel cell mounting system is impacted from the outside in the second direction. It is also protected by the support member. This makes it possible to further reduce the risk of damage to the second hydrogen pipe when the fuel cell mounting system is impacted from the outside in the second direction.

(3) The fuel cell-equipped system according to (2).
The tank support member is located above the center of the first hydrogen tank in the vertical direction and inside the second direction of the center of the first hydrogen tank in the second direction when viewed from the first direction. , Has an inclined surface (inclined surface 25) that inclines downward toward the inside in the second direction.
The space portion is a space surrounded by the side member and the inclined surface, which is a fuel cell mounting system.

According to (3), the space portion is a space surrounded by a side member and an inclined surface that inclines downward toward the inside in the second direction of the tank support member, so that the fuel cell mounting system can be used. When the first hydrogen tank and the tank support member are displaced inward in the second direction due to an impact from the outside in the second direction, the second hydrogen pipe is inclined with respect to the tank support member displaced inward in the second direction. Relative movement to slide the surface. Therefore, even if the fuel cell mounting system is impacted from the outside in the second direction and the first hydrogen tank and the tank support member are displaced inward in the second direction, the second hydrogen pipe still supports the first hydrogen tank and the tank. It does not receive interference from the member and is prevented from being displaced and deformed. This makes it possible to further reduce the risk of damage to the second hydrogen pipe when the fuel cell mounting system is impacted from the outside in the second direction.

(4) The fuel cell-equipped system according to (2) or (3).
The bracket is a fuel cell mounting system having a shock absorbing portion (buckling portion 33) that absorbs a shock load from the outside in the vehicle width direction.

According to (4), when the fuel cell mounting system receives an impact from the outside in the second direction and the tank fixing member receives the impact load from the outside in the second direction, the impact absorbing portion of the bracket receives the impact load. Since it functions as an absorber, it is possible to prevent the tank support member from being deformed. As a result, when the fuel cell mounting system receives an impact from the outside in the second direction and the tank fixing member receives an impact load from the outside in the second direction, the first hydrogen tank supported by the tank support member is damaged. The risk of fuel cells can be reduced.

(5) The fuel cell-equipped system according to (4).
The shock absorbing portion is a buckling portion that is deformed to absorb an impact load when an impact is received from the outside in the second direction, and is a fuel cell mounting system.

According to (5), since the shock absorbing portion is a buckling portion that deforms and absorbs the impact load when receiving an impact from the outside in the second direction, a shock absorbing portion of another member is provided on the bracket. It is not necessary, and the impact load from the outside in the second direction can be absorbed without increasing the size and complexity of the bracket.

(6) The fuel cell-equipped system according to (5).
The first hydrogen tank is provided with a filling / discharging hole (filling / discharging hole 8) for filling and discharging hydrogen at at least one of one end and the other end in the first direction.
The first hydrogen pipe has a displacement locus (displacement locus) in which the filling / discharging hole is displaced when the shock absorbing portion is deformed by receiving an impact load from the outside in the second direction when viewed from the first direction. E), a first virtual straight line (first virtual straight line VL1) connecting one end of the displacement locus and the shock absorbing portion, and a second virtual straight line (first virtual straight line VL1) connecting the other end of the displacement locus and the shock absorbing portion. A fuel cell-mounted system arranged in an area (area Z) surrounded by two virtual straight lines VL2).

According to (6), the first hydrogen pipe has a displacement locus in which the filling / discharging hole is displaced when the shock absorbing portion is deformed by receiving an impact load from the outside in the second direction when viewed from the first direction. , Since it is arranged in the area surrounded by the first virtual straight line connecting one end of the displacement locus and the shock absorbing portion and the second virtual straight line connecting the other end of the displacement locus and the shock absorbing portion, the second direction. Even if the tank fixing member receives an impact load from the outside of the tank and the impact absorbing part is deformed and the first hydrogen tank is displaced, the displacement amount and deformation of the first hydrogen pipe connected to the filling / discharging hole of the first hydrogen tank. The amount can be reduced. As a result, when the fuel cell mounting system receives an impact from the outside in the second direction and the tank fixing member receives an impact load from the outside in the second direction, the risk of damaging the first hydrogen pipe can be reduced.

(7) The fuel cell-mounted system according to any one of (1) to (6).
The second hydrogen tank is
The projected area in the first direction is smaller than that of the first hydrogen tank.
A fuel cell-mounted system arranged at a position hidden in the first hydrogen tank when viewed from one side in the first direction.

According to (7), the second hydrogen tank has a projected area smaller than that of the first hydrogen tank in the first direction, and is arranged at a position hidden by the first hydrogen tank when viewed from one side of the first direction. Therefore, when the fuel cell-mounted system is movable, the air resistance generated by the second hydrogen tank can be reduced when the fuel cell-mounted system is moved.

(8) The fuel cell-mounted system according to any one of (1) to (7).
Secondary battery (secondary battery BAT) and
Motor (motor for driving MOT) and
The fuel cell, the secondary battery, and a power line (power line Le) for electrically connecting the electric motor are further provided.
The secondary battery, the motor, and the power line are arranged between the pair of side members in the second direction.
The first hydrogen pipe and the second hydrogen pipe are a fuel cell mounting system provided above the power line when viewed from the second direction.

According to (8), since the first hydrogen pipe and the second hydrogen pipe are provided above the power line when viewed from the second direction, hydrogen leaks in the first hydrogen pipe and / or the second hydrogen pipe. When the above occurs, the hydrogen leaked from the 1st hydrogen pipe and / or the 2nd hydrogen pipe diffuses upward, so that the hydrogen leaked from the 1st hydrogen pipe and / or the 2nd hydrogen pipe comes into contact with the power line. Can be prevented. This prevents hydrogen leaking from the first hydrogen pipe and / or the second hydrogen pipe from coming into contact with the power line and igniting even if a hydrogen leak occurs in the first hydrogen pipe and / or the second hydrogen pipe. can.

(9) The fuel cell-equipped system according to (8).
The secondary battery is a fuel cell-mounted system in which at least a part thereof is arranged so as to overlap with the first hydrogen tank in the first direction.

According to (9), since the secondary battery is arranged so that at least a part thereof overlaps with the first hydrogen tank in the first direction, the fuel cell mounting system of the secondary battery is arranged from the outside in the second direction. Even if it receives an impact, it is protected by the first hydrogen tank and the side member. As a result, when the fuel cell-mounted system is impacted from the outside in the second direction, the risk of damage to the secondary battery and leakage of high-voltage power can be reduced.

1 Fuel cell vehicle (fuel cell-equipped system)
2 Side member 8 Filling and discharging hole 10 Tank fixing member 11 Space part 20 Tank support member 25 Inclined surface 30 Bracket 33 Buckling part (shock absorbing part)
FC fuel cell BAT secondary battery MOT drive motor (motor)
TNK1 1st hydrogen tank TNK2 2nd hydrogen tank L1 1st hydrogen pipe L2 2nd hydrogen pipe Le Power line E Displacement locus VL1 1st virtual straight line VL2 2nd virtual straight line Z region

Claims (9)

It has a frame structure extending in a first direction perpendicular to the vertical direction and having a pair of side members facing each other in the second direction perpendicular to both the vertical direction and the first direction.
With a fuel cell
The first hydrogen tank filled with hydrogen and
A second hydrogen tank filled with hydrogen and
A first hydrogen pipe connecting the fuel cell and the first hydrogen tank,
A fuel cell-mounted system including a second hydrogen pipe connecting the fuel cell and the second hydrogen tank.
The first hydrogen tank is arranged between the fuel cell and the second hydrogen tank in the first direction.
The first hydrogen tank and the second hydrogen tank are arranged outside the second direction with respect to the pair of side members.
The second hydrogen pipe is above the center in the vertical direction of the first hydrogen tank and above the center of the first hydrogen tank in the region overlapping with the first hydrogen tank in the first direction, and is the first hydrogen tank. It is located below the upper end portion of the above, outside the second direction from the pair of side members, and inside the second direction from the center of the second direction of the first hydrogen tank. Fuel cell mounted system. The fuel cell-mounted system according to claim 1.
Further provided with a tank fixing member that supports the first hydrogen tank and is fixed to at least one of the pair of side members.
The tank fixing member is arranged outside the side member in the second direction, and includes a tank support member that supports the first hydrogen tank and a bracket that fixes the tank support member to the side member. ,
When viewed from the first direction, the tank support member is located above the center of the first hydrogen tank in the vertical direction and inside the second direction of the center of the first hydrogen tank in the second direction. A space portion extending in the second direction is formed between the side member and the side member.
The second hydrogen pipe is a fuel cell mounting system arranged in the space in a region overlapping the tank fixing member in the first direction. The fuel cell-mounted system according to claim 2.
The tank support member is located above the center of the first hydrogen tank in the vertical direction and inside the second direction of the center of the first hydrogen tank in the second direction when viewed from the first direction. , Has an inclined surface that inclines downward toward the inside in the second direction.
The space portion is a space surrounded by the side member and the inclined surface, which is a fuel cell mounting system. The fuel cell-mounted system according to claim 2 or 3.
The bracket is a fuel cell mounting system having a shock absorbing portion that absorbs a shock load from the outside in the second direction. The fuel cell-mounted system according to claim 4.
The shock absorbing portion is a buckling portion that is deformed to absorb an impact load when an impact is received from the outside in the second direction, and is a fuel cell mounting system. The fuel cell-mounted system according to claim 5.
The first hydrogen tank is provided with a filling / discharging hole for filling and discharging hydrogen at at least one of one end and the other end in the first direction.
The first hydrogen pipe has a displacement locus in which the filling / discharging hole is displaced when the shock absorbing portion is deformed by receiving an impact load from the outside in the second direction when viewed from the first direction. A fuel cell arranged in a region surrounded by a first virtual straight line connecting one end of a displacement locus and the shock absorbing portion and a second virtual straight line connecting the other end of the displacement locus and the shock absorbing portion. Onboard system. The fuel cell-mounted system according to any one of claims 1 to 6.
The second hydrogen tank is
The projected area in the first direction is smaller than that of the first hydrogen tank.
A fuel cell-mounted system arranged at a position hidden in the first hydrogen tank when viewed from one side in the first direction. The fuel cell-mounted system according to any one of claims 1 to 7.
With a secondary battery,
With an electric motor
The fuel cell, the secondary battery, and the power line for electrically connecting the electric motor are further provided.
The secondary battery, the motor, and the power line are arranged between the pair of side members in the second direction.
The first hydrogen pipe and the second hydrogen pipe are a fuel cell mounting system provided above the power line when viewed from the second direction. The fuel cell-mounted system according to claim 8.
The secondary battery is a fuel cell-mounted system in which at least a part thereof is arranged so as to overlap with the first hydrogen tank in the first direction.

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