JP2006131146A - Fuel cell automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce noise to a weak electric signal by an electric wire for strong electricity connected to power branching device and power converting/regulating device from a fuel cell. <P>SOLUTION: Each of various kinds of auxiliary machineries 5, the fuel cell 7, the power branching device 9 and the power converting/regulating device 11 is mounted in the order from a vehicle front side on a sub-frame 3 in a space under the floor of a vehicle. A harness 17 for strong electricity is wired to the power branching device 9 and the power converting/regulating device 11 from a rear end on a vehicle width direction right side of the fuel cell 7. Harnesses 23, 25 and 27 for weak electricity connected to each of the auxiliary machineries 5, the fuel cell 7 and the power branching device 9 are wired on the vehicle width direction left side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fuel cell vehicle in which a fuel cell that generates power by a reaction between a fuel gas and an oxidizing gas is mounted under the floor of the vehicle.

  Conventionally, electric power that adjusts the power supply state to parts such as fuel cells, various auxiliary equipment necessary for power generation of fuel cells, and drive motors that operate by receiving power generated by fuel cells under the floor of a vehicle In a fuel cell vehicle equipped with a supply adjustment device or the like, for example, as described in Patent Document 1 below, a power supply adjustment device, a storage battery, a fuel cell and various auxiliary machines, a fuel tank, Arranged in order.

  In the above-mentioned Patent Document 1, each device is arranged under the floor in order to secure a space in the vehicle interior, and further, depending on the mounting position of each device in the vehicle front-rear direction, the electrical wiring between the fuel cell and the storage battery, the fuel cell, The piping between the auxiliary machinery and the piping between the fuel cell and the fuel tank are not complicated.

  Further, in Patent Document 2 below, a fuel cell is set at the center under the vehicle floor, auxiliary equipments at the front and rear of the fuel cell, and whether to allow or remove power from the fuel cell at the upper part of the fuel cell is set. There has been proposed a fuel cell output blocking means for disposing.

In the above-mentioned Patent Document 2, since the fuel cell is arranged in the center of the vehicle, the weight balance of the entire vehicle is good, and the fuel cell and the fuel cell output shut-off means, the fuel cell and each auxiliary machine are adjacent to each other. Since they are arranged, these electric wiring and piping can be shortened.
JP 2004-127747 A JP 2003-182379 A

  However, in Patent Document 1, there is no description of the arrangement of a power take-out availability control device (corresponding to the fuel cell output shut-off means in Patent Document 2) that controls whether power can be taken out from the fuel cell, and depending on the mounting position, There is a risk that noise will be given to the weak power signal flowing in the weak power cable connected to the auxiliary equipment, due to the power take-out control device from the fuel cell and the high power wire connected from the power take-out control device to the power supply adjustment device. .

  On the other hand, in Patent Document 2, the fuel cell output shut-off means is arranged at a location away from the auxiliary devices above the fuel cell, but there is no description of the power supply adjustment device, and depending on the mounting position, the fuel cell There is a possibility that noise may be given to the weak electric signal flowing in the weak electric wire connected to the auxiliary equipment by the high electric wire connected from the output cutoff means to the power supply adjusting device.

  In view of the above, an object of the present invention is to reduce noise to a weak power signal caused by a high power cable connected to a power supply availability control device and a power supply adjustment device.

  The present invention includes a fuel cell that generates electric power by a reaction between a fuel gas and an oxidizing gas, a power supply adjusting device that adjusts power supply to an operating device that operates by receiving supply of electric power generated by the fuel cell, and the fuel A fuel cell vehicle in which a power takeout availability control device that controls whether or not to take out power generated in a battery and auxiliary equipment necessary for power generation of the fuel cell are mounted under the floor of a vehicle, wherein the fuel cell is The main feature is that the power supply adjusting device, the power take-out availability control device, and the auxiliary devices are arranged.

  According to the present invention, the fuel cell is disposed between the auxiliary devices, the power supply adjusting device, and the power takeout availability control device, so that the fuel cell is connected to the power takeout availability control device and the power supply regulation device. Since the high power cables can be routed away from the weak power cables connected to the auxiliary machinery, it is possible to reduce the mixing of noise from the high power cables into the weak power signals.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view showing a layout of a fuel cell system in a fuel cell vehicle according to a first embodiment of the present invention. The vehicle body side frames 1 are provided on both sides in the vehicle width direction under the vehicle floor, and the subframe 3 is fixed between the vehicle body side frames 1.

  The fuel cell vehicle described above is arranged in the sub-frame 3 in the space under the floor of the vehicle in order from the vehicle front side indicated by arrow FR in FIG. The power branching device 9 and the power conversion adjusting device 11 as a power supply adjusting device are mounted. A fuel tank 13 is arranged behind the vehicle in the underfloor space where these devices are arranged.

  The power branching device 9 controls whether or not the power generated in the fuel cell 7 can be taken out, and sets whether or not the power can be taken out from the fuel cell 7. Further, the power conversion adjusting device 11 converts and adjusts power to components such as an electric motor (not shown) that operates by receiving power supplied from the fuel cell 7.

  The various auxiliary machines 5 include a fuel supply device that supplies the fuel gas introduced from the fuel tank 13 to the fuel cell 7, and a fuel cell that humidifies the oxidizing gas introduced from the engine room located in front of the vehicle in the space under the floor. A humidifier supplied to 5, a temperature control device for the fuel cell 7 and other auxiliary machines 5, and pipes connected to these devices.

  Between the fuel cell 7 and the auxiliary machinery 5, a pipe connection portion 15 for each fluid made of the above-described fuel gas, oxidizing gas, cooling water, or the like is provided.

  The fuel gas in the fuel tank 13 is introduced into the fuel supply device in the auxiliary machinery 5 through a fuel gas pipe (not shown), and then the pressure and temperature are controlled by the fuel supply device. 7 is supplied. The fuel gas in this case is mainly hydrogen, but it may be a reformed gas such as methanol.

  On the other hand, the oxidizing gas introduced from the engine room is humidified by the humidifying device in the auxiliary machinery 5, and is supplied to the fuel cell 7 through the pipe connection portion 15 described above. The oxidizing gas in this case is mainly air.

  In the fuel cell 7, the electric power generated by the reaction between the fuel gas and the oxidizing gas is guided from the fuel cell 7 to the power branching device 9 and the power conversion adjusting device 11, and the electric motor described above is driven from the power conversion adjusting device 11. By transmitting the generated torque to the axle, a driving force for moving the vehicle is obtained.

  In order to conduct such power, a high-power harness 17 is provided as a high-power wire that is sequentially connected to the power branching device 9 and the power conversion adjusting device 11 from the rear end on the right side in the vehicle width direction of the fuel cell 7. . The lead-out portion of the high-power harness 17 from the power conversion adjustment device 11 is connected to a high-power harness 19 as a high-power wire that is routed in the vehicle longitudinal direction along the vehicle body side frame 1 on the right side in the vehicle width direction.

  The vehicle body front side of the high-voltage harness 19 is connected to, for example, an electric motor (not shown) in the engine room, and the rear side thereof is connected to, for example, a storage battery (not shown).

  On the other hand, a weak electrical harness 21 as a weak electrical wire is routed along the vehicle body side frame 1 on the left side in the vehicle width direction in the longitudinal direction of the vehicle body. In the middle of this weak power harness 21, weak power harnesses 23, 25, and 27 are connected as weak power wires to be connected to the auxiliary devices 5, the fuel cell 7, and the power branch device 9, respectively.

  Here, in the present embodiment, the fuel cell 7 is disposed between the auxiliary machinery 5, the power branching device 9, and the power conversion adjusting device 11 in the subframe 3 in the under-floor space of the vehicle.

  For this reason, the auxiliary machinery 5 and the power branching device 9 and the power conversion adjusting device 11 can be arranged separately from each other, and from the fuel cell 7 to the power branching device 9 and from the power branching device 9 to the power conversion adjusting device 11. Since the high-power harness 17 for transmitting the power generated by the reaction between the fuel gas and the oxidant gas in the fuel cell 7 can be arranged without approaching the low-power harness 23 connected to the various auxiliary machines 5, the low-power harness 17 Noise to the signal can be reduced.

  In addition, since the various auxiliary machines 5 are arranged in front of the fuel cell 7 in the subframe 3, the piping and hoses from the engine room to the humidifier in the auxiliary machine 5 are shortened, the engine room It is possible to shorten the piping and hoses from the reservoir tank to the temperature control device in the auxiliary machinery 5.

  Furthermore, since the space in front of the vehicle of the subframe 3 can be used when installing the various auxiliary machines 5, the workability of connecting pipes and hoses connected to the various auxiliary machines 5 is improved. Further, even when an impact due to a vehicle collision or the like is received from the front, the fuel cell 7 can be protected by the auxiliary machinery 5 in front of the vehicle, and fuel gas can be prevented from leaking from the fuel cell 7.

  Further, since the power branching device 9 and the power conversion adjusting device 11 are arranged at the rear of the fuel cell 7, the high-voltage power connected from the power conversion adjusting device 11 to, for example, a storage battery or an electric motor (not shown) when mounted on the rear floor. The harness 19 can be shortened, which is advantageous in connection workability of the high-voltage harnesses 17 and 19.

  Furthermore, even when an impact is caused by a collision from the rear of the vehicle, the fuel cell 7 can be protected by the power conversion adjustment device 11 at the rear of the vehicle, and fuel gas can be prevented from leaking from the fuel cell 7.

 Further, by arranging the power branching device 9 between the fuel cell 7 and the power conversion adjusting device 11, not only the collision from the vehicle front-rear direction but also the impact from the collision from the side of the vehicle, the rigidity By using the power conversion adjustment device 11 housed in a case with a power, the power branching device 9 having a narrower width in the vehicle width direction than the power conversion adjustment device 11 can be protected. At this time, if the length of the power conversion adjustment device 11 in the vehicle width direction is set longer than the length of the fuel cell 7 in the vehicle width direction, the power conversion adjustment device 11 causes the fuel cell 7 to be protected from an impact caused by a side collision or the like. Can be protected.

  Furthermore, disposing the power branch device 9 between the fuel cell 7 and the power conversion adjustment device 11 leads to effective use of the space on the side surface in the vehicle width direction of the fuel cell 7 and the power conversion adjustment device 11. For example, the free space on the side surface can be used for arrangement of a cooling water pipe (not shown) of the power conversion adjustment device 11, or for arrangement of harnesses from the power conversion adjustment device 11 to an electric motor or storage battery in a rear floor or an engine room. .

  By arranging the cooling water pipes and harnesses using the above-mentioned vacant space on the side surface in the vehicle width direction, the cooling water pipes and harnesses are arranged outside the sub frame 3 through the side of the sub frame 3. This eliminates the necessity of improving the rigidity of the sub-frame 3 and protecting the cooling water piping and harnesses due to impacts such as side collisions.

  Here, in FIG. 1, either the power branching device 9 or the power conversion adjusting device 11 may be installed in front of the vehicle, but the fuel cell 7 to the power branching device 9 and the power branching device 9 to power In consideration of shortening the high-voltage harness 17 routed to the conversion adjustment device 11, it is desirable to arrange the power branch device 9 in front of the vehicle.

  Further, in the power branching device 9 arranged between the fuel cell 7 and the power conversion adjusting device 11, the high power harness 17 from the power branching device 9 to the power conversion adjusting device 11 and the weak power harness 27 connected to the power branching device 9. Are arranged on opposite sides in the vehicle width direction.

  For this reason, it is possible to prevent noise from the high-power harness 17 from being mixed into the low-power signal flowing in the low-power harness 27 for diagnosing whether or not the power generated by the fuel cell 7 is taken out toward the power conversion adjustment device 11. Can do.

  Further, by arranging the high-power harness 17 and the low-power harness 27 connected to the power branching device 9 to the opposite sides in the vehicle width direction, the high-power harness 17 and the low-power harness 27 can be connected to each other even in a limited area under the floor. The high-voltage harness 19 and the low-voltage harness 21 to be connected to each other can be arranged at positions away from each other in the subframe 3.

  For example, when a storage battery, an electric motor or the like is arranged in front of or behind the vehicle, as shown in FIG. 1, the right side of the vehicle in the subframe 3 under the floor is used as a high power harness route, while the left side of the vehicle is used as a low power harness. The high-voltage harnesses 17 and 19 are used as a route and are arranged so that noise is not mixed as much as possible in the low-power signals in the subframe 3.

  In this case, the assembly workability of the high-power harnesses 17 and 19 and the low-power harnesses 21, 23, 25, and 27 in the subframe 3 is also improved. Here, the same effect can be obtained by arranging the high-power harnesses 17 and 19 on the left side of the vehicle and the low-power harnesses 21, 23, 25 and 27 on the right side of the vehicle.

  Furthermore, in this embodiment, the pipe connection part 15 of each fluid between the fuel cell 7 and the various auxiliary machines 5 is the vehicle front of the fuel cell 7. Each fluid is mainly fuel gas, oxidant gas, and cooling water, but other fluids may be included that flow through a pipe connected to the drain port or ventilation port of the fuel cell 7.

  Here, the fuel cell 7 must always be controlled in an optimum state according to the temperature, pressure, etc. of each fluid. Therefore, it is more preferable that the sensors used for the control are arranged immediately before the fluid inlet / outlet of the fuel cell 7. It is desirable to control the battery 7. In addition, if noise due to the high-voltage harnesses 17 and 19 is mixed into the weak electric signals of these sensors, the fuel cell 7 cannot be optimally controlled using the sensors, and the life of the fuel cell 7 may be reduced. There is sex.

  Therefore, as in this embodiment, the pipe connection portion 15 of each fluid to the fuel cell 7 is disposed in front of the fuel cell 7 and the power branching device 9 is disposed in the rear of the fuel cell 7 so that the fuel cell 7 can be arranged in the pipe connection part 15 away from the power branching device 9 while arranging the sensors for control diagnosis immediately before the fluid inlet / outlet of the fuel cell 7, thereby making it possible to optimize the fuel cell 7 using the sensors. It is also possible to reduce noise contamination from the high-voltage harness 17 to the low-power signals of the sensors while being controlled. Since noise can be reduced in the weak electric signal, noise canceling parts installed at these sensor parts are not required, and the cost can be reduced.

  Further, by arranging the pipe connection portion 15 of each fluid to the fuel cell 7 on the side opposite to the power branching device 9, a connection work space in the pipe connection portion 15 can be secured, and workability is improved.

  FIG. 2 is a plan view showing a layout of the fuel cell system in the fuel cell vehicle according to the second embodiment of the present invention.

  In the second embodiment, the auxiliary machines 5 are arranged in front of the fuel cell 7 in the subframe 3 in the under-floor space of the vehicle, and the power branching device 9 and the power conversion adjusting device 11 are arranged behind the fuel cell 7 in the vehicle. In addition, these are arranged in the vehicle width direction so that the power branching device 9 is on the right side in the vehicle width direction and the power conversion adjusting device 11 is on the left side.

  Further, from the rear end on the right side in the vehicle width direction of the fuel cell 7, the high-power harness 17 is sequentially connected to the vicinity of the power conversion adjustment device 11 of the power branching device 9 and to the power conversion adjustment device 11. The lead-out portion of the high-power harness 17 from the power conversion adjusting device 11 is connected to a high-power harness 19 that is routed in the vehicle longitudinal direction along the vehicle body side frame 1 on the left side in the vehicle width direction.

  On the other hand, the low-electricity harness 21 is routed in the longitudinal direction of the vehicle body along the vehicle body side frame 1 on the right side in the vehicle width direction. In the middle of this weak electricity harness 21, weak electricity harnesses 23, 25, 27 connected to the auxiliary machinery 5, the fuel cell 7, and the power branching device 9 are connected.

  The second embodiment having such a configuration can obtain the same effects as those of the first embodiment as described below.

  A high-power harness 17 for transmitting power generated by the reaction of fuel gas and oxidizing gas in the fuel cell 7 from the fuel cell 7 to the power branching device 9 and from the power branching device 9 to the power conversion adjusting device 11 is provided with various auxiliary devices 5 Since the arrangement can be made without approaching the low-power harness 23 connected to the high-power harness 17, noise to the low-power signal by the high-power harness 17 can be reduced.

  In addition, since the low power harness 27 to the power branch device 9 and the high power harness 27 from the power branch device 9 to the power conversion adjustment device 11 are arranged on the opposite side in the vehicle width direction, the power generated by the fuel cell 7 is It is possible to prevent noise from the high-power harness 17 from being mixed into the weak power signal for diagnosing whether or not the power conversion adjustment device 11 is taken out.

  In addition, since the pipe connection portions 15 for the fluids of the auxiliary machinery 5 and the fuel cell 7 are installed on the opposite side of the power branching device 9 and the power conversion adjusting device 11, sensors for control diagnosis of the fuel cell 7 are provided. Can be disposed in the pipe connection portion 15 away from the power branching device 9 while being disposed immediately before the fluid inlet / outlet of the fuel cell 7, thereby enabling the fuel cell 7 to be optimally controlled using the sensors and from the high-voltage harness 17. It is also possible to reduce noise contamination in the weak electric signals of the sensors.

  Further, by arranging the pipe connection portion 15 of each fluid to the fuel cell 7 on the side opposite to the power branching device 9, a connection work space in the pipe connection portion 15 can be secured, and workability is improved.

  FIG. 3 is a plan view showing the layout of the fuel cell system in the fuel cell vehicle according to the third embodiment of the present invention.

  In the third embodiment, in the sub-frame 3 in the underfloor space of the vehicle, various auxiliary machines 5 are arranged on the left side of the vehicle, the fuel cell 7 is arranged in the center of the vehicle, and the power branching device 9 is arranged on the right side of the vehicle. And the power conversion adjustment apparatus 11 is arrange | positioned. The power branching device 9 is behind the power conversion adjusting device 11.

  Further, from the right side in the vehicle width direction on the vehicle rear side of the fuel cell 7, the high-power harness 17 is sequentially connected to the power branching device 9 and the power conversion adjusting device 11. As with the first embodiment, the lead-out portion of the high-power harness 17 from the power conversion adjustment device 11 is connected to the high-power harness 19 that is routed in the vehicle longitudinal direction along the vehicle body side frame 1 on the right side in the vehicle width direction. Connecting.

  On the other hand, the low-electricity harness 21 is routed in the longitudinal direction of the vehicle body along the vehicle body side frame 1 on the left side in the vehicle width direction. In the middle of this weak electricity harness 21, weak electricity harnesses 23, 25, 27 connected to the auxiliary machinery 5, the fuel cell 7, and the power branching device 9 are connected.

  As in the first embodiment, the third embodiment configured as described above includes fuel gas in the fuel cell 7 from the fuel cell 7 to the power branching device 9 and from the power branching device 9 to the power conversion adjusting device 11. The high-power harness 17 that transmits the power generated by the reaction of the oxidant gas can be routed without approaching the low-power signal of the low-power harness 23 connected to the various auxiliary devices 5, so that the noise to the low-power signal by the high-power harness 17 can be reduced. Can be reduced.

  In addition, the low-power harness 27 to the power branching device 9 is routed from the rear of the vehicle, and the high-power harness 17 from the power branching device 9 to the power conversion adjusting device 11 is routed to the front of the vehicle. It is possible to prevent noise from the high-power harness 17 from being mixed into the low-power signal flowing through the low-power harness 27 for diagnosing whether or not to take out the generated power toward the power conversion adjustment device 11.

Moreover, since the piping connection part 15 of each fluid of the auxiliary machinery 5 and the fuel cell 7 is installed on the opposite side to the power branching device 9 and the power conversion adjusting device 11 as in the first embodiment,
Sensors for control diagnosis of the fuel cell 7 can be arranged in the pipe connection part 15 away from the power branching device 9 while being arranged immediately before the fluid inlet / outlet of the fuel cell 7, and thus the fuel cell 7 can be used by utilizing the sensors. It is also possible to reduce noise contamination from the high-voltage harness 17 to the low-power signals of the sensors while optimally controlling the power.

  Further, by arranging the pipe connection portion 15 of each fluid to the fuel cell 7 on the side opposite to the power branching device 9, a connection work space in the pipe connection portion 15 can be secured, and workability is improved.

  Although not shown in the drawings, for example, in the first, second, and third embodiments, the high-voltage harness is also used when the mounting positions of the auxiliary machinery 5, the power branching device 9, and the power conversion adjusting device 11 are reversed. The noise to the weak electric signal by 17 can be reduced.

  In that case, the fuel cell 7 and the auxiliary equipment 5 are connected to the pipe connection portion 15 between the vehicle rear side of the fuel cell 7 and the vehicle front side of the auxiliary equipment 5, so that the fuel cell 7 Including noise in the weak electric signal of the sensors just before the fluid inlet / outlet can be reduced.

  However, in this case, in the third embodiment, the positions of the high-voltage harness 19 on the right side in the vehicle width direction and the low-voltage harness 21 on the left side are reversed so that the subframe 3 can be used even in a limited range under the floor. It is possible to dispose the high-power harness 17 and the low-power harness 27 at positions away from each other in the inside, and noise from the high-power harness 17 to the low-power harness 27 can be reduced.

  Moreover, in each of the second and third embodiments, as in the first embodiment, even when the mounting positions of the power branching device 9 and the power conversion adjusting device 11 are reversed, the low power signal by the high power harness 17 is used. Noise can be reduced.

  In this case, in the second embodiment, by reversing the positions of the high-voltage harness 19 on the left side in the vehicle width direction and the low-voltage harness 21 on the right side in the subframe 3 even in a limited range under the floor. It becomes possible to arrange the high-power harness 17 and the low-power harness 27 at positions away from each other, and the noise mixing from the high-power harness 17 to the low-power harness 27 can be reduced.

  As described above, in the present invention, the power branching device 9 is optimally arranged in the subframe 3 under the floor, so that the noise mixture from the high power harnesses 17 and 19 to the weak power signal can be reduced.

It is a top view which shows the layout of the fuel cell system in the fuel cell vehicle concerning the 1st Embodiment of this invention. It is a top view which shows the layout of the fuel cell system in the fuel cell vehicle concerning the 2nd Embodiment of this invention. It is a top view which shows the layout of the fuel cell system in the fuel cell vehicle concerning the 3rd Embodiment of this invention.

Explanation of symbols

5 Auxiliary equipment 7 Fuel cell 9 Power branching device (Power take-out availability control device)
11 Power conversion adjustment device (power supply adjustment device)
15 Piping connections 17, 19 High-voltage harness (high-voltage electric wire)
21, 23, 25, 27 Light electric harness (light electric wire)

Claims (5)

A fuel cell that generates electricity by a reaction between the fuel gas and the oxidizing gas;
A power supply adjusting device that adjusts power supply to an operating device that operates in response to the supply of power generated by the fuel cell;
A power takeout availability control device for controlling whether or not to take out the power generated in the fuel cell; and
Auxiliary machinery necessary for power generation of the fuel cell,
A fuel cell vehicle mounted under a vehicle floor,
A fuel cell vehicle, wherein the fuel cell is disposed between the power supply adjusting device, the power take-out availability control device, and the auxiliary machinery. The fuel cell vehicle according to claim 1,
A fuel cell vehicle characterized in that the auxiliary machinery is disposed in front of the fuel cell in the vehicle, and the power supply adjusting device and the power takeout availability control device are disposed in the vehicle rear of the fuel cell. The fuel cell vehicle according to claim 1 or 2,
A fuel cell vehicle, wherein the power take-out availability control device is disposed between the fuel cell and the power supply adjustment device. The fuel cell vehicle according to any one of claims 1 to 3,
The electric power take-out control device is connected to a low-power electric wire used for low-voltage power and a high-electric power wire used for high-voltage power, respectively, and the low-electric power wire and high-electric power wire are routed on opposite sides in the vehicle width direction. A fuel cell vehicle characterized by that. The fuel cell vehicle according to any one of claims 1 to 4,
A fuel characterized in that a connecting portion between the auxiliary machinery and the fuel cell in a pipe through which a fluid to be supplied from the auxiliary machinery to the fuel cell flows is opposite to the electric power take-out availability control device. Battery car.

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