JP4736461B2 - Fuel cell vehicle component arrangement structure - Google Patents

Description

  The present invention relates to a component arrangement structure in a component mounting room of a fuel cell vehicle.

In general, in the case of a vehicle equipped with an engine such as a gasoline engine or a diesel engine (referred to here as a “gasoline vehicle” for convenience), when a battery and a fuse box are laid out side by side in the vehicle front-rear direction, they do not interfere with each other at the time of a frontal collision. In general, a sufficient distance is taken between the two. Alternatively, the battery mounting bracket and the fuse box mounting bracket may be integrated so that the distance between the two is not reduced even in the event of a frontal collision. On the other hand, the air duct (the air inlet of the air cleaner in the case of a gasoline vehicle) is usually laid out without much relation to the fuse box or the battery (see, for example, Patent Document 1).
JP 2003-127803 A

  By the way, in a fuel cell vehicle, since the number of electrical parts increases significantly compared with a gasoline vehicle, the number of fuse boxes increases or the size of a fuse box increases accordingly. Further, since the fuel cell unit requires more air intake than a gasoline vehicle, the thickness and length of the air duct are increased to improve sound vibration performance.

  For this reason, if each part is laid out by extending the layout concept in the case of a conventional gasoline vehicle, there is a problem that space efficiency is deteriorated and an extra cost and mass are caused.

  For example, if a sufficient space is secured between the low-power battery and the fuse box to avoid interference between the two parts at the time of a vehicle collision, the other space is sacrificed.

  Further, if both the mounting brackets are integrated in order to avoid interference between the low-power battery and the fuse box, the mounting bracket itself becomes large or has a complicated shape, resulting in an increase in cost and mass.

  In consideration of the above circumstances, the present invention can reduce the distance between the low-power battery and the fuse box while eliminating the problem of interference between the low-power battery and the fuse box at the time of a vehicle collision. It is an object of the present invention to provide a component arrangement structure for a fuel cell vehicle that does not need to be complicated or large.

In the component arrangement structure of the fuel cell vehicle according to the present invention, the low-power battery and the fuse box are disposed adjacent to each other in the component mounting room, and the fuel cell unit is disposed in the space between the low-power battery and the fuse box. A cylindrical air duct for taking in the supplied air is passed as a buffer to prevent interference between the low-power battery and the fuse box at the time of a vehicle collision .

  According to the present invention, since the cylindrical air duct for taking in the supply air to the fuel cell unit is passed through the space between the low-power battery and the fuse box arranged adjacent to each other, the air duct is a vehicle collision. Sometimes it acts as a buffer, preventing the weak battery and the fuse box from directly interfering with each other. Therefore, by interposing an air duct that acts as a buffer, the distance previously provided for safety between the low-power battery and the fuse box can be shortened more than before, and the space in the component mounting room is effectively used. Can be planned. Further, it is not necessary to intentionally integrate the battery and the bracket of the fuse box, and the bracket is not unnecessarily complicated or enlarged, thereby preventing an increase in cost and mass.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings. The present embodiment is an example of a fuel cell vehicle in which a fuel cell system is configured by using as much as possible the body structure of an automobile equipped with a normal gasoline engine.

  FIG. 1 is a plan view of the inside of a component mounting room (motor room) of a fuel cell vehicle according to an embodiment, and FIG. 2 is a cross-sectional view taken along the line II-II in FIG.

  As shown in FIGS. 1 and 2, the component mounting room is provided at the front end of the vehicle body 1 of the fuel cell vehicle, and the low-power battery 2 and the fuse box 3 are disposed on the left side in the component mounting room. ing. An air duct 10 for taking in supply air to a fuel cell unit (not shown) is provided in the component mounting room.

  FIG. 3 shows the positional relationship between the weak battery 2 and the fuse box 3 with the air duct 10 omitted. FIG. 4 shows the positional relationship of the low-power battery 2, the fuse box 3, and the air duct 10 taken out.

  As shown in these drawings, the low-power battery 2 is disposed at the front left end in the component mounting room, and the fuse box 3 is disposed adjacent to the upper rear side of the low-power battery 2. In the component mounting room, an air cleaner 4 is disposed on the lower right side of the low-power battery 2 and the fuse box 3.

  The air duct 10 is detoured to the left at the vehicle front-rear direction position from the vehicle front in the vehicle width direction in the component mounting room so as to introduce the taken air into the air cleaner 4, and at a position above the light battery 2. Bends about 90 degrees toward the rear of the vehicle, passes through the space between the low-power battery 2 and the fuse box 3 diagonally downward and rearward, and then bends about 90 degrees to the right again at the lowermost end, at the connection port of the air cleaner 4 Reached and connected. The air duct 10 is disposed between the positive electrode 2A and the negative electrode 2B of the low-power battery 2. Moreover, since this air duct 10 functions also as a buffer material so that it may mention later, it is formed, for example with resin.

  In this case, as shown in FIG. 4, the air duct 10 extends in an oblique linear shape over a range from the lower side of the fuse box 3 and the rear side of the low-power battery 2 to the front of the fuse box 3 and the upper side of the low-power battery 2. An existing straight line portion 10S is provided, and a cylindrical connection portion 12 having an axis line LA in the left-right direction of the vehicle is provided at the lowermost end portion of the straight line portion 10S located below the fuse box 3. As shown in FIG. 5, the air duct 10 and the air cleaner 4 are connected by fitting the cylindrical connecting portion 12 into a cylindrical connecting portion 4 </ b> A that is an inlet on the air cleaner 4 side.

  Moreover, the attachment of the low-power battery 2 and the fuse box 3 is separate, and the fuse box 3 is fixed to the vehicle body 1 by an exclusive L-shaped mounting bracket 8. As shown in FIG. 6A, the mounting bracket 8 includes a horizontal plate portion 8a for mounting and fixing the fuse box 3, and a vertical plate portion 8b extending vertically downward via a bent portion 8c at the rear end. And is attached to the vehicle body 1 by screwing the vertical plate portion 8b. Accordingly, the fuse box 3 is supported and fixed only at the end portion on the vehicle rear side, and the end portion on the vehicle front side is a free end.

  Moreover, as shown in FIG. 3, the branch line 5A to the fuse box 3 side of the wire harness 5 connected to the fuse box 3 can move freely without stopping at the end from the branch point 6 with a fastener. The actual length of the branch line 5A of the harness from the branch point 6 to the connection point to the fuse box 3 is also set longer than the shortest distance from the branch point 6 to the connection point. By doing in this way, the non-restraining area | region which permits the freedom of the expected displacement of the fuse box 3 at the time of a vehicle collision is provided in the fuse box 3 side of the wire harness 5. FIG. This non-restraining region is a space for arranging the branch line 5A of the wire harness 5 that is sufficiently longer than the actual length when the fuse box 3 is flipped up to the rear upper part of the vehicle at the time of a vehicle collision. Has been.

  In the structure configured as described above, the cylindrical air duct 10 for taking in the supply air to the fuel cell unit passes through the space between the weak battery 2 and the fuse box 3 disposed adjacent to each other. Therefore, the air duct 10 serves as a buffer during a vehicle collision, and can prevent the weak battery 2 and the fuse box 3 from directly interfering with each other.

  Therefore, by interposing the air duct 10 having a buffering action, the distance provided in advance for safety between the low-power battery 2 and the fuse box 3 can be shortened compared to the conventional case, Space can be used effectively. In addition, it is not necessary to intentionally integrate the mounting brackets of the low-power battery 2 and the fuse box 3, and the bracket is not unnecessarily complicated or enlarged, thereby preventing an increase in cost and mass. it can.

  In addition, according to the present embodiment, as shown in FIG. 6A, the state before the collision, the low-power battery 2 is disposed on the front side in the component mounting room, and the fuse box 3 is disposed on the upper side of the rear side. Since the cylindrical connecting portion 12 having the axis line LA in the left-right direction of the vehicle is provided at a position below the fuse box 3 of the air duct 10 passing through the space between the fuse box 2 and the fuse box 3, as shown in FIG. When the low-power battery 2 is pushed and moved rearward by the collision load F and the air duct 10 is pushed at the time of a front vehicle collision, the air duct 10 rotates to the upper side of the vehicle with the cylindrical connecting portion 12 as the center of rotation. Push box 3 up. Thereby, the interference between the low-power battery 2 and the fuse box 3 can be effectively avoided at the time of a frontal collision.

  In particular, according to the present embodiment, since the straight portion 10S of the air duct 10 extends from the rear of the weak electric battery 2 to the front of the fuse box 3, the air duct 10 is pushed by the low electric battery 2 at the time of a frontal collision. The action of rotating upward and pushing up the fuse box 3 easily occurs. In addition, the presence of the long straight portion 10S in the middle improves the sound vibration performance of the air duct 10.

  Further, according to the present embodiment, since the fuse box 3 is supported and fixed only at the end portion on the rear side of the vehicle, when the front duct collides, the air duct rotates to the upper side of the vehicle and pushes the fuse box 3 with less force. It can be pushed up with. Thereby, the intensity | strength and rigidity of the air duct 10 can be made low, and the cost and mass reduction by thickness reduction etc. are attained.

  Moreover, according to this Embodiment, since the non-restraining area | region where the movement of the branch line 5A of the wire harness 5 becomes free is provided in front of the fuse box 3 of the wire harness 5 connected to the fuse box 3, the air duct 10 When the fuse box 3 is pushed up by rotating to the upper side of the vehicle, no extra force is required to pull out the harness fixing clip (fastener) or pull the harness. Therefore, it is possible to push up the fuse box 3 with a small force, and from this point of view, the strength and rigidity of the air duct 10 can be reduced, and the cost and mass can be reduced by reducing the thickness.

  Further, according to the present embodiment, the air duct 10 passed between the low-power battery 2 and the fuse box 3 laid out side by side in the vehicle front-rear direction is positioned between the positive electrode 2A and the negative electrode 2B of the low-power battery 2. Therefore, the low-power battery 2 can be charged without removing the air duct 10 and the maintainability is improved.

  In addition, according to the present embodiment, the above effect can be easily achieved by setting the shape of the connecting portion of the air duct 10 and the air cleaner 4 to be cylindrical and keeping the direction of the axis LA in the left-right direction of the vehicle. Can play.

It is a top view which shows the partial layout in the component mounting room in embodiment of this invention. It is II-II arrow sectional drawing of FIG. It is the perspective view which looked at the positional relationship of the weak electric battery and fuse box in the said component mounting room without an air duct. It is a perspective view which shows the relationship between the weak electric battery in the said embodiment, a fuse box, and an air duct. It is sectional drawing which shows the structure of the connection part of the lower end of the air duct in FIG. 4, and an air cleaner. It is a figure for demonstrating the behavior at the time of a front collision, (a) is a figure before a collision, (b) is a figure which shows the state after a collision.

Explanation of symbols

2 ... Light battery 2A ... + Pole 2B ...- Pole 3 ... Fuse box 4 ... Air cleaner 5 ... Wire harness 5A ... Branch wire 10 ... Air duct 10S ... Straight line part 12 ... Cylinder connection part LA ... Axis line

Claims (7)

In the fuel cell vehicle component mounting room, a low-power battery and a fuse box are disposed adjacent to each other, and a cylinder for supplying air to the fuel cell unit is provided in the space between the low-power battery and the fuse box. A fuel cell vehicle component arrangement structure characterized in that a cylindrical air duct is passed as a buffer to prevent interference between the low-power battery and the fuse box in the event of a vehicle collision . The fuel cell vehicle component arrangement structure according to claim 1,
In the component mounting room located at the front end of the fuel cell vehicle, the low-power battery and the fuse box are positioned in the vehicle front-rear direction with the low-power battery positioned on the front side and the fuse box positioned on the rear upper side of the low-power battery. The fuel is characterized in that a cylindrical connection portion having an axis line in the left-right direction of the vehicle is provided at a position below the fuse box of an air duct that is arranged side by side and passes through a space between the low-power battery and the fuse box. Battery car parts arrangement structure. The fuel cell vehicle component arrangement structure according to claim 2,
The component connection structure of the fuel cell vehicle, wherein the cylindrical connection portion of the air duct is a fitting connection portion with respect to the cylindrical connection portion of the air cleaner. A fuel cell vehicle component arrangement structure according to claim 2 or 3,
The air duct that passes through the space between the low-power battery and the fuse box has a straight line portion that extends in an oblique straight line from below the fuse box and from behind the low-power battery to the front of the fuse box and above the low-power battery. The fuel cell vehicle component arrangement structure according to claim 1, wherein the cylindrical connecting portion is provided at a lowermost end portion of the straight portion. The fuel cell vehicle component arrangement structure according to claim 4,
The fuse box is supported and fixed only at an end portion on the vehicle rear side, and an end portion on the vehicle front side is a free end. The fuel cell vehicle component arrangement structure according to claim 5,
The branch line from the branch point of the wire harness connected to the fuse box to the fuse box is set longer than the shortest distance from the branch point to the fuse box, and between the branch point and the fuse box. The fuel cell vehicle component arrangement structure is characterized in that it is not fixed to the vehicle body with a fastener. The fuel cell vehicle component arrangement structure according to any one of claims 1 to 6,
The fuel cell vehicle component arrangement structure according to claim 1, wherein the air duct is disposed between a positive electrode and a negative electrode of the low-power battery.

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