JP6094852B2 - High voltage cable routing structure for vehicles - Google Patents

Description

  The present invention relates to a high-voltage cable routing structure that connects an electric motor disposed at the front of a vehicle body and a battery disposed at the rear of the vehicle body.

  For example, in a hybrid vehicle including an engine and an electric motor as drive sources, the engine and the electric motor are often arranged in the engine room at the front of the vehicle body, and the battery is often arranged in the luggage compartment at the rear of the vehicle body. The battery is electrically connected by a high voltage cable.

  By the way, a fuel tank is generally arranged between the engine room and the cargo room, and some arrangement is required for the arrangement of the high voltage cable and the fuel tank. Note that the fuel tank that is disposed under the floor of the vehicle and fixed to the vehicle body by the fixed belt is suspended and supported while being pressed against the floor panel by tightening the fixed belt.

  Here, the conventional example of the wiring structure of the high voltage cable in a hybrid vehicle is shown in FIG.5 and FIG.6.

  5 and 6 are schematic plan views of a vehicle showing a conventional example of a high-voltage cable routing structure in a hybrid vehicle. In the hybrid vehicle 110 shown in these drawings, an engine 101 as a drive source and The electric motor 102 is disposed in the engine room S1 at the front of the vehicle body, and the battery 103 is disposed in the luggage compartment S3 at the rear of the vehicle. A fuel tank 104 is disposed below the rear floor of the vehicle compartment S2 and in front of the battery 103, and an exhaust pipe 105 extending from the engine 101 is drawn out from the engine room S1 to the floor under the vehicle width below the floor. After extending in the center of the direction toward the rear of the vehicle, the fuel tank 104 is bent to the right to avoid the fuel tank 104, and then the right side of the fuel tank 104 extends in a straight line toward the rear of the vehicle. The muffler 106 is connected.

  Thus, in the example shown in FIG. 5, the high-voltage cable 109 that connects the electric motor 102 and the battery 103 is drawn from the electric motor 102 in the engine room S1 to the floor under the vehicle compartment S2, and the vehicle compartment S2 The left side of the exhaust pipe 105 below the floor of the vehicle extends straight in parallel with the exhaust pipe 105 toward the rear of the vehicle and is bent to the right by avoiding the fuel tank 104 and then the right side of the fuel tank 104 is connected to the exhaust pipe 105. It extends in a straight line toward the rear of the vehicle in parallel. The high voltage cable 109 is drawn into the cargo compartment S3 from under the floor at the right rear portion of the fuel tank 104, and is connected to the battery 103 disposed in the cargo compartment S3.

  In the example shown in FIG. 6, the high voltage cable 109 is drawn from the electric motor 102 in the engine room S1 to the floor under the vehicle compartment S2, and extends in a straight line under the floor of the vehicle compartment S2 toward the rear of the vehicle. In front of the fuel tank 104, it is drawn into the vehicle compartment S2 from under the floor, linearly extends in the vehicle compartment S2 toward the rear of the vehicle, and is connected to the battery 103 disposed in the cargo compartment S3. Such a high-voltage cable routing structure is also proposed in Patent Document 1.

JP 2011-068187 A

  However, in the example shown in FIG. 5, the high voltage cable 109 extending linearly from the electric motor 102 toward the rear of the vehicle is bent at a right angle while avoiding the fuel tank 104, and the high voltage cable 109 is passed beside the fuel tank 104. Therefore, there is a problem that the length of the high voltage cable 109 becomes long. Further, since the high voltage cable 109 and the exhaust pipe 105 are routed on the same side (right side in the illustrated example) next to the fuel tank 104, the high voltage cable 109 is not affected by the thermal influence from the exhaust pipe 105. There is also a problem that it is necessary to take measures against heat. In order to avoid this problem, when the high voltage cable 109 and the exhaust pipe 105 are routed on the left and right sides with the fuel tank 104 interposed therebetween, there arises a problem that the capacity of the fuel tank 104 is sacrificed.

  In the example shown in FIG. 6, there is a problem that a part of the high-voltage cable 109 passes through the passenger compartment S2, so that the living space of the passenger compartment S2 is reduced. In addition, since it is necessary to route the high voltage cable 109 between the rear seat and the rear floor in the passenger compartment S2, the design of the rear seat is complicated, the degree of freedom in designing the rear seat is limited, and the seat format options are limited. Besides the reduction, there is a problem that the rear floor cannot be flattened.

  The present invention has been made in view of the above problems, and an object of the present invention is that the electric motor and the battery can be connected with the shortest distance by a high voltage cable without sacrificing the living space of the passenger compartment. An object of the present invention is to provide a high-voltage cable wiring structure for a vehicle.

In order to achieve the above object, according to a first aspect of the present invention, an electric motor is disposed in an engine room at a front portion of a vehicle body, a battery is disposed in a luggage compartment at a rear portion of the vehicle body, and the electric motor and the battery are connected to a high voltage cable. And a high-voltage cable routing structure for a vehicle in which a fuel tank is disposed below a floor panel between the electric motor and the battery, and the electric motor is disposed on the upper surface of the fuel tank. A recess formed in a straight line from the battery to the battery, the high voltage cable is routed between the recess and the floor panel, and the high voltage cable connected to the electric motor is extends straight and rearward below the floor panel, is fixed to the vehicle body by a fixing belt the fuel tank, the high electrostatic the fixing belt in plan view And arranged to intercept the cable, a both sides of the recess of the fuel tank, in a position overlapping the fixed belt in plan view, characterized in that a contact surface to the floor panel of the fuel tank.

According to the first aspect of the present invention, since the high-voltage cable from the electric motor can be routed straight to the battery without passing through the vehicle interior, the vehicle interior space is sacrificed. The electric motor and the battery can be connected at the shortest distance by the high voltage cable. In addition, the high voltage cable can be routed away from the exhaust pipe by passing the high voltage cable through the recess on the upper surface of the fuel tank, and the high voltage cable is protected against thermal influence from the exhaust pipe. Is no longer necessary. In addition, a high-voltage cable extending from the electric motor is passed from the engine room to the under floor of the passenger compartment to extend the under floor in a straight line to the rear of the vehicle, and then drawn into the luggage compartment at the rear of the vehicle body. By connecting, the high-voltage cable does not pass through the passenger compartment, so that the residential space in the passenger compartment is not limited by the high-voltage cable, and a large residential space can be secured. Further, since the high voltage cable is not routed on the floor of the passenger compartment, the upper surface of the floor can be flattened, the degree of freedom in designing the rear seat is increased, and the choice of seat format is increased. Further, the fuel tank is fixed to the floor panel by a fixing belt, the fixing belt is arranged so as to intersect the high voltage cable in plan view, and the fuel tank is positioned so as to overlap the fixing belt in plan view on both sides of the recess of the fuel tank. Since the contact surface to the floor panel is arranged, the vertical deflection of the fuel tank and the amount of movement of the fuel tank due to vibration during vehicle travel can be suppressed, and the amount of movement of the fuel tank can be suppressed. While preventing interference, the gap between the high voltage cable and the fuel tank can be minimized, and the capacity of the fuel tank can be ensured.

1 is a schematic plan view of a vehicle showing a routing structure according to the present invention of a high voltage cable in a hybrid vehicle. It is the sectional view on the AA line of FIG. FIG. 3 is a sectional view taken along line B-B in FIG. 2. It is a perspective view of the fuel tank part of a hybrid vehicle. It is a schematic plan view of a vehicle showing a conventional example of a high voltage cable routing structure in a hybrid vehicle. It is a schematic plan view of a vehicle showing a conventional example of a high voltage cable routing structure in a hybrid vehicle.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 is a schematic plan view of a vehicle showing a wiring structure according to the present invention of a high voltage cable in a hybrid vehicle, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB in FIG. 4 and 4 are perspective views of the fuel tank portion of the hybrid vehicle.

  In the hybrid vehicle 10 shown in FIG. 1, the engine 1 and the electric motor 2 that are driving sources are disposed in the engine room S1 at the front of the vehicle body, and the battery 3 is disposed in the luggage compartment S3 at the rear of the vehicle body. A fuel tank 4 is disposed laterally below the rear floor of the vehicle compartment S2 and in front of the battery 3 in the front-rear direction of the vehicle (actually, the battery 3 is located in the cargo compartment above the floor panel 7). The fuel tank 4 is disposed in the lower side of the floor panel 7 and is disposed in a different position in the vertical direction of the vehicle so that the battery 3 is disposed in the upper position. The exhaust pipe 5 extending from 1 is pulled out from the engine room S1 to the bottom of the floor, extends approximately in the center of the vehicle width direction below the floor toward the rear of the vehicle, and then to the right of the fuel tank 4 in front of the fuel tank 4 The right side of the fuel tank 4 extends in a straight line toward the rear of the vehicle, and a muffler 6 is connected to the rear end thereof.

  By the way, in the present embodiment, as shown in FIGS. 2 to 4, a recess 4 a penetrating in the vehicle front-rear direction is formed in the upper left side of the fuel tank 4 (on the side opposite to the exhaust pipe 5). As shown in FIG. 2, the fuel tank 4 is disposed in a concave space formed under the floor by the floor panel 7 of the passenger compartment S2, and is made of metal whose both ends are fastened and fixed to the vehicle front-rear position of the fuel tank 4. These two fixing belts 8 are fixed to the vehicle body. That is, the fuel tank 4 is pressed against the floor panel 7 by tightening the two fixing belts 8 and is suspended and supported by the vehicle body while being sandwiched between the fixing belt 8 and the floor panel 7.

  Thus, in the present embodiment, the electric motor 2 and the battery 3 are electrically connected by the high voltage cable 9, but as shown in FIG. 1, the high voltage cable 9 is connected to the engine room S1. It is pulled out from the electric motor 2 to the under floor of the passenger compartment S2, and the left side of the exhaust pipe 5 under the floor of the passenger compartment S2 (the side where the electric motor 2 in the arrangement relationship between the electric motor 2 and the engine 1 is arranged) faces the vehicle rear. As shown in FIG. 2, a part thereof is disposed in a space between the recess 4a formed on the upper surface of the fuel tank 4 and the floor panel 7, and penetrates the space. The high voltage cable 9 that has passed over the fuel tank 4 in the vehicle front-rear direction is drawn into the cargo compartment S3 from a hole formed in the floor panel 7 at the rear of the fuel tank 4, and its end is the cargo compartment S3. Is connected to the battery 3 disposed in the.

  Here, the two fixing belts 8 for fixing the fuel tank 4 are arranged such that, when seen in a plan view, the fixing portion to the vehicle body at the front end is in the lateral direction of the vehicle in the left-right direction of the vehicle relative to the fixing portion to the vehicle body at the rear end. In addition, it is arranged and fixed on both sides of the recess 4a in the left-right direction of the vehicle so as to be located in the left and right directions, and is obliquely arranged so as to open upward in a reverse C shape as shown in FIG. ing. Specifically, in plan view, as shown in FIG. 3 (only the left side fixing belt 8 is shown in FIG. 3), it has a square shape toward the rear of the vehicle (upward in FIG. 3) so as to intersect the high voltage cable 9. It is arranged diagonally. That is, the high voltage cable 9 includes a front fixed portion (fixed to the vehicle body) of the left fixed belt 8 and a fixed portion (fixed to the vehicle body) at the rear end of the left fixed belt 8 in the left-right direction of the vehicle. It is routed between. In the present embodiment, as shown in FIGS. 3 and 4, positions that are on both sides of the recess 4 a of the fuel tank 4 and overlap the fixed belt 8 in plan view (positions a and b in the drawing). Further, a contact surface of the fuel tank 4 to the floor panel 7 is arranged.

  As described above, in the present embodiment, after the high voltage cable 9 extending from the electric motor 2 is passed from the engine room S1 to the under floor of the passenger compartment S2 to extend the under floor in a straight line to the rear of the vehicle, Since it is drawn into the luggage compartment S3 and connected to the battery 3 disposed in the luggage compartment S3, the electric motor 2 can be connected to the floor in the compartment S2 and the battery in the cargo compartment S3 without passing through the compartment S2. The voltage cable 9 can be wired in a straight line, and the electric motor 2 and the battery 3 can be connected by the shortest distance by the high voltage cable 9 without sacrificing the living space of the passenger compartment S2.

  Further, since the high voltage cable 9 is not routed on the floor in the passenger compartment S2, the upper surface of the floor can be flattened to improve the comfort in the room, increasing the degree of freedom in designing the rear seat, and the seat format The effect of increasing the number of options is also obtained.

  Furthermore, in the present embodiment, the high voltage cable 9 is arranged in the recess 4a on the upper surface of the fuel tank 4, and the high voltage cable 9 can be routed away from the exhaust pipe 5 by passing through the recess 4a. Therefore, a heat countermeasure for protecting the high voltage cable 9 from the thermal influence from the exhaust pipe 5 becomes unnecessary. Further, the high voltage cable 9 in the part can be protected by the fuel tank 4.

  In the present embodiment, the fuel tank 4 is fixed to the vehicle body by the fixing belt 8, and the fixing belt 8 is arranged so as to intersect the high voltage cable 9 in a plan view, or both sides of the recess 4 a of the fuel tank 4. Since the contact surface to the floor panel 7 of the fuel tank 4 is arranged at a position overlapping with the fixing belt 8 in a plan view of FIG. The amount of movement can be suppressed, and interference between the high voltage cable 9 and the fuel tank 4 can be prevented.

  Although the present invention has been described with respect to a configuration in which the present invention is applied to a high-voltage cable routing structure of a hybrid vehicle including an engine and an electric motor, the present invention is not limited to the arrangement of a high-voltage cable in an electric vehicle, a fuel cell vehicle, or the like. Of course, the present invention can be similarly applied to the cable structure.

DESCRIPTION OF SYMBOLS 1 Engine 2 Electric motor 3 Battery 4 Fuel tank 4a Recessed part of fuel tank 5 Exhaust pipe 7 Floor panel 8 Fixed belt 9 High voltage cable 10 Hybrid vehicle (vehicle)
S1 Engine room S2 Car compartment S3 Cargo compartment

Claims (1)

An electric motor is arranged in the engine room at the front of the vehicle body, a battery is arranged in the luggage compartment at the rear of the vehicle body, the electric motor and the battery are connected by a high voltage cable, and a fuel tank is connected to the electric motor and the battery. A vehicle high-voltage cable routing structure arranged below a floor panel between
A concave portion formed linearly from the electric motor toward the battery is formed on the upper surface of the fuel tank, and the high voltage cable is routed between the concave portion and the floor panel,
The high voltage cable connected to the electric motor extends in a straight line to the rear of the vehicle below the floor panel ,
The fuel tank is fixed to the vehicle body by a fixing belt, and the fixing belt is arranged so as to intersect the high voltage cable in a plan view.
A high-voltage cable routing structure for a vehicle , wherein a contact surface of the fuel tank against the floor panel is disposed on both sides of the concave portion of the fuel tank and at a position overlapping the fixing belt in plan view .

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