JP2015105082A - Electric component arrangement structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric component arrangement structure of a vehicle which enables wiring connected with a power storage device and a battery to be shortened while preventing heat damage of an electric power conversion system.SOLUTION: In an electric component arrangement structure of a vehicle, an engine 20, a power generator 21 driven by the engine 20, a power storage device 22 which stores electric power generated by the power generator 21, an electric power conversion system 24 which converts the electric power from the power storage device, and a battery 23 to which the electric power is supplied through the electric power conversion system 24 are disposed in an engine room 3 which is divided from a vehicle cabin 2 by a dash panel 1. The electric power conversion system 24 is disposed along a side surface of the battery 23 which is opposite to the engine 20 in a vehicle width direction.

Description

  The present invention relates to a vehicle electrical component arrangement structure.

  In recent vehicles, in addition to the battery, there are many that are separately equipped with a power storage device that stores the power generated by the generator, and a device that uses this power storage device as a capacitor has already been put into practical use. The power storage device is generally set to a higher voltage than the battery. For this reason, the power from the generator and the power storage device is supplied to the battery or the electric device via a power conversion device such as a DC / DC converter, for example. It is supplied to the kind.

  The above-described generator, power storage device, and battery are generally arranged in an engine room. On the other hand, in order to avoid heat damage, the power conversion device is generally disposed in the vehicle compartment (for example, the space under the front seat) rather than in the engine room that tends to be hot (see Patent Document 1). ).

JP 2013-107513 A

  When the power conversion device is disposed in the vehicle interior as described in Patent Document 1, the wiring for connecting to the power storage device and the battery becomes extremely long. That is a problem in terms of power loss.

  The present invention has been made in consideration of the above-described circumstances, and an object of the present invention is to provide a vehicle capable of shortening the wiring between the power storage device and the battery while preventing thermal damage of the power conversion device. It is to provide an electrical component arrangement structure.

In order to achieve the above object, the following solution is adopted in the present invention. That is, as described in claim 1,
An engine, a generator driven by the engine, a power storage device that stores power generated by the power generator, and power from the power storage device are converted into an engine room separated from the vehicle compartment by a dash panel. And a battery to which electric power is supplied from at least one of the generator or the power storage device via the power conversion device,
The power converter is disposed along a side surface of the battery that is opposite to the engine in the vehicle width direction.
It is like that.

  According to the above-described solution, the power conversion device that avoids high temperatures is disposed along the side surface of the battery opposite to the engine serving as a heat source across the battery, from the side surface of the battery. As a position where the high temperature from the engine is avoided, the heat damage can be prevented. In particular, since the battery itself is also disposed in a part of the engine room that is relatively difficult to reach a high temperature, power conversion is achieved by disposing a power conversion device on the opposite side of the vehicle from the engine across the battery. This is extremely preferable for preventing thermal damage of the apparatus. Moreover, the wiring related to a power converter device can be shortened by arrange | positioning a power converter device in an engine room. In particular, since the battery and the power conversion device are close to each other, it is extremely preferable for shortening the wiring.

A preferred mode based on the above solution is as described in claim 2 and the following claims. That is,
A suspension tower portion and a fuse box are disposed in front of the suspension tower portion on the outside in the vehicle width direction of the power conversion device in the vicinity of the power conversion device.

(Corresponding to claim 2). In this case, the power conversion device is disposed at a position far away from the engine, such as near the suspension tower, which is more preferable for preventing thermal damage. In addition, the power conversion device is disposed near the fuse box, which is more preferable in terms of shortening the wiring. In addition to the above, the fuse box in front of the suspension tower functions as a kind of diffuser to increase the flow velocity of the traveling wind passing through the side surface of the power converter, and is more preferable for cooling the power converter. It will be a thing.

The suspension tower portion has a substantially semicircular arc shape so that its horizontal cross-sectional shape is convex toward the inner side in the vehicle width direction,
The power conversion device is disposed in front of a top portion that protrudes most inward in the vehicle width direction of the suspension tower portion.
(Corresponding to claim 3). In this case, the power conversion device can be disposed so as not to overlap the top of the suspension tower portion in the vehicle width direction and the power conversion device is positioned as far as possible in the vehicle width direction. In addition, it is preferable for cooling the power conversion device with the traveling wind toward the front wall portion of the suspension tower.

The power storage device, the battery, and the power conversion device are disposed near one front frame of a pair of left and right front frames extending in the front-rear direction in plan view,
The power storage device is disposed on the outer side in the vehicle width direction of the one front frame,
The power conversion device is disposed behind the power storage device, and is disposed on the inner side in the vehicle width direction of the power storage device so as not to overlap the power storage device in a front view.
(Corresponding to claim 4). In this case, while the power storage device is cooled by the sufficiently cool traveling wind immediately after being introduced into the engine room, the traveling wind flows to the power conversion device without being disturbed by the power storage device. This is preferable for cooling the conversion device.

  ADVANTAGE OF THE INVENTION According to this invention, the wiring relevant to a power converter device can be shortened, preventing the heat damage of a power converter device.

The top view which shows the electrical equipment arrangement | positioning condition in the engine room of the vehicle to which this invention was applied. The partial cross section front view which shows the electrical equipment arrangement | positioning condition in the engine room shown in FIG. The principal part top view which shows a suspension tower part in cross section. The figure which shows the example of a connection of an electrical component.

  In FIG. 1, reference numeral 1 denotes a dash panel extending in the vehicle width direction and the up-down direction. The dash panel 1 partitions the rear compartment 2 and the front engine compartment 3. Reference numeral 4 denotes a floor panel constituting the passenger compartment floor, and 5 denotes a floor frame that is joined to the lower surface of the floor panel and extends in the front-rear direction. A pair of left and right front frames 10 extending in the front-rear direction are disposed in the engine room 3, and a rear end portion of the floor frame 10 is connected to the floor frame 5.

  A bumper rain 12 extending in the vehicle width direction is connected to the front end portions of the pair of left and right front frames 10 via a crash can 11. Further, a lower end portion of a wheel apron 13 is joined to the front frame 10 (see FIG. 2), and a suspension tower portion 14 is formed on the wheel apron 13 on the outer side in the vehicle width direction of the front frame 10. .

  In the engine room 3, an engine 20, an alternator 21 as a generator, a capacitor 22 as a power storage device, a battery 23, a DC / DC converter 24 as a power conversion device, and a fuse box 17 are arranged.

  FIG. 4 shows an example of the electrical connection relationship between the alternator 21, the capacitor 22, the battery 23, and the DC / DC converter 24. In FIG. 5, reference numeral 50 denotes an electrical load such as an air conditioner device, an audio device, and various lighting devices. The battery 23 is for low voltage (for example, 12v), and the capacitor 22 is for high voltage (for example, 24v). The electric power generated by the alternator 21 is supplied to the battery 23 (for charging) or the electric load 40 via the DC / DC converter 24. Regenerative energy at the time of deceleration is stored in the capacitor 22 as power generated by the alternator 21. The electric power stored in the capacitor 21 is supplied to the electric load 50 while being stepped down via the DC / DC converter 24, but may be used for charging the battery 23.

  In FIG. 1, the engine 20 is placed horizontally and is disposed in front of the pair of left and right suspension towers 14. The engine 20 is disposed offset to the right side of the center position in the vehicle width direction of the engine room 3, and a transmission (not shown) is connected to the left side of the engine 20. In the embodiment, the engine 20 is a reciprocating spark ignition engine typified by a gasoline engine, but the type of the engine is not particularly limited.

  An alternator 21 is disposed in front of the engine 20. The alternator 21 is also disposed offset to the right side in the vehicle width direction and is positioned in the vicinity of the right front frame 10.

  The capacitor 22 is attached to the front end of the left front frame 20 and is located on the outer side in the vehicle width direction with respect to the front frame 20. The capacitor 22 is disposed so as to be positioned on the same line as the alternator 21 in the vehicle width direction in plan view. Note that the capacitor 22 has a shape elongated in the vertical direction.

  A battery tray 25 is attached to the left front frame 10. That is, the battery tray 25 is fixed to the front frame 10 via the bracket 26 fixed to the front frame 10 as shown in FIG. A battery 23 is placed and fixed on the battery tray 25. Note that the battery tray 25 is generally located on the inner side in the vehicle width direction with respect to the left front frame 10.

  The DC / DC converter 24 has a generally rectangular shape that is thinned in the vehicle width direction, and is disposed adjacent to the battery 23 along the outer side surface of the battery 23 in the vehicle width direction. That is, the DC / DC converter 24 is disposed along the left side surface that is opposite to the engine 20 in the vehicle width direction across the battery 23, among the left and right side surfaces of the battery 23.

  The size of the DC / DC converter 24 is formed to be small so as to substantially overlap the battery 23 in a side view, and to be within a vehicle width direction extension area of the battery 23. Since the battery 23 is located on the inner side in the vehicle width direction with respect to the left front frame 10, the DC / DC converter 24 is disposed so as to be located almost directly above the left front frame 10. ing.

  A cooling fin 24 a is formed on the left side surface of the DC / DC converter 24. Although the cooling fins 24a are illustrated in a simplified manner, the cooling fins 24a are elongated in the vertical direction, and are formed in a large number at small intervals in the front-rear direction.

  A mounting example of the DC / DC converter 24 will be described with reference to FIGS. First, as shown in FIG. 2, a locking hole 25 a is formed in the battery tray 25, and a locking projection 24 b extending downward from the locking hole 25 a formed on the lower surface of the DC / DC converter 24. It is fitted without rattling.

  Further, the DC / DC converter 24 is fixed to the suspension tower portion 24 via the mounting bracket 30. A bolt as a fixing tool for fixing the mounting bracket 30 to the DC / DC converter 24 is denoted by reference numeral 31, and a bolt as a fixing tool for fixing the mounting bracket 30 to the suspension tower portion 14 is denoted by reference numeral 32. Indicated.

  A fuse box 17 is disposed in the vicinity of the left front frame 10 at a position immediately before the suspension tower portion 14. That is, the suspension tower portion 14 and the fuse box 17 are positioned in series in the front-rear direction outside the power converter 24 in the vehicle width direction.

  As shown in FIG. 3, the suspension tower portion 14 has a substantially semicircular arc shape so that the cross-sectional shape in the horizontal direction protrudes inward in the vehicle width direction, and becomes a protruding end inward in the vehicle width direction. The top is indicated by reference numeral 14a. The DC / DC converter 24 is disposed in front of the top portion 14a.

  The fuse box 17 is disposed so as to overlap the suspension tower portion 14 in a front view when viewed from the front-rear direction. The side position on the inner side in the vehicle width direction and the top portion 14a of the suspension tower portion 14 are The position in the width direction is set to be substantially the same position. The DC / DC converter 24 is arranged in parallel so as to follow the fuse box 17 and the suspension tower portion 14 that are arranged in series in the front and rear.

  In the configuration as described above, since the DC / DC converter 24 is disposed in the engine room 3, the wiring thereof is shortened compared to the case where the DC / DC converter 24 is disposed in the vehicle compartment 2. Therefore, the cost can be reduced and the power loss can be reduced. Although the alternator 21 and the capacitor 22 are largely separated in the vehicle width direction, they are arranged so as to be located substantially on the same line in the vehicle width direction in a plan view. Thus, the wiring can be shortened. Further, it is preferable that the DC / DC converter 24 is adjacent to the battery 23 in order to shorten the wiring for connecting the two. By disposing the fuse box 17 near the DC / DC converter 24, it is further preferable in terms of shortening the wiring.

  The capacitor 22 that dislikes the high temperature is preferably separated from the engine 20 and the alternator 21 that are likely to be high in the vehicle width direction as much as possible to cool the capacitor. Of course, since the capacitor 22 is located near the front end of the front frame 10, the capacitor 22 is exposed to a sufficiently cool running wind immediately after being taken into the engine room 3, and is a preferable arrangement for cooling.

  In plan view, the capacitor 22 and the DC / DC converter 24 are arranged offset in the vehicle width direction, so that the running wind after flowing in the vicinity of the capacitor 22 flows smoothly toward the DC / DC converter 24 side. This is preferable.

  The battery 23 and the DC / DC converter 24, each of which is not suitable for high temperatures, can be arranged together as one set body, and are also preferable in terms of improving the ease of assembly to the vehicle body. Of course, since the DC / DC converter 24 is disposed at a position far away from the engine 20 and the alternator 21 that are likely to be high in temperature, the DC / DC converter 24 is more preferable for preventing thermal damage of the DC / DC converter 24.

  Although the embodiments have been described above, the present invention is not limited to the embodiments, and appropriate modifications can be made within the scope of the claims. The power storage device is not limited to the capacitor 22 and may be a high-capacity secondary battery such as a lithium ion battery. Of course, the object of the present invention is not limited to what is explicitly stated, but also implicitly includes providing what is substantially preferred or expressed as an advantage.

  The present invention is suitable for a vehicle having a DC / DC converter.

1: Dash panel 2: Vehicle compartment 3: Engine compartment 10: Front frame 14: Suspension tower 14a: Top (projecting end toward the inside in the vehicle width direction)
17: Fuse box 20: Engine 21: Alternator (generator)
22: Capacitor (power storage device)
23: Battery 24: DC / DC converter 24a: Cooling fin 25: Battery tray 30: Bracket 31: Bolt (fixing tool)
32: Bolt (fixing tool)
50: Electric load

Claims (4)

An engine, a generator driven by the engine, a power storage device that stores power generated by the power generator, and power from the power storage device are converted into an engine room separated from the vehicle compartment by a dash panel. And a battery to which electric power is supplied from at least one of the generator or the power storage device via the power conversion device,
The power converter is disposed along a side surface of the battery that is opposite to the engine in the vehicle width direction.
A vehicle electrical component arrangement structure characterized by the above. In claim 1,
A vehicle electrical component arrangement structure, characterized in that a suspension tower portion and a fuse box are disposed in front of the suspension tower portion on the outside in the vehicle width direction of the power conversion device in the vicinity of the power conversion device. In claim 2,
The suspension tower portion has a substantially semicircular arc shape so that its horizontal cross-sectional shape is convex toward the inner side in the vehicle width direction,
The power conversion device is disposed in front of a top portion that protrudes most inward in the vehicle width direction of the suspension tower portion.
A vehicle electrical component arrangement structure characterized by the above. In any one of Claims 1 thru | or 3,
The power storage device, the battery, and the power conversion device are disposed near one front frame of a pair of left and right front frames extending in the front-rear direction in plan view,
The power storage device is disposed on the outer side in the vehicle width direction of the one front frame,
The power conversion device is disposed behind the power storage device, and is disposed on the inner side in the vehicle width direction of the power storage device so as not to overlap the power storage device in a front view.
A vehicle electrical component arrangement structure characterized by the above.

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