JP3286634B2 - Power supply cooling device for hybrid vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply cooling device for a hybrid vehicle.

[0002]

2. Description of the Related Art In recent years, development of hybrid vehicles with high fuel efficiency using both an engine and a motor generator has been promoted, and practical use has already been achieved for passenger cars, while practical use has also been made for vehicle types such as trucks. Is about to be achieved.

In this type of hybrid vehicle, it is necessary to mount a high-voltage battery serving as a power supply for electric power traveling, and it is necessary to efficiently cool the high-voltage battery by air.

[0004]

However, particularly in the case of a cab overtrack or the like, it is difficult to mount the high-voltage battery on the cab side. Therefore, it is difficult to mount the high-voltage battery on the chassis behind the cab. However, when the high-voltage battery is mounted on the chassis in this way, an exhaust duct for exhausting the cooling air used to cool the high-voltage battery out of the battery case is opened near the road surface. Because
It was feared that splash (water splashing) during running or washing water by high-pressure washing of the lower surface of the vehicle would easily enter the battery case from the exhaust duct.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been made in view of the above circumstances. A power supply for a hybrid vehicle capable of air-cooling a high-voltage battery mounted on a chassis while reliably preventing water from entering a battery case. It is an object to provide a cooling device.

[0006]

The present invention SUMMARY OF THE INVENTION may, Shah houses a high-voltage battery constituting the power main battery in the battery case
A power supply cooling device for a hybrid vehicle mounted on an outer surface in a vehicle width direction of a sci-frame , configured to introduce cooling air into a battery case to air-cool a high-voltage battery, The chassis is provided with an exhaust duct for exhausting the cooling air that has cooled the high-voltage battery from the battery case.
I will face the outside of the frame with a slight gap
The opening is directed inward in the vehicle width direction .

Therefore, in the present invention, the exhaust duct for exhausting the cooling air introduced into the battery case is directed inward in the vehicle width direction so as to face the outer surface of the chassis frame.
The exhaust duct is open as long as splash (water splashing) during running or washing water from high-pressure washing of the underside of the vehicle does not enter the gap between the outer surface of the chassis frame and the opening of the exhaust duct. Therefore, intrusion into the exhaust duct directly, such as splash or washing water, is prevented.

[0008] In the present invention, the side walls near the opening in the interior of the exhaust duct, alternately arranged a plurality of shielding plates so that can prevent the intrusion of water from outside, the
Cooling air is meandered horizontally and exhausted by each shielding plate.
It is preferable to configure so that, in this way,
Even if splash or washing water gets around from the gap and jumps into the opening of the exhaust duct, the water collides with one of the shielding plates and is prevented from entering the back side. and the other, for the cooling air exhausted from the battery case, the horizontal to sew mutual each shielding plate
The gas is meandered in the direction and is discharged from the opening of the exhaust duct without any particular trouble.

Further, in the present invention, the bottom surface of the exhaust duct is formed as an inclined surface having a downward slope toward the opening side, and an inlet for guiding cooling air from the battery case is disposed near the top of the inclined surface. In this case, even if water enters into the exhaust duct due to some circumstances, the water is drained down toward the opening by the inclined surface and naturally drained. Therefore, the water does not reach the inlet near the top of the inclined surface, and the intrusion of water into the battery case is more reliably prevented.

[0010]

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

FIGS. 1 to 3 show an example of an embodiment of the present invention. In this embodiment, a case of a cab-over-track hybrid vehicle is illustrated. In the example shown here, FIG. A battery case 2 accommodating a high-voltage battery 1 (see FIGS. 2 and 3) serving as a power source for electric power traveling forms a chassis 4 behind the cab 3 (the left side of the chassis frame 5 in the traveling direction). 3 (see FIG. 3).
See).

Here, as shown in FIG. 2 in particular, the high-voltage battery 1 in the battery case 2 is supported by a deck plate 7 at a height substantially equal to that of the chassis frame 5. An auxiliary space (not shown) such as an inverter is accommodated in a surplus space 8 formed below the plate 7.

The lower end of a stack intake duct 9 which is fixed to the rear surface of the cab 3 and stands upright is connected to the upper surface of the front end side of the battery case 2 via a flexible bellows 10 or the like. A hood 11 (see FIG. 1) is attached to the top of the duct 9 so that foreign matters such as rainwater and dead leaves do not enter directly.
(See FIG. 1) is opened downward.

An air cleaner 14 having a filter 13 for filtering and purifying outside air introduced through the stack intake duct 9 is provided inside the front end of the battery case 2.
A blower 16 is provided which takes in the outside air purified through the above as cooling air, and introduces it through the communication duct 15 to the lower front end of the high-voltage battery 1 immediately after.

An exhaust duct 17 for exhausting cooling air passing through the high-voltage battery 1 to the outside of the battery case 2 is attached to the rear surface of the battery case 2 at a position substantially at the same height as the high-voltage battery 1. .

As shown in an enlarged view in FIG. 4, the exhaust duct 17 is configured to introduce cooling air from an upper inlet 19 through a communication duct 18 extending from the upper end of the rear surface of the high-voltage battery 1 in the battery case 2. Further, it is opened inward in the vehicle width direction so as to face the outer side surface of the chassis frame 5 with a slight gap therebetween, and both sides near the opening 20 (see FIG. 3) in the inside thereof have external parts. A plurality of shielding plates 21 are arranged alternately so as to prevent the intrusion of water from the air.
The air is meandering in the horizontal direction and exhausted .

Further, the bottom surface of the exhaust duct 17 is provided with an opening 20.
It is formed as an inclined surface 22 having a downward slope toward the side, and the introduction port 19 for guiding the cooling air from the battery case 2 is arranged near the top of the inclined surface 22.

When the blower 16 is driven to take in outside air from the stack intake duct 9 via the air cleaner 14, the clean and relatively low-temperature outside air at a sufficiently high position from the road surface behind the cab 3 is used as cooling air. The high-voltage battery 1 is taken into the battery case 2 and is introduced into the high-voltage battery 1. The high-pressure battery 1 is efficiently cooled, flows backward, and is exhausted from the exhaust duct 17 to the outside of the battery case 2.

In the power supply cooling device for a hybrid vehicle according to the present embodiment, an exhaust duct 17 for exhausting the cooling air introduced into the battery case 2 is provided on the inner side in the vehicle width direction so as to face the outer side surface of the chassis frame 5. because it is open toward the splash of running (the flip-up of water)
As long as the washing water or the high-pressure washing of the lower surface of the vehicle does not enter the gap between the outer surface of the chassis frame 5 and the opening 20 of the exhaust duct 17, the washing water does not enter the opening 20 of the exhaust duct 17, and splash, washing water, etc. Is prevented from directly entering the exhaust duct 17.

Further, in the present embodiment, even if splash or cleaning water or the like is spilled from a gap and jumps into the opening 20 of the exhaust duct 17, the water is applied to any of the shielding plates 21. As a result, the cooling air exhausted from the battery case 2 is meandered in a horizontal direction so as to sew between the shielding plates 21, thereby causing a particular problem. Exhaust duct 1 without
7 will be discharged from the opening 20.

Further, for some reason, the exhaust duct 17
Even if a situation arises in which water infiltrates into the back side of the slope, the water flows down toward the opening 20 by the inclined surface 22 and is naturally drained, so that near the top of the inclined surface 22 Water does not reach a certain inlet 19, and the intrusion of water into the battery case 2 is more reliably prevented.

Therefore, according to the above-described embodiment, it is possible to reliably prevent the splash during running or the washing water due to the high-pressure washing of the lower surface of the vehicle from entering the battery case 2. The air-cooling of the high-voltage battery 1 mounted on the side can be realized without any trouble.

The power supply cooling device for a hybrid vehicle according to the present invention is not limited to the above embodiment, but is applicable to hybrid vehicles other than overcab trucks. Of course, various changes can be made without departing from the scope.

[0024]

According to the power supply cooling device for a hybrid vehicle of the present invention described above, the following various excellent effects can be obtained.

(I) According to the first aspect of the present invention, the exhaust duct faces the outer surface of the chassis frame.
As it opens toward the inside in the vehicle width direction , as long as splash during running or washing water by high-pressure washing of the underside of the vehicle does not flow around from the gap between the side of the chassis frame and the opening of the exhaust duct Since the water does not enter the opening of the exhaust duct and the water can be prevented from directly entering the exhaust duct, it is possible to reliably prevent water from entering the battery case through the exhaust duct. Thus, air cooling of the high-voltage battery mounted on the chassis side can be realized without any trouble.

(II) According to the invention described in claim 2 of the present invention, even if splash or cleaning water or the like is spilled from the gap and jumps into the opening of the exhaust duct, any of the water is used. Since it is possible to prevent the intrusion to the back side by colliding with the shielding plate, the intrusion of water into the battery case can be more reliably prevented.

(III) According to the invention described in claim 3 of the present invention, even if a situation occurs in which water enters the interior of the exhaust duct due to some circumstances, the water is formed by the inclined surface. Since the water can be drained down to the opening and drained naturally, water can be prevented from reaching the inlet near the top of the inclined surface, and the intrusion of water into the battery case can be more reliably performed. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an example of an embodiment for implementing the present invention.

FIG. 2 is a cross-sectional view showing details inside the battery case of FIG. 1;

FIG. 3 is a view in the direction of arrows III-III in FIG. 2;

FIG. 4 is a perspective view showing details of an exhaust duct in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High voltage battery 2 Battery case 4 Chassis 5 Chassis frame 17 Exhaust duct 19 Inlet 20 Opening 21 Shielding plate 22 Slope

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60K 1/04 B60K 6/02 B60K 11/00 B60K 11/06

Claims (3)

(57) [Claims] A high-voltage battery serving as a power supply for electric power travel is housed in a battery case and is mounted in a width direction of a chassis frame.
A power supply cooling device for a hybrid vehicle mounted on an outer surface of the vehicle, the cooling air being introduced into a battery case so that the high-voltage battery can be air-cooled, and the cooling air obtained by air-cooling the high-pressure battery from the battery case. Exhaust ducts for exhausting air should be slightly spaced from the outer surface of the chassis frame.
A power supply cooling device for a hybrid vehicle, characterized in that it is opened inward in the vehicle width direction so as to face each other with a gap therebetween . 2. The two parts near the opening inside the exhaust duct.
A plurality of shielding plates are alternately arranged on the side wall so as to prevent water from entering from outside, and the cooling air is
The power supply cooling device for a hybrid vehicle according to claim 1, wherein the exhaust is meandering in a horizontal direction and exhausted . 3. A bottom surface of the exhaust duct is formed as an inclined surface having a downward slope toward the opening side, and an inlet for guiding cooling air from a battery case is disposed near a top of the inclined surface. Item 3. A power supply cooling device for a hybrid vehicle according to item 1 or 2.