JPH071973A - Electric vehicle battery temperature controller - Google Patents

Abstract

PURPOSE:To provide a battery temperature regulating device for an electric automobile in which a duct can be arranged in the optimal position without being influenced by an arranging position of a main contactor. CONSTITUTION:A battery frame 2 is installed under a floor panel 1 so as to be mountable and demountable. A duct is installed on the front end of the floor panel 1. In the duct 14, its front end is opened in the car body front part, and a branch part 17 is arranged on its rear side, and the branch ends are bent downward, and are installed on left and right inlets 18 on the front end of the floor panel 1. Suction fans 13 are arranged in outlets 12 on the rear end of the floor panel 1. A main contactor 20 is arranged close to the front part of a floor tunnel part T in the central part of the branch ends of the duct 14, and harnesses 23 separable by connectors 24 are arranged and laid so as to reach the battery frame 2 from the main contactor 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery temperature controller for an electric vehicle.

[0002]

2. Description of the Related Art In an electric vehicle, in order to obtain a long cruising distance, it is an important factor to secure a proper discharge amount of a battery in addition to weight reduction of a vehicle body and increase of battery capacity. .

The amount of discharge of the battery largely depends on the ambient temperature in which the battery is installed, and the discharge is efficiently performed when the ambient temperature is 30 to 50 ° C. Also,
When using multiple batteries in series, if there are variations in the ambient temperature, the efficiency will drop significantly.
It is required that the ambient temperature of each battery be kept constant.

Therefore, for example, a duct for introducing temperature-controlled air is provided in front of the portion where the battery is arranged and in the approximate center of the vehicle width direction, and outside air or heated air is evenly introduced into the left and right batteries to remove the battery. It is possible to control the temperature without variation.

[0005]

By the way, in an electric vehicle, it is necessary to provide a main contactor, which is a high-voltage control component, between the battery and the motor. The main contactor is connected to a plurality of batteries. Therefore, it is desirable to dispose it at a substantially central portion in the vehicle width direction, and it is desirable to dispose it as close as possible to the motor disposed at the front part of the vehicle body to shorten the wiring.

However, the main contactor provided in the vehicle width direction substantially in the center and on the front side of the vehicle body is also provided in the vehicle width direction in the center and in front of the battery arrangement portion. There is a problem that it interferes with the location of the duct.

On the other hand, if the position of the temperature-controlled air introducing duct is shifted to avoid this interference, the battery temperature will fluctuate, which will cause a decrease in battery cooling and heating efficiency. If the position of the contactor is shifted, the wiring length for each battery becomes long as a whole, and the wiring work becomes troublesome.

Therefore, the present invention provides a battery temperature control device for an electric vehicle, which is not affected by the position of the main co-tanchter and can arrange the duct at an optimum position.

[0009]

A battery cooling device for an electric vehicle in which a battery frame divided from a floor panel of a vehicle body is detachably attached to a floor panel of the vehicle body, the duct being open at a front portion of the vehicle body. This duct is branched at the front of the floor panel to provide a branch portion, and each branch end is attached to the inlet provided on the left and right of the front end portion of the floor panel, and the rear end portion of the battery frame or the floor panel. The main contactor is located near the front end in the floor tunnel behind the branch of the duct, and the harness is routed from the main contactor to the drive unit at the front of the vehicle and the front end of the battery frame. And the harness leading to the battery frame is separable by the connector

[0010]

By branching the duct and attaching it to the battery frame, it is possible to uniformly regulate the temperature of the battery and to dispose the main contactor at the center of the battery frame in the vehicle width direction and toward the front.

By separating the harness between the main contactor and the battery by the connector, the work of removing the battery frame from the floor panel of the vehicle body is facilitated.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 2, a floor panel 1 of the vehicle body
A battery frame 2 which is separated from the floor panel 1 is provided under the bolts and nuts BN as shown in FIGS.
It is detachably attached by.

The battery frame 2 has a plate 3 at the bottom.
As shown in FIG. 3, a portion surrounded by the left and right side frames 4 and the front and rear cross frames 5, 5 has a center frame 6 extending in the front-rear direction at a central portion in the vehicle width direction,
A partition frame 7 provided across the center frame 6 and the side frame 4 divides it into a lattice shape, and a mounting portion 9 for the battery 8 is formed therein. 6A indicates a subframe. On each mounting portion 9, a set of two batteries 8 is arranged in four rows.

On the other hand, the floor panel 1 is provided with an upper plate 11 having a floor tunnel portion T on an upper portion of a frame 10 as shown in FIG. 2, and a pair of left and right suction fans 13 are provided at an outlet 12 at a rear end portion. ing. A duct 14 is removably attached to the front end of the floor panel 1.

As shown in FIG. 2, the duct 14 includes a motor 15 as a drive unit and a power head (inverter) 16 as a drive unit.
In the front part of the vehicle in which is stored, the vehicle has a square cross section with an open front end, and a branch part 17 shown in FIG. 3 is provided behind it. Behind the branch portion 17 and in front of the battery frame 2, the duct 14 is divided into two with a circular cross section and bent downward, and further bent rearward so that each branch end enters the inlet 18 of the front end portion of the floor panel 1. It is detachably attached. Here, on the floor panel 1 to which the rear end portion of the duct 14 is attached, as shown in FIG. 3, guide members 19 directed to respective rows of the battery 8 are provided on the left and right,
The outside air is uniformly introduced into each battery 8 and is discharged outside by the suction fan 13 described above.

Floor tunnel portion T of the floor panel 1
The main contactor 20 is disposed inside the vehicle and near the front end of the floor tunnel portion T. Incidentally, FIG.
Inside, 21 shows a dash lower panel.

A harness 22 is connected to the entire surface of the main contactor 20 as shown in FIG. 2, and the harness 22 is connected to the power head 16 at the front of the vehicle. Here, the harness 22 is routed under the branch portion 17 of the duct 14.

On the front surface of the main contactor 20, a pair of other harnesses 23 are connected downward, and the harnesses 23 reach the battery frame 2 and are connected to the battery 8. Here, the harness 23 extending from the main contactor 20 to the battery frame 2 is provided with a connector 24 capable of separating the harness 23 near the branch portion 17 of the duct 14.

In FIG. 4, 25 is a heater hose, 26 is a cooler hose, and 27 is a steering intermediate shaft.

According to the structure of the above-described embodiment, the main contactor 20 is arranged in the floor tunnel portion T at the substantially central portion in the vehicle width direction and near the front end of the floor tunnel portion T. 8, the main contactor 20 is located between the two, and therefore the harnesses 22, 2 for connecting to the power head 16 and the battery 8 are connected.
There is a merit that 3 is short. In particular, since the harnesses 22 and 23 are projected from the front surface of the main contactor 20, the wiring of the harnesses 22 and 23 is easy.

Further, the duct 14 has a branch portion 17
Since it is divided into two, the outside air taken in from the front can be dispersed and introduced into the battery frame 2. In particular, since the guide member 19 is provided at the inlet 18 of the floor panel 1, it is possible to uniformly supply the outside air to each row of the batteries 8 and efficiently cool the batteries 8.

The outlet 12 at the rear end of the floor panel 1
Since the suction fan 13 is provided in the vehicle, it is advantageous in that the battery 8 can be cooled even when the traveling outside air is not introduced from the front end of the duct 14 as during idling.

Then, from the main contactor 20 to the power head 16 or the battery frame 2, the harness 22,
When wiring 23, since a working space can be secured in front of the main contactor 20 below the branch portion 17 of the duct 14, there is an advantage that the wiring work of the harnesses 22 and 23 becomes easy.

When the battery is replaced, the battery frame 2 can be easily lowered by removing the bolt / nut BN to remove the battery frame 2 from the floor panel 1 and separating the harness 23 by the connector 24. Can be made.

In this case, the work for removing the connector 24 can be easily performed by utilizing the work space below the branch portion 17 of the duct 14. Therefore, the battery 8 can be easily replaced.

In the above embodiment, an example in which the battery is cooled is shown, but the present invention is not limited to the above embodiment. For example, a heater is provided in the duct 14 and heated air is introduced so that the battery 8 is discharged. May be heated. Also,
The duct 14 may be detachably attached to the battery frame 2. Further, the outlet 12 may be provided on the battery frame 2 side.

[0028]

As described above, according to the present invention, since the main contactor is arranged inside the floor tunnel and near the front end of the floor tunnel, the main contactor is located between the drive unit at the front of the vehicle body and the battery. Therefore, the harness to be connected to the battery and the drive unit can be short, and the connection work can be easily performed.

Further, since the duct is divided into two at the branch portion and attached to the inlets provided on the left and right of the front end of the battery frame, the air taken in from the front can be dispersed and introduced into the battery frame. Therefore, the temperature of the battery can be efficiently adjusted.

Since the working space can be secured in front of the main contactor by the branch portion of the duct, there is an advantage that the wiring work of the harness is facilitated.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is an explanatory side view of the same.

FIG. 3 is an explanatory view of the same plane.

FIG. 4 is a front explanatory view of the same.

[Explanation of symbols]

 1 ... Floor panel 2 ... Battery frame 12 ... Exit 14 ... Duct 15 ... Motor (driving part) 16 ... Power head (driving part) 17 ... Branching part 18 ... Inlet 22 ... Harness 23 ... Harness 24 ... Connector

Claims (1)

[Claims] 1. A battery temperature controller for an electric vehicle in which a battery frame divided from a floor panel of a vehicle body is detachably attached to the floor panel,
A duct that opens at the front of the vehicle body is provided, and this duct is branched at the front of the floor panel to provide a branch portion, and each branch end is attached to the inlets provided on the left and right of the front end portion of the floor panel, An outlet is provided at the rear end of the frame or floor panel, and a main contactor is arranged at the rear end of the duct near the front end of the floor tunnel behind the branch of the duct. A battery temperature controller for an electric vehicle, wherein a harness is routed to a front end portion, and the harness to the battery frame is separable by a connector.