JPH10109548A - Battery fitting structure for electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate loading and wiring works for batteries by arranging respective two battery groups divided into the front and the rear, in a space under a rear floor in such a state as sandwiching a rear axle shaft between them. SOLUTION: Batteries 2 are divided into two groups, the front and the rear, and the respective battery groups 3, 4 are arranged in a space under a rear floor 5 in such a state as sandwiching a rear axle shaft 7 between them. After being mounted on a receiver part 10, the front battery group 3 is fastened by stud bolts 13 and nuts 27 for a flange 11 which are fitted into bolt insertion holes 26 for a flange 25 so as to be fitted to the car body. After being mounted on a box part, the rear battery group 4 is covered with a lid part using a flange of the box part and fitted to the car body using the stud bolts and nuts. The both battery groups 3, 4 are thus fitted to by using the stud bolts which are fitted to the car body side beforehand so that the positioning of the battery groups 3, 4 are facilitated and the fitting work can be executed quickly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery mounting structure for an electric vehicle, and more particularly, to a battery mounting structure for an electric vehicle in which a battery is provided at a rear portion of the electric vehicle.

[0002]

2. Description of the Related Art Conventionally, various methods have been proposed for attaching a battery of an electric vehicle and for routing a cable thereof. As a conventional method of mounting a battery, a tray is installed in a vehicle compartment, and a large number of batteries are fixed on the tray with a holder and placed in the vehicle compartment. As a conventional method of routing a battery cable, a battery is placed on the tray one by one to perform wiring work in the vehicle interior, and then pass through the front seat from the vehicle interior to the engine room (outside the vehicle interior).
I was going to go out.

[0003]

However, in the conventional battery mounting structure, since the battery mounted on the electric vehicle is quite heavy, the loading operation is not easy, and the loading operation is troublesome. . This is the same when replacing the battery.

[0004] In addition, since the wiring work of the battery in the vehicle compartment is performed in a narrow place, the wiring work becomes difficult.
It was troublesome. Furthermore, in the conventional battery mounting structure,
Since the high-voltage cable from the battery is routed so as to pass through the cabin, there is a possibility that the in-vehicle device may malfunction. For this reason, it is necessary to take noise countermeasures for the signal lines of those devices.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and enables a battery mounting operation and a wiring operation thereof to be easily performed, and a battery mounting method for an electric vehicle capable of taking measures against noise in the battery wiring. The purpose is to provide a structure.

[0006]

In order to achieve the above object, according to the present invention, in a battery mounting structure for an electric vehicle in which a battery is disposed at a rear portion of the electric vehicle, the battery is divided into two groups, front and rear. The battery groups of each group are arranged in a space below the rear floor so as to sandwich the rear axle shaft.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a battery mounting structure for an electric vehicle according to the present invention will be described below in detail with reference to the accompanying drawings. 1 to 8 show an embodiment of a battery mounting structure for an electric vehicle according to the present invention.

In the battery mounting structure of the present embodiment, a battery 2 is disposed at the rear of a monocoque type electric vehicle 1.
The battery groups 3 and 4 of each group are arranged in the space 6 below the rear floor 5 so as to sandwich the rear axle shaft 7. The space 6 is where a gasoline tank is conventionally provided (see FIGS. 1 and 2).

Here, the front battery group 3 of the group arranged in front of the rear axle shaft 7 is housed in a battery box 8. The battery box 8 is formed by being divided into an upper frame portion 9 and a substantially dish-shaped receiving portion 10. A first flange 11 is provided around a lower portion of the frame portion 9. A plurality of nuts 12 are welded to the first flange 11, and a plurality of stud bolts 13 are provided on the lower surface of the first flange by being fastened to the nut 12 (see FIG. 3 and FIG. 3). (See FIG. 4).

Further, a pipe frame 14 is provided around the frame 9. The pipe frame 14 is formed in a substantially rectangular frame by a front frame element 15, side frame elements 16, 16 and a rear frame element 17. At both ends of the front frame element 15, a bracket 1
8, 18 (only one is shown) are provided (see FIG. 5). The frame elements 19, 19 bent into a substantially L-shape are located slightly rearward of the frame elements 16, 16 on both sides.
(Only one is shown) is provided (see FIG. 5). Each of the frame elements 19, 19 is arranged such that it initially faces upwards and finally faces the side of the vehicle. Brackets 20, 2 are provided at the ends of the frame elements 19, 19, respectively.
0 is attached (see FIGS. 3 and 5). A substantially inverted U-shaped frame element 21 is fixed to the rear frame element 17. The central portion of the frame element 21 is formed in a straight line, and a substantially U-shaped bracket 22 is attached.

The frame 9 of the battery box 8 is attached to the lower part of the vehicle body in advance as follows. That is, the brackets 18, 18, 20, 20 of the frame portion 9 are connected to the rear floor side members 23 arranged on both lower sides of the rear floor 5.
To the bracket 22 and the frame 9
Of the rear wall 5 is welded to a predetermined position on the lower surface of the rear floor 5. Thereby, the frame 9 of the battery box 8 is fixed to the lower part of the vehicle body via the pipe frame 14.

On the other hand, a second flange 25 is provided around the receiving portion 10 of the battery box 8. The second flange 25 has a stud bolt 1 disposed on the frame 9.
A plurality of bolt insertion holes 26 corresponding to No. 3 are formed (see FIG. 3).

The front battery group 3 is mounted on the vehicle body as follows. That is, first, after the battery group 3 is placed on the receiving portion 10, the stud bolts 13 of the flange 11 of the frame portion 9 are aligned with the bolt insertion holes 26 of the flange 25 of the receiving portion, and the nuts 27 are fastened to each. I do. Thereby, the receiving part 10 is fixed to the frame part 9 and the front battery group 3 is attached to the vehicle body from below the vehicle body. 3 to 5, reference numeral 28 denotes an insulating plate provided above the front battery group 3.

In this embodiment, the above-mentioned structure allows the front battery group 3 to be easily mounted on the vehicle body after the front battery group 3 is replaced outside the vehicle. Since the mounting of the front battery group is performed using the pipe frame 14, a large hanging strength can be obtained unlike the case of the method of hanging a gasoline tank. Further, in the present embodiment, an escape space 30 through which the brake pipe 29 passes is formed between the front battery group 3 and the brackets 20, 20 by the substantially L-shaped frame elements 19, 19.

Further, in this embodiment, a junction box 32 is disposed in the floor tunnel 31 of the vehicle body and in front of the frame portion 9 (FIGS. 1 and 6).
reference). At the same time, a window 33 is formed in the front wall of the frame 9 so as to open to the floor tunnel 31, and the front battery group 3 and the junction box 32 are connected through the window (FIG. 6B). reference). At this time, window 3
A window is also formed in the upright wall of the rear floor 5 corresponding to 3.

As described above, the electrical connection between the front battery group 3 and the junction box 32 is made in the floor tunnel 31, so that the following effects can be obtained. That is, as shown in FIG. 6A, when the electric connection between the front battery group 3 and the junction box 32 is made below the rear floor 5 below the floor tunnel 31. However, the connection cable 34 is exposed below the vehicle body and is easily damaged. On the other hand, in this embodiment, since the connection cable 34 is not exposed below the vehicle body, the connection cable and the connection portion 35 between the connection cable and the front battery group 3 can be protected. .

The rear battery group 4 of the group disposed behind the rear axle shaft 7 is housed in a battery box 36. The battery box 36 is formed separately from a box portion 37 and a lid portion 38 (see FIGS. 2 and 7). The box portion 38 is formed so as to be opened upward and forward, and the flange 3 extends over the periphery of the opening.
9 are formed. Brackets 40, 41, 41 each having a bolt insertion hole are provided on the upper portion of the box portion 38. The bracket 40 is provided at the center of the box 38. The brackets 41, 41 are fixed to both ends of pipe frames 42, 42 bent in a substantially U shape. The pipe frames 42, 42 are fixed from the lower surface of the box portion 38 to both side surfaces, whereby the brackets 41, 41 are located on both sides of the box portion 38.

The lid 38 of the battery box 36 is formed to be bent in a substantially L-shaped cross section. On the other hand, a plurality of substantially U-shaped brackets 43, 44, 44 are arranged at appropriate positions on the lower surface of the rear floor 5 behind the rear axle shaft 7. These brackets 43, 44, 44
, A stud bolt (not shown) is disposed downward.

The rear battery group 4 is mounted on the vehicle body as follows. That is, first, after the battery group 4 is placed on the box portion 37, the lid portion 38 is attached to the box portion 37 using the flange 39 of the box portion to cover the rear battery group 4. Next, the stud bolts of the brackets 43, 44, 44 on the vehicle body side are respectively aligned with the bolt insertion holes of the brackets 40, 41, 41 of the box portion, and fastened and fixed using nuts (not shown). Thereby, the rear battery group 4 is attached to the vehicle body from below the vehicle body.

In this embodiment, both battery groups 3 and 4
Since the battery group is mounted by using the stud bolt previously mounted on the vehicle body side, the positioning of the battery group is easy, and the mounting thereof can be performed quickly.

Further, in the present embodiment, the connection portion 45 of the rear battery group 4 for connecting to the front battery group 3 is provided.
45 is concentrated on a position on one side that does not interfere with the lateral rod brace 46 (see FIGS. 8B and 8C). As described above, the following effects can be obtained by concentrating the connection portion 45 of the rear battery group 4 on one side. That is, as shown in FIG. 8A, when the connecting portions 45 of the rear battery group 4 are located on both sides, one connecting portion 45 interferes with the lateral rod brace 46. A notch 48 was formed in the rear skirt panel 47 in order to escape from the vehicle.

In the present embodiment, the connecting portions 45, 45 of the rear battery group 4 are concentrated on one side not interfering with the lateral rod brace 46, so that the notch 48 is eliminated and the lateral rod The front battery group 3 and the rear battery group 4 without being disturbed by the brace 46
The connection work with can be easily performed.

In FIGS. 1 and 2, 49 motors, 50 is a motor control device, 51 is a cable connecting the control device 50 and the junction box 32, 52
Is a handle, 53 is a front wheel, 54 is a rear wheel, 55 is a rear bumper, and in FIG. 8, 56 is a lateral rod.

[0024]

As described above, according to the battery mounting structure for an electric vehicle according to the present invention, in the battery mounting structure for an electric vehicle in which a battery is disposed at the rear portion of the electric vehicle, the battery is mounted in two groups. Divided into
Since the battery groups of each group are arranged so as to sandwich the rear axle shaft in the space below the rear floor, the following effects can be obtained.

That is, according to the present invention, the battery can be attached to the vehicle having the monocoque body from below by using the space of the conventional gasoline tank by using the space of the conventional gasoline tank. Is minimal and easy to implement. In addition, since there is no need to load the battery into the vehicle as in the case of the conventional vehicle, the battery wiring work can be easily performed in a wide place away from the vehicle body, and the battery can be mounted using a table lift or a tool. Work and replacement work can be performed quickly.

In the present invention, since the batteries are separately mounted in the front battery group and the rear battery group, the space around the rear axle shaft can be effectively utilized. Moreover, since the attachment of the front battery group is performed using the pipe frame, a large suspension strength can be obtained unlike the conventional method of suspending a gasoline tank.

Further, in the present invention, since the high-voltage cable from the battery is routed in the floor tunnel, it is possible to prevent noise from entering the signal line of the vehicle-mounted device. In addition, since the connection between the front battery group and the junction box is made in the floor tunnel, the connection cable is not exposed below the vehicle body, so that the connection cable and the connection cable and the front battery group are connected to each other. The connection can be protected.

Further, in the present invention, the battery is mounted on the vehicle body by matching the bolt insertion hole with the stud bolt previously mounted on the vehicle body side, so that the positioning of the battery is easy, and the mounting of those batteries is easy. Can be done quickly. In addition, in the present invention, since the connection portion of the rear battery group for connecting to the front battery group is concentrated on one side that does not interfere with the lateral rod brace, the front portion is not disturbed by the lateral rod brace. Connection work between the side battery group and the rear battery group can be easily performed.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing one embodiment of a battery mounting structure for an electric vehicle according to the present invention.

FIG. 2 is an exploded perspective view showing a main part of one embodiment of a battery mounting structure for an electric vehicle according to the present invention.

FIG. 3 is an exploded perspective view showing a battery box of a front battery group in one embodiment of the battery mounting structure for an electric vehicle according to the present invention.

FIG. 4 is a cross-sectional view showing a main part of a mounting structure for a front battery group in one embodiment of a battery mounting structure for an electric vehicle according to the present invention.

FIG. 5 is a cross-sectional view illustrating a main part of a mounting structure for a front battery group in an embodiment of a battery mounting structure for an electric vehicle according to the present invention.

FIGS. 6A and 6B are cross-sectional views showing a state in which a front battery group and a junction box are electrically connected. FIG. 6A shows a conventional example, and FIG. b) shows an embodiment of the battery mounting structure for an electric vehicle according to the present invention.

FIG. 7 is an exploded perspective view showing a battery box of a rear battery group in one embodiment of the battery mounting structure for an electric vehicle according to the present invention.

FIGS. 8A and 8B are cross-sectional views showing a relationship between a connection portion of a rear battery group and a lateral rod brace, and FIG. 8A shows a conventional example, and FIG. b) shows an embodiment of the battery mounting structure for an electric vehicle according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric vehicle 2 Battery 3 Front battery group 4 Rear battery group 5 Rear floor 6 Space 7 Rear axle shaft 8 Battery box 9 Frame section 10 Receiving section 11 First flange 12 Weld nut 13 Stud bolt 14 Pipe frame 15 Front frame element 16 Side frame element 17 Rear frame element 18 Bracket 19 Frame element 20 Bracket 21 Frame element 22 Bracket 23 Rear floor side member 24 Mounting part 25 Second flange 26 Bolt insertion hole 27 Nut 28 Insulating plate 29 Brake pipe 30 Escape space 31 Floor tunnel 32 Junction Box 33 Window 34 Connection Cable 35 Connection 36 Battery Box 37 Box 38 Cover 39 Flange 40, 41 Bracket 42 Pipe Frame Arm 43, 44 bracket 45 connecting portion 46 lateral rod brace 47 Rear skirt panel 48 notch

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[Procedure amendment]

[Submission date] December 3, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing one embodiment of a battery mounting structure for an electric vehicle according to the present invention.

FIG. 2 is an exploded perspective view showing a main part of one embodiment of a battery mounting structure for an electric vehicle according to the present invention.

FIG. 3 is an exploded perspective view showing a battery box of a front battery group in one embodiment of the battery mounting structure for an electric vehicle according to the present invention.

FIG. 4 is a cross-sectional view showing a main part of a mounting structure for a front battery group in one embodiment of a battery mounting structure for an electric vehicle according to the present invention.

FIG. 5 is a cross-sectional view illustrating a main part of a mounting structure for a front battery group in an embodiment of a battery mounting structure for an electric vehicle according to the present invention.

FIGS. 6A and 6B are cross-sectional views showing a state in which a front battery group and a junction box are electrically connected. FIG. 6A shows a conventional example, and FIG. b) shows an embodiment of the battery mounting structure for an electric vehicle according to the present invention.

FIG. 7 is an exploded perspective view showing a battery box of a rear battery group in one embodiment of the battery mounting structure for an electric vehicle according to the present invention.

8 (a), 8 (b) and 8 (c) show a relationship between a connection portion of a rear battery group and a lateral rod brace, and FIG. 8 (a) is a sectional view showing a conventional example. 1 (b) and 1 (c) are cross-sectional views showing an embodiment of a battery mounting structure for an electric vehicle according to the present invention.

[Description of Signs] 1 Electric vehicle 2 Battery 3 Front battery group 4 Rear battery group 5 Rear floor 6 Space 7 Rear axle shaft 8 Battery box 9 Frame part 10 Receiving part 11 First flange 12 Weld nut 13 Stud bolt 14 Pipe frame Reference Signs List 15 front frame element 16 side frame element 17 rear frame element 18 bracket 19 frame element 20 bracket 21 frame element 22 bracket 23 rear floor side member 24 mounting portion 25 second flange 26 bolt insertion hole 27 nut 28 insulating plate 29 brake pipe 30 Escape space 31 Floor tunnel 32 Junction box 33 Window 34 Connection cable 35 Connection 36 Battery box 37 Box 38 Cover 39 Flange 40, 41 Bracket 2 pipe frame 43 bracket 45 connecting portion 46 lateral rod brace 47 Rear skirt panel 48 notch

Claims (5)

[Claims] 1. A battery mounting structure for an electric vehicle in which a battery is disposed at a rear portion of the electric vehicle, the battery is divided into two groups, a front and a rear, and a group of batteries of each group is placed in a space below a rear floor in a rear axle. A battery mounting structure for an electric vehicle, wherein the battery mounting structure is arranged so as to sandwich a shaft. 2. A battery box accommodating a front battery group of a group arranged in front of the rear axle shaft in the battery group is formed separately into a frame portion and a receiving portion, and a battery box is formed at a lower portion of the frame portion. A first flange is provided, a plurality of studs are provided on a lower surface of the first flange, and a pipe frame is attached around the frame, and the frame is attached to a lower part of the vehicle body via the pipe frame. On the other hand, a second flange is provided around the receiving portion, and a plurality of bolt insertion holes corresponding to the stud bolts are formed in the second flange. After placing the group, the nut is fastened by aligning the stud bolt of the flange of the frame portion with the bolt insertion hole of the first flange of the receiving portion,
2. The battery mounting structure for an electric vehicle according to claim 1, wherein the front battery group is mounted on the vehicle body from below the vehicle body while fixing the receiving portion to the frame portion. 3. 3. A junction box is disposed in a floor tunnel of a vehicle body and in front of the frame, and a window is formed in a front wall of the frame so as to open to the floor tunnel. The battery mounting structure for an electric vehicle according to claim 2, wherein the front battery group and the junction box are connected through the window. 4. A battery box accommodating a rear battery group of a group arranged behind the rear axle shaft in the battery group is formed into a box part and a lid part, and the box part is formed in an upper part and a front part. And a bolt insertion hole is formed in the upper part of the box part. Further, the lid part is formed in a substantially L-shaped cross section, and a plurality of brackets are provided at appropriate positions on the lower part of the vehicle body behind the rear axle shaft. Are arranged, and stud bosses are arranged downward on these brackets. After that, the rear battery group is placed on the box, and then the lid is attached to the box, and the rear side is mounted. The rear battery group is attached to the vehicle body from below the vehicle body by covering the battery group and then fastening the nut by aligning the stud bolt of the bracket with the bolt insertion hole of the box portion. The battery mounting structure for an electric vehicle according to claim 1, wherein the battery mounting structure is provided. 5. The electric device according to claim 4, wherein a connection portion of the rear battery group for electrically connecting to the front battery group is concentrated at a position not interfering with the lateral rod brace. Vehicle battery mounting structure.