JP3001337B2 - Body structure of electric vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body structure of an electric vehicle in which a battery carrier for storing a battery is mounted on a vehicle body.

[0002]

2. Description of the Related Art As a pollution-free vehicle without exhaust gas and noise,
Electric vehicles are being researched and developed. This electric car is
In many cases, an AC motor or a DC motor and a battery are used as power sources. Usually, the battery is stored in a battery carrier, and the battery carrier is fixed to a lower part of a vehicle body with bolts or the like (Japanese Patent Application Laid-Open No. 60-1467).
No. 24).

In such an electric vehicle, an effective countermeasure using a rigid portion of the battery carrier is not considered at all for a collision from the side, and the collision is dealt with by improving the rigidity of the side of the vehicle body. Therefore, the body weight was increased.

[0004]

SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide a vehicle body structure of an electric vehicle having a rigidity capable of coping with a collision from the side without increasing the vehicle body weight. .

[0005]

According to the first aspect of the present invention,
A battery carrier on which the battery is mounted, and the battery
A transverse aggregate disposed on the terry carrier and extending in the vehicle width direction;
The battery carrier is located in the longitudinal direction of the transverse aggregate.
Fastening means for fastening both ends in the width direction to the rocker of the vehicle body,
Acting on the rocker from the side provided inside the rocker
And a bulkhead for transmitting a load to the horizontal aggregate .

According to the second aspect of the present invention, the horizontal aggregate is provided inside the intersection of the floor under member which intersects with the horizontal aggregate.
And a bulkhead that bears a load transmitted to the vehicle.

According to a third aspect of the invention, there is provided a vehicle body structure for an electric vehicle, wherein a rib extending in a vehicle width direction is provided on a separator that divides a battery case of the battery into a plurality of chambers.

[0008]

In the vehicle body structure of an electric vehicle according to the present invention, a horizontal aggregate extending in the vehicle width direction is provided on a battery carrier on which a battery is mounted. Both ends in the vehicle width direction of the battery carrier are fastened to the rocker of the vehicle body by fastening means located in the longitudinal direction of the horizontal aggregate. A bulkhead is provided inside the rocker, and transmits a load acting on the rocker from the side to the transverse aggregate. For this reason, the load acting on the rocker due to the collision from the side is transmitted to the horizontal aggregate through the bulkhead, so that the vehicle body has high rigidity against the collision from the side. Further, since a part of the load acting on the fastening means is also borne by the bulkhead, the fastening function of the battery carrier is guaranteed.

[0009] Further, by providing the bulkhead inside the portion of the floor under member that intersects with the horizontal aggregate, part of the load transmitted to the horizontal aggregate through the bulkhead inside the rocker can be partially reduced. Borne by the bulkhead provided in the For this reason, the rigidity of the bulkhead disposed inside the rocker can be reduced,
Also, the rigidity of the lateral aggregate can be reduced, so that the battery carrier can be reduced in weight.

[0010] Further, by providing ribs extending in the vehicle width direction on a battery separator provided with a partition surface extending along the vehicle width direction, a rigid member receiving the load due to a collision from the side of the battery itself. Thus, the rigidity of the bulkhead provided inside the rocker and the inside of the floor under member can be reduced.

[0011]

FIG. 1 shows a battery 1 mounted on a battery carrier 12 supported at the lower part of the body of an electric vehicle according to this embodiment.
0 is shown. The battery carrier 12 is disposed in a vehicle width direction and has a rectangular cross-section horizontal aggregate 14.
And a skeleton is formed by a vertical aggregate 16 having a rectangular cross section which is bridged across the horizontal member 14.

At both ends of the horizontal aggregate 14 and the vertical aggregate 16, a frame 18 having a substantially L-shaped cross section is welded to form a storage section, and a box-shaped battery tray 20 (see FIG. 2) is mounted.

The frame 18 has a flange 18A which projects in the horizontal direction. As shown in FIG. 3, the flange 18A arranged in the vehicle width direction is provided with an elongated hole 21 elongated in the vehicle length direction. A bolt 24 is inserted into the elongated hole 21 from below, and the bolt 24
Are fastened to a weld nut 28 welded to the inner plate 26A of the rocker 26, as shown in FIG. Further, at the fastening portion of the frame 18, a reinforce 30 is disposed, one of which is welded to the lower surface of the end of the horizontal aggregate 14, and the other of which rises toward the vertical piece 18B of the frame 18. A work hole 32 is formed on the lower surface of the reinforce 30 so that the bolt 24 can be attached. The rocker reinforcement 34 extends inside the rocker 26 along the longitudinal direction.

As shown in FIG. 3, an elongated hole 36 extending in the vehicle length direction is formed on the upper surface of the vertical aggregate 16 at a position where the horizontal aggregate 14 and the vertical aggregate 16 intersect. Has been established. Bolts 42 are inserted into the long holes 36 from working holes 38 and 40 provided on the upper and lower surfaces of the horizontal aggregate 14,
2 is fastened to a weld nut 48 welded to the lower surface of the under member bulkhead 46 disposed inside the floor under member 44, as shown in FIG.

In this way, when the front of the electric vehicle collides, the kinetic energy of the battery carrier 12, which tends to move forward due to inertial force, is reduced by the tightening force of the bolt 24 and the weld nut 28 and the bolt 42 and the weld nut 48. When the distance becomes larger, the battery carrier 12 slips, and the battery carrier 12 is separated from the vehicle body and moves forward.

As shown in FIGS. 1 and 2, the under member bulkhead 46 disposed inside the floor under member 44 has an upright wall 46A that partitions the floor under member 44 in the vehicle width direction. . Both ends of the standing wall 46A are welded to the inner wall of the floor under member 44, and a reinforcing bead 46B extends in the vehicle width direction. Thereby, the rigidity of the floor under member 44 against a collision from the side is increased.

On the other hand, a rocker bulkhead 50 is also provided at a portion of the rocker 26 that intersects with the horizontal aggregate 14 by partially cutting out the rocker reinforcement 34 disposed therein. The rocker bulkhead 50 is a hat-shaped member with a flange 50A formed at an end welded to the rocker inner 26A. As a result, the rocker 26 is partitioned in the vehicle width direction by the upright wall 50B of the rocker bulkhead 50, and the rigidity of the rocker 26 against a collision from the side is increased.

As shown in FIG. 4, the battery 10 in which the battery carrier 12 is mounted has a battery case 52 in which the inside of a battery case 52 is partitioned by a plurality of separators 54, and cells (not shown) are housed in the partitioned room. It is supposed to be. The battery case 52 is closed by a lid 58 provided with an electrode 56. In this separator 54,
A reinforcing rib 60 extending in the vehicle width direction is formed. Thus, by forming the reinforcing ribs 60 on the separator 54, the rigidity of the battery 10 itself against a collision from the side can be improved.

As described above, the rocker bulkhead 50, the under member bulkhead 46, and the reinforcing ribs 60 of the battery 10 are arranged on an extension of the horizontal aggregate 14, that is, in a straight line in the vehicle width direction. (See FIG. 2).

Here, how a load is transmitted when a collision object collides from the side with a vehicle body to which the vehicle body structure of the electric vehicle according to the present invention is applied will be described.

The load acting perpendicular to the rocker 26 due to the collision from the side is transmitted from the rocker outer 26B to the rocker inner 26A and the fastening bolt 24 through the rocker bulkhead 50, and transmitted to the horizontal aggregate 14.
Since the horizontal aggregate 14 is arranged in the vehicle width direction and serves as a resistance member for a load acting from the side, the vehicle body has high rigidity against a collision from the side.

Further, since the under member bulkhead 46 is provided inside the floor under member 44 that intersects the horizontal aggregate 14, the load transmitted to the horizontal aggregate 14 is reduced. 46 in part. For this reason, the rigidity of the rocker bulkhead 50 can be reduced, and the rigidity of the lateral aggregate 14 can also be reduced, so that the weight of the battery carrier 12 can be reduced.

Furthermore, since the separator 54 of the battery 10 is provided with a reinforcing rib 60 extending in the vehicle width direction, the battery 10 itself becomes a rigid member which receives a load due to a collision from the side, and the rocker bulkhead The rigidity of the under member 50 and the under member bulkhead 46 can be reduced.

In this embodiment, the rocker bulkhead 50, the under member bulkhead 46, and the reinforcing rib 6
Although the description has been given of the vehicle body structure provided with 0, it is a matter of course that even if any one is adopted, the rigidity of the vehicle body can be improved against a collision from the side.

[0025]

The vehicle body structure of the electric vehicle according to the present invention comprises:
With the above configuration, without increasing the body weight,
The rigidity of the vehicle body can be improved with respect to a collision from the side.

[Brief description of the drawings]

FIG. 1 is a partial perspective view of a vehicle body structure of an electric vehicle according to the present invention.

FIG. 2 is a sectional view of the vehicle body structure of the electric vehicle according to the present invention as viewed from a vehicle length direction.

FIG. 3 is a perspective view showing a partial skeleton of a battery carrier having a vehicle body structure of an electric vehicle according to the present invention.

FIG. 4 is a perspective view showing a structure of a battery having a body structure of the electric vehicle according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Battery 12 Battery carrier 46 Under member bulkhead (bulkhead) 50 Rocker bulkhead (bulkhead) 60 Reinforcement rib (rib)

Continuation of the front page (72) Inventor Keiji Kunikita No address at Taura Port Town, Yokosuka City, Kanagawa Prefecture Inside Kanto Auto Works, Ltd. (56) References JP-A-3-193568 (JP, A) JP-A-4-266576 (JP , A) Japanese Utility Model Application Hei 4-45185 (JP, U) Japanese Utility Model Application Showa 63-199883 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B62D 25/20

Claims (3)

(57) [Claims] 1. A battery carrier for mounting a battery,
A transverse bone disposed on the battery carrier and extending in a vehicle width direction;
And the battery cap positioned in the longitudinal direction of the horizontal aggregate.
Fastening of both ends in the width direction of the rear to the body rocker
Means, provided inside the rocker, from the side to the rocker.
A bulkhead transmitting an acting load to the transverse aggregate;
A body structure of an electric vehicle, comprising: 2. A load transmitted to the horizontal aggregate is borne inside an intersection of the floor under member intersecting with the horizontal aggregate.
The body structure of an electric vehicle according to claim 1, further comprising a bulkhead . 3. The vehicle body structure of an electric vehicle according to claim 1, wherein a rib extending in a vehicle width direction is provided on a separate that divides the battery case of the battery into a plurality of chambers. .