JPH05246252A - Battery fixing structure of electric vehicle - Google Patents

Abstract

PURPOSE:To absorb collision energy acting on the car body, by operating by sensing the deformation of a front side member which is deformed in order to reduce the shock at collision, and by loading a battery. CONSTITUTION:A holder in which guide grooves are formed along the car length direction is fixed to the lower side of the body of an electric vehicle, and a bracket 14 fixed to a battery carrier 12 is hooked to the guide grooves. On the upper side of the battery carrier 12, a wire guide 46 bent to the front side of a car body B is provided, and a wire 48 fixed to the front side of a front side member 54 is hung to the wire guide 46 so as to restrict the carrier 12 to the lower side of the car body B. When the car collides, the front side member 54 is deformed, the wire 48 is loosened, and the carrier 12 is released from the restricting condition. As a result, the carrier moves to the front side of the car body, an energy absorbing guide 40 bends an energy absorbing plate in order, and the kinetic energy of the battery is absorbed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vehicle battery fixing structure for fixing a battery to a lower portion of a body of an electric vehicle.

[0002]

2. Description of the Related Art As a pollution-free vehicle with no exhaust gas or noise,
Electric vehicles are being researched and developed.

In most of the electric vehicles, a DC motor and a battery are used as a power source, and the battery is usually housed in a battery carrier, and the battery carrier is fixed to the lower part of the vehicle body by a bolt or the like (special feature). Kaisho 6
0-146724).

By the way, generally, in order to reduce the impact force at the time of a collision, an automobile is designed to absorb the collision energy while deforming the front side members and the like.

However, since an electric vehicle equipped with a battery has a larger vehicle body weight than an ordinary vehicle, it is necessary to increase the strength of the front side member and the like in order to absorb the collision energy. Furthermore, the body weight was increased.

Therefore, when an electric vehicle collides, various measures are taken in order to absorb the increased amount of collision energy acting on the vehicle body due to the increased weight due to the mounting of the battery.

For example, due to collision energy, the shear pin connecting the battery carrier and the vehicle body is broken, the connection state between the vehicle body and the battery carrier is released, and the battery carrier is dropped onto the ground, so that the kinetic energy of the battery is transferred to the vehicle body. Something that does not work, or by connecting the battery carrier and the vehicle body with a predetermined tightening torque,
When the kinetic energy of the battery becomes larger than the frictional force generated by the tightening torque, the battery carrier is moved in the front direction of the vehicle body, and the kinetic energy of the battery is absorbed by the collision with the energy absorbing member.

However, in any of the techniques, the structure is such that it does not operate unless a predetermined inertial force acts on the electric vehicle. Therefore, advanced production control techniques such as the accuracy of the shear pin and the setting of the tightening torque are required. ..

[0009]

SUMMARY OF THE INVENTION In consideration of such a fact, the present invention senses the deformation of the front side member which is deformed in order to reduce the impact force at the time of a collision, operates, and is equipped with a battery. It is an object of the present invention to provide a battery fixing structure for an electric vehicle that absorbs the increased amount of collision energy that acts on the battery.

[0010]

A battery fixing structure for an electric vehicle according to the present invention is a battery fixing structure for an electric vehicle, wherein a battery is fixed to a lower portion of a vehicle body of the electric vehicle.
A support body fixed to the lower part of the vehicle body and having a guide groove formed along the vehicle length direction, a bracket provided in a battery carrier for storing the battery and hooked in the guide groove, and one end of the vehicle body front portion. The restraint means restrains the movement of the bracket fixed and hooked in the guide groove, and relaxes when the front portion of the vehicle body collides to release the restraint state.

[0011]

In the battery fixing structure for the electric vehicle having the above structure, the support is fixed to the lower portion of the body of the electric vehicle.
A guide groove is formed in the support along the vehicle length direction. A bracket provided on the battery carrier is locked in the guide groove, and the movement of the bracket is restricted by the restricting means.

When an electric vehicle collides, the front side member at the front of the vehicle body is deformed. At this time, the restraint means, one end of which is fixed to the front portion of the vehicle body, relaxes to release the restraint state. As a result, the bracket released from the restrained state moves to the front of the vehicle body along the guide groove. Here, for example, by providing an energy absorption guide on the battery carrier and sliding the energy absorption guide and a bendable energy absorption plate whose one end is fixed to the vehicle body, the energy absorption plate is sequentially bent, The kinetic energy of the battery is converted into deformation energy of the energy absorbing plate and absorbed and absorbed.

[0013]

1 shows a state in which a battery is fixed to a lower portion of a vehicle body B by a battery fixing structure for an electric vehicle according to the present invention.

As shown in FIG. 2, the battery carrier 12
Is a rectangular box with an open top, in which a battery 10 as a power source of the electric vehicle is stored.
A bracket 14 having a horizontal portion 16 extending in the vehicle width direction is fixed to the side surface 12A of the battery carrier 12. The horizontal portion 16 is formed with a notch 18 that is cut open toward the rear of the vehicle body B. As shown in FIG.
The horizontal portion 16 left uncut by the notch 18 is hooked on a guide groove 22 formed on a side surface of the rectangular support 20 on the vehicle width direction side. This guide groove 2
2 is formed along the vehicle length direction, and the bracket 14 that is hooked can be pulled out to the front of the vehicle body B (direction of arrow A).

A through hole 30 is formed in the center of the support 20. As shown in FIGS. 3 and 4, a bolt 32 is inserted into the through hole 30 from below the vehicle body B,
It is fastened to a weld nut welded to a locker (not shown). Thereby, the battery carrier 12
The rocker 34 is supported via the support 20 and the bracket 14. Further, the bolt 32 is inserted into a mounting hole 39 formed at the end of a plastically deformable thin plate-shaped energy absorbing plate 38. As a result, the end of the energy absorbing plate 38 is fixed to the rocker.

On the other hand, as shown in FIG. 2, on the side surface 12A of the battery carrier 12, an energy absorption guide 40 formed by bending a steel rod into two and having a substantially U shape is provided from the fixing position of the energy absorption plate 38. It is fixed to the front side of the vehicle body B. As shown in FIG. 3, in the energy absorption guide 40, upper and lower support parts 40A and 40B are parallel to each other, and the upper support part 40A is located rearward of the vehicle body B from the lower support part 40B. It is installed in. Support part 40A above the energy absorption guide 40 and support part 4 below
The energy absorbing plate 38 is inserted into the gap with the outer peripheral surface of the upper and lower supporting portions 40A and 40B while being in contact with the outer peripheral surfaces thereof.

Further, as shown in FIG. 2, both ends of the support plate 44 are fixed to the side plates 12A of the battery carrier 12 so as to cover a part of the opening of the battery carrier 12. A wire guide 46 made of a channel material curved forward of the vehicle body is detachably fixed to the upper surface of the support plate 44. A wire 48 is wound around the opening of the wire guide 46, as shown in FIG.

As shown in FIG. 4, the wire guide 4
The end portion of the wire 48 hung around 6 is inserted into an eye guide 52 formed on the side surface of the underwear reinforcement 50, and is fixed to the front portion of the front side member 54.

Here, the mounting structure of the wire 48 will be described in detail. As shown in FIG. 4, the front side member 5
An adjust plate 56 is fixed to the front portion of the vehicle of No. 4. A through hole is formed in the adjust plate 56, and a weld nut (not shown) is welded to the rear side of the vehicle body. The weld nut includes a turnbuckle 60 disposed inside the front side member 54.
The threaded portion 60A is screwed. The tip of the threaded portion 60A is tightened with a lock nut 62 from the outer surface of the adjust plate 56. Also, turnbuckle 60
The end portion of the wire 48 is connected to the buckle portion 60 </ b> B by the pin 64.

The wire 48 is provided with wire guides 66, 6 provided inside the under-reinforcement 50.
8 and is inserted through the eye guide 52 to the outside of the under-reinforcement 50. Where wire 4
As shown in FIG. 1, the wire guide 8 is passed over the wire guide 46, and is inserted into the eye guide 52 formed in the side portion of the other underwear reinforcement 50. It is guided by 66 and 68 (see FIG. 4) and is connected to a turnbuckle 60 provided at the tip of the front side member 54. by this,
The wire 48 is given a constant tension by the turnbuckle 60, and restrains the battery carrier 12 to the vehicle body side.

Next, the operation of the battery fixing structure for the electric vehicle according to this embodiment will be described. The electric car suddenly stopped,
Even if the inertial force acts on the battery 10, the battery carrier 12 is not separated from the vehicle body because it is restrained by the wire 48.

Here, when the electric vehicle collides, the front side member 54 is crushed (three-dot chain line shown in FIG. 4) and the tension of the wire 48 is released. When the restrained state by the wire 48 is released, the bracket 14 hooked in the guide groove 22 shown in FIG. 3 absorbs the kinetic energy held until immediately before the collision, so that the bracket 14 is guided along the vehicle body along the guide groove 22. Move forward.

At this time, the side surface 12 of the battery carrier 12
The upper and lower support portions 40A and 40B of the energy absorption guide 40 fixed to A are slid on both sides of the energy absorption plate 38 fixed at the rocker 34 at one end, and the energy absorption plate 38 is sequentially bent, so that the vehicle body B Move ahead of. As a result, the kinetic energy of the battery carrier 12 is converted into deformation energy that deforms the energy absorption plate 38, and is absorbed and absorbed.

As described above, in the electric vehicle fixing structure according to the present invention, the battery carrier 1 restrained by the vehicle body B by the deformation of the front side member 54 at the front portion of the vehicle body.
Since 2 can be moved, it is not necessary to strictly control the precision of production technology as compared with the conventional structure that operates by sensing a predetermined kinetic energy.

In the embodiment, the battery fixing structure of the electric vehicle provided with the energy absorbing plate 38 is used.
The energy absorption plate 38 may not be provided, and the battery carrier 12 may be detached from the vehicle body at the time of a collision so that the kinetic energy of the battery does not act on the vehicle body.

In the present embodiment, the wire 4 is used as a means for restraining the hooking state between the support 20 and the bracket 14.
8 is used, but the present invention is not limited to this, and a tension spring whose one end is fixed to the front side member 54 is used.
The hooked state of 0 and the bracket 14 may be restricted.

[0027]

In the battery fixing structure for an electric vehicle according to the present invention, the battery carrier restrained by the vehicle body can be moved by the deformation of the front side member at the front portion of the vehicle body. It is not necessary to strictly control the precision of production technology control, as compared with the structure that operates by sensing.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a battery fixing structure for an electric vehicle according to the present invention is applied and a battery is attached to a lower portion of a vehicle body.

FIG. 2 is a perspective view showing a battery carrier of a battery fixing structure for an electric vehicle according to the present invention.

FIG. 3 is a partial perspective view showing a support structure for a battery carrier of a battery fixing structure for an electric vehicle according to the present invention.

FIG. 4 is a perspective view showing details of restraint means of a battery fixing structure for an electric vehicle according to the present invention.

[Explanation of symbols]

 12 Battery Carrier 14 Bracket 20 Support 46 Wire Guide (Restriction Means) 48 Wire (Restriction Means)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Keiji Kunikita 7-71 Funakoshi, Yokosuka City, Kanagawa Prefecture

Claims (1)

[Claims] 1. A battery fixing structure for an electric vehicle, wherein a battery is fixed to a lower portion of a vehicle body of the electric vehicle, and a support body fixed to the lower portion of the vehicle body and having a guide groove formed along a vehicle length direction and the battery are stored. The bracket provided on the battery carrier and locked to the guide groove and the bracket fixed to the front part of the vehicle body at one end are restrained from moving, and are loosened when the front part of the vehicle body collides. A restraint means for releasing the restraint state, and a battery fixing structure for an electric vehicle, comprising: