JPH1199832A - Battery mounting structure of electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery mounting structure of an electric vehicle which is capable of securing the strength of a battery cover and the support rigidity of a rear seat, and light in weight. SOLUTION: In an electric vehicle, a plurality of batteries 6 are mounted on a rear floor 4. A box-shaped battery cover 8 to cover the whole upper area of the batteries 6 is fixed to the rear floor 4, and a reinforcement 9 is continuously fixed to each side wall part and an upper surface part of an intermediate part in the longitudinal direction of a vehicle body of the battery cover 8. A rear seat 5 is arranged forward of a reinforcement 9 fixing part of the battery cover 8, and a rear end part of the rear seat 5 is mounted on the reinforcement 9.

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 (including a hybrid vehicle).

[0002]

2. Description of the Related Art Conventionally, lead-acid batteries and the like have been used as batteries for electric vehicles, but since these batteries have a limited amount of electric energy that can be stored by themselves, a plurality of batteries must be mounted. In this case, since a relatively large space is required to mount a plurality of batteries, the batteries are usually mounted on the rear floor in many cases.

[0003]

However, when a large number of batteries are mounted on the rear floor, there is a disadvantage that the space for arranging the rear seats is reduced and the occupant constant is reduced. When the battery is mounted on the rear floor, it is necessary to cover the battery with a battery cover in order to prevent a human body or the like from touching the electrodes of the battery. By arranging the rear seat on the battery cover, it is possible to increase the occupant constant, but for that purpose, the battery cover needs to be strong enough to withstand the weight of the occupant, which inevitably increases the weight of the battery cover. Will be.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a light-weight battery mounting structure for an electric vehicle that secures the strength of a battery cover and the rigidity of supporting a rear seat.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to an electric vehicle having a plurality of batteries mounted on a rear floor, and a box-shaped battery cover covering the entire upper surface of the battery on the rear floor. , The reinforcement is continuously fixed to both side walls and the upper surface of the intermediate portion of the battery cover in the front-rear direction of the vehicle body, and a rear seat is arranged on the front side of the reinforcement fixing portion of the battery cover, and a rear seat is provided. Is attached to the above-mentioned reinforcement.

When an occupant sits on the rear seat, the load acts on the box-shaped battery cover, and the middle portion of the vehicle body in the front-rear direction with the lowest strength is easily bent. However, since a gate-shaped reinforcement is fixed to an intermediate portion of the battery cover in the front-rear direction of the vehicle body, the load acting on the rear seat can be effectively supported, and deformation and bending of the battery cover can be prevented. For example, if a hat-shaped cross-section member is used as the reinforcement and the reinforcement is fixed to the battery cover, the cross-section rigidity can be greatly increased if a closed cross-section structure is adopted. In addition,
The portion where the reinforcement is fixed may be located between the front end and the rear end of the battery cover, and need not be the center in the vehicle longitudinal direction.

Further, if the seat belt anchor of the rear seat is attached to the reinforcement as described in claim 2, the reinforcement can reduce the three members of the reinforcing member of the battery cover, the attaching member of the rear seat, and the attaching member of the seat belt. As a result, an extremely small and lightweight reinforcing structure can be realized.

[0008]

1 to 3 show an example of an electric vehicle according to the present invention. In the figure, an electric motor 1 is mounted on a front part of a vehicle body, and a pair of left and right front seats 3 are arranged on a front floor 2 and a pair of left and right rear seats 5 are arranged on a rear floor 4.

The rear floor 4 is formed one step higher than the front floor 2, and the rear floor 4 is formed with a concave battery housing portion 7 for housing a plurality of batteries 6. The upper opening of the battery housing 7 is closed by a box-shaped battery cover 8 that covers the entire upper surface of the battery 6. The battery cover 8 is formed of a thin steel plate, and is detachably fixed to the rear floor 4 with bolts or the like. The rear seat 4 is mounted on the battery cover 8.

Reinforcements 9 having a hat-shaped cross section are continuously fixed to the outer surface of the battery cover 8 and to both side walls and an upper surface of an intermediate portion in the longitudinal direction of the vehicle body to form a closed cross section structure. I have. Therefore, the rigidity of the battery cover 8 can be significantly increased. An angle material 1 for reinforcement is provided on the inner surface of the front end of the battery cover 8.
0 is fixed.

The rear seat 4 is disposed on the front side of the reinforcement fixing portion of the battery cover 8, and a bracket 11 projecting from the rear end of the rear seat 4 is fastened to the reinforcement 9 by bolts 12. A bracket 13 hanging from the front end of the rear seat 4 is fastened to the angle member 10 by a bolt 14 via a battery cover 8.

An anchor bracket 15 is fixed at the center of the reinforcement 9 in the vehicle width direction by welding or the like, and left and right seat belt anchors 16 are attached to the anchor bracket 15. The inner belt 17 is inserted through the seat belt anchor 16,
A buckle 18 is attached to the tip of the inner belt 17.

The outer portion of the rear seat 4 has a battery cover 8
The protrusion protrudes outward in the vehicle width direction, and the lower surface of the protrusion is fixed to the rear floor 4 via reinforcing brackets 19 and 20. Since the outer portions of the rear seat 4 project outward from the battery cover 8 in the vehicle width direction, the reinforcing brackets 19 and 20 are added to support the load of the rear seat 4. In the case of a structure in which the whole area is supported by the battery cover 8, it is not always necessary. In order to support the lower surface of the front end of the rear seat 4 at the center in the vehicle width direction, another reinforcing metal fitting may be added.

In the battery mounting structure, the load of the occupant seated on the rear seat 4 acts on the battery cover 8. Since the battery cover 8 is formed in a box shape,
Although the strength of the middle portion is lower than that of the front and rear ends, the middle portion having a lower strength is reinforced by the reinforcement 9, so that the battery cover 8 can be effectively prevented from being bent or deformed. In particular, if a closed cross-sectional structure is formed by the reinforcement 9 and the battery cover 8, the rigidity is further increased. In addition, since the seat belt anchor 16 is attached to the reinforcement 9, a sufficient restraining force can be exerted against the occupant's forward inertial force acting on the rear seat 4 at the time of a front collision or the like. Further, even if the battery cover 8 is formed of a thin metal plate, sufficient strength can be achieved, and thus the overall weight can be reduced.

In the above embodiment, an electric vehicle having an electric motor and a battery has been described. In addition to this, a hybrid vehicle having a power generating engine or a hybrid vehicle having an engine for both power generation and driving is provided. The present invention is also applicable. Although the example in which the rear seat is fixed to the battery cover has been described, a foldable rear seat may be arranged on the battery cover. In the case of a foldable rear seat, a seat belt is not necessarily required by law, so it is not always necessary to attach a seat belt anchor to the reinforcement.

[0016]

As is apparent from the above description, according to the present invention, the box-shaped battery cover is fixed on the rear floor, and the side walls and the upper surface of the middle portion of the battery cover in the front-rear direction of the vehicle body are rained. The reinforcement is continuously fixed, and the rear seat is placed on the front side of the battery cover's reinforcement fixing part.The rear end of the rear seat is attached to the reinforcement, so the middle part of the battery cover, which has the lowest strength, can be used. It can be reinforced with reinforcement and can effectively support the load of the occupant seated in the rear seat. Therefore, even if the battery cover is formed of a relatively lightweight material, its deformation and bending can be prevented. Further, by arranging the rear seat on the battery cover, the battery mounting space occupying a large space can be shared with the rear seat arranging space, and the space efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is an indoor perspective view of an electric vehicle having a battery mounting structure according to the present invention.

FIG. 2 is a rear sectional view of the electric vehicle shown in FIG. 1;

FIG. 3 is a perspective view of the rear seat of the electric vehicle shown in FIG. 1 as viewed from the rear.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric motor 4 Rear floor 5 Rear seat 6 Battery 7 Battery storage part 8 Battery cover 9 Reinforcement 11 Bracket 15 Anchor bracket 16 Seat belt anchor

Claims (2)

[Claims] 1. An electric vehicle having a plurality of batteries mounted on a rear floor, wherein a box-shaped battery cover which covers the entire upper surface of the battery is fixed on the rear floor, and both sides of an intermediate portion of the battery cover in the vehicle longitudinal direction. The reinforcement is continuously fixed to the wall and the upper surface, a rear seat is disposed in front of the reinforcement fixing portion of the battery cover, and a rear end of the rear seat is attached to the reinforcement. Battery mounting structure of an electric vehicle. 2. The battery mounting structure for an electric vehicle according to claim 1, wherein a seat belt anchor of a rear seat is attached to the reinforcement.