JPH07186733A - Battery floor structure of electric vehicle - Google Patents

Abstract

PURPOSE:To provide the battery floor structure of an electric vehicle of which sealing property can be improved without using a battery cover. CONSTITUTION:Total four flange parts 20A, 20B are provided along the lengthwise direction on the upper face of a side frame 11 loaded with batteries and to be fitted to the side member of a body floor. The flange parts 20A near the inner and outer walls and the flange part 20A on the center part in the width direction of the side frame 11 are lower in height than the flange parts 20B on both sides of the center flange part 20A. The upper face of the flange part 20B is a contact face with the side member, and seal materials 22 are mounted on respective groove 21 adjacent to the inner and outer walls of the side frame 11. Similarly to the side frame 11, similar flange parts 20A, 20B, grooves 21, and seal materials 22 are also provided on a front frame, a rear frame, and a subframe.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art An example of a battery floor structure for an electric vehicle is disclosed in Japanese Patent Laid-Open No. 5-193367.

A battery box is suspended from a side member of the body of an electric vehicle, and a battery cover is attached to the upper part of the battery box.

The battery cover has a box shape and is fixed around the battery box via a lock member.

[0005]

However, in the above-mentioned conventional battery floor structure, the battery cover can protect the battery from water, but there is a problem that the number of parts increases and the cost increases.
Further, in order to ensure the watertightness between the battery cover and the battery case, a sealing material is further required.

On the other hand, when the battery case itself is mounted on the vehicle body floor, it is possible to hold a sealing material between the battery case itself and the vehicle body floor, but it is difficult to obtain the accuracy of the mounting surface of the battery floor and the sealing performance is ensured. It was difficult to say.

Therefore, the present invention provides a battery floor structure for an electric vehicle that can maintain watertightness without using a battery case.

[0008]

A battery floor structure of an electric vehicle attached to a lower portion of a vehicle body floor and accommodating a plurality of batteries, wherein a frame formed on an upper surface of an extruded member forming a periphery of the battery floor is provided with a frame. A plurality of flange portions are provided along the longitudinal direction.

In addition, a seal material that is in close contact with the lower surface of the vehicle body floor may be provided in the groove between the flange portions of the frame, and a joint angle between one frame and the other frame adjacent to each other in the bent portion of the frame. The terminal of each frame may be set on the bisector of

[0010]

According to the invention described in claim 1, since the upper surface of the flange portion abuts on the vehicle body floor, the abutting area is small and dimensional accuracy control and the like are facilitated.

According to the second and third aspects of the present invention, the sealing material interposed between the flanges allows the entire frame to be sealed without interruption.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 5 shows the floor of an electric vehicle.
In the figure, reference numeral 1 denotes a floor panel, and a floor member 2 is joined to the back side of the floor panel 1. The floor member 2 has side members 3 provided on both sides along the front-rear direction and three cross members 4, 5, 6 mounted between the side members 3 and extending in the vehicle width direction. . An L-shaped sub member 7 is provided between the cross member 5 and the side member 3.

A side sill 9 is attached to the outer wall of the side member 3 via an outrigger 8.

The floor panel 1 is joined to the floor member 2 thus constructed.

The floor panel 1 and the floor member 2 form a vehicle body floor.

On the other hand, in FIG. 5, reference numeral 10 denotes a battery frame, and each member of the battery frame 10 is formed of an aluminum extruded material, and the side member 3,
The cross members 4 and 6 are detachably attached.

The battery frame 10 is provided with side frames 11 as frames on both sides in the front-rear direction, and a front frame 12 and a rear frame 13 are provided at the front and rear parts as frames extending in the vehicle width direction. And an L-shaped sub-frame 14 as a frame connected to the rear frame 13 at the rear end of each side frame 11.
Is provided.

A lateral frame 15 is provided between the side frames 11 along the vehicle width direction, a vertical frame 16 is provided between the lateral frames 15 and the rear frame 13, and between the lateral frames 15 along the front-rear direction. Has been. The horizontal frame 15 and the vertical frame 16 arranged in a grid pattern
The storage portions 18 for the plurality of batteries 17 are sectioned and formed by and, and the batteries 17 are fixed to each storage portion 18 in pairs by the mounting bracket 19.

Here, as shown in FIG. 1, a side frame 11, a front frame 12, a rear frame 13 and a sub frame 1 which constitute the periphery of the battery frame 10.
For example, the side frame 11 will be described as an example on the upper surface of No. 4, and five flange portions 20 are formed along the longitudinal direction of the side frame 11.

With respect to the outer wall and the inner wall of the side frame 11 and the flange portion 20A in the widthwise central portion,
Flange portions 2 on both sides of the flange portion 20A in the widthwise central portion
The height of 0B is high. The upper surface of the flange portion 20B having a high height is a contact surface 20C for the side member 3.
Has become.

A groove 21 is formed between the flange portions 20A and 20B, and a groove 21 adjacent to the outer wall and the inner wall of the groove 21 is provided with a sealing material 22 made of, for example, an independent foam sealer. In the assembled state, the sealing material 22 is compressed to the height of the upper surface of the flange portion 20B.

The front frame 12, the rear frame 13 and the sub frame 1 other than the side frame 11 are described.
The upper surface of 4 has the same structure as the side frame 11.

At the mounting portion of the side frame 11 to the side member 3, the central flange portion 20A is cut as shown in FIG. 4, and a bolt insertion hole 23 is formed therein. In FIG. 1, 24 is a collar provided inside the side frame 11, and 25 is a bolt.

Here, the side frame 11, the front frame 12, the rear frame 13 and the sub-frame 1 are described.
4 are connected to each other, but in each connection part,
On the bisector L of the coupling angle, each frame 11, 1
2, 13, and 14 terminals are set. That is, as shown in FIG. 2, for example, in the connecting portion of the side frame 11 and the sub-frame 14, and in the bent portion of the front frame 12 as shown in FIG. 3, both terminals are connected by the bisector L of the connecting angle. Since it has been cut, the above-mentioned flange portion 2
The 0A, 20B and the groove 21 are continuously formed at the connecting portion and the bent portion.

Therefore, the sealing material 22 can be installed on the upper surfaces of the side frame 11, the front frame 12, the rear frame 13 and the sub frame 14 without interruption. In addition, reference numeral 26 in FIG. 4 denotes a downwardly convex emboss provided on the side member 3.

According to the structure of the above embodiment, the rigidity of each member, especially the strength and rigidity of the mounting surface is improved by the flange portions 20A and 20B on the upper portions of the side frame 11, the front frame 12, the rear frame 13 and the sub frame 14. Since the contact area of the vehicle body floor with the floor member 2 is small, the mounting surface accuracy can be easily controlled. For example, even when the surface accuracy is not obtained, the upper surface of the flange portion 20B can be easily repaired.

Also, the groove 21 formed by forming the flange portions 20A and 20B is effectively utilized to make the sealing material 2
Since 2 can be set, the manufacturing cost can be reduced as compared with the case where special groove processing is performed.

Since the side frame 11, the front frame 12, the rear frame 13, and the sub-frame 14 have the flange portions 20A, 20B and the groove 21 continuous, the sealing material 22 is arranged without interruption over the entire circumference. Therefore, the watertightness can be reliably maintained.

[0030]

According to the invention described in claim 1, since the strength and rigidity of the mounting surface is increased by the flange portion and the upper surface of the flange portion is in contact with the vehicle body floor, the contact area is small, and therefore the dimensional accuracy control is performed. There is an effect that it becomes easy.

According to the second aspect of the present invention, since the seal material can be mounted by effectively utilizing the groove formed when the flange portion is formed, it is not necessary to specially process the groove for the seal material, and the manufacturing cost can be reduced. It can be reduced.

According to the third aspect of the present invention, the groove and the flange portion are continuous over the entire circumference, and as a result, the sealing material can be arranged without interruption and the sealing performance can be reliably maintained.

[Brief description of drawings]

FIG. 1 is a sectional view taken along the line AA of FIG. 5 according to an embodiment of the present invention.

FIG. 2 is a plan view of part B of FIG.

FIG. 3 is a plan view of part C of FIG.

FIG. 4 is a plan view of section D in FIG.

FIG. 5 is an exploded perspective view of a floor of an electric vehicle.

[Explanation of symbols]

 1 ... Floor panel 2 ... Floor member 11 ... Side frame 12 ... Front frame 13 ... Rear frame 14 ... Sub frame 17 ... Battery 20A ... Flange portion 20B ... Flange portion 21 ... Groove 22 ... Sealing material L ... Bisecting line

Claims (3)

[Claims] 1. A battery floor structure for an electric vehicle, which is attached to a lower part of a vehicle body floor and accommodates a plurality of batteries, wherein an upper surface of a frame made of an extruded material that forms the periphery of the battery floor is provided along a longitudinal direction of the frame. And a plurality of flange portions are provided on the battery floor structure of an electric vehicle. 2. The battery floor structure for an electric vehicle according to claim 1, wherein a seal material that is in close contact with the lower surface of the vehicle body floor is provided in the groove between the flange portions of the frame. 3. The electric vehicle according to claim 2, wherein a terminal of each frame is set on a bisector of a coupling angle between one frame and the other frame adjacent to each other in the bent portion of the frame. Battery floor structure.