JP6967328B2 - Battery-powered vehicle structure - Google Patents

Description

The present invention relates to the structure of a battery-equipped vehicle, which is applied when a battery such as a lithium ion secondary battery is mounted in a vehicle such as an electric vehicle or a hybrid vehicle.

Specific examples of the structure of the battery-equipped vehicle include those described in Patent Documents 1 and 2.
In the structures described in these documents, a space portion is provided in the lower region of the seat cushion frame of the rear seat for the vehicle, and the battery is mounted on the floor portion of the vehicle interior so as to be located in the space portion. Has been done. The seat cushion frame is supported by a plurality of support legs, and the seat cushion frame and the plurality of support legs form a turret-like structure that surrounds or covers the battery.
According to such a configuration, the lower region of the rear seat can be effectively used and the battery can be mounted in the vehicle in a space-efficient manner. Further, although the turret-shaped structure is originally a constituent member of the rear seat, it is rational because it also functions as a protective member for the battery.

However, in the above-mentioned prior art, there is still room for improvement.

That is, although the turret-shaped structure consisting of the seat cushion frame and a plurality of support legs plays a role of protecting the battery, it is said that the turret-like structure exhibits sufficient protection performance against the battery in the event of a side collision of the vehicle. No. Conventionally, when a vehicle collides with a side, an object of the side collision may greatly enter the vehicle interior side and strongly collide with the battery.
As a means to solve this, it is conceivable to make each part such as the floor part and the turret-like structure thick to increase the rigidity, or to use a high-strength material. However, according to the former means, the weight is increased. In addition, it causes an increase in manufacturing cost, and the latter means also causes an increase in manufacturing cost.

Japanese Unexamined Patent Publication No. 2011-126439 Japanese Patent No. 5083465

The present invention has been conceived under the above-mentioned circumstances, and while suppressing an increase in weight and an increase in manufacturing cost, the battery protection performance at the time of a side collision of a vehicle is made higher than before. It is an object of the present invention to provide a structure of a battery-equipped vehicle capable of capable.

In order to solve the above problems, the following technical means are taken in the present invention.

The structure of the battery-equipped vehicle provided by the present invention includes a battery mounted on the floor of the vehicle compartment, an upper structural member located above the battery, and an upper portion connected to the upper structural member and a lower portion thereof. Is a structure of a battery-equipped vehicle comprising a turret-like structure having a support leg attached to the floor, wherein the support leg is closer to the outer end of the floor in the vehicle width direction. The lower part is supported by the mounting portion near the outer end provided at the position, and the upper side is provided with at least one inclined support leg portion inclined so as to be located on the center side in the vehicle width direction with respect to the lower side, and the outer end thereof. The lean mounting portion is provided with an inclined wall portion that is inclined so that the height becomes lower toward the center side in the vehicle width direction, and the inclined support leg portion and the inclined wall portion are the inclined support portion in the front view of the vehicle. The vehicle faces each other in a manner inclined in the opposite directions with the horizontal line passing through the connecting portion between the leg portion and the mounting portion near the outer end, and a side collision of the vehicle occurs. When a collision load in the horizontal direction is input from the outside in the vehicle width direction, the collision load can be distributed and input to both portions as a load for compressing each of the inclined support leg portion and the inclined wall portion. It is a feature that is considered to be a composition.

With such a configuration, the following effects can be obtained.
That is, a side collision of the vehicle occurs, and the floor portion is mounted from the outer side to the inner side in the vehicle width direction with respect to the mounting portion near the outer end to which the lower portion of the inclined support leg is mounted or its vicinity. When a load is input, this load acts to be distributed substantially evenly on both the inclined support leg portion and the inclined wall portion of the attachment portion near the outer end.
Therefore, the load does not act on only the floor portion or only the turret-shaped structure in a state of being greatly biased due to the load input, and the load is substantially equalized by both the turret-shaped structure and the floor portion. The load can be efficiently absorbed by receiving the load. As a result, it is possible to appropriately prevent or suppress that the side collision object greatly enters the vehicle interior side and strongly collides with the battery. Therefore, better battery protection performance than before can be obtained.
In the present invention, as a means for protecting the battery, it is not necessary to make each part such as a floor part or a turret-like structure thick or to make a high-strength material, so that the weight increases and the manufacturing cost increases. It is possible to appropriately suppress the rise.

Other features and advantages of the invention will become more apparent from the following description of embodiments of the invention with reference to the accompanying drawings.

It is a schematic perspective view of the main part which shows an example of the structure of the battery-mounted vehicle which concerns on this invention. FIG. 2 is a schematic cross-sectional view taken along the line II-II of FIG. It is a front view of the main part of FIG. 1 (the view of the front view of the vehicle). (A) and (b) are cross-sectional views of a main part showing another example of the present invention.

Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

The structure A of the battery-equipped vehicle shown in FIGS. 1 and 2 includes a battery 2 mounted on the floor portion 1 of the vehicle interior and a turret-shaped structure 4, and the battery 2 is a turret-shaped structure 4. It is located in the space secured inside.
The vehicle to which the structure A of the present embodiment is applied is, for example, a hybrid vehicle or an electric vehicle. The battery 2 is a driving battery for those vehicles, for example, a lithium ion secondary battery, a nickel hydrogen secondary battery, or the like.

The floor portion 1 of the vehicle interior can be divided into first and second floor portions 1a and 1b, and a floor cross portion 1c. The first and second floor portions 1a and 1b are portions configured by using, for example, a front floor panel and a rear floor panel, and are connected via a floor cloth portion 1c. The battery 2 is fixed on the second floor portion 1b. The floor cross portion 1c is configured by using a cross member which is a member different from the first and second floor portions 1a and 1b, and is raised above the first and second floor portions 1a and 1b. It has a form that extends in the vehicle width direction, and its rigidity is also high. However, as will be described later with reference to FIG. 4, the configuration of the floor portion 1 is not limited to this.

As shown in FIG. 2, the turret-shaped structure 4 is configured as a seat cushion frame for mounting and supporting the seat back 3 and the seat cushion 3a of the vehicle seat (rear seat).
More specifically, the turret-shaped structure 4 is formed in, for example, a hollow frame-shaped upper frame portion 40 formed by using a pipe material, and the upper frame portion 40 so as to close the inner opening region of the upper frame portion 40. The joined seat pan 41, the plurality of support legs 42 (42a, 42b) that support the front portion of the upper frame portion 40, and the upright wall provided with the rear portion of the upper frame portion 40 on the second floor portion 1b. A bracket portion 43 or the like for fixing to a portion in the middle of the portion 19 is provided. The upper frame portion 40 and the seat pan 41 are portions on which the seat cushion 3a and the like are placed on the upper surface thereof, but these are located above the battery 2 and cover the upper part of the battery 2 in the present invention. It corresponds to an example of the "superstructure member" of the turret-shaped structure.

The upper portion of the plurality of support legs 42 is connected to the front side portion of the upper frame portion 40 by means such as welding, and the lower portion is attached to the floor cloth portion 1c by means such as bolting. Of these plurality of support leg portions 42 (42a, 42b), the support leg portion 42a located closer to the center in the vehicle width direction is provided in a non-tilted upright state in the vertical height direction, whereas the vehicle width is provided. The pair of left and right support legs 42b located near both ends in the direction are the inclined support legs 42b described below.

As shown in FIG. 3, each inclined support leg portion 42b includes a base portion 45 joined to the upper frame portion 40 and a support leg main body portion 46 extending downward from the base portion 45, and the support leg main body portion 46 is provided. The lower portion of the floor cross portion 1c is connected to the outer end-side mounting portion 18 provided at a position near the outer end in the vehicle width direction by using a bolt 6 or the like. Further, the inclined support leg portion 42b (strictly speaking, the support leg main body portion 46) is inclined at an appropriate angle α with respect to the horizon so that the upper side is located closer to the center side in the vehicle width direction than the lower side.

On the other hand, the mounting portion 18 near the outer end is higher in height than the other portions of the floor cloth portion 1c, and includes an inclined wall portion 18a that stands up toward the inward side in the vehicle width direction. The inclined wall portion 18a is a wall portion that faces the inclined support leg portion 42b and is inclined in a direction opposite to the inclined direction of the inclined support leg portion 42b in the front view of the vehicle. Although slightly different from the configuration shown in the drawings, preferably, the inclination angle β of the inclined wall portion 18a is substantially the same as the inclination angle α of the inclined support leg portion 42b. More preferably, the inclined support leg portion 42b and the inclined wall portion 18a are configured to be vertically symmetrically inclined around the horizontal line HL passing through the connecting portion between the inclined support leg portion 42b and the attachment portion near the outer end. Will be done.
Although omitted in the drawings, a rocker panel extending in the front-rear direction of the vehicle is provided on the outer side of the floor cross portion 1c in the vehicle width direction. Further, a pair of side members extending in the front-rear direction of the vehicle are provided on the lower surface side of both ends of the floor portion 1 in the vehicle width direction.

Next, the operation of the structure A of the battery-equipped vehicle described above will be described.

First, due to the occurrence of a side collision of the vehicle, as shown in FIG. 3, a collision load W from the outside to the inside in the vehicle width direction may be input to the mounting portion 18 near the outer end. In this case, the load W acts to be distributed substantially evenly on both the inclined support leg portion 42b and the inclined wall portion 18a, and the distributed load Wa, Wb of the load W is applied to the inclined support leg portion 42b and the inclined wall portion 18a. Will act respectively. Therefore, the load W does not act on the turret-shaped structure 4 alone or on the floor portion 1 in a state of being greatly biased, and the load W (Wa, Wb) is received by both the turret-shaped structure 4 and the floor portion 1. Therefore, this load W can be efficiently absorbed. As a result, the phenomenon that the side collision object greatly enters the vehicle interior and strongly hits the battery 2 is appropriately prevented or suppressed, and excellent protection performance for the battery 2 can be obtained.

Although the support leg portion 42a does not exert the action as described for the inclined support leg portion 42b, the turret-like structure 4 and the floor portion 1 cooperate with each other to promote receiving a collision load W (Wa, Wb). In addition, it exerts an effect of preventing the inclined support leg portion 42b from being unreasonably tilted. Therefore, by providing the support leg portion 42a, the protection performance of the battery 2 is further enhanced.

The battery protection performance as described above can be obtained without adopting means for reinforcing each portion of the floor portion 1 and the turret-shaped structure 4 by making them thick. Therefore, it is possible to appropriately suppress an increase in the weight of each part and an increase in manufacturing cost.

FIG. 4 shows another embodiment of the present invention. In the figure, the same or similar elements as those in the embodiment are designated by the same reference numerals as those in the embodiment, and duplicate description will be omitted.

In FIG. 4A, the floor cross portion 1c is provided by integrally forming the convex portion on the floor panel material 15, and the inclined support leg portion 42b is attached to the floor cross portion 1c. An end-side mounting portion 18 is provided.
In the figure (b), convex portions 13a and 14a are formed on both of the two floor panel materials 13 and 14, and the floor cloth portion 1c is provided by combining and joining the convex portions 13a and 14a, and the floor cloth is provided. The portion 1c is provided with an outer end-side mounting portion 18 for mounting the inclined support leg portion 42b.
As can be understood from these embodiments and the embodiments shown in FIGS. 1 to 3, the method of providing the outer end side mounting portion 18 in the present invention is a means using one or a plurality of floor panel materials, or a means using one or more floor panel materials. There is a means of using a cross member different from the floor panel material, and any means may be adopted.

The present invention is not limited to the contents of the above-described embodiments. The specific configuration of each part of the structure of the battery-equipped vehicle according to the present invention can be variously redesigned within the scope of the present invention.

In the above-described embodiment, since the inclined support legs 42b of the turret-shaped structure 4 are provided in pairs on the left and right end sides in the vehicle width direction, side collisions occur on either the left side or the right side of the vehicle. It is preferable because it has a function of protecting the battery even when it occurs. However, the present invention is not limited to this, and when there is a situation such as the installation space for providing the inclined support leg 42b cannot be secured, the inclined support leg is provided on only one of the left and right sides in the vehicle width direction. The configuration may be provided, and such a configuration is also included in the technical scope of the present invention.

The turret-shaped structure referred to in the present invention does not necessarily have to serve as a seat cushion frame for a vehicle seat. Therefore, the battery mounting location does not have to be in the lower region of the vehicle seat, and may be any location as long as it is on the floor of the vehicle interior. The turret-shaped structure may be provided corresponding to the position of the battery. The specific type and number of batteries are not limited.

A Structure of vehicle equipped with battery 1 Floor part 18 Mounting part near the outer end 18a Inclined wall part 2 Battery 4 Yagura-shaped structure 40 Upper frame part (superstructure member)
41 Sheet pan (superstructure member)
42 Support leg 42b Inclined support leg

Claims (1)

The battery mounted on the floor of the passenger compartment and
A superstructure member located above the battery, and a turret-like structure having a support leg portion whose upper part is connected to the superstructure member and whose lower part is attached to the floor portion.
The structure of the battery-powered vehicle, which is equipped with
As the support legs, the lower portion is supported by the outer end-side mounting portion provided at the position closer to the outer end of the floor portion in the vehicle width direction, and the upper side is located closer to the center side in the vehicle width direction than the lower side. It has at least one tilted support leg and is
The mounting portion near the outer end is provided with an inclined wall portion that is inclined so that the height becomes lower toward the center side in the vehicle width direction.
The inclined support leg portion and the inclined wall portion are inclined in opposite directions with each other across a horizontal line passing through a connecting portion between the inclined support leg portion and the attachment portion near the outer end in a front view of the vehicle. Facing the
When a side collision of the vehicle occurs and a horizontal collision load is input to the mounting portion near the outer end from the outside in the vehicle width direction, this collision load compresses each of the inclined support leg portion and the inclined wall portion. The structure of the vehicle equipped with a battery is characterized by being configured so that it can be distributed and input to both parts as the load to be applied.

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