JP3218841B2 - Electric car - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to 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 An electric vehicle as a pollution-free vehicle having no exhaust gas or noise often uses an AC motor or a DC motor and a battery as power sources. Usually, the battery is stored in a battery carrier. The battery carrier is supported under the floor of the vehicle body, and one example thereof is disclosed in JP-A-5-193366.

As shown in FIG. 12, in this electric vehicle, a battery carrier 74 is disposed between two side frames 70 and 72, and the battery carrier 7 is provided.
A cross member 76 is provided in front of the fourth member 4.

[0004] As shown in FIG. 13, the battery carrier 74 includes a box body 78, a lower inner 80, an upper inner 82 and a lid 84. The inside of the lower inner 80 is partitioned by vertical and horizontal partition portions 80A.
It is arranged so as to be immovable while being separated from each other via A.

[0005]

However, the electric vehicle is heavier than the engine vehicle due to the effects of the battery carrier 74 and the battery.
Therefore, in order to receive the energy at the time of collision and suppress the deformation of the cabin space, the strength of the side frames 70 and 72 (see FIG. 12) and the like as the components of the vehicle is increased by increasing the plate thickness and using the reinforcing members and the like. , Which has significantly increased the vehicle weight.

In view of the above, an object of the present invention is to provide an electric vehicle capable of suppressing deformation of a cabin space at the time of a collision without significantly increasing the weight of the vehicle.

[0007]

According to the first aspect of the present invention, there is provided an electric vehicle in which a battery carrier is mounted in a lower portion of a vehicle cabin. The electric vehicle extends in the front-rear direction of the vehicle in front of the battery carrier. A side member provided so as to be able to absorb energy applied to the vehicle, and a reinforcement connected at one end surface to the side member and arranged at the other end surface to face a front wall surface of the battery carrier. And a member.

[0008] The electric vehicle of the present invention according to claim 2 is
The electric vehicle according to claim 1, wherein a high-strength member that connects the side member to a rocker member that is disposed on both sides of the vehicle body and extends in the vehicle front-rear direction, and one end face that extends substantially parallel to the rocker member and has one end face. A sub-reinforcing member connected to the high-strength member and arranged so that the other end face is opposed to a front wall surface of the battery carrier.

The electric vehicle of the present invention according to claim 3 is:
The electric vehicle according to claim 1, wherein the reinforcing member has a floor structure having a closed cross-section provided in a position facing a front wall surface of the battery carrier and extending in a vehicle front-rear direction.

The electric vehicle according to the present invention described in claim 4 is:
4. The electric vehicle according to claim 3, wherein the floor structure is configured by adding a panel from a vehicle cabin side to a floor step portion protruding downward from the vehicle at a position facing a front wall surface of the battery carrier. Features.

[0011] The electric vehicle according to the present invention as described in claim 5 is:
The electric vehicle according to claim 4, wherein an auxiliary device such as an electronic device of the vehicle is mounted in a closed cross section of the floor structure.

According to a sixth aspect of the present invention, there is provided an electric vehicle in which a battery carrier is mounted between left and right rocker members at a lower portion of a vehicle cabin in a vehicle width direction having an end face connected to the rocker member and facing the battery carrier. The battery carrier is attached to the rocker member via a bracket that forms a closed cross section along the battery carrier.

[0013]

According to the first aspect of the present invention, when the vehicle is in a collision,
Since the side members absorb the energy applied to the vehicle and a part of the energy is transmitted to the battery carrier via the reinforcing member, a part of the collision energy can be received by the mass of the battery carrier. In other words, the kinetic energy of the battery carrier is transmitted to the side member via the reinforcing member, and the energy can be absorbed by the deformation of the side member. Therefore, the strength of the rocker member can be kept low only by adding the reinforcing member, so that the deformation of the cabin space at the time of collision can be suppressed without significantly increasing the vehicle weight.

In the electric vehicle according to the present invention, at the time of a vehicle collision, the side member absorbs energy applied to the vehicle, and a part of the energy is transmitted to the battery carrier via the reinforcing member. Further, another part of the energy is transmitted to the rocker member via the high-strength member and to the battery carrier via the high-strength member and the sub-reinforcement member. Therefore, part of the collision energy can be received by the mass of the battery carrier. Therefore, the strength of the rocker member can be kept low only by adding the reinforcing member, the high-strength member, and the sub-reinforcing member, so that the deformation of the cabin space at the time of the collision can be suppressed without significantly increasing the vehicle weight. Can be.

In the electric vehicle according to the third aspect, at the time of a vehicle collision, the side member absorbs energy applied to the vehicle, and a part of the energy is transmitted to the battery carrier through a floor structure having a closed cross section. To be
Part of the collision energy can be received by the mass of the battery carrier. Therefore, the strength of the rocker member can be kept low only by setting the floor structure to a structure having a closed cross-section provided at a position facing the front wall surface of the battery carrier, without significantly increasing the vehicle weight. In addition, deformation of the cabin space at the time of collision can be suppressed.

In the electric vehicle according to the fourth aspect, at the time of a vehicle collision, the side member absorbs energy applied to the vehicle, and a part of the energy is provided on the floor stepped portion protruding downward from the vehicle, and Since the energy is transmitted to the battery carrier through a floor structure having a closed cross-section obtained by a panel added to the step portion from the vehicle interior side, part of the collision energy can be received by the mass of the battery carrier. Therefore, the strength of the rocker member can be kept low only by setting the floor structure to a structure having a closed cross-section provided at a position facing the front wall surface of the battery carrier, without significantly increasing the vehicle weight. ,
The deformation of the cabin space at the time of collision can be suppressed.

In the electric vehicle according to the present invention, in addition to the above-described effects, since the auxiliary device such as the electronic device of the vehicle is mounted in the closed cross section of the floor structure, the sealing property of the mounting position of the electronic device can be secured. In addition, the electronic device can be suitably mounted without newly adding a special space.

[0018] In the electric vehicle according to claim 6, when the side collision occurs,
Part of the energy applied to the rocker member is transmitted to the battery carrier via the bracket forming the closed cross section extending in the vehicle width direction, so that part of the collision energy can be received by the mass of the battery carrier. Therefore,
Even when the distance between the battery carrier and the rocker member is large, the strength of the rocker can be kept low only by connecting the battery carrier and the rocker member with the bracket, without significantly increasing the vehicle weight. The deformation of the cabin space at the time of a side collision can be suppressed.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the electric vehicle according to the present invention will be described with reference to FIGS.

In the drawings, an arrow FR indicates a forward direction of the vehicle, an arrow IN indicates an inward direction of the vehicle width, and an arrow UP indicates an upward direction of the vehicle.

As shown in FIG. 4, the electric vehicle body 1
A battery carrier 12 on which a battery 11 is mounted is fixed below the cabin space 10A. A pair of left and right front side members 14 extending in the front-rear direction of the vehicle are disposed in the front body 10B of the vehicle body 10.

As shown in FIG. 6, the battery carrier 1
Reference numeral 2 denotes a rectangular box having an open upper part, in which a battery 11 as a power source of the electric vehicle is stored. A flange 12A extends horizontally from the opening edge of the battery carrier 12, and a long hole 16 extending in the vehicle front-rear direction is formed in the left and right flanges 12A of the battery carrier 12.

As shown in FIG. 5, a bolt 24 is inserted into the long hole 16 from below, and the bolt 24 is a rocker 26 forming a closed section 25 extending in the longitudinal direction of the vehicle.
Are welded to a weld nut 28 welded to a rocker inner 26A forming an inner portion in the vehicle width direction. As a result, the battery carrier 12 is attached to the rocker 26 by the bolt 24 and the weld nut 28 with a predetermined tightening force.

As shown in FIG. 1, the rear end 14A of the front side member 14 is
The lower edge of the dash panel 30 is connected to the upper edge 32A of the dash lower panel 32. The dash lower panel 32 extends obliquely downward toward the rear of the vehicle, and a rear edge 32B is connected to a front edge 34A of the front floor panel 34.

The lower portion of the rear end of the front side member 14
An extension 36 extends downward along the dash lower panel 32 toward the rear of the vehicle. This extension 3
6 is welded to the dash lower panel 32 and has a closed cross section 38
The closed cross-section 38 is formed by the front side member 14 in the vehicle front-rear direction.
It communicates with 0. The front end 42A of the floor under reinforcement 42 as a reinforcing member is connected to the rear end 36A of the extension 36.

The floor under reinforcement 42 is welded to the lower surfaces of the dash lower panel 32 and the front floor panel 34 to form a closed section 44 communicating with the closed section 38.

As shown in FIG. 2, the extending portion 36 of the front side member 14 is inclined obliquely rearward in the vehicle width direction in plan view, and coaxially with the extending portion 36 of the floor under reinforcement 42. There is a front part 42B. A rear portion 42C of the floor under reinforcement 42 extends rearward of the vehicle, and a rear end surface 42D faces the front wall surface 12B of the battery carrier 12.

The rear part 4 of the floor under reinforcement 42
A sub-floor under reinforcement 46 as a sub-reinforcement member is disposed substantially parallel to the outside in the vehicle width direction of 2C.

As shown in FIG. 3, the sub-floor under reinforcement 46 is welded to the lower surface side of the front floor panel 34 to form a closed section 48 extending in the vehicle longitudinal direction. A torque box 50 as a high-strength member is provided in front of the sub-floor under reinforcement 46 along the vehicle width direction. The torque box 50 has an L-shape when viewed from the side, and forms a closed section 52 that is welded to the lower surface of the dash lower panel 32 and extends in the vehicle width direction.

As shown in FIG. 2, both ends in the vehicle width direction of the closed section 52 are connected to a front end 26B of the rocker 26. The extension 3 of the front side member 14
6 and a front portion 42B of the floor under reinforcement 42 penetrate the closed cross-section 52, and the closed cross-section 52 allows the extended portion 36 of the front side member 14, the front portion 42B of the floor under reinforcement 42, and the rocker 26 is connected to a front end 26B. The front end surface 46A of the subfloor under reinforcement 46 is welded to the rear wall surface 50A of the torque box 50, and the rear end surface 46B of the subfloor under reinforcement 46 is opposed to the front wall surface 12B of the battery carrier 12.

Next, the operation of the first embodiment will be described. In the electric vehicle of the first embodiment, at the time of a vehicle collision, the front side member 14 is compressed and deformed to absorb the energy applied to the vehicle body 10 and a part of the energy is
As shown by an arrow A in FIGS. 1 and 2, the power is transmitted to the front wall 12 </ b> B of the battery carrier 12 through the floor under reinforcement 42. At this time, the battery carrier 1
2 is moving forward as shown by the imaginary line in FIG. 2 and is in contact with the rear end face 42D of the floor under reinforcement 42.

Further, another part of the energy is transmitted to the rocker 26 through the torque box 50 as shown by an arrow B in FIG. 2 and is transmitted to the torque box 50 as shown by an arrow C in FIG. The front wall 12 of the battery carrier 12 is connected via the subfloor under reinforcement 46.
B. At this time, the battery carrier 12 is moving forward and the subfloor under reinforcement 46
Abuts against the rear end surface 46B.

Therefore, part of the collision energy can be received by the mass of the battery carrier 12. In other words, the kinetic energy of the battery carrier 12 is transmitted to the front side member 14 via the floor under reinforcement 42, and the energy can be absorbed by the deformation of the front side member 14.

Therefore, the floor under reinforcement 4
2. Since the strength of the rocker 26 can be kept low only by adding the torque box 50 and the sub-floor under reinforcement 46, the deformation of the cabin space at the time of collision can be suppressed without significantly increasing the vehicle weight. .

In the first embodiment, the floor under reinforcement 42, the torque box 50 and the sub-floor under reinforcement 46 are added. However, a configuration in which only the floor under reinforcement 42 is added may be adopted.

The subfloor under reinforcement 4
Although 6 is provided directly on the torque box, it is also preferable that the extended portion 36 is formed into a forked structure and directly connected to the front side member 14.

Next, a second embodiment of the electric vehicle according to the present invention will be described with reference to FIGS. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 7, the front floor panel 34 of the second embodiment has a floor step 47 projecting downward from the vehicle in a rectangular shape in a plan view at a position in front of the battery carrier 12. Is formed.

As shown in FIG. 8, a panel 49 is added to the floor step 47 from above the vehicle, that is, from the vehicle interior side, and a closed cross section 51 extending in the vehicle front-rear direction is formed above the floor under reinforcement 42. Is formed. In addition, the rear end face 51A of the closed cross section 51 is opposed to the front wall surface 12B of the battery carrier 12.

In the lower part of the floor step 47, the thickness of the floor under reinforcement 42 in the vertical direction is small, and the thickness of the closed cross-section 51 and the closed cross-section 44 is the same as that of the first embodiment. The thickness is substantially equal to the thickness of the cross section 44.

As shown in FIG. 9, a floor step 47 is provided.
Are disposed on the left and right sides of the floor tunnel 53, and the outer end in the vehicle width direction reaches the vicinity of the rocker inner 26A. An auxiliary device 54 such as an electronic device is mounted in the closed section 51.

Next, the operation of the second embodiment will be described. In the electric vehicle according to the second embodiment, at the time of a vehicle collision, the front side member 14 is compressed and deformed to absorb the energy applied to the vehicle body 10 and a part of the energy is
A front wall portion of the battery carrier 12 is provided via a floor structure having a closed cross section 51 obtained by a floor step portion 47 protruding downward from the vehicle and a panel 49 added to the floor step portion 47 from the vehicle interior side. 12B. At this time, the battery carrier 12 is moving forward as indicated by the imaginary line in FIG.
A is in contact with A.

Therefore, since a part of the collision energy can be received by the mass of the battery carrier 12, the floor structure has a closed section 51 provided at a position facing the front wall surface 12B of the battery carrier 12. Only with this, the strength of the rocker 26 can be kept low, so that deformation of the cabin space at the time of collision can be suppressed without significantly increasing the vehicle weight.

Further, the closed section 51 of the floor structure is formed by adding a panel 49 from the vehicle interior side, and is a space suitably shielded from the outside of the vehicle. Since the auxiliary device 54 such as a device is mounted, the sealing performance of the mounting position of the electronic device can be ensured, and the mounting of the electronic device can be suitably performed without newly adding a special space.

Next, a third embodiment of the electric vehicle according to the present invention will be described with reference to FIGS.

The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. As shown in FIG. 10, in the third embodiment, a bracket 58 is arranged between the rocker inner 26A and the battery carrier 12, and
The bracket 58 has a box shape that is open upward and outward in the vehicle width direction.

As shown in FIG. 11, the bracket 58 is welded to the lower surface of the front floor panel 34, and forms a closed section 60 extending in the vehicle width direction with the front floor panel 34. The vehicle width direction outer end portion 58A of the bracket 58 is welded to the vehicle width direction inner wall portion of the rocker inner 26A, and the vehicle width direction inner end surface 58B faces the side wall portion 62A of the cover 62 of the battery carrier 12.

The cover 62 has an inverted dish shape, and a bracket 58 is formed by a bolt 64 and a weld nut 66 in a state where a flange 62B formed on the outer peripheral portion is joined to the flange 12A of the battery carrier 12.
Is fixed to the lower surface 58C in the vehicle width direction.

Next, the operation of the third embodiment will be described. In the electric vehicle according to the third embodiment, a part of the energy applied to the rocker 26 at the time of the side collision is reduced by a bracket 58 forming a closed cross section 60 extending in the vehicle width direction as shown by an arrow D in FIG. Through the front wall portion 12B of the battery carrier 12.
Therefore, a part of the collision energy can be received by the mass of the battery carrier 12. Therefore, even when the distance between the battery carrier 12 and the rocker 26 is large, the strength of the rocker 26 can be reduced only by connecting the battery carrier 12 and the rocker 26 with the bracket 58, so that the vehicle weight is significantly reduced. It is possible to suppress the deformation of the cabin space at the time of a side collision without increasing the space.

In the above, the present invention has been described in detail with reference to specific embodiments. However, the present invention is not limited to such embodiments, and various other embodiments are included within the scope of the present invention. It is clear to a person skilled in the art that is possible.

[0051]

According to the first aspect of the present invention, there is provided an electric vehicle in which a battery carrier is mounted in a lower portion of a vehicle cabin and is provided in front of the battery carrier so as to extend in the front-rear direction of the vehicle. And a reinforcing member having one end face connected to the side member and the other end face disposed opposite to the front wall surface of the battery carrier. Therefore, there is an excellent effect that deformation of the cabin space at the time of collision can be suppressed without significantly increasing the vehicle weight.

The electric vehicle of the present invention according to claim 2 is
The high-strength member for connecting the side member to a rocker member disposed on both sides of the vehicle body and extending in the vehicle front-rear direction, substantially parallel to the rocker member. And one end face is connected to the high-strength member, and the other end face is disposed so as to face the front wall surface of the battery carrier. Without this, there is an excellent effect that deformation of the cabin space at the time of collision can be suppressed.

The electric vehicle according to the third aspect of the present invention comprises:
In the electric vehicle according to the first aspect of the present invention, since the reinforcing member has a floor structure having a closed cross-section extending in the vehicle front-rear direction provided at a position facing the front wall surface of the battery carrier, the weight of the vehicle is significantly reduced. Without increasing
It has an excellent effect that deformation of the cabin space at the time of a collision can be suppressed.

The electric vehicle of the present invention according to claim 4 is
In the electric vehicle according to the third aspect, the floor structure is configured by adding a panel from the vehicle interior side to a floor step portion protruding downward from the vehicle at a position facing the front wall surface of the battery carrier. Therefore, there is an excellent effect that deformation of the cabin space at the time of collision can be suppressed without significantly increasing the vehicle weight.

The electric vehicle of the present invention according to claim 5 is:
In the electric vehicle according to the fourth aspect, since auxiliary equipment such as electronic equipment of the vehicle is mounted in the closed cross section of the floor structure, deformation of the cabin space at the time of collision is suppressed without significantly increasing the weight of the vehicle. It has an excellent effect that it can be performed. In addition, the sealing property of the auxiliary equipment such as the electronic device can be ensured, and the electronic device can be suitably mounted without adding a special space.

According to a sixth aspect of the present invention, there is provided an electric vehicle in which a battery carrier is mounted between left and right rocker members at a lower portion of a vehicle cabin, along a vehicle width direction having an end face connected to the rocker member and facing the battery carrier. Since the battery carrier is attached to the rocker member via the bracket forming the closed cross section, an excellent effect that the deformation of the cabin space at the time of a collision can be suppressed without significantly increasing the vehicle weight. Having.

[Brief description of the drawings]

FIG. 1 is a schematic side sectional view showing an electric vehicle according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a sectional view taken along line 3-3 of FIG. 2;

FIG. 4 is a perspective view of the electric vehicle according to the first embodiment of the present invention, as viewed from a diagonally lower rear side of the vehicle.

FIG. 5 is a sectional view showing a rocker member of the electric vehicle according to the first embodiment of the present invention.

FIG. 6 is a perspective view showing the battery carrier of the electric vehicle according to the first embodiment of the present invention, as viewed obliquely from the front of the vehicle.

FIG. 7 is a perspective view of an electric vehicle according to a second embodiment of the present invention, as viewed obliquely from the rear and outside.

8 is a sectional view taken along line 8-8 of FIG. 7;

FIG. 9 is a sectional view taken along line 9-9 of FIG. 8;

FIG. 10 is a perspective view showing an electric vehicle according to a third embodiment of the present invention as viewed obliquely from the front outside the vehicle.

FIG. 11 is a sectional view taken along line 11-11 of FIG. 10;

FIG. 12 is a bottom view showing an electric vehicle according to a conventional example.

FIG. 13 is an exploded perspective view showing a battery carrier of an electric vehicle according to a conventional example.

[Explanation of symbols]

REFERENCE SIGNS LIST 10 vehicle body 10A cabin space 11 battery 12 battery carrier 12B front wall surface 14 front side member 26 rocker 34 front floor panel 42 floor under reinforcement (reinforcement member) 42D rear end surface 46 subfloor under reinforcement (sub reinforcement member) 46A front end surface 46B rear end surface 49 Panel 50 Torque box (high-strength member) 51 Closed cross section 52 Closed cross section 54 Auxiliary equipment 58 Bracket 58B Vehicle width direction inner end face 60 Closed cross section

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60K 1/04 B62D 25/20

Claims (6)

(57) [Claims] 1. An electric vehicle having a battery carrier mounted in a lower portion of a vehicle cabin, wherein a side member is provided in front of the battery carrier so as to extend in a front-rear direction of the vehicle and configured to absorb energy applied to the vehicle. And a reinforcing member having one end face connected to the side member and the other end face facing the front wall surface of the battery carrier. 2. The vehicle according to claim 1, wherein the side member is provided on both sides of the vehicle body.
A high-strength member connecting a rocker member extending in the vehicle front-rear direction, and one end face extending substantially parallel to the rocker member and having one end face connected to the high-strength member and the other end face facing the front wall surface of the battery carrier. The electric vehicle according to claim 1, further comprising: a sub-reinforcement member arranged as described above. 3. The electric vehicle according to claim 1, wherein the reinforcing member has a floor structure having a closed cross-section extending in the vehicle front-rear direction provided at a position facing a front wall surface of the battery carrier. 4. The floor structure according to claim 1, wherein a panel is added from a vehicle interior side to a floor step portion protruding downward from the vehicle at a position facing a front wall surface of the battery carrier. Item 3. The electric vehicle according to Item 3. 5. An auxiliary device such as an electronic device of a vehicle is mounted in a closed section of the floor structure.
An electric vehicle as described. 6. An electric vehicle in which a battery carrier is mounted between left and right rocker members at a lower portion of a vehicle cabin, and a closed cross section is formed along a vehicle width direction having an end face connected to the rocker member and facing the battery carrier. An electric vehicle, wherein the battery carrier is attached to the rocker member via a bracket.