JP2021017095A - Battery loading structure - Google Patents

Abstract

To provide a battery loading structure more appropriately protecting a main battery disposed below a seat.SOLUTION: A battery loading structure includes: a third row seat 18; and a main battery 20 disposed below the third row seat 18. The third row seat 18 includes: a seat body 30; a pair of seat support frames 32 which are disposed at intervals in a vehicle width direction and on which the seat body 30 is placed, each of which is extended in a vehicle front/rear direction, and the vehicle front/back direction edge part of which curves downward so as to be across the main battery 20 from above in a vehicle front/rear direction; and a protection plate 50 which is bridged between a pair of seat support frames 32 so as to cover the main battery 20 from above and curved downward in a process where an intermediate part in the front/rear direction goes backward, according to the shape of the seat support frame 32.SELECTED DRAWING: Figure 2

Description

This specification discloses a battery-mounted structure in which the main battery is arranged under the back row seat.

Conventionally, an electric vehicle equipped with a traveling motor as one of the power sources has been widely known. The electric vehicle is also equipped with a main battery that stores electric power for driving a traveling motor. It has been partially proposed to place this main battery under the seat in order to make effective use of the space inside the vehicle.

For example, Patent Document 1 discloses a technique of arranging a main battery (referred to as a "battery unit" in Patent Document 1) under a seat frame on which a vehicle seat is placed. The seat frame includes a front frame and a center frame extending in the vehicle width direction, and a pair of side frames extending in the vehicle front-rear direction. Further, a front seat leg rising from the floor surface is connected to the front end of the side frame, and a rear seat leg rising from the floor surface is connected to the rear end of the side frame. In other words, the structure disclosed in Patent Document 1 includes a pair of side frames arranged at intervals in the vehicle width direction, a pair of front seat legs arranged at intervals in the vehicle width direction, and a vehicle width. There is a pair of rear seat legs that are spaced apart in the direction.

Japanese Unexamined Patent Publication No. 2014-73739

In the case of the configuration disclosed in Patent Document 1, when an obstacle collides with the side surface of the vehicle, a collision load inward in the vehicle width direction is input to the seat body or the like. When this collision load is transmitted to the side frame and the seat leg on the outer side in the vehicle width direction, these members may fall inward and downward in the vehicle width direction. Then, when the seat leg or the like falls down, the seat leg or the like may interfere with the main battery arranged under the seat, and the main battery may be damaged.

Therefore, the present specification discloses a battery mounting structure capable of more appropriately protecting the main battery arranged under the seat.

The battery-mounted structure disclosed in the present specification includes a rear row seat arranged behind the driver's seat and a main battery arranged below the rear row seat, and the rear row seat includes a seat body and a vehicle. A pair of seat support frames arranged at intervals in the width direction and on which the seat body is placed, each extending in the vehicle front-rear direction and straddling the main battery from the upper side in the vehicle front-rear direction. A protective plate spanning between a pair of seat support frames whose front-rear end of the vehicle is curved downward and the pair of seat support frames so as to cover the main battery from above. It is characterized by having a protective plate in which an intermediate portion in the front-rear direction thereof is curved downward in a process toward the rear according to the shape of the seat support frame.

By straddling the protective plate between the pair of seat support frames, even if the seat support frame on the outer side in the vehicle width direction tries to fall inward in the vehicle width direction, the protective plate functions like a stick. Therefore, the seat support frame is effectively prevented from collapsing. Further, by bending the rear portion of the protective plate downward, the protective plate is less likely to be deformed, and the seat support frame is more effectively prevented from collapsing. As a result, the main battery can be properly protected.

In this case, an auxiliary battery may be further provided adjacent to the outer side of the protective plate in the vehicle width direction.

With such a configuration, the space beside the seat can be effectively utilized. On the other hand, at the time of a side collision, the auxiliary battery falls to the back row seat side, but since the protective plate is provided, the seat support frame is effectively prevented from falling.

One or more beads extending in the vehicle width direction may be formed on the protective plate.

With such a configuration, the proof stress of the protective plate against compression in the vehicle width direction is further improved, and the seat support frame can be prevented from collapsing more effectively.

Further, each seat support frame extends in the front-rear direction of the vehicle on the upper side of the battery, and has a rail on which the seat body is slidably mounted, a front seat leg that sustains the floor panel and the front end of the rail, and the rail. A rear seat leg that extends downward from the rear end and then curves downward, said protective plate of a pair of rear seat legs spaced apart in the vehicle width direction. The position of the front end of the protective plate in the vehicle front-rear direction may be substantially the same as the rear end of the seat body which is slid to the frontmost side.

With such a configuration, the main battery is covered with the seat body and the protective plate and hidden even when the seat body is slid forward. As a result, it is possible to prevent luggage or the like from accidentally contacting the main battery, and the main battery can be protected more appropriately.

According to the battery-mounted structure disclosed herein, the main battery located under the seat can be better protected.

It is a schematic side view of the vehicle to which the battery-mounted structure is applied. It is a perspective view around the third row seat. It is the figure which looked at the third row seat from the rear. It is the figure which looked at the 3rd row sheet which does not have a protective plate and a sub-plate from the rear view.

Hereinafter, the battery mounting structure will be described with reference to the drawings. FIG. 1 is a schematic side view of the vehicle 10 to which this battery-mounted structure is applied. In each figure, "Fr", "Up", and "R" mean the front, the upper side, and the right side of the vehicle 10, respectively.

The vehicle 10 is a station wagon in which the luggage compartment 13 is integrated with the passenger compartment 12, and the first row seat 14, the second row seat 16, and the third row seat 18 are arranged in the passenger compartment 12 in order from the front. They are arranged side by side. The first row seats are the driver's seat and the passenger seat. The third row seat 18, that is, the rear of the last row seat, functions as a luggage compartment 13. A back door 11 for accessing the luggage compartment 13 is provided at the rear end of the vehicle 10.

Further, the vehicle 10 is an electric vehicle (for example, a hybrid vehicle or an electric vehicle) having a traveling motor (not shown) as one of the power sources. The vehicle 10 is also equipped with a main battery 20 that transfers electric power to and from the traveling motor. The main battery 20 is a rechargeable and dischargeable secondary battery, and is composed of, for example, a lithium ion battery or a nickel hydrogen battery. The main battery 20 supplies (that is, discharges) electric power to the traveling motor as needed. Further, the main battery 20 can be charged by electric power generated by a rotary electric machine (for example, a traveling motor) mounted on the vehicle or electric power supplied from the outside.

Such a main battery 20 has a high voltage and a large capacity, and is often larger than the auxiliary battery 22 (see FIG. 3) described later. In this example, the main battery 20 is arranged under the third row seat 18 in order to effectively utilize the space of the vehicle 10. This will be described in detail with reference to FIGS. 2 and 3. FIG. 2 is a perspective view of the periphery of the third row seat 18, and FIG. 3 is a view of the third row seat 18 as viewed from the rear.

As shown in FIG. 2, the third row seat 18 is a bench seat on which a plurality of people can sit side by side in the vehicle width direction. The third row seat 18 has a right side seat body 30R that can be seated by two people and a left side seat body 30L that can be seated by one person (hereinafter, when the right side and the left side are not distinguished). "Sheet body 30"). The right seat body 30R and the left seat body 30L are adjacent to each other in the vehicle width direction.

Each seat body 30 is placed and supported on the upper side of a pair of seat support frames 32 arranged at intervals in the vehicle width direction. Each seat support frame 32 has a rail 34, a front seat leg 36 connected to the front end of the rail 34, and a rear seat leg 38 connected to the rear end of the rail 34. The rail 34 is a member extending in the front-rear direction of the vehicle. The seat body 30 is mounted on the rail 34 so as to be slidable in the front-rear direction of the vehicle along the rail 34. FIG. 2 shows a state in which the seat body 30 is slid to the frontmost side.

The front seat leg 36 is a member that rises from the floor panel 24 and is connected to the front end of the rail 34. The rear seat leg 38 is a member that rises from the floor panel 24 and is connected to the rear end of the rail 34. The rear seat leg 38 includes a base 40 fixed to the floor panel 24, a rising portion 42 that rises diagonally upward and forward from the front end of the base 40, and an extension portion that extends from the front end of the rising portion 42 toward the front of the vehicle. It is roughly divided into 44. From another point of view, the joint portion between the extension portion 44 and the rising portion 42, in other words, the intermediate portion of the rear seat leg 38, is curved so as to move downward in the process of moving backward. The position of the front end of the rear seat leg 38 in the front-rear direction is substantially the same as that of the rear end of the seat body 30 slid to the frontmost side. Therefore, almost the entire rear seat leg 38 is exposed by sliding the seat body 30 forward.

A protective plate 50 is bridged between a pair of rear seat legs 38 provided for the left seat body 30L. The protective plate 50 is a sheet metal member that is curved so that its intermediate portion is curved downward in the process of moving backward in accordance with the shape of the rear seat leg 38. Both ends of the protective plate 50 in the vehicle width direction are joined to the rear seat leg 38. The front end of the protective plate 50 is near the front end of the rear seat leg 38, and the rear end of the protective plate 50 is near the rear end of the rising portion 42 of the rear seat leg 38. Further, a plurality of beads 52 (that is, local irregularities) elongated in the vehicle width direction are formed on the protective plate 50 at intervals in the front-rear direction. Such a protective plate 50 is provided to prevent the seat support frame 32 from collapsing, which will be described later.

Two sub-plates 54 are bridged between a pair of rear seat legs 38 provided for the right seat body 30R. Each sub-plate 54 has a flat plate shape that is not curved in the front-rear direction of the vehicle. Both ends of one sub-plate 54 in the vehicle width direction are joined to the extension portion 44, and both ends of the other sub-plate 54 in the vehicle width direction are joined to the rising portion 42. Further, the sub-plate 54 is also formed with a long bead 52 in the vehicle width direction.

As is clear from the explanation so far, the intermediate portion (extension portion 44 of the rail 34 and the rear seat leg 38) of each seat support frame 32 is located above the floor panel 24 and is located between the floor panel 24 and the floor panel 24. It forms some space in. The main battery 20 is arranged in the space between the intermediate portion of the seat support frame 32 and the floor panel 24. With such an arrangement, the space under the seat, which tends to be a dead space, can be effectively utilized.

As is clear from FIG. 2, the vehicle width direction dimension of the main battery 20 is a size that straddles both the right side seat body 30R and the left side seat body 30L, and the front-rear direction dimension of the main battery 20 is about the same as that of the rail 34. It has become. The rear end of the main battery 20 is located behind the rear end of the seat body 30 slid to the frontmost side. Therefore, when the seat body 30 is slid forward in the absence of the protective plate 50 and the sub-plate 54, the rear portion of the main battery 20 is exposed to the outside from between the pair of seat support frames 32.

As shown in FIG. 3, the auxiliary battery 22 is arranged on the outside of the third row seat 18 in the vehicle width direction (in this example, the left side of the third row seat 18). The auxiliary battery 22 stores electric power to be supplied to auxiliary equipment (for example, an air conditioner, an audio device, etc.) mounted on the vehicle 10. The auxiliary battery 22 has a lower voltage and a lower capacity and is smaller than the main battery 20. Such an auxiliary battery 22 has relatively high rigidity and is not easily crushed.

Further, a rear air conditioner unit 56 is arranged on the opposite side of the auxiliary battery 22 with the third row seat 18 interposed therebetween. The rear air conditioner unit 56 includes, for example, an evaporator and a blower fan. The rear air conditioner unit 56 has lower rigidity than the auxiliary battery 22 and is easily crushed.

Next, in this example, the reason for providing the protective plate 50 and the sub-plate 54 will be described with reference to FIG. FIG. 4 is a rear view of the third row seat 18 without the protective plate 50 and the sub-plate 54. Consider a side collision when an obstacle collides with the side surface of the vehicle 10. In this case, the collision load F may cause the auxiliary battery 22 (or the rear air conditioner unit 56) to fall inside in the vehicle width direction, that is, toward the third row seat 18. When the collapsed auxiliary battery 22 hits the seat body 30, the seat body 30 also tends to collapse inward in the vehicle width direction. At this time, the rail 34 connected to the seat body 30 and the seat legs 36 and 38 connected to the rail 34 also try to fall inward in the vehicle width direction. That is, the rail 34 and the seat legs 36, 38 (that is, the seat support frame 32) tend to fall in the direction of the arrow A in FIG. If the seat support frame 32 collapses in the direction of the arrow A, the seat support frame 32 may interfere with the upper surface of the main battery 20 and damage the main battery 20.

In this example, in order to prevent such damage to the main battery 20, a protective plate 50 and a sub-plate 54 are bridged between the pair of rear seat legs 38. By providing the protective plate 50 and the sub-plate 54, the protective plate 50 and the sub-plate 54 function like a refill bar, so that the movement of the rear seat leg 38 inward in the vehicle width direction is effective. Be regulated. As a result, the rear seat leg 38, the rail 34 connected to the rear seat leg 38, and the front seat leg 36 are effectively prevented from falling inward in the vehicle width direction, and the main battery 20 can be appropriately protected in the event of a side collision. ..

Here, when the seat support frame 32 tries to fall inward in the vehicle width direction, a compressing force is applied to the protective plate 50 and the sub-plate 54 in the vehicle width direction. In order to prevent the seat support frame 32 from collapsing, it is important that the protective plate 50 and the sub-plate 54 withstand this compressive force and do not deform.

In this example, the protective plate 50 and the sub-plate 54 are formed with a long bead 52 in the vehicle width direction. With such a configuration, the proof stress of the protective plate 50 and the sub-plate 54 against the compressive force in the vehicle width direction is increased as compared with the case without the bead 52, and the protective plate 50 and the sub-plate 54 are less likely to be deformed. .. Then, since the protective plate 50 and the sub-plate 54 are less likely to be deformed, the seat support frame 32 is more reliably suppressed from falling inward in the vehicle width direction, and the main battery 20 is more reliably protected.

Further, in this example, the protective plate 50 is curved so as to match the shape of the rear seat leg 38 so that the intermediate portion in the front-rear direction thereof goes downward in the process of going backward. With such a configuration, the proof stress of the protective plate 50 against the force of compression in the vehicle width direction is further improved and the protective plate 50 is less likely to be deformed as compared with the case where the protective plate 50 is not curved.

Here, only the protective plate 50 is curved and the sub-plate 54 is not curved because the protective plate 50 is adjacent to the auxiliary battery 22. That is, as described above, the rear air conditioner unit 56 has lower rigidity than the auxiliary battery 22 and is easily crushed. Therefore, when an obstacle collides with the right side surface of the vehicle 10, the rear air conditioner unit 56 is easily crushed by the collision load. Then, when the rear air conditioner unit 56 is crushed, most of the collision load is absorbed and the load transmitted to the seat support frame 32 becomes small. As a result, the sub-plate 54 bridged over the seat support frame 32 on the right side can easily withstand a collision load without being deformed even if it is not curved.

On the other hand, since the auxiliary battery 22 is not easily crushed, when an obstacle collides with the left side surface of the vehicle 10, most of the collision load is applied to the seat body 30 and the seat support frame 32 via the auxiliary battery 22. Be transmitted. That is, the protective plate 50 provided for the left side seat body 30L adjacent to the auxiliary battery 22 has a higher yield strength against the force of compression in the vehicle width direction than the sub plate 54 provided for the right side seat body 30R. Desired. Therefore, in this example, the protective plate 50 is curved in a substantially L shape in a lateral view to make it more difficult to deform. On the other hand, the sub-plate 54, which is not required to have a high yield strength, is not curved and has a flat plate shape to reduce the manufacturing cost.

By the way, as described above, when the seat body 30 is slid to the frontmost side, the rear end of the main battery 20 is located behind the rear end of the seat body 30. Therefore, in the absence of the protective plate 50 and the sub-plate 54, sliding the seat body 30 forward exposes the rear portion of the main battery 20. Here, the third row seat 18 on which the main battery 20 is arranged, that is, the rear side of the seat in the last row functions as a luggage compartment 13. Therefore, the user may put luggage behind the third row seat 18. At this time, the user may vigorously throw the luggage into the luggage compartment 13, or the luggage accommodated in the luggage compartment 13 may move significantly due to the shaking of the vehicle 10. In this case, if the main battery 20 is exposed in the luggage compartment 13, the luggage may collide with the main battery 20 and the main battery 20 may be damaged.

In this example, as described above, the protective plate 50 and the sub-plate 54 are bridged between the pair of rear seat legs 38. Further, the positions of the front ends of the protective plate 50 and the sub-plate 54 in the front-rear direction are substantially the same as those of the rear end of the seat body 30 slid to the frontmost side. Therefore, even if the seat body 30 is slid to the frontmost side, the rear portion of the main battery 20 is covered and hidden from above by the protective plate 50 and the sub-plate 54. As a result, the interference between the luggage placed in the luggage compartment 13 and the main battery 20 is effectively suppressed, and the main battery 20 is more appropriately protected.

As is clear from the above description, according to this example, since the seat support frame 32 can be suppressed from falling down, the main battery 20 arranged under the seat can be appropriately protected. The configuration described so far is an example, and at least a main battery 20 arranged under the seat body 30, a pair of seat support frames 32 arranged at intervals in the vehicle width direction, and the same. Other configurations may be modified as long as they have a protective plate 50 that spans between the seat support frames 32 and is curved in a substantially L shape in a lateral view. For example, in this example, the protective plate 50 is bridged only between the pair of seat support frames 32 provided for the seat body 30 on the left side (that is, the auxiliary battery 22 side), and the right side (that is, the rear air conditioner unit 56 side). ), A flat plate-shaped sub-plate 54 is bridged between the pair of seat support frames 32 provided for the seat body 30. However, the curved protective plate 50 may be placed on either the right side or the left side. With such a configuration, the seat support frame 32 on either the right side or the left side is less likely to fall down, so that the main battery 20 is more reliably protected.

Further, if the protective plate 50 is curved according to the shape of the seat support frame 32, its size and configuration may be changed. For example, the protective plate 50 may not have the bead 52 as long as it has sufficient strength. Further, the front end position of the protective plate 50 may be sufficiently rearward from the rear end of the seat body 30 slid to the frontmost side. Further, in this example, the seat support frame 32 is composed of the rail 34, the front seat leg 36, and the rear seat leg 38, but the seat support frame 32 straddles the main battery 20 from the upper side in the vehicle front-rear direction. , Other configurations may be used as long as the front-rear end of the vehicle is curved downward. For example, the seat support frame 32 may be composed of a single member. Further, in this example, the main battery 20 is arranged under the third row seat 18, but if the main battery 20 is under the rear row seat located behind the driver's seat 14, the main battery 20 is located in a different place. It may be arranged.

10 vehicle, 11 back door, 12 cabin, 13 luggage compartment, 14 driver's seat, 16 second row seat, 18 third row seat, 20 main battery, 22 auxiliary battery, 24 floor panel, 30L left seat body, 30R Right seat body, 32 seat support frame, 34 rails, 36 front seat legs, 38 rear seat legs, 40 bases, 42 rising parts, 44 extensions, 50 protective plates, 52 beads, 54 sub plates, 56 rear air conditioner units.

Claims (1)

The back row seats located behind the driver's seat and
The main battery located under the back row seat and
The back row seat is
The seat body and
A pair of seat support frames arranged at intervals in the vehicle width direction and on which the seat body is placed, each extending in the vehicle front-rear direction and straddling the main battery from above in the vehicle front-rear direction. In addition, a pair of seat support frames whose front-rear end of the vehicle is curved downward,
A protective plate spanned between the pair of seat support frames so as to cover the main battery from above, and the intermediate portion in the front-rear direction thereof moves downward in the process of moving backward according to the shape of the seat support frames. With a protective plate that is curved toward
The battery-mounted structure is characterized by having.

Images