JP2014133464A - Battery pack support structure for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To unfailingly protect a battery pack from contact with a spare tire even when an external force acts on a vehicle rear part and improve the workability of the assembly work etc.SOLUTION: A battery pack 5 at the rear side of a rear seat 1 is supported on a rear floor panel 4 using a battery frame 8. The battery frame 8 includes: a first frame part 12 which is long in a vehicle width direction arranged along a lower part of a vehicle rear surface of the battery pack 5; a second frame part 13 which is long in a vertical direction on a rear surface of a vehicle width direction end part of the battery pack 5; and a third frame part 14 which is obliquely connected with the first frame part 12 and the second frame part 13. A gas exhaust part 9 and a gas exhaust hose connection part 11 which are formed at the battery pack 5 are disposed in a triangle formed by the first frame part 12, the second frame part 13, and the third frame part 14 in a vehicle rear surface view. The third frame part 14 is connected with a vehicle rear end surface of the first frame part 12 and the vehicle rear end surface of the second frame part 13.

Description

  The present invention relates to a support structure for a vehicle battery pack, and is suitable, for example, when a battery pack arranged on the upper surface of a rear floor panel behind a rear seat is supported on the rear floor panel.

  In a battery pack used for an electric vehicle or a hybrid vehicle, the battery pack has a large volume due to the large electric capacity of the battery module. For this reason, the battery pack is often arranged on the upper surface of the rear floor panel positioned behind the rear seat. An example of such a vehicle battery pack support structure is described in Patent Document 1 below. In this battery pack support structure for a vehicle, the battery pack is stored in a housing having a parallelogram cross-sectional shape in a side view of the vehicle to form a battery assembly, and the battery assembly is disposed between the rear seat and the spare tire storage section. A structure for mounting and attaching a battery assembly to a rear floor panel via a stay is described.

JP 2006-62548 A

  However, in the vehicle battery pack support structure described in Patent Document 1, when an external force is applied to the rear portion of the vehicle, the vehicle rear portion of the spare tire is supported by the vehicle front portion of the spare tire stored in the spare tire storage portion. When the spare tire is lifted upward and the spare tire moves forward of the vehicle, the spare tire and the battery assembly may be in direct contact with each other. In addition, since the stay that holds the battery assembly on the rear floor panel protrudes from the rear end surface of the battery assembly to the rear of the vehicle, when an external force acts on the rear of the vehicle, the spare tire and the stay can easily come into contact with each other. Thereafter, the battery assembly may move forward of the vehicle due to external force. Further, when the battery assembly is provided with a gas discharge part or a gas discharge hose, if an external force acts on the rear part of the vehicle, the spare tire may come into contact with the gas discharge part or the gas discharge hose connecting part. In either case, there is a possibility that the battery assembly, that is, the battery pack cannot be reliably protected when an external force is applied to the rear portion of the vehicle. In addition, since the battery assembly has a parallelogram-shaped cross section when viewed from the side of the vehicle, it is difficult to carry and workability such as assembly work is not good.

  The present invention has been made paying attention to the above problems, and can reliably protect the battery pack even when an external force is applied to the rear portion of the vehicle, and improve workability. It is another object of the present invention to provide a vehicle battery pack support structure that can also be used.

  In order to solve the above-described problem, an aspect of the present invention provides a battery pack support structure for a vehicle that supports a battery pack disposed on an upper surface of a rear floor panel behind a rear seat on the rear floor panel. A spare tire storage portion that is formed on the rear floor panel on the rear side and stores a spare tire, a battery frame that supports the battery pack on the rear floor panel below the battery pack, and the battery frame, and the battery A first frame portion that is long in the vehicle width direction below the pack and along the vehicle rear surface of the battery pack, and constitutes the battery frame, at the vehicle width direction end portion of the battery pack and the vehicle rear surface of the battery pack A second frame portion that is longitudinal in the vehicle vertical direction along The battery frame comprises a predetermined horizontal position of the first frame portion that is separated from the second frame portion by a preset distance in the vehicle width direction, and a preset distance from the first frame portion in the vehicle vertical direction. A vehicle battery pack support structure, comprising: a third frame portion that connects a predetermined vertical position of the second frame portion separated by a distance from the first frame portion.

  Further, when a gas discharge portion for discharging gas and a gas discharge hose connecting portion for discharging discharged gas to the outside of the passenger compartment are formed at the vehicle width direction end portion of the battery pack, the gas discharge portion And the gas discharge hose connecting portion are arranged in a triangle formed by the first frame portion, the second frame portion, and the third frame portion in the vehicle rear view.

  The third frame portion is connected to a vehicle rear end surface of the first frame portion and a vehicle rear end surface of the second frame portion.

  Further, when the vehicle rear part of the spare tire moves forward of the vehicle with the vehicle front end of the spare tire as a fulcrum, the rubber part provided on the outer peripheral part of the spare tire contacts the third frame part. The third frame part is arranged in front of the rubber part in contact with the vehicle.

  Further, the vehicle is located below the triangle formed by the first frame portion, the second frame portion, and the third frame portion when viewed from the rear of the vehicle, and the vehicle is located behind the rear end surface of the third frame portion when viewed from the side of the vehicle. A rear side fastening portion that is located on the front side and fastens the battery frame to the rear floor panel is provided at a lower portion of the first frame portion.

  Also, an upwardly convex mounting portion having a front slope that is lower in the front of the vehicle in front of the vehicle and a rear slope that is lower in the rear of the vehicle in the rear of the vehicle is formed in front of the spare tire storage portion of the rear floor panel. A rear bracket that constitutes the rear fastening portion, a rear inclined surface that contacts the rear slope of the mount portion, and a position separated from the mount portion by a preset distance in front of the vehicle. And a front inclined surface facing the front slope.

  Further, the rear inclined surface and the axis are orthogonal to each other, and a bolt for fastening the rear inclined surface and the rear inclined surface is provided, and the head of the bolt is positioned in front of the vehicle behind the vehicle rear end surface of the first frame portion. When the head is viewed from the axial direction of the bolt, a notch is formed in the first frame portion so that the head and the first frame portion do not overlap in the axial direction of the bolt. .

  According to one aspect of the invention, the battery pack disposed on the upper surface of the rear floor panel at the rear of the rear seat is supported by the rear floor panel, and the spare is stored in the spare tire storage portion formed on the rear floor panel at the vehicle rear side of the battery pack. Store the tires. The battery pack is supported on the rear floor panel by a battery frame disposed below the battery pack. The battery frame includes a first frame portion that is long in the vehicle width direction below the battery pack and along the vehicle rear surface of the battery pack, and an upper and lower vehicle edge at the vehicle width direction end portion of the battery pack and along the vehicle rear surface of the battery pack. A second frame portion that is longitudinal in the direction, a predetermined horizontal position of the first frame portion that is separated from the second frame portion by a preset distance in the vehicle width direction, and a preset distance in the vehicle vertical direction from the first frame portion. 3rd frame part which connects the perpendicular | vertical predetermined position of the 2nd frame part which left | separated only. Accordingly, any one of the first frame portion, the second frame portion, and the third frame portion is disposed on the vehicle rear surface at the vehicle width direction end portion of the battery pack at least behind the vehicle. Therefore, even if an external force acts on the rear part of the vehicle and the rear part of the spare tire stored in the spare tire storage part lifts up with the front part of the vehicle as a fulcrum and further moves forward, the spare tire Contact is made with either the second frame part or the third frame part, and direct contact between the battery pack and the spare tire is avoided. Therefore, the battery pack can be reliably protected even when an external force acts on the rear portion of the vehicle. In addition, since the third frame portion that is obliquely connected to the first frame portion and the second frame portion can be gripped, the positioning of the battery frame and the assembly work of the battery pack are facilitated, and the workability is improved. improves.

  Further, when a gas discharge part for discharging gas and a gas discharge hose connection part for discharging discharged gas to the outside of the vehicle compartment are formed at the vehicle width direction end of the battery pack, the gas discharge part and the gas The discharge hose connecting portion is arranged in a triangle formed by the first frame portion, the second frame portion, and the third frame portion in the vehicle rear view. Therefore, even if an external force acts on the rear part of the vehicle and the rear part of the spare tire stored in the spare tire storage part lifts up with the front part of the vehicle as a fulcrum and further moves forward, the spare tire Direct contact between the gas exhaust portion and the gas exhaust hose connecting portion and the spare tire is avoided by contacting the triangular portion constituted by the two frame portions and the third frame portion. Therefore, even when an external force is applied to the rear part of the vehicle, it is possible to protect the gas discharge part and the gas discharge hose connection part that should be protected intensively, and as a result, it is possible to reliably protect the battery pack. .

  The third frame portion is connected to the vehicle rear end surface of the first frame portion and the vehicle rear end surface of the second frame portion. Thereby, a 3rd flame | frame part can be arrange | positioned most at the vehicle rear side among a battery pack and a battery frame. Therefore, even if an external force acts on the rear part of the vehicle and the rear part of the spare tire stored in the spare tire storage part lifts up with the front part of the vehicle as a fulcrum and moves further forward of the vehicle, the spare tire is first applied to the third frame part. To touch. The load applied to the third frame part is distributed to the first frame part and the second frame part, and the load can be received by the three frame parts. Thereby, plastic deformation of the battery frame can be prevented, the spare tire can be prevented from contacting the battery pack, and the battery frame can be prevented from contacting the battery pack, and the battery pack is reliably protected. be able to.

  Further, when the vehicle rear portion of the spare tire moves forward of the vehicle with the vehicle front end portion of the spare tire as a fulcrum, the rubber portion of the outer periphery of the spare tire comes in front of the vehicle so that the rubber portion of the spare tire contacts the third frame portion. A third frame portion was arranged. Generally, in the spare tire, the rubber portion at the outer peripheral portion protrudes outward in the spare tire axial direction rather than the wheel portion at the center portion. Therefore, even if an external force acts on the rear part of the vehicle, the rear part of the spare tire stored in the spare tire storage part lifts up with the front part of the vehicle as a fulcrum, and further moves forward of the vehicle, the rubber part of the spare tire remains in the third frame. Contact the part first. Since the rubber portion of the spare tire is more flexible than the wheel portion, it is possible to reduce the spare tire contact load that acts on the battery frame from the third frame portion, and it is possible to reliably protect the battery pack.

  In addition, a rear fastening part provided at the lower part of the first frame part for fastening the battery frame to the rear floor panel is a triangle composed of the first frame part, the second frame part, and the third frame part in the vehicle rear view. And the vehicle front side with respect to the vehicle rear end surface of the third frame portion in a side view of the vehicle. That is, the rear side fastening part can be arranged in the high rigidity part by the three frame parts of the first frame part, the second frame part and the third frame part, and the load applied to the rear side fastening part can be reduced. . Further, even if an external force acts on the rear part of the vehicle, the rear part of the spare tire stored in the spare tire storage part is lifted with the front part of the vehicle as a fulcrum, and even if it moves further forward of the vehicle, the spare tire is directly applied to the rear fastening part. Contact can be prevented, and the rear fastening portion can be protected. Thereby, it is possible to prevent the rear fastening portion from being separated from the rear floor panel by an external force, and the battery pack can be held at the specified position, so that the battery pack can be reliably protected.

  Further, an upward convex mounting portion having a front slope that is lower in the front of the vehicle in front of the vehicle and a rear slope that is lower in the rear of the vehicle in the rear of the vehicle is formed in front of the spare tire storage portion of the rear floor panel. Further, the rear bracket constituting the rear fastening portion includes a rear inclined surface that comes into contact with the rear inclined surface of the mount portion, and a front inclined surface of the mount portion at a position separated from the mount portion by a preset distance in front of the vehicle. And a front inclined surface facing the surface. Therefore, when the battery pack is assembled to the battery frame and assembled to the rear floor panel, by pushing or pulling the third frame portion in the vehicle front-rear direction, the rear bracket and the rear slope are mounted on the rear slope and front slope. The positions of the rear inclined surface of the mount portion and the rear inclined surface of the rear bracket can be finely adjusted to a specified position while bringing the side inclined surface and the front inclined surface into contact with each other. Thus, when the battery pack is mounted on the rear floor panel, the operator can position the battery pack and the battery frame at a specified position without working while looking at the rear side fastening portion and the mount portion. Workability can be improved by reducing the burden.

  Further, the head portion of the bolt that fastens the rear inclined surface and the rear inclined surface with the rear inclined surface and the axis orthogonal to each other is disposed in front of the vehicle rear end surface of the first frame portion. Then, when the bolt head is viewed from the axial direction of the bolt, a cutout is formed in the first frame portion so that the head and the first frame portion do not overlap in the axial direction of the bolt. Therefore, it is possible to reduce the shear load of the bolt when an external force is applied to the battery frame from the rear horizontal direction of the vehicle, and it is possible to protect the battery pack by preventing the bolt from being detached from the rear floor panel. Further, the head of the bolt can be brought close to the connection portion of the bracket to the first frame portion, and the distance from the bolt head to the rear bracket connection portion can be minimized. Therefore, deformation between the bolt head and the rear bracket connecting portion can be prevented, and the battery frame can be reliably prevented from coming off the rear floor panel. Further, when the battery frame is assembled to the rear floor panel, a bolt fastening tool can be used in contact with the bolt head from the notch, and the bolt can be securely tightened. Thereby, even if it makes a bolt head and a rear bracket connection part approach, an operator's work burden is not increased and workability | operativity can be improved.

It is a top view of the vehicle rear part which shows 1st Embodiment to which the battery pack support structure for vehicles of this invention was applied. FIG. 2 is a plan view of a rear floor panel and a battery frame to which the vehicle battery pack support structure of FIG. 1 is applied. It is a perspective view of the battery pack support structure for vehicles of FIG. It is a perspective view of the battery pack support structure for vehicles of FIG. It is a side view of the battery pack support structure for vehicles of FIG. It is XX sectional drawing of FIG. FIG. 2 is an enlarged rear view of a gas discharge portion and a rear side fastening portion to which the vehicle battery pack support structure of FIG. 1 is applied. It is a longitudinal cross-sectional view of FIG. It is a side view of a vehicle rear part when an external force acts on the vehicle rear part. FIG. 6 is a rear view of the rear portion of the vehicle when an external force is applied to the rear portion of the vehicle. It is a top view of the vehicle rear part when external force acts on the vehicle rear part. It is a rear elevation view of the rear part of the vehicle showing a second embodiment to which the vehicle battery pack support structure of the present invention is applied.

  Next, an embodiment of a vehicle battery pack support structure of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing a first embodiment to which a vehicle battery pack cooling structure of the present invention is applied, and FIG. 2 is a plan view of a rear floor panel and a battery frame to which the vehicle battery pack support structure of FIG. 1 is applied. 3, FIG. 3 and FIG. 4 are perspective views of the vehicle battery pack support structure of FIG. 1 as seen from different directions. The vehicle of the present embodiment is an electric vehicle or a hybrid vehicle having two rows of front and rear seats, that is, a seat row. A rear seat 1 corresponding to a rear seat includes a seat cushion 2 on which an occupant is seated and a seat back 3 on which the occupant is seated. The rear seat 1 shown in FIGS. 1 and 2 is long in the vehicle width direction so that 2 to 3 passengers can be seated. 3 and 4, the illustration of the seat back is omitted.

  A front of the vehicle from the seat back 3 of the rear seat 1 is a vehicle compartment, and a rear of the vehicle from the seat back 3 of the rear seat 1 is a luggage room generally called a luggage room. The lower surface of the passenger compartment has a floor surface constituted by a front floor panel, and the lower surface of the cargo compartment has a bottom surface (floor surface) formed by a rear floor panel 4. The front floor panel and the rear floor panel 4 of this embodiment are a series, and a stepped portion is formed at the connecting portion between the two, and the seat cushion 2 of the rear seat 1 is disposed on the stepped portion. . In the present embodiment, the battery pack 5 is disposed on the upper surface of the rear floor panel 4 behind the rear seat 1 in the vehicle.

  In the battery pack 5, a plurality of battery modules composed of a large number of cells are housed, electric power is stored in each battery module, and the stored electric power is released. In the battery pack 5 of this embodiment, in order to discharge the gas generated by the power storage / discharge action of the battery module, for example, a gas discharge portion 9 is formed at the vehicle left end portion of the battery pack 5 shown in FIG. A gas discharge hose 10 is connected to the gas discharge unit 9 so that the generated gas is discharged outside the vehicle, specifically below the rear floor panel 4. A portion where the gas discharge hose 10 is connected to the gas discharge portion 9 is called a gas discharge hose connection portion 11.

  In the present embodiment, a spare tire storage portion 7 that stores the spare tire 6 is formed on the vehicle rear side of the battery pack 5. The spare tire storage portion 7 is a recess formed by recessing the rear floor panel 4 downward. For example, as shown in FIG. 5, the upper surface of the spare tire 6 stored in the spare tire storage portion 7 is set to be lower than the rear floor panel 4 on which the battery pack 5 is mounted. 2 to 4, the illustration of the spare tire is omitted. The spare tire storage unit 7 may be covered with a separate lid member. In the luggage compartment, the rear floor panel 4 may be covered with a blindfold cover generally called a tonneau cover.

  5 is a side view of the vehicle battery pack support structure of FIG. 1, FIG. 6 is a sectional view taken along line XX of FIG. 1, and FIG. 7 is a gas discharge portion to which the vehicle battery pack support structure of FIG. FIG. 8 is a longitudinal sectional view of FIG. 7. In the present embodiment, the battery pack 5 is supported on the rear floor panel 4 by the battery frame 8. The battery frame 8 is disposed below the battery pack 5 and fixes the battery pack 5 to the rear floor panel 4 while supporting the battery pack 5. The battery frame 8 mainly has a ladder-type frame structure as shown in FIG. 2, for example, and is configured by assembling a frame member that is long in the vehicle width direction and a frame member that is long in the vehicle front-rear direction into a ladder shape.

  As a feature of the battery frame 8 of the present embodiment, a first frame portion that constitutes a part of the ladder-type battery frame 8 and is long in the vehicle width direction below the battery pack 5 and along the vehicle rear surface of the battery pack 5. 12 is provided. In addition, the vehicle width direction end portion (vehicle left end portion) of the battery pack 5 in which the gas discharge portion 9 and the gas discharge hose connecting portion 11 described above are provided, and the vehicle vertical direction along the vehicle rear surface of the battery pack 5. A long second frame portion 13 is erected vertically from the first frame portion 12. Further, the second frame portion 13 is separated from the second frame portion 13 by a preset distance in the vehicle width direction by a predetermined distance in the first frame portion 12 and the second frame portion 12 is separated from the first frame portion 12 by a preset distance in the vehicle vertical direction. A predetermined vertical position of the frame portion 13 is connected by a third frame portion 14.

  As a result, the gas discharge portion 9 and the gas discharge hose connection portion 11 formed at the vehicle width direction end portion (the vehicle left end portion) of the battery pack 5 are shown in FIG. Arranged in a triangle formed by the first frame portion 12, the second frame portion 13, and the third frame portion 14. In the present embodiment, as clearly shown in FIG. 6, the third frame portion 14 is connected to the vehicle rear end surface of the first frame portion 12 and the vehicle rear end surface of the second frame portion 13. Accordingly, the third frame portion 14 is disposed on the most rear side of the battery frame 8. Further, as described in detail later, when the rear part of the spare tire 6 moves forward of the vehicle with the front end of the spare tire 6 as a fulcrum, the rubber part of the outer peripheral part of the spare tire 6 is the third frame part 14. The third frame part 14 is arranged in front of the rubber part in contact with the rubber part so as to come into contact with the vehicle.

  The battery frame 8 is fixed to the rear floor panel 4 at three fastening portions on the vehicle front side and two fastening portions on the vehicle rear side. Among these, the details of the rear fastening portion 15 on the third frame portion 14 side, that is, the gas discharge portion 9 and the gas discharge hose connecting portion 11 side are shown in FIGS. In addition, the rear side fastening part on the opposite side in the vehicle width direction has the same structure. As clearly shown in FIG. 7, the rear fastening portion 15 is provided below the first frame portion 12. Further, the rear side fastening portion 15 is located below the triangle formed by the first frame portion 12, the second frame portion 13, and the third frame portion 14 in the vehicle rear view, and in the vehicle side view, The three frame portions 14 are located on the vehicle front side from the vehicle rear end surface.

  The rear fastening portion 15 is configured by welding and fixing a rear bracket 16 made of a plate material to the lower surface of the battery frame 8. On the other hand, on the rear floor panel 4, an upward convex mounting portion 19 is formed in front of the vehicle relative to the spare tire storage portion 7 in order to fix the rear bracket 16. The mount portion 19 is formed with a front slope 17 that is lowered toward the front of the vehicle at the front of the vehicle and a rear slope 18 that is lowered toward the rear of the vehicle at the rear of the vehicle. On the other hand, the rear bracket 16 on the lower surface of the battery frame 8 has a rear inclined surface 20 that contacts the rear inclined surface 18 of the mount portion 19 and a position away from the mount portion 19 by a preset distance in front of the vehicle. Thus, a front inclined surface 21 facing the front inclined surface 17 of the mount portion 19 is formed.

  In a state where the rear inclined surface 20 of the rear bracket 16 is applied to the rear inclined surface 18 of the mount portion 19, a bolt 22 is inserted into both of them. For example, the bolt 22 is inserted into the female screw formed on the rear inclined surface 18 of the mount portion 19. The rear bracket 16, that is, the battery frame 8 is fixed to the mount portion 19, that is, the rear floor panel 4. Therefore, the axis of the bolt 22 is orthogonal to the rear inclined surface 20 of the rear bracket 16. In a state where the bolt 22 is fastened to the female screw on the rear slope 18 of the mount portion 19, the head portion 23 of the bolt 22 is positioned in front of the vehicle with respect to the vehicle rear end surface of the first frame portion 12. Then, when the head 23 is viewed from the axial direction of the bolt 22, a notch 24 is formed in the first frame 12 so that the head 23 and the first frame 12 do not overlap in the axial direction of the bolt 22. did.

  9 is a side view of the rear part of the vehicle when an external force is applied to the rear part of the vehicle, FIG. 10 is a rear view of the rear part of the vehicle when an external force is applied to the rear part of the vehicle, and FIG. 11 is a case where the external force is applied to the rear part of the vehicle. It is a top view of the vehicle rear part. In these drawings, an external force acts on the rear part of the vehicle from the rear of the vehicle, and the external force lifts the rear part of the spare tire 6 stored in the spare tire storage part 7 with the front part of the vehicle as a fulcrum. The spare tire 6 has shown the state which moved to the vehicle front. When an external force acts on the rear portion of the vehicle from the rear of the vehicle, the front portion of the spare tire 6 comes into contact with the front end portion of the spare tire storage portion 7. In this state, when an external force from the rear of the vehicle further acts, the vehicle rear portion of the spare tire 6 is lifted upward with the vehicle front portion of the spare tire 6 in contact with the vehicle front end portion of the spare tire storage portion 7 as a fulcrum. . In this state, the axis of the spare tire 6 is in the vehicle front-rear direction. In this state, when an external force from the rear of the vehicle further acts, the spare tire 6 is moved to the front of the vehicle with the axis line directed in the vehicle front-rear direction, and approaches the battery pack 5.

  In the present embodiment, the battery pack 5 disposed on the upper surface of the rear floor panel 4 behind the rear seat 1 is supported by the rear floor panel 4, and the spare tire storage formed on the rear floor panel 4 on the rear side of the vehicle with respect to the battery pack 5. The spare tire 6 is stored in the part 7. The battery pack 5 is supported on the rear floor panel 4 by a battery frame 8 disposed below the battery pack 5. The battery frame 8 includes a first frame portion 12 that is long in the vehicle width direction below the battery pack 5 and along the vehicle rear surface of the battery pack 5, a vehicle width direction end portion of the battery pack 5, and a vehicle of the battery pack 5. A second frame portion 13 that is long in the vehicle up-down direction along the rear surface, and a predetermined horizontal position of the first frame portion 12 that is separated from the second frame portion 13 by a preset distance in the vehicle width direction, and the first frame portion 12. And a third frame portion 14 that connects a predetermined vertical position of the second frame portion 13 that is separated by a preset distance in the vehicle vertical direction. Accordingly, any one of the first frame portion 12, the second frame portion 13, and the third frame portion 14 is disposed on the vehicle rear surface at the vehicle width direction end portion of the battery pack 5 at least behind the vehicle. Therefore, even if an external force acts on the rear portion of the vehicle and the rear portion of the spare tire 6 stored in the spare tire storage portion 7 is lifted with the front portion of the vehicle as a fulcrum and further moves forward, the spare tire 6 is Contact with any of the frame part 12, the second frame part 13, and the third frame part 14 is avoided, and direct contact between the battery pack 5 and the spare tire 6 is avoided. Therefore, the battery pack 5 can be reliably protected even when an external force is applied to the rear portion of the vehicle. Further, since the third frame portion 14 that is obliquely connected to the first frame portion 12 and the second frame portion 13 can be gripped, the positioning of the battery frame 8 and the assembly work of the battery pack 5 are facilitated. Thus, workability is improved.

  Moreover, when the gas discharge part 9 for discharging | emitting gas and the gas discharge hose connection part 11 for discharging | emitting discharged | emitted gas out of a vehicle interior are formed in the vehicle width direction edge part of the battery pack 5, gas discharge | emission is performed. The part 9 and the gas discharge hose connecting part 11 are arranged in a triangle formed by the first frame part 12, the second frame part 13, and the third frame part 14 in the vehicle rear view. Therefore, even if an external force acts on the rear portion of the vehicle and the rear portion of the spare tire 6 stored in the spare tire storage portion 7 is lifted with the front portion of the vehicle as a fulcrum and further moves forward, the spare tire 6 is The triangular part comprised by the frame part 12, the 2nd frame part 13, and the 3rd frame part 14 is contacted, and the direct contact with the gas exhaust part 9, the gas exhaust hose connection part 11, and the spare tire 6 is avoided. Therefore, even when an external force is applied to the rear portion of the vehicle, the gas discharge portion 9 and the gas discharge hose connection portion 11 that should be intensively protected can be protected, and as a result, the battery pack 5 is reliably protected. be able to. Since the gas discharge part 9 and the gas discharge hole connection part 11 are vulnerable to impacts in the battery pack 5, it is particularly necessary to protect the gas discharge part 9 and the gas discharge hose connection part 11.

  The third frame portion 14 is connected to the vehicle rear end surface of the first frame portion 12 and the vehicle rear end surface of the second frame portion 13. Thereby, among the battery pack 5 and the battery frame 8, the third frame portion 14 can be arranged on the most rear side of the vehicle. Therefore, even if an external force acts on the rear part of the vehicle and the rear part of the spare tire 6 stored in the spare tire storage part 7 is lifted with the front part of the vehicle as a fulcrum and further moves forward, The frame portion 14 is first contacted. The load applied to the third frame portion 14 is distributed to the first frame portion 12 and the second frame portion 13, and the load can be received by the three frame portions. Thereby, plastic deformation of the battery frame 8 can be prevented, and the spare tire 6 can be prevented from contacting the battery pack 5 and the battery frame 8 can be prevented from contacting the battery pack 5. 5 can be reliably protected.

  In addition, when the vehicle rear portion of the spare tire 6 moves forward of the vehicle with the vehicle front end portion of the spare tire 6 as a fulcrum, the rubber portion in contact with the outer peripheral portion of the spare tire 6 comes into contact with the third frame portion 14. The third frame portion 14 is disposed in front of the vehicle. In general, the spare tire 6 has an outer peripheral rubber portion protruding outward in the axial direction of the spare tire 6 rather than a wheel portion in the center. Therefore, even if an external force acts on the rear part of the vehicle and the rear part of the spare tire 6 stored in the spare tire storage part 7 is lifted with the front part of the vehicle as a fulcrum and further moves forward, the rubber part of the spare tire 6 Comes into contact with the third frame portion 14 first. Since the rubber portion of the spare tire 6 is more flexible than the wheel portion, the contact load of the spare tire 6 acting on the battery frame 8 from the third frame portion 14 can be reduced, and the battery pack 5 can be reliably protected. .

  Further, a rear side fastening portion 15 provided at a lower portion of the first frame portion 12 for fastening the battery frame 8 to the rear floor panel 4 is provided with the first frame portion 12, the second frame portion 13, and the third frame portion as viewed from the rear of the vehicle. It is arranged below the triangle formed by the frame portion 14 and on the vehicle front side of the rear end surface of the third frame portion 14 in a side view of the vehicle. That is, the rear side fastening part 15 can be arranged in a highly rigid part by the three frame parts of the first frame part 12, the second frame part 12 and the third frame part 13, and the load applied to the rear side fastening part 15 is Can be reduced. Further, even if an external force acts on the rear part of the vehicle, the rear part of the spare tire 6 stored in the spare tire storage part 7 lifts up with the front part of the vehicle as a fulcrum, and further moves forward, the spare tire 6 Direct contact with the fastening portion 15 can be prevented, and the rear fastening portion 15 can be protected. As a result, the rear fastening portion 15 can be prevented from being separated from the rear floor panel 4 by an external force, and the battery pack 5 can be held at the specified position, so that the battery pack 5 can be reliably protected. .

  Further, an upward convex mount portion 19 having a front slope 17 that is lowered in front of the vehicle and a rear slope 18 that is lowered in the rear of the vehicle is located in front of the spare tire storage portion 7 of the rear floor panel 4. To form. Further, the rear bracket 16 constituting the rear fastening portion 15 includes a rear inclined surface 20 in contact with the rear slope 18 of the mount portion 19 and a position separated from the mount portion 19 by a preset distance in front of the vehicle. Thus, the front inclined surface 21 facing the front inclined surface 17 of the mount portion 19 is formed. Accordingly, when the battery pack 5 is assembled to the battery frame 8 and assembled to the rear floor panel 4, the rear slope 18 and the front slope 17 of the mount portion 19 are obtained by pushing or pulling the third frame portion 14 in the vehicle longitudinal direction. The position of the rear inclined surface 18 of the mount portion 19 and the rear inclined surface 20 of the rear bracket 16 is finely adjusted to a specified position while the rear inclined surface 20 and the front inclined surface 21 of the rear bracket 16 are brought into contact with each other. can do. Thus, when mounting the battery pack 5 on the rear floor panel 4, the operator positions the battery pack 5 and the battery frame 8 at the specified positions without working while looking at the rear side fastening portion 15 and the mount portion 19. Therefore, the burden on the operator can be reduced and workability can be improved.

  The head 23 of the bolt 22 that fastens the rear inclined surface 20 and the rear inclined surface 18 is disposed in front of the vehicle rear end surface of the first frame portion 12. When the bolt head 23 is viewed from the axial direction of the bolt 22, the notch 24 is formed in the first frame portion 12 so that the head 23 and the first frame portion 12 do not overlap in the axial direction of the bolt 22. Formed. Accordingly, it is possible to reduce the shear load of the bolt 22 when an external force is applied to the battery frame 8 from the rear horizontal direction of the vehicle, thereby preventing the bolt 22 from being detached from the rear floor panel 4 and protecting the battery pack 5. it can. Further, the head portion 23 of the bolt 22 can be brought close to the connecting portion of the rear bracket 16 to the first frame portion, and the distance from the bolt head portion 23 to the connecting portion of the rear bracket 16 can be minimized. it can. Therefore, deformation between the bolt head 23 and the rear bracket 16 connection portion can be prevented, and the battery frame 8 can be reliably prevented from coming off the rear floor panel 4. Further, when the battery frame 8 is assembled to the rear floor panel 4, a tool for fastening the bolt 22 can be used by contacting the bolt head 23 from the notch 24, and the bolt 22 can be securely tightened. Thereby, even if it makes the bolt head 23 and the rear bracket 16 connection part approach, an operator's work burden is not increased and workability | operativity can be improved.

  FIG. 12 is a rear view of the rear portion of the vehicle showing a second embodiment of the vehicle battery pack support structure of the present invention. Also in this embodiment, the gas discharge part 9 and the gas discharge hose connection part 11 of the battery pack 5 are formed only at one end in the vehicle width direction of the battery pack 5, specifically, the left end in FIG. On the other hand, in the present embodiment, the second frame portion 13 and the third frame portion 14 are also provided on the right end portion of the battery pack 5 in which the gas discharge portion 9 and the gas discharge hose connection portion 11 are not formed. . Similar to the first embodiment, the third frame portion 13 is the vehicle width direction end portion (vehicle right end portion) of the battery pack 5 and extends in the vehicle vertical direction along the vehicle rear surface of the battery pack 5. And is erected in the vertical direction from one frame portion 12. The third frame portion 14 is preset in the horizontal predetermined position of the first frame portion 12 that is a predetermined distance in the vehicle width direction from the second frame portion 13 and in the vehicle vertical direction from the first frame portion 12. The vertical predetermined positions of the second frame portion 13 separated by a certain distance are connected.

  Further, the third frame portion 14 is connected to the vehicle rear end surface of the first frame portion 12 and the vehicle rear end surface of the second frame portion 13, or the vehicle of the spare tire 6 with the vehicle front end portion of the spare tire 6 as a fulcrum. If the rear part moves forward of the vehicle, the third frame part 14 may be arranged in front of the vehicle of the rubber part in contact so that the rubber part of the outer peripheral part of the spare tire 6 contacts the third frame part 14. Good. Further, the rear fastening portion 15 below the third frame portion 14 is disposed below the triangle formed by the first frame portion 12, the second frame portion 13, and the third frame portion 14 in the rear view of the vehicle. In the vehicle side view, the third frame portion 14 may be disposed on the vehicle front side with respect to the vehicle rear end surface. The specific configuration of the rear fastening portion 15 may be the same as that of the first embodiment.

  In the present embodiment, since the configuration of the right end portion of the vehicle of the battery frame 8 is the same as that of the first embodiment, the rigidity and strength of the right end portion of the vehicle of the battery frame 8 can be improved. The vehicle right end of the battery pack 5 can also be positively protected. In addition, if the notch 24 is provided in the first frame portion 12 so that the bolt 22 for fixing the rear bracket 16 to the mount portion 19 at the rear fastening portion 15 does not interfere with the first frame portion 12, the assembly is performed. Workability is improved.

DESCRIPTION OF SYMBOLS 1 Rear seat 2 Seat cushion 3 Seat back 4 Rear floor panel 5 Battery pack 6 Spare tire 7 Spare tire storage part 8 Battery frame 9 Gas exhaust part 10 Gas exhaust hose 11 Gas exhaust hose connection part 12 1st frame part 13 2nd frame part 14 Third frame portion 15 Rear fastening portion 16 Rear bracket 17 Front slope 18 Rear slope 19 Mount portion 20 Rear slope 21 Front slope 22 Bolt 23 Head

Claims (7)

In the vehicle battery pack support structure for supporting the battery pack disposed on the upper surface of the rear floor panel behind the rear seat on the rear floor panel,
A spare tire storage portion that is formed on the rear floor panel on the vehicle rear side of the battery pack and stores a spare tire;
A battery frame for supporting the battery pack on the rear floor panel below the battery pack;
A first frame portion that constitutes the battery frame and is long in the vehicle width direction below the battery pack and along the vehicle rear surface of the battery pack;
A second frame portion that constitutes the battery frame and is long in the vehicle vertical direction along the vehicle rear surface of the battery pack at the vehicle width direction end portion of the battery pack;
A predetermined horizontal position of the first frame portion that constitutes the battery frame and is separated from the second frame portion by a preset distance in the vehicle width direction, and a preset distance in the vehicle vertical direction from the first frame portion. A third frame part connecting vertical predetermined positions of the second frame part separated by a distance;
A battery pack support structure for a vehicle, comprising: When a gas discharge part for discharging gas and a gas discharge hose connection part for discharging discharged gas to the outside of the vehicle compartment are formed at the vehicle width direction end of the battery pack,
The gas exhaust part and the gas exhaust hose connecting part are arranged in a triangle formed by the first frame part, the second frame part, and the third frame part in a rear view of the vehicle. The vehicle battery pack support structure according to claim 1.   3. The vehicle battery pack support structure according to claim 1, wherein the third frame portion is connected to a vehicle rear end surface of the first frame portion and a vehicle rear end surface of the second frame portion.   When the rear part of the spare tire moves forward of the vehicle with the front end of the spare tire as a fulcrum, the rubber part provided on the outer peripheral part of the spare tire comes into contact with the third frame part. The vehicle battery pack support structure according to claim 3, wherein the third frame portion is disposed in front of the rubber portion of the vehicle.   Positioned below the triangle formed by the first frame portion, the second frame portion, and the third frame portion when viewed from the rear of the vehicle, and the vehicle front side relative to the vehicle rear end surface of the third frame portion when viewed from the side of the vehicle The vehicle battery pack support structure according to claim 3 or 4, wherein a rear side fastening portion for fastening the battery frame to the rear floor panel is provided at a lower portion of the first frame portion. .   An upwardly convex mounting portion having a front slope that falls in front of the vehicle in front of the vehicle and a rear slope that falls in the rear of the vehicle in the rear of the vehicle is formed in front of the spare tire storage portion of the rear floor panel. A rear bracket that constitutes the rear fastening portion, a rear inclined surface that contacts the rear slope of the mount portion, and a position separated from the mount portion by a preset distance in front of the vehicle. 6. The vehicle battery pack support structure according to claim 5, further comprising a front inclined surface facing the front slope. The rear inclined surface and the axis are orthogonal, and includes a bolt that fastens the rear inclined surface and the rear inclined surface,
The bolt head is disposed in front of the vehicle rear end surface of the first frame portion;
When the head is viewed from the axial direction of the bolt, a cutout is formed in the first frame portion so that the head and the first frame portion do not overlap in the axial direction of the bolt. The vehicle battery pack support structure according to claim 6.

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