JP4890523B2 - Battery support structure for vehicle - Google Patents

Description

  The present invention relates to a battery support structure for a vehicle such as an automobile, and more particularly to an improvement in a battery support structure for a vehicle that travels using an electric motor such as a hybrid vehicle as a drive source.

2. Description of the Related Art Conventionally, in the above-mentioned vehicle, when a vehicle collides, the battery is moved in the same direction as the impact so that the impact energy is absorbed and the impact energy input to the battery is reduced (patents described later). Reference 1).
JP 2006-182099 A

  By the way, in the battery mounting structure disclosed in Patent Document 1, a long hole extending in the same direction as the impact input direction is provided in the battery frame, and the battery moves along the long hole together with the battery frame at the time of impact input. Therefore, when the impact input direction is not the same direction as the long hole, the impact energy cannot be absorbed efficiently, and when the battery collides with an obstacle, no measures are taken to avoid damage to the battery.

  The present invention has been made in such a way that when a succeeding vehicle collides with a vehicle equipped with a battery, the battery rides on a rear suspension beam arranged in front of the vehicle so that damage to the battery can be prevented in advance. An object of the present invention is to provide a battery support structure for a simple vehicle.

In order to achieve the above object, the invention according to claim 1 includes a rear floor panel that is bent in the vehicle width direction and formed into a cross-sectional pit shape in rear view, a rear floor extension that is coupled to the front end of the rear floor panel and rises upward. A battery in a vehicle in which a battery housing recess is formed by a rear panel that is coupled to the rear end of the rear floor panel and rises upward, and a battery that is suspended from the rear frame via a suspension frame is housed in the battery housing recess. A support structure,
The front portion of the rear floor panel RP is formed as a front-upward inclined surface, and a lower edge flange portion of the rear floor extension is coupled thereto to form a sloped corner surface that slopes up frontward at the lower front portion of the battery housing recess. The inclined corner surface faces the rear upper surface of the rear suspension beam for the rear wheel suspension, which is disposed in the lower front portion of the battery housing recess.

  In order to achieve the above object, according to a second aspect of the present invention, in the first aspect, the lower edge flange portion of the rear floor extension is formed as an inclined surface inclined rearwardly, and the flange portion is formed on the rear floor. It is characterized by being coupled to the lower surface of the front portion of the panel.

  According to the invention described in each of the claims, in a vehicle having a battery mounted on the rear part of the vehicle, the battery storage recess is run along the rear suspension beam at the time of rear collision of the following vehicle, so that the battery collides with the rear suspension beam. Can be avoided and its damage can be prevented.

  According to the second aspect of the present invention, the lower edge flange portion of the rear floor extension is formed on the inclined surface inclined downward, and the flange portion is coupled to the lower surface of the inclined surface of the rear floor panel to connect the battery housing recess. Since the inclined corner surface is formed in the lower part of the front surface of the vehicle, damage to the battery can be prevented without opening the inclined corner surface due to an impact at the time of rear collision of the following vehicle.

  Embodiments of the present invention will be described below based on the embodiments of the present invention shown in the accompanying drawings.

  FIG. 1 is a rear perspective view of a vehicle body of a hybrid vehicle equipped with a battery support structure of the present invention, FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1, and FIG.

  In FIG. 1, a rear floor panel RFP at the rear of the vehicle body of the hybrid vehicle V is bent in the vehicle width direction and formed in a cross-sectional pit shape when viewed from the rear of the vehicle V. The bottom wall portion 1 and its bottom wall portion 1 Left and right side wall portions 2, 2 rising from both left and right sides, and left and right flange portions 3, 3 projecting laterally from the upper edges of the left and right side wall portions 2, 2. The left and right flange portions 3 and 3 are coupled to the left and right rear side frames 5 and 5 constituting the rear frame RF. As shown in FIG. 2, the bottom wall portion 1 of the rear floor panel RFP has a central portion 1A that is flat and has a deepest portion, and its front portion 1B is inclined forwardly toward the front of the vehicle V. Further, the rear portion 1C is formed in an inclined surface that rises rearward toward the rear of the vehicle V and inclines in a stepped manner.

  A lower edge flange portion 7 that is inclined downward toward the rear of the lower edge of the rear floor extension RE is integrally coupled to the lower surface of the front edge of the front portion 1B that is inclined forwardly upward of the rear floor panel RFP by welding or the like. The rear floor extension RE rises substantially vertically at the front end of the rear floor panel RP and covers the front surface thereof, and its upper edge flange portion 8 is integrated with the seat cross member 10 extending in the vehicle width direction by welding or the like. Is bound to.

  Further, the rear end of the rear floor panel RFP, which is inclined rearwardly, is integrally joined to the rear panel RP of the vehicle V by welding or the like. The rear panel RP has a rear portion of the rear floor panel RFP that is substantially vertical. Stand up and cover the back. A rear bumper 11 is attached to the rear surface of the rear panel RP via a conventionally known attachment means (not shown).

  As shown in FIG. 2, the rear floor panel RFP, the rear floor extension RE, and the rear panel RP form a box-shaped battery housing recess 13 having an open upper surface. The front corner 1B of the RFP and the lower edge flange portion 7 of the rear floor extension RE form an inclined corner surface 13A that is inclined forward and forward.

  The battery accommodating recess 13 accommodates the battery BT of the hybrid vehicle V close to the front side thereof. The battery BT includes a box-shaped battery case 15 whose upper surface is opened and a flat lid 16 that closes the upper surface of the opening, and a plurality of battery cells 17 are accommodated therein. Further, the lower surface of the battery case 15 is formed in a shape along the shape of the bottom wall portion 1 of the rear floor panel RFP. A pair of front and rear suspension frames 18, 18 extending in the vehicle width direction are sandwiched integrally between the battery case 15 and the lid body 16, and both end portions in the vehicle width direction of these suspension frames 18, 18 are arranged at the rear. It is fixed to the upper surfaces of the left and right rear side frames 5 and 5 constituting the frame RF by bolts 19. Accordingly, the battery BT housed in the battery housing recess 13 close to the front side is suspended and supported by the left and right rear side frames 5 and 5 via the pair of front and rear suspension frames 18 and 18, and is formed with high rigidity. ing.

  As shown in FIG. 2, a rear suspension beam (rear suspension beam) 21 for suspending a rear wheel (not shown) of the vehicle V crosses the front of the battery housing recess 13 at the front lower portion of the battery housing recess 13. The rear upper surface 21A of the rear suspension beam 21 is formed in an inclined surface inclined rearward and downward, and faces the inclined corner surface 13A at the lower front surface of the battery accommodating recess 13 with a gap. ing.

  Thus, the inclination angle of the inclined corner surface 13A at the lower front surface of the battery accommodating recess 13 is designed in advance so as to be substantially the same as the inclined surface 21A of the rear upper surface of the rear suspension beam 21.

  Next, the operation of this embodiment will be described with reference to FIG.

  As shown in FIG. 3 (A), when the vehicle V1 following the vehicle V rear-ends, the subsequent thrust F acts on the upper part of the rear panel RP above the battery BT via the rear bumper 11. The rear panel RP is inclined forward around the coupling point with the rear floor panel RFP, and the upper part of the rear panel RP comes into contact with the upper part of the rear surface of the battery BT. f1 acts. The battery BT is supported by the pair of front and rear suspension frames 18 and 18 and has a relatively high strength. Therefore, the battery BT moves forward due to the stress f1, the front surface thereof contacts the rear floor extension RE, and The inclined corner surface 13 </ b> A reaches the upper rear surface of the rear suspension beam 21. At this time, the seat cross member 10 has high rigidity, and the inclined corner surface 13A of the battery housing recess 13 and the inclined surface 21A of the rear upper portion of the rear suspension beam 21 are formed on an inclined surface that rises forward at substantially the same angle. Therefore, as shown in FIG. 3B, the stress f1 acting on the battery BT is converted into a forward upward stress f2, and the front portion of the battery housing recess 13 is the rear upper surface 21A of the rear suspension beam 21. Ride diagonally forward along. As a result, the battery housing recess 13 is not deformed or damaged even when it collides with the highly rigid rear suspension beam 21, and the battery BT is not damaged.

  Note that, as shown in the reference example of FIG. 4, when the inclined corner surface 13A is not formed in the lower front portion of the battery housing recess 13, the stress f1 is applied to the battery housing recess 13. The battery accommodating recess 13 may move forward and downward, and the front lower portion may be caught in the rear suspension beam 21 and deformed, thereby damaging the battery BT.

  Further, since the lower edge flange portion 7 of the rear floor extension RE is coupled to the lower surface of the front portion 1B of the rear floor panel RFP, the lower edge flange of the rear floor extension RE even if the battery accommodating recess 13 collides with the rear suspension beam 21. The part 7 is not peeled off from the front inclined surface 13A of the battery housing recess 13 and enters the battery housing recess 13, and the lower edge does not damage the battery BT.

  If the flange 7 of the lower edge of the rear floor extension RE is coupled to the upper surface of the front end of the rear floor panel RFP, as shown in the reference example of FIG. 4, the battery housing recess 13 collides with the rear suspension beam 21. At that time, the lower edge flange portion 7 may be peeled off from the front end of the rear floor panel RFP and open, and the lower edge flange portion 7 may enter the battery housing recess 13 to damage the battery BT.

  As mentioned above, although the Example of this invention was described, this invention is not limited to the Example, A various Example is possible within the scope of the present invention.

Rear perspective view of a vehicle body of a hybrid vehicle having a battery support structure of the present invention Sectional view along line 2-2 in FIG. Operational diagram of the present invention Action example of reference example

Explanation of symbols

1B: Front (rear floor panel RFP)
7. Lower flange (rear floor extension RE)
13 .... Battery storage recess 13A ... Inclined corner surface 18 ... Hanging frame 21 ... Rear suspension beam 21A ... Rear upper surface RF ... ... Rear frame RFP ... Rear floor panel RE ... Rear floor extension RP ... Rear panel BT ... Battery

Claims (2)

A rear floor panel (RFP) that is bent in the vehicle width direction and formed into a pit shape in rear view, a rear floor extension (RE) that is connected to the front end of the rear floor panel (RFP) and rises upward, and a rear floor panel (RFP) A battery housing recess (13) is formed by a rear panel (RP) which is coupled to the end and rises upward, and is suspended from the battery housing recess (13) via a suspension frame (18) on the rear frame (RF). A battery support structure in a vehicle, which stores a battery (BT) to be produced,
A front portion (1B) of the rear floor panel (RFP) is formed in a front-upward inclined surface, and a lower edge flange portion (7) of the rear floor extension (RE) is coupled thereto to form a battery housing recess (13). A rear corner beam (21) for suspension of a rear wheel is formed by forming an inclined corner surface (13A) inclined upward in the lower part of the front surface, and this inclined corner surface (13A) is disposed in the lower front part of the battery housing recess (13). A battery support structure in a vehicle, wherein the battery support structure faces a rear upper surface (21A).   The lower edge flange portion (7) of the rear floor extension (RE) is formed as an inclined surface inclined downward and the lower edge flange portion (7) is coupled to the lower surface of the front portion (1B) of the rear floor panel (RFP). The battery support structure for a vehicle according to claim 1, wherein the battery support structure is a vehicle.

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