JP5942577B2 - Vehicle battery pack mounting structure - Google Patents

Description

The present invention relates to a mounting structure for a vehicle battery pack, and more particularly to a mounting structure for a vehicle battery pack mounted on the rear part of a hybrid vehicle or an electric vehicle.

  As a conventional vehicle battery pack, a power supply unit that houses a battery module is mounted on a tire pan on the vehicle rear side of the rear seat (see, for example, Patent Document 1). The power supply unit is provided with an exhaust duct. The exhaust duct is attached to the front side in the vehicle front-rear direction of the power supply unit on the upstream side, and extends downstream in the vehicle width direction at the rear side in the vehicle front-rear direction of the power supply unit through the side of the power supply unit. However, in such a structure, when an external force acts on the rear part of the vehicle from the rear side of the vehicle, for example, the vehicle body parts such as the rear bumper member and the back panel move toward the rear part of the power supply unit, and the vehicle body part and the power supply unit become strong. There is a risk of interference. In such a structure, the exhaust duct has a long overall length and is bent at abrupt angles (right angles) at a plurality of locations along the power supply unit. For this reason, in such a structure, it becomes difficult for the cooling air flowing in the exhaust duct to smoothly flow in the exhaust duct, and there is a possibility that the pressure loss increases and the cooling air cooling performance decreases.

  Other conventional vehicle battery packs are known in which a power supply unit is attached below the rear floor panel on the vehicle rear side of the rear seat (see, for example, Patent Document 2). In this conventional vehicle battery pack, a cooling air discharge port extending toward the rear of the vehicle is provided on the rear surface portion of the power supply unit. The cooling air discharge port is a rectangular tube formed from the main body of the power supply unit toward the rear of the vehicle. In such a cooling air discharge port, when an external force acts on the rear portion of the vehicle from the rear of the vehicle (the vehicle rear side in the axial direction of the rectangular tube), the cylindrical wall (peripheral wall) of the cooling air discharge port is the power supply unit. The external force is transmitted directly to the main body. Therefore, in such a structure, it is difficult to protect the power supply unit when an external force acts on the rear portion of the vehicle from the rear of the vehicle.

JP 2010-120297 A JP 2010-285151 A

Therefore, the present invention has been made in view of the above problems, and provides a mounting structure for a vehicle battery pack that can protect the battery pack when an external force is applied to the rear portion of the vehicle while improving the cooling performance. Objective.

In order to solve the above-described problems and achieve the object, one aspect of the present invention is a cooling system in which a battery pack containing a battery is mounted in a space on the rear side in the vehicle front-rear direction with respect to the rear seat and flows inside the battery pack. In a vehicle battery pack mounting structure provided with an exhaust duct for discharging wind to the outside, an opening is formed in the rear floor panel on the rear side in the vehicle front-rear direction with respect to the rear seat, and the exhaust duct is rearward in the vehicle front-rear direction in the battery pack Provided on the rear side of the vehicle, and provided with an outer wall so as to surround the internal space, the battery pack and the exhaust duct are inserted into the opening, and the rear opening edge of the rear side in the vehicle front-rear direction in the opening. The outer wall that faces the rear opening edge in the vehicle longitudinal direction protrudes rearward in the vehicle longitudinal direction When the rear opening edge of the vehicle receives an external force from the rear of the vehicle and the rear opening edge moves toward the front in the vehicle front-rear direction, the rear opening edge becomes a vehicle on the outer wall. than the end-side outer wall portion located on the widthwise outer ends, pressed forward to the side outer wall after positioned in the front-rear direction rearward vehicle than sandwiched between the end side outer wall the end-side outer wall of the outer wall It is characterized in and to Turkey.

  As said aspect, it is preferable that the rear side opening edge part of the area | region which opposes the rear side outer wall part of an exhaust duct in the vehicle front-back direction is formed in the concave shape curved like the curved shape of a rear side outer wall part. . That is, the rear opening edge of the region facing the rear outer wall portion in the exhaust duct in the vehicle front-rear direction and the rear outer wall portion refer to the vehicle front-rear direction when the rear opening edge moves forward in the vehicle front-rear direction. It is preferable that they are set so as to overlap in the direction.

  In the above aspect, when the rear opening edge moves forward in the vehicle front-rear direction, the rear opening edge of the region facing the rear outer wall in the vehicle front-rear direction contacts the rear outer wall. When this is done, the rear opening edge of the region that does not face the rear outer wall is separated from the rear surface so that a gap is interposed between the rear surface (the rear surface of the battery pack in the vehicle longitudinal direction). It is preferable to form so as to.

  As the above aspect, it is preferable that the end-side outer wall portion in the exhaust duct is set to have a smaller radius of curvature than the rear-side outer wall portion and bend toward the outer side in the vehicle width direction.

  As said aspect, it is preferable that the exhaust duct is set so that the thickness dimension of the end side outer wall part is smaller than the thickness dimension of the rear side outer wall part.

  As said aspect, it is preferable that an exhaust duct is equipped with a discharge port below a rear floor panel.

ADVANTAGE OF THE INVENTION According to this invention, the mounting structure of the vehicle battery pack which can protect a battery pack when external force acts on the rear part of a vehicle can be implement | achieved, improving cooling performance.

FIG. 1 is a side view of a vehicle equipped with a vehicle battery pack mounting structure according to an embodiment of the present invention. FIG. 2 is a plan view of the rear portion of the vehicle on which the mounting structure for the vehicle battery pack according to the embodiment of the present invention is mounted. FIG. 3 is an explanatory view showing the mounting structure of the vehicle battery pack according to the embodiment of the present invention. FIG. 4 is a waist fracture perspective view showing a state in which a battery pack including an exhaust device according to an embodiment of the present invention is mounted on a vehicle. FIG. 5 is a waist side cutaway side view showing a state in which a battery pack including the exhaust device according to the embodiment of the present invention is cut vertically in the vehicle front-rear direction. FIG. 6 is a perspective view of the rear portion of the vehicle on which the mounting structure for the vehicle battery pack according to the embodiment of the present invention is mounted. FIG. 7 is a rear view showing a state in which the exhaust device for the vehicle battery pack according to the embodiment of the present invention is mounted. FIG. 8 is an explanatory diagram illustrating a state in which the exhaust duct is deformed when an external force is applied to the rear portion of the vehicle from the rear of the vehicle. FIG. 9 shows a modified example of the exhaust device for the vehicle battery pack according to the embodiment of the present invention, and is an explanatory diagram showing a state in which the exhaust duct is deformed when an external force is applied to the rear part of the company from the rear of the vehicle It is.

Details of the mounting structure of a vehicle battery pack (hereinafter referred to as a battery pack) according to an embodiment of the present invention will be described below with reference to the drawings. In the present embodiment, for convenience of explanation, the front-rear direction, the left-right direction, and the up-down direction of the vehicle are indicated by arrows in the drawing.

[Schematic configuration of vehicle]
The vehicle battery pack provided with the exhaust device according to the present embodiment is mounted on a vehicle such as a hybrid vehicle or an electric vehicle. As shown in FIG. 1 and FIG. 3, the battery pack 2 is disposed in a space 103 in the rear of the vehicle in the front-rear direction of the rear seat 102 in the vehicle rear portion 101 of the vehicle 100. The rear seat 102 includes a seat cushion 102A and a seat back 102B. Therefore, more specifically, the battery pack 2 is disposed behind the seat cushion 102A in the vehicle front-rear direction.

  As shown in FIG. 2, a pair of rear side members 104 extending along the vehicle front-rear direction are provided on both sides of the vehicle rear portion 101 in the vehicle width direction. A rear floor panel 105 is provided on the rear side members 104. As shown in FIG. 1, a pair of rear wheels 110 are disposed on both sides of the vehicle rear portion 101 in the vehicle width direction. As shown in FIG. 1, a rear bumper member 106 is provided along the vehicle width direction on the rear side of the rear floor panel 105 in the vehicle front-rear direction. A rear panel 107 is provided in front of the rear bumper member 106 in the vehicle front-rear direction. The rear bumper member 106 supports a rear bumper 108 along the vehicle width direction.

  As shown in FIG. 2, the rear floor panel 105 is formed with a substantially rectangular opening 109 into which the upper part of the battery pack 2 is inserted. In particular, in the present embodiment, the rear opening edge (one side) 109A located on the rear side in the vehicle front-rear direction in the opening 109 is formed to be curved in a concave shape toward the rear in the vehicle front-rear direction. Further, the rear opening edge portion 109A is set so that a gap is formed between the rear surface portion 2R of the battery pack 2 disposed in the opening portion 109 and the entire vehicle lateral direction of the rear surface portion 2R. Has been. In particular, in the present embodiment, the rear opening edge 109A has a large radius of curvature and a gentle curve with a small degree of curvature. Therefore, the rear opening edge 109A is set so that it is difficult to locally contact the rear surface portion 2R of the battery pack 2 when an external force is applied to the vehicle rear portion 101 from the rear.

[Battery pack and exhaust system]
The exhaust device 1 is provided integrally with the battery pack 2. As shown in FIG. 3, the battery pack 2 includes a case 21, a plurality of batteries 22 accommodated in the case 21, an air cleaner 23 disposed on the case 21, and a cooling provided in the case 21. A fan 31 and an exhaust duct 32 for guiding cooling air from the cooling fan 31 to the outside of the case 21 are provided.

  As shown in FIGS. 4 to 7, the battery pack 2 is held in a state where the upper portion is inserted into the opening 109 formed in the rear floor panel 105. 3 to 5, the upper portion of the battery pack 2 includes a cylindrical cover panel 111 formed so as to cover the upper portion of the opening 109 of the rear floor panel 105, and an upper opening of the cover panel 111. It is covered with a lid 112 attached to the part. For this reason, the cover panel 111 and the lid 112 define a space on the luggage compartment side and a space 103 in which the battery pack 2 is disposed. The space 103 can be introduced with air from inside or outside the vehicle.

  The case 21 is a casing having a substantially rectangular parallelepiped rigidity formed of a material having electrical insulation. The planar outline of the case upper portion 21 </ b> A that is the upper portion of the case 21 is formed to have a size that can be accommodated in the opening 109. In addition, the part of the case 21 below the case upper part 21A has a larger planar contour than the case upper part 21A. That is, in case 21, case upper part 21A is formed small, and case lower part 21B part below case upper part 21A is formed large.

  A module in which a plurality of batteries 22 that generate a high voltage are combined is housed in the case 21 so as to form a plurality of stages. In general, the rear floor panel 105 is provided at a higher position than the floor of the passenger compartment. Therefore, in the present embodiment, case lower portion 21 </ b> B in battery pack 2 is arranged using a large space below rear floor panel 105. Therefore, in the present embodiment, battery pack 2 having a large capacity and a large size as a whole can be efficiently mounted in the space above and below rear floor panel 105.

  As shown in FIG. 3, the air cleaner 23 is placed on the case upper portion 21A. The air cleaner 23 contains an air filter (not shown) inside. In the present embodiment, the air cleaner 23 takes in air from the space 103 in which the battery pack 2 is mounted. The case 21 includes an air guide path 24 that guides the cooling air introduced from the air cleaner 23 to the battery 22 and an air guide path 25 that guides air from the battery 22 to the cooling fan 31. The air guide paths 24 and 25 include a gap between the module made of the battery 22 and the inner wall of the case 21, a gap between the modules, a gap between the batteries 22, and the like.

  As shown in FIG. 3, the exhaust device 1 according to the present embodiment includes a cooling fan 31 and an exhaust duct 32. The cooling fan 31 is disposed in the case 21 of the battery pack 2 and generates cooling air that passes through the case 21 and cools the battery 22. The cooling fan 31 is set to exhaust cooling air to the outside of the case 21 through an air guide path 26 directed to the exhaust opening 27 formed on the rear surface 2R side of the case upper portion 21A. The air guide path 26 may not be a duct-like structure, and may be a blower space through which cooling air is sent. The exhaust duct 32 is provided on the rear surface portion 2 </ b> R of the case 21 so as to communicate with the exhaust opening 27. The rear surface portion 2R is formed in a flat plate shape.

  As shown in FIG. 7, the exhaust duct 32 is formed so as to extend in a cylindrical shape from one (right) side to the other (left) side in the vehicle width direction along the rear surface portion 2R of the battery pack 2. At the downstream end portion (left side portion in the vehicle width direction) of the exhaust duct 32, a discharge port 34 is formed which opens below the rear floor panel 105 toward the rear in the vehicle front-rear direction. As shown in FIG. 3, the discharge port 34 discharges the cooling air f <b> 6 toward the rear below the rear floor panel 105.

  FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIG. 7 and shows a horizontal cross section of the battery pack 2 and the exhaust duct 32 at the height of the rear floor panel 105. As shown in FIG. 8, the exhaust duct 32 includes a substantially cylindrical outer wall portion 33 that surrounds the internal space S. In addition, when the battery pack 2 and the exhaust duct 32 are viewed from above, the contour (planar contour) of the outer surface of the exhaust duct 32 is a curve that swells rearward in the vehicle front-rear direction.

  In addition, in the present embodiment, as shown in FIG. 8, the outer wall portion 33 of the exhaust duct 32 has a shape with a curved corner portion. For this reason, the inner surface of the outer wall part 33 is comprised by the curved surface. FIG. 8 shows a horizontal cross section of the exhaust duct 32 at the height of the rear floor panel 105, but the outer wall 33 is substantially entirely curved. For this reason, the internal space S in the exhaust duct 32 is surrounded by a continuous curved surface that is the inner surface of the outer wall portion 33.

  As shown in FIG. 8, the cylindrical portion of the exhaust duct 32 in the horizontal cross section has an outer outer wall portion 33 </ b> A in a region facing the rear opening edge 109 </ b> A of the opening 109 in the vehicle front-rear direction, The outer side wall part 33B of the edge part side of both ends, and the flat front side outer wall part 33C joined to the rear surface part 2R of the battery pack 2 are provided. The end portion side outer wall portion 33B is divided by a one-dot chain line L1, L2 into a rear side outer wall portion 33A and a front side outer wall portion 33C. Of the outer wall portion 33 of the exhaust duct 32, the outer outer wall portion 33 </ b> A and the curved end-side outer wall portions 33 </ b> B formed on both sides thereof have a shape that protrudes (bends) as a whole toward the rear in the vehicle front-rear direction. Is formed. The rear outer wall 33 </ b> A facing the rear opening edge 109 </ b> A in the exhaust duct 32 is formed in a convex shape corresponding to the concave shape of the rear opening edge 109 </ b> A of the rear floor panel 105.

  In the present embodiment, the radius of curvature of the end-side outer wall portion 33B is set smaller than the radius of curvature of the rear-side outer wall portion 33A. In addition, the thickness dimension t1 of the bending center of the end-side outer wall portion 33B (the portion that curves and protrudes most outward in the vehicle width direction) is set to be smaller than the thickness dimension t2 of the outer outer wall portion 33A. Note that the portion having the thickness dimension t1 at the center of curvature of the end-side outer wall portion 33B is not only the portion facing the opening 109 (the portion having the same height as the rear floor panel 105), but also the end-side outer wall portion 33B. It is preferable that it is formed so as to be continuous along the vehicle vertical direction.

  Further, as shown in FIG. 8, in the present embodiment, the rear opening edge 109 </ b> A of the opening 109 and the region facing the outer outer wall 33 </ b> A of the exhaust duct 32 in the vehicle front-rear direction is an outer side. It is formed so as to be substantially parallel to the outer wall portion 33A. Therefore, the distance D1 in the vehicle front-rear direction between the outer outer wall portion 33A of the exhaust duct 32 and the rear opening edge portion 109A is set to be substantially equidistant across the vehicle width direction. As shown in FIGS. 2, 5, and 8, in the present embodiment, when an external force F acts on the rear portion 101 of the vehicle from the rear, the rear opening edge portion 109 </ b> A of the opening portion 109 on the rear side in the vehicle front-rear direction is provided. The outer wall portion 33 of the exhaust duct 32 is pressed without contacting the rear surface portion 2R.

[Action and effect]
The configuration of the vehicle battery pack mounting structure according to the present embodiment has been described above, but the operation and effect of the following exhaust device 1 will be described.

  As shown in FIG. 5, in the exhaust device 1 according to the present embodiment, when an external force F acts on the rear portion 101 of the vehicle from the rear of the vehicle by the exhaust duct 32, body parts (for example, the rear bumper member 106, the rear panel 107, It is possible to prevent the rear bumper 108 and the like from directly interfering with the battery pack 2. That is, when an external force F is applied to the rear portion 101 of the vehicle from the rear of the vehicle, vehicle body parts (for example, the rear bumper member 106, the rear panel 107, the rear bumper 108, etc.) push the rear floor panel 105 forward in the vehicle front-rear direction to the rear floor panel 105. The formed rear opening edge 109 </ b> A can be brought into contact with the rear outer wall 33 </ b> A of the exhaust duct 32.

  In the exhaust device 1 according to the present embodiment, the rear outer wall portion 33A of the exhaust duct 32 is curved so as to protrude rearward in the vehicle front-rear direction. For this reason, when the external force F acts on the vehicle rear portion 101 from the rear of the vehicle, the exhaust duct 32 is pushed by the rear floor panel 105 and can easily be deformed or crushed from the curved portion. Thereby, the impact transmitted from the vehicle body parts toward the battery pack 2 can be reduced, and the battery pack 2 can be protected.

  In the exhaust device 1 according to the present embodiment, when the exhaust duct 32 is viewed from above, the rear outer wall portion 33A of the exhaust duct 32 is curved so as to be convex toward the rear side in the vehicle front-rear direction. The cooling air discharged from the battery pack 2 can be guided along the curved curved surface of the exhaust duct 32. Therefore, the exhaust duct 32 of the present embodiment has an effect that the pressure loss of the cooling air can be reduced. Thereby, in the exhaust device 1, the flow of the cooling air in the exhaust duct 32 can be made smooth, and the cooling performance in the battery pack 2 can be improved.

  In the exhaust device 1 according to the present embodiment, the rear opening edge 109A of the region facing the rear outer wall 33A in the exhaust duct 32 in the vehicle front-rear direction and the rear outer wall 33A are the rear opening. When the edge portion 109A moves forward in the vehicle front-rear direction, the edge portion 109A is set to overlap in the vehicle front-rear direction. Therefore, in the exhaust device 1 according to the present embodiment, when an external force F acts on the vehicle rear portion 101 from the rear of the vehicle, the rear opening edge 109A of the rear floor panel 105 and the rear outer wall portion 33A of the exhaust duct 32 are provided. The contact area (contact area) can be increased.

  Therefore, in the exhaust device 1 according to the present embodiment, the rear opening edge 109A of the rear floor panel 105 evenly presses the rear outer wall 33A of the exhaust duct 32 forward in the front-rear direction of the vehicle, and the exhaust duct 32 It is possible to avoid stress concentration on a part of the surface. As a result, in the exhaust device 1 according to the present embodiment, local deformation of the rear outer wall portion 33A can be prevented. In the exhaust device 1 according to the present embodiment, the force with which the rear opening edge 109A of the rear floor panel 105 presses the exhaust duct 32 is applied over the entire region in the vehicle width direction of the rear outer wall portion 33A of the exhaust duct 32. Can be dispersed. Therefore, in the exhaust device 1 according to the present embodiment, the exhaust duct 32 can be flattened in the vehicle front-rear direction, and the impact can be reliably absorbed by the exhaust duct 32.

  In the exhaust device 1 according to the present embodiment, the end-side outer wall portion 33B of the exhaust duct 32 is set to have a smaller radius of curvature than the rear-side outer wall portion 33A and bend outward in the vehicle width direction. Yes. For this reason, it is possible to easily deform the end portion side outer wall portion 33B toward the outer side in the vehicle width direction, starting from the curved center of the curved end portion side outer wall portion 33B. Therefore, in the exhaust device 1 according to the present embodiment, when the rear opening edge 109A of the rear floor panel 105 contacts the rear outer wall 33A of the exhaust duct 32, the exhaust duct 32 is reliably deformed into a flat shape. Or can be crushed. As a result, in the exhaust device 1 according to the present embodiment, the impact transmitted to the battery pack 2 due to the deformation of the exhaust duct 32 can be absorbed and the battery pack 2 can be protected.

  In the exhaust device 1 according to the present embodiment, the thickness dimension t1 of the end side outer wall part 33B is set smaller than the thickness dimension t2 of the rear side outer wall part. For this reason, these edge part side outer wall parts 33B can be easily changed toward the vehicle width direction outer side. Therefore, in the exhaust device 1 according to the present embodiment, when the rear opening edge 109A of the rear floor panel 105 contacts the rear outer wall 33A of the exhaust duct 32, the exhaust duct 32 is reliably deformed into a flat shape. Or can be crushed. As a result, in the exhaust device 1 according to the present embodiment, the impact transmitted to the battery pack 2 due to the deformation of the exhaust duct 32 can be absorbed and the battery pack 2 can be protected. The end side outer wall portion 33B can be reliably deformed.

  In the exhaust device 1 according to the present embodiment, since the discharge port 34 is provided below the rear floor panel 105, the cooling air heated by absorbing heat in the battery pack 2 is not discharged into the luggage compartment. It can be discharged outside the vehicle. For this reason, in the exhaust device 1 according to the present embodiment, the cooling performance can be improved.

  In the exhaust device 1 according to the present embodiment, since the exhaust duct 32 is disposed only on the rear surface portion 2R of the battery pack 2, the routing distance of the exhaust duct 32 is short, the configuration can be simplified, and the pressure loss is reduced. Cooling performance can be improved.

[Modification]
FIG. 9 shows a modification of the exhaust device 1 according to the present embodiment. FIG. 9 is a cross-sectional view showing a state in which the same position as in FIG. 8 is cut. In this modification, when an external force F acts on the rear portion 101 of the vehicle from the rear and the rear opening edge 109A of the rear floor panel 105 moves forward in the vehicle front-rear direction, the rear side of the rear opening edge 109A The portion of the region that does not face the outer wall portion 33A in the vehicle front-rear direction is set to a shape that does not easily collide with the rear surface portion 2R of the battery pack 2. That is, it is formed to be separated from the rear surface portion 2R so that a gap is interposed between the rear opening edge portion 109A and the rear surface portion 2R. Specifically, as shown in FIG. 9, in the rear opening edge 109 </ b> A, the region that does not directly face the exhaust duct 32 in the vehicle front-rear direction has a distance D <b> 2 in the vehicle front-rear direction with respect to the rear surface portion 2 </ b> R of the battery pack 2. It is set longer than the distance D1 between the outer outer wall portion 33A and the rear opening edge portion 109A in the vehicle front-rear direction.

  In this modified example, a portion of the rear opening edge 109A that does not face the exhaust duct 32 in the vehicle front-rear direction has a long distance D2 with respect to the rear surface portion 2R of the battery pack 2. In this modification, when the vehicle rear portion 101 receives an external force F from the rear of the vehicle and the rear side opening edge portion 109A moves toward the front side in the vehicle front-rear direction, the rear side opening edge portion 109A becomes the end side outer wall. It is possible to reliably prevent the rear opening edge 109A from directly contacting the part 33B or the rear outer wall part 33A and directly contacting the rear surface part 2R. Therefore, the exhaust duct 32 can further prevent the rear opening edge portion 109A from directly contacting the rear surface portion 2R of the exhaust duct 32, so that the effect of protecting the battery pack 2 is high.

(Other embodiments)
Although the embodiment has been described above, it should not be understood that the description and the drawings constituting a part of the disclosure of the embodiment limit the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  For example, in the above embodiment, the rear opening edge 109A of the opening 109 of the rear floor panel 105 and the rear outer wall 33A of the exhaust duct 32 are arranged separately in advance and are not in contact with each other. However, the rear opening edge 109A may be in contact with the rear outer wall 33A from the beginning.

  In the above embodiment, the opening end face of the rear opening edge 109A may be formed in a wide strip shape that is long in the vertical direction, and the contact area with the rear outer wall 33A of the exhaust duct 32 may be increased. .

  Further, in the above embodiment, the exhaust opening 27 is disposed on the upper right side in the rear surface portion 2R of the battery pack 2, and the exhaust port 34 is disposed on the lower left side in the exhaust duct 32. It is not limited.

DESCRIPTION OF SYMBOLS 1 Exhaust device 2 Battery pack 2R Rear surface part 21 Case 21A Case upper part 21B Case lower part 22 Battery 27 Exhaust opening part 31 Cooling fan 32 Exhaust duct 33 Outer wall part 33A Rear side outer wall part 33B End side outer wall part 33C Front outer wall part 34 Exhaust Exit 100 Vehicle 101 Vehicle rear portion 102 Rear seat 102A Seat cushion 103 Space 104 Rear side member 105 Rear floor panel 106 Rear bumper member 107 Rear panel 108 Rear bumper 109 Opening portion 109A Rear opening edge portion S Internal space

Claims (6)

In a vehicle battery pack mounting structure in which a battery pack containing a battery is mounted in a space on the rear side in the vehicle front-rear direction with respect to a rear seat, and provided with an exhaust duct for discharging cooling air flowing inside the battery pack to the outside ,
An opening is formed in the rear floor panel on the rear side in the vehicle longitudinal direction from the rear seat,
The exhaust duct is provided on a rear surface portion of the battery pack in the vehicle front-rear direction rear side, and includes an outer wall portion so as to surround an internal space.
The battery pack and the exhaust duct are inserted into the opening, and the exhaust duct is disposed so as to face the rear opening edge of the opening in the vehicle front-rear direction.
The outer wall portion facing the rear opening edge in the vehicle front-rear direction is curved so as to protrude rearward in the vehicle front-rear direction,
When the rear opening edge of the vehicle receives an external force from the rear of the vehicle and the rear opening edge moves forward in the vehicle front-rear direction, the rear opening edge is positioned at both ends of the outer wall portion on the outer side in the vehicle width direction. than the end-side outer wall of the pressure contact to Turkey earlier in the side outer wall after positioned in the front-rear direction rearward vehicle than the end portions sandwiched by outer wall the end-side outer wall of the outer wall A vehicle battery pack mounting structure as a feature. Before SL rear opening edge of the region facing the vehicle longitudinal direction to the rear side wall portion of the exhaust duct, characterized in that it is formed in a concave shape that is curved similarly to the curved shape of the rear outer wall section The vehicle battery pack mounting structure according to claim 1. When the rear opening edge moves forward in the vehicle front-rear direction, the rear opening edge in a region facing the rear outer wall in the vehicle front-rear direction comes into contact with the outer wall. The rear opening edge portion in a region not facing the side outer wall portion is formed so as to be separated from the rear surface portion so that a gap is interposed between the rear surface edge portion and the rear surface portion. The vehicle battery pack mounting structure according to claim 2. 2. The exhaust duct according to claim 1, wherein the end-side outer wall portion has a radius of curvature smaller than that of the rear-side outer wall portion and is curved toward the outer side in the vehicle width direction. The vehicle battery pack mounting structure according to claim 3. 5. The exhaust duct according to claim 1, wherein a thickness dimension of the end-side outer wall portion is set to be smaller than a thickness dimension of the rear-side outer wall portion. The vehicle battery pack mounting structure described in 1. The vehicle battery pack mounting structure according to any one of claims 1 to 5, wherein the exhaust duct includes a discharge port below the rear floor panel.

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