JP2014084044A - Power device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power device for a vehicle that can exhibit surely cooling capability of a battery pack, improve comfort to a crewmember and secure strength of a rear floor panel.SOLUTION: A recessed groove 105A extending in a longitudinal direction of a vehicle is formed at a central portion in a vehicle width direction on a lower face of a cushion portion 105. A support member 4 extending in the vehicle width direction is arranged below the cushion portion 105 on the upper face of a rear floor panel 103. In a region crossing the recessed groove 105A in the support member 4 is formed a space 41 for insertion of a duct into which an air intake duct 3 is inserted. The air intake duct 3 is passed from a battery pack 2 through the recessed groove 105A to be extended forward in the vehicle longitudinal direction. The front portion of the air intake duct 3 is arranged in the space 41 for insertion of the duct and the air intake duct 3 is set to have strength capable of supporting the weight of the crewmember.

Description

  The present invention relates to a vehicle power supply device mounted on an electric vehicle, a hybrid vehicle, a plug-in hybrid vehicle, and the like, and more particularly relates to a power supply device that is disposed on a rear floor panel and has a cooling function.

  In recent years, automobiles such as electric vehicles, hybrid vehicles, and plug-in hybrid vehicles equipped with a vehicle power supply device including a battery pack have been put into practical use. The battery pack generates heat from an internal battery (battery cell) when charging and discharging are performed. For this reason, in the battery pack, in order to prevent the performance deterioration of the battery, a cooling unit that appropriately excludes the heat generated from the battery is necessary. As a conventional battery pack cooling means, an air intake duct extending from the battery pack arranged on the rear floor panel behind the rear seat to one side in the vehicle width direction is arranged in the side wall of the vehicle body located beside the backrest portion of the rear seat. A cooling structure is known (see, for example, Patent Document 1). In this battery pack cooling structure, the intake port of the intake duct is arranged on the upper side garnish next to the backrest portion of the rear seat. The intake duct takes air in the passenger compartment from an intake port and supplies the air as cooling air to a battery by a blower fan or the like.

  As another conventional battery pack cooling structure, an air intake duct made of a plastic hollow molding or a foam member extending forward of the vehicle from the battery pack disposed on the rear floor panel behind the rear seat is disposed below the rear seat. Those are known (for example, see Patent Document 2). The intake port of the intake duct is disposed below the rear seat. In this cooling structure, since the intake port of the intake duct is disposed below the rear seat, air having a relatively low temperature in the passenger compartment can be taken into the intake duct.

JP 2004-1683 A German Patent No. 102008047546

  In the cooling structure in which the intake port of the intake duct described above is disposed on the upper side garnish next to the backrest portion of the rear seat, the intake port is disposed at a relatively high position in the vehicle interior. High air will be taken in. Therefore, in the vehicle power supply device having such a cooling structure, it is difficult to eliminate heat generated in the battery. In addition, in such a cooling structure, the air intake vent is arranged at a height close to the occupant's ear seated on the rear seat, so that the wind noise of the air taken from the air intake vent can easily enter the ear and make the passenger uncomfortable. May impair comfort.

  Further, in the cooling structure in which the intake port of the intake duct is disposed below the rear seat as described above, the intake duct is formed of a plastic hollow molding or a foamed member. Therefore, when the occupant sits on the cushion portion of the rear seat, There is a possibility that the intake duct may be crushed by the weight of the. In addition, when a child seat is mounted on the rear seat, when the vehicle stops suddenly or when an external force is applied to the vehicle from the front, the amount of subsidence that the front end of the child seat sinks to the rear seat increases and the passage cross-sectional area of the intake duct increases. May not be sufficiently secured. Similarly, with the child seat mounted on the rear seat, when the vehicle suddenly turns right (or turns left), the child seat sinks to the center of the rear seat in the vehicle width direction, and the child seat sinks to the rear seat. There is a possibility that the amount of entrainment increases and a sufficient cross-sectional area of the intake duct cannot be secured. Therefore, in the cooling structure in which the intake port of the intake duct described above is disposed below the rear seat, the child seat sinks, so that it is difficult for sufficient air to flow to the battery pack through the intake duct. May decrease. As described above, in the state where the child seat is mounted on the rear seat, the movement amount or amplitude amount of the child seat increases, which may cause discomfort to the passenger (infant or child) riding on the child seat.

  The present invention has been made in view of the above problems, and provides a vehicle power supply device that can reliably exhibit the cooling performance of a battery pack, improve passenger comfort, and ensure the strength of a rear floor panel. The purpose is to provide.

  In order to solve the above-described problems and achieve the object, according to an aspect of the present invention, a rear seat is provided on an upper surface of a rear floor panel provided to extend rearward of the front floor panel through a stepped portion rising from the front floor panel. A battery pack containing a battery is disposed behind the rear seat on the upper surface of the rear floor panel, and an air intake duct extending from the battery pack to the front in the vehicle front-rear direction for taking air in the vehicle compartment into the battery pack is a cushion for the rear seat In the cooling device for a vehicle battery pack disposed between the rear portion and the rear floor panel, a concave groove extending in the vehicle front-rear direction is formed in the center portion of the lower surface of the cushion portion in the vehicle width direction. Support men extending in the vehicle width direction below the cushion A space for inserting the intake duct is formed in a region of the support member that intersects the recessed groove, and the intake duct extends from the battery pack through the recessed groove forward in the vehicle front-rear direction to the front of the intake duct. The portion is arranged in the duct insertion space, and the intake duct has a strength capable of supporting the weight of an occupant.

  As said aspect, it is preferable that the support member is arrange | positioned under the front-end part of a cushion part.

  As the above aspect, the air intake duct has a flat shape with a long cross section along the vehicle width direction. When the child seat is mounted on the cushion portion close to the vehicle width direction end of the rear seat, It is preferable that at least a part of the lower portion of the rear seat positioned on the center side in the vehicle width direction is set to be positioned above the intake duct.

  As an aspect described above, the intake duct includes a plurality of partition plates, and the plurality of partition plates are respectively provided between the upper wall portion and the lower wall portion of the intake duct and along the flow path of the intake duct. It is preferably provided so as to extend in the vehicle front-rear direction and divide the internal space of the flow path into a plurality of sections.

  As the above aspect, it is preferable that the front end portion of the intake duct is disposed in the duct insertion space of the support member, and a bracket that covers the upper portion of the front end portion of the intake duct is attached to the support member.

  ADVANTAGE OF THE INVENTION According to this invention, the power supply device for vehicles which can exhibit the cooling performance of a battery pack reliably, can improve a passenger | crew's comfort, and can ensure the intensity | strength of a rear floor panel is realizable.

FIG. 1 is a perspective view of an essential part of a vehicle equipped with a vehicle power supply device according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a main part when a vehicle equipped with the vehicle power supply device according to the embodiment of the present invention is viewed from the side. FIG. 3 is a plan view of an essential part of the vehicle on which the vehicle power supply device according to the embodiment of the present invention is mounted. FIG. 4 is an exploded perspective view showing the intake duct of the vehicle power supply device according to the embodiment of the present invention. FIG. 5 is a front view showing a support member of the vehicle power supply device according to the embodiment of the present invention. FIG. 6 is a main part perspective view showing a state in which the rear seat and the battery pack are removed from the vehicle on which the vehicle power supply device according to the embodiment of the present invention is mounted. FIG. 7 is a front view of a vehicle equipped with the vehicle power supply device according to the embodiment of the present invention as seen from the front side of the rear seat. FIG. 8 is a front view of the vehicle as viewed from the front side of the rear seat, showing a state in which the child seat is depressed with respect to the rear seat when the vehicle equipped with the vehicle power supply device according to the embodiment of the present invention turns right. is there. FIG. 9 is a cross-sectional view of the main part viewed from the side of the vehicle, showing a state in which the child seat sinks with respect to the rear seat when the vehicle equipped with the vehicle power supply device according to the embodiment of the present invention receives external force from the front. It is. FIG. 10 shows a comparative example, and is a cross-sectional view of the main part viewed from the side of the vehicle, showing a state in which the child seat is depressed with respect to the rear seat when an external force is applied to the vehicle on which the vehicle power supply device is mounted. FIG. 11A is a front view showing a first modification of the support member in the vehicle power supply device according to the embodiment of the present invention. FIGS. 11-2 is a front view which shows the modification 2 of the support member in the power supply device for vehicles in embodiment of this invention. FIGS.

  Hereinafter, details of a power supply device for a vehicle (hereinafter referred to as a power supply device) according to an embodiment of the present invention will be described with reference to the drawings. In this embodiment, for convenience of explanation, the front-rear direction, the left-right direction, and the up-down direction of the vehicle on which the power supply device is mounted are indicated by arrows in the figure, and the front-rear direction, left-right direction, and It demonstrates as a vertical direction.

[Schematic configuration of installed vehicle]
First, prior to the description of the configuration of the power supply device according to the present embodiment, a schematic configuration of a vehicle on which the power supply device is mounted will be described. This power supply device is mounted on a vehicle such as an electric vehicle, a hybrid vehicle, or a plug-in hybrid vehicle, for example. As shown in FIG. 1 and FIG. 2, a vehicle 100 on which the power supply device 1 of the present embodiment is mounted is provided so as to rise from a front floor panel 101 and a rear end portion of the front floor panel 101 in the vehicle front-rear direction. And a rear floor panel 103 provided so as to extend rearward in the vehicle front-rear direction from the upper edge of the step 102. A rear seat 104 is provided on the front upper surface of the rear floor panel 103 in the vehicle width direction. The rear seat 104 includes a cushion portion 105 and a seat back portion 106. The dimensions of the cushion portion 105 and the seat back portion 106 in the vehicle width direction approximate the dimensions of the rear floor panel 103 in the vehicle width direction.

  The cushion part 105 is obtained by, for example, covering a flat, substantially rectangular parallelepiped inner member made of a general-purpose flexible polyurethane foam with a cover member. In general, general-purpose polyurethane foam is a lightweight cushioning material having a relatively low foam density. General-purpose polyurethane foam is lightweight but has low impact resilience. For this reason, generally, as the cushion part 105, the general-purpose polyurethane foam is used with a relatively large thickness. Further, the inner member of the seat back portion 106 is a member having a cushioning property like the cushion portion 105.

  As shown in FIGS. 1 and 3, a concave groove 105 </ b> A extending in the vehicle front-rear direction is formed at the center of the lower surface of the cushion portion 105 in the vehicle width direction. The intake duct 3 is accommodated in the concave groove 105A. The depth dimension of the concave groove 105A is set to be approximately the height dimension of the intake duct 3 to be accommodated. The width dimension (length in the vehicle width direction) of the concave groove 105 </ b> A is set to be longer than the width dimension of the intake duct 3.

[Power supply]
Next, the configuration of the power supply device 1 according to the present embodiment will be described. As shown in FIGS. 1 to 3, the power supply device 1 includes a battery pack 2, an intake duct 3, a support member 4, and a cooling fan 5. The battery pack 2 is disposed behind the rear seat 104 in the vehicle front-rear direction. That is, the battery pack 2 is disposed on the rear floor panel 103 behind the cushion portion 105 in the vehicle front-rear direction. More specifically, as shown in FIG. 2, in the present embodiment, battery pack 2 is arranged in a recess 103 </ b> A formed in rear floor panel 103.

  As shown in FIG. 3, the battery pack 2 includes a substantially rectangular parallelepiped case 21 and a battery 23 including a plurality of battery modules 22 housed in the case 21. The intake duct 3 is connected to the center of the front end portion of the battery pack 2 so as to extend forward from the battery pack 2 in the vehicle front-rear direction. The intake duct 3 extends through the concave groove 105 </ b> A of the cushion portion 105 to above the central portion of the stepped portion 102 in the vehicle width direction. As shown in FIGS. 1 to 3, the intake duct 3 introduces cooling air S <b> 1 from a relatively low position in the passenger compartment. The cooling fan 5 is connected to the center of the rear end portion of the battery pack 2. The cooling fan 5 is configured to discharge the cooling air S <b> 2 in the case 21 carried through the intake duct 3 from the discharge port 51. The cooling air S3 discharged from the discharge port 51 is discharged outside the passenger compartment.

  In the present embodiment, as shown in FIG. 4, the intake duct 3 has three intake ports 31 at the front end in the vehicle front-rear direction. Three passages 32 are formed so as to be parallel to each other up to a predetermined length (approximately the length of the cushion portion 105 in the vehicle front-rear direction) from the suction port 31 toward the battery pack 2 side. These three passages 32 merge as one passage 33 at the end on the battery pack 2 side. That is, in the intake duct 3, a portion located below the cushion portion 105 is configured by a passage 32 as three ducts. Further, the portion of the intake duct 3 that is located behind the cushion portion 105 in the vehicle front-rear direction is constituted by a passage 33 as one duct into which the three passages 32 merge. The passages 32 as three ducts each include an upper wall portion 34 and a lower wall portion 35 that are positioned vertically along the vehicle longitudinal direction and extend in parallel. A pair of partition plates 36 and 36 are formed on both side edges in the vehicle front width direction of the upper wall portion 34 as side wall portions that hang downward. The lower edge portions of the pair of partition plates 36 and 36 are in contact with both side portions of the lower wall portion 35 in the vehicle width direction. Therefore, since the three passages 32 include the six partition plates 36, the durability against a load pushed from above is set to be large. In particular, in the present embodiment, the upper wall portion 34, the lower wall portion 35, and the left and right partition plates 36 of the intake duct 3 are formed of steel plates having strength that can support at least the weight of the occupant.

  As described above, in the present embodiment, the intake duct 3 sets the cross section of the flow path to a long flat shape along the vehicle width direction. As shown in FIG. 3, in the present embodiment, when the child seat 6 is mounted on the cushion portion 105 by moving toward the vehicle width direction end portion side (right side in FIG. 3) with respect to the rear seat 104, The child seat 6 is set so that at least a part of a lower portion (lower edge) 64 located on the center side in the vehicle width direction of the rear seat 104 is located above the intake duct 3.

  The support member 4 is provided on the upper surface of the front end portion of the rear floor panel 103 so as to extend over the entire width of the rear floor panel 103 along the vehicle width direction. The support member 4 is positioned below the front end portion of the cushion portion 105. As shown in FIG. 5, the support member 4 is formed with a duct insertion space 41 for inserting (accommodating) the tip of the intake duct 3 in a region intersecting with the concave groove 105 </ b> A formed on the lower surface of the cushion portion 105. Has been. The space 41 for inserting the duct has a shape in which a central upper portion in the longitudinal direction of the support member 4 is cut out in a concave shape so that the intake duct 3 can be inserted. Therefore, the intake duct 3 extends forward from the battery pack 2 through the concave groove 105 </ b> A in the vehicle front-rear direction, and the front end portion of the intake duct 3 is disposed in the duct insertion space 41. As shown in FIGS. 1 and 3, the suction port 31 provided at the front end portion of the intake duct 3 is in a state of opening on the front side of the duct insertion space 41 of the support member 4. Further, as shown in FIG. 6, a bracket 42 is provided above the duct insertion space 41 of the support member 4 so as to cover the upper portion of the intake duct 3 in a state where the intake duct 3 is housed in the duct insertion space 41. Has been placed. The bracket 42 is constructed between the upper surfaces of the support member 4 sandwiching the duct insertion space 41, and is provided to protect the intake duct 3 and improve the strength of the support member 4.

[Operation and effect of power supply unit]
With such a configuration, in the power supply device 1 according to the present embodiment, since the support member 104 has the duct insertion space 41, the support member 104 is substantially below the cushion portion 105 and forward from the battery pack 2 in the front-rear direction of the vehicle. The intake duct extending in a straight line can be arranged without receiving the interference of the support member 4. Therefore, in the power supply device 1 according to the present embodiment, the rear floor panel 103 on the lower side of the cushion portion 105 can be reinforced by the support member 4. Further, in the present embodiment, it is not necessary to greatly curve the intake duct 3 so as to avoid the support member 4. For this reason, in this power supply device 1, deformation of the rear floor panel 103 can be prevented. For this reason, in this Embodiment, the full length of the intake duct 3 can be shortened, and the intake port 31 opened to the front-end part of the intake duct 3 can be arrange | positioned in the lower part of a vehicle interior. Moreover, in this Embodiment, since the inlet 31 is arrange | positioned in the center part of the vehicle width direction of the cushion part 105, it can make it difficult for an inhalation sound to reach a passenger | crew's ear. As a result, the airflow resistance of the cooling air S2 flowing through the intake duct 3 can be reduced to improve the cooling performance of the battery pack 2, and the intake port 31 can be opened at a position where the temperature rise of air due to solar radiation is small.

  Further, in the power supply device 1 of the present embodiment, the front end portion of the intake duct 3 is installed in a duct insertion space 41 provided in the support member 4. Therefore, in this power supply device 1, it is not necessary to bend the intake duct 3 above the support member 4 in order to open the intake port 31 of the intake duct 3 at the center of the cushion portion 105 in the vehicle width direction. Accordingly, as shown in FIG. 7, from the upper wall surface of the intake duct 3 to the surface (upper surface) of the cushion portion 105 in an environment where the occupant 8 can sit on the rear seat 104 while maintaining an appropriate height position. It is possible to prevent the thickness dimension of the cushion portion 105 from becoming extremely small. For this reason, the thickness dimension of the cushion part 105 can be ensured moderately, and cushion performance can be maintained. As a result, the occupant 8 can sit comfortably on the rear seat 104 at a moderate height and with sufficient cushioning performance.

  In the present embodiment, the intake duct 3 and the support member 4 are arranged below the cushion portion 105. Therefore, as shown in FIG. 9, when the vehicle 100 with the child seat 6 mounted on the rear seat 104 stops suddenly or receives an external force from the front of the vehicle, the inertia force Fi1 that tries to move to the front of the vehicle acts on the child seat 6. However, the movement amount of the child seat 6 can be suppressed by the intake duct 3 and the support member 4, and the child seat 6 can be prevented from sinking greatly toward the cushion portion 105.

  In general, when an occupant rides on the cushion portion 105, the surface of the cushion portion 105 is relatively easy to sink at the center portion side of the cushion portion 105 in the vehicle width direction compared to the end portion in the vehicle width direction. Therefore, when the child seat 6 is mounted on the right side (or left side) of the cushion portion 105 and the vehicle suddenly makes a right turn (or left turn), the child seat 6 is centered in the vehicle width direction of the cushion portion 105 by centrifugal force. Tend to be pulled to the side. Then, as shown in FIG. 8, the side portion 64 of the child seat 6 near the center in the vehicle width direction of the vehicle seat in the rear seat 104 sinks into the cushion portion 105 due to the centrifugal force Fi2 generated by turning of the vehicle. Therefore, in the present embodiment, a concave groove 105A extending in the vehicle front-rear direction is formed in the center of the lower surface of the cushion portion 105 in the vehicle width direction, and the intake duct 3 that is not easily deformed is provided in the concave groove 105A. The intake duct 3 can suppress an increase in the amount of sinking into the cushion portion 105. Therefore, in the present embodiment, the vibration and vibration of the child seat 6 can be reduced, and the comfort of an occupant (see FIG. 2) 7 such as an infant or a child riding on the child seat 6 can be improved.

  The movement amount of the upper part 63 of the child seat 6 in the rear seat 104 on which the power supply device 1 according to the present embodiment is mounted is defined as t1 (see FIG. 9), and the upper 63 of the rear seat 104 on which the power supply device 1 according to the present embodiment is not mounted. When the movement amount is t2 (see FIG. 10), t1 <t2. In addition, when the sinking amount of the cushion part 105 in the present embodiment is d1 (see FIG. 9) and the sinking amount of the cushion part 105 when the present embodiment is not applied is d2 (see FIG. 10), d1 <d2. Thereby, it is possible to prevent the occupant 7 such as an infant or a child who rides on the child seat 6 from shaking greatly, and the comfort of the occupant 7 can be improved.

  In the present embodiment, the intake duct 3 is inserted into the duct insertion space 41 of the support member 4, and the wall surface (upper wall portion 34 and partition plate 36) that faces the recessed groove 105 </ b> A through the intake duct 3 is provided. The steel plate is strong enough to support the weight of the passenger. For this reason, in the present embodiment, even when the occupant 8 is seated on the cushion portion 105 above the intake duct 3, the support member 4 indicates that the flow passage cross section of the intake duct 3 is deformed by the weight of the occupant 8. Can be suppressed. Moreover, in this Embodiment, it can prevent deform | transforming with the upper wall part 34 and the partition plate 36 which consist of a steel plate material, and can ensure the regular flow-path cross-sectional shape of the intake duct 3. FIG. As a result, in the present embodiment, even a small amount of air in the passenger compartment can be supplied to the battery pack 2 via the intake duct 3, and the cooling performance of the battery 23 can be improved.

  In general, as shown in FIG. 7, when the occupant 8 sits on the rear seat 104, the occupant 8 tends to sit on the right side or the left side of the rear seat 104 in the vehicle width direction. Therefore, the front right side of the rear seat 104 in the vehicle width direction and the left front side of the vehicle width direction are blocked by the legs of the occupant 8. On the other hand, the center portion of the rear seat 104 in the vehicle width direction is less likely to be ridden by the occupant 8 than the right or left side of the rear seat 104 in the vehicle width direction, and is less likely to be blocked by the legs of the occupant 8. For this reason, by arranging the suction port 31 at the center of the rear seat 104 in the vehicle width direction, the air in the vehicle compartment can be smoothly flowed into the intake duct 3. Also, when the luggage 9 is placed on the front floor panel 101 on the front side of the rear seat 104, the occupant 8 tends to place the luggage 9 in the vicinity of the rear side door in consideration of the accessibility from the rear side door (not shown) to the passenger compartment of the luggage 9. There is. For this reason, the front side of the rear seat 104 in the right side of the vehicle width direction and the front side of the left side in the vehicle width direction tend to be blocked by the luggage 9. On the other hand, since the front part of the rear seat 105 in the vehicle width direction is relatively far from the rear side door, the accessibility of the rear seat 104 tends to avoid placing the luggage 9 in front of the rear part 104 in the vehicle width direction. There is. Thus, by arranging the intake duct 3 at the center in the vehicle width direction, the air in the passenger compartment can be smoothly taken into the intake duct 3 without being blocked by the legs of the occupant 8 or the luggage 9. Therefore, in the present embodiment, as much air as possible can be flowed to the battery pack 2 to reliably improve the cooling performance of the battery 23.

  In the present embodiment, the support member 4 is disposed below the front end portion of the cushion portion 105. That is, in the present embodiment, as shown in FIG. 9, when the vehicle 100 having the child seat 6 mounted on the rear seat 104 stops suddenly or receives an external force F from the front of the vehicle, the load is most applied by the movement of the child seat 6. The support member 4 is arranged at a position where it is easy to do. Thereby, the movement amount of the child seat 6 can be suppressed, and it can be avoided that the passenger 7 feels uncomfortable that the child seat 6 moves greatly (sinks into the cushion portion 105).

  In the present embodiment, when the child seat 6 is mounted on the cushion portion 105 so as to be close to the vehicle width direction end portion of the rear seat 104, the lower portion (lower edge) of the child seat 6 positioned on the center side of the rear seat 104 in the vehicle width direction. ) 64 is set so as to be positioned above the intake duct 3. In the present embodiment, the flow passage cross section of the intake duct 3 is flattened long in the vehicle width direction, so that the lower portion 64 of the child seat 6 is surely positioned above the intake duct 3. For this reason, in the present embodiment, an increase in the amount of sinking of the cushion portion 105 by the intake duct 3 is suppressed, and the vibration and vibration of the child seat 6 are surely reduced, so that the occupant riding on the child seat 6 ( (Infant or child) 7 can be improved.

  Moreover, in this Embodiment, the upper wall part 34 of the intake duct 3 can be supported by the partition plate 36, and it can prevent that the flow-path area of the intake duct 3 is crushed or deform | transformed. For this reason, in this Embodiment, the flow-path area of the intake duct 3 required in order to cool the battery 23 can be ensured, and the cooling performance of the battery 23 can be maintained. Further, as shown in FIGS. 2 and 3, by providing the partition plate 36, the cooling air S2 flowing in the intake duct 3 can be rectified, the ventilation resistance of the cooling air S2 is reduced, and the battery 23 Can improve the cooling performance.

  Further, in the present embodiment, as shown in FIG. 8, even if the vehicle 100 turns and a load is applied from the child seat 6 to the cushion portion 105, the intake duct 3 is crushed or deformed by the partition plate 36. This can be reliably prevented, and the amount of sinking of the cushion portion 105 can be reliably suppressed.

  In general, as shown in FIG. 10, when the occupants 7 and 8 are seated on the cushion portion 105 of the rear seat 104 and the vehicle 100 is suddenly braked, the inertia applied to the occupant 7 or the occupant 8 (see FIG. 8) in the forward direction of the vehicle. Force Fi1 acts. At that time, since the occupants 7 and 8 move from the rear side to the front side of the cushion portion 105, the weight of the occupants 7 and 8 is concentrated on the front end portion of the cushion portion 105, and a load is applied. The load is transmitted to a region below the front end portion of 105, and the region is easily deformed. In addition, if an occupant sits on the center of the cushion portion 105 of the rear seat 104 in the vehicle width direction and the vehicle suddenly brakes, the front end of the intake duct 3 (or by the movement of the occupants 7 and 8 forward) (or , Load is concentrated on the suction port 31), and the front end portion (or the suction port 31) of the suction duct 3 is attempted to be deformed.

  Therefore, in the present embodiment, as shown in FIG. 9, the vehicle 100 is suddenly braked by disposing the support member 4 in the above-described region (the region below the front end portion of the cushion portion 105 in the rear floor panel 103). Even when the inertial force Fi1 applied to the front of the vehicle acts on the occupants 7 and 8, the region where the load tends to concentrate can be reinforced by the support member 4, and the deformation of the rear floor panel 103 can be prevented.

  In the present embodiment, the front end of the intake duct 3 is installed in the duct insertion space 41 of the support member 4, and the bracket 42 that covers the upper side of the front end of the intake duct 3 is attached to the support member 4. Thus, the outer peripheral surface of the front end portion of the intake duct 3 can be reinforced with the support member 4 and the bracket 42. As a result, the suction port 31 that is the front end portion of the intake duct 3 can be reliably prevented from being crushed and blocked, and sufficient air can be supplied from the suction port 31 into the battery pack 2 to improve the cooling performance of the battery 23. be able to.

(Other embodiments)
Although the embodiment has been described above, it should not be understood that the description and the drawings, which form part of the disclosure in this 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-described embodiment, the front end portion of the intake duct 3 (the lower portion of the cushion portion 105) has a structure in which the upper wall portion 34 and the lower wall portion 35 are separated by a slit extending in the longitudinal direction. The upper wall portion 34 and the lower wall portion 35 of the front end portion of the duct 3 may be formed in a single plate shape, and the three passages 32 may be partitioned by only one partition plate 36 from each other. Further, when the strength of the intake duct 3 itself is high, it may be a duct having only one passage.

  Moreover, in the said embodiment, as shown in FIG. 5, although the duct insertion space 41 provided in the center part of the longitudinal direction of the support member 4 was formed in concave shape, as shown in FIG. The support member 4A may be formed with a duct insertion space 41A penetrating in the direction, or may be a support member 4B formed with a concave duct insertion space 41B as shown in FIG.

DESCRIPTION OF SYMBOLS 1 Power supply device 2 Battery pack 3 Intake duct 4 Support member 5 Cooling fan 6 Child seat 7,8 Crew 9 Cargo 21 Case 22 Battery module 23 Battery 31 Inlet 32 Passage 33 Passage 34 Upper wall part 35 Lower wall part 36 Partition plate (side wall Part)
41 Duct insertion space 42 Bracket 61 Mounting part 62 Front end lower part 63 Upper part 64, 65 Side part 100 Vehicle 101 Front floor panel 102 Step part 103 Rear floor panel 104 Rear seat 105 Cushion part 105A Concave groove 106 Seat back

Claims (5)

A battery pack in which a rear seat is disposed on an upper surface of a rear floor panel provided so as to extend rearward of the front floor panel through a stepped portion rising from the front floor panel, and a battery is housed behind the rear seat on the upper surface of the rear floor panel. Is disposed, and an air intake duct that extends forward from the battery pack in the front-rear direction of the vehicle and takes air in the vehicle compartment into the battery pack is disposed between the cushion portion of the rear seat and the rear floor panel. In the pack cooling device,
A concave groove extending in the vehicle front-rear direction is formed in the center of the lower surface of the cushion portion in the vehicle width direction, and a support member extending in the vehicle width direction is disposed below the cushion portion on the upper surface of the rear floor panel. In the member, in a region intersecting the concave groove, a duct insertion space for inserting the intake duct is formed,
The air intake duct extends from the battery pack through the concave groove forward in the vehicle front-rear direction, the front portion of the air intake duct is disposed in the duct insertion space, and the air intake duct can support the weight of an occupant. Having
A cooling apparatus for a battery pack for vehicles.   The cooling device for a vehicle battery pack according to claim 1, wherein the support member is disposed below a front end portion of the cushion portion. The intake duct has a flat shape with a long cross-section along the vehicle width direction,
When the child seat is mounted on the cushion portion by approaching the vehicle seat width direction end of the rear seat, at least a part of the lower portion of the child seat located on the center side of the rear seat in the vehicle width direction is the intake duct. The cooling device for a vehicle battery pack according to claim 1 or 2, wherein the cooling device is set to be positioned above. The intake duct includes a plurality of partition plates,
Each of the plurality of partition plates is erected between an upper wall portion and a lower wall portion of the intake duct, and extends in the vehicle front-rear direction along the flow path of the intake duct to define an internal space of the flow path. The cooling device for a vehicle battery pack according to any one of claims 1 to 3, wherein the cooling device is provided so as to be divided into a plurality of sections.   The front end portion of the intake duct is disposed in the duct insertion space of the support member, and a bracket is attached to the support member so as to cover the front end portion of the intake duct. The vehicle battery pack cooling device according to any one of claims 1 to 4.

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