Vehicle electrical equipment cooling structure

Abstract

A cooling structure for electrical equipment in a vehicle (10) comprises: a blower (40); a recess (22) provided at least at one location in a rear floor chassis (20) of the vehicle; and an exhaust pipe (44) for exhausting air sent from the blower (40) into the recess (22), wherein the exhaust port (4402) of the exhaust pipe (44) is inclined and recessed so that the portion at the front of the vehicle is located further below the portion at the rear of the vehicle. With this cooling structure, the heated cooling air can flow smoothly along the side surface (2204A) of the tire compartment (22) toward the rear of the vehicle.

Description

Technical Field

[0001] The present disclosure relates to a cooling structure for vehicle electrical equipment. Background Art

[0002] The present invention provides a vehicle in which a battery is arranged at the lower part of the vehicle body, for example, on the floor of a trunk, and voltage is supplied from the battery to a waiting voltage supply part of the vehicle.

[0003] If the battery generates heat during operation and reaches a high temperature, it will be disadvantageous in terms of performance, so the battery needs to be cooled appropriately.

[0004] Therefore, a vehicle has been proposed that uses a cooling fan to cool the battery with the air in the vehicle cabin and discharges the cooled and heated cooling air into a tire storage recess (tire well) formed in the floor of the trunk (see Japanese Patent No. 4023450).

[0005] However, in the above-mentioned prior art, the terminal end of the exhaust pipe that guides cooling air is formed to extend in the vertical direction. Therefore, the cooling air is blown from a substantially vertical direction toward the side or bottom of the recess (tire well), and the cooling air reaching the recess does not flow in the predetermined direction but rather diverges. Summary of the Invention

[0006] Technical problem to be solved by the invention

[0007] The present disclosure provides a vehicle electrical equipment cooling structure capable of rectifying the flow of cooling air reaching a recessed portion in a desired direction.

[0008] According to a first aspect of the present disclosure, a cooling structure for vehicle electrical equipment includes a battery and a DC / DC converter positioned adjacent to the battery in the vehicle width direction. The structure comprises: a blower positioned directly above the DC / DC converter, which draws and exhausts air to form an air passage that flows sequentially between the battery and the DC / DC converter; a recessed portion provided in at least one location of a rear floor pan located at the rear of the vehicle; and an exhaust duct provided on the blower to exhaust the air sent from the blower into the recessed portion. The exhaust duct has an exhaust port that is inclined and recessed so that the vehicle-front portion of the exhaust port is positioned lower than the vehicle-rear portion.

[0009] Effects of the Invention

[0010] According to the above aspect, the cooling air is blown from the blower to the exhaust duct, and is blown from the exhaust port to the side surface of the recessed portion through the exhaust duct.

[0011] At this time, since the exhaust port of the exhaust pipe is inclined and recessed so as to be positioned downward as it approaches the front side of the vehicle, the cooling air with increased temperature can flow smoothly along the side toward the rear of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a plan view of a vehicle to which the vehicle battery cooling structure according to the embodiment is applied.

[0013] Figure 2 This is a perspective view of the vehicle battery cooling structure according to the embodiment as viewed from the rear of the vehicle.

[0014] Figure 3 This is an exploded perspective view of the vehicle battery cooling structure according to the embodiment as viewed from the front of the vehicle.

[0015] Figure 4 This is an exploded perspective view of the vehicle battery cooling structure according to the embodiment as viewed from the rear of the vehicle.

[0016] Figure 5 This is a side view of the vehicle battery cooling structure according to the embodiment, viewed from the side of the vehicle.

[0017] Figure 6 It is a bottom view of a vehicle to which the vehicle battery cooling structure according to the embodiment is applied, and shows an enlarged view of a portion where the battery cooling structure is provided.

[0018] Figure 7A It is a three-dimensional diagram of the battery pack.

[0019] Figure 7B This is a perspective view of the battery pack in a state where it is turned upside down.

[0020] Figure 8A This is a side view of a battery cooling structure applied to a vehicle equipped with a third row of seats, viewed from the side of the vehicle, showing a state in which the third row of seats is in use.

[0021] Figure 8B This is a side view of a battery cooling structure applied to a vehicle equipped with a third row of seats, as viewed from the side of the vehicle, showing a state in which the third row of seats is stowed.

[0022] Figure 9 This is a cross-sectional view taken along a section perpendicular to the vehicle front-rear direction, where the interior of the battery pack and the interior of the side member are connected via the exhaust hose.

[0023] Figure 10 This is an exploded perspective view showing the battery, DC / DC converter, blower, blower bracket, and frame.

[0024] Figure 11A This is a plan view of the blower.

[0025] Figure 11B This is a bottom view of the blower.

[0026] Figure 11C It is from Figure 11A The figure is viewed from the direction indicated by arrow C.

[0027] Figure 12 It is a plan view showing a portion of the rear floor chassis.

[0028]

Explanation of symbols

[0029] 10 vehicles

[0030] 20 rear bottom plate chassis

[0031] 22 tire well (recess)

[0032] 2202 bottom

[0033] 2204 side

[0034] 2204A inclined surface (front side)

[0035] 24 battery pack

[0036] 26 third row seats

[0037] 28 cargo boxes

[0038] 3048V battery (battery)

[0039] 32DC / DC converter

[0040] 3202DC / DC converter body

[0041] 3204 heat sink

[0042] 34 longitudinal beams

[0043] 36 seat beam

[0044] 38 frames

[0045] 38A front frame

[0046] 38B rear frame

[0047] 38C middle frame

[0048] 40 Blower

[0049] 4010 suction port

[0050] 4012 blow outlet

[0051] 44 exhaust pipe

[0052] 4402 exhaust port

[0053] 4402A end face

[0054] 46 covers

[0055] 54 rear suspension beam

[0056] 56 Intake pipe

[0057] S1 Containment Space DETAILED DESCRIPTION

[0058] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

[0059] In the following drawings, symbol UP indicates the upper side of the vehicle, symbol FR indicates the front side of the vehicle, symbol IN indicates the inner side in the vehicle width direction, and symbol OUT indicates the outer side in the vehicle width direction.

[0060] In addition, in this embodiment, the case where the present disclosure is applied to a vehicle equipped with a belt starter generator (hereinafter referred to as BSG) will be described.

[0061] The BSG can perform regenerative driving and power running driving according to the operating state of the engine. During regenerative driving, the generated 48V DC voltage is supplied to a 48V battery as the battery of the present disclosure described later via an inverter (not shown) for charging.

[0062] Furthermore, the BSG is supplied with voltage from the 48V battery during power running, and thus functions as an auxiliary power source that assists the engine output during running while starting the engine.

[0063] like Figure 1 As shown, an engine 14 , a BSG 16 connected to the engine 14 via a belt (not shown), and a 12V battery 18 for auxiliary devices are arranged in an engine room 12 of the vehicle 10 .

[0064] like Figures 1 to 4 As shown, a tire well 22 serving as a recessed portion is provided in the rear floor pan 20 behind the second row of seats 19 of the vehicle 10. A battery pack 24 to which the present disclosure is applied is disposed above the front half of the tire well 22. Furthermore, a third row of seats 26 (see FIG. 1 ) is disposed above the battery pack 24 in a foldable manner. Figure 8A 、 Figure 8B ).

[0065] The tire well 22 usually houses a spare tire, but in this embodiment, Figure 5 As shown, instead of housing a spare tire in the tire well 22 , a portion of the battery pack 24 is housed therein, and a cargo box 28 serving as a small item box is detachably housed therein.

[0066] like Figure 5 、 Figure 12As shown, the tire well 22 is provided at the rear portion of the rear floor chassis 20 and is open upwardly at the center in the vehicle width direction.

[0067] The tire well 22 includes a bottom surface 2202 provided at a position displaced downward from the rear floor chassis 20 surrounding the tire well 22 and a side surface 2204 connecting the entire periphery of the bottom surface 2202 and the rear floor chassis 20 .

[0068] The side surface 2204 is formed to be gradually tilted downward as it reaches the bottom surface 2202. Figure 5 As shown, a front side surface 2204A located in the front of the vehicle in the tire well 22 is formed as an inclined surface 2204A that is inclined downward toward the rear of the vehicle.

[0069] In the present embodiment, the present disclosure is described as being applied to the vehicle 10 having the third row of seats 26 , but the present disclosure is also applicable to a vehicle having two rows of seats, namely, front seats and rear seats.

[0070] like Figure 1 As shown, the battery pack 24 includes a 48V battery 30 , a DC / DC converter 32 , and the like.

[0071] The 48V battery 30 supplies a 48V DC voltage to the BSG 16 via the first cable C1 during power running of the BSG 16 , and supplies a 48V DC voltage from the BSG 16 via the first cable C1 and the inverter during regenerative driving of the BSG 16 .

[0072] The DC / DC converter 32 converts the 48V DC voltage output from the 48V battery 30 into a 12V DC voltage, and supplies the voltage to the 12V battery 18 via the second cable C2 , thereby charging the 12V battery 18 .

[0073] It should be noted that the first cable C1 and the second cable C2 are schematically shown in the figure.

[0074] like Figure 2 、 Figure 12 As shown, a pair of longitudinal beams 34 are provided at the lower rear portion of the second row of seats 19, spaced apart in the vehicle width direction and extending in the vehicle front-rear direction; a rear floor chassis 20 is provided between the pair of longitudinal beams 34; and a seat cross member 36 is provided in the vehicle front-rear direction intermediate portion of the rear floor chassis 20, extending in the vehicle width direction and connecting the pair of longitudinal beams 34.

[0075] In this embodiment, if Figure 5 As shown, the seat cross member 36 is composed of two members: an upper seat cross member 36A provided on the rear floor chassis 20 ; and a lower seat cross member 36B provided on the rear floor chassis 20 .

[0076] like Figure 2 As shown, the second row of seats 19 is arranged via a seat cross member 36 .

[0077] like Figure 2 As shown in FIG. 1 , a battery pack 24 is arranged on the rear floor chassis 20 behind the second row of seats 19. Figure 2 Illustration of a cover 46 and a sheet metal cover 52 , which will be described later and constitute the battery pack 24 , is omitted.

[0078] like Figure 3 、 Figure 4 As shown, the battery pack 24 includes a frame 38 , a blower 40 , a blower bracket 42 , an exhaust duct 44 , a cover 46 , and a sheet metal cover 52 , in addition to the 48V battery 30 and the DC / DC converter 32 .

[0079] like Figure 6 As shown, the portion of the lower surface of the rear floor chassis 20 where the battery pack 24 is disposed is enhanced in strength and rigidity by the rear suspension cross member 54 , which is beneficial for protecting the battery pack 24 during a rear collision.

[0080] Specifically, a rear suspension cross member 54 is disposed below the rear floor chassis 20 . Both ends of the rear suspension cross member 54 in the vehicle width direction are connected to the longitudinal members 34 . The battery pack 24 is disposed within the outline of the rear suspension cross member 54 in a plan view.

[0081] It should be noted that the symbol P in the figure represents the connection point between the rear suspension cross member 54 and the longitudinal member 34.

[0082] In the drawings, reference numeral 55 denotes a cross member provided at a portion of the lower surface of the rear floor chassis 20 where the tire well 22 is formed. Both ends of the cross member 55 are connected to the longitudinal members 34 .

[0083] like Figure 3 、 Figure 4 As shown, a frame 38 is used to mount the battery pack 24 to the vehicle body.

[0084] The frame 38 includes a front frame 38A extending in the vehicle width direction at the front of the vehicle, a rear frame 38B extending in the vehicle width direction at the rear of the vehicle, and a plurality of intermediate frames 38C extending in the vehicle front-rear direction at a plurality of locations spaced apart in the vehicle width direction and connecting the front frame 38A and the rear frame 38B.

[0085] The front frame 38A overlaps with the upper surface of the seat cross member 36 at a plurality of locations spaced apart in the vehicle width direction and is fastened with screws.

[0086] like Figure 2As shown, the rear frame 38B overlaps with the upper surface of the rear floor chassis 20, whose ends 3802 overlap with the pair of longitudinal beams 34, and is fastened by screws.

[0087] The middle portion 3804 of the rear frame 38B excluding both ends 3802 is arranged to straddle the portion of the tire well 22 near the vehicle front, and a space S0 is formed between the middle portion 3804 and the bottom surface 2202 of the tire well 22 .

[0088] Furthermore, three mounting pieces 3810 are provided protrudingly from three locations spaced apart in the vehicle width direction at the vehicle rear portion of the middle portion of the rear frame 38B.

[0089] Each mounting piece 3810 extends downward from the middle portion 3804 of the rear frame 38B, extends from its lower end through a curved portion toward the rear of the vehicle, and is fastened to a mounting piece 5208 of the sheet metal cover 52 described later by screws from above at its front end. Figure 4 ).

[0090] like Figure 9 As shown, the 48V battery 30 includes a plurality of battery cells (not shown), a battery case 3002 that is rectangular in plan view and houses these battery cells, and a smoke exhaust cover 3004 that forms a gap with the upper portion of the battery case 3002 and covers the upper portion of the battery case 3002 .

[0091] like Figure 3 、 Figure 4 As shown, the battery housing 3002 is placed on a plurality of intermediate frames 38C and is fastened to the intermediate frames 38C by screws.

[0092] like Figure 9 As shown, the fume exhaust cover 3004 and the battery cover 46 are sealed by a sealing member 3006, and the space between the fume exhaust cover 3004 and the battery cover 46 is airtight.

[0093] One end of a smoke exhaust hose 3010 is connected to a portion of the smoke exhaust cover 3004 close to one of the longitudinal beams 34 via a sealing member 3006 , and the other end of the smoke exhaust hose 3010 passes through the rear floor chassis 20 and is disposed inside the longitudinal beam 34 .

[0094] Therefore, when gas is released from the battery cells, the gas is guided from an opening (not shown) provided in the upper portion of the battery case 3002 through the exhaust hose 3010 to the inside of the side member 34 and then discharged to the outside of the vehicle 10 to prevent gas leakage into the vehicle interior.

[0095] like Figure 10As shown, the DC / DC converter 32 is rectangular in plan view, and the DC / DC converter 32 and the 48V battery 30 are arranged in parallel in the vehicle width direction. The DC / DC converter 32 is arranged adjacent to the 48V battery 30 in the vehicle width direction.

[0096] like Figure 5 As shown, the DC / DC converter 32 includes a DC / DC converter body 3202 that converts a 48V DC voltage supplied from the 48V battery 30 into a 12V DC voltage, and a heat sink 3204 provided on the upper surface of the DC / DC converter body 3202 .

[0097] In this embodiment, the heat sink 3204 includes a plate portion 3206 attached to the upper surface of the DC / DC converter body 3202 and a plurality of shaft-shaped heat sink bodies 3208 protruding from the upper surface of the plate portion 3206 .

[0098] The DC / DC converter body 3202 is placed on the middle frames 38C and is fastened to the middle frames 38C by screws.

[0099] like Figure 10 As shown, the blower 40 is arranged directly above the heat sink 3204 to suck and exhaust air, forming a channel for cooling air to flow sequentially in the order of the 48V battery 30 and the DC / DC converter 32.

[0100] like Figure 11A 、 11B As shown in FIG11C , the blower 40 includes a housing 4002 , a centrifugal impeller 4004 , and a motor 4006 .

[0101] The centrifugal impeller 4004 is provided on the annular portion 4002A of the casing 4002 and is supported so as to be rotatable about the rotation axis 4008 .

[0102] An inlet 4010 is provided at one axial end portion of the annular portion 4002A, and an outlet 4012 protruding in a tangential direction is provided at one circumferential position of the annular portion 4002A.

[0103] The motor 4006 is provided at the other axial end portion of the annular portion 4002A and rotates the rotating shaft 4008 .

[0104] When the centrifugal impeller 4004 is rotated by the motor 4006 via the rotating shaft 4008 , a negative pressure is created at the suction port 4010 , so that air is sucked from the suction port 4010 and blown out from the blowout port 4012 .

[0105] like Figure 10 As shown, in this embodiment, the blower 40 is mounted on the heat sink 3204 via a blower bracket 42 .

[0106] The blower bracket 42 includes: a rectangular plate portion 4202 formed with a contour substantially the same as that of the DC / DC converter 32; a circular hole 4204 formed in the plate portion 4202 with a diameter substantially the same as that of the suction port 4010; and an annular sealing member 4206 arranged on the entire edge of the circular hole 4204.

[0107] The front parts 4208 and 4210 of the blower bracket 42 are mounted on the front frame 38A by screws, and the rear flange 4212 is mounted on the middle frame 38C by screws. The plate part 4202 is arranged at a position away from the top of the multiple heat sink bodies 3208.

[0108] like Figure 10 As shown in Figure 11, by aligning the suction port 4010 with the circular hole 4204 of the blower bracket 42, a front mounting plate 4020 is installed on the front of the blower bracket 42 via screws, and the two rear mounting plates 4022 and 4024 are installed on the rear of the blower bracket 42 via screws, and the blower 40 is set on the DC / DC converter 32.

[0109] In this state, the suction port 4010 faces the heat sink 3204 , and the suction port 4010 of the blower 40 and the circular hole 4204 of the blower bracket 42 are adhered to each other without a gap via the sealing member 4206 .

[0110] like Figure 3 、 Figure 4 、 Figure 7A as well as Figure 7B As shown, the cover 46 includes a lower cover 48 and an upper cover 50 .

[0111] The lower cover 48 covers the frame 38 , the 48V battery 30 , and the lower portion of the DC / DC converter 32 , and is made of synthetic resin.

[0112] The lower cover 48 includes a bottom wall 4802 that is a rectangular shape that is horizontally long in the vehicle width direction when viewed from above, side walls 4804 that rise from four sides of the bottom wall 4802 , and a lower flange 4806 that curves from the upper end of the side wall 4804 .

[0113] The lower cover 48 is fastened to the middle frames 38C via screws in a state where the middle frames 38C of the frame 38 overlap with the upper surface of the bottom wall 4802 .

[0114] like Figure 3 、 Figure 7B As shown, an opening 4808 for exposing the exhaust port 4402 of the exhaust pipe 44 is provided at an end portion of the bottom wall 4802 on the vehicle rear side, which is closer to the outer side in the vehicle width direction.

[0115] like Figure 7B As shown, a cutout 4810 is provided on the side wall 4804 located on one short side of the rectangle of the bottom wall 4802 to expose one end 3802 of the rear frame 38B, and a cutout 4812 is provided on the side wall 4804 located on the other short side to expose the other end 3802 of the rear frame 38B.

[0116] Furthermore, a cutout 4814 for exposing the middle portion 3804 of the front frame 38A is provided in a side wall 4804 located on one long side of the rectangular bottom wall 4802 .

[0117] In addition, a side wall 4804 located on the other long side of the rectangle of the bottom wall 4802 is provided with a cutout 4816 for exposing the three mounting pieces 3810 of the rear frame 38B.

[0118] like Figure 3 、 Figure 4 As shown, the upper cover 50 covers the frame 38 , the 48V battery 30 , the DC / DC converter 32 , and the blower 40 , and is made of synthetic resin.

[0119] The upper cover 50 includes an upper wall 5002 that is a rectangular shape that is horizontally long in the vehicle width direction when viewed from above, side walls 5004 that are perpendicularly provided from four sides of the upper wall 5002 , and an upper flange 5006 that is bent from the lower end of the side wall 5004 .

[0120] like Figure 7A As shown, the side walls 5004 located on a pair of short sides of the rectangle of the upper wall 5002 are provided with a notch 5006 for leading the exhaust hose 3010 to the outside of the cover 46 and an intake pipe notch 5008 for introducing the intake pipe 56 described later into the interior of the cover 46.

[0121] The upper cover 50 is mounted on the lower cover 48 by clip connection in a state where the upper flange 5006 and the lower flange 4806 overlap, thereby forming the cover 46 .

[0122] like Figure 9 As shown, the cover 46 composed of the lower cover 48 and the upper cover 50 forms a storage space S1 for accommodating the 48V battery 30, the DC / DC converter 32, and the blower 40. Figure 7A 、 Figure 7B As shown, the rear frame 38B and the front frame 38A for mounting the 48V battery 30 , the DC / DC converter 32 , the blower 40 , etc. on the vehicle body are exposed from the cover 46 .

[0123] like Figure 3 、 Figure 4 As shown, the sheet metal cover 52 covers the cover 46 from above to protect the battery pack 24 and is made of sheet metal.

[0124] The sheet metal cover 52 includes: an upper wall 5202, which is a rectangle that is long horizontally in the vehicle width direction when viewed from above; a pair of side walls 5204, which are perpendicularly arranged from a pair of long sides of the upper wall 5202; a plurality of front side mounting pieces 5206, which protrude from the lower end of one side wall 5204 toward the front of the vehicle; and a plurality of rear side mounting pieces 5208, which protrude from the lower end of the other side wall 5204 toward the rear of the vehicle.

[0125] The plurality of front mounting pieces 5206 overlap with the upper surface of the seat cross member 36 and are fastened by screws.

[0126] The plurality of rear side mounting pieces 5208 overlap with the mounting pieces 3810 of the rear frame 38B and are fastened with screws.

[0127] like Figure 2 As shown, the air intake duct 56 introduces the air in the vehicle interior including the trunk into the accommodation space S1 in the lid 46 .

[0128] One end 5602 of the air intake pipe 56 is inserted through the air intake pipe cutout 5008 ( Figure 7A ) is airtightly inserted into the accommodation space S1 and is located outside the 48V battery 30 in the vehicle width direction within the accommodation space S1.

[0129] The portion connected to one end 5602 of the intake duct 56 is inserted between the interior panel 58 and the outer panel (not shown) through the cutout 5802 of the interior panel 58 constituting the side of the trunk, and most of the intake duct 56 including the other end 5604 of the intake duct 56 is located between the interior panel 58 and the outer panel, and the other end 5604 of the intake duct 56 is embedded in the opening 5804 provided at the portion of the interior panel 58 separated upward from the rear floor chassis 20.

[0130] like Figure 5 、 Figure 11A 、 Figure 11B as well as Figure 11C As shown, the exhaust duct 44 is provided between the blower 40 and the tire compartment 22 , and exhausts the cooling air sent from the blower 40 into the tire compartment 22 .

[0131] like Figure 2 As shown, the exhaust pipe 44 is arranged on the opposite side of the 48V battery 30 when viewed from the blower 40 in the vehicle width direction, and the upstream end of the exhaust pipe 44 is airtightly connected to the blower outlet 4012, as shown in FIG. Figure 5 As shown, the exhaust port 4402 is located at the opening portion 4808 of the lower cover 48 .

[0132] That is, exhaust port 4402 is arranged at one end in the vehicle width direction behind the DC / DC converter 32. In other words, exhaust port 4402 is offset from DC / DC converter 32 in the vehicle width direction. In addition, exhaust port 4402 is arranged in the vehicle rear of DC / DC converter 32.

[0133] Furthermore, the exhaust port 4402 faces the inclined surface 2204A of the tire well 22. In other words, the exhaust port 4402 faces the inclined surface 2204A.

[0134] To form a cooling airflow along the side surface 2204 of the tire well 22 , the exhaust duct 44 has an end portion that is obliquely recessed so that the exhaust port 4402 of the exhaust duct 44 is positioned downward toward the vehicle front.

[0135] The end surface of exhaust pipe 44 constituting exhaust port 4402, that is, end surface 4402A of exhaust port 4402, is arranged at a substantially right angle to inclined surface 2204A of tire well 22. Specifically, a virtual plane including end surface 4402A of exhaust port 4402 is arranged at a substantially right angle to inclined surface 2204A of tire well 22.

[0136] In addition, the exhaust port 4402 opens toward the space S3 formed between the tire well 22 and the cargo box 28 .

[0137] In addition, in this embodiment, Figure 8A 、 Figure 8B As shown, the third row of seats 26 is arranged above the battery pack 24 , that is, above the blower 40 .

[0138] Specifically, a panel 60A is provided on the rear floor chassis 20 near the rear of the vehicle. The panel 60A is formed into a bulge 60 that protrudes upward, has a certain width in the front-to-rear direction of the vehicle, and extends along the width direction of the vehicle. The bulge 60 is formed above the battery pack 24 and the rear floor chassis 20 and has a flat upper surface. The third row of seats 26 is arranged above the bulge 60.

[0139] Therefore, the battery pack 24 is housed in the space S4 inside the bulged portion 60 at the lower portion of the third row seat 26 .

[0140] The lower back panel 62 rises from the vehicle rear end of the rear floor chassis 20 , and therefore a receiving recess 64 sandwiched between the bulging portion 60 and the lower back panel 62 is formed in the rear floor chassis 20 at the vehicle rear end of the bulging portion 60 .

[0141] like Figure 8A As shown, the third row seat 26 includes a seat cushion 2602 , a seat back 2604 , a headrest 2606 , and a support plate 2608 .

[0142] The third row seat 26 is configured to include a seat cushion 2602 disposed on the upper surface of the bulged portion 60 , a seat back 2604 , and a headrest 2606 in a normal state where a user can sit.

[0143] In addition, the tray 2608 is housed between the seat cushion 2602 and the upper surface of the bulging portion 60 in a state of being folded in two.

[0144] The seat cushion 2602 is rotatably provided in the front-rear direction of the vehicle with the rear portion of the seat cushion 2602 serving as a fulcrum.

[0145] The seat back 2604 is rotatably provided in the front-rear direction of the vehicle with the rear portion of the seat cushion 2602 as a fulcrum, and the headrest 2606 is rotatably provided relative to the seat back 2604 .

[0146] Moreover, if Figure 8A As shown, the seat back 2604 stands upward from the rear of the seat cushion 2602 and the headrest 2606 extends upward from the upper end of the seat back 2604. Figure 8B As shown, the headrest 2606 is rotated toward the front of the vehicle in a manner overlapping with the seat cushion 2602, and then the seat back 2604 is folded in a manner overlapping the seat cushion 2602. In this state, the seat cushion 2602 is rotated 180 degrees (reversed) toward the rear of the vehicle with the rear portion of the seat cushion 2602 as a fulcrum. By being in a reversed state housed in the receiving recess 64, the lower surface of the seat cushion 2602 becomes facing upward.

[0147] At this time, the flat bottom surface of the trunk is formed by unfolding the pallet 2608 folded in half between the bulge 60 and the seat cushion 2602 and placing it on the upper surface of the bulge 60, the lower surface of the inverted seat cushion 2602, and the lower back panel 62.

[0148] Therefore, when the third seat row 26 is provided, the battery pack 24 can be housed using the space S4 below the seat cushion 2602 of the third seat row 26 and the tire well 22 , which is advantageous in ensuring a larger space in the vehicle interior.

[0149] In addition, in this embodiment, the case where the vehicle 10 has a third row of seats 26 is described, but in the case where the vehicle 10 has two rows of seats, namely front seats and rear seats, the bottom surface of the trunk is formed by placing a tray 2608 from the upper surface of the bulge 60 to the lower back panel 62.

[0150] Therefore, in the case of a vehicle with two rows of seats, namely, front seats and rear seats, the battery pack 24 can be arranged without sacrificing trunk space, which is advantageous in ensuring a larger space in the vehicle interior.

[0151] Next, the effects will be described.

[0152] The 48V battery 30 supplies a 48V DC voltage to the BSG 16 , whereby the temperature of the 48V battery 30 rises.

[0153] Furthermore, the 48V battery 30 supplies a 48V DC voltage to the DC / DC converter 32 , and supplies a 12V DC voltage converted by the DC / DC converter 32 to the 12V battery 18 , thereby increasing the temperature of the DC / DC converter 32 .

[0154] In this state, when the blower 40 is driven, the suction port 4010 of the blower 40 becomes negative pressure, so that the air in the vehicle interior is introduced into the accommodation space S1 through the intake pipe 56 as cooling air. The cooling air introduced into the accommodation space S1 forms a cooling air channel that flows in the order of the 48V battery 30 and the DC / DC converter 32.

[0155] That is, the cooling air passes through the space between the cover 46 and the surface of the 48V battery 30 , and then passes through the space between the cover 46 and the heat sink 3204 of the DC / DC converter 32 .

[0156] Thus, the 48V battery 30 and the DC / DC converter 32 are cooled by the cooling air, and the performance of the 48V battery 30 and the DC / DC converter 32 is maintained.

[0157] The cooling air whose temperature has risen after passing through the space between the cover 46 , the 48V battery 30 , and the heat sink 3204 is introduced from the blower bracket 42 into the suction port 4010 of the blower 40 .

[0158] At this time, since the blower bracket 42 and the blower 40 are adhered by the sealing member 4206 , cooling air does not leak from a gap between the blower bracket and the blower 40 .

[0159] like Figure 5 As shown, the cooling air introduced into the suction port 4010 of the blower 40 is blown out from the blower port 4012 of the blower 40 toward the exhaust pipe 44 , and then blown out from the exhaust port 4402 toward the tire well 22 through the exhaust pipe 44 .

[0160] At this time, since the exhaust port 4402 of the exhaust duct 44 is inclined and recessed so as to be positioned downward as it approaches the front side in the vehicle longitudinal direction, the heated cooling air can flow smoothly toward the rear of the vehicle along the side surface of the tire well 22, that is, along the inclined surface 2204A. In other words, the heated cooling air flows from the inclined surface 2204A toward the bottom surface 2202 of the tire well 22, and then, after a while, is dispersed into the trunk space above the tire well 22 through the gap formed around the pallet 2608.

[0161] Therefore, the cooling air with increased temperature blown out from the exhaust port 4402 flows smoothly along the side of the tire compartment 22 to the bottom surface 2202 of the tire compartment 22. Therefore, the flow of the cooling air reaching the tire compartment 22 does not diverge in an uncertain direction as in the past, which is conducive to rectifying the flow of the cooling air reaching the tire compartment 22 in the desired direction.

[0162] Furthermore, in this embodiment, since the exhaust port 4402 and the inclined surface 2204A are arranged relative to each other, the cooling air blown out from the exhaust port 4402 with increased temperature flows more smoothly toward the rear of the vehicle along the inclined surface 2204A, thereby further facilitating the flow of the cooling air reaching the tire compartment 22 in the desired direction.

[0163] In addition, since the exhaust port 4402 opens toward the space S3 formed between the tire compartment 22 and the cargo box 28, the cooling air is reliably blown out from the exhaust port 4402 to the space S3 formed between the tire compartment 22 and the cargo box 28. The flow of the cooling air reaching the tire compartment 22 will not diverge uncertainly in a prescribed direction as in the past, which is beneficial for rectifying the flow of the cooling air reaching the tire compartment 22 in a desired direction.

[0164] In addition, in this embodiment, since the exhaust pipe 44 is arranged on the opposite side of the 48V battery 30 when viewed from the blower 40 in the vehicle width direction, the exhaust pipe 44 can be separated from the 48V battery 30 in the vehicle width direction, which is beneficial for suppressing the heat transfer of the cooling air whose temperature rises through the exhaust pipe 44 to the 48V battery 30, and is beneficial for ensuring the cooling efficiency of the 48V battery 30.

[0165] In addition, in this embodiment, since the exhaust port 4402 is offset from the DC / DC converter 32 in the vehicle width direction, the exhaust pipe 44 can be separated from the 48V battery 30 to a greater extent in the vehicle width direction, and the heat transfer of the cooling air whose temperature rises through the exhaust pipe 44 to the 48V battery 30 can be further suppressed, which is more conducive to ensuring the cooling efficiency of the 48V battery 30.

[0166] Furthermore, in the present embodiment, since exhaust port 4402 is arranged on the vehicle rear side of DC / DC converter 32 , exhaust port 4402 can be separated from DC / DC converter 32 in the vehicle front-rear direction.

[0167] Therefore, it is advantageous to suppress the transfer of heat of the cooling air whose temperature has risen through exhaust port 4402 to DC / DC converter 32 , and it is advantageous to ensure the cooling efficiency of DC / DC converter 32 .

[0168] Furthermore, in the present embodiment, the third-row seat 26 is disposed above the blower 40, that is, the third-row seat 26 is disposed above the blower 40, the DC / DC converter 32, and the 48V battery 30. This facilitates securing a larger interior space because the space S4 below the third-row seat 26 and the tire well 22 can be utilized to accommodate the blower 40, the DC / DC converter 32, and the 48V battery 30.

[0169] In addition, in this embodiment, a cover 46 is provided with a storage space S1 for accommodating a 48V battery 30, a DC / DC converter 32 and a blower 40. An intake pipe 56 is provided on the cover 46 for introducing air in the vehicle cabin into the storage space S1. Since the exhaust port 4402 is exposed to the outside of the cover 46 through the opening portion 4808, it is beneficial to utilize the air in the vehicle cabin to effectively cool the 48V battery 30 and the DC / DC converter 32.

[0170] It should be noted that in this embodiment, a case where a 48V battery that supplies a 48V DC voltage to the BSG is used as a battery is described, but the type of the standby voltage supply unit for the battery supply voltage, the output voltage of the battery, etc. are arbitrary, and the present disclosure is applicable to various previously known batteries.

[0171] In addition, in this embodiment, the case where the recessed portion is the tire well 22 is described, but the present disclosure is applicable to various conventionally known recessed portions formed in a rear floor pan for accommodating small items or tools.

[0172] This application is based on Japanese patent application No. 2020-122240 filed on July 16, 2020, the contents of which are incorporated herein by reference.

Claims

1. A cooling structure for vehicle electrical equipment, characterized in that: A vehicle comprising a battery and a DC / DC converter arranged adjacent to the battery in the vehicle width direction, and having: a blower disposed just above the DC / DC converter, sucking and exhausting air to form the air passage for air to flow in the order of the battery and the DC / DC converter; a recessed portion provided at least at one location on a rear floor chassis located at the rear of the vehicle; as well as an exhaust pipe provided on the blower to discharge the air sent from the blower into the recessed portion, The exhaust port of the exhaust pipe is recessed obliquely so that a vehicle front side portion of the exhaust port is located lower than a vehicle rear side portion.

2. The vehicle electrical equipment cooling structure according to claim 1, characterized in that: The recessed portion has an inclined surface extending downward toward the rear of the vehicle, and the exhaust port is arranged to face the inclined surface.

3. The vehicle electrical equipment cooling structure according to claim 1, characterized in that: The exhaust pipe is arranged on the opposite side of the battery as viewed from the blower in the vehicle width direction.

4. The vehicle electrical equipment cooling structure according to claim 2, characterized in that: The exhaust pipe is arranged on the opposite side of the battery as viewed from the blower in the vehicle width direction.

5. The vehicle electrical equipment cooling structure according to claim 3, characterized in that: The exhaust port is arranged offset from the DC / DC converter in the vehicle width direction.

6. The vehicle electrical equipment cooling structure according to claim 4, characterized in that: The exhaust port is arranged offset from the DC / DC converter in the vehicle width direction.

7. The vehicle electrical equipment cooling structure according to any one of claims 1 to 6, characterized in that: The exhaust port is arranged rearward of the vehicle relative to the DC / DC converter.

8. The vehicle electrical equipment cooling structure according to any one of claims 1 to 6, characterized in that: The cargo box is further provided on the upper portion of the recessed portion, and the exhaust port opens toward a space formed between the recessed portion and the cargo box.

9. The vehicle electrical equipment cooling structure according to any one of claims 1 to 6, characterized in that: A third row of seats is arranged above the blower.

10. The vehicle electrical equipment cooling structure according to any one of claims 1 to 6, characterized in that: The device further comprises: a cover having a storage space for storing the battery, the DC / DC converter, and the blower; and An air intake pipe is provided on the cover to guide the air in the vehicle interior into the receiving space. The exhaust port is exposed to the outside of the cover through the opening of the cover.

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