Structure of vehicle battery box

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Technical field to which the invention belongs]

The present invention relates to a vehicle battery box structure, and more particularly to a battery box structure mounted in a vehicle interior.

【0002】

[Conventional technology]

A vehicle such as an electric vehicle or a hybrid vehicle driven by using an engine and an electric motor for traveling together is equipped with a large-scale battery or a large number of batteries in order to supply electric power to the electric motor. In many cases, such a battery is stored in a battery box and mounted under the floor of the vehicle, for example, as disclosed in Japanese Patent Application Laid-Open No. 7-47846.

【0003】

However, when arranging the battery box under the floor, it is necessary to provide a highly waterproof structure because it is necessary to effectively prevent the ingress of water even in a bad environment such as splashing water from the road surface or landing on a vehicle. There is. In addition, since the battery is heavy and exposed to the outside, various reinforcing members are required to have high rigidity, and the battery box itself may interfere with the road surface, especially when driving on a rough road. Is also required to have high rigidity.

【0004】

Therefore, when the battery box is arranged under the floor, there is a concern that the battery box itself, the reinforcing structure, and the like become large, which leads to an increase in the weight of the vehicle and an increase in the manufacturing cost.

【0005】

As a countermeasure for this, there is a case in which a battery box for storing a large number of batteries is arranged under the seat cushion at the rear part of the vehicle interior. By arranging the battery box in the passenger compartment, water splashed from the road surface and inundation caused by the landing of the vehicle are avoided, and interference with the road surface due to rough road driving is avoided to prevent damage to the battery box. be able to. Furthermore, since the air inside the vehicle is air-conditioned and maintained at a relatively stable temperature, the temperature change inside the battery box is suppressed by circulating the air inside the vehicle and the air inside the battery box, resulting in a stable battery. Cooling effect can be obtained.

【0006】

When the battery box is arranged between the floor and the seat cushion in this way, the upper surface of the battery box is covered with the seat cushion, which limits the arrangement positions of the air supply port and the exhaust port of the battery box, while the battery box. The air inside is required to be good and flow all over the battery box. In order to introduce the air in the passenger compartment and allow it to flow all over the battery box, the intake ports with intake fans and the exhaust ports with exhaust fans are arranged facing each other on both the front, rear, left and right sides of the battery box. It is preferable to do so.

【0007】

[Problems to be Solved by the Invention]

However, if an intake port, an exhaust port, and a fan are provided on the side surface of the battery box, a sufficient space is required between the door or the side wall of the vehicle body to ensure smooth air supply and exhaust, and the battery box. The miniaturization of the battery is forced and the mounting volume of the battery is limited. Further, when the air supply port and the exhaust port are provided on the front surface and the rear surface, respectively, it is suitable to provide the intake port or the exhaust port on the front surface because the front is the space under the occupant's feet. When the intake port or the exhaust port is arranged on the rear surface, an open space is provided behind the battery box, or the battery box is projected rearward from the seat cushion to provide the intake port or the exhaust port on the upper surface thereof. It is necessary to open the upper part, which greatly limits the vehicle body design such as the shape of the battery box and the space arrangement in the vehicle interior.

【0008】

Therefore, an object of the present invention made in view of such a point is to provide a vehicle battery box structure in which the shape of the battery box is simplified and compacted, and the degree of freedom in vehicle body design is ensured.

【0009】

[Means for solving problems]

The invention of the vehicle battery box structure according to claim 1 that achieves the above object is a vehicle that is arranged on a vehicle body structural member forming a vehicle interior to store a plurality of batteries and has a seat cushion arranged above. In the battery box for use, a battery box main body for storing a plurality of batteries and a buckle provided on the upper surface of the battery box main body and projecting from the upper surface into the battery box main body to open the upper side and provided at the tip of a seat belt. A seatbelt accommodating portion capable of accommodating and having a recess formed by a plurality of openings, and a fan arranged in the battery box main body and ventilating the inside of the battery box main body through the openings. The seat belt has a base end fixed to the vehicle body member and one of a plurality of openings bored in the seat belt storage portion is inserted, and the tip extends from the opening into the vehicle interior. It is characterized by.

【0010】

According to the invention of claim 1, a seat belt storage portion having recesses protruding into the battery box body is provided on the upper surface of the battery box body, and a plurality of openings are provided in the recesses, and a fan is provided through these openings. Since the inside of the battery box is configured to be ventilated, a space for releasing air inside the battery box body by the fan or ensuring suction efficiency by the fan is secured by the recess of the seat belt storage part whose upper part is open. , Simplification and compactness of the battery box shape by providing a space for ventilation behind the conventional battery box body and by projecting the battery box to the rear for ventilation to open the upper surface. At the same time, the restraint of the vehicle body design by the battery box is avoided or greatly reduced, and the degree of freedom in the vehicle body design is greatly improved.

【0011】

The invention according to claim 2 is the substrate in the vehicle battery box structure according to claim 1, further located below the seatbelt accommodating portion and having an inclined surface that is inclined with respect to a horizontal plane and an air outlet is opened. The fan is an axial flow fan, and is characterized in that it is arranged on the lower surface side of the inclined surface in a blowing direction substantially orthogonal to the inclined surface.

【0012】

According to the invention of claim 2, by arranging the axial flow fan on the inclined surface where the air outlet of the substrate opens so that the blowing direction thereof is substantially orthogonal to the inclined surface, the fan is inclined along the inclined surface. It is installed and arranged so that the height of the fan in the vertical direction is suppressed so that the battery box can be made compact, and the ventilation resistance due to the air outlet can be reduced to improve the ventilation efficiency of the fan.

【0013】

The invention according to claim 3 is characterized in that, in the vehicle battery box structure according to claim 1 or 2, a plate-shaped member extending in a substantially horizontal direction is provided below the fan.

【0014】

According to the invention of claim 3, by arranging the plate member extending horizontally below the fan, it is rectified by the substrate and the plate member to improve the ventilation efficiency by the fan, and at the same time, the opening of the seatbelt storage portion is tentatively opened. Even if a foreign substance such as a coin falls from a part or the like, it is received by the plate member and can be effectively prevented from falling onto a control device or the like arranged below.

【0015】

According to the invention of claim 4, the vehicle battery box structure of claim 2 or 3 is characterized in that the seatbelt accommodating portion and the substrate are integrally formed.

【0016】

According to the invention of claim 4, by integrally forming the seatbelt accommodating portion and the substrate, it is possible to reduce the number of components and simplify the configuration, and to make it more compact.

【0017】

According to the invention of claim 5, in the vehicle battery box structure according to any one of claims 1 to 4, the battery box body is substantially rectangular in plan view, and the inside of the battery box body is the battery box body. A first battery storage chamber having suction ports open at both ends of the front surface over the entire width of the front portion, a device storage chamber located in the center of the rear portion of the battery box main body, and suction ports opened on each side surface of the battery box main body. The second battery storage chamber and the third battery storage chamber extending along the rear surface on both sides of the device storage chamber are partitioned by a partition wall, and the rear end of the first battery storage chamber and the device storage chamber, the above. The inner end of the second battery storage chamber and the device storage chamber, and the inner end of the third battery storage chamber and the device storage chamber are communicated with each other by vents formed in the partition wall, and the fan is connected to the device storage chamber. It is characterized by being placed in.

【0018】

According to the invention of claim 5, the inside of the battery box body is divided into the first, second, and third battery storage chambers and the device storage chamber in the rear central portion by a partition wall, and the first, second, and third batteries are each divided. By communicating the storage chamber and the device storage chamber and arranging a fan in the device storage chamber, the inside of the battery box main body can be efficiently and uniformly ventilated.

【0019】

The invention according to claim 6 is the vehicle battery box structure according to any one of claims 1 to 5, further, the projected area below the battery box body is smaller than that of the battery box body, and the upper part is the battery box body. An open lower battery box is disposed at the bottom, and the upper portion of the lower battery box is partitioned by a removable lower battery box partition wall having a plurality of vents communicating with the battery box body. To do.

【0020】

According to the invention of claim 6, by disposing the lower battery box below the battery box body, the battery box body can be made compact especially in a plan view state, and the space between the outer periphery of the battery box body and the vehicle body member can be increased. It can be easily secured and ventilation inside the battery box body becomes easy, and the air inside the battery box body can be blown into the lower battery box.

【0021】

According to a seventh aspect of the present invention, in the vehicle battery box structure of the sixth aspect, the battery box body is arranged at a substantially central portion in the vehicle width direction of the vehicle, and the lower battery box is located in the vehicle width direction. It is characterized in that it is unevenly distributed on one side and a spare tire accommodating portion is provided below the main body of the other battery box.

【0022】

According to the invention of claim 7, the spare tire accommodating portion can be easily secured by being unevenly distributed below the battery box body and on the side opposite to the uneven distribution side of the lower battery box, and the imbalance of weight on the left and right sides of the vehicle body is reduced. be able to.

【0023】

BEST MODE FOR CARRYING OUT THE INVENTION

An embodiment of the vehicle battery box structure of the present invention will be described with reference to FIGS. 1 to 8 by taking a wagon type electric vehicle as an example. The arrow Ft in the figure indicates the front of the vehicle body.

【0024】

FIG. 1 is a side view showing an outline of the electric vehicle 1, in which a vehicle body structural member formed in the passenger compartment 2, for example, a floor 3 has a low-floor center floor 4 and a step portion 4a behind the center floor 4. The rear floor 5 is continuous with the rear floor 5, and the battery box 10 is mounted on the center floor 4 at the center in the vehicle width direction along the front end of the rear floor 5 as shown by diagonal lines. The seat cushion 6a of the rear seat 6 is placed above the battery box 10, and the backrest 6b supported by a hinge (not shown) fixed to the seat cushion 6a is placed behind the seat cushion 6a, and the center floor. battery box on 4 passenger footwell a is formed between the scan 10 and the front sheet 7.

【0025】

As shown in the exploded perspective view in FIG. 2 and the plan view in FIG. 3, the battery box 10 extends rearward as the central portion extends substantially in the vehicle width direction and the both end portions move outward. A substantially rectangular bottom surface 12 having a front edge 12a, a trailing edge 12b extending in the vehicle width direction, and left and right side edges 12c and 12d extending in the front-rear direction, and standing along the front edge 12a of the bottom surface 12. The central portion 13a extends in the vehicle width direction, and both side end portions 13b and 13c are erected along the front edge 13 and the trailing edge 12b of the bottom surface 12 in the vehicle width direction as they move backward as they move outward. The extending rear surface 14 and the side surface that stands along the left and right side edges 12c and 12d of the bottom surface 12 and extends in the front-rear direction, and the front end and the rear end are connected to the side ends of the front surface 13 and the rear surface 14, respectively. It has a box-shaped battery box body 11 with 15 and 16 open above. Further, one side of the bottom surface 12 of the battery box main body 11, in the present embodiment, the lower battery box 17 having a box shape that is biased to the left side and the upper side is open to the bottom surface 12 and has a smaller projected area than the battery box main body 11 is downward. It is formed so as to protrude.

【0026】

Inside the battery box body 11, a plurality of support frames 18 for mounting and supporting the battery B are detachably provided while extending in the front-rear direction along the bottom surface 12 to reinforce the battery box body 11. ..

【0027】

Further, in the battery box main body 11, one end of the first and second lateral partition walls 21, 22 and the first and second lateral partition walls 21, 22 extending in the vehicle width direction are joined to the side surfaces 15 and 16, respectively. The first and second vertical bulkheads 23 and 24 extending rearward from each inner end, and the first and second vertical bulkheads 23 and 24 erected between the rear ends of the first and second vertical bulkheads 23 and 24 and extending in the vehicle width direction. The third and fourth vertical partition walls 26 and 27 are partitioned in the front-rear direction by the horizontal partition wall 25 of 3, and further extend in the front-rear direction between the left and right ends of the third horizontal partition wall 25 and the rear surface 14, respectively. It is erected and each of these bulkheads is removable.

【0028】

The battery box body 11 is provided by the first, second, and third horizontal bulkheads 21, 22, 25, the first and second vertical bulkheads 23, 24, the left and right side surfaces 15, 16 and the front surface 13 arranged in this way. A first battery containment chamber I is partitioned over the entire width of the front part of the battery. Further, the second battery storage chamber II is partitioned by the first horizontal partition wall 21, the first and third vertical partition walls 23 and 26, the right side surface 15 and the rear surface 14. Similarly, the second horizontal partition wall 22, the second and fourth vertical partition walls 24, 27, the left side surface 16 and the rear surface 14 form a third battery storage chamber III, and the third horizontal partition wall 25, the third. The device storage chamber IV is formed by the vertical partition wall 26, the fourth vertical partition wall 27, and the rear surface 14.

【0029】

Vents 25a and 25b that communicate the rear end of the first battery storage chamber I and the device storage chamber IV are opened in the third horizontal partition wall 25, and the first battery storage chamber I and the first battery storage chamber I and the second are opened in the second vertical partition wall 24. The vent 24a communicating with the battery storage chamber III of 3 is opened, and the vent 26a communicating with the inner end of the second battery storage chamber II and the device storage chamber IV is opened in the third vertical partition wall 26. A vent 27a that communicates the inner end of the third battery storage chamber III with the device storage chamber IV is opened in the vertical partition wall 27 of 4. Note that FIG. 2 shows a state in which the second lateral partition wall 22 is removed.

【0030】

Then, two batteries B are carried in and stored in the lower battery box 17 from the upper part of the lower battery box 17 that opens to the bottom surface 12 as shown by a broken line in FIG. 3, and are covered by the lower battery box partition wall 28 described later. .. Similarly, in the first battery storage chamber I, ten batteries B are gapped with each other in a state in which space portions Ia and Ib having a substantially planar triangular shape are formed between the side ends 13b and 13c of the front surface 13. Is stored with.

【0031】

Three batteries B are stored in the second battery storage chamber II, and three batteries B are stored in the third battery storage chamber III. Each battery B stored in each of the first, second, and third battery storage chambers I, II, and III includes the battery box main body 11 and the first, second, and third lateral bulkheads 21, 22, 25, etc. It is held by a holding stay 29 or the like erected between the two.

【0032】

Intake ports 13d and 13e are opened at both side ends 13b and 13c of the front surface 13, respectively, and intake ports 15d and 15e are opened on the left side surface 15 corresponding to the first battery storage chamber I and the second battery storage chamber II, respectively. Similarly, the intake ports 16d and 16e are opened on the side surface 16 corresponding to the first battery storage chamber I and the third storage chamber III.

【0033】

The side ends 13b and 13c of the front surface 13 project into the spaces Ia and Ib formed between the side ends 13b and 13c and the battery B stored in the first battery storage chamber I corresponding to the intake ports 13d and 13e, respectively. As shown in FIG. 4, intake fans 13f and 13g are installed, and the intake fans 13f and 13g are arranged so as to blow air toward the upper center of the first battery storage chamber I, for example. It is composed of an axial flow fan.

【0034】

Intake fans 15f and 16f such as a relatively flat axial flow fan as shown in the perspective view are attached to the intake ports 15e and 16e on the side surfaces 15 and 16, respectively.

【0035】

A control device (not shown) such as a motor controller is housed in the device storage chamber IV, and an exhaust device 41 as shown in FIGS. 2 and 3 is housed above the control device. As shown in the exploded perspective view showing the main part of FIG. 2 in FIG. 6, the exhaust device 41 has a substantially horizontal and rectangular horizontal plane 43 in which the front end is attached to the rear surface of the third horizontal partition wall 25, and the horizontal plane 43. It has a substantially rectangular and concave substrate 42 in a plan view in which inclined surfaces 44 and 45 are inclined so as to gradually rise from both end edges as they move outward in the vehicle width direction, and the trailing edge of the substrate 42 is It is fitted and mounted on the recess 14a recessed in the center of the upper edge of the rear surface 14.

【0036】

A plurality of slit-shaped air vents 44a and 45a are bored in each of the inclined surfaces 44 and 45 of the substrate 42, and a fan for ventilation corresponding to the air vents 44a and 45a is formed on the lower surface of each inclined surface 44 and 45. In the present embodiment, discharge fans 46 and 47 such as a relatively flat axial flow fan are attached, and the vertical dimensions of the exhaust device 41 can be suppressed by arranging the flat discharge fans 46 at an angle. In addition, the ventilation directions of the discharge fans 46 and 47 are set to be substantially orthogonal to the inclined surfaces 44 and 45.

【0037】

Further, plate-shaped members 48 and 49 extending substantially horizontally below the discharge fans 46 and 47 and having their tips bent upward are provided, and the above-mentioned corresponding to the space between the inclined surface 44 and the plate member 48. Vents 25a bored in the third horizontal partition wall 25 and vents 26a bored in the third vertical partition wall 26 are opened respectively, and similarly, correspondingly between the inclined surface 45 and the plate member 49, the third vent is opened. The vent 25b drilled in the horizontal partition wall 25 of 3 and the vent 27a drilled in the fourth vertical partition wall 27 are open respectively.

【0038】

The open upper part of the battery box main body 11 in which the battery B and the exhaust device 41 and the like are housed is shown in FIG. 7 as a perspective view of a partially broken part, and in FIG. 8 as a sectional view taken along line AA in FIG. A plate-shaped upper lid 50 is covered with a gap between the battery B and the upper lid 50, and the seat cushion 6a of the rear seat 6 is arranged on the upper lid 50. The trailing edge of the top lid 50 is supported by a bracket 51 extending in the vehicle width direction along the front edge of the rear floor 5.

【0039】

The upper lid 50 or the bracket 51 forming the upper surface of the battery box body 11, and in the present embodiment, the mounting port 51a opens in the center of the bracket 51 facing the substrate 42 of the discharging device 41, and the seat is opened in the mounting port 51a. A seatbelt accommodating portion 52 for accommodating the buckle 57 attached to the tip of the belt 56 is fitted and attached. The seatbelt storage portion 52 has a pair of box-shaped recesses 53 arranged side by side on the left and right with an open upper part, and a flange portion 54 formed along the upper edge of the recess 53, and is upward to the mounting port 51a. The recess 53 is fitted into the bracket 51 so as to be accommodated in the concave substrate 42. Openings 55 are opened at the bottom, sides and rear of each recess 53 protruding from the bracket 51 into the battery box body 11, and in particular, the rear opening 54 is formed in a shape that allows the seat belt 56 to be inserted. ..

【0040】

As shown in FIG. 8, the seatbelt 56 is fixed to a vehicle body structural member such as a cross member 8 whose base end 56a extends along the front end of the rear floor 5 in the vehicle width direction by a seatbelt anchor 58. An opening 55 that opens into the recess 53 of the storage portion 52 is inserted and guided into the passenger compartment 2 from the rear of the seat cushion 6a to extend, and when not in use, together with the buckle 57, into the recess 53 of the seat belt storage portion 52. It is stored.

【0041】

Further, as shown in FIG. 7, a vent (not shown) for introducing the air in the battery box main body 11 into the lower battery box 17 is opened in the lower battery box partition wall 28 that covers the upper part of the lower battery box 17. At the same time, the intake fan 28f is attached, and a vent 28a communicating with the device storage chamber IV is opened at the rear of the lower battery box partition wall 28, and this vent 28a is connected to the battery B in the lower battery box 17. The cable connecting the battery B in the battery box body 11 is inserted. By sharing the vent 28a as an insertion port for harnesses connecting the inside of the battery box main body 11 and the inside of the lower battery box 17, the configuration can be simplified.

【0042】

Further, as shown by the broken line T in FIG. 3, the recess formed by the battery box body 11 and the lower battery box 17 is unevenly distributed below the battery box 11 and opposite to the uneven distribution side of the lower battery box 17, that is, on the left side. Spare tires are housed. By accommodating the spare tire T in the recess formed by the battery box body 11 and the lower battery box 17 which are unevenly distributed on the opposite side of the lower battery box 17, the space for mounting the spare tire T can be easily secured. It is possible to reduce the imbalance of the left and right weight of the vehicle body.

【0043】

Next, the operation of the battery box 10 configured in this way will be described.

【0044】

For example, when the temperature of the battery B in the battery box 10 reaches a set value while driving or charging, the side ends 13b, 13c, side surfaces 15, 16 and the lower battery box partition wall 28 of the front surface 13 of the battery box body 11 The intake fans 13f, 13g, 15f, 16f and 28f respectively arranged are operated, and the discharge fans 46 and 47 arranged in the discharge device 41 are operated.

【0045】

By operating the intake fans 13f and 13g arranged on the front surface 13, the air in the air-conditioned cabin 2 of the foot space A formed between the front seat 7 and the battery box 10 can be smoothly air-conditioned. Introduced into the spaces Ia and Ib formed by the batteries B and the side ends 13b and 13c of the front surface 13 on both front sides of the first battery compartment I from 13e, and by the intake fans 13f and 13g. The air is blown toward the upper center of the first battery storage chamber I.

【0046】

The air blown from both intake fans 13f and 13g arranged diagonally upward is arranged opposite to the intake fans 13f and 13g because the distance between the intake fans 13f and 13g and the battery B is relatively secured. It is effectively sent between the upper surface of each battery B and the upper lid 50 without being affected by the side surface of the battery B, etc., flows along the lower surface of the upper lid 50, and with the battery B in the first battery storage chamber I. The hot air that stays between the upper lid 50 and the upper lid 50 is guided backward. The air containing hot air blown to the rear of the first battery storage chamber I is stored in the exhaust device through the vents 25a and 25b opened in the third lateral partition wall 25 by the exhaust fans 46 and 47 of the exhaust device 41. The air vents 44a, 45a and the seatbelt storage section 52 are sucked into the chamber IV to ventilate the inside of the first battery storage chamber I, and are bored in the inclined surfaces 44, 45 of the substrate 42 by the exhaust fans 46, 47. It is discharged into the room 2 through the opening 55 that opens into the recess 53 of the.

【0047】

When the air is discharged from the rear part in the first battery storage chamber I by the exhaust device 41, the exhaust from the vent 25a of the third lateral partition wall 25 is mainly guided by the inclined surface 44 and the plate member 48 to be discharged. It is sucked with good suction efficiency by the fan 46, and is effectively discharged above the substrate 41 from the air outlet 44a along a direction substantially orthogonal to the inclined surface 44 by the exhaust fan 46. Similarly, the exhaust from the vent 25b is mainly guided by the inclined surface 45 and the plate member 49, and is discharged from the air vent 45a of the inclined surface 45 above the substrate 41 by the exhaust fan 47, so that the passenger compartment 2 is efficiently exhausted. The air inside can be introduced into the first battery storage chamber 1 and the battery B can be effectively cooled by ventilation in the first battery storage chamber I.

【0048】

Further, by the air flow flowing in the first battery storage chamber I, the air in the passenger compartment 2 is supplied into the first battery storage chamber I from the front side thereof from the intake ports 15d and 16d of the side surfaces 15 and 16. As a result, ventilation in the first battery storage chamber I and cooling of each battery B are made uniform and efficient.

【0049】

By the operation of the intake fan 15f arranged on the side surface 15, the air in the passenger compartment 2 is introduced from the side into the second battery storage chamber II from the intake port 15e, and is blown inward. The air containing hot air blown to the inside of the second battery storage chamber II is sucked into the device storage chamber IV from the vent 26a opened in the third vertical partition wall 26 by the exhaust fan 46 of the exhaust device 41. The room is provided through an opening 55 that is mainly guided by the inclined surface 44 and the plate member 48 and is bored in the inclined surface 44 of the substrate 42 by the exhaust fan 46 and is opened in the recess 53 of the seat belt storage portion 52. Released to 2. Similarly, the air in the passenger compartment 2 is introduced into the second battery storage chamber II from the intake port 15e by the intake fan 16f provided on the side surface 16, and the hot air blown into the inside of the third battery storage chamber III. The air containing the air is sucked into the device storage chamber IV from the vent 27a of the fourth vertical partition wall 27 by the exhaust fan 47 of the exhaust device 41, and is mainly guided by the inclined surface 45 and the plate member 49 by the exhaust fan 47. The air is discharged into the room 2 through the opening 45a formed in the inclined surface 45 and the opening 55 opening in the recess 53 of the seatbelt accommodating portion 52. The volumes of the second and third battery storage chambers II and III are smaller than those of the first battery storage chamber I, and the number of stored batteries B is small, so that the amount of air blown for ventilation and cooling is small. Therefore, the intake fans 15f and 16f can use relatively small output intake fans, and the space between the side surfaces 15 and 16 and each vehicle body side member and the respective batteries B facing the intake fans 15f and 16f. The space between each space is also set relatively small.

【0050】

Further, the air in the first battery storage chamber I is introduced into the lower battery box 17 from the vent opened in the lower battery box partition 28 by the action of the intake fan 28f arranged in the lower battery box partition 28. In addition, air is blown rearward along the lower surface of the lower battery box partition wall 28 to ventilate the inside of the lower battery box 17. The air containing hot air blown along the lower surface of the lower battery box partition wall 28 is sucked into the device storage chamber IV from the vent 28a opened in the lower battery box partition wall 28 by the exhaust fans 47 and 48 of the exhaust device 41. Then, through between the fourth vertical partition wall 27 and the tip of the plate member 49 and between the third vertical partition wall 26 and the tip of the plate member 48, the exhaust fans 46 and 47 are bored in the inclined surface 44 of the substrate 42. It is discharged into the room 2 through the blower port 44a and the opening 55 of the seatbelt storage part 52. A part of the air in the first battery box III is discharged into the lower battery box 17 from the suction port of the partition wall 28 for the lower battery box with the ventilation in the lower battery box 17, and the first battery storage chamber I It brings about an improvement in ventilation and cooling efficiency inside.

【0051】

The wind speed of the air blown above the substrate 42 by the discharge fan 47 is sufficiently lowered when passing through the opening 55 of the seatbelt storage portion 52, and is not directly blown to the passengers, and is not directly blown to the passengers. Avoided from causing discomfort. Further, even if a foreign substance such as a coin falls into the device storage chamber IV from the opening 55 of the seatbelt storage portion 52, for example, the coin or the like is received by the plate members 48 and 49, and the control device is arranged below. It is prevented from falling up.

【0052】

If air is simply sucked in by the suction fans provided near both ends of the front surface of the battery box 11 and discharged from the center of the rear portion, the air stays at both ends of the rear portion. By forming the second and third battery storage chambers II and III in which both ends of the rear portion are partitioned to suck and blow the air in the passenger compartment 2, the cooling of the portion is obtained and the entire inside of the battery box main body 11 is covered. It can be ventilated uniformly and efficiently.

【0053】

According to the present embodiment configured in this way, the exhaust device 41 arranged in the device storage chamber IV is provided with inclined surfaces on both end edges of a horizontal plane 43 having front ends attached to the rear surface of the third lateral partition wall 25. The relatively flat exhaust fans 46, 47 are placed on the inclined surfaces 44, 45 through which the air outlets 44a, 45a of the concave mounting board 42 extending 44, 45 are opened, following the lower surfaces of the inclined surfaces 44, 45. The vertical dimension of the exhaust device 41 is suppressed by providing the exhaust device 41 at an angle. Further, the seatbelt accommodating portion 52 is arranged so as to fit in the concave shape formed on the substrate 42, and the seatbelt accommodating portion 52 is discharged into the passenger compartment 2 from the opening 55 opened in the recess 53 of the seatbelt accommodating portion 52. By doing so, the height dimension of the battery box main body 11 is suppressed. Further, a space portion whose upper portion is open is secured by the seatbelt storage portion 52, and a space for exhaust is formed behind the battery box 10, or the battery box 10 is projected rearward for exhaust. It is not necessary to open the battery box 10 to the upper surface, and the battery box 10 can be made compact. At the same time, the restraint of the vehicle body design by the battery box is avoided or reduced, and the degree of freedom in the vehicle body design is greatly improved.

【0054】

Further, the distance between the intake fans 13f and 13g arranged on the front surface 12 as described above and the battery B is relatively secured, and the air blown from the intake fans 13f and 13g is not affected by the side surface of the battery B and the like. Each vent that is effectively sent between the upper surface of each battery B and the upper lid 50, flows along the lower surface of the upper lid 50, and is opened to the third transverse partition 25 by the exhaust fans 46, 47 in the apparatus storage chamber IV. Since the inside of the first battery storage chamber I is efficiently ventilated and cooled because it is sucked through 25a and 25b, the gap between the battery B and the upper lid 50 can be set to be small, and the height of the battery box body 11 is high. Can be suppressed.

【0055】

Further, by arranging the lower battery box 17 in multiple layers on the lower surface of the battery box main body 11, the battery box main body 11 can be made compact in a plan view state, and in the mounting space in the passenger compartment 2 in which the front-rear and left-right directions are restricted. The space can be secured in front of and to the left and right of the battery box body 11, and the efficiency of air intake from the passenger compartment 2 is ensured.

【0056】

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, the seatbelt storage portion 52 is fitted and supported in the mounting port 51a formed in the bracket 51 that supports the trailing edge of the upper lid 50, but the seatbelt storage portion 52 is supported by the upper lid 50. It is also possible to integrally form the seatbelt accommodating portion 52 on the substrate 42 of the discharge device 41 formed in a concave shape.

【0057】

Further, in the above embodiment, intake ports 13d, 13e, 15d, 15e, 16d, 16e are formed at the side ends 13b, 13c, side surfaces 15 and 16 of the front surface 13 of the box body 11, respectively, and the intake fans 13f, 13g, 15f, 16f, 28f were arranged, and the exhaust device 41 was arranged in the center of the rear part of the box body 11, but an intake device was provided instead of the exhaust device 41, and each intake fan intake fan 13f, 13g, 15f, 16f. By providing a discharge fan instead of 28f, the air in the passenger compartment 2 is taken into the battery box 10 from the opening 55 of the seat belt storage 52, and from each intake port 13d, 13e, 15d, 15e, 16d, 16e. It is also possible to discharge the air in the battery box 10 into the passenger compartment 2, in which case each intake port serves as an exhaust port.

【0058】

[Effect of the invention]

According to the invention of the vehicle battery box structure of the present invention described above, a seatbelt storage portion having a recess protruding into the battery box body is provided on the upper surface of the battery box body, and a plurality of openings formed in the recess are provided. Since the inside of the battery box is ventilated by the fan through the fan, the recess of the seatbelt storage portion secures a space for releasing air in the battery box body by the fan or ensuring suction efficiency by the fan. It is not necessary to provide a space for ventilation behind the conventional battery box body or to project the battery box body rearward for ventilation to open the upper surface, and the battery box can be made compact. , The restraint of the vehicle body design by the battery box is avoided or greatly reduced, and the degree of freedom of the vehicle body design is greatly improved.

[Simple explanation of drawings]

[Figure 1]

It is a side view which shows the outline of the electric vehicle explaining embodiment of the battery box structure for a vehicle by this invention.

[Figure 2]

Similarly, it is an exploded perspective view of the battery box.

[Fig. 3]

Similarly, it is a plan view of the battery box.

[Fig. 4]

Similarly, it is a perspective view which shows the outline of the intake fan.

[Fig. 5]

Similarly, it is a perspective view which shows the outline of the intake fan.

[Fig. 6]

Similarly, it is an exploded perspective view which shows the main part of FIG.

[Fig. 7]

Similarly, it is a perspective view of a partially broken part.

[Fig. 8]

Similarly, it is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

2 Car room 3 floors (body structural members) 4 Center floor 5 Rear floor 6 Rear seat 6a seat cushion 10 Battery box 11 Battery box body 12 bottom 13 Front 13a central part 13b, 13c side end 14 Rear 14a recess 15, 16 sides 13d, 13e, 15d, 15e, 16d, 16e air intake 13f, 13g, 15f, 16f, 28f intake fan 17 Lower battery box 21 First horizontal bulkhead (bulkhead) 22 Second lateral bulkhead (bulkhead) 23 First vertical bulkhead (bulkhead) 24 Second vertical bulkhead (bulkhead) 25 Third lateral bulkhead (bulkhead) 26 Third vertical bulkhead (bulkhead) 27 Fourth vertical bulkhead (bulkhead) 28 Lower battery box lid 24a, 25a, 26a, 27a, 28a vents 41 Exhaust system 42 board 43 Horizontal plane 44, 45 slope 44a, 45a air outlet 46, 47 Discharge fan (fan) 48, 49 Plate-shaped member 50 Top lid 51 bracket 51a mounting port 52 Seat belt compartment 53 Recess 55 opening 56 Seat belt 56a base end 57 buckle I 1st battery compartment Ia, Ib Space II Second battery compartment III Third battery compartment IV equipment storage room