JPH0512232U - Battery storage box for electric vehicles - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve battery support and heat dissipation in battery storage boxes for electric vehicles. [Structure] A plurality of ridges 14 extending in parallel in the front-rear direction at predetermined intervals are provided on a bottom plate 11a of a battery storage box 8, and a plurality of partition walls 16 extending at right angles to the ridges 14 are provided at predetermined intervals. , Each battery 9 by the ridge 14 and the partition wall 16
The rubber bush 15 is attached to the side surface of the ridge 14 facing the storage position, and the partition 16 is formed of the honeycomb material 19 communicating in the front-rear direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a battery storage box for mounting a power supply battery for an electric vehicle on a vehicle body.

[0002]

[Prior art]

 In an electric vehicle that uses a battery as a driving power source, a large number of batteries must be mounted in order to obtain a large driving force. Therefore, as described in, for example, Japanese Patent Publication No. A large number of batteries are arranged and carried in a storage box and mounted on a vehicle body.

Japanese Utility Model Publication No. 50-32897 discloses a battery storage box integrally formed with a vehicle body frame, and Japanese Utility Model Publication No. 50-52434 discloses a battery storage box body. A plurality of batteries housed in the battery storage box main body by a pressing metal fitting abutting the upper surface of at least two or more of the batteries and a fastener provided on the battery storage metal box main body and engaging with the pressing metal fitting. The battery compartment is shown as it is pressed and secured.

[0004]

[Problems to be solved]

 Since the battery is a heavy object, it should not move unintentionally due to the inertial force generated when the vehicle turns or changes in vehicle speed, and should be able to withstand a large inertial force caused by a sudden turn or vehicle speed change. Must be supported in the storage box.

In addition, since the battery generates heat during charging and discharging, it is necessary to take heat dissipation measures to keep the battery at an appropriate temperature. When multiple batteries are arranged in several rows in the front, rear, left, and right, the temperature of the batteries arranged in the central part tends to rise, and especially when the batteries are connected in series, the deterioration of the performance of the batteries in the central part is Affect.

However, the battery storage container according to the above-mentioned conventional technique does not sufficiently satisfy the demand for supporting and cooling the battery.

[0007]

[Means and Actions for Solving the Problems]

 The present invention has been made in view of the above circumstances. In the present invention, in a battery storage box for an electric vehicle that stores a large number of batteries, at least a predetermined interval is provided on the bottom plate in parallel with each other in the front-rear direction. A plurality of extending ridges are provided, and a plurality of partition walls extending in a direction perpendicular to the ridges are provided at predetermined intervals, the ridges and the partition walls define individual storage positions for each battery, and the ridges are provided. An elastic part piece is additionally provided on the side surface facing the storage position, and the partition wall is made of a honeycomb material communicating in the front-rear direction.

According to the present invention, the batteries are stored in the respective storage positions and are positioned by the ribs and the partition walls that define the storage positions. There is no such thing as a collision.

A space penetrating in the front-rear direction is formed above the protrusion between the rows of the batteries thus positioned in the front-rear direction, and the partition wall crossing the space is formed in the front-rear direction. Since the honeycomb material communicates with the air, air can freely flow from the front end to the rear end in the space. Therefore, the batteries arranged in the center are also cooled by this air and radiate heat sufficiently.

Since the elastic piece is attached to the side surface of the projecting piece which faces the storage position, and the battery is received by the projecting piece through the elastic piece, the lateral inertial force acting on the battery is applied. Is cushioned by this elastic piece. Further, since the front surface and the rear surface of the battery are in contact with the honeycomb material forming the partition wall, the longitudinal inertial force acting on the battery is buffered by the honeycomb material.

[0011]

【Example】

 FIG. 1 is a side view showing an example of an electric vehicle including a battery storage box according to the present invention, and FIG. 2 is a plan view showing the arrangement of the battery storage box in the electric vehicle.

The illustrated electric vehicle 1 is of a light van type, in which a vehicle body 3 is provided on a chassis 2, and a front portion thereof is a driver's cab 4. A motor 5 is attached to and mounted on the chassis 2 at a lower rear portion of the vehicle body 3, and a rear wheel 6 is driven by the motor 5 via a transmission device 7. A battery storage box 8 is attached to and mounted on the chassis 2 at the center of the vehicle body 3 and below the chassis 2, and a large number of batteries 9 are stored as a set in the battery storage box 8. The motor 5 is powered by the battery 9. Electric power is supplied from the battery 9 to the motor 5 via an electric control unit 10 provided in the front part of the vehicle body 3, and the operation of the motor 5 is controlled by operating the unit 10 from the driver's seat. ..

FIG. 3 is a drawing of a front cross section of the battery storage box 8 as viewed rearward (a cross sectional view taken along line III-III in FIG. 4), and FIG. 4 is IV-IV of FIG. It is a horizontal sectional view which follows a line. As can be seen from FIG. 3, the battery storage box 8 comprises a storage box main body 11 and a lid 12 that covers the upper opening of the storage box main body 11, and both are detachably fastened by bolts 13 via flanges that project laterally. Has been done. 5 is a perspective view showing the inside of the storage box main body 11, and FIG. 6 is a perspective view of the lid 12 seen from the back side.

On the inner surface (upper surface) of the bottom plate 11a of the storage box main body 11, a plurality of (four in the illustrated example) ridges 14 are provided so as to extend longitudinally in parallel with each other. The ridges 14 arranged along the left and right edges of the bottom plate 11a have rubber bushes (elastic pieces) 15 on the inner side surface, and on the ridges 14 arranged in the middle, both side surfaces. The distance between the rubber bushes 15 that are attached and face each other is set to be approximately equal to the width of the battery 9.

On the other hand, the inside of the storage box main body 11 is partitioned in the front and back by a plurality of partition walls 16 extending in the left-right direction at right angles to the ridges 14, and the interval between the adjacent partition walls 16 is set equal to the length of the battery 9. Has been done. Although not shown in the figure, a notch for receiving the partition wall 16 is provided in the ridge 14 at a portion where the partition wall 16 and the ridge 14 intersect. As shown in FIG. 7, the partition wall 16 is configured by appropriately partitioning the inside of a metal frame 17 by vertical partition plates 18, and fitting honeycomb members 19 into the respective partitioned spaces. There is. As is well known, the honeycomb material 19 has a large number of honeycomb-shaped holes 19a formed of a thin plate. The axis of these holes 19a extends in the thickness direction of the partition wall 16, that is, in the front-rear direction of the battery storage box 8. Therefore, the front and rear of the partition wall 16 communicate with each other through these holes 19a.

By the ridges 14 and the partition walls 16 assembled as described above, individual storage positions for each battery 9 are defined on the bottom plate 11a of the storage box main body 11, and these storage positions are respectively defined. Battery 9 is stored. The lower portions of the batteries 9 are sandwiched by the rubber bushes 15 from the left and right, the front and rear end surfaces thereof are brought into contact with the honeycomb material 19 of the partition wall 16 to be positioned at the storage position, and are individually held. The partition plate 18 of the partition wall 16 is located between the adjacent left and right batteries 9, 9 as shown in FIGS.

The battery 9 positioned and held on the bottom plate 11 a in this manner is further firmly held by the lid 12. That is, the rear surface (lower surface) of the lid 12 is provided with a ridge 20 corresponding to each ridge 14 on the bottom plate 11a (see FIGS. 3 and 6). When they are fastened, the lower part of the ridge 20 is inserted between the left and right batteries 9, 9. A rubber bush 21 similar to the rubber bush 15 is attached to the lower side surface of each protrusion 20. Therefore, as described above, each battery 9 has its lower portion sandwiched by the ridges 14 via the rubber bush 15 and its upper portion sandwiched by the ridges 20 via the rubber bush 21, so that the batteries 9 are firmly held in the battery storage box 8. To be retained. If the ridges 20 are formed in a wedge-shaped cross-sectional shape as shown in FIG. 3, the wedge action provides stronger retention. A notch 22 that fits into the partition 16 is provided in a portion of the ridge 20 that intersects with the partition 16.

When the lid 12 is attached to the storage box main body 11, a space 23 extending in the front-rear direction is formed between the adjacent ridges 20, 20 above the battery 9 and the terminal 24 of each battery 9 is formed in the space 23. And a wiring cable 25 for connecting the batteries 9 in the front-rear direction is arranged. As can be seen from FIGS. 4 and 6, the protrusion 20 does not extend the back surface of the lid 12 from the front end to the rear end. Therefore, a space portion 23a is formed at the front end portion and the rear end portion of the battery storage box 8 so as to connect the upper side of the battery 9 in the left-right direction. It is arranged in the part 23a and thus all the batteries 9 can be connected eg in series to form a set. The lid 12 is attached to and detached from the storage box body 11 from above with the battery 9 being connected by the wiring cables 25 and 25a.

As can be seen from FIGS. 4 and 5, the front end surface of the frontmost battery 9 (left side in the drawing) arranged in the left-right direction is in contact with the honeycomb material of the partition wall 16 a similar to the partition wall 16. However, the partition wall 16a is separated from the front end wall 11b of the storage box body 11 by the front end spacer 26, and an empty chamber 27 is formed between the partition wall 16a and the front end wall 11b. The rear end portion of the battery storage box 8 is also configured in the same manner, and a similar empty chamber 27a is formed in this portion as well. A space 28 corresponding to the width of the ridges 14 and 20 is formed on the left and right sides of each battery 9, and the space 28 extends longitudinally from the front end to the rear end of the battery group, and As described above, the partition walls 16a, 16 traversing each other have a honeycomb structure in which they communicate with each other in the front-rear direction. Therefore, the front end empty chamber 27 and the rear end empty chamber 27a communicate with each other through the space 28.

Blower ducts 29 are connected to the empty chamber 27 at the front end, and air is blown into the empty chamber 27 from these blow ducts. This air reaches the rear empty chamber 27a through the space 28, and is discharged to the outside from the empty chamber 27a through the exhaust duct 30. Thus, a flow of cooling air that flows back and forth through the battery storage box 8 is generated, and this cooling air cools all the batteries 9 substantially evenly. The air duct 29 may be configured to directly guide the traveling wind from the front of the vehicle. Since the present embodiment is configured as described above, each battery 9 is positioned by the ribs 16 and 20 on the front and rear sides by the partition wall 16 and on the left and right sides by the rubber bushes 15 and 21, and the battery storage box 8 is placed. Each of them is securely fixed in a predetermined storage position inside, does not move or sway unintentionally while the vehicle is running, and even if a large inertial force is generated in the battery 9 due to a sudden turn or a rapid change in vehicle speed, The lateral force is buffered by the rubber bushes 15 and 21, and the longitudinal force is buffered by the honeycomb material 19 of the partition wall 16. Further, since air can freely communicate from the front end to the rear end in the space 28 formed between the rows of the batteries 9 in the front-rear direction, the batteries 9 arranged in the center are also cooled by this air. Heat is sufficiently dissipated, and all the batteries 9 are cooled substantially evenly. Therefore, insufficient cooling of some batteries does not affect the performance of the entire battery group.

[0021]

【The invention's effect】

 According to the present invention, a large number of batteries can be securely fixed to each predetermined position in the storage box, and even if a large inertial force acts on each battery, this can be effectively buffered. In addition, all batteries are cooled almost evenly and sufficiently, which improves power supply performance.

[Brief description of drawings]

FIG. 1 is a side view showing an example of an electric vehicle including a battery storage box according to the present invention.

FIG. 2 is a plan view showing an arrangement of battery storage boxes in the electric vehicle.

FIG. 3 is a cross-sectional view of a front cross section of the battery storage box as viewed rearward.

4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a perspective view showing the inside of a battery storage box.

FIG. 6 is a perspective view of the lid of the battery storage box as viewed from the back side.

FIG. 7 is a perspective view of a partition wall.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Electric vehicle, 2 ... Chassis, 3 ... Car body, 4 ... Driver's cab, 5 ... Motor, 6 ... Rear wheel, 7 ... Transmission device, 8 ... Battery storage box, 9 ... Battery, 10 ... Electric control unit, 11 ...
Storage box body, 12 ... Lid, 13 ... Bolt, 14 ... Projection, 15 ... Rubber bush, 16 ... Partition, 17 ... Frame, 18 ... Partition plate, 19 ... Honeycomb material, 20 ... Projection, 21 ... Rubber bush, 22 ... Notches, 23 ...
Space, 24 ... Terminal, 25 ... Wiring cable, 26 ... Front end spacer, 27 ... Vacancy, 28 ... Space, 29 ... Air duct, 30 ... Exhaust duct.

Claims (1)

[Scope of utility model registration request] 1. A battery storage box for an electric vehicle that stores a large number of batteries, wherein a plurality of ridges extending parallel to each other in the front-rear direction are provided at least at predetermined intervals on a bottom plate, and the ridges are provided at predetermined intervals. Is provided with a plurality of partition walls extending in a right angle direction, the projecting strips and the partition walls define individual storage positions for each battery, and an elastic piece is attached to a side surface of the projecting strips facing the storage position. At the same time, the partition wall is made of a honeycomb material that communicates in the front-rear direction.