JP2515686Y2 - Battery storage box for electric vehicles - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery storage box for mounting a power supply battery for an electric vehicle on a vehicle body.

[0002]

2. Description of the Related 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, it has been disclosed in Japanese Patent Publication No. 62-24287. As described above, a large number of these 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 stored in the battery storage box main body by a pressing metal fitting that abuts the upper surface of at least two or more of the batteries and a fastening tool that is provided in the battery storage metal box main body and engages with the pressing metal fitting. A battery storage box is shown which is adapted to be pressed and fixed.

[0004]

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

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

However, the battery storage container according to the above-mentioned prior art does not sufficiently satisfy the demands for supporting and cooling the battery.

[0007]

The present invention has been made in view of such circumstances, and in the present invention, in a battery storage box for an electric vehicle that stores a large number of batteries, at least on the bottom plate. A plurality of ribs extending in parallel with each other in the front-rear direction are provided at predetermined intervals, and a plurality of partition walls extending in a direction perpendicular to the ribs are provided at predetermined intervals, and the protrusions and the partition walls individually store each battery. An elastic part piece is additionally provided on a side surface that defines a position and faces the storage position of the protrusion, and the partition wall is formed of a honeycomb material that communicates in the front-rear direction.

According to the present invention, the batteries are stored in the respective storage positions and are positioned by the ridges 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 a partition wall crossing the space is formed in the front-rear direction. Since the honeycomb material is in communication with each other, air can freely flow from the front end to the rear end in the space. Therefore, the batteries arranged in the central portion are also cooled by this air and sufficiently radiate heat.

Since the elastic piece is attached to the side surface of the ridge opposed to the storage position, and the battery is received by the ridge through the elastic piece, the lateral inertial force acting on the battery is reduced. It is buffered 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 equipped with a battery storage box according to the present invention, and FIG. 2 is a plan view showing the arrangement of battery storage boxes in the same electric vehicle.

The electric vehicle 1 shown 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. A large number of batteries 9 are stored as a set in the battery storage box 8 and the motor The battery 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 the front cross section of the battery storage box 8 as viewed rearward (transverse cross section taken along line III--III in FIG. 4), and FIG. 4 is taken along line IV--IV in FIG. It is a horizontal sectional view which meets. 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, both of which are bolted via flanges that project laterally.
13 is detachably fastened. Figure 5 shows the storage box body
FIG. 6 is a perspective view showing the inside of the lid 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. A rubber bush (elastic piece) 15 is provided on each of the ridges 14 arranged along the left and right edges of the bottom plate 11a on the inner side surface, and on each of the ridges 14 arranged in the middle on 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,
At the portion where the partition wall 16 and the ridge 14 intersect, the partition wall 16 is attached to the ridge 14.
Is provided with a notch for receiving. The partition 16 is shown in FIG.
As shown in, the inside of the metal frame 17
It is configured by appropriately partitioning by 18 and by fitting a honeycomb material 19 into each partitioned space. Honeycomb material
As is well known, 19 is a large number of honeycomb-shaped holes formed of thin plates.
19a, the axes of these holes 19a are oriented in the thickness direction of the partition wall 16, that is, in the front-back direction of the battery storage box 8, so that the front and rear of the partition wall 16 communicate with each other through these holes 19a. ing.

The projecting ridges 14 and the partition walls 16 assembled as described above define individual storage positions for the respective batteries 9 on the bottom plate 11a of the storage box main body 11, and the battery storage positions are defined at these storage positions. 9 is stored. The lower portion of each battery 9 is sandwiched from the left and right by rubber bushes 15, 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 each battery 9 is individually held. The partition plate 18 of the partition 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 11a in this manner is further firmly held by the lid 12. That is, the bottom plate 11a is provided on the back surface (lower surface) of the lid 12.
A ridge 20 is provided so as to correspond to each of the upper ridges 14 (see FIGS. 3 and 6), and when the lid 12 is fastened to the storage box body 11, the lower part of the ridge 20 is located on the left and right batteries 9 respectively. It is designed to get in between 9 and 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. Retained. Ridge 20
Is formed into a wedge-shaped cross section as shown in FIG.
The wedge action provides a stronger hold. A notch that fits into the partition 16 is provided at a portion of the ridge 20 that intersects with the partition 16.
22 are provided.

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, in the front end portion and the rear end portion of the battery storage box 8, a space portion connecting the upper side of the battery 9 in the left-right direction
Since 23a is formed, the wiring cable 25a that connects the batteries 9 in the left-right direction is disposed in this space portion 23a,
Thus, all the batteries 9 can be connected, for example, in series to form one set. The lid 12 is a storage box main body from above with the battery 9 connected by the wiring cables 25 and 25a.
It is attached to and detached from 11.

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 16a 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 also formed in this portion. A space 28 corresponding to the width between the protrusions 14 and 20 is formed on the left and right sides of each battery 9.
Is formed, and the space 28 extends longitudinally from the front end portion to the rear end portion of the battery group, and the partition walls 16a, 16 crossing the space.
As described above, since it has a honeycomb structure that communicates with the front and rear, 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 vacant chamber 27 at the front end, and air is blown into the vacant chamber 27 from these blast ducts. This air reaches the rear empty chamber 27a through the space 28, and is discharged from the empty chamber 27a to the outside 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 causes all the batteries 9 to flow.
Are cooled almost evenly. The air duct 29 may directly guide the traveling wind from the front of the vehicle. Since the present embodiment is configured as described above, each battery 9 is provided with a rib 16 at the front and rear and a rubber strip 15, 21 at the left and right.
Positioned by 14, 20 and securely fixed to respective predetermined storage positions in the battery storage box 8, they do not move or sway unintentionally while the vehicle is running, and the battery 9 is prevented from turning suddenly or abruptly changing the vehicle speed. Even if a large inertial force is generated in, 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 with each other 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 central portion are sufficiently cooled by the air. The heat is radiated to all the batteries 9, and all the batteries 9 are cooled substantially evenly. Therefore, insufficient performance of some of the batteries does not affect the performance of the entire battery group.

[0021]

According to the present invention, a large number of batteries can be securely fixed to respective predetermined positions in a storage box, and even if a large inertial force acts on each battery, it can be effectively buffered. You can Further, since all the batteries are cooled almost uniformly and sufficiently, the power feeding performance is improved.

[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 the 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.

FIG. 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 seen 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)

(57) [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.