JPH11115505A - Battery box device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently store many batteries in the inside of a battery box, and devise so as to suppress as low as possible also a height of the battery box, and ensure strength rigidity of the battery box, in a vehicle provided with the battery box storing the many batteries and an electric motor for running the vehicle driven with this battery serving as a power source. SOLUTION: A frame 21 partitioning inside a battery box 20 into upper/lower two steps is constructed, and in these partitioned spaces, respectively a plurality of batteries 4 are arranged in a horizontally laid condition. In a lower surface of the frame 21, a fixing bracket 23 to a car body side and a pawl guiding bracket 24 of a forklift are connected. Between upper/lower steps of the frame 21, a reinforcing member 34 is provided, which connects a central part of a pair of front/rear vertical beam members in a lower step side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery box device for a vehicle having an electric motor for driving the vehicle.

[0002]

2. Description of the Related Art Conventionally, a hybrid electric vehicle in which an engine and an electric motor are combined to improve exhaust emission has been known.

[0003] Such a hybrid electric vehicle includes a generator driven by an engine, and a battery for storing the generated power, and travels by using these as a power source and driving an electric motor via an inverter.

[0004]

In such a vehicle, especially in the case of a large vehicle, a large space is required for storing these batteries because a large number of batteries are used.
Also, from the viewpoint of vehicle mountability and maintainability, it is desired that these batteries be stored together in one place inside the vehicle body instead of being dispersed. As a conventional example, there is one in which a plurality of batteries are installed in a container or a stand. However, since the installation of the batteries is a planar arrangement, none is suitable for use in a large vehicle having a large number of batteries ( JP-A-5-159755 and JP-A-7-172190).

An object of the present invention is to provide a battery box device in which a large number of batteries can be installed efficiently.

[0006]

According to a first aspect of the present invention, in a vehicle provided with a battery box for accommodating a large number of batteries and an electric motor for driving the vehicle driven by these batteries, the inside of the battery box is vertically moved. A framework for partitioning into stages is constructed, and a plurality of batteries are arranged in these partition spaces.

In the second invention, in a vehicle provided with a battery box for accommodating a large number of batteries and a motor for driving the vehicle driven by the power source, a framework for partitioning the inside of the battery box into two upper and lower sections is constructed. Then, a plurality of batteries are arranged in these compartments in a state of being laid sideways.

According to a third aspect of the present invention, as the skeleton building element in the first or second aspect, four pillar members having two upper and lower support surfaces are connected to the front and rear pillar members on the same support surface. A pair of left and right horizontal beam members and a pair of front and rear vertical beam members that similarly connect the left and right column members are provided.

In a fourth aspect, a bracket for fixing to the vehicle body and a bracket for guiding a pawl of a forklift are connected to the lower surface of the skeleton according to the third aspect.

According to a fifth aspect of the present invention, a reinforcing member is provided between the upper and lower skeletons of the third aspect for connecting the central portions of a pair of front and rear longitudinal beam members on the lower side.

According to a sixth aspect of the present invention, in any one of the third to fifth aspects, the skeleton is divided into two sets of a front part and a rear part as independent constructs, and these constructs are divided. It is joined back and forth by longitudinal beam members before and after each other.

[0012]

According to the first aspect of the present invention, a large number of batteries can be efficiently stored inside the battery box via the frame which divides the battery box into two upper and lower sections. In addition, the construction of the framework makes it possible to secure the strength and rigidity required for the battery box while minimizing the weight increase of the battery box.

In the second invention, the height of the battery box can be kept low since the battery is installed lying down.

[0014] In the third invention, a rectangular frame is formed on the supporting surfaces of the four pillar members by the vertical beam member and the horizontal beam member, respectively.
Formed in steps. Therefore, a large number of batteries can be efficiently stored inside the battery box via the upper and lower rectangular frames. In addition, the number of building elements is minimized, which is advantageous in terms of cost.

According to the fourth aspect of the invention, the bracket for fixing to the vehicle body and the bracket for guiding the pawl of the forklift can obtain the effect of reinforcing the frame while securing their original functions.

In the fifth aspect, the strength and rigidity of the central portion between the upper and lower rectangular frames can be improved by the reinforcing member.

In the sixth aspect of the present invention, high strength and rigidity of the frame can be ensured by connecting the two independent structures back and forth.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a power room provided at the rear of a vehicle such as a bus.
A generator 3 driven by the engine 2, a battery 4 for storing electric power generated by the generator 3, and traveling motors 5 and 6 driven by the generator 3 and the battery 4 via an inverter 7 and the like Will be installed.

The power chamber 1 has a vehicle body panel (roof panel, side panel,
Back panel), and the front is separated by a partition from the passenger compartment. An opening / closing door for inspection and maintenance for partially opening the power room 1 to the outside is provided on the rear body panel.

Inside the power room 1, the engine 2 is mounted horizontally below the left side of the power room 1 (left side of the vehicle), and the generator 3 is connected to the engine 2. 9 is an air cleaner. The electric motors 5 and 6 are mounted on the lower side of the power room 1 on the right side of the drawing (right side of the vehicle), and the driving force is transmitted to the drive wheels from the drive shaft and the differential device via the reduction gear 10.

The inverter 7 is housed in a middle inverter room 11 on the right side of the power room 1 (right side of the vehicle) in FIG.
Is stored in the battery room 12 above the inverter room 11. Air compressor 13, air conditioner unit 14, between inverter room 11 and generator 3 and motors 5 and 6.
A radiator unit and accessories are provided.

A heat shield 15 is provided between the engine 2 and the generator 3.
Is interposed. The heat shield plate 15 is formed so as to partition the generator 3 from the engine room 16 between the front surface and the rear surface of the power room 1.
The battery chamber 12 also extends to the upper part (uppermost stage) of the power chamber 1 so as to partition.

The battery 4 is provided with a battery box 20 in which a number of batteries 4 are housed. 2 to 5, the battery box 20 includes a frame 21 (frame) having a box frame shape and a cover 22. A frame bracket 23 for fixing to a vehicle body side is provided on a lower surface of the frame 21, and a forklift pawl guide. 24 and connector boxes 25a and 25b.

The frames 21 are independent constructs 2
1a and 21b are connected back and forth. Each of the constructs 21a and 21b is composed of four column members 26 having two upper and lower support surfaces 26a and 26b, and a pair of right and left cross beam members 27 connecting the front and rear column members 26 on the respective support surfaces 26a and 26b.
And a pair of front and rear vertical beam members 28 connecting the left and right column members 26 (see FIG. 5).

These beam members 27 and 28 are four pillar members 26
On the same supporting surfaces 26a, 26b (6 in this example).
Rectangular frame 2 in which one battery 4 can be installed in one row in the vertical direction.
9 (battery installation surface) is formed in two upper and lower stages (see FIGS. 2 and 3). Spacers 30 for positioning the battery 4 are arranged on a pair of longitudinal beams 28 before and after each stage.

The battery 4 is divided into two groups, left and right, for convenience of wiring.
To the left, and the right one is the battery terminal 4
A is placed between the spacers 30 in a state of being laid sideways so that a faces rightward. For each group, the battery 4 is connected to the rectangular frame 2 via a pair of front and rear retainers 31 and bolts 33 for fastening these to nuts of the spacer 30.
9 (see FIG. 2).

At the center of the rectangular frame 29, the space between the batteries 4 is made wider by the space 30a, and a reinforcing member 34 is added to the lower side. The reinforcing member 34 includes a pair of channel members 35 having a flange 35a and brackets 35b connected to both ends of the pair of channel members 35. The reinforcing member 34 connects the flange 35a of the channel member 35 to the lower surface of the front and rear longitudinal beam members 28 on the upper side. , Bracket 35 of channel material 35
By coupling b to the inner surfaces of the front and rear vertical beam members 28 on the lower side, the center of the lower stage is assembled so as to extend in the front-rear direction (see FIGS. 2 and 5).

The frame 21 is formed by vertically moving the two independent structures 21a and 21b forward and backward with respect to each other.
At 8 it is connected back to back (see FIGS. 3 and 4). The cover 22 is formed from a plate attached to each surface (excluding the lower surface) of the frame 21. The plate is provided with a number of small holes in order to ensure air permeability in the battery box 20. The small hole is formed in a size that does not allow a small foreign matter including a human finger to enter, and prevents the foreign matter or the like from touching the battery terminal 4a.

With such a configuration, a large number (24 in this example) of batteries 4 can be efficiently stored in two rows in the upper and lower stages through the frame 21 inside the battery box 20. Especially the installation surface of the battery 4 (rectangular frame 29)
Are provided in two upper and lower stages, so that the planar efficiency in the battery box 20 can be increased. In addition, since the battery 4 is fixed to the rectangular frame 29 in a state of being laid horizontally, the battery box 2
The height of 0 is also kept low, so that the in-vehicle property can be secured well.

The battery box 20 supports the weight of the battery with a frame, and secures handling safety with a cover. Therefore, a battery box which is lightweight as a whole and can be easily maintained can be realized at low cost.

The frame 21 is composed of each of the constructs 21a, 21b
A pair of longitudinal beams 28 on the lower side between the upper level and the lower level
A high strength rigidity can be secured by adding a reinforcing member 34 for connecting the central portions of the above and connecting these constructs 21a and 21b back and forth. In addition, the front and rear constructs 21a and 21b are connected by their lower surfaces by the frame bracket 23 for fixing to the vehicle body, the pawl guide 24 of the forklift, and the terminal boxes 25a and 25b, so that the rigidity of the frame 21 is increased. Can be expected.

A groove-shaped guide rail 24 for receiving the frame bracket 23 of the battery box 20 is attached to the floor of the battery chamber 12 so as to guide the movement in the front-rear direction as the battery box 20 is taken in and out. Has become. Between the frame bracket 23 and the guide rail 24, the battery box 20 is
2 is provided with a lock mechanism (not shown) (see FIG. 1).

[Brief description of the drawings]

FIG. 1 is a layout diagram illustrating an embodiment of the present invention.

FIG. 2 is a vertical sectional view of the battery box.

FIG. 3 is a cross-sectional view of the battery box.

FIG. 4 is a plan sectional view of the battery box.

FIG. 5 is a partially exploded perspective view of the frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power room 2 Engine 3 Generator 4 Battery 4a Battery terminal 5, 6 Electric motor 12 Battery room 20 Battery box 21 Frame 21a, 21b Structure 22 Cover 23 Frame bracket 24 Forklift claw guide 25a, 25b Terminal box 26 Column member 26a , 26b Support surface 27 Horizontal beam member 28 Vertical beam member 29 Rectangular frame 30 Spacer 31 Retainer 33 Bolt 34 Reinforcing member

Continuing on the front page (72) Inventor Yuji Kusara Nissan Diesel Kogyo Co., Ltd., Ichibanchi, Daio-Chome, Ageo City, Saitama Prefecture (72) Inventor Toshihiko Abe Nissan Diesel Kogyo Co., Ltd.

Claims (6)

[Claims] In a vehicle provided with a battery box for accommodating a large number of batteries and a motor for driving the vehicle driven by these batteries as a power source, a framework for partitioning the inside of the battery box into two upper and lower sections is constructed. A battery box device, wherein a plurality of batteries are arranged in a partitioned space. 2. In a vehicle provided with a battery box for accommodating a large number of batteries and an electric motor for driving the vehicle driven by the power source, a frame for partitioning the inside of the battery box into two upper and lower sections is constructed. A battery box device, wherein a plurality of batteries are arranged in a space in a state of being laid horizontally. 3. As the building elements of the frame, four pillar members having two upper and lower support surfaces, a pair of left and right cross beam members connecting the front and rear pillar members on the same support surface, and the left and right pillar members 3. The battery box device according to claim 1, further comprising: a pair of front and rear longitudinal beams connecting the first and second members. 4. 4. The battery box device according to claim 3, wherein a bracket for fixing to a vehicle body and a bracket for a pawl guide of a forklift are connected to a lower surface of the frame. 5. The battery box device according to claim 3, further comprising a reinforcing member for connecting a central portion of the pair of front and rear longitudinal beams on the lower side between the upper and lower stages of the frame. 6. The frame according to claim 3, wherein each of the frames is divided into two sets of a front part and a rear part as independent structures, and these structures are connected back to back with each other by longitudinal beams. The battery box device according to claim 5.