JPS6089063A - Battery compartment of electric car - Google Patents

Abstract

PURPOSE:To simplify a construction, make a car body light, and effectively use a space by installing an air introducing path and an air discharge path in a battery compartment, and positioning an inlet of the air introducing path in the positive pressure part of a car and an outlet of the discharge path in the negative pressure part. CONSTITUTION:An air introducing path D is formed in the front of a battery compartment C and an air discharge path H is in the rear. The introducing path D is formed in such a way that a wind introducing plate 35 is mounted in the back of air passing hole 34 which is installed in a floor panel 21 to form air flow path between the wind introducing path D and the panel 21, and an air introducing hole 36 is positioned in the positive pressure part which is generated by air flowing along a car body during car traveling. The air discharge path H is formed in such a way that an air flow path is formed by air passing holes 37 and 38 which are installed in a rear separating plate 24 and an inner panel 32a of a back door 32 respectively and an outer panel 32b of the back door 32, and an air discarge hole 39 is positioned in the negative pressure part which is generated by air flowing along the car body.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a battery storage box for an electric vehicle.

[Prior art]

1 and 2 are cross-sectional views showing a conventional battery storage box disclosed in Japanese Utility Model Publication No. 50-23621.

In the figure, 1 is an electric bus powered by a battery 2, and 3 is a storage box with a lid that houses all of the batteries 2. The batteries 2 are housed in regular arrays in the vertical and horizontal directions. That is, a plurality of batteries 2 are placed in a narrow gap 4 in the lateral direction.
A dividing plate 5 is interposed in the vertical direction, and a narrow passageway 6 in the vertical direction is provided below the dividing plate 5 for storage. 7 is an air intake duct attached to the front of the storage box 2, 8 is a suction type cooling fan attached to the rear of the storage box 2, and 9 is an air intake duct 7.
A first slit plate 10 for distributing the air taken in from the slit plate 10 is a second slit plate that opens into the narrow air passage 6.

Note that 11 is a gas phase catalyst plug of the battery 2.

With such a configuration, when the suction type cooling fan 8 is operated, the outside air passes through the entire intake duct 7 and is sucked into the storage box 3. At this time, the sucked outside air is divided by the first slit plate 9 so that the air volume is evenly distributed and sucked into the storage box 3. Most of the sucked outside air is discharged to the outside from the second slit plate 10 through the slit ventilation passage 6, as shown by arrow A in FIG. At the same time, a part of the outside air passes through the upper part of the storage box 3, passes through the narrow gap 4 between the batteries 2.2, and is sucked out to the lower part of the storage box 3, as shown by arrow B in FIG. It merges with the outside air flowing through the narrow ventilation passage 6 and is discharged to the outside.

Due to this flow of outside air, most of the heat generated from the battery 2 is discharged from the storage box 3 to the outside. As a result, the amount of heat trapped inside is reduced, the temperature rise of the battery 2 is suppressed, and deterioration of its performance is prevented. In addition, the gases generated from the battery 2, including hydrogen gas, are also discharged to the outside in the same way, so the gases are not released into the passenger compartment.
There is no risk of leakage, and there is no possibility that gas will become trapped inside the storage box 3 and explode.

However, in such a conventional battery storage box, a suction type cooling fan 8 is used to connect the air intake duct) 7.
Since the storage box 3 is configured to forcibly ventilate the interior of the storage box 3 by sucking in outside air and discharging it, it has the following drawbacks.

([) There is a drawback that the cooling fan 8 and its maintenance and management cost a lot of money, and its power consumption also increases. Consuming power in this manner is undesirable for electric vehicles used in batch IJ' as a power source.

(2) Since the cooling fan 8 and the intake duct 7 for increasing its suction effect are required, the number of man-hours for assembling them increases, resulting in high costs.

(3) To install the cooling fan 8 and intake duct 7,
The battery storage box 3 as a whole becomes large and heavy,
This has the disadvantage that it occupies limited space in the automobile and has a negative effect on its weight reduction.

[Purpose of the invention]

This invention was made in order to solve the conventional entry point, and provides ventilation holes in the wall or car body at the front and rear of the storage box, and completely forms an air introduction path and an exhaust path, respectively.
In addition, by having the former's air inlet port facing the negative pressure part of the car body and the latter's exhaust port facing the negative pressure part of the car body, the structure is simple and inexpensive, maintenance costs are low, and the weight of the car body is reduced. The purpose of the present invention is to provide a storage box for electric vehicles that can make effective use of space.

[Structure of the invention]

The battery storage box according to the present invention includes a storage box with a sealed structure in which a top lid is attached so as to be openable and closable via an elastic sealing member;
The storage box is composed of an air introduction passage provided at the front of the storage box and an exhaust passage provided at the rear. The exhaust passage is located facing the pressure part, and the exhaust port is also arranged so as to face the negative pressure part of the car body generated by the air flowing along the car body when driving. .

〔Example〕

3 to 10 are diagrams showing an embodiment of the present invention.

Figure 3 is a schematic configuration diagram shown in cross section, Figures 4 to 6 show the main parts in detail, and Figures 7 and 8 are
The structure shown in the figure is shown in a perspective view, and FIGS. 9 and 10 explain the main parts of FIG. 8 in detail. Note that in each figure, the same parts are indicated by the same reference numerals.

In the figure, C is a storage box for battery B, D is an air introduction path provided at the front of storage box C, and H is an exhaust path provided at the rear of storage box C.

Storage box C has a floor panel 21 forming the bottom.

Rear side panels 22.22 forming left and right side walls, curved part separator 23 and rear separator 24 forming front and rear side walls,
It is constructed by attaching an upper lid 27 to a box body 26 formed by airtightly assembling an upper frame panel 25.

28 is an elastic sealing member that seals between the top lid 27 and the box body 26, and is attached to the edge of the upper frame panel 250.
There is ``'C.

The upper lid 27 is made of a lightweight and highly rigid panel made by sandwiching and covering an aluminum honeycomb with thin resin plates.

As shown in FIG.
9, and as shown in FIG. 9, the bolt 30' inserted into the hole on the rear side is screwed into the nut 31 attached to the frame panel 25, so that it can be fixed to the box body 26. When fixed in this manner, the upper lid 27 is attached to the box body 26 via the seal member 28, so the storage box C has a sealed structure. 'Also, since the front side of the top cover 27 has a removable pin pin, remove the bolts 30 on the rear side and connect it to the back door 32 with a string 33 as shown in Figure 8. If you put it in place, you can open and close it in conjunction with the opening and closing.

Patch IJB is a new type of iron-nickel battery, and as shown in Figure 6, it is stored in pots in multiple rows vertically and horizontally. This battery is more likely to generate heat when a load is applied than a lead-acid battery, and when the temperature rises due to the heat generation, performance is likely to be adversely affected. Additionally, they generate a lot of water and gas, especially when charging.

The air introduction path is a ventilation hole 34 provided in the floor panel 21.
An air flow path is formed between the air guide plate 35 shown in FIG. 4 and the floor panel 21 behind the air guide plate 35 shown in FIG. As shown in FIG. 3, the air inlet 36 opened at the front faces a positive pressure area of the vehicle body generated by air flowing along the vehicle body when the vehicle is running. In this embodiment, a positive pressure position is provided in the direction of travel of the vehicle body, where air flowing along the vehicle body during travel can be directly introduced. Although not shown, if the floor panel 21 is made to protrude downward to provide a protruding part and the above-mentioned ventilation hole 34 is provided in the positive pressure part on the front side, this can be used as an air inlet at the same time as an air inlet passage. be able to.

As shown in FIG. 5, the exhaust path H includes ventilation holes 37 and 38 provided in the rear separator 24 and the inner panel 32a of the back door 32, respectively, and the outer panel 3 of the back door 32.
This is an air flow path formed by connecting the exhaust port 39 provided in the air outlet 2b. The exhaust port 39 faces a negative pressure section of the vehicle body generated by air flowing along the vehicle body when the vehicle is running.

Reference numeral 40 denotes a sealing member attached to the edge of the ventilation hole 37 provided in the rear separator 24, which seals between the back door 327 and the inner panel 32a when the back door 327 is fully closed. Therefore, when the back door 32 is closed, the storage box C is connected to the exhaust path H, and the exhaust port 3
9 opens to the negative pressure section of the vehicle body.

Reference numeral 41 indicates a hood for the exhaust port 39, and reference numeral 42 indicates a switch for cutting off a large current from battery B to prevent it from flowing.

Next, the action will be explained.

When the car is in running condition, the floor panel 2 of the car body
The outside air flowing along 1 enters from the air introduction port 36 and is blown into the storage box C through the air introduction path D-i. Then, it passes through the exhaust path H and is discharged to the outside air again from the exhaust port 39.

At this time, the part of the air inlet 36 is always in a positive pressure state due to the air flow, and the part of the exhaust port 39 is always in a negative pressure state. The suction power is multiplied.

That is, the outside air is forced into the storage box C through the air inlet 36, and the outside air is sucked out through the exhaust port 39. As a result, as long as it is in running condition,
The outside air will pass through the storage box C without interruption.

Therefore, the heat generated from the batch IJB due to the running load is discharged to the outside by the outside air passing through the inner metal of the storage box C as described above, suppressing the rise in temperature of the battery and preventing deterioration of its performance. . Similarly, hydrogen gas and the like generated from battery B are also discharged, so that these gases will no longer be trapped in storage box C and cause an explosion, and there will be no fear that they will be released into the single room.

On the other hand, when the vehicle is stopped and the battery B is charged, the hydrogen gas generated can be directly released into the outside air by opening the top cover 27 of the storage box C in conjunction with the back door 32.

In the embodiment, a case where the batches IJBk are arranged without a gap is shown, but it is also possible to arrange the batches with a certain gap between them. When arranged in this way, the cooling effect of the battery is further improved.

〔Effect of the invention〕

As explained above, the present invention forms an air introduction passage and an exhaust passage in the storage box by providing ventilation holes in the wall of the storage box or the vehicle body, and connects the air inlet of the air introduction passage to the right side of the vehicle body. Since the pressure part and the exhaust port of the exhaust path face the negative pressure part of the vehicle body, the structure is simplified and the cost of cooling fans and intake ducts, their assembly, and maintenance management can be reduced. At the same time, by eliminating the need for these parts, it is possible to reduce the size of the vehicle body and make effective use of space.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a conventional electric vehicle battery storage box.
Figure 2 is an enlarged sectional view of Figure 1, and Figures 3 to 1.
0 shows an embodiment of the present invention, FIG. 3 is a cross-sectional view showing the general configuration, and FIG. 4 is a perspective view of the air guide plate in FIG. 3.
Fig. 5 is an enlarged view of part 7 in Fig. 3, Fig. 6 is a plan view of the main part of Fig. 3 with the upper lid 'fi removed, Figs. 7 and 8 are perspective views of Fig. 3, and Fig. 9 is a perspective view of Fig. 3. The figure is an enlarged view of the main part of Fig. 8, and Fig. 1θ is an enlarged view of the main part of Fig. 9. 27...Top lid 28...Elastic seal member C...
・・・・・・Storage box D・・・・・・・・・Air introduction path H・・・・・・
...Exhaust passage 36...Air inlet port 39...Exhaust port

Claims (1)

[Claims] It consists of a storage box with an airtight structure whose top lid is attached so that it can be opened and closed via an elastic sealing member, an air introduction passage provided at the front of the storage box, and an exhaust passage provided at the rear of the storage box. , the air inlet is arranged so as to face the positive pressure part of the car body generated by air flowing along the car body when driving,
A battery storage box for an electric vehicle, characterized in that the exhaust passage is arranged so that its exhaust port faces a negative pressure section of the vehicle body generated by air flowing along the vehicle body during driving.