JPH10121960A - Battery ventilating device for electric motor car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently ventilate battery cells in a battery box so as to lower the performance and use life of the battery. SOLUTION: In a battery box formed therein an air inlet port 4 and a plurality of discharge ports 5a, 5b, blower devices 11a, 11b are provided in the discharge ports 5a, 5b. Shut-off plates which are opened by wind pressure from blowers Ba, Bb and which is closed when the blowers Ba, Bb are stopped, are fitted to blow-out ports 7a, 7b in the blower devices 11a, 11b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery device used as a power source for an electric vehicle such as an electric vehicle, and more particularly to a battery ventilator for ventilating a battery box containing battery cells.

[0002]

2. Description of the Related Art As shown in FIG. 6, a battery device used as a power source of an electric vehicle or the like has a large number of battery cells 1 paired in a battery box 2 so as to be rapidly charged. Have been.

Each of these battery cells 1 generates gas during charging and generates heat during running of the vehicle. However, when the calorific value of the battery cell 1 exceeds a certain area, the charging efficiency of the battery cell 1 decreases. Since a problem such as a decrease in performance and a decrease in life occurs, a ventilation device is conventionally provided in the battery box 2 to sufficiently ventilate the inside (Japanese Patent Laid-Open No. 6-1150). reference).

The conventional battery ventilator 3 is provided between the battery cells 1 or between the battery box 2 and the battery cells 1 so that the ventilation air and the battery cells 1 are sufficiently in contact with each other inside the battery box 2. A passage D having a predetermined width is formed. An inlet 4 having a relatively large opening is provided at one end of the battery box 2, and a plurality of outlets 5a and 5b are provided at the other end facing the battery box 2. The outlets 5a and 5b are provided with blower devices 6a and 6b for ventilation, respectively.

[0005] By driving the motors Ma and Mb, air is sucked from the intake port 4 as shown by solid arrows in the figure, and formed between the battery cells 1 or between the battery box 2 and the battery cells 1. The gas is discharged to the outside from the outlets 7a and 7b through the passage D to discharge gas and cool the battery cell 1.

[0006]

However, in this battery ventilator 3, if one of the plurality of blowers 6a, 6b, for example, the blower 6a on the upper side in the figure fails, the failed blower 6a As shown by the broken line, air flows in from the outlet 7a, and is discharged from the outlet 7b through the outlet 5b of the blower 6b on the lower side where there is no failure.

[0007] When a short path of ventilation occurs as described above, the air indicated by the broken line has a smaller airflow resistance than the air indicated by the solid line arrow flowing through the intake port 4 and flowing through the battery box 2, and thus flows more easily. There is a possibility that the ventilation around the battery cell 1 is not sufficiently performed, and the performance and the life of the battery cell 1 are reduced.

When the blower devices 6a and 6b are not driven, foreign substances such as dust and dirt are discharged from the outlets 7a and 7b.
Not only does it accumulate at the outlets 7a and 7b, but also the passage D
And the like, and the airflow resistance of the air flowing out of the outlets 7a and 7b through the passage D is increased, and as a result, the performance of the battery cell 1 may be reduced.

The present invention has been made in view of the above-mentioned problems of the prior art, and provides a battery ventilator in which ventilation of a battery cell in a battery box is sufficiently performed and the performance and life of the battery cell are not reduced. With the goal.

[0010]

To achieve the above object, according to the present invention, a plurality of blower devices are mounted on a battery box containing a large number of battery cells, and the battery cells in the battery box are provided. In a battery ventilator for an electric vehicle that cools a battery and discharges gas from a battery cell, a check valve that opens at an outlet of the blower device by wind pressure of the blower and swings so as to close the outlet when the blower stops. It is characterized in that it has an open / close plate.

With this configuration, even if one of the plurality of blower devices fails, air does not short-circuit between the blower devices, and the battery in the battery box is sufficiently cooled and ventilated. Does not enter the battery box through the outlet when dust is stopped.

According to a second aspect of the present invention, the check valve-like opening / closing plate is mounted on at least one of a plurality of blower devices.

With this configuration, since at least one check valve-like opening / closing plate is present, cooling of the battery, ventilation, and prevention of intrusion of dust and the like can be achieved.

According to the third aspect of the present invention, the check valve-like opening / closing plate is formed of a deformable plate having an upper end supported by an upper end of a blower opening of a blower case of the blower device and a lower end formed as a free end. It is characterized by the following.

With this configuration, the opening / closing plate can close the outlet by its own weight, and can prevent intrusion of rainwater and the like.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a battery ventilator according to the present invention will be described below with reference to FIGS. In addition,
The same reference numerals are used for the parts common to the prior art.

FIG. 1 is a plan view showing an embodiment of a battery ventilator according to the present invention, FIG. 2 is an enlarged perspective view of a main part of FIG. 1, and FIGS. FIG. 5 and FIG. 6 are plan views showing air flow states.

As shown in FIG. 1, a battery ventilator 10 according to the present embodiment has a large number of battery cells 1 arranged in a pair and housed therein, and an intake port 4 having a relatively large opening at one end. The battery box 2 has discharge ports 5a and 5b at the other end, and ventilation blowers 11a and 11b provided at the discharge ports 5a and 5b, respectively.

The battery box 2 is a box closed by a rectangular parallelepiped lid, and is provided between the battery cells 1 or between the battery box 2 and the battery cells so that the ventilation air and the battery cells 1 are sufficiently in contact with each other. A passage D having a predetermined width is formed between the two.

Since the blower units 11a and 11b have the same configuration, only one of them will be described without adding the suffixes "a" and "b". As shown in FIG. Is provided with a blower B, and a motor M is connected to the blower B.

In the blower case 14, a suction port (not shown) communicating with the discharge ports 5a and 5b is opened on a side surface, and a blower B is installed in the vicinity of the suction port so as to be opposed.
The air sucked from the suction port passes through the spiral blower case 14 and is discharged from the outlet 7 to the outside.
As shown in FIG. 1, the air discharged from the outlets 7a, 7b of the pair of blower devices 11a, 11b is discharged in a direction away from each other so as not to collide with each other.

The outlet 7 has a rectangular shape, and a frame 15 is provided here. This frame 15
Is an outer peripheral frame 15a provided on the outer periphery of the outlet 7;
One horizontal member 15b is provided in the center of the outer peripheral frame 15a in the horizontal direction, and two vertical members 15c are provided between the horizontal member 15b and the outer peripheral frame 15a. The outlet 7 is divided in a lattice shape.

Particularly, in the present embodiment, the outer peripheral frame 15a
The upper ends of the opening / closing plates 16 and 16 are fixed to the upper part and the horizontal member 15b in a swingable manner by a fixing tool such as a screw 17 so that the entire outlet 7 is closed like a check valve. In addition,
The reason why the opening / closing plates 16 and 16 are divided into two upper and lower parts and which are respectively attached to the upper part of the outer peripheral frame 15a and the horizontal member 15b is to enable one opening / closing plate 16 to be opened and closed with a smaller wind pressure.

Therefore, each of these check valve-like opening / closing plates 1
When the blower B is driven, as shown in FIG. 3, the blower B opens toward the front of the outlet 7 and blows air as shown in FIG. As shown in (1), the blower 7 comes into contact with the frame 15 and the blower 7 is closed to prevent foreign matter such as dirt and dust from entering the blower case 14 from the outside.

It is preferable that the opening / closing plate 16 is not made of a rigid body but made of a deformable plate material, for example, rubber or synthetic resin. With this configuration, the outlet can be easily closed, and entry of rainwater or the like can be prevented.

Next, the operation of the above embodiment will be described.
When the two blower devices 11a and 11b are driven, air is sucked into the battery box 2 from the intake port 4 as indicated by arrows in FIG. 5, and each battery cell 1 in the battery box 2 is cooled. The air after cooling passes through the outlets 5a and 5b,
Check valve-like opening / closing plates 16 and 1 of the blower devices 11a and 11b
6 is pushed forward, and is discharged outside through the outlets 7a and 7b.

Here, of the blower devices 11a and 11b,
If the upper blower device 11a breaks down and stops, the air blown out from the blower device 11a stops, so that the blowout port 7a is closed by the weight of the opening / closing plate 16a.

Then, the air sucked into the battery box 2 from the intake port 4 is discharged from the outlet port 7b through the discharge port 5b of the lower blower device 11b as shown by an arrow in FIG. . In this case, the opening / closing plate 16a of the outlet 7a is closed not only by its own weight but also by the air blowing force of the blower device 11b.

Therefore, the air is sucked into the battery box 2 from the intake port 4, which is the original inlet, and flows out from the outlet 7a. The short path of the air described above is prevented, and one blower device 11b is used. Battery box 2
The cooling of the battery cells 1 in the inside is continued.

When the operation of the battery ventilator 10 is stopped, the outlets 7a, 7b of the two blowers 11 are closed by their own weight by the open / close plate 16, so that dirt, dust and the like accumulate in the outlets 7a, 7b. The battery cell 1 does not enter the battery box 2, and the ventilation around the battery cell 1 is sufficiently performed, so that the performance and the life of the battery cell 1 are prevented from lowering, and the entry of rain water and the like can be prevented.

In the present embodiment, the blower device 11
The number of the opening / closing plates 16 of the outlets 7a and 7b of a and 11b is two, but may be one or three depending on the case.
There is no particular limitation.

[0032]

As described above, according to the first aspect of the present invention, since the check valve-shaped opening / closing plate is attached to the outlet, even if one of the plurality of blower devices breaks down, the blower is blown. Air does not short-circuit between the devices, cooling and ventilation of the batteries in the battery box are sufficiently performed, and even when the blower device is stopped, foreign matter such as dirt and dust may enter the battery box from the air outlets. There is no.

According to the second aspect of the present invention, since at least one check valve-like opening / closing plate is present, the battery can be cooled, ventilated, and intrusion of dust or the like can be prevented.

According to the third aspect of the present invention, the opening / closing plate is
The outlet can be closed by its own weight, and in addition to preventing short paths and preventing intrusion of dust and the like, entry of rainwater and the like can be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part of FIG.

FIG. 3 is a longitudinal sectional view showing an operation state of the embodiment.

FIG. 4 is a longitudinal sectional view showing an operation state of the embodiment.

FIG. 5 is a plan view showing a flow state of air according to the embodiment.

FIG. 6 is a plan view showing a flow state of air according to the embodiment.

FIG. 7 is a plan view showing a state of air flow by a conventional blower.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Battery cell, 2 ... Battery box, 4 ... Inlet, 10 ... Battery ventilator, 7a, 7b ... Outlet, 14 ... Blower case, 15 ... Frame, 16a, 16b ... Opening / closing plate, Ba, Bb ... Blower .

Claims (3)

[Claims] An air inlet (4) for sucking outside air into a battery box (2) containing a large number of battery cells (1), and a battery box
(2) A plurality of outlets (5a, 5b) for discharging the air inside are provided, and the blowers (11a, 1b) are respectively connected to the outlets (5a, 5b).
1b) In a battery ventilator for an electric vehicle equipped with the blower, the blowers (11a, 11b) have outlets (7a, 7b),
Opened by wind pressure of blower (Ba, Bb), blower (Ba, Bb)
A battery ventilator comprising a check valve-like opening / closing plate (16a, 16b) that swings so as to close the outlets (7a, 7b) when the operation is stopped. 2. The check valve-like opening / closing plate (16a, 16b) includes at least one of the plurality of blower devices (11a, 11b).
The battery ventilator according to claim 1, wherein the battery ventilator is mounted on one of the battery vents. 3. The check valve-like opening / closing plate (16a, 16b) has an upper end supported by an upper end of an outlet (7a, 7b) of a blower case (14) of the blower device (11a, 11b). The battery ventilator according to claim 1, wherein the battery ventilator is formed of a deformable plate having a free end.