JPS633088Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a collective exhaust system for assembled batteries used in electric vehicles and the like.

Conventionally, this type of collective exhaust system can be broadly classified into water trap type and filter type. The water trap system introduces the gas generated from the storage battery into the water, creating discontinuous bubbles as the gas rises from the water to the water surface, thereby preventing an explosion due to the generated gas. However, with this method, if gas is suddenly generated or if water escapes due to vibrations, tilting, etc., gas bubbles will become large and the explosion-proof effect is insufficient.

On the other hand, the filter type has an explosion-proof filter attached to the outlet of the generated gas. This method is very effective when bulk water replenishment is not performed, but if the gas path that accompanies bulk water replenishment also serves as the water replenishment route, it is not recommended to install an explosion-proof filter at the water replenishment outlet. Can not.
For this reason, a water trap system must be used for the replenishment water outlet, which poses a safety problem. Also, by making the explosion-proof filter coarser,
There are some types that allow gas and water to be discharged at the same time, but these also have safety issues.

This invention was made in view of the above circumstances,
The purpose is to provide a collective exhaust system that has both water trap and filter functions and is highly safe.

That is, in the present invention, a first gas inlet communicating with the gas inlet is provided in an exhaust tank provided with a gas inlet and a gas outlet.
an exhaust chamber, a second exhaust chamber communicating with the upper part of the first exhaust chamber, a third exhaust chamber communicating with the lower part of the second exhaust chamber and containing water therein, and a gas flow in the third exhaust chamber. an explosion-proof filter installed with water immersed in the passage, and a fourth exhaust chamber communicating with the third exhaust chamber and the gas outlet.
This is a collective exhaust device for a storage battery that is provided with an exhaust chamber and exhausts gas that flows in from the gas inlet through the gas outlet through an explosion-proof filter.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of the collective exhaust device. This device has first to fourth exhaust chambers 2 to 5 in an exhaust tank 1.
is formed. This exhaust tank 1 is made of synthetic resin, and has a gas inlet 6 formed at the lower part of one side wall and a gas outlet 7 formed at the upper part of the other side wall. The first exhaust chamber 2 communicates with the gas inlet 6, and communicates with the second exhaust chamber 3 at the upper portion. This second exhaust chamber 3 has a water overflow prevention plate 8 having a large number of holes attached to its upper part, and a perforated plate 9 attached to its lower part.
A third exhaust chamber 4 communicates with the lower part of the second exhaust chamber 3 through the perforated plate 9, and a ceramic explosion-proof filter 10 is attached to the gas flow path of the third exhaust chamber 4. There is. This explosion-proof filter 10 has a hole diameter of
It has a diameter of 100 to 350μ, and the pore diameter and apparent surface area are appropriately selected depending on the amount of gas generated and the amount of inflow. A fourth exhaust chamber 5 is formed above the third exhaust chamber 4 with the explosion-proof filter 10 interposed therebetween. The fourth exhaust chamber 5 is provided with a water overflow prevention plate 11 on its upper inner wall and communicates with the gas outlet 7. The interior of the third exhaust chamber 4 and the lower portions of the second exhaust chamber 3 and fourth exhaust chamber 5 are filled with water, and the explosion-proof filter 10 is always immersed in water.

However, in the collective exhaust system having the lever structure, gas generated from the storage battery enters the first exhaust chamber 2 through the gas inlet 6 and enters the second exhaust chamber 3 through the overflow prevention plate 8 . The gas entering the second exhaust chamber 3 pushes down the water surface, and when it enters the third exhaust chamber 4, it passes through the explosion-proof filter 1.
0, enters the fourth exhaust chamber 5 as small bubbles, passes over the overflow prevention plate 11, and is exhausted from the gas outlet 6. Here, the explosion-proof filter 10 is always in contact with water due to the balance of the second to fourth exhaust chambers 3 to 5,
It contains water, and after the gas passes through it, it is immediately sealed in water.

Similarly, water during bulk water replenishment enters the first exhaust chamber 2 from the gas inlet 6 and enters the second exhaust chamber 3 via the overflow prevention plate 8. The water that has entered the second exhaust chamber 3 enters the third exhaust chamber 4, passes through the explosion-proof filter 10, enters the fourth exhaust chamber 5, crosses the overflow prevention plate 11, and exits from the gas outlet 6.

The overflow prevention plates 8 and 11 are designed to prevent water from overflowing from the second and fourth exhaust chambers 3 and 5 even when shaken, vibrated, tilted, or the like.

Next, another embodiment shown in FIG. 2 will be explained.
In this collective exhaust system, the upper part of the fourth exhaust chamber 5 is widely opened to form a gas exhaust port 6, gas is exhausted from this open area, and water is drained from an outlet 12 provided on the side wall. be. According to this structure, since the upper part is wide open, the explosion-proof property is further improved. In this case, the overflow prevention plate 11 and the outflow port 6 need to be lowered to a level that does not disrupt the balance between the second exhaust chamber 3 and the fourth exhaust chamber 5.

Next, in the collective exhaust system shown in FIG. 2, an explosion-proofing test was conducted by using an explosion-proof filter having a pore diameter larger than the hydrogen extinguishing distance, and introducing gas generated by the storage battery from the gas inlet. As a result, the first
No explosion was detected in any of the 4th exhaust chambers.

As described above, according to the present invention, all of the generated gas passes through the explosion-proof filter, and the moisture present in the filter increases the explosion-proof function, and it also has the safety feature of a water trap, compared to conventional devices. This has the remarkable effect of increasing safety.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a storage battery collective exhaust device showing one embodiment of the present invention, and FIG. 2 is a cross-sectional view of a storage battery collective exhaust device showing another embodiment of the present invention. 1... Exhaust tank, 2... First exhaust chamber, 3... Second
Exhaust chamber, 4...Third exhaust chamber, 5...Fourth exhaust chamber,
6... Gas inlet, 7... Gas outlet, 8, 11
...Overflow prevention plate, 9... Porous plate, 10... Explosion-proof filter, 12... Outflow port.

Claims (1)

[Scope of utility model registration request] Inside the exhaust tank with a gas inlet and a gas outlet,
a first exhaust chamber that communicates with the gas inlet; a second exhaust chamber that communicates with the upper part of the first exhaust chamber; and a third exhaust chamber that communicates with the lower part of the second exhaust chamber and that contains water. , an explosion-proof filter installed in the gas flow path of the third exhaust chamber in a state immersed in water, and a fourth exhaust chamber communicating with the third exhaust chamber and the gas outlet are provided, and the gas flowing in from the gas inlet is provided. A storage battery bulk exhaust device that exhausts gas from the gas outlet through an explosion-proof filter.