JPH0134280Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an exhaust/drainage device attached to the end of the bulk water replenishing device in a storage battery device equipped with a bulk water replenishing device.

Conventionally, in storage battery devices used as group batteries, such as storage batteries for electric vehicles and storage batteries for electric vehicles, a collective water replenishment device has been provided that can refill all batteries at once in order to save the trouble of refilling each battery with water. ing. Conventionally, at the end of this type of bulk water replenishment system, surplus purified water during refilling is discharged to the outside, and drainage is also required to prevent fire from approaching the gas generated from the storage battery and causing an explosion. An exhaust device with a built-in mechanism is provided, for example, an anti-explosion exhaust plug equipped with an anti-explosion filter such as an alumina sintered filter. However, a common drawback of this type of device is that when electric vehicles and electric vehicles are used in winter in cold regions, after water replenishment, the moisture that has accumulated in the gaps between detonation filters such as alumina sintered filters freezes, causing the gaps between the filters to freeze. If the filter becomes clogged, preventing the exhaust of hydrogen and oxygen gas in the collective exhaust system, the internal pressure inside the battery will increase and there is a risk of battery damage. Otherwise, exhaust will be concentrated from areas with little wetness, which may reduce detonation performance. Furthermore, if the hydrogen/oxygen gas mixture inside the battery is ignited, an explosion will occur, which may not only cause the battery to explode, but also lead to personal injury, which is one of the factors hindering the widespread use of electric vehicles.

The purpose of the present invention is to eliminate the above-mentioned drawbacks, improve the reliability of the exhaust, drainage, and anti-explosive properties of the exhaust/drainage device installed in a storage battery device equipped with a bulk water replenishment device even during winter use in cold regions, and The goal is to improve the reliability of electric vehicles, etc.

In other words, the present invention has an exhaust/drainage system inside the main body of the exhaust/drainage device, which has a gas dilution space whose upper and lower surfaces are made of non-ventilated plates and whose side surfaces are entirely or partly made of ventilation members such as wire mesh or shutters. By introducing the tip of the introduction pipe that guides drainage and exhaust from the storage battery and positioning it near the bottom plate, the gas exhausted from the storage battery is dispersed and diluted within the main body of the exhaust/drainage device, and hydrogen gas is To provide an exhaust/drainage device configured to exhaust the gas to the outside at a concentration of 3% or less of the lower explosive limit, and to prevent flames from directly approaching the tip of the introduction pipe using a wire mesh or the like.

Next, the present invention will be specifically explained using an example illustrated in the drawings. Incidentally, since the collective water replenishment device for this type of storage battery is already known, the explanation thereof will be omitted here.

FIG. 1 shows an example of a conventional exhaust/drainage device of this type, and FIGS. 2 to 5 show an embodiment of the exhaust/drainage device according to the present invention. Further, FIG. 6 shows an example of the structure for introducing the introduction pipe of the exhaust/drainage device into the main body of the exhaust/drainage device according to the present invention, and FIG. 7 shows an example of the drainage structure. Further, FIG. 8 shows another embodiment of the exhaust/drainage device in the storage battery device of the present invention, and FIG. 9 shows the anti-explosion performance of the exhaust/drainage device in the storage battery device of the invention.

In each figure, 1 is the exhaust/drainage device main body, 2 is the alumina sintered filter, 3 is the introduction pipe for introducing drainage and exhaust from the storage battery into the exhaust/drainage device main body 1, and 4 is the exhaust/drainage device main body. 5 is a wire mesh that covers the sides, 6 is a bottom plate, 7 is a shutter, 8 is a gas dilution space within the main body of the device,
In order to promote gas dispersion, an internal partition wall 9 is supported on the part of the inlet pipe 3 located inside the device body.
1 is a bottom plate with drainage holes provided at its four corners, and 10 is a drainage hole formed at the four corners of the bottom plate.

In the conventional system shown in Fig. 1, the spacing between the filters 2 becomes clogged with water due to excess water during water replenishment, which can lead to freezing in cold regions, and the filter 2 becomes wet, reducing the air permeability of the filter. This has the disadvantage that the detonation performance is significantly reduced due to the non-uniformity of the detonation.

In the embodiment of the present invention shown in FIG. 2, the introduction pipe 3 is introduced into the exhaust/drainage device main body 1 by passing it through approximately the center of the upper plate 4, and the opening at the tip of the introduction pipe 3 is opened from the lower plate 6. They are placed approximately 5 mm apart, and the sides of the main body 1 of the exhaust/drainage device are constructed with a wire mesh 6. In addition, it is best to extend the tip of the introduction pipe as far down as possible.
Although it is advantageous for the dispersion of exhaust gas, it is preferable to space it approximately 5 mm from the bottom plate 6 in order to drain water from the opening at the tip of the introduction pipe 3. The embodiment of the present invention shown in FIG. 3 has the same shape as the embodiment shown in FIG. 2, but a shutter 7 is provided in place of the wire mesh 5 in the embodiment shown in FIG.

Next, to explain the operation of this embodiment, since hydrogen gas is lighter than air and has the property of being easily dispersed in the atmosphere, the gas exhausted from the tip of the introduction pipe 3 flows around the introduction pipe 3. The gas rises, is dispersed in the air in the gas dilution space within the main body 1 of the exhaust/drainage system, and is exhausted to the outside through the openings of the wire mesh 5 or the shutters 7. At this time, from the tip of the introduction pipe 3 to the wire mesh 5 or the shutter 7
If the distance is set to the shortest distance l (see Figure 4) and the distance at which the hydrogen gas is diluted to 3% or less of the induced explosion production limit, fire outside the wire mesh 5 or the shutter 7 will not cause an induced explosion. .

FIG. 9 shows the results of an experiment to determine the relationship between the distance from the tip of the introduction pipe 3 to the wire mesh 5 or the shutter 7 and the hydrogen gas/oxygen gas generation current value A at the time of the induced explosion. In FIG. 9, the broken line indicates the internal structure as shown in FIG. 4, and the solid line indicates the internal structure as shown in FIG. 5. From this experimental result, for example, in the structure shown in Figure 4, 12V, 150AH battery 4
When these are combined into a collective exhaust system, a gas generation current of about 200 A will flow at the end of charging, so the distance l from the tip of the introduction pipe 3 to the wire mesh 5 or the shutter 7 will be about 95 mm.

Furthermore, as is clear from the above experimental results, when the internal partition wall 8 is provided as shown in FIG.
Compared to the one shown in Fig. 4, which does not have the same structure, the gas dispersion within the exhaust/drainage device main body 1 is promoted, and even if the external dimensions of the exhaust/drainage device main body 1 are similar, the gas generated current value at the time of detonation can be reduced. can be raised. For example, in the structure shown in FIG. 5, the distance l is approximately 80 mm when the gas generation current is 200 A, and by providing the internal partition wall 8, the external dimensions of the device can be reduced.

In addition to the structure shown in FIG.
As shown in the figure, a structure in which it is introduced from the side can be considered.

Furthermore, an example of an extra drainage structure during water replenishment is shown in Fig. 7. As shown in FIG. 7, the lower plate 9 is shaped so as to be inclined toward the drain ports 10 at each of the four corners with the bottom plate 9 centered near the tip of the introduction pipe 3. Surplus water that has flowed into the main body 1 is quickly drained to the outside.

In the embodiment of the present invention shown in FIG. 8, the main body 1 of the exhaust/drainage device has a cylindrical shape, and it is also possible to form it into a cylindrical shape like this.

In the above-mentioned embodiment, the side surface of the exhaust/drainage device main body was constructed with a wire mesh or a shutter door, but other ventilation members, such as a perforated punched resin plate, coarse synthetic fiber cloth, or glass Alternatively, it can also be constructed from a nonwoven fabric of synthetic resin fibers. Further, only a part of the side surface of the main body of the exhaust/drainage device may be made of a ventilation member such as a wire mesh, and the other part may be made of a plate-like member with no ventilation. Furthermore, the location and number of drain ports are not limited to those shown in FIG. 7, and one to several drain ports may be provided at a location not adjacent to the tip of the introduction pipe, that is, in the periphery of the bottom plate.

As described above, according to the present invention, an exhaust/drainage device installed at the end of a bulk water replenishment system has a simple structure, has anti-explosive properties, and is highly reliable without worrying about freezing in cold regions. Therefore, this kind of storage battery device itself can have excellent advantages such as being able to improve its reliability.

[Brief explanation of drawings]

Figure 1 is a longitudinal cross-sectional view showing an example of an exhaust/drainage device used in a conventional storage battery device of this type;
3 and 3 are perspective views showing an embodiment of the exhaust/drainage device used in the storage battery device of the present invention, and FIGS. 4 and 5 show the internal structure of the embodiment shown in FIGS. 3 and 4. A schematic configuration diagram showing one example; FIG. 6 is a schematic configuration diagram showing another example of the internal structure of the exhaust/drainage device used in the storage battery device of the present invention; FIG. 7A is a schematic configuration diagram showing another example of the internal structure. , FIG. 7B is a bottom view of FIG. 7A, FIG. 8 is a perspective view showing multiple embodiments of the external appearance of the exhaust/drainage device used in the storage battery device of the present invention, and FIG. 9 is the introduction in the embodiment of the present invention. FIG. 2 is a characteristic diagram showing the results of an experiment to determine the relationship between the distance from a pipe to a wire mesh, etc., and the hydrogen gas/oxygen gas generation current value A at the time when an explosion occurs. 1...Exhaust/drainage device body, 3...Introduction pipe, 5...Wire mesh, 7...Armor door.

Claims (1)

[Scope of utility model registration request] The main body of the exhaust/drainage system has a gas dilution space whose upper and lower surfaces are made of non-ventilated plates and whose side surfaces are entirely or partly made up of ventilation members such as wire mesh or shutters, and a A bulk storage battery pack comprising an introduction pipe for guiding exhaust gas, the tip of the introduction pipe being introduced into the gas dilution space and located near the bottom plate, and a drain port provided in the periphery of the bottom plate. Exhaust and drainage system for water replenishment equipment.