JPS62193058A - Liquid port plug for lead storage battery - Google Patents

Abstract

PURPOSE:To improve the liquid anti-overflow performance of a battery, by causing an electrolytic solution having entered into a liquid port plug cylinder, to flow back toward the bottom of a liquid port plug before leaking to the outside through the gas release hole of the top of the battery. CONSTITUTION:The interior of the body 1 of a liquid port plug is divided into four chambers by three anti-splash plates 3. The bottom surface 1' of the body 1 and the anti-splash plates 3 have an inclination angle of 20 deg. to the horizontal plane. Gas release openings 5 are provided at the lowermost portions of the anti-splash plates 3. The positions of the openings 5 and the directions of inclination of the anti-splash plates 3 are alternately changed right and left. An electrolytic solution having entered together with gas into the body 1 through a side gas release opening 2 is repulsed in a first space by a vertical anti-splash plate 6. Although the electrolytic solution having entered into the body 1 through an opening beside the vertical anti-splash plate 6 and a backflow opening 11 thereunder ascends through the gas release opening 5, the asend-ascending power of the solution in a second, a third and a fourth spaces falls so that the solution is caused to flow back downward. The electrolytic solution having entered into the liquid port plug is thus all caused to flow back.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a liquid outlet plug for a lead-acid battery.

BACKGROUND OF THE INVENTION Conventional liquid spout plugs as shown in FIG. 3 have been put into practical use. In the structure shown in FIG. 3, the lower end of the lid cylindrical part 12 provided integrally with the top lid 7 is brought into contact with the upper part of the main body screw cylindrical part 14 to make it airtight, so that the outer peripheral space of the cylindrical part 12 (
It is roughly divided into two rooms: a third space) and an inner space, and the inner space is separated by a partition plate 9 in the center of the cylinder.
．． It is divided into a second space. When this liquid port plug is installed and used in a lead-acid battery, most of the electrolyte that splashes up with gas from the lower opening 10 is repelled by the splash-proof plate 3, but if the opening is opened vertically. The electrolytic solution entering through the exhaust slit 5 hits the walls of the first space and the second space, and most of it is returned to the outside of the exhaust slit 5. On the other hand, the exhaust gas further passes through the lid cylinder slit 13 and is discharged to the outside from the occipital exhaust hole 8 that goes around the outside of the lid cylinder part 12 by one and a half times.

Problems that the invention aims to solve With the rapid development of the automobile industry in recent years, the compactness and weight reduction of batteries, the spread of additional equipment around the engine, and the introduction of car electronics have led to overcrowding in the engine compartment. In response to the increasing demand for liquid overflow resistance for buffteries, the demand is increasing.

In conventional liquid port plugs as shown in Figure 3, the liquid level rises due to the high temperature of the battery, and the spatial space becomes narrow due to miniaturization, which increases the play of the electrolyte due to vibration. It becomes impossible for the electrolytic solution to flow back only in the first space and the second space, and the electrolytic solution enters the lid tube slit 13 and accumulates in the third space. In this way, the electrolyte accumulated in the third space is removed by the lid cylinder part 12.
Since the second space is completely airtight, it is not possible for the gas to circulate easily, and there has been a problem in that the gas eventually leaks out from the head exhaust hole 8 along with the regas.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention divides the inside of the liquid spout plug cylinder into at least three chambers with a splash-proof plate having an inclination of 200 degrees or more with respect to the horizontal direction. In addition to partitioning, an exhaust slit is provided at the bottom of the slope, and the exhaust slit position and inclination direction of each splash-proof plate are shifted by 1800 degrees.

Effect of the Invention With the above-described configuration, the present invention allows the electrolytic solution that has entered the inside of the liquid frame to flow back toward the bottom of the liquid port plug before leaking to the outside from the head exhaust hole, thereby suppressing the hot liquid.

Embodiment FIG. 1 is a sectional view showing an embodiment of the liquid spout plug of the present invention. In FIG. 1, the liquid spout main body 1 is partitioned into four separate chambers by three flat splash-proof plates 3 formed integrally with the top lid 7 via a support 4.

At this time, the bottom wall surface 1' of the main body and the splash-proof plate 3 have an inclination of 200 degrees with respect to the horizontal direction, and the slope of the bottom part of the splash-proof plate 3 has an angle of x=y=1.6 m7. Exhaust 5 base.

A slit 5 is provided. Further, the exhaust slits 5 and the inclination directions of each splash-proof plate 3 are shifted by 1800 degrees. In addition, when the splash-proof plate 3 is fitted to the main body 1, the outer periphery of the splash-proof plate 3 other than the bottom portion forming the slit 5 is airtight by contacting the main body 1.

Most of the electrolyte that has entered the main body together with the gas through the side exhaust slit 2 of the main body 1 is transferred to the first space by the vertical splash-proof plate 6 installed in front of and opposite to the side exhaust slit 2. It bounces back inside.

Left and right side spaces of the vertical splash-proof plate 6 and lower reflux space 11
Some of the electrolyte that has entered from the 3 splash-proof plates 3 tries to rise upward through the exhaust slits 5 provided at the bottom of the slope. The force that causes the liquid to rise in space is reduced and it flows back downwards. This is because the liquid entering through the exhaust slit 6 in the first space and the second space begins to move slowly as it hits the splash-proof plate on the top of the space and is repelled downward, so the force of the liquid that acts as a vane gradually increases. Eventually, the electrolytic solution that has entered the liquid port plug will be refluxed, unable to reach the fourth space. The vibration test results of the liquid spout plug of the present invention described above are shown in FIG.

In addition, two optimal shapes and dimensions of the splash-proof plate and the exhaust space provided in a part of the splash-proof plate were determined by a vibration resistance test, and the results are shown in FIGS. 4A and 5B and FIG. 5.

In FIG. 4, both human and B cases show the hot liquid limit results depending on the combination of the number of installed flat splash-proof plates and the angle of inclination during vertical vibration. The difference between A and B is that the excitation frequency is 1
There is a difference between 0Hz and 30Hz, but this is the frequency range that has the most influence on the battery, based on the measurement results when the actual vehicle is running. From this result, it can be seen that the most appropriate inclination angle of the splash-proof plate is 20° or more and 500° or less. Regarding the use of 4 or more splash-proof plates, considering the height of the electrolyte level in this test battery, the lower part of the liquid port plug would sink below the liquid level, so it was judged to be meaningless and omitted. did.

Based on the above, it is recommended that the number of floorboards be at least 2 or more and up to 3, judging from the angle and surface height. Figure 5 shows the relationship between the dimensions of the exhaust space and the hot liquid limit, which is 1oHz when the number of splash-proof plates is 3 and the angle is 20°.

These are the hot liquid limit results when changing the exhaust dimensions in 30H2. From this result, the exhaust space dimension is 1.0 mm or more3.
5 friends or less is heavy.

Effects of the Invention As described above, the present invention provides a liquid port plug with extremely high liquid overflow resistance.

When the liquid spout plug of the present invention is used, it far exceeds the level of conventional liquid spout plugs, satisfies the high temperature fluid performance for recent batteries, and has a simple two-part structure in terms of shape. Since it is easy to mold, an extremely inexpensive liquid spout plug can be put into practical use.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a liquid spout which is an embodiment of the present invention;
The figure shows the results of a vibration test comparing the limits of vibration resistance to hot liquids between the present invention and a conventional liquid spout, Figure 3 is a cross-sectional view of the conventional liquid spout, Figures 4 A and B, and Figure 5. 2 is a diagram showing the results of a vibration test showing the splash-proof plate shape, exhaust dimensions, and hot liquid limit. 1... Body, 2... Side exhaust slit of main body, 3... Flat splash-proof plate, 5...
・Exhaust slit, 6... Vertical splash-proof plate, 11.
... Space for reflux. Name of agent: Patent attorney Toshio Nakao and one other person
Soyo Tora Tsukuda et al.

Claims (3)

[Claims] (1) The inside of the liquid spout valve cylinder is divided into at least three chambers by a splash-proof plate having an inclination of 20 degrees or more with respect to the horizontal direction, and an exhaust slit is provided at the bottom of the slope. A liquid spout plug for a lead-acid battery, characterized in that the exhaust slit position and the inclination direction of the plate are shifted by 180 degrees. (2) A liquid spout plug for a lead-acid battery according to claim 1, wherein the lowest splash-proof plate is provided with a vertical splash-proof plate that faces the exhaust slit provided in the vertical direction of the cylinder of the liquid spout body. . (3) The exhaust slit of the horizontal splash-proof plate for the partition and the exhaust space at the bottom of the vertical splash-proof plate provided at the position corresponding to the exhaust slit of the main body each have a spatial space of 1.0 mm or more and 3.5 mm or less. A liquid spout plug for a lead-acid battery according to claim 1 or 2, characterized in that: