JPH0430711B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a liquid spout 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. The structure in Figure 3 is
The lower end of the lid cylinder part 12 provided integrally with the top lid 7 is brought into contact with the upper part of the main body threaded cylinder part 14 to make it airtight, thereby creating two chambers: an outer space (third space) and an inner space of the cylinder part 12. The inner space is further divided into a first space on the left and right, a second space on the left and right by a partition plate 9 in the center of the cylinder part.
It is divided into spaces. When this liquid port plug is installed and used in a lead-acid battery, most of the electrolyte that splashes up from the lower opening 10 along with the gas is repelled by the splash-proof plate 3, but the exhaust slit 5 opened in the vertical direction The electrolyte that has entered further is in the first space and in the second space.
The air hits the wall in the 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 tube slit 13 and is discharged to the outside from the occipital exhaust hole 8 that extends halfway around the outside of the lid tube portion 12.

Problems to be Solved by the Invention With the remarkable development of the automobile industry in recent years, the overcrowding in the engine room has been addressed by making batteries smaller and lighter, spreading additional equipment around the engine, and introducing car electronics. As a result, the demands on batteries for leakage resistance are becoming higher and higher.

In the conventional liquid port plug as shown in Fig. 3,
The liquid level rises due to the phenomenon of high temperature of the battery,
Due to miniaturization, the spatial space becomes narrower, and electrolyte scattering and play due to vibration become active. Therefore, it is no longer possible for the electrolyte to flow back into the battery case only in the first and second spaces. 13
The electrolyte will accumulate in the third space. The electrolytic solution accumulated in the third space in this way is completely airtight from the first and second spaces by the lid tube part 12 except for the lid tube slit 13, so it easily flows back into the battery case. However, there was a problem that the gas would eventually leak out together with the gas exhausted from the head exhaust hole 8.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides at least a plurality of flat splash-proof plates having an inclination of 20 degrees or more with respect to the horizontal direction inside the liquid port stopper cylinder. In addition to partitioning into three or more rooms, an exhaust slit is provided at the bottom of the slope of the splash-proof plate, and the exhaust slit position and inclination direction of each splash-proof plate are shifted by 180 degrees.

Effect The present invention has the above-described configuration, so that the electrolytic solution that has entered the inside of the liquid port cylinder is easily refluxed toward the bottom of the liquid port plug before it leaks out from the head exhaust hole together with the gas. This can prevent liquid from spilling out of the stopper.

Embodiment FIG. 1 is a sectional view showing an embodiment of the liquid spout plug of the present invention. In FIG. 1, the interior of the cylindrical portion of the liquid spout body 1 is large due to the three flat splash-proof plates 3 integrally formed with the top lid 7 via the support 4. It is divided into rooms. At this time,
The bottom wall surface 1' of the main body and each flat splash-proof plate 3 have an inclination of 20 degrees with respect to the horizontal direction, and the bottommost position of the slope of each splash-proof plate 3 has a dimension with respect to the inner wall of the cylindrical part. An exhaust slit 5 with x=y=1.5 mm is provided. Further, the splash-proof plates 3 arranged in the vertical direction are arranged in a staggered manner with the exhaust slits 5 and their inclination directions shifted by 180 degrees. Note that when the splash-proof plate 3 is fitted into the cylindrical portion of the main body 1, the outer periphery of the splash-proof plate 3 other than the bottom position forming the slit 5 is the same as that of the main body 1.
It has airtightness due to contact with.

Most of the electrolyte that has entered the main body together with the gas from 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 the side exhaust slit 2. It bounces back inside.

A small amount of electrolyte that entered the cylinder from the left and right side spaces of the vertical splash-proof plate 6 and the lower reflux space 11,
It attempts to rise upward through the exhaust slit 5 provided at the bottom of the slope of the three flat splash-proof plates 3, but the splash-proof plates are removed in the second space, the third space, and the fourth space. The force of the liquid hitting the lower surface and the inner wall of the cylindrical part is suppressed, and the liquid flows back downward. This is because the liquid that enters the first space and the second space through the exhaust slit 5 first hits the lower surface of the splash-proof plate that forms the top of the space and is repelled downward, so the force of the liquid trying to rise is reduced. The electrolytic solution gradually melts down and eventually cannot reach the fourth space, and all of the electrolytic solution that has entered the cylindrical portion of the liquid port plug is refluxed. The vibration test results of the liquid port plug of the present invention described above are shown in FIG.

In addition, the optimal shape and dimensions of the plurality of splash-proof plates and the exhaust space provided at the bottom of the splash-proof plates were determined through a vibration resistance test. The results are shown in Figure 4 A and B.
and shown in FIG.

Figures 4A and 4B both show the results of the overflow limit 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 10Hz and 30Hz, and this is the frequency range that has the most influence on the battery, according to measurement results when the vehicle is running. From this result, it can be seen that the most appropriate angle of inclination of the splash-proof plate is 20° or more and 50° or less. In addition, for four or more splash-proof plates, the length of the cylindrical part needs to be longer, and considering the height of the battery electrolyte level for this test, the lower part of the liquid outlet plug may sink below the liquid level. , was omitted because it was judged to be an excessive number of installations. From the above, it is preferable that the number of flat splash-proof plates is at least 2 or more and up to 3, judging from the inclination angle and the liquid level height. Figure 5 shows the relationship between the dimensions of the exhaust space of the exhaust slit and the liquid overflow limit.
These are the results of the overflow limit when the inclination angle is 20° and the exhaust dimensions are changed at 10Hz and 30Hz. From this result, the exhaust space dimensions x and y are 1.0 mm or more and 3.5 mm.
The following are desirable.

Effects of the Invention As described above, according to the present invention, a liquid spout plug with extremely high liquid overflow resistance is provided.

When the liquid port plug of the present invention is used, it can satisfy the high liquid overflow resistance performance for batteries of recent years, far exceeding the level of conventional liquid port plugs. Furthermore, it has a simple structure of two parts: the liquid spout body and the splash-proof plate integrated with the top lid, and can be easily molded with synthetic resin, making it an extremely inexpensive liquid spout plug. It can be put into practical use.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a liquid spout which is an embodiment of the present invention, Fig. 2 is a diagram showing the results of a vibration test comparing the vibration overflow limit of the present invention and a conventional liquid spout;
The figures are cross-sectional views of conventional liquid port plugs, Figures 4A and B, and Figure 5.
The figure shows the results of a vibration test showing the shape of the splash-proof plate, the exhaust dimensions, and the overflow limit. 1...Main body, 2...Side exhaust slit of main body, 3...Flat splash-proof plate, 5...Exhaust slit, 6...Vertical splash-proof plate, 11...Recirculation space.

Claims (1)

[Scope of Claims] 1. The inside of the liquid port stopper cylinder is partitioned into at least three or more chambers by a plurality of flat splash-proof plates having an inclination of 20° or more with respect to the horizontal direction, and at the bottom of the inclination. A liquid spout plug for a lead-acid battery, characterized in that an exhaust slit is provided, and the positions and inclination directions of the exhaust slits on each splash-proof plate are shifted by 180 degrees. 2. Install the vertical splash-proof plate facing the side exhaust slit provided at the bottom of the liquid spout body in the vertical direction of the cylinder.
A liquid spout plug for a lead-acid battery according to claim 1, which is provided on the lowest splash-proof plate. 3. The liquid spout plug for a lead-acid battery according to claim 1, wherein each of the exhaust spaces of the exhaust slits provided at the bottommost position of the splash-proof plate is 1.0 mm or more and 3.5 mm or less.