JP2002313304A - Liquid plug for use in storage battery and storage battery furnished with it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid plug for use in a storage battery capable of reducing remaining of electrolyte droplets at a bottom cover part and the storage battery furnished with it. SOLUTION: This liquid plug for use in the storage battery furnished with a head body, a cylindrical body, a splash-proof body arranged inside of the cylindrical body and the bottom cover body arranged on a lower part of the cylindrical body constitutes its characteristic feature that the bottom cover is axially supported on the cylindrical body so as to freely move to seesaw inside of the cylindrical body. Consequently, it is possible to restrain remaining of the electrolyte droplets inside of the liquid plug and to restrain splash and outflow of electrolyte from the liquid plug better than conventionally.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage battery liquid plug and a storage battery provided with the same.

[0002]

2. Description of the Related Art A liquid port stopper for a storage battery is attached to a filling port of the storage battery, and has a function of preventing leakage of an electrolytic solution inside the storage battery and discharging gas generated inside the storage battery to the outside of the storage battery.

FIG. 1 is a cross-sectional view of an example of a liquid stopper for a storage battery, in which a head 13, a cylindrical body 14 integrally formed with the head 13, and a cylindrical body are disposed. Multiple splash bodies 12
And a bottom lid 15 fixedly arranged at the lower part of the cylindrical body. In this figure, the splashproof body 12 is formed integrally with the tubular body 14, but may be formed separately. 16
Is a small hole formed in the bottom cover 15, and 11 is a head 13
Is a small hole formed at the top of the. Usually, a screw portion (not shown) is formed on the outer peripheral portion of the head body 13 or the cylindrical body 14, and is screwed to a screw portion formed at a liquid inlet of the storage battery.

[0004] Hydrogen gas and oxygen gas generated inside the storage battery enter the storage battery liquid port plug through the small hole 16, rise up the space inside the storage battery liquid port plug, and are discharged from the small hole 11.
At the same time, the electrolyte may become a mist and enter the storage battery liquid plug together with the gas, and the splash preventive body 12 captures such an electrolyte mist to reduce the possibility that the electrolyte mist goes out of the storage battery. It is to make it. In addition, splash-proof body 12
Also has a function of preventing the electrolyte that has entered the storage battery liquid port plug through the small hole 16 due to vibration or shock from being directly scattered outside from the small hole 11.

[0005]

However, in the conventional liquid stopper for a storage battery, since the bottom cover 15 is fixedly arranged at the lower part of the cylindrical body, the liquid droplets formed by the condensation of the electrolyte mist are formed. In addition, there is a problem in that the electrolytic droplets that have entered the liquid stopper for the storage battery accumulate in the fixing portion 150 of the bottom cover 15 and scatter during replacement or maintenance of the storage battery.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a liquid stopper for a storage battery and a liquid stopper for a storage battery capable of reducing the retention of electrolytic droplets on a bottom cover. The object of the present invention is to provide a storage battery provided with:

[0007]

According to a first aspect of the present invention, there is provided a head body, a tubular body, a splash-proof body disposed inside the tubular body, and a lower body disposed below the tubular body. And a bottom lid, wherein the bottom lid is pivotally supported by the tubular body so that a seesaw movement is possible inside the tubular body. It is a liquid mouth stopper.

In a second aspect of the present invention, the bottom cover has an upper surface formed as an inclined surface descending toward both front ends where the shaft support is at the top and the seesaw movement is performed. A liquid stopper for a storage battery according to the first invention.

A third invention is a storage battery provided with the storage battery liquid port plug according to the first invention or the second invention.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to a first aspect of the present invention, as shown in FIG. Splashproof body 12
And a bottom lid 25 disposed below the cylindrical body 14,
The bottom cover 25 is characterized in that it is pivotally supported by the tubular body 14 so that the seesaw movement can be performed inside the tubular body 14. Reference numeral 26 denotes the shaft support. FIG. 2 (B)
2A shows a cross section including the bottom cover 25 of FIG.

According to the present invention, as shown in FIG.
Even if the droplet 27 adheres to the bottom cover 25,
3 performs a seesaw motion with the pivot 26 as a fulcrum.
As exemplified in (B), the liquid droplet does not stay in the storage battery liquid stopper. Since there is a gap between the bottom cover 25 and the cylindrical body 14, the small holes 16 in FIG. 1 need not be formed in the bottom cover 25, but may be provided.

The liquid port stopper for a storage battery according to the second invention is the same as the liquid port stopper for a storage battery according to the first invention, as shown in FIG.
As illustrated in FIG. 2, the top surface 351 of the bottom cover 35 has two end portions 35 that perform the seesaw motion with the shaft support 26 as the top.
It is characterized by being formed in the shape of an inclined surface descending toward 2. FIG. 4B shows a cross section including the bottom cover 35 of FIG. 4A.

According to the present invention, the electrolytic solution and the condensed liquid droplets that have entered the storage battery liquid stopper are smoothly moved out of the storage battery liquid stopper along the upper surface 351 of the bottom cover formed on the inclined surface. Can flow out. The upper surface 351 is shown in FIG.
As shown in (A), (a) and (b), depending on the shape of the liquid port stopper cylindrical body, it can be formed into a circular shape, a square shape, or any other shape. Further, the upper surface 351 may be flat as shown in FIG. 5B or may be curved as shown in FIG. The shape of the bottom cover is shown in FIG.
FIG. 5D shows a plate-like body as shown in FIGS.
5E or a hemispherical shape as shown in FIG.

A storage battery according to a third aspect of the present invention is provided with the above-described storage battery liquid stopper. According to this, a storage battery with less scattering of the electrolyte during replacement of the storage battery or maintenance is provided.

The present invention has high utility in the field of lead-acid batteries, but is not limited thereto. In addition, the size of the liquid port plug and the mounting method to the storage battery, the inclination angle of the upper surface of the bottom lid formed on the inclined surface, the method of pivoting the bottom lid to the cylindrical body, and other features other than the features of the present invention The configuration is a design item that can be appropriately selected.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG.
m, small hole 16 diameter 1.5 mm of the bottom lid, small hole 11 diameter 1.5 mm of the head, dimensions 40 mm from the bottom lid to the top of the head,
(Comprising four semi-circular plate-like splash-proof bodies 12) and (conventional example),
2A, except that the flat bottom lid 25 is configured to perform a seesaw motion about the pivot 26 as a fulcrum. The gap with the bottom cover 25 is 1 mm each, and there is no small hole in the bottom plate.
A D-size, 6-cell monoblock automotive lead-acid battery was fabricated.

These storage batteries were subjected to a vibration test simulating a car traveling on a rough road. In the test, a table with a lead-acid battery fixed to it was given a 50 mm drop by a cam motion and vibrated 30 times a minute for 1 hour continuously for 1 hour, and the electrolyte leaked from the liquid stopper was absorbed by a filter paper of known weight. After the absorption, the weight of the filter paper was measured immediately.

As a result of the test, it was confirmed that 1200 mg of the electrolytic solution per storage battery was leaked from the storage battery provided with the conventional liquid port plug, whereas the storage battery of the first embodiment of the present invention was used. Only 330 mg of the electrolyte could be confirmed to flow out of the storage battery with the plug attached thereto. From this, it can be seen that according to the first embodiment of the present invention, the amount of outflow of the electrolytic solution can be reduced to about 1/4 as compared with the use of the conventional liquid stopper.

Next, the shape of the bottom cover of the liquid spout according to the present invention was examined. An example is shown in FIG. 4A (hereinafter, a second embodiment). In the first embodiment shown in FIG. 2A, the bottom cover 25 has a flat plate shape, whereas the bottom cover 35 of the second embodiment has a shaft support 26 as a support shaft and a lower portion from the shaft. It is characterized by having an inclined surface toward.

The battery according to the second embodiment was tested under the test conditions described above. As a result, the outflow amount of the electrolyte per battery was 210 mg,
The outflow of the electrolyte was reduced to about 1/6 of the conventional product. This is because in the case of the first embodiment, it is necessary to accumulate a predetermined amount of electrolyte inside the liquid port plug 20 before the bottom lid itself starts the seesaw movement, whereas in the second embodiment In the example, it is considered that even when a small amount of the electrolytic solution enters the liquid stopper 30, the electrolytic solution easily falls on the slope of the bottom lid and returns to the inside of the storage battery.

Therefore, bottom lids of various shapes were further studied. Examples are shown in FIGS. 5A to 5E. FIG.
When the shape of the bottom lid body was inclined as shown in (C), (D), and (E), there was some variation depending on the shape. The outflow amount of the electrolytic solution per unit was about 200 mg, which was about 1/6 of the test result when the conventional product was used.

[0022]

As described above, the liquid stopper for a storage battery according to the present invention comprises a head body, a tubular body, a splashproof body disposed inside the tubular body, and a bottom cover disposed below the tubular body. The bottom cover is characterized in that the bottom lid is pivotally supported by the tubular body so as to enable seesaw movement inside the tubular body. Further, the bottom cover is characterized in that the upper surface is formed as an inclined surface having a pivot portion as a top portion and descending toward both front end portions performing a seesaw motion. This provides a storage battery liquid port plug that can reduce the retention of electrolytic droplets on the bottom lid and reduce the scattering and outflow of the electrolytic solution to the outside of the storage battery.

Further, according to the storage battery provided with these liquid port plugs, a storage battery which can reduce the scattering and outflow of the electrolytic solution to the outside of the storage battery is provided.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a liquid port stopper showing an example of the related art.

FIG. 2 is a diagram showing a first embodiment of the present invention.

FIG. 3 is a diagram showing the operation of the first embodiment of the present invention.

FIG. 4 is a diagram showing a second embodiment of the present invention.

FIG. 5 is a view showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cross section (example) of conventional liquid port plug 11 Small hole 12 Splashproof body 13 Head 14 Cylindrical body 15 Bottom cover 16 Small hole 150 Inner surface of fixed part of bottom cover 20 The present invention, the first embodiment Cross section of liquid port plug 25 Bottom lid 26 Axle support part 27 Electrolyte accumulated in liquid port plug 30 Cross section of liquid port plug according to the second embodiment of the present invention 35 Bottom lid 351 Inclined upper surface of bottom lid 352 Slope Tip that moves the seesaw of the bottom cover

Claims (3)

[Claims] 1. A storage battery liquid port plug comprising a head, a tubular body, a splashproof body disposed inside the tubular body, and a bottom cover disposed below the tubular body. Is a liquid stopper for a storage battery, which is pivotally supported by a cylindrical body so that a seesaw movement is possible inside the cylindrical body. 2. The bottom cover body according to claim 1, wherein the upper surface is formed as an inclined surface having a shaft supporting portion as a top portion and descending toward both front end portions performing a seesaw motion. The liquid port stopper for a storage battery according to item 1. 3. A storage battery comprising the storage battery liquid port plug according to claim 1.