JPH11135103A - Filler and vent plug for storage battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filler and vent plug for a storage battery with high electrolyte overflow resistance. SOLUTION: An elevating cylinder 16 is vertically slidably assembled within a specified range in a cylindrical filler and vent plug main body 15, in which a gas vent hole 8 is formed at the top and bottom is opened. A spray arrester 7 is assembled in a gas rising up path 1 within the elevating cylinder 16.

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 used in a storage battery such as a lead storage battery.

[0002]

2. Description of the Prior Art As shown in FIG. 4, a conventional storage battery liquid plug has a cylindrical portion 2 having a gas rising passage 1 inside, a bottom portion 3 for closing a lower end of the cylindrical portion 2, and an upper portion of the cylindrical portion 2. , A cylindrical explosion-proof filter 6 incorporated in the upper part of the cylindrical body 5, and a lower part in the cylindrical body 5. The anti-splash means 7 is mainly configured.

[0003] An exhaust hole 8 is provided at the top 4 of the cylindrical body 5, and a first ventilation hole 9 is provided in the cylindrical part 2 below the explosion-proof filter 6 adjacent to the bottom 3. The second ventilation hole 10 is spaced above the ventilation hole 9 by a required distance L.
Is provided.

The splash-proof means 7 are provided at different positions so that a plurality of inclined splash-proof plates 11 project obliquely downward from the inner wall of the cylindrical portion 2 toward the inside. When the gas rising passage 1 in the cylindrical portion 2 is lifted, the electrolyte adhering to and contacting the splash-proof plate 11 that is inclined is removed by the first ventilation hole 9.
Through the gas flow passage 1 so that gaseous electrolyte droplets rising in the gas ascending passage 1 are circulated into the cell from the second ventilation hole 10.

[0005] A male screw portion 12 is provided on the outer periphery of the cylindrical portion 2 above the position where the splash-proof means 7 is provided, for attaching the liquid port plug to the battery case lid by screw connection. This male screw part 1
A concave portion 13 is provided on the outer periphery of the cylindrical portion 2 above the cylinder 2, and a packing 14 is fitted and supported in the concave portion 13.

The function of the storage battery liquid stopper having such a structure is, for example, when vibration occurs when the storage battery is mounted on an automobile.
Alternatively, it is to prevent the electrolyte from splashing to the outside during charging and to prevent the electrolyte from overflowing (overflow) due to a rise in the liquid level due to gas generation during overcharging.

[0007]

However, in the conventional liquid stopper for a storage battery as described above, since the upper and lower portions of the tubular body 5 are integrated, the liquid level rises due to vibration and charging. The lower part of the cylindrical body 5 enters the electrolytic solution, and the distance between the first and second vent holes 9 and 10 for refluxing the electrolytic solution into the battery case and the liquid surface is shortened. There is a problem that the distance between the exhaust hole 8 for discharging the hydrogen gas inside to the outside and the liquid surface becomes short, which is disadvantageous for the overflow.

[0008] It is an object of the present invention to provide a storage battery liquid stopper with improved overflow resistance.

It is another object of the present invention to provide a storage battery liquid plug whose lower portion is automatically raised and lowered to improve overflow resistance.

Another object of the present invention is to provide a storage battery liquid port plug which does not adversely affect the second ventilation hole even when the lower portion is automatically moved up and down.

[0011]

The liquid stopper for a storage battery according to the present invention has an elevating cylinder in a required range within a cylindrical stopper body having an exhaust hole provided at an upper portion and an opened lower portion. And a splash prevention means is incorporated in the gas rising passage in the lifting cylinder.

[0012] In such a liquid stopper for a storage battery, the liquid stopper is formed separately from the liquid stopper main body and the elevating cylinder, and the elevating cylinder is slidably mounted vertically within the required range. Therefore, the elevating cylinder can be moved up and down along with the level of the electrolytic solution.

When the elevating cylinder is moved up and down with the level of the electrolytic solution as described above, the electrolyte level can always be below the elevating cylinder, and the resistance to overflow is improved. be able to. Further, even when the liquid surface vibrates up and down, the elevating and lowering cylinder body can move up and down in accordance with the vertical vibration, so that the vibration overflowing resistance can be improved.

In the liquid stopper for a storage battery according to the present invention, it is preferable that the elevating cylinder including the splash-proof means is made of an electrolyte-resistant resin having a specific gravity of 1 or less. In this way, when the liquid level of the electrolytic solution reaches the bottom of the raising / lowering cylinder due to the rise of the liquid level of the electrolytic solution, the raising / lowering cylinder floats on the liquid level of the electrolytic solution and changes in the liquid level of the electrolytic solution. Automatically goes up and down along with.

It is preferable that the liquid stopper body and the elevating cylinder are provided with retaining means for locking the elevating cylinder to the liquid stopper body at the lowermost lower limit position of the elevating cylinder. With this configuration, it is possible to prevent the elevating cylinder from falling off the liquid port plug main body.

Further, the elevating cylinder has a bottomed cylindrical shape having a cylindrical portion and a bottom portion closing a lower portion of the cylindrical portion, and the cylindrical portion has a first through hole provided adjacent to the bottom portion. A second air hole provided at a predetermined distance above the air hole and the first air hole;
It is preferable that a slit is provided in the cylindrical portion of the liquid port plug main body so as to correspond to the elevation range of the second ventilation hole of the elevating cylinder. With this configuration, even if the upper second ventilation hole rises with the rise of the elevating cylinder, the second ventilation hole is closed by the cylinder portion of the liquid stopper body. This can be prevented by the slit provided in the cylindrical portion of the main body, and the second vent can function normally.

[0017]

1 and 2 show an embodiment of a liquid stopper for a storage battery according to the present invention.

The storage battery liquid port plug is provided with a vertically movable cylinder 16 slidably up and down within a required range in a cylindrical liquid port plug body 15 having an exhaust hole 8 provided at an upper portion and an open lower portion. Thus, the gas rising passage 1 in the elevating cylinder 16 has a structure in which the splashproof means 7 is incorporated.

The liquid stopper body 15 is a cylindrical portion 1 having an open lower portion.
5a and a top 15b closing the upper end of the cylindrical portion 15a
And On the outer periphery of the cylindrical portion 15a, there is provided a male screw portion 12 for attaching the liquid port plug to the battery case lid by screw connection. A concave portion 13 is provided on the outer periphery of the cylindrical portion 15a above the male screw portion 12, and a packing 14 is fitted and supported in the concave portion 13. An exhaust hole 8 is provided at the top 15b.
Is provided.

An explosion-proof filter 6 made of ceramic is incorporated in the upper portion of the liquid stopper body 15 in the cylindrical portion 15a.

The elevating cylinder 16 includes a cylindrical portion 16a and the cylindrical portion 1a.
6a has a bottomed cylindrical shape with a bottom 16b for closing the lower part. A first ventilation hole 9 provided adjacent to the bottom portion 16b and a second ventilation hole 10 provided above the first ventilation hole 9 at a predetermined distance L above the cylinder portion 16a. Are provided. The second to the first vent 9
Are provided on the opposite side. In such an up-and-down cylinder 16, the cylinder 16 a is fitted in the cylinder 15 a of the liquid port plug main body 15 so as to be able to move up and down.

The splash-proof means 7 is provided on the cylindrical portion 16a of the elevating cylindrical body 16.
Is built in. Similar to the above-described conventional example, the splash-proof means 7 is provided at different positions vertically so that a plurality of inclined splash-proof plates 11 project obliquely downward toward the inside from the inner wall of the cylindrical portion 16a. When the electrolyte splashes rises in the gas rising passage 1 in the cylindrical portion 16a, the electrolyte comes in contact with the inclined splash-proof plate 11 and drops through the first ventilation hole 9 to fall into the cell. The gaseous electrolyte droplets which are circulated and ascending in the gas ascending passage 1 are discharged through the second vent 10
Reflux from inside the cell.

The liquid stopper body 15 and the elevating cylinder 16 are provided with retaining means 17 for locking the elevating cylinder 16 to the liquid stopper body 15 at the lowermost lower limit position of the elevating cylinder 16. The stopper means 17 includes a first stopper 17a protruding inward from a lower end of the cylindrical portion 15a of the liquid port main body 15,
A second stopper 17b protrudes from the upper outer periphery of the cylindrical portion 16a of the elevating cylinder 16 and is locked by the first stopper 17a in a lowered state.

A slit 18 is provided in the cylinder portion 15a of the liquid port plug main body 15 in a vertically long manner corresponding to a range of elevation of the second ventilation hole 10 of the elevation cylinder body 16.

In such a liquid stopper for a storage battery, the elevating cylinder 16 including the splash-proof means 7 is formed of an electrolyte-resistant synthetic resin having a specific gravity of 1 or less, for example, polypropylene or polyethylene. I have. The liquid port stopper body 15 is also formed of a synthetic resin such as polypropylene or polyethylene.

In such a storage battery liquid plug, when the liquid level of the electrolytic solution rises and the bottom 16b of the lifting / lowering cylinder 16 rides on the liquid level of the electrolytic solution, the lifting / lowering cylinder 16 is moved downward. Floating on the liquid surface. Therefore, the elevating cylinder 16 moves up and down with the level of the electrolytic solution. Therefore, the level of the electrolyte is always below the elevating cylinder 16, and the overflow resistance can be improved. In addition, when the electrolytic solution surface vibrates up and down, the elevating cylinder 16 also moves up and down along with the vibration so as to be present above the liquid surface, so that the vibration overflow resistance can be improved.

In this case, the lifting cylinder 1 including the splashproof means 7
6 is formed of an electrolyte-resistant resin having a specific gravity of 1 or less, so that the electrolyte surface rises and lowers as the electrolyte surface rises.
When it reaches the bottom 16b, the lifting cylinder 16 floats on the electrolyte surface and automatically rises and falls with the fluctuation of the electrolyte surface.

The liquid stopper body 15 and the elevating cylinder 16 are provided with retaining means 17 for locking the elevating cylinder 16 to the liquid stopper body 15 at the lowermost lower limit position of the elevating cylinder 16. Therefore, the lifting cylinder 16 can be prevented from dropping off from the liquid port plug body 15.

Further, the elevating cylinder 16 has a bottomed cylindrical shape having a cylindrical portion 16a and a bottom portion 16b for closing a lower portion of the cylindrical portion 16a. The cylindrical portion 16a is provided adjacent to the bottom portion 16b. The first vent hole 9 and the second vent hole 10 provided above the first vent hole 9 at a predetermined distance L from the first vent hole 9 are provided. 15 a is provided with a slit 18 corresponding to the range of elevation of the second ventilation hole 10 of the elevating cylinder 16, so that the upper second ventilation hole 10 rises with the elevation of the elevating cylinder 16. Even the second
The slit 18 can prevent the vent hole 10 from being closed by the cylindrical portion 15a of the liquid port plug main body 15, and the second vent hole 10 can function normally.

In order to clarify the effect of the liquid port plug for a storage battery of the present invention on the overflow resistance, the liquid port plug of the present invention having the structure shown in FIG. Conventional liquid port plugs were prepared, these liquid port plugs were attached to the battery case lid of the 46B24R type storage battery, and the lead storage battery with the liquid port plug of the present invention shown in FIG. An overcharge overflow test and a vibration overflow test were performed on a lead-acid battery equipped with a conventional liquid port stopper having a structure shown in FIG. 4 as a conventional product (vibration was performed while charging at a constant voltage of 15 V). Table 1 and FIG.
Shown in In Table 1, U.S. L indicates the upper level of the electrolytic solution in the battery case.

[0031]

[Table 1] In Table 1, the conventional product is U.S.A. Although the overflow limit is reached at 10A of L10mm, the product of the present invention is U.S.A. It overflowed with 10A of L15mm. From the above, it was found that the product of the present invention clearly had an improved overflow property. Further, in FIG. 3, it was found that the product of the present invention clearly suppressed the overflow property against vibration as compared with the conventional product.

In the above example, the elevating cylinder 16 including the splashproof means 7 is formed of an electrolytic solution-resistant synthetic resin having a specific gravity of 1 or less so that the elevating cylinder 16 floats on the electrolyte surface. The lifting cylinder 16 including the anti-spray means 7 is made without regard to specific gravity, and a float is attached to the lower portion of the lifting cylinder 16 so that the lifting cylinder 16 floats on the electrolyte surface. Can also.

[0033]

According to the present invention, the liquid stopper for a storage battery according to the present invention is formed separately from the liquid stopper main body and the elevating cylinder, and the elevating cylinder is slidably moved up and down within a required range in the liquid stopper main body. Since it is incorporated, the elevating cylinder can be moved up and down along with the level of the electrolytic solution. For this reason, the electrolyte surface can always be below the elevating cylinder, and the resistance to overflow can be improved. In addition, when the liquid surface is vibrated up and down, the elevating cylinder body can also move up and down so as to be present above the liquid surface, so that the vibration overflow resistance can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an example of an embodiment of a liquid stopper for a storage battery according to the present invention.

FIG. 2 is a perspective view showing the appearance of the storage battery liquid port plug shown in FIG.

FIG. 3 is a diagram showing the results of a vibration overflow test of a lead storage battery provided with a storage battery liquid stopper according to the present invention and a conventional lead storage battery provided with a storage battery liquid stopper.

FIG. 4 is a longitudinal sectional view of a conventional liquid stopper for a storage battery.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gas rising passage 2 Tube part 3 Bottom part 4 Top part 5 Cylindrical body 6 Explosion-proof filter 7 Splash-proof means 8 Exhaust hole 9 First ventilation hole 10 Second ventilation hole 11 Inclined splash-proof plate 12 Male screw part 13 Depression 14 Packing 15 Liquid stopper body 15a Cylindrical part 15b Top 16 Elevating cylindrical body 16a Cylindrical part 16b Bottom part 17 Retaining means 17a First stopper 17b Second stopper 18 Slit

Claims (4)

[Claims] An elevating cylinder is vertically slidably mounted within a cylindrical liquid port plug body having an upper portion provided with an exhaust hole and an opening at a lower portion, so that gas rises in the elevating cylinder. A liquid port plug for a storage battery, wherein a splash-proof means is incorporated in a passage. 2. The lifting cylinder including the splash-proof means,
The liquid port stopper for a storage battery according to claim 1, wherein the liquid port plug is formed of an electrolyte-resistant resin having a specific gravity of 1 or less. 3. The liquid stopper body and the elevating cylinder are provided with retaining means for locking the elevating cylinder to the liquid stopper body at a lowermost lower limit position of the elevating cylinder. The liquid port stopper for a storage battery according to claim 1 or 2, wherein: 4. The lifting cylinder has a bottomed tubular shape having a tubular portion and a bottom portion closing a lower portion of the tubular portion, and a first portion provided adjacent to the bottom portion in the tubular portion. Vent and the first
And a second ventilation hole provided at a predetermined distance above the ventilation hole of the liquid port stopper body, and a cylindrical portion of the liquid port plug main body has an ascending / descending range of the second ventilation hole of the elevating cylinder. 3. A slit is provided correspondingly to (1).
Or the liquid port stopper for a storage battery according to 3.