JPH0945305A - Vent plug for lead-acid battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid vent plug which is excellent in liquid leakage resistance performance and is low in height by arranging diametrically different splash-proof cylinders having slits in a plurality in a concentrically circular shape on the reverse side of a vent plug body upper surface cover, and arranging a conical lower cover on the lower ends of the splash-proof cylinders by displacing the adjacent slits in the horizontal direction. SOLUTION: A liquid vent plug main body inside surface is formed of a liquid vent plug body upper surface cover 1 where an exhaust hole 5 is formed in a central part and a conical lower cover 6 of a liquid vent plug. This inside space is partitioned into four spaces in a concentrically circular shape by diametrically different three suspending cylinders 2, 2' and 2" having respectively slits 3 arranged on the reverse side of an upper surface cover, and positions of the gas vent-reflux slits 3 of the adjacent suspending cylinders 2 and 2', 2' and 2" are displaced by 180 degrees in the horizontal direction. Therefore, even if an under head dimension H of the liquid vent plug is lowered more than a conventional one, electrolyte entering a main body cylinder part can be refluxed without leaking it outside from the exhaust hole 5, and an overflow of liquid can be restrained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of a liquid outlet plug of a lead storage battery.

[0002]

2. Description of the Related Art As a conventional liquid spout, for example, a liquid spout having a structure shown in FIG. 5 has been put into practical use. The internal structure shown in FIG. 5 is obtained by combining a main body tubular portion (12) and a splash-proof main body (9) having a plurality of splash-proof plates (10) integrally formed with a column (11). I am united. That is, the gas flowing into the main body tubular part (12) from the slit (3) for degassing and circulating provided in the lower part of the main body tubular part (12) rises inside the main body tubular part, and the liquid port plug upper lid Although it is discharged from the exhaust hole (5) of (1), diluted sulfuric acid that is an electrolytic solution is mixed in the gas that has flowed into the main body cylindrical portion (12), and the gas for trapping and refluxing the diluted sulfuric acid is used. Splash-proof plates (10) are arranged in the upper and lower stairway mazes. Theoretically, the larger the number of splash-proof plates (the more complicated the maze), the more the splash-proof effect increases, but the molding die becomes complicated and the maximum external dimension (height) also increases. The number of splash proof plates is designed by experiment.

[0003]

Recent automotive designs have been designed to improve slant. No
Since the inside of the engine room has become overcrowded,
The demand for low-profile storage batteries is increasing. A conventional liquid spout as shown in FIG. 5 is provided with a plurality of splash-proof plates in the vertical direction inside the main body, and captures dilute sulfuric acid, which is the electrolytic solution that has flowed in along with the gas, and recirculates it to the original position. It keeps the overflow resistance from the exhaust hole of the lid on the spout. When the amount of electrolyte is secured in order to reduce the size of the storage battery and maintain the performance of the storage battery. In the structure of the liquid mouth plug shown in Fig. 5, the lower end of the liquid mouth plug is exposed to the electrolytic solution, so that the liquid mouth plug space is also electrolyzed. There is a problem that the electrolyte is filled with the liquid, the electrolyte cannot be refluxed, and the electrolyte overflows together with the gas.

[0004]

In order to solve the above-mentioned problems, the present invention has a concentric diameter having a slit for venting and circulating gas on the back side of a liquid port plug upper lid having an exhaust hole formed in a central portion. Different splash-proof cylinders are provided, and the slit positions of adjacent splash-proof cylinders are displaced 180 degrees with respect to the horizontal direction, and the conical lower lid is integrated at the lower end of each splash-proof cylinder. As a result, even if the liquid port plug is made low-profile, the electrolytic solution that has entered the main body cylinder part can be returned to the original flow through the exhaust hole of the upper lid of the liquid port plug without being overflowed to the outside. The liquid can be suppressed.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the first embodiment will be described.
The liquid spout of the invention described in 1. will be described.

In FIG. 1, the inner space of the liquid mouth plug body formed by the upper lid 1 of the liquid mouth plug body, the screw portion 4 and the conical lower lid 6 of the liquid mouth plug body has three hanging cylinders 2 having different diameters 2. 2 ',
It is divided into 4 spaces by 2 ", and the positions of the degassing and recirculation slits (3) of the adjacent hanging cylinders (2 and 2 ', 2'and 2") are horizontally displaced by 180 degrees. The under neck size (H) is 14 mm, which is 10 mm lower than the conventional structure.

Further, the invention according to claim 2 can be made a storm-proof type liquid stopper by providing a storm-proof filter (8) below the exhaust hole as shown in FIG.

FIGS. 2 and 4 show the conical lower lid of the liquid spout plug body in order to clearly show the positions of the gas vent and reflux slits (3) of the liquid spout plug of the inventions of claims 1 and 2, respectively. It is an imaginary figure of a downward view in the state which excluded 6).

A vibration-resistant overflow performance test was conducted on the liquid spout of the invention described in claim 1 and the liquid spigot of the conventional structure shown in FIG. In the test, two fully-charged 80D26L type automobile batteries were prepared, and the liquid level of each battery was adjusted to a position 20 mm lower than the battery upper surface, and one battery had the liquid spout of the invention according to claim 1. Attach 6 pieces to the other battery, 6 pieces of liquid mouth plugs of the conventional structure, and attach to the vibration device to change the frequency from 5Hz to 10Hz.
The value was increased by HZ, oscillated for 10 minutes in each lap, the acceleration of vibration was increased (amplitude was increased) within 10 minutes, and the acceleration of vibration when overflowed was evaluated. (Constant voltage charging was continued at 14.4V during the test) The test results are shown in FIG. As is clear from the test results, the vibration overflow performance was superior to that of the conventional liquid spout.

[0010]

The liquid spout of the present invention has a spout-proof cylinder having different diameters of concentric circles having slits for gas venting and recirculation on the back side of the upper lid of the liquid spout having an exhaust hole formed in the central portion. If multiple slits are provided and the slits of adjacent splashproof cylinders are displaced 180 degrees with respect to the horizontal direction, and the conical lower lid is integrated with the lower end of each splashproof cylinder, Even if the mouth plug is made low-profile, the electrolyte that has entered the cylinder of the main body can be returned to the original without leaking to the outside through the exhaust hole of the lid of the liquid mouth plug body, so that the overflow can be suppressed. If you install a storm filter. It is possible to obtain a low-profile anti-explosion type liquid spout having excellent overflow resistance. In the present invention, “180 degree displacement” does not mean 180 ± 0 degree displacement, but means that the position of the slit is provided on the back surface side. By doing so, it is possible to effectively capture the dilute sulfuric acid that is the electrolytic solution that has flown into the liquid port stopper together with the gas.

Further, since the structure is lower (smaller) and simpler than that of the conventional structure, the molding die is inexpensive, and thus an inexpensive liquid spout can be provided.

[Brief description of drawings]

FIG. 1 shows a sectional view of a liquid spout according to the present invention as set forth in claim 1.

FIG. 2 shows an imaginary view of the liquid spout according to the invention as claimed in claim 1 as seen from below, excluding the conical lower lid of the liquid spout.

FIG. 3 shows a sectional view of a liquid spout according to the present invention as set forth in claim 2.

FIG. 4 shows an imaginary view of the liquid mouth plug according to the present invention as defined in claim 2 as seen from below, excluding the conical lower lid of the liquid mouth plug.

FIG. 5 shows a cross-sectional view of a conventional liquid spout.

FIG. 6 is a vibration-resistant overflow performance test result of the liquid spout of the present invention according to claim 1 and a conventional liquid spout.

[Explanation of symbols]

 1 Liquid mouth plug upper surface lid 2 Hanging cylinder 3 Gas vent and recirculation slit 4 Screw part 5 Exhaust hole 6 Liquid mouth plug Conical lower lid 7 Rubber packing 8 Anti-storm filter 9 Splash-proof body 10 Splash plate 11 Strut 12 Body tube Part H Under neck size

Claims (2)

[Claims] 1. A plurality of concentric circles having different diameters of concentric circles having slits for gas venting and refluxing are provided on the back side of a liquid port stopper upper lid having an exhaust hole formed in a central portion thereof, and adjoining splashproof tubes are provided. A lead-acid battery liquid spout plug characterized in that the position of the cylinder slit is displaced by 180 degrees with respect to the horizontal direction, and a conical lower lid is provided at the lower end of each of the plurality of splash-proof cylinders. 2. The liquid spout for lead acid battery according to claim 1, wherein an explosion-proof filter made of an inorganic material or a resin is provided inside the upper lid of the liquid spout.