JP2015225788A - Lead storage battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lead storage battery that prevents an electrolyte from being leaked outside by absorbing it all even when a lot of electrolyte is leaked into an exhaust chamber of the lead storage battery.SOLUTION: By folding a liquid-absorbing material formed by punching out into a size larger than a predetermined size into a predetermined size, and disposing it in an exhaust chamber, formed with an exhaust valve of a lead storage battery, covered by a lid, even when an electrolyte leaked through the exhaust valve during use of the lead storage battery becomes a lot, the whole of it may be absorbed and the leaked electrolyte is prevented from being leaked outside.

Description

The present invention relates to a lead-acid battery having an exhaust chamber in which an exhaust valve is formed.

An electrode plate group consisting of positive and negative electrode plates and a separator is housed in the battery case, and an electrolyte solution to the extent that the electrode plate group is impregnated is injected, an exhaust chamber is provided in the lid, and an exhaust valve is formed in the exhaust chamber. A lead storage battery in which the battery case is covered with a lid and the exhaust chamber is covered with a cover lid is known.

Such a lead-acid battery prevents an excessive increase in internal pressure by operating the exhaust valve to dissipate the internal pressure to the outside when the internal pressure of the battery case increases due to overcharge or the like. At the same time, the electrolyte may leak and leak outside.

As a method for solving these problems, it is known to dispose a liquid absorbing material around an exhaust port having an exhaust valve (Patent Document 1). Furthermore, Patent Document 1 also describes that a liquid-absorbing resin was molded in order to increase the amount of water absorption.

JP-A-2-170345

There are a wide variety of lead acid batteries, and there are many different things such as sizes and shapes. Along with this diversification, the shape of the exhaust chamber in which the exhaust valve is formed is also diverse, and it is bothersome and economically disadvantageous to prepare a dedicated liquid absorbent material by molding each time. There are many cases where materials are obtained. The punching in this case is to obtain a desired shape from a large flat plate-like liquid absorbing material, but when increasing the amount of liquid absorption, it should be the same size as the floor area of the exhaust chamber and the liquid absorbing material It can be considered to increase the thickness. Although it is easy to make it the same size as the floor area, it is still necessary to increase the thickness if the amount of liquid absorption is to be increased. However, this is also troublesome and economically disadvantageous because a thick liquid-absorbing material dedicated to the lead storage battery to be used must be manufactured. As a means for solving this problem, it is conceivable to stack a number of liquid absorbing materials having the same thickness, but the work of applying the liquid absorbing material to the exhaust chamber is not necessary once and is troublesome.

The present invention solves these problems, and the liquid absorbing material is bent and disposed in the exhaust chamber.

Since the liquid absorbing material is bent in this way, it is easy to place a large amount of liquid absorbing material in the exhaust chamber, the amount of liquid absorption can be increased, and many liquid absorbing materials are stacked. There is no annoyance. Further, when the liquid absorbing material is arranged along the side surface from the bottom surface of the exhaust chamber, the work of covering the top surface of the exhaust chamber is good.

According to the present invention, it is easy to dispose a large amount of liquid absorbing material in the exhaust chamber, and when the liquid absorbing material is bent along the side surface from the bottom surface of the exhaust chamber, the operation of covering the cover is good. It has the effect of becoming.

It is a principal part disassembled perspective view for demonstrating this invention embodiment. It is a perspective view explaining the other bending method of a liquid absorbing material.

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an exploded perspective view of an essential part for explaining an embodiment of the present invention. In the drawings, 1 is a lead storage battery, 2 is a battery case, 3 is a lid, 4 is a cover lid, and 5 is a positive / negative terminal of the lead storage battery 1. The battery case is formed in a box shape with an open upper surface, and the inside thereof is partitioned into a plurality of cell chambers by partition walls, and each cell chamber has a group of electrode plates in which a plurality of positive and negative electrode plates are alternately stacked via separators. The electrode plate groups in the cell chambers are connected in series and connected to the positive and negative terminals 5 formed to protrude outside the battery case 2. The lid 3 is applied to the upper surface of the battery case 2 to close the upper surface of the battery case 2 and opens the cell chamber between the cell chambers. The lid 3 is formed with an exhaust chamber 31 which is recessed on the upper surface thereof. The exhaust chamber 31 may be provided individually corresponding to the cell chamber of the battery case 2, or may be a single large exhaust chamber. The illustrated one shows an example in which an exhaust chamber 31 common to two cell chambers is formed. The exhaust chamber 31 is formed with two hollow exhaust cylinders that penetrate the bottom surface of the exhaust chamber 31 so as to communicate with the respective cell chambers. Each of the exhaust cylinders has a cap-like shape that covers the upper opening of the exhaust cylinder. The exhaust valve 32 is formed by applying rubber. The exhaust valve 32 prevents the pressure in the cell chamber from becoming excessively high by opening the rubber when the pressure in the cell chamber increases and releasing the pressure from the exhaust chamber to the outside. In the manufacture of lead-acid batteries, an electrolytic solution made of dilute sulfuric acid is usually poured into each cell chamber using the exhaust tube before applying cap-shaped rubber to the exhaust tube. Liquid. The amount is such an amount that it is impregnated in the accommodated electrode plate group, or a little more than that amount.

The liquid absorbing material 6 is disposed in the exhaust chamber 31 in which the exhaust valve 32 is formed so as to avoid the exhaust valve 32. In the present invention, the liquid absorbing material 6 is bent and disposed. What is shown in FIG. 1 is a flat liquid-absorbing material 6 punched to a size twice as large as a predetermined size in a lateral direction, and is folded so as to be folded left and right at a portion indicated by a dotted line. The semicircular cutouts 61 formed at both end edges of the liquid absorbing material 6 are arranged such that when the liquid absorbing material 6 is disposed in the exhaust chamber 31, the exhaust valve 32 penetrates through the cutout 61 and the liquid absorbing material. 6 is to avoid the interference with the exhaust valve 32 and to be disposed on the bottom surface of the exhaust chamber 31.

As described above, in the present invention, the liquid absorbing material 6 can be easily bent to increase the amount of the liquid absorbing material 6 so that a large amount of the electrolyte leaked into the exhaust chamber 31 can be absorbed. The electrolyte solution can be prevented from leaking out of the lead storage battery from the exhaust chamber 31.

After the liquid absorbing material 6 is arranged in the exhaust chamber 31, the flat cover 4 covering the exhaust chamber 31 is placed on the upper surface of the lid 3 to cover it. At this time, the cover 4 is covered so as not to touch the exhaust valve 32, and a gap is formed between the cover 3 and the cover 4 so that the pressure is released to the outside. In the figure, reference numeral 33 denotes a protrusion formed on the upper surface of the lid, and the cover 4 is applied thereon by ultrasonic fusion or the like.

The liquid absorbing material 6 accommodated in the exhaust chamber 31 is, for example, a paper-like material made of synthetic pulp and inorganic (for example, glass) powder, and can easily obtain a desired shape by punching. It can be folded.

The liquid absorbing material 6 is not limited to the above, and can take various forms as shown in FIG. FIG. 2 (a) shows the liquid absorbing material 6 punched into a size slightly wider than a predetermined size, and the side portion of the width is bent by 90 ° at the dotted line. When the liquid absorbing material 6 formed in this way is disposed in the exhaust chamber 31 of the lead storage battery shown in FIG. 1, the bottom surface thereof is placed on the bottom surface of the exhaust chamber 31 and the side portion bent by 90 ° is the side surface of the exhaust chamber 31. Arranged against the wall. In FIG. 2B, unlike the case of FIG. 1, the liquid-absorbing material 6 is formed in a double size in the direction of its end, and is folded and overlapped at the dotted line. FIG. 2 (c) shows that the central length between the notches 61 formed at both ends of the liquid absorbing material is longer than a predetermined length, the central dotted line portion is valley-folded, and the alternate long and short dashed line portion. Is folded and bent to form a mountain shape in the center.

In either case, the amount of the liquid absorbing material stored in the exhaust chamber is increased, so that a larger amount of the electrolyte leaked into the exhaust chamber can be absorbed.

In particular, in the case of the liquid absorbing material arranged from the bottom surface of the exhaust chamber to the side wall surface by bending the side portion shown in FIG. 2A by 90 °, the liquid absorbing material arranged in the exhaust chamber may float. Therefore, it is preferable to attach the cover that covers the upper surface of the exhaust chamber.

1 Lead Acid Battery 2 Battery Case 3 Lid 31 Exhaust Chamber 32 Exhaust Valve 4 Cover Lid 5 Terminal 6 Liquid Absorbing Material

Claims (2)

A lead-acid battery, wherein a single liquid-absorbing material is disposed in an exhaust chamber formed with an exhaust valve and covered with a cover.   The lead-acid battery according to claim 1, wherein a single liquid-absorbing material bent from the bottom surface of the exhaust chamber along the side surface of the exhaust chamber is disposed.

Images