JPS60112250A - Sealed lead storage battery - Google Patents

Abstract

PURPOSE:To enable pouring of electrolyte to be rapidly performed and improve the rapid discharge performance of a sealed lead storage battery by placing between the plates, retainers impregnated with electrolyte and sheet-like conductive members each formed by joining two or three pieces of thin paper and having many internal spaces. CONSTITUTION:Each retainer 4 composed of fine glass fiber or similar material is placed between a positive and a negative plate 3 and 2. Plate-like liquid permeable members 5 composed of cellulose alone are placed between the retainer 4 and the negative plate 2 as well as between the retainer 4 and the positive plate 3. Each plate-like liquid permeable member 5 is formed by superimposing two thin pieces 6 and 6 of paper composed of cellulose before they are joined at many spots located apart from each other. Therefore the plate-like members have many internal spaces 7 and 7. As a result, it is possible to perform rapid pouring of electrolyte and to improve the electrolyte-holding ability of the sealed lead storage battery. Consequently it is possible to achieve a sufficient rapid-discharge performance even at low temperatures.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a sealed lead acid battery.

PRIOR TECHNOLOGY In general, in this type of battery, the liquid is made non-fluid, and the slag generated from the anode plate during charging is
The gas is absorbed by the spongy lead of the cathode plate active material in the reaction shown in the equation below.

Pb+1/202+H,,So4→PbSO4+H20 In this type of battery, the electrolyte decomposed on the anode plate generates 1'2o on the cathode plate according to the above formula, so there is no need to retain water when using the battery. Moreover, there is no need to worry about electrolyte leakage even if the device is tilted in the direction in which it is tilted.

In this type of battery, for example, fine glass fibers are formed into a man-shaped shape and the retainer is impregnated with electrolyte by placing the retainer together with the electrode plates in the battery case and then injecting the electrolyte into the battery case. When injecting the electrolyte into the retainer located between the electrode plates arranged in the battery case,
Since the electrolyte gradually impregnates from the end of the retainer,
There was a drawback that it took an extremely long time to prepare the juice.

OBJECTS OF THE INVENTION An object of the present invention is to provide a sealed lead-acid battery in which an electrolytic solution can be rapidly poured into a retainer and rapid discharge resistance can be improved.

Structure of the Invention The present invention is an electric! It! This is a sealed lead-acid battery in which a retainer impregnated with J and a sheet-like liquid guide member formed by stacking and bonding a plurality of thin papers to form a large number of gaps between electrode plates are arranged between electrode plates.

With the above configuration, the stored liquid injected into the battery case quickly penetrates into the liquid guiding member and roughly penetrates into the retainer which is in surface contact with the liquid guiding member, so that the liquid stored in the battery case penetrates into the retainer which is in surface contact with the liquid guiding member. Electrolyte solution can be injected quickly.

EXAMPLES Hereinafter, embodiments of the present invention will be explained in detail with reference to the illustrated embodiments.

In Figures 1 and 3, 1 is a battery case, 2 is a cathode plate, and 3
is the anode plate. A retainer 3 made of fine glass fibers or the like is arranged between the cathode plate 2 and anode plate 3, and the space between the retainer 4 and the cathode plate 2 and between the retainer 4 and the anode plate 3 is 100%. A plate-shaped liquid guide member 5 made of cellulose is arranged. This liquid guiding 81 day 25 is shown in Figure 2.
．． 6 are stacked on top of each other and joined at a large number of locations (A) at intervals, thereby creating a large number of gaps 7, 7.6 inside. ... was formed. In the example, the thin paper was 10
Using a material with a thickness of a few minutes, the joint part (A part) is approximately 2.
As the size of mΦ, as shown in Fig. 3, the distance @C3 between each joint part (A part) is about 10 m, and the conduction @l! L material 5 (f4 was formed. Using this liquid conduction material 4, a sealed lead-acid battery with a 5-hour rate capacity of 32Ah was manufactured, and the time required for pouring the electrolyte was compared with that of a conventional similar battery. The electric f1!IA has 8 j9M members with a thickness of 0.4 mm when no load is interposed between the electrode plate and the retainer, and the 16 liquid guide members of the same size are interposed between the electrode plate and the retainer. Battery B interposed between
However, when we measured the time required to inject the electrolyte with respect to the conventional battery C that does not use the liquid guide part 44, the results shown in the table below are 1.
! ! tc, in this case the retainer is 10 with a diameter of approximately 0.7μ
Made of 0% glass fiber, thickness x width x height 1.6m
A diluted 5A acid having a J ratio of 1.310 was used as an electrolytic solution and injected at a temperature of 25°C.

As a result, it was found that battery B required the shortest time to fill the electrolyte and was capable of pouring a large amount of electrolyte.

Next, after fully charging the batteries A, B, and C, leave them at -15°C for 11 questions, and then rapidly discharge the batteries at 150A. Electrical properties were tested. As a result, the discharge time is
As shown in FIG. 4, the battery life is approximately 3 minutes, battery B is approximately 3 minutes and 30 seconds, and battery C is approximately 2 minutes and 30 seconds. It has become clear that the battery is superior to conventional batteries.

As is clear from the above example, when a sheet-like liquid guide member with interspersed gaps inside is provided, the gaps improve gas release during injection of electrolyte, thereby increasing the injection time of electrolyte. In addition, by interposing the liquid guiding member between the electrode plate and the retainer, it is possible to improve the escape of O2 gas generated from the anode plate during charging. In addition, the above-mentioned liquid guiding member has an excellent ability to hold electrolyte, so it can increase the amount of electrolyte, and as a result, it supplies hydrogen ions necessary for rapid discharge reactions at low temperatures, especially for discharge reactions at the anode plate. By sufficiently carrying out this process, it is possible to suppress the increase in polarization due to the accumulation of solid matter, which is considered as a discharge intermediate, and it is possible to improve the discharge capacity.

Effects of the Invention As described above, according to the present invention, since the retainer and the liquid guiding member having a plurality of gaps are arranged between the polar plates of different polarities, the electrolyte can be poured quickly and selectively. This has the advantage of improving production efficiency. Moreover, by providing the right liquid part A, the electrolyte retention capacity can be improved, so sufficient rapid discharge performance can be obtained even at low temperatures by avoiding the increase in the electrolyte opening. There are advantages.

[Brief Description of the Drawings] Figure 1 shows the electrode plate group of the sealed lead-acid battery of the present invention -t12
2 is a vertical sectional view of the sheet-shaped liquid guiding member of the lead-acid battery of the present invention, FIG. 3 is a partial plan view of the sheet-shaped liquid guiding member,
FIG. 4 is a graph showing test results of rapid discharge characteristics of batteries A and B according to the present invention and conventional battery C.

Claims (1)

[Claims] Layer the retainer impregnated with electrolyte and multiple pieces of thin paper 1! 1. A sealed lead-acid battery characterized in that a sheet-like liquid guiding member, which is bonded to form a large number of gaps therebetween, is disposed between electrode plates.