JPS62229656A - Storage battery - Google Patents

Abstract

PURPOSE:To prevent the removal of active substances on the electrode plates and improve the permeability of bubbles, by furnishing plural wave-form ribs extending up and down with specific intervals in the lateral direction on separators which are furnished between a cathode and anodes. CONSTITUTION:A storage battery 1 is composed of a battery jar 2, a cover 3, an electrolyte 4, a cathode plate 5 and anode plates 6 arranged alternatively, and separators 7. The cathode plate 5 is made of a cathode plate grid 13 consisting of a longitudinal grid 13a and a lateral grid 13b of the cathode plate, and cathode active substances 14 filled on the grid 13. At both sides of the cathode active substance 14, separators 7 and 7 are furnished closely attached to the substance 14. The separator 7 is a plate with a dimension a little larger than the electrode plates 5 and 6, with plural waveform ribs 15 extending up and down with specific intervals on one side. The anode plates 6 and 6' are made of anode plate grids 16 and 16' consisting of anode longitudinal grids 16a, 16'a, and anode lateral grids 16b, 16'b; and anode active substances 17,17'. In such a composition, as well as preventing the removal of active substances, the permeability of bubbles can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a storage battery provided with a separator to prevent the active material of the electrode plates from falling off.

(Prior art and its problems) The isolation material of a storage battery is used to isolate the anode plate and the cathode plate so that the two plates do not come into contact with each other.

Therefore, the separator is generally an insulating material, but is made of a porous material so as not to impede the movement of ions in the electrolyte. By the way, in the case of a PJk electrode plate, for example, a lead-acid battery, the surface of a lattice-shaped lead plate is filled with an active material containing fine particles of peracid. For this reason, spaces are created between the fine particles of the peracid and the surface area that comes into contact with the electrolyte is widened.

On the other hand, the cathode plate is also formed by coating the surface of a grid-shaped lead plate with a spongy porous active material made of lead, which allows the electrolyte to penetrate well. Since the bipolar plates are constructed by simply applying a flexible active material as described above, the reaction with the electrolyte causes the active material to fall off, which is particularly likely to occur on the anode plate. Falling off of this active material from the electrode plates reduces the capacity of the storage battery and, in turn, shortens its lifespan. For this reason, as a storage battery that maintains a stable capacity over a long period of time, a technique is known from Japanese Patent Publication No. 55-500758 in which the electrode plates are sandwiched between separators to prevent the active material from falling off. In addition, the technique of providing vertical ribs on the isolation material between the electrode plates to facilitate the escape of air bubbles generated during the reaction of the active material and to prevent the active material from falling off was disclosed in Japanese Patent Application Laid-Open No. 1983-1999.
This is known from Japanese Patent No. 43433. However, as shown in FIGS. 6 and 7, this technology involves providing a plurality of ribs 15 in the vertical direction on the surface of the isolation material 7, so when mounted on a vehicle etc. that is subject to large vibrations, it is particularly difficult to This tends not to be a sufficient means for preventing the active material from falling off due to directional vibrations.

Furthermore, as shown in FIG. 8, a bag-shaped isolation material 7 that houses an anode plate having lattice-like ribs 18 is known, but according to this isolation material 7, the active material does not fall off from the electrode plate. However, if bubbles are generated, the horizontal lattice 18a obstructs the rise of bubbles, so bubbles tend to accumulate in that area, and the area where the bubbles accumulate and the electrolyte Since the electrode no longer comes into contact with the active material, the utilization rate of the electrode plate decreases.

(Object of the Invention) The present invention was made in view of the above circumstances, and an object of the present invention is to provide a storage battery that prevents the active material of the electrode plates from falling off and also allows air bubbles to escape when bubbles are generated. It is something to do.

(Means for Solving the Problems) In order to solve the above problems, in the present invention, electrode plates for anodes and cathodes are arranged alternately in a battery container storing an electrolytic solution, and isolated between the two electrode plates. In this battery, a plurality of corrugated ribs extending vertically at a predetermined interval in the lateral direction are provided on the separating material.

(Function) According to the above configuration, the force in the gravitational direction of the active material is absorbed by the wave-shaped ribs, and the bubbles can easily rise to the upper space.

(Example) Hereinafter, examples of the present invention will be described in detail based on FIGS. 1 to 5.

FIG. 1 is a partially cutaway side view of a storage battery according to an embodiment of the present invention. In the figure, 1 indicates a storage battery, and the storage battery 1 includes a battery 492, a cover 3 of the battery case 2, and an electrolyte 4 stored in the battery case 2.
For example, in the battery case 2.

Anode plates 5 and cathode plates 6 arranged alternately in 7 and 6 plates.
and a separating material 7 interposed between the anode plate 5 and the cathode plate 6 to prevent them from coming into contact with each other.

The battery case 2 can withstand mechanical shock and high and low temperatures.

It is formed into a roughly rectangular box made of highly acid-resistant synthetic resin. A saddle 8a on which the anode plate 5, cathode plate 6, and isolation material 7 are mounted is protruded from the bottom plate 8 of the battery case 2.

The anode plate 5 and the cathode plate 6 are formed into substantially square plate shapes, and legs 5a and 6a that ride on the saddle 8a of the bottom plate 8 are provided at their lower ends.

Current collectors 5b and 6b extend from the upper ends of the anode plate 5 and the cathode plate 6, respectively, and a ball strap 9 is attached to the current collectors 5b and 6b.
, 1o are welded. This ball strap 9,1
o, the anode plate 5 and the cathode plate 6 are each integrally formed.

Figure 2 shows 1 of the cell section 12 located on the ■-■ cross section of Figure 1.
The anode plate 5 is arranged approximately in the center of the cell part 12, and the anode plate 5 has two cathode plates 6,
6' and are integrally formed. The anode plate 5 includes an anode plate lattice 13 consisting of an anode plate vertical lattice 13a and an anode plate horizontal lattice 13b, and an anode active material 14 filled in the anode plate lattice 13. Separators 7, 7 are provided on both sides of the anode active material 14 of the anode plate 5 in close contact with each other.

As shown in FIG. 1, the separator 7 has a plate shape with a slightly larger outline than the bipolar plates 5 and 6.

As shown in FIGS. 3 and 4, a plurality of corrugated ribs 15 extending vertically at predetermined intervals are provided on one side of the isolation member 7. As shown in FIGS. On the other side of the separators 7, 7, cathode plates 6, 6' are provided in close contact with each other.
6' is a cathode plate vertical grid 16a.

16a' and cathode plate horizontal grids 16b, 16b';
17 and 17' filled with cathode active material.

FIG. 5 shows another embodiment of the invention, in which corrugated ribs 15 are provided on both sides of the separator 7.

Further, the wavy ribs 15 of the present invention can also be applied to the bag-shaped isolation material 7.

(Effects of the Invention) As detailed above, according to the present invention, electrode plates for anodes and cathodes are arranged alternately in a battery container storing an electrolytic solution, and a separating material is integrally provided between the two electrode plates. In the new M battery,
The separator is provided with a plurality of wavy ribs extending vertically at predetermined intervals in the lateral direction.

Therefore, it is possible to prevent the active material filled in the electrode plate from falling off due to the corrugated ribs provided on the separator, so that the life of the storage battery can be extended, and when air bubbles occur in the storage battery, Since the wavy ribs are wavy and extend in the vertical direction, they do not inhibit air bubble removal and do not reduce the actual capacity of the storage battery.6

[Brief explanation of drawings]

FIG. 1 is a side view of a storage battery according to an embodiment of the present invention, with a part thereof cut away, and FIG. 3 is a side view showing an isolator according to an embodiment of the present invention; FIG. 4 is a side view taken along line IV-■ of FIG. 3; and FIG. 4 and a circular sectional view showing another embodiment, FIG. 6 is a side view of a conventional isolation material, FIG. 7 is a view taken along arrow B in FIG. 6, and FIG. 8 is another prior art. FIG. 1... Storage battery, 2... Battery container, 4... Electrolyte, 5...
・Anode plate (electrode plate), 6... Cathode plate (electrode plate), 7...
Isolation material, 15... corrugated rib.

Claims (1)

[Claims] 1. In a storage battery in which anode and cathode plates are arranged alternately in a battery container storing an electrolytic solution, and a separator is integrally provided between the two plates, a predetermined interval is provided in the lateral direction to the separator. A storage battery characterized by being provided with a plurality of wave-shaped ribs extending in the vertical direction.