JPS63239765A - Lead storage battery - Google Patents

Abstract

PURPOSE:To improve the antiabrasive property by sealing up after pouring a foamy resin in a bag-formed resin, and housing it together with an electrode plate group in a battery jar cell chamber before the foamy resin is foam- solidified, so as to foam-solidity the foamy resin and fix the electrode group. CONSTITUTION:When an electrode plate group 3 is inserted in a battery jar 1, a resin bag 8 sealed up beforehand in which a foamy resin material 7 has been poured is inserted in the battery jar at the same time. The foamy resin material 7 inserted together with the electrode plate group 3 is solidified while starting the foaming with the time, and the clearance between the electrode plate group 3 and a rib 1 is blocked up. By blocking up the clearance around the electrode plate group 3, a disorder from the vibration of the electrode plate group 3 is eliminated and the deterioration from the fatigue can be suppressed. Consequently, a high quality storage battery of a high vibration-resisting property as well as of a low cost can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to lead-acid batteries, and is particularly intended to suppress deterioration phenomena that may occur under severe vibration resistance conditions.

Conventional technology Conventional lead-acid batteries tend to have higher starting performance and longer lifespans.Especially in terms of high starting performance, further improvements have been made by using glass pine-less separators and synthetic resin separators. It is coming.

Among them, in the structure of the battery, the battery case 1 is
When inserting the electrode plate group 3 into the inside, since the separator is pinless, the electrode group itself has no elasticity at all, and the width W of the electrode plate group becomes an immovable dimension.For this reason, assembly productivity was considered. In this case, the electrode plate group width W1 is
must ensure some leeway. Normally, the electrode plate group width W1 is 1.0a to 2 for the dimension W between battery case ribs.
．． It is preferable to set it to 0a, and 2. Especially when there is a gap larger than Off, a separate part such as pulp material or foam sheet material is inserted into the gap for adjustment.

Problems to be Solved by the Invention At present, lead-acid batteries are widely used in the market not only for general automobiles but also for special purposes such as agricultural machinery and construction machinery.

However, in this special vehicle application, lead-acid batteries are particularly sensitive to the vibrations of the vehicle and the vibrations that the vehicle is subjected to.
Not enough consideration was given to this, and in special vehicles, the structure of lead-acid batteries deteriorated due to numerous vibrations, resulting in short lifespans.

In the conventional technology, the plate group width W1 must be smaller than the battery case rib-to-rib dimension W0, and this gap becomes a factor that causes the plate group to ripple due to vibration, resulting in However, due to fatigue deterioration of the electrode plate group, the service life is shortened. Especially when the liquid level is low and the current-carrying parts are about to break due to vibration, the sparks (even minute ones) that occur are gas (hydrogen gas present inside the battery case).
If inside, it may explode.

゛In this way, if there is a gap between the electrode plate group and the battery case lip, when used in special vehicles, it can cause major problems such as short life due to vibration and, in the worst case, explosion. was.

In addition, even when inserting a separate part such as a foam material into the gap, it is impossible to keep the gap within ±Off even considering the variations in the thickness of the electrode plate and the separate part such as the foam material. In order to prevent parts from shifting (slipping up) due to vibration, the dimension between the lip of the battery case W0. Although it is necessary to adjust and set the pressurized state so that the pressure becomes larger, this is not possible with current technology, even considering the assembly productivity of automated lines.

Therefore, no improvement in vibration resistance can be expected by inserting a separate component such as a foam material into the gap. Furthermore, if a foamed material is used as a spacer material, this foamed material has a
It must have excellent acid resistance against dilute sulfuric acid of about 40%, and the materials that can be used are limited, and most of the materials currently used are expensive.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention injects a foamable resin into a resin bag and then seals it, and before the foamable resin foams and solidifies. In addition, by storing the battery together with the electrode plate group in the cell chamber of the battery case, the foamable resin foams and solidifies, fixing the electrode plate group and improving vibration resistance.

Effects According to the present invention, with the above-described configuration, by plugging the gap around the electrode plate group, it is possible to eliminate cracks caused by vibration of the electrode plate group and suppress fatigue deterioration.

Embodiment FIG. 1 shows the external appearance of a storage battery and the state of the electrode plate group, and the arrows a, b, and c indicate vibrations applied to the storage battery classified by direction.

FIG. 2 is a sectional view of the electrode plate group 3 of FIG. 1 viewed from the long side. When the electrode plate group 3 is stored in the cell chamber of the battery case 1, the electrode plate group width W1 is usually about 2.0 mm larger than the rib-to-rib dimension W0 of the battery case. It is designed to be relatively small and can be easily inserted into the cell chamber.

When inserting the electrode plate group 3 into the battery case 1 in FIG. 3, a sealed resin bag 8 in which the foamable resin material 7 is poured is inserted into the battery case 1 at the same time. The foamable resin material 7 inserted at the same time as the electrode plate group 3 solidifies while starting to foam over time, and can plug the gap between the electrode plate group 3 and the ribs 1.

Incidentally, after pouring the foamable resin material 7 into the resin bag 8,
A series of steps to seal this are currently commercially available.
It can be easily obtained.

The vibration resistance performance of the storage battery with the gap 4 plugged in this manner is clearly effective as shown in the comparative test results using the vibration tester shown in FIG. Figure 4 (a), (b), and e all simulate the vibration directions in Figure 1, where (a) is in the C direction (vertical direction), and (b) is in the b direction (back and forth direction). , (c) are the results of a comparison test between the conventional product and the improved product of the present invention in the C direction (left-right direction). It also represents the limit when it is determined that the life of the storage battery is greatly affected, such as breakage of the lead connector 6. As can be seen from the results, it can be seen that the level of vibration resistance has been significantly improved in both vibration directions.

Effects of the Invention As described above, the present invention provides a high-performance storage battery that is extremely inexpensive and has high vibration resistance.

By adopting the electrode plate group and spacer structure as in the present invention, variations in electrode plate thickness and resin molded battery case dimensions can be easily absorbed.
A constant group thickness can be created without using expensive parts such as a glass cape, and an extremely reliable storage battery can be provided.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view showing the external appearance of the storage battery and the storage state of the electrode plate group, Fig. 2 is a sectional view of the electrode plate group in Fig. 1 seen from the long side, and Fig. 3 is a Figure 4 (a), (b), and (c) are a cross-sectional view of the foamed resin solidified after actually inserting it into the battery case and plugging the gap between the electrode plate group and the vibration test. FIG. 2 is a diagram showing the results of a comparison test of vibration resistance performance by vibration direction of the machine. 1...Battery container, 2...Reply, 3...
... Plate group, 4 ... Gap, 6 ... Lead connection body, 6 ... Pole plate lug, Wo ... ... Dimensions between battery case lips , W... Plate group width, (()...
...Vertical direction ([direction), (B)... Front and back direction (b direction), (C)... Left and right direction (C direction)
. Name of agent: Patent attorney Toshio Nakao and 1 other person1-
Ichidenkasu 2-1-Rib 3-! Plant group 7---)! + Fat #Ikezai material 8-Yu'f4w fissure bag Figure 3 Figure 4

Claims (1)

[Claims] After the foamable resin is injected into a resin bag, it is sealed, and before the foamable resin foams and solidifies, the foamable resin is stored in the battery cell chamber together with the electrode plate group. A lead-acid battery characterized by solid foaming and fixing of electrode plates.