JPS5956368A - Performance recovery method for lead-acid battery - Google Patents

Abstract

PURPOSE:To recover, with easy way, performance of a negative plate having a lead-antimony alloy grid of a lead-acid battery by generating hydrogen sulfide gas in electrolyte, especially by compulsorily charging a battery at an electrolyte temperature of 60-100 deg.C. CONSTITUTION:Performance of a lead-acid battery having a lead-antimony alloy grid is recovered by generating hydrogen sulfide gas in electrolyte. To supply H2S gas to a practically battery, a supply pipe, or an H2S bottle of H2S generator are necessary. When a battery is compulsorily charged at high temperature, a small amount of H2S gas is generated and the same effect as H2S gas supply is expected. Therefore, a battery is compulsorily charged at electrolyte temperature of 60-100 deg.C to recover discharge capacity and self discharge.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for restoring the characteristics of lead ponds contaminated with antimony and causing so-called sulfation.

As is well known, a π lead acid battery using a lead-antimony alloy lattice used in electrician charging reaches the end of its life due to corrosion of the positive lattice, and antimony ions are precipitated in the negative lattice. When contaminated with antimony, the hydrogen overvoltage of the negative plate becomes small, and lead sulfate is produced by the following reaction, which develops and causes the so-called sulfur ion, which makes it impossible to charge.

Pb + 21: [+804 → Pb80< +
H! In order to prevent this, grids made of low anotimony alloys or lead-calcium alloys are beginning to be put into practical use.

But these! In ponds, a barrier made of a lead compound with no conductivity is likely to be formed at the interface between the iE plow lattice and the active material, which may lead to a short life.

The present invention aims to eliminate the above-mentioned drawbacks of lead-acid batteries used in constant WLEE charging and to extend their lifespan.

The gist of the present invention is to generate hydrogen sulfide gas in an electrolytic solution, and particularly to forcibly photoelectrically generate hydrogen sulfide gas at an electrolytic solution temperature of 60 to 100''C.

Stationary batteries using a lead-antimony alloy lattice containing 5% antimony for about 10 years 2.11) v/nacelle constant current FE
The charge of the active material of the charged battery is 0.15.
%, most of which is attached to the moving plate surface fζ. The relationship between the photodischarge Wl, current and the 1111 (to) potential for this negative plate and the new negative fMl& is shown in Figure 1. In addition,
In Figure 1, the solid line is the new negative-temporary case, and the dotted line is 10
Shows the case of negative -) after a year has elapsed. 10 years have passed 1
In this case, the hydrogen overvoltage is small and self-discharge occurs.

The speed is approximately 100 times faster. This self-discharge rate can be found from the intersection of the potentials of the charging reaction and the discharging reaction in Figure 1. In other words, the self-discharge reaction is divided into f and fζ as described above, and the intersection, that is, the point where the potential is the same. Hydrogen sulfide (Hs8) was bubbled into the tube.1Then, the relationship between the charging/discharging current and the pot potential was determined in the same manner as described above and is shown by the broken line in FIG. The reaction rate of self-discharge is reduced to about ]i0.

In order to supply H2S gas to a practical battery, it is necessary to provide a supply pipe, prepare a cylinder for H2S gas, and prepare a generator. However, when the battery is forcibly charged at a high temperature, a green discharge reaction is obtained and the results are shown in Table 1.

Although the self-discharge rate 1i [decreases above 60'C, -
Million releases! @The amount decreases above 110°C. Sunawa
4. It can be seen that in order to recover both the discharge capacity and self-discharge rate, it is necessary to forcefully charge the electrolyte at a temperature of 60 to 100''C.

As mentioned above, the reason why the negative self-discharge rate becomes smaller with iζH28 gas is 2Sb -1-3H28-+ Hbs8g -1-3H
It is thought that 8b is removed from the negative plate by the reaction z.

Well, Ht8 gas is generated by forcibly charging in the Tko high temperature residence is Ign + 804-1-1ie -Ht8-1-4f
It is thought to be a reaction of l*0, but there is no confirmation yet.

The present invention has been described in detail above, and it is an object of the present invention to recover the negative negative characteristics of an fFI storage battery using an antimony alloy lattice in a simple manner.

[Brief explanation of the drawing]

FIG. 1 is a characteristic diagram showing the relationship between charging current and negative potential of a lead-acid battery. 5 - River 1st l /θ /ρp
tlz6θ /σρ7117 Rokuyori Homare Tatamige (Side A)

Claims (1)

[Claims] (11) A method for restoring the characteristics of a lead-acid battery having an antimony alloy lattice characterized by generating hydrogen sulfide gas in the electrolyte (21) A method for restoring the characteristics of a lead-acid battery having a lead-antimony alloy lattice, characterized in that hydrogen sulfide gas is generated from the photovoltaic process.