JPS63138650A - Charging method for lead storage battery - Google Patents

Abstract

PURPOSE:To forcibly form PbSO4 on a substrate and an active material affecting the self-discharge speed and suppress the self-discharge quantity of the active material in storage by discharging for a short time with a high current. CONSTITUTION:After an initial charge, the drying process is performed, thus the adhesion between a substrate of a positive electrode plate and an active material is deteriorated, but when dilute sulfuric acid is injected and a current is fed, this condition is changed, and a relatively active condition is obtained. After a charge is completed, a discharge is forcibly performed with a high current, e.g., 10C current (IC is a value indicating the 20-hour rate capacity), for a short time, e.g., 0.5 sec. Thereby, active PbO3 formed between the substrate and the active material can be discharged and stable PbSO4 is slightly formed on the surface of the substrate, and the action suppressing a self-discharge while a battery is left intact can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a T-charging method that improves the storage performance of lead-acid batteries.

Conventional technology Traditionally, the production method for lead-acid batteries incorporates unformed electrode plates.
! Glue the pond, inject dilute sulfuric acid, and charge the battery for the first time. After that, there is a way to dry it, insert a battery, and inject Kazuki #LfR to finish it as intelligence.

However, the problem that the invention is trying to solve is that lead-acid batteries, which are made by stiffening and assembling charged and dried electrode plates and finishing them by injecting dilute sulfuric acid, have a long history of high self-discharge during storage.

Means for Solving the Problems The present invention solves the above problems, and the self-discharge rate Il
In order to forcibly form PbOd on the active material and to suppress the amount of self-discharge of the active material during storage, we adopted a method of discharging at a high current for a short period of time.

Since the charged and dried electrode plate is subjected to drying treatment after the first light η, the density of the active material and the base of the anode plate has decreased, but by injecting dilute sulfuric acid and passing an electric current, , its state becomes qualitative and becomes relatively active. It was produced after drying. Pit(OH), Pt)O, etc. β
This is thought to be because -pbo becomes more likely to become a concentrated active substance.

Therefore, if Yokitomi Pond were left unattended after the military era, it is thought that self-discharge of the anode plate would increase. According to the present invention, for example, 100 current (LC is 2
By forcibly performing e-irradiation for a short period of time, for example, 0.5 seconds, with a large current of 1 value or more indicating 0 time rate capacity,
The active Pb0a formed on the substrate and the amount of n substance can be discharged, and a small amount of bistable Pb5Oa on the surface of the body is formed.
It can be said that the effect of completely suppressing the self-discharge of jIt4 can be obtained.

Example An embodiment according to the present invention will be described below.

A 36B20 11E battery charged in the conventional manner and one battery discharged for 0.5 seconds at 300A after charging were heated at 40°C.
Change in 15A release capacity at -15℃ when stored inside Yl! It is shown in Figure 1. FIG. 1 shows the initial volume as *wtoo.

As a result, the capacity remaining rate after 28 days of the battery according to the present invention at 140° C. was significantly better than that of the battery made by the conventional method.

FIG. 2 shows the discharge characteristics of the anode voltage of the low-temperature, high-rate discharge 'aiE# after 30 days at 40°C. The conventional one is
Due to the large self-discharge, discharging became impossible after about 10 seconds, whereas with the present invention, discharging was possible for about 15 seconds. In this experiment, storage was carried out at 4 ()℃, but when stored at 25℃ (25℃), *when the battery discharge capacity drops below 50%? = 2 Approximately 6 for the conventional one
However, the product according to the present invention could be stored for a long period of about 12 months.

Effects of the Invention According to the present invention, lead-acid batteries can be stored for a long period of time, and the advantage is that high-current short-time discharge can be used to detect welding defects and manufacturing defects.

It has great industrial value.

[Brief explanation of the drawing]

Figure 1 is a comparison chart showing the change in the 1" capacity remaining rate during storage, and Figure 2 is a comparison chart showing the change in anode voltage during discharge after storage at 40°C for 30 days. Patent issuer

Claims (1)

[Claims] In the charging method for lead-acid batteries, in which dilute sulfuric acid is injected into a lead-acid battery with built-in dried electrode plates, and the battery is charged and shipped, after energization is completed,
A method for charging lead-acid batteries characterized by high current and short-time discharge.