JPS61245472A - Manufacture of enclosed lead storage battery - Google Patents

Abstract

PURPOSE:To make both of the positive and negative electrode material inert while to prevent production of gas when injecting the liquid thus to quicken liquid injection by employing positive and negative plates in discharging condition when assembling a battery. CONSTITUTION:The positive and negative plates to be employed when assembling a storage battery are brought into discharging condition thus to make both of said plates inert. Consequently, production of gas is eliminated when injecting the liquid resulting in quick permeation of electrolyte into the plates and the separator.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in the manufacturing method of sealed lead-acid batteries.

Conventional technology The conventional manufacturing method for sealed lead-acid batteries is that it is difficult to perform so-called battery cell formation, in which electrolyte is held in the lead-acid battery and an extra electrolyte is added to make it non-fluid. Both the plate and the cathode plate are manufactured by using pre-fabricated plates, assembling them, filling them with liquid, and charging them for the first time.

However, according to this manufacturing method, when injecting liquid after assembling both the anode and cathode plates using pre-fabricated plates, the lead oxide and sulfuric acid in the electrode plates react to form a gas. This occurs and the liquid injection port in the lid is blocked, making it difficult for the electrolyte to enter through the liquid injection port, resulting in the electrolyte overflowing. In this type of sealed lead-acid battery, since the amount of electrolyte in the battery is limited, it is inevitable that the electrolyte will decrease due to moisture permeation from the battery, so the initial injection amount will be accurate. 0 Therefore, it takes a lot of time to inject the liquid while sucking it up with a vacuum pump etc., but the smaller the capacity of the storage battery, the faster the liquid will be injected. The opening was also small, making it unsuitable for mass production processes.

Means for Solving the Problems The present invention eliminates the above-mentioned drawbacks by bringing the negative and anode plates used in assembling a storage battery into a discharge state, and rendering the negative and anode active materials inert. This allows gas to be generated during liquid injection and liquid injection to be carried out quickly.
An electrolytic solution can be infiltrated into the separator.

Example 6m12 type (0V 1.2 Ah)! The figure shows the correlation between the discharge state of the positive and negative electrode plates and the shortest injection time without electrolyte leaking when 11-1 electrolyte is injected per cell in the injection process in manufacturing closed lead-acid batteries. Note that the injection was carried out by gravity without using a vacuum pump, and the falling speed was adjusted with the stopper of the billet. Moreover, the inner diameter of the liquid injection port of the lid is 6Iall.

Incidentally, the discharge state on the horizontal axis means that the nominal capacity 1.2 Ah is 10
This is the ratio of the amount of discharge when it is set to 0%. Discharge after formation 5
H, R capacity test current! ! It was done at F degree.

As shown in the drawing, the deeper the discharge state, the shorter the time required for injection. Moreover, the effect is saturated at about 25%. However, if the discharge state becomes deep and ends, it takes time and electricity to recover, so it is preferable to set it to 50% or less.

According to the present invention, since the electrolytic solution does not leak out, it is possible to reduce defects.

Effects of the Invention As described above, the present invention assembles a storage battery using positive and negative electrode plates in a discharged state, thereby eliminating the generation of gas when pouring electrolyte into a t' battery and significantly shortening the pouring time. It is of great industrial value as it can be shortened.

[Brief explanation of drawings]

The drawing is a curve diagram showing the correlation between the discharge state of the electrode plate during assembly and the minimum electrolyte injection time in the injection process in the present invention.

Claims (1)

[Claims] A method for manufacturing a sealed lead-acid battery, characterized by using an anode plate and a cathode plate that are in a discharged state during assembly of the sealed lead-acid battery.