JPS58112253A - Production method of electrode plate for lead storage battery - Google Patents

Abstract

PURPOSE:To prevent an organic solvent from being released into the atmosphere and to remove the oil content, etc. attached to a sheet by cleaning the expanded sheet through a scouring tank containing two layers of the organic solvent and water then by filling a paste-like material. CONSTITUTION:Trichloroethylene as an organic solvent 5 and water 9 are put in a scouring tank 6. At this time, the density of the trichloroethylene is much higher than that of the water 9 and is hardly dissolved in the water 9, therefore, the layer of the trichloroethylene 5 is formed below and the layer of the water 9 is formed above completely in two layers. Next, a sheet 3 attached with the oil content is first guided through the trichloroethylene as the organic solvent 5 below to remove the oil, and subsequently it is guided through the water 9 above to substitute the trichloroethylene attached on the surface with the water 9. Then, it is guided through a drier 7 to remove the attached moisture, and finally the active material is filled to it by a filling machine 4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a method for producing an electrode plate for a lead-acid battery, in which an electrode plate is obtained by filling an active material into an expanded sheet made of a thin plate made of lead or a lead alloy.

In recent years, the manufacturing method of electrode plates for lead-acid batteries, in which electrode plates are made by filling active material into expanded sheets of lead or lead alloy thin sheets, has been compared to the manufacturing method in which lead or lead alloy is cast as a base material. It is rapidly gaining popularity due to its advantages such as the ability to make the base body lighter and the ability to produce it on a continuous line up to the battery assembly stage.

Conventionally, as shown in Fig. 151, when expanding a thin plate l made of lead or lead alloy, care must be taken to prevent damage to the cutter and die cutter of the expanding machine 2.
Alternatively, since the machine is lubricated to ensure smooth operation, oil adheres to the expanded lead or lead alloy sheet 3. Furthermore, the thin plate 1 is often contaminated with oil and other contaminants during the rolling process. So before filling the active material with filling@4.

It was degreased by passing it through a cleaning tank 6 containing an alis agent 6 such as tricumylethylene. Furthermore, if the organic solvent 6 enters the lead-acid battery, it will cause performance deterioration such as poor charging and increased self-discharge.

The organic solvent 5 remaining on the sheet 3 must also be completely removed before filling the active material. For this reason, sheet 3'
The above-mentioned organic solvent 6 was removed by heating and drying it in a dryer 7, but due to its high volatility, the dryer was used to prevent the organic solvent 5, which is harmful to the human body, from escaping to the outside. 7's structure has become extremely complex. Furthermore, since the organic solvent 5 evaporates into the atmosphere from the cleaning tank 6, a local exhaust system 8 must be installed, and this system has various drawbacks.

The present invention eliminates the above-mentioned drawbacks, and eliminates organic solvents that are harmful to the human body from being dissipated into the atmosphere.It also eliminates dirt such as oil that adheres to sheets made of thin sheets made of lead or lead alloys. The aim is to completely eliminate the

An embodiment of the present invention will be described.

As shown in FIG. 2, trichlorethylene as an organic solvent 5 and water 9 are placed in a cleaning tank 6.

At this time, since trichlorethylene has a much higher density than water 9 and is hardly soluble in water 9, it is completely divided into two layers with 50 layers of trichlorethylene on the bottom and 90 layers of water on the top.

First, the sheet 3 to which oil has adhered is degreased by passing it through trichlorethylene as the organic solvent 5 in the lower layer. Subsequently, the water 9 in the upper layer is passed through to replace the trichlorethylene attached to the surface with the water 9. The adhering moisture is removed by passing through the backward rotation I1 machine 7, and finally the active material is filled by the filling machine 4.

Note that even if moisture remains attached to the surface of the sheet 3, the active material can be filled in the same way as usual, and even if it gets into the battery, there will be no effect at all, so the drying step can be skipped.

In addition, in order to efficiently degrease with trichlorethylene and replace trichlorethylene attached to the surface with water 9,
Ultrasonic cleaning is very effective.

According to the above embodiment, harmful trichlorethylene does not volatilize into the atmosphere from the surface of the cleaning tank 6, and the dryer 7
Since it does not penetrate into the air, there is no chance of it escaping into the atmosphere during drying. As a secondary effect, when the sheet 5 is wetted with water and dried in a bale, the surface of the sheet 3 is oxidized, which improves the adhesion between the active material and the sheet 3 after being filled with the active material and chemically formed. This also improved battery characteristics.

As mentioned above, the present invention has great industrial value, such as preventing organic solvents from escaping into the atmosphere and removing oil and the like adhering to the sheet.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of the electrode plate manufacturing process in the conventional method for manufacturing electrode plates for lead-acid batteries, and FIG. 2 is a schematic diagram of the electrode plate manufacturing process in the present invention. l is a thin plate, 3 is a sheet, and 5 is an organic Solvent, 6 is cleaning tank, 9
is water patent applicant

Claims (1)

[Claims] A method for producing electrode plates for lead-acid batteries, characterized in that a sheet made by expanding a thin plate made of lead or a lead alloy is passed through a cleaning tank made of a double layer of an organic solvent and water, and then is filled with a paste-like substance.