JPH06168718A - Electrode plate for lead-acid battery - Google Patents

Abstract

PURPOSE:To prevent protective paper applied on a surface of an electrode plate from peeling by applying the protective paper on a surface of an active material paste charged plate, leaving it under a high-temperature and high- moisture atmosphere, and carbonating the surface of a charged active material layer. CONSTITUTION:A belt-shaped porous plate is manufactured continuously of material of a lead or lead alloy belt plate to have an expansion type mesh development part. Active material paste is charged and applied on this plate to form a belt of a paste charged plate. On a surface of a paste charged layer of the charged plate, belts of protective paper comprising thin paper are applied continuously on both sides. Next, it is heated and dried at a proper temperature, and it is cut in a specified length in order, so an electrode plate for a lead-acid battery having the protective paper on the surface is manufactured. The electrode plate is put in a processing chamber to be left in a high-temperature and high-moisture atmosphere, thereby lead carbonate is generated on the surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead storage battery electrode plate.

[0002]

2. Description of the Related Art A conventional lead-acid battery electrode plate is a porous substrate made by an expanding method or a continuous casting method.
Forming a paste-filled plate by filling and coating the active material paste, on the surface of the paste-filled layer, subsequent handling, especially when assembling the electrode plate group by the vacuum method,
To prevent the filling active material from falling off, attach protective paper,
Next, it is heated to dry the paste-filled layer, and the dried active-material-filled layer is coated with the protective paper to prepare the electrode plate assembly for assembly.

[0003]

However, the electrode plate manufactured as described above has a vacuum method for assembling an electrode plate group, and when the electrode plate is sucked and held, the electrode plate is attracted by its suction force. The protective paper is peeled off from the sheet, and the protective paper sticks to its suction port, making it impossible to suck and hold the next electrode plate, which often causes an inconvenience in assembling the electrode plate group. In addition, the protective paper is often peeled off during handling such as transportation before the assembly work, and in this case, since the electrode plate surface is directly sucked in the assembly process of the electrode plate group, The suction force caused a drop in the active material-filled layer, resulting in a loss of the electrode plate. The above-mentioned inconvenient phenomenon occurs particularly often in the case of an expanded type lattice substrate having no outer lattice as the porous substrate.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the above problems and improves the prevention of peeling of protective paper, and in particular, provides an electrode plate for a lead storage battery which can smoothly and satisfactorily assemble the electrode plate group. With the porous substrate, the protective paper is stuck on the surface of the paste-filled layer of the paste-filled plate formed by filling and coating the active material paste, and this is left under high temperature and high humidity atmosphere, The surface of the paste-filled layer is converted to lead carbonate.

[0005]

The lead carbonate formed on the surface of the electrode plate of the present invention has a function of firmly binding the protective paper, so that it is sucked during the subsequent handling, particularly by the vacuum method when assembling the electrode group. The protective paper is hard to peel off when
The assembly work of the electrode plate group can be done smoothly and satisfactorily.
It is possible to prevent the filling active material from falling off due to suction.

[0006]

EXAMPLES Next, examples of the present invention will be described in detail. As the porous substrate, an expanded lattice substrate, a cast lattice substrate,
Although any type such as a punched type perforated substrate can be used, an example using a protective paper of an expand type which is particularly easy to peel will be described below.

A strip-shaped porous substrate having a mesh-like developed portion is continuously manufactured by a lead or lead alloy strip-shaped plate as a material, and the strip-shaped porous substrate is filled and coated with an active material paste to form a strip-shaped substrate. The paste-filled plate of 1 is prepared, and then strip-shaped protective paper made of thin paper is continuously attached from both sides to the surface of the paste-filled layer of the filled plate. Next, this is heated at an appropriate temperature to be dried, and then sequentially cut into a predetermined length, so that a large number of lead-acid battery electrode plates having protective paper adhered to the surface thereof are sequentially manufactured.

According to the present invention, a large number of the above-mentioned lead-acid battery electrode plates thus obtained are placed in a processing chamber, for example, in an appropriate number of stacked state, and placed in a high-temperature, high-humidity atmosphere. put. Preferably, the temperature is 30 to 60 ° C and the humidity is 80 to 10
Leave in a 0% atmosphere for 5 to 24 hours. In that case, since lead carbonate is generated on a part or the whole surface of the active material filling layer of the electrode plate, the binding force with the protective paper attached to the surface can be increased. When treated in the above-mentioned stacked state, the active material in the four peripheral regions on the surface of the electrode plate, which is in good contact with the above atmosphere, is converted to lead carbonate except for the uppermost electrode plate. In order to convert the entire surface of each electrode plate to lead carbonate, it is necessary to arrange it with a small space in the vertical direction. For example, they are placed on a plurality of metal mesh shelves and processed.

The thus treated electrode plate of the present invention and the conventional electrode plate not subjected to such a treatment were suctioned with a suction force of 0.5 kg / cm ² to examine whether or not the protective paper was peeled off.
As a result, the peeling rate was 2% in the conventional electrode plate, whereas in the electrode plate of the present invention in which only the four-circumferential region was lead carbonated.
It was significantly reduced to 0.3%, and in the electrode plate of the present invention in which the whole area was converted to lead carbonate, peeling was completely prevented at 0%.

[0010]

As described above, according to the present invention, the active material paste-filled plate to which the protective paper is adhered is treated in a high temperature and high humidity atmosphere to convert the surface of the filled active material layer into lead carbonate. The binding force of the protective paper on the upper surface is improved, and in subsequent handling, there is an effect that the assembly work of the electrode plate group by the vacuum system can be smoothly performed. in this case,
Maintaining the required time for lead carbonate conversion in an atmosphere with a temperature of 30 to 60 ° C and a humidity of 80 to 100% will easily and surely prevent the protective paper from peeling, making it a good electrode plate for lead acid batteries. Leading to good manufacturing.

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] June 21, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

A strip-shaped porous substrate having a mesh-like developed portion is continuously manufactured by a lead or lead alloy strip-shaped plate as a material, and the strip-shaped porous substrate is filled and coated with an active material paste to form a strip-shaped substrate. The paste-filled plate of 1 is prepared, and then strip-shaped protective paper made of thin paper is continuously attached from both sides to the surface of the paste-filled layer of the filled plate. Next big
Cut the pieces one by one to a predetermined length, and then cut the surface at an appropriate temperature.
A large number of electrode plates for lead-acid batteries, which are heated and dried, and whose surface is covered with protective paper, are sequentially manufactured.

Claims (2)

[Claims] 1. A protective paper is attached to the surface of the paste-filled layer of a paste-filled plate obtained by filling and coating an active material paste on a porous substrate, and the paste is left in a high temperature and high humidity atmosphere. An electrode plate for a lead storage battery, which is obtained by converting the surface of the paste filling layer into lead carbonate. 2. The paste-filled plate to which a protective paper is adhered is left in an atmosphere having a temperature of 30 to 60 ° C. and a humidity of 80 to 100%, and the surface of the paste-filled layer is converted to lead carbonate. Electrode plate for lead acid battery.