JP2002042795A - Method for manufacturing plate for lead-acid battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method for a plate, capable of reducing the weight of the plate and improving productivity without deteriorating battery performance when an expanded lattice is applied to a large-sized lead-acid battery. SOLUTION: This manufacturing method for a plate for a lead-acid battery has a process for continuously expanding and developing a lead or a lead alloy sheet, a process for punching a specified part, a process for cutting the sheet into the specified size, and a process for filling active material paste. After the sheet is cut into the specified size, it is rotated by 90 deg., and the active material paste is filled except collecting lug parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an expanded grid mainly used for a large lead-acid battery and a method for manufacturing an electrode plate using the expanded grid.

[0002]

2. Description of the Related Art An electrode plate for a lead storage battery, which is produced by developing a lead or lead alloy sheet, filling the sheet with an active material paste, and cutting the sheet into a predetermined size, a so-called expanded electrode plate, is manufactured continuously. The feature is that the electrode plate can be reduced in weight and the weight of the electrode plate can be reduced.

As one example of a conventional method for manufacturing an expanded electrode plate, as shown in FIG. 2, a lead or lead alloy sheet 1 is formed into a developing part 3 by a developing apparatus 2, and an active material filling machine 6 is used.
Thereby, the active material paste filling portion 7 is formed. The normal expanded electrode plate 12 is formed by connecting a part of the non-deployed portion 4 to the collecting ear portion 10.
And These current collecting ears are located in a direction perpendicular to the traveling direction 8 when the active material paste is filled, and the filling part 7 is adjusted so that the paste does not adhere to a portion serving as the ear. This is because if the paste is attached to the ear,
This is because it becomes extremely difficult to weld the lugs in a later assembling process.

There is no particular problem with an electrode plate of a lead storage battery for an automobile. However, when this expanded electrode plate is applied to a large lead storage battery having a large electrode plate, there are the following disadvantages. -A wide sheet and a large deploying device are required.-The strength is insufficient and the electrode is easily deformed when it is used as an electrode plate.-The discharge characteristics of the battery are deteriorated. In some cases, an expanded electrode plate has been proposed in which the developing direction 5 is the width direction of the electrode plate, and a non-deployed portion is left along the side of the electrode plate. When manufacturing such an electrode plate, as shown in FIG. 4, the ear 10 is positioned parallel to the traveling direction 8 at the time of filling, so that the active material does not adhere to the ear. It is necessary to prevent the active material from being applied to the following non-development area.

[0005] However, this makes it difficult to secure an active material per electrode plate, and when a battery is combined with an electrode plate having a different polarity, the active material of the opposite electrode plate is retained. There is a drawback in that portions where the surfaces do not overlap occur, and the active material is not effectively used. To overcome these drawbacks, the opening 13 may be provided in the non-deployed portion following the ear, and this portion may be filled with the active material. At the same time, the active material adheres to the ear. Therefore, it is necessary to remove the attached active material before the welding step.

Usually, as shown in FIG. 5, in the step of filling the expanded electrode plate, the active material paste is prevented from falling off.
Pasting paper 14 is stuck on the front and back of the portion to be filled with the paste so that the aging plates do not stick to each other. As described above, this pasting paper must be removed at the same time to remove the active material attached to the ears. In order to provide such a step for partially removing the active material, the production speed must be greatly reduced.

[0007]

SUMMARY OF THE INVENTION According to the present invention, when an expanded grid is applied to a large lead-acid battery, it is possible to manufacture an electrode plate capable of reducing the weight of an electrode plate and improving productivity without lowering the battery performance. It is an object to provide a method.

[0008]

Means for Solving the Problems When an expanded electrode is used for a large lead-acid battery, the battery performance is secured and the characteristics of the expanded electrode, such as productivity and weight reduction of the electrode, are utilized. In order to do so, the following means were considered.

[0009] As for the electrode plate shape, when the current collecting ear portion is turned upward, the developing direction is the width direction of the electrode plate, and a non-deployed portion below the ear portion is provided with an opening to remove the ear portion. An expanded electrode plate having an entire surface filled with an active material. In order to manufacture this electrode plate without lowering the productivity, unfolding processing and punching processing of a predetermined portion, cutting into one electrode plate shape,
Rotate every time and fill the entire surface except for the collecting ear with active material. As described above, by changing the direction of the current collecting ear portion to a direction perpendicular to the traveling direction before filling, the active material can be filled so that the ear portion does not fall on the ear portion, and the active material is partially removed. Since a process is not required, an expanded electrode plate having excellent discharge characteristics can be manufactured without reducing productivity.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below, but the present invention is not limited to the following description.

A negative electrode plate using the method of the present invention was produced as follows. A lead-calcium-tin alloy rolled sheet having a thickness of 1.3 mm and a width of 130 mm is developed as shown in FIG. 1 except for a non-developed portion in the center, and after punching a predetermined portion,
The grid plate 15 was cut at the position of the cut portion 9 indicated by the dotted line by the electrode plate dividing device 11 to produce a grid body 15 having a width of 140 mm and a height of 380 mm excluding the current collecting ears. The reason why the aperture is provided in the non-deployed portion is to reduce the weight of the grid and to allow the active material to be held in this portion.

Immediately after cutting, the grid is rotated 9 by a rotating device 16.
It turned around 0 degree and arranged so that the direction in which the current collection ears extend was perpendicular to the traveling direction. Subsequently, the frame mounting device 17
A polyethylene resin tape 18 is continuously ultrasonically welded to the upper and lower end portions of the lattice body to form a picture frame, and pasting paper is applied to the band-like (mat-shaped) lattice body by the resin tape, and a filling machine is used. 6, the entire surface excluding the current collecting ear portion was filled with the negative electrode active material paste. 19 is a pasting paper supply device.

By rotating the grid before filling, the non-deployed portion is left on the side of the electrode plate, and even if the grid is cut so that the developing direction is the width direction of the electrode plate, the ears are excluded. The entire surface can be filled with active material. The fact that the resin tape was welded to the bottom of the grid body eliminates the gaps between the grids,
In order to uniformly fill the active material, and FIG.
As shown in (2), since there is no frame at the upper and lower ends of the lattice, the filled active material is prevented from falling off. In this case, a polyethylene resin is used as the resin, but another material such as a polypropylene resin may be used as long as the material does not adversely affect the battery. After being filled with the active material, it was cut into a single electrode plate, and subjected to a normal aging and drying process to produce an unformed negative electrode plate.

On the other hand, the positive electrode plate was manufactured as follows. A lead-calcium-tin alloy rolled sheet having a thickness of 2 mm and a width of 130 mm is similarly developed, punched, cut, and turned into a grid having a width of 140 mm and a height of 380 mm. Was made into contact with a tape-shaped lead alloy produced by remelting, and continuously caulked to form a blind. The reason why a lead alloy is used in place of the resin is that the resin is oxidized and deteriorates immediately in the positive electrode of the lead storage battery, and that the punching waste is effectively used. Pasting paper was applied to these lattices and passed through a filling machine, and the entire surface except for the ears was filled with the positive electrode active material. After cutting into the shape of an electrode plate, the same as the negative electrode plate
An unformed positive electrode plate was produced through a drying step.

As described above, the manufacturing time of the expanded electrode plate manufactured by using the method of the present invention (hereinafter referred to as method A) (average time required for manufacturing one electrode plate from the lattice body production to before the aging step; standby time) Excluding transport time.),
And when manufacturing an expanded electrode plate of the same shape, after filling the active material paste on the entire surface of the expanded lead alloy sheet, the electrode plate manufacturing time by the method B of removing the active material at a position corresponding to the ear portion is reduced. Table 1 shows the estimated results.
According to this, it was found that the manufacturing time of the method A of the present invention can be reduced by 20% compared to the method B, and 60% for the conventional cast electrode plate.

[0016]

[Table 1]

A battery of 2 V 500 Ah / 10 HR was assembled using these unformed expanded electrode plates, but there was no problem in operation as compared with the case of using a conventional cast electrode plate. Table 2 shows the discharge performance of the battery thus manufactured in comparison with a battery using a conventional casting grid and a battery using a conventional expanded electrode plate (FIG. 6). The battery using the conventional casting grid and the battery using the electrode plate manufactured by the method of the present invention had the same discharge performance as the battery using the conventional casting electrode plate, and could be reduced in weight by about 10%.

[0018]

[Table 2]

[0019]

According to the present invention, when the expanded lattice is applied to a large lead battery having a high electrode plate height, a light-weight electrode plate having excellent discharge performance can be manufactured without reducing productivity.

[Brief description of the drawings]

FIG. 1 shows an example of a method for manufacturing an expanded electrode plate according to the present invention.

FIG. 2 shows an example of a conventional method for manufacturing an expanded electrode plate.

FIG. 3 is a view showing an example of an expanded lattice body for a large electrode plate;

FIG. 4 is a top view showing an example of a method for manufacturing an expanded lattice body for a large electrode plate.

FIG. 5 is a side view showing an example of a method for manufacturing an expanded lattice body for a large electrode plate.

FIG. 6 is a diagram showing an example of an expanded lattice body for a large electrode plate having a conventional shape.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 lead or lead alloy rolled sheet 2 unfolding device 3 unfolding unit 4 undeployed unit 5 unfolding direction 6 filling machine 7 active material paste filling unit 8 traveling direction 9 cutting unit 10 current collecting ear unit 11 electrode plate dividing unit 12 expanded pole Plate 13 Opening 14 Pasting paper 15 Grid 16 Rotating device 17 Frame mounting device 18 Resin tape 19 Pasting paper supply device

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3C039 DA11 5H017 AA01 BB07 BB08 BB14 BB15 CC05 EE02 HH00 5H050 AA08 AA19 BA09 GA04 GA22 HA00

Claims (3)

[Claims] 1. A lead-acid battery electrode plate comprising a step of continuously expanding and expanding a lead or lead alloy sheet, a step of punching a predetermined portion, a step of cutting to a predetermined size, and a step of filling an active material paste. A method for producing an electrode plate for a lead-acid battery, comprising cutting a sheet to a predetermined size, rotating the sheet 90 degrees, and filling an active material paste except for a current collecting ear. 2. The lead plate for a lead storage battery obtained by the method according to claim 1, wherein a non-deployed portion extending from an end of the deployed portion is a current collecting ear portion, and the current collecting ear portion is positioned upward. A method for manufacturing an electrode plate for a lead storage battery, wherein the width direction of the electrode plate is the expanding direction. 3. The method for manufacturing a lead-acid battery electrode plate according to claim 1, wherein the sheet is cut to a predetermined size, and the end of the developed sheet rotated by 90 degrees is continuously covered with resin or lead or a lead alloy. A method for manufacturing an electrode plate for a lead-acid battery, characterized by filling an active material paste into a spread processed sheet in a band-like state.