JPH0963591A - Manufacture of electrode plate for storage battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the breakage of a separator by arranging a flat cutting space at the tip of a cut-out part for obtaining a unit electrode plate by cutting from a continuously manufactured belt-shaped plate so as not to form sharp projections in the corner of an electrode plate. SOLUTION: An expanded electrode plate for a lead acid battery is obtained, for example, in such a way that a net-shaped grid is formed by forming breaks in a lead alloy sheet in an expanding process, unnecessary parts are removed in a blanking process, and a continuous belt-shaped sheet is manufactured through an active material filling process, then the sheet is cut in the specified width. Flat cutting spaces 2 are formed at the tips of cut-out parts 1 of upper and lower frame bones 3. By cutting the cutting spaces 2, the breakage of a separator caused by the contact of the corners of electrode plate when a unit electrode plate obtained is assembled is prevented. The dimension of the flat cutting space 2 is decided by considering the accuracy of a cutting machine.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art For example, as shown in FIG. 1, an expanded electrode plate for a lead storage battery has a developing step 7 in which a lead alloy sheet is cut and expanded to form a mesh lattice, and then a punching step 8 for punching out unnecessary parts. The active material filling step 9 is continuously manufactured in the form of a strip, and the unit electrode plate is obtained through a cutting step 10 of cutting into a predetermined width.

In the conventional expanded electrode plate thus obtained, as shown in FIG. 5, the upper and lower frame bones 3 are formed horizontally and the electrode plate is cut vertically in the width direction. Corner 12 is formed as a near-right tip.

However, when assembling the electrode plate group of the storage battery using the expanded electrode plate or during the use of the storage battery, the corners of the electrode plate come into contact with the separator and damage the separator, so that a short circuit is likely to occur. there were.

For this reason, the separator is prevented from being damaged by using an expanded electrode plate in which notches 1 as shown in FIG. 6 are formed at the ends of the upper and lower frame bones which are the corners of the electrode plate. .

[0006]

However, even in the expanded electrode plate manufactured in this manner, when the cutting position shifts, sharp projections 6 are formed at the corners of the electrode plate as shown in FIG. The separator could be damaged, causing a short circuit.

[0007]

In order to obtain an electrode plate without such a defect, the present invention obtains a unit electrode plate by cutting a notch formed in a continuous band shape and having a predetermined size. In the method of manufacturing the electrode plate for a storage battery, a flat cutting margin is provided at the tip of the notch 1 and the cutting margin 2 is cut to obtain a unit electrode plate. (The size of the flat cutting margin is determined in consideration of the accuracy of the cutting machine.)

[0008]

In the unit electrode plate thus obtained, the corners of the electrode plate are smooth and the formation of the sharp protrusions 6 can be eliminated, so that the corners of the electrode plate do not damage the separator. It is possible to prevent short circuit.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic view showing a manufacturing process of an expanded electrode plate.

FIG. 2 is a plan view of the expanded electrode plate of the present invention after punching in the first embodiment.

FIG. 3 is a plan view of the expanded electrode plate of the present invention after cutting in the first embodiment.

FIG. 4 is a plan view of the expanded electrode plate of the present invention after cutting in the second embodiment.

In FIGS. 2, 3 and 4, 3 is a frame bone, and 1 is a notch provided at a corner of the electrode plate. 2 is a flat cutting margin at the tip of the notch.

In the second embodiment, the notch is curved, and the shape of the notch is not limited as long as the corners are smooth.

[0016]

The electrode plate according to the present invention, when assembling the electrode plate group of the storage battery by cutting the upper and lower frame bone notches which are the corners of the electrode plate and the flat cutting margin of the notch tip, Alternatively, even if the corners of the electrode plate come into contact with the separator during use of the storage battery, it is possible to prevent the separator from being damaged.

In addition, according to the manufacturing method of the present invention, since the permissible positional deviation range of cutting can be increased in the cutting step, the cutting width adjustment of the cutting machine does not require strictness, and the die changing operation There is a side effect that makes it easier.

Furthermore, the method of manufacturing the electrode plate for a storage battery of the present invention is not limited to the expanded electrode plate, but is manufactured by a method of forming a continuous strip shape and cutting it to a predetermined size to obtain a unit electrode plate. It can also be applied to other pole plates, such as punched pole plates.

[Brief description of drawings]

FIG. 1 is a schematic view showing a manufacturing process of an expanded electrode plate.

FIG. 2 is a plan view of the expanded electrode plate of the present invention after punching in the first embodiment.

FIG. 3 is a plan view of the expanded electrode plate of the present invention after cutting in the first embodiment.

FIG. 4 is a plan view of the expanded electrode plate of the present invention after cutting in a second embodiment.

FIG. 5 is a plan view showing a conventional expanded electrode plate.

FIG. 6 is a plan view showing a conventional expanded electrode plate having a notch formed therein.

FIG. 7 is a plan view showing a conventional expanded electrode plate having a cutout, in which the cutting position is displaced.

[Explanation of symbols]

 1 shows a notch. 2 shows a flat cutting margin. 3 shows a frame bone. 4 shows a mesh development part. 5 shows the plate ears. 6 shows protrusions. 7 Development process 8 Punching process 9 Active material filling process 10 Cutting process 11 Lead alloy sheet 12 Pole plate angle

Claims (1)

[Claims] 1. A method of manufacturing a storage battery electrode plate, comprising a continuous band shape, and cutting a notch portion formed at a predetermined dimension to obtain a unit electrode plate, wherein a tip portion of the notch (1) is provided. A flat cutting allowance (2) is provided, and this flat cutting allowance (2)
A method of manufacturing an electrode plate for a storage battery, which comprises cutting.