JPS5966055A - Method of manufacturing soft metal electrode - Google Patents

Abstract

PURPOSE:To improve application efficiency of material by forming a soft metal electrode of a lithium battery through the process that polygonal metal segments are punched out from a raw material sheet of soft metal and such segments are rolled under pressure into the desired shape. CONSTITUTION:In case of forming a lithium electrode for a button type lithium battery, hexagonal lithium segments 4 are punched out from a lithium raw material sheet 1. Thereafter, these segments are arranged at the internal bottom surface of sealing cover 5 which is also used as the negative terminal, and these are formed under pressure into almost circular shape by a pressurizing jig 6. The appalication efficiency of material can be improved up to almost 90% by punching the hexagonal sheets and forming them into circular sheets through utilization of the characteristic of lithium the deformable under pressure. Accordingly, loss of material can be reduced drastically.

Description

[Detailed description of the invention] Technical field The present invention relates to a method for manufacturing a soft metal electrode.

Lithium batteries are well known as a battery that uses a metal as a pole.

For example, lithium electrodes can be produced by punching a lithium raw material plate into a fixed shape without requiring complicated processes such as those used for sintered or paste-type nickel electrodes and cadmium electrodes in Nickel-cadmium batteries. It has the advantage that it can be used in many ways.

Specifically, lithium electrodes for button-shaped lithium batteries are conventionally made by punching circular lithium plates (21 mm) from lithium raw material swash plate (1), as shown in Figure 1. In the punching process, in order to increase the material usage efficiency as much as possible, for example, even if the punching is done in a staggered manner, the shaded area 13) becomes a loss and the material usage efficiency is about 70 inches IW at most.

DISCLOSURE OF THE INVENTION The present invention has been made in order to eliminate the problem of bright spot in the conventional method mentioned above (it is aimed at the property of soft metals that can be deformed under pressure).

That is, the present invention improves the IJ material utilization efficiency by punching out polygonal metal pieces from a soft metal raw material board (thereby increasing the IJ material utilization efficiency compared to the case of punching out circular metal pieces in the first factor). Soft metal machine 1, which is characterized by the polygonal shape of the outer hem, which can be extended into a desired shape that can be used as a battery electrode, proposes a method for manufacturing electrodes. .

EXAMPLE Below, an example of the method of the present invention will be described in detail. J Naum 1 prefecture shrine board (1
) Hexagonal lithium pieces (4) are punched out. This punching method results in loss in the shaded area (3), but the efficiency for material 11 is approximately 91], which is more than the conventional method shown in Figure 1.
Improved to 11.

And, I! This hexagonal lithium piece (4) shown in Figure J6 is a button-shaped lithium piece (4) as shown in Figure 4.
Place the lid (51) on the inner bend of the lid (51) and pressurize and deform it into the approximately circular shape indicated by the broken line (1) using the pressure jig 1 to form a lithium IA electrode. When deforming with pressure, use a separate 711.1 fE jig to deform it into the desired shape, and then insert the negative electrode terminal into the inner part of the palate. good.

Effects of the Invention According to the present invention, Li, Na, Oa, Pi (Zn,
When using a soft metal 7-ton pole such as A/', On, #t/
1: Temporary metal core abrasive Material specification II , when punching out a circular 1st-shaped piece from a raw material plate to create a pole with a circular shape of 1゛, the ratio can be reduced to ``c phase material ronu χ + lj, and the same as above for the material utilization rate is i. Its industrial value is extremely human.

In this example, a hexagonal shape is shown as a polygonal shape, but in the case where the final electrode shape is circular, there is an advantage that if the final electrode is punched into a polygonal shape that is closer to a circle, it will be easier to obtain a circular electrode when pressurizing. be.

[Brief explanation of drawings]

Fig. 1 shows the conventional punching method, Fig. 2 to Fig. 4 relate to the present invention, Fig. 2 shows the method of the present invention (two punching methods), and Fig. 5 shows the lithium piece. The perspective view and FIG. 4 are cross-sectional views for explaining the pressurized deformation process χ in the lid 1j2 of the lithium piece χ seal 1 in Figure 3. (11... Soft metal raw material Plate, (3)...Material loss part, (41...Lithium piece, (51...Sealing rose, (6)...J) Former Kamiji (↓0 Figure 1 Figure 2 Figure 8 Figure 4

Claims (1)

[Scope of Claims] (Soft metal raw material L: Manufacture of soft metal electrodes by punching a polygonal metal piece from a sheet, pressing and rolling the metal piece into a desired shape (deformation processing) ■ 1111 A method for producing a soft metal electrode in which the desired shape is approximately circular! Ya r
b, 'l, n, A/? , Q+1, the method for producing a soft metal 1-R pole according to claim 0.