JPS58214275A - Manufacture of electrode substrate for storage battery - Google Patents

Abstract

PURPOSE:To efficiently provide a punched substrate which can fill relatively large amount of active mass by punching the substrate so as to have one or more projected strip and an adjacent concave plate from a metal strip having more than one projected strip and a concave plate for filling an active mass in between. CONSTITUTION:An electrode substrate A is punched so as to form a lug 5 from one projected strip 2 and a pair of feet 6 from the other projected strip 2. The substrate A has projected frames formed from the projected strip 2 in the upper and lower ends, but does not have projected frames on the left and right sides, and both sides of a concave plate pass through to the outside. The concave plate 3 of the substrate A is filled with an active mass to the height of the projected strip. Since the both sides of the active mass layer pass through the outside, when the substrate is used as a sintered plate in a battery, the electrolyte can directly contact the active mass on its both sides to provide good performance.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing sintered and other storage battery electrode substrates.

In recent years, porous substrates punched from metal plates have been manufactured as electrode substrates. In this manufacturing method, a large number of rectangular concave thin plate surface parts are compression molded at intervals on a flat metal strip-like plate surface, and then the outer periphery of the concave thin plate surface parts is punched into a substrate shape to obtain an electrode substrate with a rectangular protruding frame on the outer periphery. Since this method produces a relatively large amount of scrap from punching out the band-shaped plate, the shape of the substrate has rectangular projecting frames around its four peripheries, so the active material is optically coated on the concave surface of the inside to form electrodes. When manufactured, the applied active material layer is surrounded by its outer circumferential projecting frame, and in its use, its four circumferential sides bring about disadvantages such as hindering contact with the electrolytic solution.

The present invention provides a method for manufacturing an electrode substrate for a storage battery without such inconvenience, and is made from at least a suitably wide metal strip plate consisting of a plurality of protrusions and a suitably wide concave plate surface between them. It is characterized in that the substrate is punched across one of the protrusions and the concave plate surface.

Embodiments of the present invention will be described with reference to the accompanying drawings.

In FIG. 1, (1) indicates a metal strip plate. The strip plate is
By casting, rolling, etc., it has a shape with a protrusion (2) (2) having a predetermined wide width and an appropriate tape-like width on both sides, and a concave plate surface (3) with a predetermined wide width in the middle. It is being created. This strip plate (1) is intermittently moved to one side by a conveyor, etc., and a punching device (not shown) provided at the other end
Then, as shown by the chain line in Fig. 1, the electrode substrate is punched out in a predetermined shape without gaps in the length direction and spanning the concave plate surface (3) and the protrusions on both sides thereof.

In the drawing, (4) shows a number of small active material filling holes formed in the concave plate surface (3), which may be formed after punching the substrate. In punching each board,
An ear portion (5) is punched from one of the protrusions (2), and a pair of leg portions (6) (6) are formed by punching from the other protrusion (2), as shown in the second figure. An electrode substrate product A is obtained.

Thus, the substrate A has the protrusions (2) (
It has a projecting frame according to 2), but there are no projecting frames on the left and right sides,
The same side of the concave plate surface (3) is provided as communicating with the outside. Thus, the concave plate surface (3) of the substrate A is filled and coated with an active material by a conventional method, and the active material up to the height of the protrusion (2) (2) is used as a sintered electrode plate to form a battery. When used in the battery, the electrolyte directly contacts the active material layer on both sides, resulting in good battery operation. FIG. 6 shows an example of a pond,
A punched substrate A is shown that is punched across one protrusion (2) and a concave plate (3), and has the protrusion (2) only on the upper edge and lacks the protrusion on the lower edge. This further improves contact with the electrolyte.

Figure 4 further shows an example of a pond, with five protrusions (2) (
2) (2) and two wide concave plates (3) (
3) The belt-shaped plate (1) consisting of the following is sequentially punched to obtain two punched substrates A and A at a time.

As an example, the thickness of the concave plate (3) of the strip plate (1) is, for example, 0.08111II11, and the thickness of the protrusion (2) is 0.15.
Use brocade. The protrusion (2) may be a bent protrusion having an arcuate cross section or the like, which is formed by bending and protruding the band-shaped plate (1) upward by applying pressure and bending in advance. Of course, the protrusion (2) may be one that protrudes upward and downward from the concave plate (3) as shown in the fourth figure.

As described above, according to the present invention, at least one of the protrusions and the concave plate surface adjacent to the metal strip plate having a plurality of protrusions and a concave plate surface adjacent to the protrusion is formed from a metal strip plate having a plurality of protrusions and a concave plate surface for filling the active material in the middle. By punching across the substrate, a comparatively large amount of active material is retained in the thick substrate due to the protrusions, and a punched substrate can be obtained with less waste compared to the conventional method. This has the advantage of being able to provide an electrode in which both sides of the filled active material layer are in good contact with the electrolytic solution.

[Brief explanation of the drawing]

Fig. 1 is a slope diagram showing the embodiment of the nature, Fig. 2 is a slope diagram of the product, Fig. 3 is a slope diagram of the product according to the Noh embodiment, and Fig. 4 is a slope diagram showing the pond embodiment. It is. (1)・・・Metal band plate (2)・・・Protrusion (projection frame) (3)・・・Concave plate (4)′・・・Perforation 2 people outside

Claims (1)

[Claims] A substrate is punched out from a suitably wide metal band-like plate consisting of a plurality of protrusions and a suitably wide concave plate surface between them, spanning at least one protrusion and the concave plate surface. A method for manufacturing electrode substrates for storage batteries.