JPS61273874A - Manufacture of vortical electrode - Google Patents

Abstract

PURPOSE:To provide a simple and reliable manufacturing method, by providing electric insulator bands on the wound portion of a separation plate to prevent the short circuit of electrode plates. CONSTITUTION:A positive electrode plate 2 and a negative electrode plate 3 are vortically wound together with a separation plate 1. Electric insulator bands 8 are bonded on both the sides of the separation plate near the center of the wound portion of the positive electrode plate so that the bands prevent the separation plate from being damaged by the front edges of the positive and the negative electrode plates. In a method of manufacturing a vortical electrode 9, the separation plate 1 sent out of a separation plate roll 6 is first entered into a winding shaft 4. When the plate 1 is wound by a prescribed length on the shaft 4, the bands 8 are sent out of band rolls 11 so that the bands are bonded on both the sides of the plate 1 by push rollers 12 and moved through the shaft 4. At that time, the positive and the negative electrode plates 2, 3 are inserted from both the sides of the shaft 4. The vortical electrode 9 is thus manufactured. The method is simple and so reliable that the ratio of defects of the vortical electrodes during their manufacturing and use is low.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in the electrode structure of a battery using a spiral electrode body.

2. Prior Art A conventional spiral electrode body consists of one separator plate 1, as shown in FIG.
It is manufactured by winding up the anode plate 2 and the cathode plate 3 in a spiral shape by a winding shaft 4, and therefore the separation plate 1 interposed between the anode plate 2 and the cathode plate 3 has a single layer structure. . However, the plates are separated
Compared to separation plate 1, it is stiffer (harder to bend), so the moment the tip of the electrode plate gets caught up in separator plate 1, the edge of the tip of the electrode plate damages separator plate 1, causing the plates to partially touch. In order to solve this problem, o5 is a pressure roller and 6 is a separator hoop.
As shown in the figure, a method is adopted to prevent short circuits due to damage to the separator plate 1 by pasting insulating tape 7 on the tip end of the electrode plate and rubbing it so that the electrode plate does not damage the separator l. It had been. A method has also been adopted in which the separators near the winding shaft are overlapped to form a double structure to prevent short circuits due to damage to the separators.

Problems to be Solved by the Invention The method shown in FIG. 4 requires a large number of man-hours to apply the insulating tape 7 to the winding start ends of each of the anode plate 2 and the cathode plate 3. Furthermore, when the separator has a double structure, it is difficult to overlap the two separators accurately, and this requires a lot of man-hours such as fusing the two separators together.

Means for Solving the Problems The present invention eliminates the above-mentioned drawbacks. The anode plate and the cathode plate are spirally wound together with a separator, and an insulating tape or the like is placed near the center of the winding of the anode plate. The structure is equipped with an insulator.

The surface of the working separator is protected to prevent the separator from being damaged by the edge of the electrode plate and causing a short circuit failure.

The embodiment separator 1 is pulled out from the winding shaft 4 by three additional dimensions as shown in FIG. 3 in a manner similar to that shown in FIG. On the other hand, the insulating tape 8 serving as an insulating band is pulled out by a length shorter than the separator 1 and adhered to both sides of the separator 1. Next, a pair of divided winding shafts 4 is inserted into the center of the triple-layered part.
5. ．． The spiral electrode body 9 as shown in FIG. 1 is obtained by rotating the winding shaft 4 while pressing the pressure roller 5 and inserting the anode plate 2 and the cathode plate 3.

One feature of the present invention is that in the next step, in the conventional method, a welding rod is inserted into the hole made by the winding shaft 4 to weld the lower terminal of the cathode plate 3 to the inner bottom of the electric or oil container. However, at that time, there was a problem that the fibers of the separator l adhered to the welding rod, but by pasting an insulator 8 such as insulating tape on the surface of the separator, such gaps [
This also improves welding reliability.

Note that 10 is a cutter, 11 is an insulator hoop, and 12 is a presser roller.

Effects of the Invention As mentioned above, according to the present invention, it is possible to prevent short-circuit defects due to damage to the separator, reduce defects during the manufacturing process, greatly improve reliability during battery use, and reduce manufacturing man-hours. It is a great industrial value base.

[Brief explanation of drawings]

Claims (1)

[Claims] A method for manufacturing a spiral electrode body, comprising providing an insulating band at a desired portion of the spiral electrode body where a separator is wound.