JPS607073A - Manufacture of cylindrical alkaline storage battery - Google Patents

Abstract

PURPOSE:To make contact of plate group with a battery case good by winding an adhesive tape in the ouer center of a plate group prepared by winding to tighten the plate group, and inserting a part of the plate group into the battery case, and cutting the tape, then completely inserting the plate group. CONSTITUTION:Belt-shaped cathode 1, anode plate 2, and separator 3 are wound to form a plate group of cylindrical alkaline storage battery. A synthetic resin adhesive tape 4 is wound in the outer center of the plate group so that the outer diameter of the plate group is smaller than the inner diameter of a battery case 5. After a part of the lower part of the plate group is inserted into the opening 6 of the can 5, a part of the tape 4 is cut with a cutter, and as the tape is attached, the plate group is inserted with the plate group 1oosened to the bottom 7 of the case 5. Therefore, contact of the anode plate 2 located on the outer side of the plate group with the can 5 is increased and internal resistance of the battery is decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a cylindrical alkaline storage battery in which a group of spirally wound electrode plates including a band-shaped anode plate and a cathode plate with a separator interposed therebetween is inserted into a battery case.

Usually, the electrode plate group in a cylindrical alkaline storage battery consists of band-shaped positive and negative electrode plates that are wound in a spiral shape with a separator interposed between them, and then inserted into a battery can.

At the same time as the electrode plate group is wound, its outer periphery is tightened with synthetic resin adhesive tape and inserted into the battery case, but a margin is provided for the dimensional difference between the inner diameter of the battery case and the outer diameter of the electrode plate group to facilitate insertion. When used as a battery, the contact resistance between the inner wall of the battery case and the cathode plate on the outer periphery of the electrode plate group increases, resulting in poor battery performance. Therefore, methods such as removing the adhesive tape after inserting a part of the electrode plate group have been used, but this removal is time-consuming, slows down production speed, and complicates the insertion equipment. There were other drawbacks.

The present invention solves these conventional problems, and examples thereof will be described below.

In the drawing, 1 is a band-shaped anode plate, 2 is a cathode plate, and 3 is a separator made of synthetic resin fiber interposed between the two. Immediately after winding the spiral rod ζ electrode plate group, Wrap the outer circumference with adhesive tape 4 so that the diameter is slightly smaller than the inner diameter of the battery end 5 to be inserted, and wrap it tightly.
As shown in Figure 1, after slightly inserting the lower part of the electrode group into the opening 6 of the battery end 5 in the direction shown by the arrow, insert it completely until the lower part of the electrode group reaches the bottom 7 of the force 5. After one insertion, the contact between the battery end 5 and the cathode plate 2 located on the outer periphery of the electrode plate group is extremely good due to the repulsion force of the electrode plate, and the internal resistance characteristics of the battery are also improved. This adhesive tape 4 is cut at the second position.
As shown by number 8 in the figure, by cutting at the outer peripheral surface of the separator 3, the loosening of the electrode plate group is maximized and the internal resistance is minimized, so that the best battery characteristics can be obtained. This is because the material of the separator 3 is a deformable material such as fiber, and cutting at this portion causes the electrode plate to bend back and easily open the gap between the cut surfaces of the adhesive tape.

In Fig. 2, 9 is a tab that is connected to the anode plate 1, and is welded to the top cover of the battery (which is fixed to the opening 6 of the battery end 5 via an insulating backing) which also serves as the anode terminal during the battery assembly process. be done.

As described above, according to the present invention, the electrode plate group can be easily inserted into the battery end without removing the adhesive tape, and the cathode plate located on the outer periphery of the electrode plate group and the battery end can be easily inserted. This has great industrial value, as it improves the battery performance by making contact with the battery.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of the electrode plate group of a cylindrical alkaline storage battery according to an embodiment of the present invention, and FIG. 2 is a side explanatory view of the electrode plate group partially inserted into the battery can. 1 is an anode plate, 2 is a cathode plate, and 3 is a separator. 4 is adhesive tape, 5 is battery end body 4 -θ

Claims (1)

[Scope of Claims] 1. After wrapping an adhesive tape around the outer periphery of a group of electrode plates in which band-shaped anode plates and cathode plates are spirally wound with a separator in between to tighten the electrode plate, the electrode plate is inserted into a battery can. A method for manufacturing a cylindrical alkaline storage battery, which comprises inserting a part of the electrode plate group, and then inserting the entire electrode plate group into a battery case while cutting the adhesive tape with a cutter. 2. The cylindrical alkaline storage battery according to claim 1, wherein when cutting the adhesive tape with a cutter, the cut is made at a portion where the adhesive tape wrapped around the outer periphery of the electrode plate group is adhered to the separator. manufacturing method.