JPS59219868A - Manufacture of nickel cadmium storage battery - Google Patents

Abstract

PURPOSE:To uniformly wind an electrode plate group to decrease fraction defective by strongly applying back tension which is applied in parallel to winding direction of electrodes plates at the beginning of winding and weakly applying it at the end of winding. CONSTITUTION:A separator 2 is passed through a winding shaft 1, and a cathode plate 3 and an anode plate 4 are inserted and placed between plate pressing tools 13 and 14, then pushed in arrow directions 5 and 6. After they are wound one or two times in an arrow direction 7, upper and lower rollers 8 and 9 are moved in arrow directions 10 and 11 to press the wound part. Plate pressing tools 13 and 14 are opened and each of winding ends of the cathode plate 3 and the anode plate 4 is pressed with plate pressing tools 12 and 15, and an electrode plate group is wound with back tension applied to tools 12 and 15 in arrow directions 16 and 17. As the outer diameter of the plate group is increased, back tension during winding is decreased. When winding ends are wound, the plate pressing tools 12 and 15 are opened.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a nickel-cadmium storage battery in which an anode plate and a cathode plate are spirally wound through a separator to form a group of electrode plates.

In general, the necessary conditions that must be satisfied for this type of electrode plate group are: 1) The shape should be as cylindrical as possible, that is, it should not be rolled up into an ellipse, and the anode plate and cathode plate should be placed on the top and bottom surfaces of the cylinder. - The anode plate and the cathode plate should not be rolled up unevenly, that is, there should be no misalignment in the width direction of the anode and cathode plates. - Similarly, the separator should not be rolled up - - The outer diameter of the upper and lower ends that are rolled up into a cylindrical shape should be (1) The adhesion pressure between the anode plate and the cathode plate through the separator must be uniform.1 to 5 points.

The method of the winding process is shown in FIG.

Pass the separator 2 through the winding shaft l, insert the anode plate 3 and the cathode plate 4, push them in the directions of arrows 5 and 6, and wind them 1 to 2 times in the direction of arrow 7, then turn the upper and lower rollers 8 and 9, respectively. The electrode plates are moved in the directions of arrows 10 and 11 and wound while applying pressure to the winding portions, and the electrode plate pressing jigs 13 and 14 are used to push the winding start portions of the anode plate 3 and cathode plate 4 in the directions of arrows 5 and 6. Then, in the direction of arrows 16 and 17, press the plate holding jig 12,
15, back tension is applied parallel to the winding direction of the electrode plate.

Conventionally, the back tension saw used the same force from the beginning to the end of winding.

The present invention is characterized in that it is strong at the beginning of winding and weak at the end of winding.

An embodiment of the present invention will be described.

According to FIG. 2, when the rotational torque FXL of the winding shaft 1 is constant, the electrode plate is wound around the winding shaft 1.

The outer diameter of the electrode plate group is large (I see, the force F at the outer periphery
becomes smaller.

In view of the above-mentioned conditions necessary for the electrode plate group, it is desirable that the magnitude of the force obtained by subtracting the back tension force from this force F is constant regardless of the size of the outer diameter of the electrode plate group.

Therefore, in the present invention, the force of the back tension is large at the beginning of winding up, and the tension is reduced as the winding progresses.

The process steps are as follows. After passing the separator 2 through the winding shaft 1 and winding the cathode plate 3 and the cathode plate 4 once or twice in the direction of the arrow 7, the anode plate 3 and the cathode plate 4 are separated using the upper and lower row tools 12 and 15. Hold the end of each winding, apply back tension in the direction of the arrow 16 and 15 to each of these jigs 12 and 15, and wind the electrode plate group to increase the outer diameter 1.
At this point, wind it while weakening the back tension.

At the time of winding the end of winding, the electrode plate holding jig 12.1
Open 5.

- As an example, the present invention is implemented with one KR-C type nickel-cadmium storage battery, and the back tension force is applied from 4 o'clock to the 15th floor so that the force is 4 at the beginning of winding and 1.51'f at the end of winding. When winding was performed by decreasing the number of wires in sequence, the defect rate of 0.296 in the conventional method could be reduced to 0.013%.

As described above, the present invention has great industrial value in that the electrode plate group can be wound uniformly and the defective rate of nickel-cadmium storage batteries can be significantly reduced.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the winding method of the electrode plate group, and FIG. 2 is a diagram illustrating the principle of the present invention. 1 is the winding shaft, 2 is the separator, and 3 is the anode plate. 4 is a cathode plate, 5, 6.7 are arrows, 8.9 is an upper and lower roller, and 10.11 is an arrow. ] 2.13, 14.15 are electrode plate holding jigs. 16.17 is the arrow Patent applicant Figure 1 Figure 2

Claims (1)

[Claims] A method for producing a nickel-cadmium storage battery characterized in that in the process of winding an anode plate and a cathode plate in a spiral shape with a separator interposed therebetween, the anode plate and the cathode plate are wound around a winding shaft, and a back is attached to each of the plates. .