JPH067494B2 - Apparatus for manufacturing storage battery having spiral electrode group - Google Patents

Description

Description: INDUSTRIAL APPLICABILITY The present invention relates to formation of a spiral electrode plate group of a storage battery, and particularly to formation of a spiral electrode plate group used in a cylindrical sealed nickel-cadmium storage battery and insertion into a cylindrical metal case. The present invention relates to a manufacturing device.

2. Description of the Related Art As shown in FIG. 9, a general method for constructing a conventional small-capacity cylindrical sealed nickel-cadmium storage battery is as follows. By inserting the electrode plate group in which the cathode plate 4 and the cathode plate 4 are spirally wound.

At this time, the tab plate 5 is not provided on the cathode plate 4, and the outer peripheral surface of the metal case 1 is brought into contact with the cathode plate 4, and the tab terminal 5 is formed on the anode plate 3 in advance so as to project into the opening 6 of the metal case 1. In a later step, a sealing plate which also serves as a positive electrode terminal is welded to this lead piece.

Next, in the conventional device for forming the spiral electrode plate group, the electrode plate group is simultaneously withdrawn while the pair of winding shafts are pressed by the pressure roller in opposite directions.

Problems to be Solved by the Invention However, in the case of this device, the tab terminals of the anode plate 3 are bent due to the electrode plate group being aligned in the winding axis direction, and the bent tab terminals 5 can be extended straight in a later step. Necessary work. Also, since the shape of the bending position is unstable,
In order to surely bend this into a predetermined position, the tab terminal 5 is tilted toward the center of the electrode plate group by the rod-shaped body 7 having a mortar-shaped recess on the upper end surface in advance as shown in a in FIG. Then, as shown in FIG. 10b, the rod-shaped plunger 9 in the sleeve 8 having a taper on the upper end
A method of advancing and bending in the lateral direction has been proposed (JP-A-59-111275). However, since the tab terminal 5 side of the anode plate will eventually be welded to the sealing plate, it is necessary to erect it again in a later step.

Next, regarding the device for smoothly inserting the spirally wound electrode plate group into the battery can, as shown in FIG. 11, there is an adverse effect when the winding end terminal 10 of the cathode plate 4 is lifted up. Therefore, the adhesive tape 1 for tight is placed below the outer periphery of the electrode plate group.
A proposal has been made to reduce the outer diameter of the electrode plate group by winding 1 (JP-A-60-7072) and a proposal to insert the adhesive tape 11 while cutting it (JP-A-60-7073). However, since the adhesive tape 11 is adhered to these, there is a drawback that the internal resistance characteristic of the storage battery becomes high and the voltage during discharge becomes low.

Means for Solving the Problems The present invention eliminates the above-mentioned drawbacks. Among the pair of winding shafts, the shaft without the tab terminal is extracted, and then the shaft with the tab terminal is extracted. This prevents the electrode plate group from slipping on the side with the tab terminals, prevents bending of the tab terminals, detects the end of winding of the cathode plate, and presses the end position of the cathode plate with the pressure roller. The electrode plate group is smoothly inserted into a metal case without winding an adhesive tape.

The electrode group can be smoothly inserted into the metal case while the tab terminals are upright without winding adhesive tape.

Example FIG. 1 is a front view of a manufacturing apparatus for forming a spiral electrode plate group according to the present invention and inserting the spiral electrode plate group in a cylindrical metal case 1. Reference numeral 12 denotes a rotary table that forms a spiral electrode plate group and is inserted into the metal case 1, and winding jigs A, B, C, D, E, F, and G are provided around the rotary table at equal intervals. There is.

A is a winding station for spirally winding the anode plate 3 and the cathode plate 4 together with the separator 2 as shown in FIG. The spiral electrode plate group 15 that is pressed by the pressure roller 14
Is wound up as. A pair of polar plate chucks 16 and separator chucks 17 are also provided as auxiliary jigs.

B is the cathode plate 4 on the outer periphery of the electrode plate group 15, as shown in FIG.
It is a detection station provided with a photo center 18 for detecting the terminal 10 at the end of winding.

As shown in FIG. 4, C indicates that the end of winding 10 of the cathode plate 4 is pressed by the pressure roller 14 by the signal from the photocenter 18.
This is a winding shaft stop station that stops the rotation of the winding shaft 13 at the position pressed by.

As for D, the winding shaft 13 'which is inserted from the rear side without the tab terminals as shown in FIG. 5 is pulled out by abutting a stopper 19 provided as necessary so that the electrode plate group 15 is not stuck to the rear side. It is a reel removing station.

As shown in FIG. 6, E is a winding shaft removing station for extracting the front winding shaft 13 ″ having the tab terminal 5. Since the winding shaft 13 ′ has already been extracted, the electrode plate group 15 is not added. The pressing roller 14 does not cause the front side to slip, so that the tab terminal 5 is pulled up and the winding shaft 13 ″ is erected without being tilted or damaged.

F is a tab inclining station for slightly inclining the tab terminal 5 in the outer peripheral direction of the electrode plate group 15, as shown in FIG.

Reference numeral G denotes an insertion station into which the electrode plate group 15 is inserted while being guided by the guide roller 22 by the rod 21 protruding into the metal case 1 set at a predetermined position by the rotary table 12 '.

Since the tab terminal 5 is inclined outward in advance, it is possible to avoid bending at the time of insertion.

At the position H, the respective winding jigs are returned to the predetermined positions and the winding starts again at the position A.

EFFECTS OF THE INVENTION As described above, according to the present invention, the work of forming a spirally wound electrode body and inserting the spirally wound electrode body in a metal case can be automated, and at the same time, the damage obstacle of the tab terminal, which has been a harmful effect, can be eliminated. In addition, the work of tightening with adhesive tape can be removed, the characteristics of the battery can be improved, and since the manufacturing process is divided by using the rotary table, it is expected that the manufacturing time can be shortened and the industrial value is extremely high. It is great.

[Brief description of drawings]

FIG. 1 is a schematic front view of a manufacturing apparatus showing an embodiment of the present invention, FIG. 2 is a schematic front view of a winding station, FIG. 3 is a schematic front view of a detection station, and FIG. Front view, FIG. 5 and FIG. 6 are partially cutaway side views of the winding shaft removing station, FIG. 7 is a partially cutaway side view of the tab terminal tilting station, and FIG. 8 is a partially cutaway showing the insertion station. FIG. 9 is a schematic view of a spiral-shaped electrode plate group of a cylindrical nickel-cadmium storage battery inserted in a metal case, and FIG. 10 is a sectional view of a conventional electrode plate group configuration device, in which a is a tab terminal. FIG. 11 is an explanatory view of inclining the tab terminal, and FIG. 11 is an explanatory view of bending the tab terminal in the lateral direction. 1 is a metal case, 2 is a separator, 3 is an anode plate, 4 is a cathode plate, 5 is a tab terminal, 13 is a winding shaft, 13 'is a rear winding shaft, 13 "is a front winding shaft, and 14 is an additional winding shaft. Pressure roller, 15 is an electrode plate group

Claims (2)

[Claims] 1. A spirally wound electrode plate is manufactured by forming a spirally wound electrode plate group formed by winding a strip-shaped anode plate, a cathode plate and a separator, and inserting the spirally wound electrode plate into a metal case. A plurality of winding jigs each consisting of a pair of winding shafts having a semicircular cross section and a pair of pressure rollers which are inserted from the upper and lower parts of the group and face each other so as to have a circular cross section, at equal intervals, In a device formed of a rotary table attached to a peripheral portion, a separator is sandwiched in a gap between a pair of winding shafts, and a pressure roller is brought into contact with the winding shaft in directions opposite to each other. Insert the anode plate and the cathode plate into the gap of the station and rotate the winding shaft to wind up spirally, the station that detects the winding end position of the cathode plate and the position where the pressure roller presses the end of the cathode plate by the detection signal. With a station that stops the rotation of the winding axis with A pair of winding shafts separates the spiral electrode body from the spiral electrode body, one side first, and the other side separately, and a station that tilts the tab terminals protruding from the anode plate outward from the center. An apparatus for manufacturing a storage battery having a spiral electrode plate group, comprising a station for inserting the electrode plate group into a metal case that has been transferred to a predetermined position. 2. When extracting a pair of winding shafts from a spiral electrode plate group, the side of the electrode plate on which no lead piece is present is extracted and the shaft of the electrode plate on the side having the lead piece is extracted. An apparatus for manufacturing a storage battery having the spiral electrode plate group according to claim 1.