JP3807153B2 - Electrode foil strip winding device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a winding device for winding a battery, a capacitor or the like (hereinafter simply referred to as “battery”) composed of a separator and an electrode into a rectangular shape, a flat shape, or a round shape. .
[0002]
[Prior art]
Conventionally, the battery has been wound into a round shape and then shaped into a square shape or a flat shape by a method such as pressing (FIG. 1).
In order to wind up into a round shape, a round core is used for winding. This is because the method of winding the material around the core is simple when winding continuously. However, what should be noted here is that it is desirable that the dimension of the winding start portion indicated by * in FIG. 2 is as small as possible. This is because, in general, after cutting with a cutter, the portion * when winding with a winding core is a waste portion and is a portion that is folded back, and the leading end portion is a cause of winding disturbance and the like.
[0003]
[Problems to be solved by the invention]
Therefore, in order to eliminate waste and to avoid turbulence, it is desirable that the portion * is as small as possible or 0.
For the above reason, especially when winding into a square or flat shape, the square or flat core for winding the square or flat shape is more natural than the round shape as compared with the same volume ratio in FIG. Since the size of the portion becomes larger, it becomes a further disadvantageous condition.
[0004]
As a result of earnest research, the inventor of the present application has solved the problem by setting the size of the portion marked with * to 0 with the apparatus described in FIGS. This apparatus is also effective in obtaining a round winding element having a winding core with a round winding core.
Further, when the conventional technique has a square or flat core, the winding method and apparatus are very complicated and technically difficult. However, such technical difficulties can be solved by the apparatus of the present invention. Obtained.
[0005]
[Means for Solving the Problems]
3 to 7, the core shaft rotor 3 having the cores 1 and 2 that can be moved backward from the surface of the figure, the core shaft rotor 3 moves from the periphery of the core shaft rotor 3 to the center position, and is in contact with each other. From presser base 4 and hot plate (cutter) 5 for pressing and welding and cutting the separator, rollers 6 and 7 for guiding the separator to the core, and insertion clampers 8 and 9 for holding and inserting the electrode foil strip The separator and the winding core are disposed so that the heat-welded starting end of the separator that is configured is held in the winding core, and a waste portion at the beginning of winding of the separator having means for pulling back so as to hold the starting end in the winding core is eliminated. The present invention relates to an electrode foil strip winding device.
In order to understand the aspect of the apparatus of the present invention, the process of operation will be described below with reference to FIGS.
FIG. 3 shows a state at the time when the winding operation is completed. As shown in the figure, there are the cores 1 and 2 along the periphery of the core shaft rotor 3, and the presser base 4 and the hot plate 5 are disposed on the center line AB. A roller 6, an insertion clamper 8, a roller 7, and an insertion clamper 9 are provided on the outer side of the core rotor 3. The separators 11 and 12 are guided to the core 2 by rollers 6 and 7, respectively, and the electrode foil strips 13 and 14 are held at the ends by insertion clampers 8 and 9, respectively.
[0006]
FIG. 4 shows a state when the start of winding is instructed. The presser base 4 moves toward the center. The winding core 1 sandwiches the separator 12 in the slit portion. The hot plate 5 moves toward the center and comes into contact with the presser base 4 to thermally cut the separators 11 and 12 between them, and the cut ends of the separators 11 and 12 are heat-welded. In addition, although the temperature of a hot plate changes with materials, 180-200 degreeC is suitable temperature.
[0007]
FIG. 5 shows the state at the time of thermal cutting and thermal welding. The separators 11 and 12 that have been thermally cut and thermally welded are pulled back to the illustrated position of the core 1 by back tension. The hot plate 5 returns to the original position.
FIG. 6 shows a state at the time when the hot plate 5 returns to its original position and the presser plate 4 returns to its original position. The winding core 1 rotates in the direction of the mark and winds up the separators 11 and 12 (winds up the first winding until the electrode foil strips 13 and 14 are wound up). The winding core 2 rotates in the direction of the mark, and the winding is stopped by heat welding with an adhesive tape or a heater.
[0008]
FIG. 7 shows a state when the first winding of the winding core 1 is completed. At this time, the electrode foil strips 13 and 14 are wound up. The electrode foil strips 13 and 14 are cut and separated at a prescribed position at the point where a prescribed amount of winding has been performed. When the winding is completed, the winding core 2 moves backward to remove the wound element. When the above operations of the cores 1 and 2 are completed, the core shaft rotor 3 rotates 180 ° in the direction of the mark and returns to the state shown in FIG. 3 to complete the winding operation.
[0009]
With the electrode foil strip winding device of the present invention, the portion marked with * that could not be eliminated by the conventional device and method can be eliminated, and winding disturbance can be easily prevented.
[Brief description of the drawings]
FIG. 1 is a view showing a conventional molding method in which a round shape is wound and then pressed into a square shape or a flat shape.
FIG. 2 is a view showing a mode in which a waste portion * is generated when winding after cutting by a conventional method.
3 to 7 are explanatory views of an operation process of the electrode foil strip winding device of the present invention.
[Explanation of symbols]
1 Winding Core 2 Winding Core 3 Core Shaft Rotor 4 Presser Base 5 Hot Plate (Cutter)
6 Roller 7 Insertion clamper 8 Roller 9 Insertion clamper 11 Separator 12 Separator 13 Electrode foil strip 14 Electrode foil strip

Claims (1)

  A core rotor having a movable core, a presser base, a hot plate (cutter), and a separator that move from the periphery of the core rotor to the center position and contact each other to hold, weld, and cut the separator The use of a roller for guiding to the core and an insertion clamper for holding and inserting the electrode foil strip, and having a means for pulling back the heat-welded start end of the separator to the core eliminates a waste portion at the start of the separator. An electrode foil strip winding device.

Images