JP2002198084A - Cell element winding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve shortcomings arising from unification of a tab-attaching device and a winding device. SOLUTION: The cell element winding device, composed of electrode pay-out shafts 1 and 2, a separator 3, electrode tab connection 5 and 6, electrode cutting insertion sections 7 and 8, a winding shaft unit 9, a wound-out tape pay-out shaft 10, a wound-out tape pasting unit 11, an element take-out unit 12 and an element conveyer 13, is structured with a means exclusively for tab attaching consisting of an electrode connection section separated from the electrode tab connections 5 and 6 and a means exclusively for winding-up composed of other sections.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding device for a battery element used for winding a battery element comprising an electrode and a separator.

[0002]

2. Description of the Related Art A winding device for a battery element generally comprises the following units 1-13 as shown in FIG. Electrode 1 unwinding shaft (1), Electrode 2 unwinding shaft (2), Separator 1 (3), Separator 2 (4), Electrode 1 tab connection (5), Electrode 2 tab connection (6), Electrode 1 Cutting insertion section (7), electrode 2 cutting insertion section (8), winding shaft unit (9), winding tape unwinding shaft (10), winding tape attaching unit (11), element take-out unit (1)
2), an element transport unit (13). Here, the numbers in parentheses are the numbers in the drawings.

[0003] A battery element is formed by winding electrodes 1 and 2 and separators 3 and 4 on a winding shaft 9a. In the process, the tabs 5 and 6 are connected to predetermined positions of the electrodes 1 and 2 before winding. Thereafter, the battery element wound by the winding shaft 9a moves to 9b, and the electrodes 1, 2, 3, 4 and the separator are cut and separated (not shown in the figure). To perform winding of the battery element. After completion of the winding stop, the process moves to 9c, and the battery element is taken out by the element take-out unit 12, and then the electronic element is conveyed to the next step by the element conveyer 13.

[0004] This integrated winding device combines a tab setting device and a winding device into a single unit, and is the most effective method when mass exchange is small in terms of product type from the viewpoint of production. . However, this structure has the following defects due to the method for mass production. (B) In addition to tab adjustment and winding adjustment at the time of product changeover, adjustments to maintain their mutual relationships (positioning accuracy)
It takes twice as long. (B) Since the operation steps (time) of tabbing and winding are not 1: 1 but unbalanced, the efficiency of the apparatus is not good. (C) Even if a defect occurs in any one of the tab attaching and winding steps, a product defect occurs as a result, so that the operation rate and the yield of the apparatus are reduced. (D) In order to integrate the equipment, the whole equipment becomes larger,
Therefore, although the shortest distance is the principle, the distance from the material setting shaft to the winding shaft becomes long, which is affected by the quality and accuracy of the winding element, and there is also a material loss.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a winding device for a battery element free of such defects.

[0006]

Means for Solving the Problems As a result of earnest research, the present inventor has conceived of dividing the electrode tab connecting portion from the device main body and dedicating the tab connecting portion to avoid these disadvantages due to integration. The invention has been reached.

In the present invention, in FIG. 1, an electrode 1 unwinding shaft (1), an electrode 2 unwinding shaft (2), a separator 1
(3) and separator 2 (4), electrode 1 tab connection section (5), electrode 2 tab connection section (6), electrode 1 cutting insertion section (7), electrode 2 cutting insertion section (8), winding shaft unit (9), winding tape unwinding shaft (10), winding tape attaching unit (11), element take-out unit (1
2) and a battery element winding device comprising an element transport conveyor (13), wherein the electrode tab connection portions (5) and (6)
The present invention relates to a winding device for a battery element, comprising: a tab-dedicated means comprising an electrode tab connection portion; and a winding-dedicated means comprising other portions. Here, the numbers in parentheses are the numbers in the drawings.

[0008] That is, the present invention comprises a tab attaching means as shown in FIG. 2 and a winding means as shown in FIG. In the tab attaching means, the electrode wound around the electrode unwinding shaft 1-1 is tab-attached at the tab connecting portion 5 and the electrode winding shaft 1--1.
It is wound up at 2. When tabbing is completed on all the electrodes, the electrodes 1-2 are removed, and the electrodes are wound by a winding-only means in the next step.

In the winding-only means, the electrodes tabbed by the tab-only means are attached to the electrode unwinding shafts 1 and 2 and cut into predetermined lengths by the electrode cutting and inserting portions 7 and 8, and are inserted. The winding is taken up through the separators 3 and 4, taken out and transported to the next step.

The winding device for a battery element of the present invention is divided into two parts, a dedicated tab attaching means and a dedicated winding means, so that the disadvantages of the conventional integrated apparatus can be sufficiently compensated. The above-mentioned disadvantages (a) to (d) can be supplemented and the following advantages can be obtained. (E) The structure of each device can be simplified. (F) Complex detection and data setting of the conventional integrated device can be simplified. (G) Since no special operation or driving skill is required, anyone can drive and operate with a little training.

In the present invention, as shown in FIG. 4, an electrode material is applied at regular intervals by a winding tape, and an applied portion (101) and an uncoated portion (102) are alternately formed. Have been. By the way, the electrode material is aluminum foil and copper foil, and the electrode material is active material (lithium, nickel hydride, etc.)
Is used. Then, as shown in FIGS. 5 and 7, the tab (103) is connected to the non-coated portion (102). For connection, ultrasonic welding, spot welding, or the like is used. The tabbed electrodes 1 and 2 are superposed on the separators 3 and 4 and wound up to form a battery element having a shape as shown in FIG.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a winding device for a battery element.

FIG. 2 is a schematic view of a dedicated tab attaching means in the apparatus of the present invention.

FIG. 3 is a schematic view of a winding-only means in the apparatus of the present invention.

FIG. 4 is a schematic explanatory view of an electrode.

FIG. 5 is an explanatory view showing tab attachment of electrodes.

FIG. 6 is a schematic diagram of an electronic element.

FIG. 7 is an explanatory view showing tab attachment of electrodes.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 electrode 1 unwinding shaft 2 electrode 2 unwinding shaft 3 separator 1 unwinding shaft 4 separator 2 unwinding shaft 5 electrode 1 tab connection part 6 electrode 2 tab connection part 7 electrode 1 cutting insertion part 8 electrode 2 cutting insertion part 9 winding Take-up shaft unit 10 Winding tape unwinding shaft 11 Winding tape attaching unit 12 Element take-out unit 13 Element transfer unit 101 Coated part 102 Non-coated part 103 Tab 104 Battery element 105 Tab

Claims (1)

[Claims] 1. Electrode unwinding shafts (1) and (2), separators (3) and (4), electrode tab connecting parts (5) and (6), electrode cutting and inserting parts (7) and (7) in FIG. 8) Winding unit for a battery element comprising a winding shaft unit (9), a winding tape unwinding shaft (10), a winding tape attaching unit (11), an element unloading unit (12), and an element transport conveyor (13). In the apparatus, the electrode tab connection parts (5) and (6) are separated from the apparatus, and are constituted by tab-dedicated means comprising electrode tab connection parts and winding-only means constituted by other parts. Winding device for battery element.