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Reeling device

A technology of coiling device and winding mechanism, which is applied in the direction of sustainable manufacturing/processing, electrochemical generators, electrical components, etc., can solve the problems of inconsistent coating spacing of active materials and reduced productivity, and achieve stable positional relationship, Suppress production costs and seek the effect of simplification

Active Publication Date: 2011-10-12
CKD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in general, the coating pitch of the active material on the positive and negative electrode sheets is inconsistent.
Therefore, in the past, it was necessary to temporarily stop the winding mechanism, cut off the positive electrode sheet at a predetermined position, and then rotate the winding mechanism by a predetermined amount again to align the position of the negative electrode sheet and cut it. The stop for cutting the positive electrode sheet at the position and the stop for cutting the negative electrode sheet at the specified position are two times in total, and the winding mechanism is stopped, which may reduce productivity.

Method used

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Embodiment Construction

[0046]An embodiment will be described below with reference to the drawings. First, the structure of the lithium ion battery element obtained by the winding device of this embodiment is demonstrated.

[0047] Such as figure 1 As shown, a lithium-ion battery element (hereinafter simply referred to as "battery element") 1 is constructed in such a manner that a strip-shaped body 7 passes through two separators 3, 4 and a cylindrical winding core body 2. The positive electrode sheet 5 and the negative electrode sheet 6 are composed of two electrode sheets. In addition, in figure 1 In FIG. 2 , for convenience of description, there are locations where the separators 3 and 4 , the positive electrode sheet 5 and the negative electrode sheet 6 are spaced apart from each other.

[0048] In this embodiment, the winding core body 2 is formed of a material having sufficient rigidity (for example, a metal material such as aluminum, or a resin material such as polypropylene (PP)). In addi...

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Abstract

The invention provides a reeling device capable of improving the quality of batteries. A cathode sheet conveying mechanism for conveying electrode sheets (6) comprises a cutting mechanism (81) for cutting off the electrode sheets (6), a sheet feeding mechanism (82) for holding the electrode sheets (6) during the cutting process and delivering the electrode sheets (6) to a reeling mechanism (65) after the cutting process, and a detection sensor (91) for detecting a boundary part (D) between an active substance coated part (51) and an active material non-coated part (52) of the electrode sheets (6). When a certain distance L between the cutting mechanism (81) and the sheet feeding mechanism (82) is maintained, the cutting mechanism (81) and the sheet feeding mechanism (82) are integrally moved. Therefore, the predetermined position (M1) of the electrode sheets (6) is positioned as a holding position for the sheet feeding mechanism (82) and the predetermined position (M2) of the electrode sheets (6) is positioned as a cutting position for the cutting mechanism (81) with the boundary part (D) as a reference.

Description

technical field [0001] The present invention relates to a winding device for obtaining a battery element built into a secondary battery or the like. Background technique [0002] A battery element used as a secondary battery such as a lithium ion battery is manufactured by forming a positive electrode sheet coated with a positive electrode active material with a negative electrode sheet coated with a negative electrode active material through an insulating material. The sheets are wound while being superimposed on each other. [0003] In the winding device for manufacturing the battery element, each of the above-mentioned sheets is conveyed along the respective conveyance paths, and finally passes through the supply mechanism provided in each conveyance path, and is fed to the winding mechanism at any time. Next, when the winding of one battery element is substantially completed by the winding mechanism, the rotation of the winding mechanism is temporarily stopped, and each...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0587
CPCY02E60/10Y02P70/50
Inventor 首藤圭一
Owner CKD
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