Winding device

A winding device and winding core technology, applied in the direction of sustainable manufacturing/processing, electrochemical generators, electrical components, etc., can solve problems such as uneven thickness of electrode sheets, defective winding components, etc., and achieve high productivity , the effect of suppressing enlargement and preventing deformation

Active Publication Date: 2018-12-11
CKD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the thickness of the electrode sheet supplied to the winding core is slightly different along the longitudinal direction of the electrode sheet, and there is a risk of malfunction in the obtained wound element due to the unevenness of the thickness of the electrode sheet.

Method used

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Experimental program
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Embodiment Construction

[0092] One embodiment will be described below with reference to the drawings. First, the structure of a lithium ion battery element as a wound element obtained by a winding device will be described.

[0093] picture figure 1 As shown, a lithium ion battery element 1 (hereinafter simply referred to as "battery element 1") is manufactured by interposing two separator sheets 2, 3, a positive electrode sheet 4 and a negative electrode sheet 5. I wind it up in a superimposed state. In addition, instead of the two separator sheets 2 and 3, one folded separator sheet may be used. In addition, below, the separator sheets 2 and 3 and the electrode sheets 4 and 5 are referred to as "various sheets 2 to 5" for convenience of description.

[0094] The separators 2 and 3 are strip-shaped with the same width and are made of an insulator such as polypropylene (PP) to prevent short-circuiting caused by contact between different electrodes 4 and 5 .

[0095]The electrode sheets 4 and 5 are...

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PUM

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Abstract

An object of the present invention is to provide a winding device in which it is possible to more reliably prevent a change in the circumference of a winding core due to carelessness and caused by thewinding force, and it is possible to reduce the size of the winding core. The winding device includes: a fixed chip (81); a movable chip (82); a thickness measuring mechanism for measuring the thickness of an electrode sheet; a circumference changing mechanism (84) for changing the circumference of the winding core; and a control mechanism for controlling the operation of the circumference changing mechanism (84). The circumference changing mechanism (84) includes: a rotatable cam shaft (841) having a cam portion (841a) having a inconstant distance between a rotating shaft and an outer peripheral surface; a spring (842) in a state of pressing the movable chip (82) in a direction in which the distance between the two chips (81, 82) changes relative to the outer peripheral surface of the cam portion (841a); an actuator (843) that supplies power to rotate the cam shaft (841). The control mechanism controls the operation of the actuator (843) based on the measurement result of the thickness measuring mechanism.

Description

technical field [0001] The present invention relates to, for example, a winding device for obtaining a wound element built into a secondary battery or the like. Background technique [0002] For example, a secondary battery for obtaining a wound element such as a lithium ion battery is manufactured in such a manner that a positive electrode sheet coated with a positive electrode active material is separated from a negative electrode sheet coated with a negative electrode active material. The separator sheets made of insulating materials are interposed and wound up in a superimposed state. [0003] In the winding device for manufacturing wound elements, the electrode sheets and the separator sheets, which are supplied from a raw roll wound in a roll shape, are conveyed to a rotatable winding core along respective conveying lines. In addition, the electrode sheet and the separator sheet are wound in a superimposed state by the winding core, and finally the winding of the end ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0587
CPCH01M10/0587Y02E60/10Y02P70/50
Inventor 多贺僚治
Owner CKD
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