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Winding drum device, winding element and manufacturing method of the winding element

A technology for winding components and reels, which is applied in the directions of electrical components, secondary battery manufacturing, and final product manufacturing, etc., to achieve the effects of suppressing the complexity of the mechanism, suppressing the increase in cost, and suppressing the increase in cost.

Inactive Publication Date: 2009-09-23
CKD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the technique described above, first, the separator must be fixed on the surface of the mandrel, and the separator and the electrode foil must be wound on it.

Method used

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  • Winding drum device, winding element and manufacturing method of the winding element
  • Winding drum device, winding element and manufacturing method of the winding element
  • Winding drum device, winding element and manufacturing method of the winding element

Examples

Experimental program
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Effect test

Embodiment Construction

[0082] One embodiment will be described below with reference to the drawings.

[0083] First, the structure of the lithium ion battery element of the wound element obtained by the winding device of this embodiment is demonstrated. picture figure 1 As shown, a lithium ion battery element (hereinafter referred to as "battery element") 1 is constituted by winding a strip-shaped body 7 with respect to a cylindrical winding mandrel 2, and the strip-shaped body 7 is It consists of two separator sheets 3, 4, positive electrode foil 5, and negative electrode foil 6. In addition, in figure 1 In FIG. 2 , for convenience of description, the separators 3 , 4 , the positive electrode foil 5 , and the negative electrode foil 6 are shown so as to be spaced apart from each other.

[0084] In the present embodiment, the winding mandrel 2 is formed of a sufficiently rigid material (for example, aluminum or the like). In addition, the winding mandrel 2 has an insertion hole 8 (refer to ima...

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Abstract

The invention provides a winding drum device, a winding element and a manufacturing method of the winding element, which make material of winding spindle have degree of freedom, will not complicate mechanism and increase cost, and can improve winding precision. A splicing tape (51) made from polypropylene is adhered with respect to at least a part of the surface of the winding spindle (2). In addition, separating sheets (3, 4) made from polypropylene are jointed by hot melt through a hot-melt mechanism (43) with respect to the splicing tape (51) when the two separating sheets are overlapped. After jointing, the separating sheets (3, 4) are cut off and electrode foil is rolled. Because two separating sheets (3, 4) can be synchronously jointed fixedly, end edges do not need to be staggered to joint; furthermore, because of indirect jointing, material of the winding spindle (2) has no any limitation.

Description

technical field [0001] The present invention relates to a reel device for obtaining a wound element such as built in a storage battery or the like, a wound element and a method of manufacturing the same. Background technique [0002] A battery element used as a storage battery such as a lithium ion battery is configured by winding a strip-shaped body composed of a positive electrode foil, a negative electrode foil, and two separator sheets. [0003] In the past, as a reel device for winding a strip-shaped body, people have known a method in which the above-mentioned electrode foil and separator are wound up with respect to a rotatable winding core (rotation shaft), and The strip-shaped body (rolled body) wound up after the winding is removed. However, it is difficult to remove the wound body from the rotating shaft due to the winding pressure of the wound body, and there is a risk of damage to the separator and electrode foil during removal. In addition, there is a risk th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/38H01M10/36H01M10/40H01M10/04
CPCY02E60/12Y02E60/10Y02P70/50H01M10/0431H01M10/0525
Inventor 高濑辰己多贺僚治
Owner CKD
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