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Separator winding core, separator wound body, and manufacturing method of separator wound body

A manufacturing method and technology of winding body, applied in the direction of separator/film/diaphragm/spacer element, hybrid capacitor separator, structural parts, etc., can solve the problem of core and diaphragm winding body storage method friction force is not clearly documented, etc. problem, to achieve the effect of not easy to collapse

Active Publication Date: 2022-06-07
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In Patent Document 1, there is no clear description about the storage method of the core and the separator wound body, and the friction force of the side surface, and the same problem may exist.

Method used

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  • Separator winding core, separator wound body, and manufacturing method of separator wound body
  • Separator winding core, separator wound body, and manufacturing method of separator wound body
  • Separator winding core, separator wound body, and manufacturing method of separator wound body

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Embodiment Construction

[0034] Below, according to Figures 1 to 7 Embodiments of the present invention will be described in detail. Hereinafter, a heat-resistant separator for batteries such as a lithium ion secondary battery will be described as an example of the battery separator wound around the separator winding core (core) according to the present invention.

[0035]

[0036] First, according to Figure 1 to Figure 3 A lithium ion secondary battery will be described.

[0037] Non-aqueous electrolyte secondary batteries represented by lithium ion secondary batteries have high energy density, so they are currently used as batteries for devices such as personal computers, mobile phones, and portable information terminals, and mobile objects such as automobiles and airplanes. It is widely used as a stationary battery which contributes to the stable supply of electric power.

[0038] figure 1 It is a schematic diagram showing the cross-sectional structure of the lithium ion secondary battery 1...

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Abstract

The present invention relates to a separator winding core, a separator wound body, and a method for manufacturing a separator wound body. Realize a separator core that has a large frictional force between sides and is less likely to collapse when stacked. Provided is a separator roll core characterized in that at least two can be stacked with the side on which the separator is not wound up and down, and at least one of the side surfaces has an arithmetic average roughness of 0.16 μm or more.

Description

technical field [0001] The present invention relates to a separator winding core used when winding a separator for a non-aqueous electrolyte secondary battery, a separator winding body obtained by winding a separator around the separator winding core, and a method for producing the separator winding body. Background technique [0002] In Patent Document 1, regarding a separator for a non-aqueous electrolyte secondary battery which is continuously manufactured while being conveyed by a conveying system such as a roller, a separator winding core which is wound when the manufactured separator is supplied as a product is listed. (hereinafter, also referred to as "core") as an example of the shape. [0003] The core disclosed in Patent Document 1 has an outer cylindrical member around which a diaphragm is wound, an inner cylindrical member functioning as a bearing for the insertion shaft, and a support member (hereinafter, referred to as the following: Also referred to as "rib")...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/403H01M50/417B65D61/00H01M50/406
CPCH01G9/02H01G11/52H01M50/446H01M50/403H01M50/417H01M50/406Y02E60/13H01M50/44H01G11/24H01G11/28H01M6/10
Inventor 长谷川博彦
Owner SUMITOMO CHEM CO LTD