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Processing technology and processing equipment of lithium battery isolation film

A processing technology and separation film technology, which is applied in the field of lithium battery separation film processing technology and processing equipment, can solve problems such as unwinding or bursting ribs, uneven film surface, and uneven winding of the separation film, so as to increase the yield Roll tension, flat and smooth film surface, and prevent uneven winding end faces

Inactive Publication Date: 2017-09-15
SHANGHAI ENERGY NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a processing technology and processing equipment for a lithium battery separator, so as to solve the problems of uneven winding, unwinding or bursting of the separator, and uneven membrane surface caused by the existing winding method of the separator

Method used

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  • Processing technology and processing equipment of lithium battery isolation film

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Embodiment 1

[0028] The processing technology of the lithium battery separator of the present invention includes: using the lithium battery separator as a base film, and adding a layer of PET on the outer surface or inner surface of the lithium battery separator when the lithium battery separator is coated and wound The film is used as a backing, and the PET film backing and the lithium battery separator are wound together, and then slitted, and the film surface of the PET film used as the backing is smooth and free of foreign matter. The lithium battery separator is a PP or PE film that plays the role of separating the positive and negative electrodes in the lithium battery. Besides PET, the material of the film backing can be selected from other similar or suitable materials in other embodiments.

[0029] See figure 1 , a schematic diagram of the processing technology and processing equipment of the present embodiment, figure 1 In the middle, the PET film backing and unwinding device i...

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Abstract

The invention discloses a processing technology and processing equipment of a lithium battery isolation film. The processing technology comprises the following step: when coating and winding a lithium battery isolation film, winding at least one layer of film backing and the lithium battery isolation film together, wherein the film backing is located on an outer surface or an inner surface of the lithium battery isolation film; a film surface of the film backing is flat and smooth, and free of foreign matters. The processing equipment of the lithium battery isolation film, provided by the invention, comprises at least one film backing unwinding device arranged at a lithium battery isolation film coating and winding position; a film backing is wound along with the lithium battery isolation film; and the film backing is located on the outer surface or the inner surface of the lithium battery isolation film during winding. The processing technology and the processing equipment provided by the invention solve problems of irregular winding, winding missing or rib exposure, and uneven film surface of the existing lithium battery isolation film.

Description

technical field [0001] The invention belongs to the technical field of processing and manufacturing of a lithium battery isolation film, and particularly relates to a processing technology and processing equipment of a lithium battery isolation film. Background technique [0002] Due to the advantages of lithium battery with high energy density, long cycle life, low self-discharge rate, no memory effect and green environmental protection, coupled with the continuous progress of lithium battery technology, lithium battery products have been widely used in all walks of life, such as mobile phones , portable computers, camcorders, cameras, electric vehicles, etc. [0003] As one of the four key materials of lithium batteries, the lithium battery separator is a material that connects and separates the positive and negative electrodes of the battery. It is an electronic insulator, which can prevent short circuits, but allows lithium ions to pass through. It can also pass through ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/14H01M50/406
CPCH01M50/406Y02E60/10
Inventor 程跃王治学陈永乐王连杰
Owner SHANGHAI ENERGY NEW MATERIALS TECH CO LTD
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