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Horizontal drawing extraction process of lithium battery separator

A lithium battery diaphragm and extraction technology, which is applied to lithium batteries, battery pack components, non-aqueous electrolyte batteries, etc., can solve the problems of time-consuming operation and difficulty, and achieve high slitting utilization rate, good flatness, and fast flattening Effect

Active Publication Date: 2021-03-19
SUZHOU GREEN POWER NEW ENERGY MATERIALS CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It takes at least 10 minutes to perform a flanging process, which is very time-consuming and difficult to operate

Method used

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  • Horizontal drawing extraction process of lithium battery separator
  • Horizontal drawing extraction process of lithium battery separator
  • Horizontal drawing extraction process of lithium battery separator

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Embodiment Construction

[0018] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art.

[0019] Refer to attached figure 1 As shown, this embodiment provides a horizontal stretching extraction process for lithium battery separators, which includes sequentially performing a transverse stretching (1TDO) step, an extraction step, and a secondary transverse stretching (2TDO) step. In the first step and the second transverse rope pulling step, the diaphragm is stretched through a plurality of stretching rollers. The diaphragm is firstly stretched multiple times in one transverse stretching step, then pulled into the extraction tank for extraction in the extraction step, and then enters the second transverse stretching step after extraction.

[0020] It should be noted that in the extraction step, before the diap...

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Abstract

The invention provides a horizontal drawing extraction process of a lithium battery diaphragm, which belongs to the field of wet preparation of lithium battery diaphragms. A horizontal stretching extraction process for a lithium battery diaphragm, comprising a transverse stretching step and an extraction step performed in sequence, and before the diaphragm is extracted and penetrated through the film, the thick edges on both sides of the diaphragm are cut off. After edge trimming, extraction is carried out to penetrate the membrane. There is no thick edge curling, fast flattening, no need for flanging, high membrane penetration efficiency, and avoiding the operator’s long-term contact with methylene chloride during membrane penetration; the membrane enters the secondary transverse drawing There is no thick side for stretching, the difference between the effective width and the actual width of the equipment is very small, and the effective width increases. There is no thick edge, the flatness of both sides of the film is good, and the utilization rate of large slitting is high.

Description

technical field [0001] The invention belongs to the field of manufacturing lithium battery diaphragms, and in particular relates to a horizontal drawing extraction process of lithium battery diaphragms. Background technique [0002] Transverse stretching and extraction are necessary processes in the production of lithium battery separators. In the current lithium battery diaphragm production process, after the diaphragm is stretched by 1TDO (one-time transverse stretching), the two sides of the film are thicker, and there is a certain gap between the actual effective width and the width that the equipment can achieve, and the flatness of the two sides of the film is not good. , The utilization rate of large slitting is low. At the same time, after the membrane enters the extraction process, the thick side is easy to turn over. In actual production, when the diaphragm passes through the extraction tank, it needs to be turned up after the diaphragm is roughly flattened. The p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/403H01M10/052
CPCH01M10/052H01M50/403Y02E60/10
Inventor 叶茂彭立群
Owner SUZHOU GREEN POWER NEW ENERGY MATERIALS CO LTD
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