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Method and equipment for coating and scraping edges of battery separator

A battery diaphragm and edge scraping technology, which is applied to the surface coating liquid device, coating, etc., can solve the problems of convex edges of the coated diaphragm, waste of resources, etc., to reduce slurry loss and strong applicability , the effect of reducing production costs

Active Publication Date: 2017-07-28
中创新航科技(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for coating and scraping the edges of battery separators, which can solve the problem that the edges of the existing coated separators are prone to protruding edges and cause waste of resources.

Method used

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  • Method and equipment for coating and scraping edges of battery separator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The battery diaphragm coating scraping equipment of the present embodiment, such as figure 1 As shown, it includes a scraper 1, a collection pipe 3 and a rotating mechanism 4. The front end of the collection pipe 3 is fixedly connected with the scraper 1, and one end of the scraper 1 is inserted into the inside of the collection pipe 1 from the nozzle, and the end of the collection pipe 1 is used for connecting with the scraper 1. The coating material box 2 is connected; the rotating mechanism 4 is connected with the front end of the collection pipe 3, and is used to realize the opening and closing of the scraper 1 and the diaphragm 5 and the adjustment of the position and angle of the scraper 1.

[0026] The battery diaphragm coating scraping equipment of the present embodiment, such as figure 1 As shown, when in use, fix the rotating mechanism 4 at a suitable position of the coating machine, adjust the position and angle of the scraper 1 through the rotating mechanism...

Embodiment 2

[0028] The method for coating and scraping the battery separator of the present embodiment uses the equipment for coating and scraping the battery separator as in Example 1, which specifically includes the following steps:

[0029] 1) Adjust the position and angle of the scraper through the rotating mechanism. The scraper is made of metal, the thickness is 0.2mm, the angle of the scraper edge is 5°, and the width of the scraping treatment is 1mm;

[0030] 2) Turn on the coater, and the diaphragm after coating the slurry moves at a rate of 3m / min (the base material of the diaphragm is PP, and the coating slurry is ceramic slurry), and the slurry is coated without drying with a scraper. The diaphragm is scraped (the slurry coated on the diaphragm is in a liquid and flowable state), and the movement direction of the scraper and the diaphragm to be scraped is at an angle of 80°. Under the relative action between the diaphragm and the scraper, The scraped liquid slurry flows into t...

Embodiment 3

[0032] The method for coating and scraping the battery separator of the present embodiment uses the equipment for coating and scraping the battery separator as in Example 1, which specifically includes the following steps:

[0033] 1) Adjust the position and angle of the scraper through the rotating mechanism. The scraper is made of metal, the thickness is 1.0mm, the angle of the scraper edge is 60°, and the width of the scraping treatment is 100mm;

[0034] 2) Turn on the coater, and the diaphragm after coating the slurry moves at a rate of 200m / min (the base material of the diaphragm is PE, and the coating slurry is ceramic slurry), and the scraper is used to dry the coating slurry without drying. The diaphragm is scraped (the slurry coated on the diaphragm is in a liquid and flowable state), and the movement direction of the scraper and the diaphragm to be scraped is at an angle of 5°. Under the relative action between the diaphragm and the scraper, The scraped liquid slurr...

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Abstract

The invention discloses a method and a device for edge scraping in battery separator coating. An edge scraping process is carried out to a separator being coated by a slurry material through a scraper. Scraped slurry material flows into a collecting pipeline through a cutting edge of the scraper and is recycled into a coating material box through the collecting pipeline. The method for the edge scraping in the battery separator coating not only solves a problem of projection and edge cracking in an edge of the separator due to accumulation of the slurry material during a separator coating process, but also reduces the loss of the slurry material in waste edge cutting. The slurry material saved during edge scraping is directly recycled so that a coating cost is reduced and a production efficiency is increased. The method is especially suitable for recycling the raw slurry material of an inorganic ceramic coating. The method is simple in operation, is convenient, can reduce production cost and is suitable for being popularized and applied.

Description

technical field [0001] The invention belongs to the technical field of battery diaphragm production equipment, in particular to a method for coating and scraping a battery diaphragm, and also relates to a device for coating and scraping a battery diaphragm. Background technique [0002] Lithium-ion power batteries have the advantages of high energy density, high working voltage, no memory effect, long cycle life, and no pollution to the environment. They have been widely used in many fields such as electric vehicles, energy storage power stations, and notebook computers. Lithium-ion batteries are mainly composed of positive electrodes, negative electrodes, separators, electrolytes, and battery casings. Among them, the diaphragm is a specially shaped polymer film with a microporous structure that allows lithium ions to pass through freely, but electrons cannot pass through. The main function of the diaphragm is to separate the positive and negative electrodes of the battery,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05C11/04B05C11/10
CPCB05C11/041B05C11/1039
Inventor 张国军王海文张海峰白莉贾海刘娇
Owner 中创新航科技(江苏)有限公司
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