A lithium-ion battery separator preparation device

Abstract

The invention relates to a lithium ion battery diaphragm manufacturing device, in particular to a small diaphragm manufacturing device. The manufacturing device comprises a first roller, a drying device, a first stretching roller, a second stretching roller, a clamping roller, a second roller and a spraying device. The manufacturing device further comprises a flattening device; the flattening device comprises frames, vertical plates, scraping plates and base film brushes; and the spraying device comprises a nozzle, material channels, an inner cone, a protruding portion and a flat portion. Themanufacturing device is simple and suitable for preparing battery diaphragms with stable and uniform quality through laboratory and factory tests; sprayed materials have good embedding performance; and the channels between the materials are complete. The device is particularly suitable for spraying various component materials to form a diaphragm. A diaphragm prepared through the device is high instability, uniform in quality and good in reproducibility.

Description

technical field [0001] The present application relates to a diaphragm preparation device, in particular to a diaphragm preparation device for lithium batteries, in particular to a small lithium battery diaphragm preparation device, especially a diaphragm preparation device for small-scale production testing. Background technique [0002] Lithium battery is an important part of the new energy industry, and it is the focus and difficulty of current research and development. The battery separator of lithium battery is an important component of the battery, which affects the capacity, cycle performance and safety performance of lithium-ion batteries. The lithium-ion battery separator is located between the positive and negative electrodes of the lithium-ion battery. Therefore, the lithium-ion battery separator must have a rich microporous structure, which can allow lithium ions to pass through freely while preventing electrons from passing through, thereby completing the charging...

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Problems solved by technology

[0011] Another example is the prior art CN102442566A which discloses a lithium battery diaphragm composite machine, which includes numerous roll devices and roller devices, and its structure is complex, and it occupies a relatively large area, making it difficult to test and use in laboratories or factories.

[0012] Regarding the preparation devices of organic and inorganic coating diaphragms in the prior art, the laboratory usually prepares the diaphragm by means of coating, spraying, scraping, etc. However, the laboratory methods are relatively primitive, and there is no way to fix the sprayed materials well, and For the preparation of organic and inorganic coating separators, it is generally necessary to add more organic modifiers. More organic modification additives cause difficulty in spraying and uniform film formation, which will lead to safety hazards and quality problems for battery separators. ;

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