Dot coating slurry return material reprocessing system and its working method

Abstract

The invention belongs to the technical field of lithium battery diaphragm preparation, and in particular relates to a dot-like coating slurry reprocessing system and a working method thereof. Wherein the dot coating slurry return reprocessing system includes: sequentially connected return mechanism, filter mechanism, and slurry conveying mechanism; wherein the return mechanism includes: an upper scraper combination located at the upper part of the coating machine 1. The lower scraper combination located at the lower part of the silo of the coating machine; the excess slurry on the coating roller is scraped off by each scraper combination, the particle size is sieved by the filter mechanism, and the prepared slurry with the corresponding particle size is added. The conveying mechanism conveys to the silo of the coating machine for coating, which solves the problem of uneven distribution of the overall particle size after mixing the recycled slurry and the proportioned slurry, and improves the recycling rate of the slurry.

Description

technical field [0001] The invention relates to the technical field of preparation of lithium battery separators, in particular to a dot-like coating slurry reprocessing system and a working method thereof. Background technique [0002] During the coating process of the dot roll coater, the slurry tends to gather at the upper scraper, resulting in agglomeration, wasting the slurry, and increasing the production cost. There are also some return material reprocessing devices in the prior art. Generally, the return material particle size is screened and reused after the slurry is uniformly recovered. This will not only lead to problems such as difficult particle size screening and low reuse, but also easy Mixing the recycled slurry with the unused slurry (proportioned slurry) will result in uneven particle size distribution, resulting in poor dot roller coating effect and uneven slurry coating, which reduces the recycling rate. Contents of the invention [0003] The object o...

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Problems solved by technology

[0002] During the coating process of the dot roll coater, the slurry tends to gather at the upper scraper, resulting in agglomeration, wasting the slurry, and increasing the production cost

There are also some return material reprocessing devices in the prior art. Generally, the return material particle size is screened and reused after the slurry is uniformly recovered. This will not only lead to problems such as difficult particle size screening and low reuse, but also easy Mixing the recovered slurry with the unused slurry (proportioned slurry) will result in uneven particle size distribution, resulting in poor dot roll coating effect and uneven slurry coating, which reduces the recycling rate

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