Dry slurry material preparation technology

Abstract

The invention discloses a dry slurry material preparation technology. The dry slurry material preparation technology comprises the following steps: a, mixing dry powders, namely adding active materials, a conducting agent and an adhesive-bonding agent into a material agitator, and carrying out medium-speed agitating for 25-45 minutes, wherein the temperature of the powder materials is controlled at 15-30 DEG C during the whole dry-agitating process; b, kneading slurry materials, namely (1) adding a solvent and carrying out agitating at a low speed for 2-5 minutes, (2) carrying out agitating ata medium-low speed for 2-5 minutes, (3) carrying out agitating at a medium speed for 15-30 minutes and (4) carrying out wall-scraping agitating at high speed for 40-50 minutes, wherein the material temperature is controlled at 15-30 DEG C during the whole kneading and agitating process of the slurry material; c, carrying out high-viscosity agitating, namely scraping the wall, adding a solvent, and carrying out high-speed agitating for 40-45 minutes, wherein the temperature of the slurry material is controlled within the range of 25-35 DEG C; d, carrying out low-viscosity agitating, namely scraping the wall, adding a solvent, and carrying out medium-speed agitating for 60-70 minutes, wherein the temperature of the slurry material is controlled within the range of 30-45 DEG C; and e, adjusting viscosity, namely adding a solvent, and carrying out medium-speed agitating for 30-32 minutes, wherein the temperature of the slurry material is controlled within the range of 30-45 DEG C. Compared with existing technologies, the dry slurry material preparation technology is capable of shortening the time of the material-blending cycle by 40-50%; and thus, material-blending operations are simplified so as to improve production efficiency and equipment utilization rate.

Description

Technical field [0001] The invention relates to the technical field of slurry preparation, in particular to a dry slurry preparation process. Background technique [0002] At present, the methods commonly used for slurry preparation in the lithium-ion battery production process are divided into two types: wet batching process and dry batching process, of which wet method and dry method each account for about half. Currently, double planetary vacuum mixers are commonly used in lithium-ion battery ingredients, and some companies use double planetary vacuum mixers and ordinary single-blade mixers in conjunction; [0003] The wet batching process in the prior art is as follows: (1) Glue preparation: first add the solvent and the binder into the stirring tank, first stir at low speed for 10-20 minutes, turn on the scraping wall; then stir at high speed for 3.5 hours. (2) Add conductive agent: add conductive agent to the glue and stir at low speed for 10-20 minutes, turn on the scraping...

AI Technical Summary

Problems solved by technology

[0005] Disadvantages of the existing wet batching method: the batching cycle time is as long as 8-9 hours; the operation process is complicated and cumbersome, it needs to add materials 5-6 times, scrape the wall 5-6 times, and the production efficiency is low

[0006] Disadvantages of the existing dry batching method: the batching cycle time is longer at 7-8 hours; it needs to be equipped with special equipment for glue mixing, the equipment investment cost is high and the workshop area demand is high, the operation process is complicated, and it needs to add material 4 times, scrape the wall 4 times, and produce low efficiency

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