Preparation method of lithium-ion battery slurry

Abstract

The invention provides a preparation method of lithium-ion battery slurry and relates to manufacturing of the lithium-ion battery. The preparation method of the lithium-ion battery slurry is characterized by comprising the steps of dry-blending, gluing, high-viscosity stirring and solvent diluting. According to the preparation method of the lithium-ion battery slurry, the dry blending method is used so that active materials are more uniformly mixed with a conductive agent, and the time of slurry combination is saved; during the high-viscosity stirring, a high-speed shearing superfine dispersion machine performs high-speed shearing superfine dispersion on slurry added with a nanometer-micrometer composite conductive agent, and performs instant micromixing dispersion on each ingredient of the nanometer-micrometer composite conductive agent, so that the dead corners of the slurry in a conventional mixing machine are avoided, and the effect of superfine dispersion uniformity is realized; the slurry combination is finished with higher viscosity, and water is added to the slurry for diluting to a required viscosity before the slurry is coated, so that the dispersion uniformity of the slurry during slurry combination is ensured, and the time of slurry combination can be shortened. The preparation method of the lithium-ion battery slurry has the advantages that the time of slurry combination is shortened and the superfine dispersion uniformity is ensured.

Description

Technical field [0001] The invention relates to the manufacture of lithium ion batteries, and more specifically to a method for preparing lithium ion battery slurry. Background technique [0002] As a new type of green energy, lithium-ion batteries have a wide range of applications due to their high capacity, high voltage, small size and light weight, long cycle life, wide working range, good safety, and no memory effect. For example, the emerging 3C / 3G mobile phones , Laptops, tablets, cameras and other portable electronic products, as well as electric vehicles, power systems for national defense and military equipment, photovoltaic energy storage systems, energy peak-shifting power stations, uninterrupted power supplies, small and medium-sized energy storage systems and other fields. [0003] In the process of manufacturing lithium-ion batteries, slurry production is an important part. The existing technical methods can only control the consistency of battery pole pieces from a m...

AI Technical Summary

Problems solved by technology

[0003] In the manufacturing process of lithium-ion batteries, slurry production is an important link. The existing technical methods can only control the consistency of the battery pole pieces from the macroscopic aspect, but cannot take effective measures to control the microscopic aspect, such as electrode materials. Dispersion with conductive agent and binder, as well as the microcosmic consistency of the battery pole piece; and the microcosmic consistency of the electrode is precisely the most important factor affecting the consistency of the battery. Therefore, the preparation of the slurry also appears to be especially important

[0004] At present, the uniformity of the slurry is not paid attention to in the slurry mixing process of lithium-ion battery slurry, which has the following disadvantages: 1. The slurry is stored statically, resulting in slurry separation and surface solidification; 2. The slurry is not evenly mixed with the feeding material, which is likely to cause severe 3. Insufficient activation time may easily cause inhomogeneous particles in the slurry; 4. When coating, the slurry will stay in the liquid injection container, resulting in waste and increased production costs