Preparation apparatus and method for lithium ion battery slurry

Abstract

The invention belongs to the technical field of lithium ion batteries and especially relates to a preparation apparatus for lithium ion battery slurry. The apparatus comprises a solvent loading tank and a slurry agitator tank, wherein the slurry agitator tank is connected with a first vacuum pump; the apparatus further comprises a binder premixing tank, wherein the binder premixing tank is connected with a second vacuum pump; a discharge outlet of the solvent loading tank is connected with a feed inlet of the binder premixing tank through a first pipeline, and a discharge outlet of the binder premixing tank is connected with a feed inlet of the slurry agitator tank through a second pipeline. Compared with the prior art, the preparation apparatus provided by the invention has the following advantages: fluids like a solvent and a binder premixed liquid are added from the bottom of a tank to the top of the tank by using vacuum negative pressure, so it is guaranteed that there is only a two-phase interface of a liquid phase and a solid phase, maximum-efficiency mutual infiltration is realized, generation of bubbles in the slurry is reduced, dispersion is promoted, stirring time is shortened and operation is simple, which enables stirring time to be reduced and production efficiency to be improved. Furthermore, the invention also discloses a method of utilizing the apparatus for preparation lithium ion battery slurry.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, in particular to a device and method for preparing slurry for lithium ion batteries. Background technique [0002] With the development of modern society and the enhancement of people's awareness of environmental protection, more and more devices choose to use rechargeable secondary batteries as power sources, such as mobile phones, notebook computers, power tools and electric vehicles, etc. The application and development of batteries provide a broad space. Lithium-ion batteries have become the most widely used rechargeable secondary batteries due to their high energy density, high open circuit voltage, long cycle life and environmental protection. [0003] The preparation of lithium-ion batteries generally includes steps such as preparation of positive and negative electrode slurry, coating, cold pressing, winding or lamination, formation and capacity, among which the preparatio...

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Problems solved by technology

[0006] One of the purposes of the present invention is to provide a device for preparing lithium-ion battery slurry for the deficiencies of the prior art. When using the device to prepare lithium-ion battery slurry, it is added from bottom to top in a vacuum environment. The solid and fluid substances are then mixed, which can effectively avoid the generation of defects such as air bubbles and pitting, so that the slurry can be fully mixed, improve the quality of the product, and can save energy consumption, improve production efficiency, and make the feeding process simple and convenient. It is easy to realize clean production to overcome defects such as air bubbles and pockmarks when using the stirring device in the prior art, resulting in loss and waste of materials, and it is difficult to remove tiny air bubbles even if vacuum treatment is adopted in the later stage Clean, lack of quality affecting the product

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