Lithium ion battery slurry preparation apparatus and method thereof

Abstract

The invention relates to a lithium ion battery slurry preparation apparatus. The lithium ion battery slurry preparation apparatus comprises a powder storage tank, a dry powder mixing and dispersing device, a solvent storage tank, a primary dispersion device, a buffer tank A, a secondary dispersion device, a buffer tank B, a third dispersion device, and a vacuum defoaming storage tank; the primary dispersion device, the buffer tank A, the secondary dispersion device, the buffer tank B, the third dispersion device and the vacuum defoaming storage tank are connected through the pipelines in order; the temperature-detecting devices are arranged on the secondary dispersion device and the third dispersion device; a beta-ray density detector and an on-line viscosity detector are arranged between the outlet of the secondary dispersion equipment and the buffer tank, and the beta-ray density detector and the on-line viscosity detector are arranged between the thrid dispersion equipment and the vacuum defoaming storage tank. The invention also relates to a method for preparing a lithium battery slurry by using the apparatus, the used apparatus has advantage of high production efficiency, the dispersion of the slurry is uniform, the slurry viscosity consistency can be better controlled, and the same batch of the slurry is basically controlled at +/-700 mPa.S.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a preparation device and method of lithium-ion battery slurry. Background technique [0002] Lithium battery is a green high-energy rechargeable battery. With the continuous advancement of technology, its performance has been continuously improved, and it has broad application prospects in portable electronic devices, electric vehicles, energy storage, and defense industries. The pulping process is an important process in the production process of lithium batteries. The so-called pulping is to use special solvents and adhesives to mix with powdery positive and negative active materials respectively, and after high-speed stirring to make slurry-like positive and negative active materials. Negative substance. The uniform slurry ensures the uniform distribution of the positive and negative electrodes on the substrate, thereby improving the consistency and safety of th...

AI Technical Summary

Problems solved by technology

[0003] The currently used pulping machine adopts intermittent mixing pulping, which has cumbersome process, low efficiency and poor consistency, which affects the overall battery product quality

The existing process cannot make pulp continuously, and the dispersion effect is limited by the dispersion time, resulting in low production efficiency, which makes the dispersion effect and production efficiency mutually restrictive, that is, to obtain a well-dispersed slurry must sacrifice production efficiency, and to improve production efficiency requires The dispersion effect must be sacrificed as a price, and at the same time, the consistency of the slurry between batches cannot be guaranteed, resulting in the inability to guarantee the consistency of the battery, which affects the subsequent assembly of power lithium batteries.

Images