A lithium-ion battery positive electrode waste slurry recovery system and recovery method

Abstract

The invention discloses a lithium-ion battery positive electrode waste slurry recovery system, which includes a mixer, a filter funnel, a rotary arm dryer, a ball mill, a fluidized bed, a packing absorption tower, a screening machine, a mixer, a filter funnel, and a rotary arm dryer. Dryer, ball mill, and fluidized bed are connected end to end in turn, the exhaust port of the fluidized bed is connected to the packed absorption tower, and the screening machine is located below the outlet of the fluidized bed. The moisture and solvent dried by the rotary arm dryer of the present invention are introduced into the fluidized bed through the exhaust pipe, and finally enter the packing absorption tower together with the harmful gas in the fluidized bed, thereby avoiding environmental pollution. The recovery system of the present invention realizes the continuous and efficient recovery of positive electrode waste slurry in the production of lithium-ion batteries, which not only ensures the purity of recovered materials, but also has high efficiency and low pollution, and has good performance even after long-term use, thus greatly The production cost is reduced, and the competitiveness of battery manufacturing enterprises is improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a recycling system and method for the positive electrode waste slurry of lithium ion batteries. Background technique [0002] Lithium-ion batteries are widely used in mobile communications, notebook computers, electric bicycles, electric vehicles and other fields due to their advantages such as high energy density, light weight, long service life, low self-discharge rate and no memory effect. The main parts of lithium-ion batteries are the positive and negative electrodes. The positive electrode is usually made by uniformly mixing the positive electrode active material, conductive agent, and binder into a slurry, and then coating it on the aluminum foil of the current collector. The positive electrode active material is generally lithium. Compounds, such as lithium cobaltate, lithium manganate, lithium iron phosphate, etc., and the positive active material accounts ...

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Problems solved by technology

However, the waste slurry is exposed to the air for a long time, and it is easy to be mixed with impurities and foreign matter, and it will cause agglomeration after absorbing water. If it is directly used for coating, the rough and hard waste slurry particles will puncture the pole piece or Pierce the diaphragm when winding the battery core, causing a short circuit inside the battery, which greatly affects the quality of the battery

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