Reaction process concentration control method of precursor for lithium battery material

Abstract

The invention relates to a reaction process concentration control method of a precursor for a lithium battery material. The method comprises the steps that: a level controller in a reaction kettle feeds back the change of the charging total quantity at different reaction steps in real time; a PLC (programmable logic controller) control system controls a circulating pump to pump material in the reaction kettle into a concentration tank; the PLC control system adjusts the discharge of concentrated filtrate in the concentration tank in time; concentrated material returns the reaction kettle; the concentrated material continuously remains in the reaction kettle to be fully reacted; the concentration of solid precipitate in the reaction kettle is controlled to reach 5 to 60 percent; the specific gravity of the solid precipitate to a mother liquor mixture is controlled to be 1.1-1.8g / cm3. The method has the advantages that the circulation concentration and automatic discharge of the material in the reaction kettle are controlled through the PLC control system, the automation control level is high, the reaction accuracy is high, the reaction time of the material in the reaction kettle can be effectively prolonged, sufficient reaction is guaranteed, and the capacity and the product quality are improved.

Description

technical field [0001] The present invention relates to lithium battery technology, specifically a concentration control method for the precursor reaction process of lithium battery materials, which is applied to the field of lithium battery positive electrode materials, mainly for the production of positive electrode material precursors, such as cobalt hydroxide, cobalt carbonate and nickel cobalt manganese Multi-element composite hydroxide. Background technique [0002] Lithium battery cathode material market With the popularization of electronic consumer products such as mobile phones, notebook computers, digital cameras, and digital video cameras, and the expansion of energy and power products such as power vehicles, electric tools, electric bicycles, and energy storage devices for power generation, the demand for its material precursors The quantity is constantly increasing, and the requirements for quality are becoming increasingly stringent, and the production of ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, such as low reaction efficiency, low production capacity, and inconsistent product quality in the lithium battery material precursor reactor process, the present invention provides a concentration control method for the lithium battery material precursor reaction process, which can improve the efficiency of the reactor , to achieve stable control of reactor materials, while ensuring production capacity and product quality

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