Method and equipment for automatically preparing ternary precursor

Abstract

The invention discloses a method and equipment for automatically preparing a ternary precursor, and the method comprises the following steps: feeding an NCM salt solution into a first reaction kettle through a first salt metering pump, feeding ammonia water into the first reaction kettle through an ammonia water metering pump, and controlling the pH value of the solution in the first reaction kettle; and feeding the solution in the first reaction kettle into a second reaction kettle through a second salt metering pump, feeding liquid caustic soda into the second reaction kettle through a liquid caustic soda metering pump, and controlling the pH value of the solution in the second reaction kettle. According to the invention, salt and ammonia are coordinated and complexed firstly, the pH value of the solution in the first reaction kettle can be detected and controlled and the flow of ammonia water can be fed back and adjusted in the process, then the solution in the first reaction kettle and liquid caustic soda are simultaneously introduced into the second reaction kettle for reaction to generate precipitates, and the pH value of the solution in the second reaction kettle can be detected and controlled and the flow of the liquid caustic soda can be fed back and adjusted in the process. The ammonia value and the pH value are controlled separately and creatively, manual sampling is not needed, the pH value and the ammonia value are detected, and the automation degree is improved.

Description

technical field [0001] The invention relates to the field of manufacturing ternary cathode materials, in particular to a method and equipment for automatically preparing a ternary precursor. Background technique [0002] The ternary cathode material is prepared by sintering the ternary precursor and the lithium source. The physical and chemical parameters of the cathode material are inherited from the ternary precursor. In the lithium battery industry, such as the capacity of the cathode material, cycle performance, rate performance, etc. Most of them are determined by the ternary precursor. Therefore, it is necessary to improve the stability and automation of the preparation of the ternary precursor. [0003] Co-precipitation is commonly used in the industry for the preparation of ternary precursors. In addition, there are gel methods to prepare ternary precursors; the conventional co-precipitation method uses a vertical jacketed reactor and paddles, and the bottom liquid i...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is: for the coprecipitation method used in the preparation of the existing ternary precursors in the prior art, it needs at least 4h / time manual sampling detection to fine-tune the pH value and ammonia value. This method has a low degree of automation and is not conducive to The problem of increasing the production capacity of ternary precursors, providing a method and equipment for automatically preparing ternary precursors

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