A method for estimating solid content on-line display of ternary precursor precipitation reactor

Abstract

A method for estimating the solid content of a ternary precursor reactor online display, comprising the following steps: 1) obtaining the lowest temperature and the highest temperature through a temperature sensor; 2) dividing the range from the lowest temperature to the highest temperature into multiple temperature ranges; 3) In each temperature range, the torque value is measured by the built-in torque tester in the reactor, and the solid content under the corresponding torque value is measured; 4) The relationship curve between the torque value and the solid content in each temperature range is obtained by fitting; 5 ) Obtain the functional relationship between the torque obtained by sampling and the solid content; 6) Optimize the functional relationship in step 5); 7) Call the functional relationship of different temperature ranges according to the temperature during production, and obtain the solid content in the reactor according to the torque value value to monitor the progress of the reaction in the reactor. The invention can accurately, rapidly and continuously determine the value of the solid content in the ternary precursor precipitation reaction kettle, and grasp the reaction process in the reaction kettle in time; thereby improving the product quality of the ternary precursor.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery ternary material precursor production equipment, in particular to a method for estimating the solid content of the ternary precursor precipitation reactor on-line display. Background technique [0002] The preparation of precursors is one of the most critical processes in the production process of ternary materials for lithium-ion batteries. At present, the main industrial preparation method is to combine a certain concentration of nickel, cobalt, and manganese metal salt solution with a certain concentration of alkaline solution and complexation. The agent is continuously added to the reaction kettle according to a certain flow rate, and the hydroxide precipitate is produced under the appropriate reaction temperature, stirring speed and pH. The production and preparation of the precursor is an acid-base neutralization reaction, which needs to be carried out in an environment protected...

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Problems solved by technology

However, the temperature also changes during the production process of the ternary precursor, and the value of the solid content has a great relationship with the temperature, and this invention patent does not take into account the influence of temperature on viscosity, which is aimed at the reaction process A sizing agent with no change in temperature or little change in temperature, so its application range is small, and it is not suitable for obtaining solid content in the preparation process of ternary precursors

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