Optimized dispersion method for lithium battery positive electrode slurry, and slurrying device thereof

Abstract

The invention relates to the technical field of lithium batteries, and specifically relates to an optimized dispersion method for lithium battery positive electrode slurry, and a slurrying device thereof. The optimized dispersion method for the lithium battery positive electrode slurry comprises the steps of (1) determining conductivities of slurries in different proportions when the slurries are fully and uniformly dispersed by lab-scale tests; (2) storing data obtained by the step (1) in microprocessors of conductivity testers and presetting the data as reference values; (3) monitoring the conductivities of the slurries in different positions at different temperatures in real time through the conductivity testers, and comparing the obtained data with the preset reference values in the controller so as to evaluate uniformity of the slurry, and determining a slurrying end time when the conductivity monitored in real time is fit to the preset reference value. The slurrying device comprises a main body. The main body is provided with a controller for controlling open and close of the slurrying device, three conductivity testers connected with the controller, and a stirrer. The dispersion situations of the slurry are mastered in real time and the slurrying end time can be controlled accurately, by using the method and the device.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a method for optimizing the dispersion of positive electrode slurry of lithium batteries and a slurry making device thereof. Background technique [0002] Lithium battery is a new type of high-energy battery successfully developed in the 20th century. Lithium batteries have the advantages of high voltage, high energy density, good cycle performance, small self-discharge, no memory effect, wide operating temperature range, etc. make a large impact. The preparation of lithium battery slurry is divided into positive and negative electrode slurry. The positive electrode slurry is composed of binder, conductive agent, active material, and solvent. Whether the positive electrode slurry is evenly dispersed will directly affect the battery performance such as the capacity of the battery, and then affect the performance of the battery. service life. At present, there is no co...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for optimizing the dispersion of positive electrode slurry for lithium batteries in order to overcome the problem that the current lithium battery positive electrode slurry cannot be fully and uniformly dispersed during the preparation process, thereby adversely affecting the overall performance of lithium batteries.

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