Densimeter and method for testing density of battery slurry

Abstract

The densimeter comprises a top cover, a measuring tube, a counter weight and a positioning strip, an opening is formed in the upper end of the measuring tube, the counter weight is loaded into the measuring tube from the opening, the bottom of the measuring tube is of a cone structure, the top cover is arranged at the upper end of the measuring tube and used for sealing the opening, scale marks are arranged on one side of the measuring tube, the positioning strip is arranged on the side, provided with the scale marks, of the measuring tube, and a groove hole is formed in the top cover. The slotted hole penetrates through the top cover. The densimeter is used for measuring whether the density of lithium battery slurry with high viscosity is uniform or not, the slurry stirring effect can be judged conveniently, parameter adjustment and optimization can be conducted on the stirring process conveniently, sampling is easy and convenient when the densimeter is used, the measuring speed is high, errors are small, the accuracy is high, and the densimeter is suitable for rapidly obtaining density data of the high-viscosity slurry in real time. The invention also relates to a method for testing the density of the battery slurry.

Description

technical field [0001] The invention relates to the field of lithium battery slurry, in particular to a density meter and a method for testing the density of battery slurry. Background technique [0002] The pole piece manufacturing process is the core content of the entire lithium-ion battery manufacturing, which is related to the electrochemical performance of the battery, and the properties of the slurry directly affect the performance of the lithium-ion battery. Lithium-ion battery slurry is a non-Newtonian fluid. Slurry is a highly suspended system formed by mixing and dispersing solid powder and liquid, which has typical characteristics of non-Newtonian fluid. [0003] The density of the slurry is an important parameter to reflect the consistency of the slurry. The dispersion effect of the slurry can be verified by testing the slurry density at different positions. When the slurry is well dispersed, the density of the slurry will be more uniform everywhere. Commonly u...

AI Technical Summary

Problems solved by technology

The measuring principle of the float type density meter is the Archimedes principle, the structure is the simplest, and the floats of different ranges are often used together in the measurement. The disadvantage is that it is troublesome to replace multiple floats when using it; The balance-type density meter converts the density of the liquid to be measured by measuring the difference between the gravity of the standard block in the air and the liquid to be measured by the balance; the static pressure and vibration liquid density meters use the pressure and vibration characteristics of the liquid and the liquid Density-related principles, but when testing high-viscosity liquids, especially high-viscosity lithium battery slurry with air bubbles, the error is large; radioisotope density meters have a greater impact on human safety because they contain radioactive sources Hidden danger

The current density meter cannot measure the density of the high-viscosity lithium battery slurry simply, quickly and accurately, and when testing the density of different positions of the high-viscosity lithium battery slurry to verify the dispersion effect of the slurry, it is necessary to adjust the float several times or Standard parts, cumbersome operation process

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