Slurry stability evaluation device and evaluation method

Abstract

A slurry stability evaluation device comprises a bracket, two pulleys are fixed on two sides of the bracket; a lead is connected between the two pulleys; two ends of the lead are respectively connected with a shaft rod and a weight disc; a test rod is arranged on the shaft rod, and salient points are distributed on the surface of the test rod; a measuring cup is arranged below the shaft rod; the mass of the weight disc is equal to the sum of the masses of the shaft rod and the test rod; the gravity resultant force of the shaft rod and the testing rod is larger than the buoyancy force borne by the testing rod when the testing rod is completely immersed in the slurry. The device is simple in structure, easy to operate, extremely convenient to assemble, disassemble, replace and clean and capable of being repeatedly used; wherein the test rod structure adsorbs agglomerates or gels in the suspended slurry, the mass of the agglomerates is visually displayed by accumulating the total mass of the weights, a stability curve of the slurry can be obtained through multiple tests, then the stability of a slurry system is judged, and the test efficiency, reliability and accuracy are evaluated to meet the requirements.

Description

technical field [0001] The invention relates to the field of slurry stability evaluation, in particular to a slurry stability evaluation device and evaluation method. Background technique [0002] The stability of lithium battery slurry is the most important basic index affecting the performance of electrodes and batteries. Among them, the slurry suspension system with good consistency, high uniformity, good dispersion and good stability directly affects the slurry coating surface. Density consistency, pole piece compaction flexibility, pole piece porosity richness, diaphragm resistivity, peel strength, and battery DCR resistance, rate temperature rise, electrode heating and long-term cycle life, etc. [0003] The evaluation method and equipment of slurry stability are very important. Generally speaking, the current technology has the following deficiencies: (1) The equipment cost of the viscometer is high, which increases the cost pressure of the enterprise; (2) The precisi...

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Problems solved by technology

[0003] The evaluation method and equipment of slurry stability are very important. Generally speaking, the current technology has the following deficiencies: (1) The equipment cost of the viscometer is high, which increases the cost pressure of the enterprise; (2) The precision requirement of the viscometer is high, and the maintenance cost Higher and difficult to repair; (3) The viscometer has a single function and can only characterize the viscosity change of the slurry, but the agglomeration phenomenon caused by van der Waals force and excessive surface energy between the fine particles inside the slurry cannot be seen; (4) Operation The method steps are more complicated, and it is not easy to achieve rapid evaluation and master the skills of the experimenter

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