The invention discloses an evaluation method of the stability of
lithium-
ion battery positive and negative
electrode paste. The method comprises the steps that
viscosity variation in the process that the rotating speed changes from low to high and
viscosity variation in the process that the rotating speed changed from high to low are tested respectively, and two curves of the paste
viscosity changing along with the rotating speed are drawn respectively; the
repeatability of the curves of the paste viscosity changing along with the rotating speed is analyzed, the stability of the positive and negative
electrode paste is judged afterwards, when the
repeatability of the two curves is good, it is shown that the stability of the positive
electrode paste or the negative electrode paste is good, and when the
repeatability of the two curves is poor, it is shown that the stability of the positive electrode paste or the negative electrode paste is poor. By means of the evaluation method of the stability of the
lithium-
ion battery positive and negative electrode paste, the stability of the paste can be judged very rapidly and easily, the reproducibility of the test is very good, the test is very accurate, the practicability is very good, and a very effective and practical method can be provided for stability evaluation of the
lithium-
ion battery positive and negative electrode paste.