Study of Lithium Battery Fluctuations in the Open-Circuit Conditions

Abstract

Fluctuations in electrochemical systems strongly depend on the electrochemical processes taking place therein; therefore study of fluctuation phenomena becomes important for diagnostics of such type of systems. In the framework of this paper, the experimental data obtained during the discharge of the Li-Ion battery (ICR 18650) with nominal voltage of 3,6 V and capacity 2,6 A.h are analyzed. The measurements were carried out in open-circuit conditions for different battery state-of-charge. Fluctuations in open-circuit conditions comprise new information that allows enhancing the diagnostic properties of electrical fluctuations. The corresponding properties can be used as a basis for efficient diagnostic systems of lithium batteries. The possibility of analysis in the in open-circuit conditions makes it possible to realize non-destructive testing of batteries without changing their actual technical state and include primary batteries into the scope of application.