Experimental Evaluation of Aging Indicators for Lithium–Iron–Phosphate Cells

Degradation mechanism of batteries has to be carefully studied when considering their utilization in electrical power systems. This paper presents the results an extensive experimental campaign, through which three different lithium–iron–phosphate (LFP) cells were subjected cycling stresses. The purpose campaign was evaluate cells’ aging, as well try find parameters on cell behavior before its end life, able act state-of-life (SOL) (or aging) indicators. considered stress consists cyclic repetition fixed-duration discharge steps, followed by full charge phases. under study very same pattern but with and levels: low, medium, high. showed that end-of-discharge voltage internal resistance can used good SOL However, both are significant functions conditions, such state (SOC) temperature.