Charge analysis for Li-ion battery pack state of health estimation for electric and hybrid vehicles

The aging monitoring of Lithium-ion batteries (LIBs) represents a critical point for electrified vehicle applications. Consumers may expect their vehicle to have a steady autonomy range and available power throughout the lifetime of their cars. Several embedded solutions exist in the literature. In this paper two new approaches are suggested to enrich the existing solutions. To that extent, capacity fading is studied using exchanged energy during charging events. What's more, power fading is assessed using direct current resistance (DCR) and voltage measurement at the beginning of charge events. Both solutions produce reliable state of health measurements SoH with significantly good accuracy.