A Review of Critical State Joint Estimation Methods of Lithium-Ion Batteries in Electric Vehicles

Battery state of charge (SOC), health (SOH), and power (SOP) are decisive factors that influence the energy-management system (EMS) performance electric vehicles. However, accurate estimation SOC, SOH, SOP remains a challenge due to high nonlinearity battery dynamic characteristics strong coupling among states. In this paper, different methods single-state two-state joint classified discussed, including SOC/SOH SOC/SOP methods, their advantages limitations analyzed. On basis, key issues multi-state suggestions for future work made.