On-line SOC Estimation of Battery for Wireless Tram Car

In recent years, the battery driven tram car (wireless tram) is researched and developed. The important information for the system is the battery state-of-charge (SOC) during the tram operation. SOC can be estimated by calculating battery open-circuit-voltage (OCV). In this paper, on-line SOC estimation by equivalent circuit in the current fluctuating condition is described. The experimental result will be also shown.