State-of-Charge Estimation of Supercapacitors for Reconfigurable Circuits

The State-of-Charge (SOC) estimation for super-capacitors has been thoroughly examined in the literature, while the majority of the research to far is concentrating on the SOC estimation of single supercapacitor units. Nevertheless, the system dynamics of the battery may shift to a different system when utilizing the recently suggested reconfigurable circuit, suggesting that the straightforward use of current SOC estimate techniques is not possible. In order to assess the battery's state of charge (SOC), we use a switching systems technique in this paper. We establish the supercapacitor's RC model with a reconfigurable circuit and carefully investigate the continuity of the state and observability of the switched system. Afterwards, we propose a switching observer and compare the performance of various observers, analyzing its convergence qualities. We compare the proposed observer with other observers through a hardware platform, and the experimental results prove the superiority of the proposed observer in SOC estimation.