Mengzeng Cheng

Jul 26, 2023 | mdpi.com | Simin Peng |Ao Zhang |Dandan Liu |Mengzeng Cheng

Abstract:Accurate state of charge (SOC) estimation is helpful for battery management systems to extend batteries’ lifespan and ensure the safety of batteries. However, due to the pseudo-positive definiteness of the covariance matrix and noise statistics error accumulation, the SOC estimation of lithium-ion batteries is usually inaccurate or even divergent using Kalman filters, such as the unscented Kalman filter (UKF) and the square-root unscented Kalman filter (SRUKF).