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The remaining useful life (RUL) and state-of-health (SoH) are critical to battery management system (BMS) to ensure the safety and reliability of electric vehicle (EV) operation. Recent literatures have reported various methods to estimate the RUL and SoH with a focus on the capacity loss, internal resistance increase, voltage drop, self-discharge, number of cycles, etc. However, most of the works...
A state of charge (SOC) estimation is required to work well over a wide range of conditions. In this study, a multi-gain observer based on classified conditions is proposed in order to estimate SOC efficiently. The feedback gain in the observer is switched by a proposed geometry classifier to categorize the voltage error into different groups so that the observing strategies can be designed for different...
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