SOC Estimation Algorithm for the Lithium-Ion Battery by Using a Linear State Observer

선형 상태 관측기를 이용한 리튬이온 배터리의 SOC 추정 알고리즘

Lithium-Ion batteries have become the best tradeoff between energy, power density and cost of the energy storage system in many portable high electric power applications. In order to manage the battery efficiently State of Charge (SOC) of the battery needs to be estimated accurately. In this paper a model-based approach to estimate the SOC of the Lithium-Ion battery based on the estimation of the battery impedance is proposed. The validity and feasibility of the proposed algorithm is verified by the experimental results.