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• W3154261610 abstract "The present work focuses on the state-of-charge (SOC) estimation of a lithium-ion battery in terms of a second-order extended Kalman filter (EKF). First, an equivalent circuit model is introduced to describe the performance of lithium-ion batteries. The model parameters are then identified through hybrid pulse power characterization experiments conducted over a wide range of temperatures (−10 to 55°C). A two-dimensional mathematical relationship is established with respect to the SOC and temperature based on a dual-fifth polynomial expression. The main effects and sensitivities of the SOC and temperature on the parameters are analysed according to the principle of variance analysis and partial derivatives. An estimation algorithm is developed, which combines the two-dimensional parameter model and second-order EKF. Finally, the proposed approach is validated compared to other estimation schemes through discharge experiments under extreme temperatures and dynamic loading profiles, which yields experimental results that estimate the SOC with an absolute error of less than 4.5% under harsh conditions. This not only demonstrates that it can characterize dependency of the model parameters on the operating conditions and address the uncertainty of model parameters, but also verifies the advantage of present method at low temperatures especially at sub-zero temperatures." @default.
• W3154261610 created "2021-04-26" @default.
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• W3154261610 date "2021-04-20" @default.
• W3154261610 modified "2023-09-25" @default.
• W3154261610 title "State‐of‐charge estimation technique for lithium‐ion batteries by means of second‐order extended Kalman filter and equivalent circuit model: Great temperature robustness state‐of‐charge estimation" @default.
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• W3154261610 doi "https://doi.org/10.1049/pel2.12129" @default.
• W3154261610 hasPublicationYear "2021" @default.
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