SOC Estimation of Lithium-Ion Battery Packs Based on Thevenin Model

Yuan Qi Fang; Xi Ming Cheng; Yi Lin Yin

doi:10.4028/www.scientific.net/AMM.299.211

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 299SOC Estimation of Lithium-Ion Battery Packs Based...

SOC Estimation of Lithium-Ion Battery Packs Based on Thevenin Model

Abstract:

Due to the immeasurability of SOC in battery and inevitability of error in current collection, SOC estimation of Lithium-ion battery has become a focus of EV research. With Thevenin equivalent circuit model, this paper employs EKF algorithm to estimate SOC, which takes into consideration both precision requirement of the estimation and amount of computation involved in online estimation. Based on above-mentioned objectives and principles, a test platform composed of Digatron battery test system and thermostat was built. Experimental result has confirmed that the combination of EKF algorithm with Thevenin model can improve precision and reduce amount of computation.

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Periodical:

Applied Mechanics and Materials (Volume 299)

Pages:

211-215

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.299.211

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Online since:

February 2013

Authors:

Yuan Qi Fang, Xi Ming Cheng, Yi Lin Yin

Keywords:

EKF, Lithium-Ion Battery, SOC Estimation, Thevenin Model

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