Journal
ELECTRIC POWER SYSTEMS RESEARCH
Volume 145, Issue -, Pages 73-82Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.epsr.2016.12.029
Keywords
Lyapunov stability; State-space observer; Parameter estimation; Temperature uncertainties; Lithium-ion batteries
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In this paper, a hybrid estimation technique is proposed for lithium-ion batteries. This strategy makes use of state-space observer theory to reduce the complexity of the design and the stability analysis. However, the battery's parameters knowledge is required for the state-space model, which limits the performance as the battery's parameters vary. Therefore, an online parameter identification strategy is proposed to track the parameters deviation. The stability of the closed-loop estimation scheme is guaranteed by Lyapuriov's direct method. Unlike other estimation techniques where temperature effects are ignored, this paper proposes a universal compensation strategy which can be used with many estimation algorithms available in the literature. The performance of the proposed scheme is validated through a set of experiments under different currents and temperatures along with comparison against an adaptive observer. (C) 2016 Elsevier B.V. All rights reserved.
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