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Comparison of Optimization Techniques for Lithium-Ion Battery Model Parameter Estimation
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 01, 2014 by SAE International in United States
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Due to rising fuel prices and environmental concerns, Electric Vehicles (EVs) and Hybrid Electric Vehicles (HEVs) have been gaining market share as fuel-efficient, environmentally friendly alternatives. Lithium-ion batteries are commonly used in EV and HEV applications because of their high power and energy densities. During controls development of HEVs and EVs, hardware-in-the-loop simulations involving real-time battery models are commonly used to simulate a battery response in place of a real battery. One physics-based model which solves in real-time is the reduced-order battery model developed by Dao et al. , which is based on the isothermal model by Newman  incorporating concentrated solution theory and porous electrode theory .
The battery models must be accurate for effective control; however, if the battery parameters are unknown or change due to degradation, a method for estimating the battery parameters to update the model is required. A set of manufacturer recommended battery parameters were evaluated using a numerical sensitivity analysis to evaluate their identifiability. The parameters chosen to be identified were εp, εs and brugg. The optimization algorithms that were evaluated for parameter estimation were: Self-Adaptive Evolution, Efficient Global Optimization, Differential Evolution, and Simulated Annealing. These algorithms were evaluated based on how many simulation calls were required to converge to an accuracy of 1e-4. Differential Evolution was shown to have the best performance in estimating the parameters, requiring an average of 1485 simulations to converge.
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CitationIng, A., Masoudi, R., McPhee, J., and Dao, T., "Comparison of Optimization Techniques for Lithium-Ion Battery Model Parameter Estimation," SAE Technical Paper 2014-01-1851, 2014, https://doi.org/10.4271/2014-01-1851.
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