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Electrothermal battery model identification for automotive applications

Electrothermal battery model identification for automotive applications,10.1016/j.jpowsour.2010.06.037,Journal of Power Sources,Y. Hu,S. Yurkovich,Y.

Electrothermal battery model identification for automotive applications   (Citations: 3)
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This paper describes a model identification procedure for identifying an electro-thermal model of lithium ion batteries used in automotive applications. The dynamic model structure adopted is based on an equivalent circuit model whose parameters are scheduled on the state-of-charge, temperature, and current direction. Linear spline functions are used as the functional form for the parametric dependence. The model identified in this way is valid inside a large range of temperatures and state-of-charge, so that the resulting model can be used for automotive applications such as on-board estimation of the state-of-charge and state-of-health. The model coefficients are identified using a multiple step genetic algorithm based optimization procedure designed for large scale optimization problems. The validity of the procedure is demonstrated experimentally for an A123 lithium ion iron-phosphate battery.
Journal: Journal of Power Sources - J POWER SOURCES , vol. 196, no. 1, pp. 449-457, 2011
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    • ...This requires that the estimator takes into account the actual cell temperature, as it dramatically affects the cell performance [4]‐[6]...
    • ...Fig. 4. Total series resistance (R tot =R series +R tshort + R tlong ) as function ofSoCrelated to 1C rate discharge test at the three test temperatures...
    • ...As an example, Fig. 4 shows the total series resistanceR tot , which increases at low temperatures, accounting for the decrease of the usable cell capacity at low temperatures, as shown in Fig. 1...
    • ...This is due to the littleOCVdependence on temperature, while there is a large difference between the model series resistance at10 ◦ Cand25 ◦ C(see Fig. 4)...

    F. Barontiet al. State-of-charge estimation enhancing of lithium batteries through a te...

    • ...Due to various dynamics that characterize battery behavior, it is only possible to obtain an accurate OCV measurement after a long rest period (often several hours) [10]...

    Akram Eddahechet al. LiPo batteries modeling for mail delivery electric vehicles

    • ...Due to various dynamics that characterize battery behavior, it is only possible to obtain an accurate OCV measurement after a long rest period (often several hours) [11]...

    A. Eddahechet al. Lithium-ion cell modeling from impedance spectroscopy for EV applicati...

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