METHOD AND SYSTEM TO CONTROL AND MONITOR A VEHICLE BATTERY PACK USING A BATTERY IMPEDANCE MODEL

Abstract: an electrified vehicle (ev) includes a battery pack, one or more sensors, and a vehicle controller. the battery pack includes a plurality of battery cells and is operable to provide at least a portion of propulsion power. the vehicle controller is configured to charge and discharge the battery pack according to power limits defined by output of a battery impedance model. the battery impedance model associates battery impedance values with frequency-dependent polarization impedance values representing diffusion states of the battery cells, and receives measured parameters from the one or more sensors indicative of the frequency-dependent polarization impedance values of the battery pack.

Inventor(s): David Bilby, Nathan Kempema, Richard Dyche Anderson

CPC Classification: B60L58/12 (responding to state of charge [SoC])

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