Method of Operating Vehicle Powertrain Based on Prediction of How Different Chemical Type Batteries Connected in Parallel will Operate to Output Demanded Current

摘要

A powertrain having a battery system including at least two batteries of different chemical types connected in parallel is operated according to predicted responses of the batteries to a demanded current command for the battery system to output a demanded current. The battery responses are predicted directly from the demanded current using a backward-looking model of the battery system.

主权项

1. A method for a powertrain having a battery system including parallel connected batteries of different chemical types, comprising:
operating the powertrain according to predicted currents of the batteries for the system to output a demanded current, the currents predicted using a backward-looking model of the system which takes into account dynamics of open-circuit voltages and internal impedances of the batteries on states of charge of the batteries based on prior predicted currents of the batteries.