Electric battery i.e. lithium-ion battery, voltage determining method for e.g. electric vehicle, involves measuring state of charge level of battery, and utilizing voltage pattern of battery to determine voltage level of battery

摘要

The method involves determining a voltage model (130) for calculating voltage at terminals of a battery i.e. lithium-ion battery, in accordance with a level of a charge state. A voltage pattern is determined at the terminals of the battery based on intensity of current passing through the battery. Internal resistance of the battery is determined. A state of charge level of the battery is measured (125). The voltage pattern of the battery is utilized (126) to determine voltage level of the battery.