Method for determining power limit of battery i.e. lithium ion battery, for vehicle, involves modeling characteristics of battery based on parameters of resistor and capacitor of equivalent circuit

摘要

The method involves determining a threshold value of an electrical parameter of a battery using an equivalent circuit (10). Characteristics of the battery are modeled based on parameters of a resistor (20) and a capacitor (22) of the equivalent circuit. The determined threshold value of the electrical parameter of the battery is compared with a value, which represents a specification of the battery. Aging of the battery is considered based on a correction factor of capacitance or internal resistance. A power limit of the battery is determined for time period of up to 20 seconds.