Averaging Battery Model for a Lead-Acid Battery Operating in an Electric Car

摘要

Computer programs used to calculate the performance of an electric vehicle must contain a battery model. A simple mathematical model is developed and evaluated. The model is based on time averaged current or power required from a battery during the operation of the electric vehicle. The time averaging technique used accounts for time varying discharge rates, rest times, and the electrical regenerative braking that are normally experienced by a battery in an electric vehicle. The averaging battery model reported herein, has been verified through comparisons with test data gathered on batteries in the laboratory and from vehicles operated at test tracks. The averaging battery model accurately predicts the performance measured for lead-acid batteries operating in accordance with the power and current requirements of the various deriving schedules specified in the SAE Recommended Practice, Electric Vehicle Test Procedure - SAE J227a. (ERA citation 05:013865)