Generalized Lead-Acid based Battery Model used for a Battery Management System

Abstract

This paper deals with the determination of a battery model for different designs of lead-acid based batteries. Although batteries with gelled electrolyte and absorbent glass mat (AGM) batteries are based on the chemistry of common lead-acid batteries they differ in regards to the parameters of a battery model. In this paper several measurement methods for the identification of these parameters are presented. These parameters enable the establishment of a battery model. A precise battery model can provide the basis for a battery management system (BMS). A BMS is required due to the rising number of electrical components in modern vehicles making it necessary to control the current capability of the battery. The results presented in this paper indicate that every battery type needs a specially optimized battery management system as the behaviour and the characteristic qualities vary between the different designs.