Estudo comparativo entre modelos computacionais e resultados experimentais na carga e descarga de baterias de chumbo-ácido

Abstract

This work presents the results achieved in the search for a reliable and practical method for determining the state of charge of lead-acid batteries used in electric wheelchairs through computer simulation using Matlab - Simulink. The methodology consists of the behavioral analysis of the battery pack powering the electric wheelchair, by calculating the integration of net current flow from the battery at any given time t. Using an electric circuit diagram as a model of lead-acid battery has run a simulated model of a lead acid battery where the loading and characteristic discharge were estimated based on input values provided by the manufacturer or user specifications. An investigation of the response of the discharge of lead acid batteries by comparing theoretical and practical results on the stability of transient voltage at a maximum load condition. It was performed to compare the response of the batteries with increasing load demand. In addition, an investigation into the feasibility of using these batteries applied to the current system by checking the results achieved with the data provided by the manufacturers manual. The results obtained in the tests and simulations showed similarity in their charge and discharge values, which proved good performance of the model.