State parameter estimation of lead-acid battery pack using impulse excitation method

Bence Csomos, Gabor Kohlrusz, Denes Fodor

Abstract

This paper describes an analysis of impulse excitation method to determine initial parameters of lead-acid battery model. The initial model parameters are essential inputs of state predictors and significantly influence the precision of SoC and SoH tracking.<BR />Two types of Randles-model have been introduced where the model parameters were exploited from the impulse excited voltage response of a battery. Current impulse excitation approach is resourcesaving and convenient way to generate excitation signal by for example, switching relays especially in automotive systems. Switching a relay through a load causes a squarewave-like change in the battery current. Either is a load current or charging current, the battery’s voltage response depends on the actual battery’s SoC and SoH. Using the discharge stages of voltage response characteristic of an Exide 15Ah AGM type battery, resistive and capacitive components of the battery model has been determined. The proposed model and method show promising results to set the initial parameters for state estimators.

Download

IMEKO-TC10-2017-012.pdf

DOI

-

IMEKO TC

TC10 - Measurement for Diagnostics, Optimization and Control

Back to the proceedings