Modelling, Parameter Identification, and Experimental Validation of a Lead Acid Battery Bank Using Evolutionary Algorithms

Abstract

Accurate and efficient battery modeling is essential to maximize the performance of isolated energy systems and to extend battery lifetime. This paper proposes a battery model that represents the charging and discharging process of a lead-acid battery bank. This model is validated over real measures taken from a battery bank installed in a research center placed at “El Chocó”, Colombia. In order to fit the model, three optimization algorithms (particle swarm optimization, cuckoo search, and particle swarm optimization + perturbation) are implemented and compared, the last one being a new proposal. This research shows that the identified model is able to estimate real battery features, such as state of charge (SOC) and charging/discharging voltage. The comparison between simulations and real measures shows that the model is able to absorb reading problems, signal delays, and scaling errors. The approach we present can be implemented in other types of batteries, especially those used in stand-alone systems.

Analisis dan Pengukuran Rangkaian Pengisi Baterai pada Beberapa Produk Lampu Baca

“…Salah satu perbaikan adalah dengan memodifikasi metode tersebut diunjukkan pada [9]. Sedangkan untuk sistem baterai yang lebih kompleks, maka diperlukan pemodelan yang lebih tepat, seperti pada [10] yang berhasil menerapkan algoritma Particle Swamp Optimization and Perturbation untuk memodelkan SOC battery bank yang terdiri dari 24 baterai.…”

Description of Acid Battery Operating Parameters

“…The operating characteristics of the acid battery are the object of research and modeling for the implementation of many practical and theoretical objectives: the evaluation of the correlation of the starting parameters of the internal combustion engine [3]; the design of the internal combustion engine start-up systems [4]; the analysis of the dynamic properties of the battery in electric vehicles [5]; the possibility of using the characteristics in the process of diagnosing the internal combustion engine and its starting system [6]. In the case of the lead-acid battery model in electric or hybrid vehicles, the charging and discharging process is of great importance, i.e., a charging/discharging voltage and state of charge (SoC) [7]. Very often the model of the lead-acid battery for the Stop-Start Technology is a circuit model with two resistance-capacitance (RC) blocks [8].…”

Description of acid battery operating parameters

“…For a lead-acid battery model in electric or hybrid car the charging and discharging process is very important i.e. charging/discharging voltage and the state of charge (SOC) [2]. Very often lead-acid battery model for Stop-Start Technology is a circuit model with two resistance-capacitance (RC) blocks [10].…”