Selected Properties of the Hybrid Micro-Installation Model Based on Electrochemical Battery and PV Module

Abstract

In this paper, a theoretical model of an electrochemical battery connected with three diode model of a photovoltaic module is presented. To calculate selected parameters of the electrochemical battery model an iteration-approximation method has been employed. Then there are presented chosen curves of LiFePO4 batteries obtained from the experimental research and simulation of the thermal-electrochemical model well known as a combined model. Moreover, by using a combined model, the heat generation of the battery has been calculated. The model was prepared to analyze the influence of selected thermodynamic and electrochemical parameters including the shunt resistance value, series resistance value, solar radiation power density on the photovoltaic module power value for winter and summer season. As a result of the performed simulations with photovoltaic (PV) module and without PV module in the specific daily cycle, the curves of battery state of charge (SOC) have been shown. The presented results inform about the dynamic operation of the simulated LiFePO4 batteries which are integrated with PV module in hybrid micro-installation.