SMART BATTERY MANAGEMENT SYSTEM FOR PV APPLICATIONS

Abstract

Currently the most commonly used storage technology for photovoltaic application (PV) are batteries. The problem is that PV system are not an ideal source for charging batteries. As the output of the PV is not constant, it vary according to the sun position. So, a battery management system (BMS) is required. The main aim of BMS is to optimize the use of battery and prolong the life of a battery in order to making the overall system more reliable and cost effective. Many monitoring techniques are used to monitor the battery state of charge, temperature, power, voltage and charging/discharging of current. For monitoring purpose, digital and analog sensors with microcontrollers are used. The battery information and the obtained results explaining the main characteristics of the system are presented by the LCD screen. The control strategy employed on electrical properties of Dry cell/Acid regulated batteries by the battery management system (BMS) of a PV application. This project also covers a cost effective Battery Testing System (BTS) which will provide constant charging and discharging of current, voltage and power simultaneously. Moreover, a Dc to Dc boost converter, lab view program and an MPPT algorithm will also be designed for improving the charging and discharging of the battery.