Switched Capacitor Based Bidirectional DC-DC Converter for Photovoltaic Energy Storage System in Indian Electricity Demand Scenario Utilizing Secondary Life of Electric Vehicle Battery

The fossil fuel depletion and surge in electricity demand have paved the way to intense penetration of renewable energy sources, especially Solar. The growth in photovoltaic system and its peak power generation from 11 am to 3 pm, when the electricity demand is low, requires energy storage system (ESS) for efficient utilization of photovoltaic power generation. In this paper, Photovoltaic Energy Storage System in the Indian scenario is developed by considering the charging of Electric Vehicle (EV) Battery and Auxiliary Battery (AB) during the peak power generation of solar photovoltaic (SPV) system interfacing with power electronic converters. In this proposed work, the Secondary Life of High-Capacity EV battery is utilized as AB. Switched Capacitor (SC) based bidirectional DC-DC converter is used to interface the DC link voltage of SPV to the charging of the EV and AB. The proposed methodology is validated with hardware setup of SPV system, SC-based power converter and 18650 3000mAh Li-Ion cell used as EV and AB.