IoT-Based Wireless EV Charging System using Solar Energy

Abstract: This research presents a prototype of a wireless electric vehicle (EV) charging system that utilizes mutual induction and solar energy to charge a 3.7V (6600mAh) battery while monitoring key battery parameters. The system incorporates a battery monitoring system (BMS) powered by a NodeMCU ESP8266 microcontroller, which continuously tracks the state of charge, battery percentage, voltage, and environmental factors such as temperature and humidity during the charging process. The charging mechanism begins with a solar panel that charges a 12V main battery. This stored energy is then converted from 12V DC to 110V AC using a converter circuit, which supplies power to a set of transmitter coils embedded beneath a roadway platform. Through mutual induction, the receiver coil captures the transmitted energy. A TP4056 charging module then regulates the output to provide a stable 5V supply for efficient battery charging. To ensure real-time monitoring, a voltage divider circuit measures the battery voltage and transmits the data to the ESP8266 microcontroller, which displays the information on an OLED screen and sends updates to a Blynk IoT server. Additionally, a DHT22 sensor is integrated into the system to measure temperature and humidity levels, ensuring safe and efficient charging. This prototype demonstrates a sustainable, wireless EV charging approach that leverages renewable energy and real-time monitoring, offering a promising step towards the future of smart and eco-friendly transportation.