A contactless power transfer in electric vehicles for battery charging

In the current age of wireless communication among multiple devices, including mobile phones, laptops, wireless speakers, and more, the power supply for these devices remains predominantly reliant on wired connections or energy storage solutions such as batteries. These batteries, in turn, necessitate contact-based chargers for recharging. This paper presents a foundational exploration and blueprint for a contactless battery charger that facilitates bidirectional energy transfer for electric vehicle (EV) applications. The proposed design incorporates renewable energy sources and grid power, which feed into a voltage-to-voltage converter responsible for transmitting power through a wireless air gap using a Tesla coil. This transmitted flux is subsequently harnessed by a receiving Tesla coil and converted back into voltage, facilitating the charging or energy storage of batteries [15]. This contactless charging mechanism holds immense potential across a spectrum of applications, including EV charging stations, wearable contactless jackets, mobile EV charging for roadsters in transit, military border deployments, contactless propulsion systems, and more. It offers the advantage of obviating the need for heavy and cumbersome batteries, along with the associated bulky wiring and high installation costs. The system design encompasses variable power transfer capabilities ranging from 12 volts to 100 volts, with a current capacity of up to 5 amperes and a minimum operating distance of 1 meter.