A review on wireless charging methods – The prospects for future charging of EV

Abstract

In the current scenario, the impact of the automobile sector on greenhouse gas emissions becomes inevitable. Considering the case, automobile manufacturers pay attention to commercializing Electric vehicles (EVs) in a wide range. The effective functioning of the electrified vehicle system is highly determined by its charging infrastructure. This paper presents a comparative analysis of wired and wireless charging methods, followed by an overview of the evolution of the Wireless Power Transfer (WPT) system. WPT system’s performance is flexible, safe, reliable, and cost-effective operation retains its essentiality in the research area for further development in contactless charging methods. In recent years, EV battery charging is dominated by the attractive concept of wireless power transfer with the capability of automatic power transmission without human assistance. Planar pad structures such as polarized and non-polarized pads and compensation networks like SS, SP, PS, and PP are used in the inductive power transfer system to achieve high power transmission. This literature review briefly compares different charging pads and various compensation techniques used in WPT. The prominent role and essentiality of different stages of power converters in the WPT system are highlighted in detail. The effect of EV charging on the grid, the bidirectional capability of EVs, and the strategy of charge management are mentioned. The paper particularly brings out the essentiality of integrating Renewable Energy Sources (RES) with EVs in concern with environmental health. At last, the short notes on the status of the WPT system in the Indian scenario, and the future challenges like safety, health management, Foreign Object Detection (FOD), and economic criteria in the progress of wireless EV charging systems are also addressed.