Current situation and breakthrough of wireless charging technology

With the rapid development of smart devices and the Internet of Things (IoT), wireless charging technology has gained increasing attention. However, its practical applications still face challenges such as significant efficiency loss due to transmission distance, interference from multiple coupled devices, and energy loss caused by thermal effects. This paper explores two core wireless charging technologies-electromagnetic induction and magnetic resonance-through literature review, experimental analysis, and case studies. It systematically examines their theoretical foundations, application scenarios, key performance indicators, and commonly used data sources. By analyzing typical applications in smartphones, electric vehicles, and smart home devices, this study identifies the limitations of current technologies in terms of efficiency, transmission distance, and safety. Furthermore, future directions for innovation and expanded application scenarios are discussed. The findings provide theoretical support and practical insights for advancing wireless charging technology, highlighting the need for further research to enhance its efficiency, stability, and scalability.