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Wireless Charging

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Wireless Charging

As a radio energy transmission technology, wireless charging has four technical routes, namely magnetic induction, magnetic resonance, microwave and electric field coupling, according to the different principles of electric energy transmission. At present, the magnetic induction wireless charging products that have achieved mass production are mainly magnetic induction wireless charging products. The basic working process is: the transmitting coil of the charging base sends a signal, which can search the nearby receiving coil; After sensing the receiving coil, the current in the transmitting coil starts to flow around the coil and starts electromagnetic induction; The receiving coil generates induced current based on electromagnetic induction to charge the electrical equipment. NdFeB permanent magnetic material is an important manufacturing material for the positioning module of the wireless charger. It mainly provides the positioning function for the magnetic wireless charger, which facilitates the rapid and correct positioning of the terminal equipment and maximizes the charging efficiency. At the same time, it can enhance the magnetic flux between the transmitting and receiving coils and improve the transmission efficiency.
Wireless charging is a major innovation in the user experience of traditional terminal devices. Consumer electronics is the largest demand market for wireless charging at present, accounting for about 80% of the market demand [China Magnetic Materials and Devices Industry Yearbook (2020) P117]. As the standardization of wireless charging continues to advance, and charging efficiency and convenience continue to improve, the global wireless charging market will usher in rapid growth. In 2016, the global wireless charging market will be about 3.4 billion dollars, and it is estimated that the global wireless charging market will reach 14 billion dollars by 2022, The compound annual growth rate from 2016 to 2022 reached 27% [Soochow Securities, SVW (300136. SZ) slot wireless charging and 5G RF components have sufficient long-term growth momentum, 2019, P2]. At the same time, wireless charging also has great application potential in the Internet of Things and automotive electronics market, which can solve the application pain points of various charging scenarios. Therefore, wireless charging is expected to migrate from consumer electronics to other application scenarios in the future, driving the rapid growth of market demand for wireless charging products and NdFeB permanent magnetic materials.