The application principle of wireless charging coils

The application principle of wireless charging coils

The business opportunities for wireless charging coil modules are becoming increasingly prominent. Benefiting from the rapid development of the wireless charging market, the demand for transmitter (Tx) and receiver (Rx) coil modules has also surged significantly, driving a sharp increase in global shipments of coil modules. At the same time, domestic and international coil manufacturers have flocked to enter the market, intensifying fierce competition in the coil module market. Fuying Coil has been producing wireless charging coils since 2012, and its shipments have now exceeded 80,000K, gaining a renowned reputation in the industry. 

With more and more high-end smartphones supporting wireless charging technology, the demand for coil modules from mobile phone and charging pad equipment manufacturers has been growing day by day. In addition, the launch of medium-power wireless charging products in recent years has made high-end coil modules with better coupling efficiency a new favorite in the market, expanding the market scale of wireless charging coils.

Coil modules are composed of magnetic shielding sheets and copper coils, accounting for nearly 40% of the cost of wireless charging modules. Among them, the function of the magnetic shielding sheet is to prevent electromagnetic interference from affecting mobile communication chips, while the coils are responsible for generating or receiving power energy. Both play a pivotal role in wireless charging modules, and their quality directly affects the efficiency of wireless charging.

At present, the main products with large shipments from Fuying Coil are single-coil modules, whose application markets cover all current wireless charging products. Next are multi-coil modules with a wider charging range. However, the cost of multi-coil modules is 1.5 times that of single-coil modules, so this solution is only adopted in mid-to-high-end devices.

In the future, for coil manufacturers to succeed in the market, they must continuously reduce the cost of magnetic shielding sheets through new processes, further reduce the width of the coils, and at the same time optimize the coil coupling efficiency to the best level, so as to have the opportunity to continue to thrive in the wireless charging coil market.