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Application of wireless power supply

       After bicycle sharing, sharing power bank has become another "window" highly sought after.
       Using magnetic resonance technology to realize wireless power supply, the power supply distance is less than half a meter, and the charging efficiency is very high. In a relatively short distance, the charging efficiency can reach more than 90%, which is almost the same as wired power supply. At present, their wireless power supply system has realized that the transmitting coil is within 10 cm of the receiving area. This means that the mobile phone can "move" at will within this distance, and it's OK to lift it up and put it down. In mobile phone charging, this charging method has the same power as that of charging on the charger.
       At present, the common wireless power supply in the market mostly adopts "electromagnetic induction coupling", that is, contact charging and induction charging. This method can be used for wireless charging of electric toothbrush, applewatch and Samsung S8 series new products. Every time charging, the product does not need to be connected to the power supply through the power cord. But wireless doesn't stop there. The charging base needs to be plugged in, and the product needs to be accurately pasted on the charging area of the charging board, with a distance of less than 5mm. At present, there are few public areas to provide wireless charging equipment, which is not conducive to personal carrying and inefficient.
       The advantage of wireless charging based on magnetic resonance technology is not only to improve the user experience of unsatisfactory contact charging, but also to realize the simultaneous charging of multiple devices. No matter the shell of mobile phone or other devices is metal or glass material, as long as there is a contact coil, it can be charged.