The principle behind wireless charging for mobile phones is as follows: the charging base converts electric current into a magnetic field, and this magnetic field is constantly changing. There is a coil under the back cover of the phone. Because the magnetic field of the base is constantly changing, the magnetic flux in the coil also changes constantly, generating an induced electrodynamic force to charge the phone.
1. A wireless charger is a charger that connects directly to the device that needs charging, without the need for a traditional charging cable. It utilizes the latest wireless charging technology. It magically transfers electrical energy using the magnetic field generated between coils; inductive coupling technology acts as the bridge connecting the charging base station and the device.
2. Theoretically speaking, wireless charging technology is harmless to the human body. The resonance principle used in wireless charging is magnetic field resonance, which only transmits between coils resonating at the same frequency, and other devices cannot receive this frequency band. Furthermore, the magnetic field used in wireless charging technology itself is harmless to the human body.
3. Wireless charging also encounters some problems in application: the core wireless charging technology is not perfect; it is difficult to achieve long-distance transmission in the radiation area; long-distance positioning has too high hardware requirements; the magnetic field resonance high matching is small and controllable; the application range is limited and has not been extended; market factors and consumer psychology make developers unwilling to invest heavily in technology research and development.
4. Regardless of the final charging method or type of battery used, relevant national and local departments must conduct research on its frequency, safety, environmental protection, and energy conservation to avoid waste, adverse effects on human health, and new pollution to the environment. At the same time, they must ensure effective public awareness campaigns to avoid people's fear of electromagnetic fields.
