The principle of wireless charging of mobile phones is that the charging base is responsible for turning the current into a magnetic field, and it is a constantly changing magnetic field. There is a coil under the back cover of the phone. Since the magnetic field of the base is constantly changing, the magnetic flux in the coil is also constantly changing, generating an induced electromotive force for charging.
1. wireless charger refers to a charger that is directly connected to the terminal device that needs to be charged without using a traditional charging power cord. It uses the latest wireless charging technology. Using the magnetic field generated between the coils to magically transfer electrical energy, inductive coupling technology will become a bridge between charging base stations and devices.
2.In theory, wireless charging technology is harmless to the human body. The resonance principle used in wireless charging is magnetic field resonance, which is only transmitted between coils that resonate at the same frequency, and other devices cannot accept this band. In addition, the magnetic field used in wireless charging technology itself is harmless to the human body
3.Wireless charging also encounters some problems in the application: the core wireless charging technology is not perfect; the radiation area is difficult to achieve long-distance transmission; the long-distance positioning requires too much hardware; the magnetic resonance height matching can be small; the application scope is limited, It has not been extended; market factors and consumer psychology have made developers reluctant to vigorously carry out technology research and development.
4. Regardless of the final charging method and the battery used, the relevant national and local departments should conduct research on its frequency, safety, environmental protection, energy saving, etc., to avoid waste, avoid adverse effects on human health, and avoid The environment will cause new pollution, and at the same time, publicity must be in place to avoid people's fear of electromagnetism.
Post time: Jun-06-2022