The wireless charging technology is a technology that uses a magnet to charge a device without using a wire. The wireless charging technology is derived from wireless power transmission technology, which uses magnetic resonance to transfer charge in the air between the charger and the device. The coil and the capacitor form a resonance between the charger and the device to realize efficient energy transmission.


Wireless charging technology adopts unified industry standards. In the next few years, new low-energy, high-compatible wireless chargers can be used for mobile phones, digital devices, and mobile devices.


Long-distance wireless charging


Wireless charging is also safer, without connectors, and potential safety hazards such as leakage and power running are completely avoided. Some people are worried about the radiation problem. This technology was first used in water purifiers. It has been 8 years since then. The safety has been verified by 36 countries and will definitely not cause harm to the human body and the environment. According to reports, wireless charging is basically the transmission of energy through magnetic fields, and most objects around humans and humans are non-magnetic. Another advantage of wireless charging is power saving. The performance of wireless charging devices is about 70%, which is equal to wired charging devices, but it has a full auto-shutdown function to avoid unnecessary energy consumption. And this performance acceptance rate is constantly improving, and will soon reach 98%.


Wireless charging devices are much more “smart” than ordinary wired chargers. For different electronic products, the power interface can automatically respond. When charging is required, the transmitter and receiver chips will automatically start working at the same time. When fully charged, it will automatically shut down. It also automatically recognizes different equipment and energy requirements.

Now, for the safety of consumers and their convenience, relevant researchers first provide near-field wireless charging technology, and they are also studying long-distance wireless charging, which will be an emerging market. In fact, the current technology can achieve efficient power transfer within the range of 3 feet to 4 feet, but this needs to be verified by relevant organizations. I believe that in the next 5 to 10 years, even faster, long-distance wireless charging will enter everyone’s life.


From the perspective of technological development, wireless charging technology is based on the development of RFID close-range magnetic field coupling technology, and the mobile phone can install charging coils and rectifier chips without even software changes. There are several types of installation methods:


First: an induction coil + chip, which constitutes a separate component. These components are as small as coins and as large as 38x40mm. The coil is wound with a metal copper wire.


Second: the mobile phone lithium battery peripheral frame is equipped with a coil, known as wireless rechargeable lithium battery. The advantage of this type of battery is that it is easy to install, but the defects are also obvious. Because the mobile phone battery is a metal piece, it will block the electromagnetic wave penetration of charging, making the charging efficiency low.


Third: using LDS technology, the laser antenna on the plastic casing of the mobile phone.


Fourth: the use of FPC (flexible circuit board) to manufacture antenna components, the disadvantage is expensive. The advantage is that it is flexible and thin, making it easy to install.


The most promising of the above types of methods is LDS technology. The domestic launch of a series of micro-aviation laser plastics, magnetic laser plastics, and fully automatic large-format high-speed laser machines have made the manufacturing process popular.

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