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Is it necessary to charge the charging line? Where is the future of wireless charging?
Most people go to Starbucks for three purposes: drinking coffee, wiping Wi-Fi, and charging your phone. The problem, however, is that the first two purposes are easier to implement, and the number of seats near the charging outlet is limited. In case you encounter a few customers who are occupying the seat charge, then you should wait.
As the number of intelligent terminals owned by individuals continues to increase, how to charge these terminals more conveniently becomes a major direction for the industry to explore. According to the US market research and research company IHS survey, about 70% of smartphones charge at least one phone every day, and 30% charge more than twice a day. Therefore, the emergence of wireless charging technology has brought about a revolution in the charging method of smart terminals. Recently, Starbucks launched the latest service in the United States, and will gradually set up free mobile wireless charging points in various stores, and the first test in Los Angeles.
Driven by technological evolution and demand, wireless charging technology is rapidly maturing and moving into real-world applications. So, will wireless charging technology be a short-lived or a future trend? Are we really going to enter an era where charging does not have a "line"?
Wireless charging technology (Wireless chargi ng technol ogy), derived from wireless power transmission technology. Inductive charging and non-contact inductive charging are devices that use near-field induction, that is, inductive coupling, to transfer energy to a power supply by a power supply device (charger), which uses the received energy to charge the battery, and At the same time, it is used for its own operation. Since the charger and the electric device transmit energy by inductive coupling, there is no need to connect the wires between the two, so that the charger and the electric device can be exposed without conductive contacts.
The current mainstream wireless charging technology mainly has -
Electromagnetic Inductive Charging The primary coil has a certain frequency of alternating current, which generates a certain current in the secondary coil through electromagnetic induction, thereby transferring energy from the transmitting end to the receiving end. At present, the most common charging solution uses electromagnetic induction. In fact, the electromagnetic induction solution is not mysterious in terms of technology implementation. BYD applied for the non-contact inductive charger patent in 2005, and used electromagnetic induction technology.
Magnetic field resonance charging consists of an energy transmitting device and an energy receiving device. When two devices are adjusted to the same frequency or resonate at a specific frequency, they can exchange energy with each other, which is a technology currently under study. A research team at the Massachusetts Institute of Technology (MIT) recently used the technology to light a 60-watt bulb two meters away and named it WiTricity.
Radio wave charging This is a relatively mature technology. It is similar to the early use of ore radio. It is mainly composed of a microwave transmitting device and a microwave receiving device. It can capture the radio wave energy rebounded from the wall and adjust it with the load. Maintain a stable DC voltage. This method requires only one transmitter mounted on the wall plug and a “mosquito” receiver that can be mounted on any low voltage product.