Research Status Of Wireless Chargers，What does the future of wireless charging technology look like?
Wireless charging breaks the way that electric energy transmission can only rely on direct contact transmission of wires. It belongs to non-contact transmission and can avoid contact sparks, sliding wear, and explosive electric shocks that may be caused by contact electric energy transmission. There are three main ways of wireless power transmission: electromagnetic induction, electromagnetic resonance and electromagnetic radiation. Electromagnetic induction is currently the most commonly used wireless power transmission method. Its technology has been mass-produced, and its production cost is lower than other technologies, and it has passed safety and market verification. Currently, there are three major alliances dedicated to the development and standard formulation of wireless charging technology. These three alliances are Alliance for Wireless Power (A4WP), Power Matters Alliance (PAM) and Wireless Power Consortium (WPC). The Qi standard is the “wireless charging” standard launched by WPC, which uses the most mainstream electromagnetic induction charging technology. The Qi standard mainly targets portable electronic products such as cameras, video and music players, toys, personal care and mobile phones. At present, the research and design of low-power wireless chargers are mainly for mobile phone wireless charging, using TI’s BQ500211 dedicated chip, and some low-power terminals also use dedicated integrated chips, which are developed in the initial stage using dedicated integrated chips. It can save development time, but it is not conducive to cost reduction and later expansion and upgrade in the long run.
Although wireless charging technology has been developed to a certain extent, there are still some difficult technical problems in the development process. First, the charging efficiency is not high. Once the distance is a little farther, the efficiency of charging will decrease sharply, and a lot of time and resources need to be wasted to complete the charging, so it is of little use. Second, safety issues during the charging process. High-power wireless charging equipment will generate a large amount of electromagnetic radiation, which will cause certain adverse effects on health, and will also have interference effects on aircraft and communications. The third aspect is practicality. The current wireless charging technology can only be achieved by fixing it at a certain fixed point, which is inconvenient and therefore not practical. Fourth, the price is expensive. Since wireless charging technology is still in the preliminary stage of research and application, the cost of research is relatively high, so the price of the products developed by it is relatively high.What does the future of wireless charging technology look like?