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Xiaomi today unveiled its “Mi Air Charge technology”, which is able to wirelessly charge devices from a room with 5W of power.
Mi Air Charge technology offers a “true wireless charging” solution, without cables or stands. The devices charge remotely with 5W of power, using advanced spatial positioning and beamforming energy transmission.
Xiaomi has developed an isolated charging stack unit with five phase interference antennas, which can accurately detect the location of a smartphone. A phase control network with 144 antennas then transmits millimeter waves directly to the phone via beamforming.
For smartphones, Xiaomi has developed a corresponding miniaturized antenna array with a “beacon antenna” and a “receiving antenna array”. The beacon antenna broadcasts low-power position information, while the receiving antenna array uses 14 antennas to convert the millimeter wave signal emitted by the charging stack directly into electrical energy through a rectifier circuit.
Remote charging technology is capable of charging multiple devices within a radius of several meters, with each device capable of receiving 5W of power. Xiaomi also notes that physical objects placed between the charging stack and the device do not reduce the efficiency of charging.
Xiaomi says it wants to expand the technology to smartwatches, bracelets and other wearable devices, as well as smart home speakers, desk lamps and more in the future. It’s unclear how close Xiaomi is to bringing its Mi Air Charge technology and charging battery to the mainstream market, but today’s reveal may suggest it’s as soon as possible.
The announcement indicates that the advancements in remote wireless charging technology within the industry are growing steadily. Several years ago, Apple reportedly partnered with Energous to provide its own remote wireless charging solution. Apple is still believed to be looking for new wireless charging technologies, and with the advent of MagSafe on iPhone 12 models, the company is clearly showing interest in new ways to power devices.
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