Muito interessante isto aqui.
Xiaomi introduces Mi Air Charge, wireless charging from across the room
Xiaomi introduced Mi Air Charge technology this Friday morning. According to the company “remote charging technology” can charge multiple devices simultaneously and will recharge a smartphone that’s being used, “while walking around or even when something’s in the way”.
The company outlines how the technology works in a blog post. The transmitter looks quite large, as large as perhaps a living room side-table next to a couch. The transmitter can provide a 5W charge wirelessly to a smartphone.
This kind of charging has nothing to do with the Qi standard. The smartphones need to be outfitted with a “miniaturized antenna array with built-in ‘beacon antenna’ and ‘receiving antenna array’.” The smartphone has 14 antennas to convert a millimeter wave signal that’s emitted by the charging pile. The signal is converted into electric energy through a rectifier circuit.
In its current state, Xiaomi’s remote charging technology can charge multiple devices with a 5W current within a radius of “several meters”. Xiaomi claims that physical objects don’t reduce the charging efficiency, but this must have some caveats.
Xiaomi teases that its Mi Air Charge tech would be eventually compatible with smartwatches, fitness bands, and other wearables.
No release date is offered for the Mi Air Charge system and it’s not known if such technology would ever make it to the consumer market. One thing we know for sure – it’s going to be expensive whenever it does arrive. It’s interesting to see innovations like this and we’re excited for the future of wireless charging technology.
Source
Lembra-me um pouco aquelas visões futuristas de Tesla
ps: a Lenovo/Motorola também está desenvolvendo algo
Motorola also demonstrates its own long-distance wireless charging
Motorola has introduced its understanding of how devices should charge wirelessly from a distance, just after Xiaomi
introduced Mi Air Charge. The technology of the Lenovo subsidiary can charge from a one meter distance, provided nothing stands in the way between the charger and the device.
According to the official video, two Motorola Edge phones (likely modified for the test) are placed in a standing position 80cm and 100cm away from the charger, respectively. They immediately start to fill up the battery, but once a person places his hand on the charger, the process stops.
Here’s the video:
The charger apparently is called Motorola One Hyper and while the technology is based on the Qi standard, the company said it is actually better. There could be seven phones, charged simultaneously, but Motorola does not give any actual numbers such as the charging rate of the device and whether all phones can have the same speed or they share the charging capacity.
Motorola also claimed this is “the right way to do wireless charging” and while it might sound like a dig to Xiaomi, it is more likely the company wants the industry to move forward from the need to have the phone constantly sitting on a charger.
Source (in Chinese) |
Via