Xiaomi released the air charging technology and took the lead in implementing it on Xiaomi 11. What exactly is air charging? Really like a science fiction movie? Is the radiation big? Will it waste electricity or be stolen by the neighbor next door?
Space charging, support multi-device charging within a few meters
According to Xiaomi's introduction, the core of Xiaomi's air-to-air charging technology lies in space positioning and air-to-air energy transmission. Its air-to-air charging pile has built-in 5 phase interference antennas, which can position the mobile phone in millisecond space and accurately detect the location of the mobile phone.
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| Xiaomi released the air charging technology. Image source: Xiaomi Group |
"The phase control array composed of 144 antennas transmits millimeter waves to the mobile phone through beamforming. At present, Xiaomi's space charging technology has achieved 5 watts of long-distance charging for a single device within a radius of several meters."
In the application scenario, multiple devices can also be charged at the same time (each device supports 5 watts), and even the blocking of foreign objects does not reduce the charging efficiency. "Whether the mobile phone is held in the pocket or in the hand, it can automatically charge in the air, freeing the charging from the shackles of the wire and the charging base and entering the true wireless era."
It is worth noting that according to many media reports, Samsung has also applied for a technology patent similar to air charging, but has not released related products in the future; Huawei is also developing similar wireless charging technology; some companies in the United States and PanasonicOther companies currently have related wireless charging research projects.
On April 1, 2020, OPPO officially released the "April Fools' Day" video WeiboIt is said that OPPO Ace infinity is equipped with the world's first FreeVOOC charging technology, which can achieve a stable charging power of 5-10W within 10 meters. Finally, OPPO said that the video is purely fictitious, but it is absolutely possible.
Netizens are discussing hotly, and many questions need to be solved
The reporter noticed that after the announcement of Xiaomi's air charging news, it caused heated discussions among netizens. The topic that netizens care about most is: Is it harmful to the human body? Will the radiation be particularly large?
Some netizens worry that electricity will be stolen or waste electricity. "Does air charging require a password? Will it is popularized in the future, will neighbors rub my home's electricity?" "Will there be applications like the 'WiFi Master Key' to rub electricity?"
Some netizens even ridiculed the charging efficiency of 5 watts of charging in the air, "Good guys, and AppleCEO Cook said the same, Five Fortune and One An (5V1A) is indeed the future. "In this way, the bonus data cable can be canceled in a fair manner. "
After Apple announced the cancellation of the original chargers on the iPhone 12 series products, Xiaomi also announced the cancellation of the aforementioned bonuses in Xiaomi 11.
However, there are also netizens who are looking forward to charging in the air, "You will no longer need to connect to the data cable to charge the game in the future. You can charge the phone while playing the game. It's cool." "Don't be afraid of forgetting to charge the phone." When it is mature and used in electric vehicles, can it be charged while running?"
Expert: It is wireless charging, there will definitely be radiation
Regarding the launch of air charging, communications industry expert Xiang Ligang said in an interview with a reporter from Chinanews.com that it is actually wireless charging, and more power will definitely cause radiation.
“Radio waves are emitted through charging piles at a longer distance. In the home environment, people are exposed to radio radiation. To ensure the charging speed, the power must be increased, which may have a greater impact on the body. This doubt is not easy to eliminate ."
As for whether the electricity will be stolen by the neighbors next door, Xiang Ligang believes that it is impossible, because there are walls, and penetration will definitely not work.
Xiang Ligang also said that charging in the air has a large loss due to the long distance. "Wireless charging has a much higher loss than wired charging. This loss has reached 30%. If you charge a long distance, there will be a greater loss. More energy will be wasted."
Zhang Jialiang, the chief scientist of OPPO VOOC flash charging, once said that air charging is a yearning for future charging technology. Take the above-mentioned fictitious video released by OPPO as an example. The feature is: it is an active charging technology, which first locates the phone and then charges. If the phone does not move, it will be locked and the power will gradually increase to achieve faster charging; once the access is interrupted, It will rescan.
Xiang Ligang also put forward new problems that may arise from air charging, "If more of these wireless charging devices are deployed at home, will they cause interference to other radio equipment? This also requires attention."
Regarding issues such as air charging radiation and whether electricity will be stolen, the reporter contacted Xiaomi, and the other party responded that because it is still in the pre-research stage, the details are not convenient to disclose, "but it is certain that it will be safe when commercialized."
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