Qi Wireless Charging Technologies Review

The cord is tied not to be found or the available cable connector does not fit: users of smartphones suffer round-about battery charging. More pleasing sound prospects for wireless to charge batteries.

In the autumn 2015 Google introduces 5 X the Smartphone nexus, which produced the South Korean manufacturer of LG Electronics, who previously had announced the implementation of the so-called Qi technology in the nexus 5 X. For several years, a consortium of manufacturers working on this Qi technology. Qi is the Chinese word for energy, more specifically”life energy. She should allow to load, so wireless batteries of smartphones, tablets and other electronics devices via Electromagnetic induction with electricity. This means that the user sets his qi device on a suitable charging station, which is connected to the mains. The energy to the battery of the Smartphones flows by means of a radiating coupling of charging station and power receiving device. Usually the current refueling takes at least as long as in conventional ways with a cable, but the advantages are obvious: A cable is not needed, cable connections on the device are not book up from, and you can drop simultaneously multiple devices without performance degradation on a charging station. IKEA can do it already, as have been already presented.

That sounds too good to be true, and in fact:

At the appearance of the nexus 5 X Google had to admit that the Qi method has been deleted and LG Electronics instead built a USB-C connector, which is to allow charging of the battery within ten minutes. Unfortunately, the USB-C standard has become, so technically he has may be barely enforced. Have you misplaced your USB cable, you might get immense problems to find a suitable cable for your Smartphone.


The technique is over 100 years old


Such setbacks in the wireless battery charge change nothing, that the Qi technology slowly prevails among electronics manufacturers. Already in the 1880s years (!) of the American physicist and inventor Nikola experimented Tesla induction motor, with which he tried to transmit energy wirelessly. Wired energy transfers were at that time but more effective, so that took place for over one hundred years no significant improvements of wireless induction technology. Since the turn of the century, researchers used increasingly line Active materials and raised over 200 kilohertz to the transmission frequency so that power from the air tanks about the voluminous battery of Samsung Galaxy S5 within a maximum five hours a full load wirelessly.


Toothbrushes and hand blender to work wirelessly


Also the electronics giant Samsung belongs to the Qi Consortium as well-known manufacturers. In addition, especially the automobile industry uses Wireless charging technology and about to accommodate Chargers in the road surface to fuel electric cars while driving. The technique can be used also in the budget, about bar mixers or electrical toothbrushes, where qi is used now as standard. The worry about the released radiation is probably unfounded. Measurements by scientists showed that they observed no negative consequences of radiation so far.

Cordless battery

The devices to be charged need not to lie in the immediate vicinity of the charging station, which proves the US manufacturer of energous with its called Watts up technique where power receiver and power stations may be loose a few meters away from each other. The biggest benefit for Wireless charging is that there are only a few standards. In addition to Qi, there are only PMA/A4WP as a serious competitor so that it can fuel all Qi smartphones, Handblender or nose hair trimmer, for example, with a Qi compatible charger with a low power consumption of 5 to 10 Watts. May all consortia join together in the next few years, which in the medium term could be a good reason to kill the cable clutter. There are already a lot of smartphones, the Qi support and help to popularize the technique and to usher in a slow departure from the cable tangle.