Knowledge

The next generation wireless charging standard, finally achieved wireless



Now, the devices that support wireless charging are becoming more and more common, including Nokia's Lumia parts, Nexus 4 and so on. All kinds of upcoming new phones will be expected to be equipped with wireless charging function.


The advantages of wireless charging are obvious: get rid of the headaches of the charging line, cleaner, no more power jacks on the device, avoid oxidation or ash; theoretically, a charger seat can support multiple devices.


In fact, the industry does not have a universally adopted standard, which brings difficulties to the popularization of wireless charging. The Wireless Charge Alliance (WPC) 's Qi is currently the most influential standard, it now has more than 200 cooperative manufacturers, operators.


But there are problems with the standard of Qi. The technology it supports is actually called "inductive charging", and the device needs physical contact with the charging seat. And according to the general understanding of "wireless", it should not need physical contact.


Fortunately, Qi's latest version of the 1.2 charging technology adds some new features, including a real "wireless" charge, which can be recharged in 1.77 inches (45 millimeters) from the charger seat.


The new standard also allows a pair of extra charge to support up to 2000 watts of high-power equipment, such as kitchen utensils. And the previous standard can only be one-to-one.


This new standard offers many new possibilities. If the merchant can install the charge seat in the shop, the user can charge in the vicinity, has the good effect to increase the user stickiness. In a car, you don't have to charge in a certain place if you install a charger seat.


Rival rezence and power matters have launched the "resonant charging" standard, but WPC says the energy conversion efficiency of Qi is higher. This new version is still in the test, the final market conversion rate will reach percent.


In fact, if the charge efficiency, wireless charging than wired charge. In other words, it takes more time to charge wirelessly. But the point of wireless charging is to make the most of the scattered time. You do not have to find a line to plug in the interface, do not use the cell phone, it is tantamount to charging it, do not have to "find a special time to recharge." The use of this method is reasonable and rational, as long as you are not outdoors for a long time.