Portable non contact charger for mobile device
We know how the charger work. Using its wire, connect the electrical cord to the phone. But, can we imagine if there is no electrical cord that as power source? Such a have-own-power charger? People in Seiko Epson Corp and Murata Manufacturing Co Ltd has created prototype of a portabe non-contact charger for mobile devices. They are show it to public at Embedded Technology 2008 in Yokohama, Japan.
The idea lies on a built-in Li-ion ion secondary battery. With this power source, the prototype can charge mobile devices even when no power outlet available. It consists of a non-contact charging module developed by Seiko Epson and Murata’s quick-charging Li-ion secondary battery.
Here is the technical thing:
The prototype has a structure where a Li-ion secondary battery with a capacity of about 2000mAh is sandwiched by two types of modules, the “AT150″ and the “AT25″ manufactured by Seiko Epson. The former is used as a 15W power receiving module, while the latter is used as a 2.5W power transmitting module.
The Li-ion secondary battery of the prototype charger is charged in a non-contact manner on a charging table by using the AT150. And a mobile device is charged by using the AT25 at 2.5W. Both the AT150 and the AT25 have a power transmission efficiency of 70%, according to Seiko Epson.
AT25 will be started for shipping, while the manufacturers has not decided yet about the mass production schedule of the AT150.
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