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http://www.theregister.co.uk/2003/06/19/battery_makers_to_tr y_splash/
Imagine charging your PDA, phone and notebook all at the same time, from the same source, simultaneously. That's the goal of SplashPower, a UK-based start-up that has developed a 'wireless' recharging system.
This week the company announced a deal with Hong Kong-based battery maker Celltronix to explore how its technology can be incorporated into power packs. It recently signed a similar evaluation deal with Korean battery specialist, Hanrim Postech, which supplies the likes of Samsung and LG.
Both battery builders will incorporate SplashPower's SplashModules into their products. SplashModule is a receiver that's less than a millimeter thick that connects to the battery's recharge terminals. When a SplashModule-equipped battery or device is placed over a SplashPad, a mouse-mat sized, 6mm-thick unit, it picks up power wirelessly and recharges. There's no electrical contact, and you don't even have to put the device on the pad.
SplashPower's system uses a technique called inductive power transfer. Essentially, a high-frequency oscillating electromagnetic field in the Pad generates a current in the Module's receiver. It's broadly the same way a power transformer works, with a primary coil generating a current in a secondary coil, the difference between the number of loops in each coil governing the change to the voltage. The SplashPad needs to operate at a much higher frequency that a typical transformer in order to bridge the air-filled gap between its equivalent of the two coils.
In addition to saving all that hassle with wires, SplashPower allows multiple devices to be charged on the same Pad, at the same time.
SplashPower expects the first consumer products based on the technology to appear by the end of the year. ®
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http://www.theregister.co.uk/2003/06/19/microengines_to_powe r_nextgen_pdas/
Micro-engines to power next-gen PDAs, PCs, phones
Published Thursday 19th June 2003 14:33 GMT
Forget about fuel cells: 'micro-engines' are the
future of mobile device power supplies, if the predictions of a team of
scientists at the UK's University of Birmingham come to pass.
A
research team from the University's Mechanical Engineering department
lead by Dr Kyle Jiang have developed a motor just a few millimetres in
size that can nevertheless generate more than 300 times as much energy
as an ordinary battery.
The engines (left) could be used to charge mobile phones and
notebook PC batteries in just a few seconds, the team believe,
eliminating the need to leave them hooked up to the mains.
"These micro-engines will be much more energy efficient than
standard batteries," said Jiang. "It takes 2000 times more energy to
manufacture a battery than the battery dispenses while it is being
used. Soon everyone will be able to charge their mobile phones
instantly using a shot of cigarette lighter fuel instead of having to
find a socket for a charger and wait while the phone charges up."
Ultimately, mobile devices like PDAs could even be fitted with their own micro-engines, fueled from a built-in tank.
"We all have to slot in our AA batteries which require changing and
manufacturing," said team member Dr Michael Ward, a senior lecturer at
the UoB. "Much better if we could use hydrocarbon energy directly so
that we could use these little engines to give us electricity directly,
without having to go through the battery cycle." ®
Power to the people!
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