Showing posts with label charge. Show all posts

2009-07-25

Witricity Wireless Power

Clipped from: BBC NEWS | Technology | Wireless power system shown off

Wireless power system shown off

A system that can deliver power to devices without the need for wires has been shown off at a hi-tech conference.
The technique exploits simple physics and can be used to charge a range of electronic devices over many metres.
Eric Giler, chief executive of US firm Witricity, showed mobile phones and televisions charging wirelessly at the TED Global conference in Oxford.

Clipped from: WiTricity Corp. Home — Wireless Electricity Delivered Over Distance

Imagine a future in which wireless electricity makes everyday products more convenient, reliable, and environmentally friendly.

WiTricity Corp.’s vision is to develop a family of wireless electric power components that will enable OEM’s in a broad range of industries and applications to make their products truly “wireless.” Wireless electric power delivered over room scale distances, and with high efficiency. Wireless electric power that is safe for people and animals. Wireless electric power—imagine no more… it’s here!

WiTricity Technology: The Basics

WiTricity Prototype System

This WiTricity prototype system demonstrates wireless powering of an LCD TV. In this demonstration system, a WiTricity power source is positioned on the floor. It is connected to AC power and converts AC current to an oscillating magnetic field. The WiTricity capture device (to the right of the LCD TV), converts the magnetic energy to alternating current and powers the LCD TV. The WiTricity power source and capture devices are highly resonant magnetic systems that can exchange energy in a very efficient manner. WiTricity Corp. is miniaturizing and packaging the technology so that it can be built directly into a wide variety of products and systems—with no need for an external power capture device as shown in this prototype configuration.

Clipped from: WiTricity Corp. — Applications of WiTricity Technology

WiTricity Applications

Consumer Electronics

Industrial

Transportation

Other Applications

Clipped from: YouTube - Witricity

Sources:

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2009-06-15

Ambient Power for Cell Phones

Clipped from: Nokia developing phone that recharges itself without mains electricity | Environment | guardian.co.uk

Nokia developing phone that recharges itself without mains electricity

Prototype harvests radiowaves from TV, radio and other mobiles

Standby mode is often accused of being the scourge of the planet, insidiously draining resources while offering little benefit other than a small red light and extra convenience for couch potatos. But now Nokia reckons a mobile phone that is always left in standby mode could be just what the environment needs.

Clipped from: Technology Review: Wireless Power Harvesting for Cell Phones

Wireless Power Harvesting for Cell Phones

Nokia hopes to create a device that could harvest enough power to keep a cell phone topped up.

A cell phone that never needs recharging might sound too good to be true, but Nokia says it's developing technology that could draw enough power from ambient radio waves to keep a cell-phone handset topped up.

Ambient electromagnetic radiation--emitted from Wi-Fi transmitters, cell-phone antennas, TV masts, and other sources--could be converted into enough electrical current to keep a battery topped up, says Markku Rouvala, a researcher from the Nokia Research Centre, in Cambridge, U.K.

Clipped from: NRC Cambridge UK laboratory | Nokia Research Center

NRC Cambridge UK laboratory develops nanotechnologies for mobile communication and ambient intelligence. Studying physical, chemical and biological phenomena and manipulation of matter at the nanoscale enables generation of knowledge for enhancing human capabilities.

Scope of Nokia nanoscience and nanotechnology research.

Clipped from: Nano Devices, Cambridge UK | Nokia Research Center

Home > Research > Laboratories > NRC Cambridge UK laboratory > Nano Devices, Cambridge UK

Research topics

[...]

Enhanced energy and power capacity in mobile devices: As mobile devices become ever more capable and thus power-hungry, one key issue becomes increasingly important: the storage and efficient use of energy. In practical terms, this translates as the development of energy storage media that are able to provide more energy, both more quickly (for responsive operation) and for longer (less recharging needed) whilst occupying a smaller space. In addition, what if such devices could also harvest their own power without needing mains recharging? Here too, nanotechnology has an enabling role to play; electrodes incorporating nanostructures can to be fabricated with hugely-enhanced surface areas providing significantly increased charge-storing capacity. In this project, the University of Cambridge's great strength in novel nanomaterial synthesis, and their previous work developing polymer-carbon nanotube composites with controlled conduction is used to fabricate and test nanotube-enhanced supercapacitors and nanocomposite solar cells - all essential ingredients in a coherent approach to improved energy handling.

Sources:

Nokia developing phone that recharges itself without mains electricity | Environment | guardian.co.uk

Technology Review: Wireless Power Harvesting for Cell Phones

NRC Cambridge UK laboratory | Nokia Research Center

Nano Devices, Cambridge UK | Nokia Research Center

Related:

Inhabitat » Nokia Phone Charges by Drawing Energy Out of Thin Air

Nokia trying to charge mobiles with radio waves | // Pocket Picks //

Ambient power | Nokia Conversations

2009-03-28

Nanogenerators to Charge Gadgets

Clipped from: YouTube - Power shirt reported by Fox News

Power shirt reported by Fox News

Clipped from: New nanogenerator may charge iPods and cell phones with a wave of the hand (3/28/2009)

New nanogenerator may charge iPods and cell phones with a wave of the hand

Imagine if all you had to do to charge your iPod or your BlackBerry was to wave your hand, or stretch your arm, or take a walk? You could say goodbye to batteries and never have to plug those devices into a power source again.

In research presented here today at the American Chemical Society's 237th National Meeting, scientists from Georgia describe technology that converts mechanical energy from body movements or even the flow of blood in the body into electric energy that can be used to power a broad range of electronic devices without using batteries.

Pictured is a schematic illustration shows the microfiber-nanowire hybrid nanogenerator, which is the basis of using fabrics for generating electricity. - Professor. Z. L. Wang and Dr. X. D. Wang, Georgia Institute of Technology.

Clipped from: The next not-so-big thing: Nanogenerators: Scientific American Blog

The next not-so-big thing: Nanogenerators

Wang's nanogenerator consists of an array of vertically aligned zinc oxide nanowires (each about one micron long) standing about a half-micron apart on a flat piece of gallium arsenide, sapphire or a flexible polymer substrate. On top of that nanowire forest, Wang and his colleagues lowered a tiny plate containing thousands of silicon electrodes until they were touching the tips of the nanowires (sandwiching these wires between the substrate and the electrode plate). When the plate—which is wavy like a piece of corrugated cardboard—is pressed down on the wires, this flexing produces small electrical charges. "The elastic bending of the zinc oxide nanowires is a major advantage," Wang says. Carbon nanotubes, for example, are much less flexible.

Clipped from: Zhong Lin (ZL) Wang's Nanoscience and Nanotechnology group

Research Highlights

Nanogenerator made by Z.L. Wang and Jinhui Song.

read the paper

Clipped from: YouTube - Hamster driven nanogenerator

Clipped from: YouTube - Human finger driven nanogenerator

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