Hasta La Gadget!

One of the last times we saw the concept of a self-recharging battery, it was part of a high-minded Nokia patent whose ideas still haven’t seen the light of day. Researchers at Georgia Tech are more inclined to put theory into practice. Starting from a regular lithium-ion coin battery, the team has replaced the usual divider between electrodes with a polyvinylidene difluoride film whose piezoelectric nature produces a charging action inside that gap through just a little pressure, with no outside voltage required to make the magic happen. The developers have even thumbed their noses at skeptics by very literally walking the walk — slipping the test battery under a shoe sole gives it a proper dose of energy with every footstep. At this stage, the challenge mostly involves ramping up the maximum power through upgrades such as more squeezable piezoelectrics. Georgia Tech hasn’t progressed so far as to have production plans in mind; it’s nonetheless close enough that we could see future forms of wearable computing that rarely need an electrical pick-me-up.

Filed under: Wearables, Science

Georgia Tech develops self-charging battery that marches to the owner’s beat originally appeared on Engadget on Sun, 19 Aug 2012 04:28:00 EDT. Please see our terms for use of feeds.

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Anyone who’s had to recharge an EV — or, for that matter, any mobile device with a very big battery — knows the pain of waiting for hours while a lithium-ion pack tops up. South Korea’s Ulsan National Institute of Science and Technology has developed a conduction technique that could cut that charging time down to less than a minute. By dousing the nanoparticle materials of the battery in a graphite solution that’s then carbonized, the researchers make a web of conductors that all start charging at once; current batteries have to charge towards the center slowly, like a not-very-edible Tootsie Pop. The immediate goal is to develop a secondary battery for an EV that could provide extra mileage in a matter of seconds. Here’s hoping that the Ulsan team’s fast-charging battery is more viable than others and spreads to just about everything — we’d love to have EVs and laptops alike that power up in as much time as it takes to fill a traditional car at the pump.

[Image credit: iFixit]

Filed under: Transportation, Science

Korean carbon-coated lithium-ion battery could cut recharge times down to minutes originally appeared on Engadget on Wed, 15 Aug 2012 19:31:00 EDT. Please see our terms for use of feeds.

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Fisker Automotive can’t seem to catch break — because its Karma hybrid EV sedan has yet again become too hot. Similar to an incident last spring that left a model burnt to near smithereens and damaged its owner’s house, the Karma above caught fire in a Woodside, CA parking lot while powered off. Jalopnik was the first to get word of the incident, noting that the damage remained reserved to the front left of the vehicle, near where an exhaust is located. As the story goes, the owner found the vehicle emitting smoke after returning from a grocery run, prompting a call to Fisker and then the local fire department, which arrived as it was already engulfed in flames. In a statement to Wired’s Autopia, Fisker has been vehement to note that the damage appears to be far from where the car’s battery and sensitive electrical components are located, and that it wasn’t plugged in for a charge — furthermore, it’s already had correspondence with the owner and is actively investigating the matter with plans to issue an update when there are findings to share.

All that said, it remains to be seen whether the Karma’s battery system, supplied by A123 Systems (and the focus of previous recalls), had any role in igniting the car. Thankfully there were no reports of injuries from the incident, but as you can tell from the photo, the car was essentially totaled. You’ll find a video of the Karma in flames being quelled by firefighters after the break, along with the official statement by Fisker given to Autopia.

Continue reading Fisker Karma owner returns from grocery run to find hybrid EV on fire

Filed under: Transportation

Fisker Karma owner returns from grocery run to find hybrid EV on fire originally appeared on Engadget on Sun, 12 Aug 2012 05:44:00 EDT. Please see our terms for use of feeds.

Permalink Wired Autopia  |  woody77atgmail (YouTube), Jalopnik  | Email this | Comments