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Power Week-in-Review: Self-Healing Battery, Personal Hydroelectric Generator & Li-ion Forecast

11/27/2013 11:45 AM EST
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Robotics Developer
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Re:
Robotics Developer   12/2/2013 8:58:07 AM
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AZskibum, while I like the idea of being able to recharge my cell phone or other batteries while on a hike I am not sure that it is practical.  Given the nature of much of the terrain here in the North East, there is not a lot of water available for this type of charger and the time needed to charge is too long - consider standing around for 2 hours waiting; can't leave the phone and charger. Tthe location may be a nice one but only if you are camping out (say for the night) would this make sense.  The additional weight is also a concern, traveling lighter is always better.  If I had a vote I would be looking for either a flexible solar blanket that can charge as I go or a hand cranked generator to provide recharge power.  The other option would be to take advantage of the nature of hiking: using the energy that walking generates to trickle charge your devices.

rich.pell
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Re: self-healing?
rich.pell   12/2/2013 2:32:35 PM
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"The fact that these researchers were able to get 100 charging cycles out of this battery is a huge improvement."

The SLAC article mentions that the ultimate charge/discharge cycle goals are about 500 cycles for cell phones and 3,000 cycles for EVs, so there's still plenty of ground to be made up.



rich.pell
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rich.pell   12/2/2013 2:38:43 PM
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"The other option would be to take advantage of the nature of hiking: using the energy that walking generates to trickle charge your devices."

Yes, and there are devices being developed for that purpose.  For example, like the recently funded Kickstarter project SolePower: Power by Walking.



rich.pell
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rich.pell   12/2/2013 2:44:08 PM
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"How much flow of water is needed for the turbine to function properly?"

According to the Hydrobee site, "Flow of only one gallon per minute will charge the battery. Water flowing at a fast walking speed (about 4 mph) has enough energy to charge the 6 AA batteries in the Hydrobee can in about 2 hours."

MeasurementBlues
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Re:
MeasurementBlues   12/2/2013 4:17:55 PM
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Georgia Tech has a research project on the subject.

Search for "Nanoscale Triboelectric-Effect-
Enabled Energy Conversion for Sustainably Powering Portable Electronics" and you'll find plenty of links to this paper.

MeasurementBlues
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MeasurementBlues   12/2/2013 4:21:02 PM
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@Robotics Developer, maybe you need a small wheel connected to a generator that you can place in a running stream. The electricity from the motion could charge your phone.

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