But now researchers think that a little heat at the right time could actually be used to extend the lifespan of a battery. During the cycles of charing and discharging, li-on batteries slowly degrade. One factor involved in that degradation is the growth of small fibers of the lithium anodes, referred to as dendrites, that spread into the electrolyte. As they grow they can spread from one electrode to the other, allowing current to pass through them in turn causing a short circuit that either writes them off or causes them to catch fire. And even if that doesnt happen, they can cut off parts of the electrodes, reducing the capacity of the battery. But researchers from the California Institute of Technology have been exploring how heightened temperatures can be used to break down those dendrites. Theyve found that careful, controlled heating of li-on batteries at temperatures of up to 55C can actually shorten the dendrites by as much as 36 percent. The researchers have investigated how the process works, and found that the temperature rises cause the atoms in the lithium dendrites to re-order into a more compact form. So its not that they get smaller in volume terms, but their reach shortens which is enough to alleviate battery headaches.
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Who could have foretold that the gyroscopes found inside a mobile phone (they ensure that the picture is always the right way up) could spawn such an awesome device as the self balancing scooter. With a top speed around 7 mph and a range of up to 12 miles these new electric scooters are definitely this year’s “must have” gift. Originally only seen being used by celebs and sporting heroes on social media sites, they have now come down to a price that is attainable by the man in the street. They really are a lot of fun !.
To see which one is best, read the full story (including some of the amazing claims made by some of the suppliers) and buy a self balancing skateboard on self balancing drifting board.
Hoverboards at Wal-Mart – Business Insider
If we still stand by with nothing to do, we are deemed to perish. In doing this, every one of us living this globe is obliged to do within his ability. To realise the green commuting, the electric self-balancing scooter V9 by FOSJOAS comes as a ray of hope to us. It is worth a careful thought. FOSJOAS intelligent self-balancing scooter V9 is propelled body movement of the rider under the built-in gyroscope system. By leaning forth, march and by leaning back, retreat. Come to a halt as long as you stand upright on the standing board. V9 is powered by a potent lithium core battery. On a full charge, FOSJOAS V9 has a range of 45 km.
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