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And the best part is...And the best part is...Posted Oct 8, 2007 22:02 UTC (Mon) by dlang (✭ supporter ✭, #313)In reply to: And the best part is... by salimma Parent article: Laptop With a Mission Widens Its Audience (The New York Times)
actually, the battery in your laptop runs far above ambiant temperature where the reaction is taking place, the heat then spreads across the rest of the battery to be dissipated. the problem with laptops getting hot is not just the heat from the CPU, it's also the heat from the battery.
the 'exploding' laptops that have been hitting the news are where the batteries have not been able to dissipate their heat properly and ht heat has built up excessively. this new battery technology avoids this heat and so should not have this sort of problem
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It's even better than that. Posted Oct 22, 2007 15:23 UTC (Mon) by hazelsct (guest, #3659) [Link] Lithium iron phosphate does not have any thermal runaway problems at all, so you can short the battery and drive a nail through it while it's discharging at maximum rate and it won't explode. (Don't try that with a traditional lithium cobalt/manganese oxide battery, unless you're trying to kill yourself!) Furthermore, it has higher power density, so you can safely get a lot more current out of these cells than traditional batteries, and charge them faster. That's something OLPC doesn't use, but the Prius plug-in conversion kits love it, because you can grab almost all of the braking energy even in panic stops, and accelerate quickly. The downside is that it has lower energy per unit mass and per unit volume than traditional lithium batteries, hence the "won't last long in a normal laptop" comment. Oh -- and the OLPC people don't hold the patent on this chemistry, that's held at the University of Texas (though don't tell A123 people that). OLPC may have patents on some of the surrounding technology in the laptop, I don't know.
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