Batteries: Still a big problem for plug-ins and electrics

No more loose laptop batteries allowed on airlines?

Earlier this week another lithium-ion battery in a laptop computer burst into flames, and a string of lithium problems have made US transportation authorities take notice. As a a result, loose lithium-ion batteries will not be allowed in checked luggage according to a very interesting article in the Wall Street Journal.

And, if the safety of lithium-ion batteries for computers and cell phones cannot be guaranteed, can it be guaranteed in plug-in hybrids and electric vehicles? Such problems forced Toyota, for example, to delay lithium powered hybrids until at least 2010 or 2011.

"For all the hoopla, nobody yet has figured out how to make a small enough battery that will hold a big enough charge for these new cars -- and not be a risk to burst into flames," states WSJ.

While there a host of small battery makers that have claimed to solve these problems, other battery developers have serious doubts.

"It doesn't matter how far ahead you are in research and development" because all lithium-ion batteries are prone to overheating, no matter what chemistries you use, contends Mitsuru Homma, Sanyo's top battery executive . "Clever design can minimize the chances for overheating. But if you don't have fool-proof manufacturing know-how, you won't be able to guarantee 100% the safety of a battery cell, no matter how safe it may be proven in the lab."