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People have considered this, but we are talking 500 kg packs worth many thousands of euros, at this moment. That also means that engineers need to able to put that weight at a good point for driving characteristics, not necessarily the most accessible point for changing. With smaller and cheaper packs it might become a possibility, but that is going to take some serious time.
by GreatZamfir on Sat Dec 20th, 2008 at 12:30:34 PM EST
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Why can't you have a couple dozen packs the size of an ordinary car battery?

Most economists teach a theoretical framework that has been shown to be fundamentally useless. -- James K. Galbraith
by Migeru (migeru at eurotrib dot com) on Sat Dec 20th, 2008 at 12:45:30 PM EST
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I suppse you can, but swapping a couple of dozen of batteries all over the car is not exactly the easy way of recharging, and swapping just a few will not increase your travel distance by a lot. And not that with two dozen batteries, we are still talking 20 kg batteries. That's not a weight everybody can lift with ease, think old ladies.

Form factor is another challenge. You could probably design a car where a large battery pack can taken out of the car by a special machine. But can you expect that every model by other car builders will use that same priciple? Especially as there is still a lot of progress in this area, so if you build an infrastructure of charging stations specialized for a particular design and technology, it might be obsolete in 5 years or so.

by GreatZamfir on Sun Dec 21st, 2008 at 04:14:28 AM EST
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