On 08/28/2014 11:16 AM, Michael Ross via EV wrote:
Hi Ed,
I agree with your logistical work up. It makes sense. But...
" can simply have the pack swapped"
This jumps out at me as a stretch. You are talking about putting in 140%
more battery pack to get to 60kWh At the very least, you would have to buy
a car with 140% more space in it for batteries than it needs most of the
time, and the effects on handling can't be negligible. If it was trunk
space, then when making a long trip you would reduce your carrying
capacity significantly. No car designer would look at this as "simply."
You may have a conversion mindset. A well designed purpose built EV can
easily accommodate a range of battery sizes. Witness the Tesla S,
originally offered with three sizes. 40-85kwh. And I doubt there was
much difference in the center of gravity between the three batteries.
With the improving energy density, we can soon expect 100+ kwh in the
same form factor.
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