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Would you consider purchasing an electric car?

Walter Featherstone
I ask because of my previous misconceptions, where I thought they’d be impractical because of limited range and slow charge times, not that cheap to run compared to petrol and expensive to purchase. Our last event “Electric Vehicle Revolution”, presented by David Greaves of Schneider Electric has really changed my mindset. Seemingly 100 miles or more on a single charge is feasible (further for extended range vehicles) and a fast charge, at for instance a service station, could be as quick as 25 minutes – just time to grab a coffee. Based on the cost of petrol versus that of electricity, 100 miles could be almost 90% cheaper in an electric car, easily justifying the cost of that coffee! Electric cars are more expensive to purchase, but there are currently some pretty hefty government subsidies available. These aren’t likely to be around forever, so maybe now is the time to buy… what are your thoughts?
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    There has been announcements recently that latests developments of Lithium-Solid Sulphur cells could produce batteries that would give electric cars a range of 400 miles per charge. The watts per pound and per unit volume are certainly impressive. Lower capacity non solid sulphur versions are already being delivered for military use. 



    Has anyone done the calculations for the amount of energy required to be available from a battery for a 400 mile range car (taking into account the efficiency of the brushless motor(s), the converter(s), cables etc)?



    My question is prompted by the thought of how big the charger supply would need be for a 400 mile range. There are Lithium Polymer batteries around now that can be charged at the 10C rate but I see that this would need to be much higher to compete with petrol/diesel vehicle's re-fuel times. A quick calculation would indicate that recharge time would still be too long unless the electricity supply was of industrial size.

    Perhaps battery replacement stations would need to be considered again for a 400 mile range car so that batteries could be recharged over a longer time period.

    But first the facts - how much energy would need to put back in during recharge?



    Yes, I would buy a 400 mile range electric car if the recharge time and battery replacement cost issues were not prohibitive.
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    There has been announcements recently that latests developments of Lithium-Solid Sulphur cells could produce batteries that would give electric cars a range of 400 miles per charge. The watts per pound and per unit volume are certainly impressive. Lower capacity non solid sulphur versions are already being delivered for military use. 



    Has anyone done the calculations for the amount of energy required to be available from a battery for a 400 mile range car (taking into account the efficiency of the brushless motor(s), the converter(s), cables etc)?



    My question is prompted by the thought of how big the charger supply would need be for a 400 mile range. There are Lithium Polymer batteries around now that can be charged at the 10C rate but I see that this would need to be much higher to compete with petrol/diesel vehicle's re-fuel times. A quick calculation would indicate that recharge time would still be too long unless the electricity supply was of industrial size.

    Perhaps battery replacement stations would need to be considered again for a 400 mile range car so that batteries could be recharged over a longer time period.

    But first the facts - how much energy would need to put back in during recharge?



    Yes, I would buy a 400 mile range electric car if the recharge time and battery replacement cost issues were not prohibitive.
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