What DC voltage and current recharge an 8.8 kWh Chevy Volt battery in 15 minutes?

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Homework Statement



The fastest, most powerful Class III battery charger available is supposed to recharge 8.8 kWh into a Chevy Volt battery pack in 15 minutes. What is the most likely combination of DC volts and amps to do this and why?

Homework Equations



W=VxI (I = amps)
a 120 V unit can do 12 I in 6 hours

The Attempt at a Solution

 
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Discussion

If I remember correctly, P = IV (not the work, but the rate of work -- power). That would mean that you would have 8.8 [kWh]/15 [min] = I*V (be sure to convert the units appropriately). For DC circuits, I would assume the most likely condition would be the one with an appropriately large V/I ratio (more voltage and less current would imply less power loss from resistance).