Charging 400V Capacitor Bank from 11.1V–22.2V LiPo at 3kW: Boost Converter Feasibility

Hello All,

I am an electrical engineer, but I never took any power electronics courses. I just graduated and I am trying to do some projects to round out my understanding of electrical engineering.

I am trying to charge a bank of 400V capacitors as fast as I can. (Eventually that bank of capacitors will be connected to a linear mass driver in a later project).

For my input I will use a LiPo battery, this means I have some choices for what voltage I input depending on the number of cells I put in the battery. I plan to choose one of the following input levels:
Vin: 11.1V, 14.8V, 18.5V, or 22.2V.
Win: 3kW

Vout: 400v
Wout: 3kW - inefficiencies

My questions are:
1) Is this crazy? I understand this is both quite a high ratio, and high power requirement.
2) Is this appropriate for my needs? I have a very large purely capacitive load, everything I read assumes a resistive load. Will I cause instabilities if I try to charge a capacitor bank with a boost converter?
3) Does anyone have any information that could help me design such a circuit? (or in the case that this circuit is crazy, information about a more appropriate one).

Thanks,
Andrew

Andrew, I think you want to design a boost supply with a current regulated output (rather than voltage) that shuts down when the caps are charged (a voltage shut off)