Quote:
Originally Posted by IamIan
It's the 12 kw/kg power density of the flywheel that is the hard part for beating KERS ... Maybe with some high end capacitors... while the energy density ~22wh/kg of the flywheel is not great ... that 12kw/kg power density of the flywheel is a real monster.
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It would seem fairly simple (technically) to build a system with a flywheel as buffer between battery and motor. You'd want a capacity of 2X braking energy from highway speed, and aim to keep it at 1X...