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I have always thought Tesla should be using the "dual" system of Ultracaps and Lith batts to reduce the strain of stop and go driving on the cars chemical based power source.
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Problem is, current ultracaps may not suffice. They bring too little on the table to be worth the effort, cost, added complexity and possible points of failure.
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One point brought up is that the voltage range from 'full' to 'empty' is much greater, so your PEM/inverter electronics would be more complicated.
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Has anyone found out what could be done? Wide range DC/DC converters are supposed to be inefficient - efficient only in thin voltage range.
Sometime ago I was thinking of dynamically reconfigurable ultracap grid. When fully charged it would be mostly parallel connections, then as it discharges, the connections would reconfigure into serial ones keeping the outcoming voltage higher. Trouble is, this could be done as long the ultracap-storage still contained most of the total charge.
Linear Mode
