4 ms·

I don't think the intent is to use the capacitor as a substitute for battery energy storage, but as a complement. I don't think these would be a good fit for EV

I don't think the intent is to use the capacitor as a substitute for battery energy storage, but as a complement. I don't think these would be a good fit for EVs, but for supercharger stations maybe? Charge/discharge efficiency and cycle lifetime will probably be higher than a battery, and in stationary applications, cost matters more than weight or volume. Of course cost depends on production volume, which isn't something you can measure in the lab, so who knows. It might also pair well with battery chemistries that are good for energy density but poor on power density, like lithium-sulfur or LFP.

cogman10 2y ago
For an EV, they could be useful in stopping/starting. Rather than having regen go to the battery you could first send it to a capacitor which then trickle charges the battery (reducing wear). And rather than pulling directly from the battery, you could pull from a capacitor first to get to cruising speed. That would allow the battery to slowly discharge into the capacitor rather than going directly into the motor at full force. You'd play to capacitors high cycle life and fast charging/discharging capabilities rather than their density.
- _carbyau_ 2y ago
  Maybe it could be used in a similar fashion for the hybrids out there.