Battery/Capacitor hybrid question

[undertow]

Hey all,

I am nearing the end of my e-bike build and over the last few months, ive been reading up about car and motorbike ev conversions with regards to their battery systems.
In the future I plan on building an e-motorbike, followed by the car, and ill be going down the simple-concept path for the bike, being a brushed DC motor (motenergy and the like) and want to try running a 72-100v system.

Now this is all far in the future, but im wondering if it is possible/feasable to make a supercapacitor pack in a circuit so that it is charging from the battery when not in use, and when wanted, perhaps a remote switch to allow discharge to the PMDC motor for the larger amperage ie. 400A for up to 1min between those voltages?
Second question, will say a 72v pack be able to charge a cap bank above 72v?

Lastly, sorry for the noob questions, but never really had any exposure to using/calculating capacitors, or how charging them from a battery really works in the real world.

Cheers everybody!

 

[dogman dan]

We all start out as noobs with a dream. The practical thing to do is just get batteries of a sufficient quality to handle the discharges you are planning on.

When you get into it, you find that to go far, you need a big enough pack to handle quite a few amps. So caps aren't really needed, and they cost more than decent battery. Switches to carry that much DC current are pretty costly too btw.

KISS principle works best in many ways. Good battery, thick wire, etc. But controllers can have switches that enable several different power levels, so instead of switching in more battery or caps, you just enable high power mode of the controller.