Gencis
Posts: 18
Joined: Fri May 04, 2018 2:45 am

Re: Range extender !

Fri Jun 08, 2018 8:45 pm

Thank you for the information. Now I get better idea about batteries. I saw some videos in youtube, like this:
https://www.youtube.com/watch?v=NlZ6BOzn41g&t=1s

so thought this idea could work. But with your, JoeS, calculation I can see that carrying additional 130 kg plus it would cost around 1.500 EUR. And finally max range I get 20 km. So it is too expensive and too little use. I think this is the step each new EV owner has to pass:)

mistert
Posts: 1
Joined: Sun Nov 25, 2018 2:07 am

Re: Range extender !

Sun Nov 25, 2018 3:07 am

Why not use ultra capacitors to extend the range a little bit:

https://newatlas.com/nawa-technologies- ... tor/54972/

These are for over a few years, but supercapacitors you can already buy :

https://www.alibaba.com/product-detail/ ... 7291Jqa7po

I am not a HV elektronics engineer but normal low voltage battery always have large capacitors to cope with high peak currents.
Strange there are no huge capacitors in an EV battery.
This will extend the live of the battery pack for sure, and maybe if you make them large enough extend the battery with a few extra Kwh.
If you put them in parallel with the battery pack it will automaticly being charged when the battery is charged.
You have to limit the current of course or you will blowup the charger..
The brake gereneration will work 70% better because all the current can be absorbed by the capacitors.
And the current to the motor can almost be unlimited, so the Imiev will fly ;)

Although there is the problem that if you make a capacitor pack for 400V only a small portion of the capacitor will be used. Because the voltage will never go lower then 300V, only 1/4 of the capacitors will be used. So maybe a DCDC converter is needed and use a 46V capacitor pack.

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