If we talk about supercapacitors

[Obelix]

Hello,

On the NET and in particular on E-Bay one can currently find supercapacitors for an "affordable" price.
http://cgi.ebay.fr/CONDENSATEUR-CONDO-4 ... 286.c0.m14
Their value from 1 to 40 Farads for a service voltage of 16 Volts allows you to start dreaming of concrete applications.

For example a VAE (electrically assisted bicycle) with fast recharge.
A 40 Farads block stores an energy of 5000 Joules.
Not everything can be recovered but there is enough to roll a bicycle for a few minutes ....
16 Volts is a bit fair for the motors used, no matter what a Boost converter will raise the voltage to the right value with an efficiency of 90%.
What is interesting is that the recharge requires only a point supplying 16 Volts well regulated and a car bulb and in a few seconds we are ready to go.
The icing on the cake is that the weight is less than a battery of equivalent capacity.

The same is true if you want to store energy. All you need is modest needs and a charging system adapted to your problem.

What do you think ??

Obelix

[Remundo]

Hi Obelix,

40 Farad on 20 V is 16000 Joule

or 4,44 Wh.

Not much, however, in long use (role of batteries).

But in transient:
- Enough to absorb the braking energy of a 90kg bike that travels at 19,3m / s or 67 km / h: good!

For a 1000 kg car: 5.65 m / s, i.e. 20 km / h

A bit tight unless you put several.

@+

[Former Oceano]

In fact for me this is the advantage of the supercapacitor. Being able to absorb a very large intensity resulting from vehicle braking. Conventional batteries, even litium polymer cannot absorb all the power, or else you would have to have quite a few in parallel which would be expensive.
On the other hand, supercapacitors would make it possible to take the overload of intensity that the batteries cannot absorb and thus to store the energy which would have been lost.

[RIAZ]

If we consider that a significant electrical assistance, it is a power of 100 W, 4,4 Wh help us for 158 seconds ....

If you want real super-capacitors, go see http://en.wikipedia.org/wiki/Eestor , and many other places .... we are starting to talk about it.

But for an extraordinary announcement (like this one), you need equally extraordinary evidence ....