Skeleton Technologies Presents Ultracapacitors In Fully Charged – Video

JUL 23 2018 BY MARK KANE 15

Skeleton Technologies is an interesting startup from Estonia, which develops and produces ultracapacitors that could be utilized in electric vehicles.

Skeleton Ultra Capacitors

There is no way that ultracapacitors would replace batteries as their energy density is way too low, but the power output makes them complementary products to batteries.

Small ultracapacitor modules could take all of the peak charge (regenerative braking) and discharge (acceleration), potentially doubling the longevity of the battery pack.

Skeleton Technologies demonstrated a small 10 kg module that was able to deliver 100 kW for a few seconds (it’s enough to accelerate or decelerate the sports car from 0-60 mph or 60-0).

“We visit Skeleton Technologies in Tallinn, Estonia to find out how these remarkable products are made and what they do.
Curved graphene. Yummy.

Imagine an electric car with batteries and ultra capacitors that can soak up all your regenerative braking generation and use it to accelerate the vehicle later. Hugely reducing strain on the battery and increasing lifespan and range. Nice.”

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15 Comments on "Skeleton Technologies Presents Ultracapacitors In Fully Charged – Video"

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I can see this as beneficial. Good idea. I guess the question is, how long can these super capacitors hold a charge? Is it long enough to be of practical use?

Probably limited to recover on deceleration and supply on acceleration. If very efficient, could mean very little main battery drain in a city environment.
Might also be an enabler for in-road charging.

For regenerative breaking, even just a few minutes would be of practical use, as they can transfer the charge to the main battery over time…

To keep a reserve for acceleration, a much longer charge holding capability is required of course. But I don’t think any capacitor has issues holding a charge for hours or even days?…

Agreed, but were I a first responder, I would be pretty scared of post-crash electrocution. Perhaps a pyrotechnic charge would be of use.

Of course, this guy wants to sell his capacitors, I’ve heard figures of 20-25% recooperating, so with these he might improve efficiency of regen by 2% or so….. But I’m skeptical about the 30% improvement over an already very good hybrid or BEV

This seems more suited for hybrids and FCEV. For large battery BEV (and SparkEV), regen is not a problem since regen power level is about that of DCFC power.

Depends on the usage pattern. In racing, heat build-up in the battery is a major concern; so extra heating from regen breaking is a problem.

I agree though that it probably doesn’t make much sense for an “ordinary” BEV…

For racing use, I see another benefit in quick discharge for rapid acceleration out of turns. Perhaps this will appear alongside batteries for performance oriented EV (eg. Camaro EV or Corvette EV).

Caps don’t really add value to big battery EVs. If someone developed a very cheap, lightweight battery with poor power density, a Cap could help. I don’t know if any such batteries, though.

I was under the impression that batteries with poor power density — i.e. early solid state batteries — are kinda your favourite topic?…

They tout grid applications as a major use case; but I don’t believe there is much room for that longer term. Capacitors for responding to short high-power bursts certainly make sense along with longer-term storage technologies that provide a lot of energy but little power (such as flow batteries); however, Li-Ion batteries offer a combination of both, leaving little room for dedicated short-term storage as far as I can tell…

Nice! This would be helpful in my Leaf.

BlueLA and IndyBlue use the Bollore Electric Vehicle with Advanced Lithium batteries and parallel Super Capacitors. It’s a great match up and makes both better. I’d call them the hybrid battery of the century. https://en.wikipedia.org/wiki/Bollor%C3%A9_Bluecar

He says and I agree, the biggest battery drain comes when accelerating hard. If the capacitors will take those peaks, the life and range of the main batteries would see a big improvement.
Let’s juat see hhow many peaks they can take before recharging, if they can efficiently recharge while driving and if they are safe at impact.

Ultracapacitors recuperate energy and this enables lesser C02 emission of up to 36% for city buses and reduce fuel consumption by 6% when using in delivery trucks or even 34% when installing in harbour cranes. The combination of batteries and ultracapacitors make a lot of sense : you prolong the life of a battery as the energy peaks are taken care of by the ultracapacitor not the battery. Also you have lesser weight. Fast charging or discharging cannot be done with a battery so the electrification will not be possible without ultracaps. Batteries store energy via chemical reactions (slow) whereas ultracaps store energy purely electrostatically by surface charge (fast). So the disadvantages of each storage device can be compensated by the other one.