How can Tesla Motors can benefit from a Graphene Battery

How can Tesla Motors can benefit from a Graphene Battery

The Super Supercapacitor is a Graphene Battery or actualy a Supercapacitor. Check out the video

Timo | January 31, 2014

Old video. Answer to headline question: it can't.

Supercaps have very low energy density, even graphene ones. Charging speed also is not limited by battery tech, it just is very challenging to make multi-MW charger safely. For RC hobby you can find several battery types that can have continuous 60C charge/discharge. That means one minute charging.

Charging 85kWh in one minute requires 5100kW of power. That's 5.1MW.

nikolateslas88 | January 31, 2014

However.....has anyone heard of silver oxide batteries???? Nasa used them well over 60 yrs ago!!!! Look up those energy density charts you will be surprised!!! Its an Alkaline type battery, newer silver batteries are even rechargable...

Timo | January 31, 2014

Have you any recent data for them? Wikipedia mentions 130Wh/kg which isn't exactly high specific energy. Current 2.9V Panasonic batteries have about 232Wh/kg.

nikolateslas88 | January 31, 2014

Really? i guess not that good then lol. I must have read the wrong

Timo | February 1, 2014

Wiki isn't always up to date, so what you did read might have some newer data.

Haeze | February 2, 2014

I thought the reason you couldn't charge the Tesla pack faster was due to heat damage/thermal runaway concerns that would reduce the pack's longevity, and possibly catch it on fire. If the problem was as easy to solve as simply dumping more power into the pack, I would have expected Elon to simply make a Super Capacitor bank a standard feature of a SuperCharger station. Then you could dump that 5.1MW in seconds flat.

Timo | February 2, 2014

It depends of battery chemistry. Model S battery pack can't handle that much power, but there are chemistries that can. All of those have about ~10x energy density of supercaps.

It also would require either high voltages (which increases danger of arcing) or very thick wires (not practical).

I have thought about "battery swap lite" where you just open up a slot beneath a car, use couple of heavy duty cables with robots, charge away and close the slot. Instead of swapping battery you charge with huge power.

You don't need to get full battery in one minute, something like 10 minutes is more than enough for that kind of hypercharger. 6C batteries are commonplace, it's possible that Tesla batteries can handle that as well if you manage to keep them cool (could need some redesigning of cooling system).

I wonder, do anyone know how high continuous current Tesla batteries can handle? It's pretty high, but how high?

slipdrive | February 3, 2014

@Timo. The direct high power concept is indeed intriguing. It it would seem a central issue is dissipating heat from the core of the battery pak. Rather than on-board, they might be able to incorporate a stationary land-based cooling system, like circulating coolant fluid into/around/from the cells in a NextGen pack design, for use during high power charge. Seems no more complicated than a full battery swap, in the long term.

Brian H | February 3, 2014

Why not use pre-chilled electrons? <;-}

10 minutes is not far off what Straubel is talking about already.

just an allusion | February 4, 2014

This smalls suspiciously like patent trolling thread.

ian | February 4, 2014

You're killing me Smalls!

Haha! ;-)