EEStor and ZENN Motors - Fall 09
Written by Greg Allen
Tuesday, 01 April 2008
Page 1 of 2
I got an email today from Ian Clifford, the CEO of Zenn Motors. He wrote that in their annual meeting of their shareholders it was announced that they plan on having a highway version of ZENN powered by EEStor in Fall 2009. EEStor? Wow.. I am glad to see some new news about them.. it's been awhile.
The emission free City Zenn is expected to be a full highway compatible vehicle with the top speed of 80 mph (125kph) and the range of 250 miles (400 kilometres). It will be powered by EEStor and will charge in less than 5 minutes. This ultracapacitor powered vechile is expected to meet the transportation requirements of a many worldwide drivers.
Here are a couple of quotes that I found interesting in the email:
“EEStor’s game-changing energy storage technology is in the advanced stages of commercialization”, stated Ian Clifford, Chief Executive Officer. EEStor has publicly committed to commercialization in 2008 and their first production line will be used to supply ZENN Motor Company.”
“The growing electric vehicle market represents a dynamic, truly global opportunity and ZENN Motor Company is excited to be a key player. In addition to the Company’s exclusive technology agreement with EEStor for new vehicles up to 1400 kg (curb weight), and the global rights to ALL retrofit conversions of existing internal combustion vehicles to electric, the Company is also an equity investor in EEStor. EEStor's energy storage technology is THE key enabler of many clean technologies today: renewable energy; grid load-leveling; consumer electronics and security applications are ALL looking for a ‘better battery.’ EEStor is the enabler.”
It appears that ZENN will own all retrofit conversions of our existing internal combustion vehicles. That will be a tremendous market by itself. Imagine charging your car for less than 5 minutes for a 250 mile range. That will be awesome. What do you think about this?
Readers have left 16 comments.
I was wondering when some new news would happen with EEStor.
This is good news !!! However, why keep pushing for a recharge in 5 minutes ??? Electrically this does not make sense.
Even if you had a second bank of ultracapacitors to dump charge from, you would need wiring capable of ten thousand amps all the way to the capacitors in the car. P still equals V x I.
A car with 400km range weighing maybe 1000kg will use 200Wh/km so will have at least 80kWh of battery. If this was at 400V then to charge it in 5 minutes would require 12,000 Amps. Have you any idea of the wiring size required ?
Be patient, have a coffee, charge it in 10 minutes !!
If we are assuming that the operating voltage is standard 12 volts. But 12 volts is not a must be. If you put capacitors in series you can increase the voltage. At 12 volts you would be charging at 40 Amps continuous charge for 5 minutes. (Assuming the above comment is correct). But if you increased the voltage to 120 volts by putting the capacitors in series. You would only have to have a 4 amp continuous charge. So it just depends. We cant't apply old technology just because thats the way its has always been.
Not to mention that FFPLUG, a private held and secrative wire and plug company, has just anounced the development of a super-thin room temperature superconducting wire.*
*note, the preceeding comment is satire and is not a direct promotion of ZENN's stock.
A Room temperature superconducting wire... Really? When will they be released for someone to look at?
Of all the comments, #2 is the most realistic. Just that he made a mistake: 12000A is the current for a 1 min charge (if 80 kWh is considered). For a 5 min the current needed is 2400A and if a 10 min is a decent waiting time in a long trip, then 1200A is needed. This is valid if a constant current charging mode (Current Source) is considered. To minimize losses, cables for a 1200A are pretty heavy including inside the car. But first I wish to see that Ultracapacitor capable to hold 80kWh and fit decently in a passenger car of 1000kg.
To actually see this technology becoming reality if this work and I hope it does for the planets sake, I for one will be first to purchase the new ZENN. If it takes longer so be it but the final outcome is we need this to get rid of our dependance on oil.
No.8 Eestor Capacitor Charging
The Eestor capacitor is a 3500 V capacitor. Charging to 57 kWhr (the stated size) at that voltage for 5 minutes requires only 200 amps. That current level is well within the capabilities of reasonable wiring.
Another thing to consider... since capacitors have an almost unlimited lifetime- capable of hundreds of thousands of recharges is would be economically possible to just pull into a "gas" station and swap out your discharged capacitor for a fully recharges one. The station would maintain a cache of fully charged capacitors ready for replacement.
No.9 Eestor Capacitor Charging
Recharging is not an issue limited by cable sizes. If the system needed high currents to recharge one could envisage the car driving onto a charging bay with floor mounted contacts that pressed up against the base of the car.
A gas station would most likely have its own substation nearby/onsite for efficient connection to the utility grid.