Originally posted by uzless
Anyone know anything about EESTOR Inc. and their new battery that is supposedly way better than lithium ion, recharges in 4 minutes, can power a vehicle up to 125km/hr and lasts up to 250 miles before it needs to be recharged?
No matter how much energy it stores, it is not a replacement for gasoline, it does not generate energy, just stores it. The energy to charge the battery still has to come from some place, and that still might be fossil fuel. If it comes from solar, then it may be green but if it comes from coal, it may be worse envronmentally speaking.
In answer to Fabian's question, I saw a press release saying it loses 0.02% per month as compared to 1.0% per month self discharge rate of lithium ion batteries. Some 200 times less energy loss per month.
Whether all that is true or not, 250 mile range, 5 minute recharge, etc., only time will tell. It would be great if true. It would be the ultimate commuter car if so. One thing I know about ultra capacitors is they are inherently low voltage cells, 1.5 volts or so. In order to get that up, you can say, put two in series to get 3 volts but that cuts the capacitance in half, so if you put ten in series, it is 15 volts but one tenth the capacitance, which may be ok if you have millions of farads available. Most of the electric cars I know about uses a lot higher voltage than that however, 60 volts maybe. It may not matter, you can also raise the voltage electronically but that requires electronic packages capable of operating with extremely low voltages and extremely high currents, not sure if that is done yet. For instance, the bandgap voltage of silicon is 0.7 volt so you cannot go much below that in silicon transistors and get it to operate but 1.5 volts is possible, barely. If you need say, 30 Kw to run, then if you only have 1 volt available, you need 30,000 amperes. 2 volts, you need 15,000 amps. 1.5 volts, 20,000 amps. Them is a lot of amps!
Consider batteries for car starters pump out maybe 1000 amps max, look at the size of the battery cable, then make it 20 or 30 times thicker and you have an idea of how much that would cost in copper.
So it seems they would have to be able to pump up the voltage someway, maybe a combination of cells in series followed by another stage of electronic voltage boosters. So the voltage regulator section will add to the cost of the system no matter what. I doubt seriously if anyone on earth has a 30 kw electric motor that runs on 1.5 volts, it would have to be about the size of the car if so🙂