Guru
Joined: 15/07/2006
Location: AustraliaPosts: 676
| Posted: 11:17pm 19 Apr 2008 |
Some futher performance details of the Thundersky Lithium batteries.
Acceleration
0-60km/hr in 10 seconds
0-80km/hr in 18 seconds
0-100km/hr in 29 seconds
All measured on relatively flat ground. I am not happy with these tests, the vehicle is 420??kg lighter and it feels to accelerate quicker, but anyhow that’s the numbers measured.
Amp draw
at 60km/hr between 50-100amps
at 80km/hr between 120-150amp
at 100km/hr between 180-250amps.
All measured on relatively flat ground.
Range
Have done 140km driving at 80km/hr using approx 25kw according to the screen.
Have done 93km driving at 100km/hr using 20kw, so should be able to drive 93km / 20kw x 25kw = 116km using 25kw.
This should still leave some capacity spare as the batteries are 200ah x 144v = 28.8kw
Cost
Driving 40km on 10kw is according to the BMS screen. Yes, Gordon this does make 10kw x $0.06 / 40km x 100km = $1.50 per 100km, but not correct due to the losses in the charging system etc. This is the same with driving 140km using approx 25kw.
Had driven 112km mostly at 100km/hr and used 24.5kw according to the screen. The Kw measured at the supply meter box was 37kw. Dollars then would be 37kw x $0.06 / 112km x 100km = $1.98 per 100km
Driven a total of approx 635km. These batteries have been sold and the new owner is using them in a 4wd, main application as an electric farm tractor.
These batteries are far superior to lead acid, even the speed controller can see the difference, it does not get as hot. I did not notice any thermal cut back at all. And its not that we now have cooler weather, after swapping back to the Powersonic, I have noticed the thermal cutback.
I have ordered another set of batteries and if anyone wants to get in on the same shipment, I can give a very good price. Economies of scale are very good with multiple orders in the same shipment. If anyone is interested, you will need to contact me asap.
I tested the big 60A 3phase charger at the local saw mill and it works very good. It can charge the battery pack in 3-5hrs from right empty. For those that don't have 3 phase power, the option is, Thundersky have granted the normal warranty on the bateries if we use Zivan NG3 (single phase) chargers, along with the Thundersky BMS.
I would not build another EV with lead acid! of any form.
The Powersonic batteries are good, but probably better suited to the wind and solar applications.
Trev @ drivebynature.com