Originally Posted by EVEngineeer
What do you people think I should get in order to achieve 65mph for ~100 miles range? I drive a little less than that every day at that speed. I drive a little city to at 45mph for about 25 miles range every day.
With a Civic you likely will get around 300 Wh/mile +/- 10% at 65 mph. So 100 miles would require about 30kWh. You want to discharge to no more than 20%, and if you do it everyday 30% will extend your pack life from 2000 to 3000 cycles according to the manufacturers (who knows really?). So 30 x 1.2 = 36kWh pack. If you want to drive that 25 city miles at < 45 mph, well add around 5kWh for a 41kWh pack, minimum, 45kWh would be better. If you use the motor Gotti suggested and a Zilla or Soliton Jr controller you could use say 71 cells for a nominal 227V pack (and set the controller to limit motor voltage to around 160 - 170V so you don't damage it). Then to get 45kW you would need 200Ah cells. At around $1.25/Ah delivered that would cost around $17.8k. Then just add motor, controller, charger, DC/DC converter, vacuum pump, stronger vehicle springs, bms,...costs, and figure out where you will put all those cells in a Civic.
With the about 900 lb pack you may use more like 330-340 Wh/mile at 65 mph.