look at the data. We used 19.281 kWhrs but the voltage never sagged
below 332V even at the 400 amp current levels. Yesterday's power
problem was hot motors, not soft batteries. In just 8 laps, the
motor temps had climbed to 157 degrees C, just short of their 175
degrees C cut off point. Another lap and we might have lost power.
crew gets to work on cleaning up the airflow going into the battery
boxes. Less air restrictions, more air through the radiator, cooler
also decide to try more camber and shock pressure in the rear to
try and improve rear tire bite for turn 6.
temperatures showed some variation. On cell # 1, there are three
temperature sensors. The one near the positive cell terminal read
10 degrees C hotter than sensor located at the middle of the cell
and 15 degrees hotter than the sensor at one of the lower corners.
The maximum temperature is 55 degrees C at the positive terminal.
This pattern is repeated on the other cells.
use .952 kWhrs per mile.
charge for 3 hours and 10 minutes. It is a hot day and the charger
goes into thermal limit. Even with a big fan blowing into the trunk,
the charge current drops to around 12 amps.