explicit regen braking can still produce negative current when they are
driven at high speeds. As well, vehicles with a freewheel in the drive
could regenerate for brief periods from the energy stored in the
motor’s inertia. The formula used for computing this percentage is:
Fwd Ah and Regen Ah :
The actual forward amp hours and regen
(negative) amps hours to the nearest 0.0001 Ah alternate on the right
side of the screen. The net amp-hours shown on the main display is
the difference between these two.
4.3
Display Screen #5 - Peak Statistics
The peak electrical statistics yield information that is useful to
understanding the electrical limits that the battery is subject to.
Amin:
Peak negative or regen current that was captured by the meter.
Amax:
Maximum amperage that was drawn from the battery.
Vmin:
The voltage of a battery pack will sag, sometimes considerably,
when it is under heavy load. Vmin is a local minimum measurement
that shows by how much your pack’s voltage droops. Typically Vmin
and Amax occur at the same point, and the maximum power draw can
be computed from Vmin*Amax.
4.4
Display Screen #6 - Speeds and Time
Smax
and
Savg:
The maximum and average speed of the vehicle in
the programmed units of km/hr or mi/hr.
0h00m00s:
This is the trip time in hours, minutes, and seconds. It
counts only the time that the vehicle is in motion, and stops
incrementing once the speed falls to zero.
4.4
Display Screen #7 - Lifecycle Statistics
The final display screen provides the lifetime information of the battery
pack. These figures are especially useful in computing the lifecycle
costs of the vehicle and comparing the economics of different battery
chemistries. This display is not shown when the vehicle is in motion.
%Regen
RegenAh
FwdAh - RegenAh
X 100
=
8
