Specifications

Curtis 1310 Manual, Rev. B
19
1 6 F E B R U A R Y 2 0 0 8 D R A F T
3 — PROGRAMMABLE PARAMETERS: Battery Parameters
BATTERY MENU
ALLOWABLE
PARAMETER RANGE DESCRIPTION
Nominal Voltage 24–48 V Must be set to the vehicle’s nominal battery pack voltage. This value is
Nominal_Voltage 1536–3072 used in determining the number of cells in the battery pack for the BDI
parameters
.
Reset Volts Per Cell 0.00–3.00 V At power up, the BDI is reset to 100% if the battery is measured above
BDI_Reset_Volts_Per_Cell 000–3000 this setting. Typical value is 2.09 V.
Reset Volts Per Cell must be set higher than Full Volts Per Cell.
Full Volts Per Cell 0.00–3.00 V The BDI will output 100% (full) while the average voltage per cell resding
BDI_Full_Volts_Per_Cell 000–3000 is above this setting.
Empty Volts Per Cell 0.00–3.00 V The BDI will output 0% (empty) when the average voltage per cell reading
BDI_Empty_Volts_Per_Cell 000–3000 is below this setting.
Discharge Time 0–600 min. The time it will take the BDI to go from 100% to 0% at maximum current
BDI_Discharge_Time 0–600 drawl.
BDI Reset Percent 0–100 % If the previous BDI % value was above this point at power up, the BDI
BDI_Reset_Percent 0–100 will not reset, even if the battery is measured above the Reset Volts Per
Cell level. This will prevent a slightly discharged battery from “floating” and
resetting the BDI at every power up.
Battery Discharge Indicator algorithm
The 1310 controller contains a sophisticated battery state-of-charge algorithm.
Set up properly, this algorithm can track the remaining battery charge (in per-
cent) using only a voltage reading from the B+ power tab or J1-24. To achieve
any accuracy, it is critical to set the BDI parameters correctly for the vehicle,
battery, and normal duty cycle of the application. Note that many of the pa-
rameters are in volts per cell. A normal 24V battery has 12 cells.
The remaining battery capacity is automatically updated into the variable
BDI_Percentage.
How so?