Alpha Technologies Cordex Controller Ver.2.0 - Manual (Page 47)

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6.4.8.4 Peukert Number
This number can be entered in two ways. If the Supervisor has a Peukert number from the
battery manufacturer, then it can be entered as a simple, one step numeric entry.
NOTE: The Peukert number relates to the internal resistance of a battery and provides an
indication (inversely) of the expected capacity; that is, a lower number is better.
If the Supervisor does not have a Peukert number, it must be calculated. This multi-step
process involves entering four numbers derived from battery manufacturer’s specifications.
Resulting Peukert number should be above 1.000 and below 2.000.
Figure 35–Battery Properties and Peukert Calculator windows
Peukert Calculator
To calculate the Peukert number the Supervisor must enter unique values for Peukert Time 1
and Peukert Time 2 and the corresponding discharge current for each. This information is taken
from the battery specification sheet. Typically, time values of two hours and twenty hours
provide the necessary data for the Peukert number calculation.
6.4.8.5 Temp Comp Slope
This menu item enables the Supervisor to enter the desired temperature compensation slope.
6.4.8.6 Number of Cells
This menu item enables the Supervisor to enter the number of battery cells per string.
6.4.9 Battery Information
The web interface provides an additional window to enter/view the manufacturer’s data for the batteries in the
system; e.g., for inventory purposes. When entering data, the tab key may be used to move the cursor from one
data entry box to the next data entry box. See Figure 36 below.
NOTE: This information is separate from the battery properties (see previous section) used for the existing battery
management features of the CXC. The data must be obtained from the battery supplier and entered by the CXC
Supervisor.
Figure 36–Battery Information web interface window