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6.4.8.4Peukert 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 36–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.

6.4.8.5Temp Comp Slope

This menu item enables the Supervisor to enter the desired temperature compensation slope.

6.4.8.6Number of Cells

This menu item enables the Supervisor to enter the number of battery cells per string.

6.4.9Battery 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 37 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 37–Battery Information web interface window

0350046-J0 Rev C

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