Relationship Between "Bcm Batteries" And "Num Batteries; Frequency Of Measurement; Battery Cell Measurements - Rectifier RT9- 24V Installation, Operation And Technical Manual

Installation, Operation and Technical Manual

6.11.1 Relationship between "BCM Batteries" and "Num Batteries"

With the BCM option enabled, the BCM parameters must be setup before monitoring can
be performed. Following through the screens of section 6.6.4.3, the screen indicating
"BCM Batteries" is where you define the number of batteries whose cell voltages are to be
monitored by the MCSU-4. There is no need to program the MCSU-4 how many BCM
boards are connected. The MCSU-4 automatically calculates the number of BCM boards
that it requires from the number of "BCM Batteries" that you entered. The number of BCM
boards (PCBs) required for different battery configuration is shown in the following table
(48V top, 24V bottom):
Batt Config
24 cell, 2V
12 cell, 4V
8 cell, 6V
4 cell, 12V
12 cell, 2V
6 cell, 4V
4 cell, 6V
2 cell, 12V
A similar menu but for totally different purposes, appears in the Systems menu as follows:
Num Batteries X
The number of batteries entered here is the number of batteries that are being monitored
for their currents. "Num Batteries" and "BCM Batteries" are not related except that value
entered for "Num Batteries" must be greater or equal to "BCM Batteries". This is because
Num Batteries determines the number of batteries accessible via the BAT menu, via which
we access the cell voltages. So if only two batteries are defined for Num Batteries, then
access to cell voltages of Battery 3 or 4, even if they are defined as 4 in the BCM Batteries
menu, will not be possible.
Batteries.

6.11.2 Frequency of measurement.

To allow for a wide battery capacity range, which can range from 10 minutes to 8 hours,
the cell voltage polling frequency is programmable in 1 minute increments. A typical polling
interval is 4 minutes, which would yield 15 points for a 1 hour discharge. For programmed
test discharge of 30 minutes a polling interval of 2 minutes might be used. This parameter
is not accessible from the MCSU-4 front panel. It is only programmable from a PC running
WinCSU-2.

6.11.3 Battery Cell Measurements

When BCM is active, the individual cell voltages can be monitors on the MCSU-4 by
selecting a Battery from the Batt Menu and pressing ENTER. The cell information will
appear on the screen and the next and previous cells can be selected by pressing the INC
or DEC buttons. See below:
158-1872-01
BCM Batt = 1
1 BCM board 2 BCM boards
1 BCM board
1 BCM board
1 BCM board
1 BCM board 2 BCM boards
1 BCM board
1 BCM board
1 BCM board
( where X is the number of batteries)
Normally Num Batteries is set to be the same as BCM
BCM Batt = 2
3 BCM boards
1 BCM board 2 BCM boards
1 BCM board 2 BCM boards
1 BCM board
3 BCM boards
1 BCM board 2 BCM boards
1 BCM board 2 BCM boards
1 BCM board
72
Rectifier Technologies
BCM Batt = 3
4 BCM boards
2 BCM boards
2 BCM boards
1 BCM board
4 BCM boards
2 BCM boards
2 BCM boards
1 BCM board
BCM Batt = 4
1 BCM board
1 BCM board
19-Feb-14