Eltek Minipack - Battery Monitoring; Battery Symmetry Connections; Battery Symmetry - Double-Point Measurement; Battery Terminology

Quick Start Guide Minipack PS System 356808.103, v1-2006-12
15
Battery Symmetry Connections Connections
Each Smartpack controller is equipped with 8 battery symmetry inputs (on connectors
CON4 and CON3), enabling symmetry measurement of:
• 8 battery strings
using the Mid-Point Measurement Method
• 4 battery strings
using the more accurate Double Mid-Point Measurement Method
• 2 battery strings
using the even more accurate Block Measurement Method
You can implement any of these methods using one or two Battery Connection Kits (see
the illustration next page) and the appropriate number of Battery Symmetry Kits, which
contain a single cable strand with suitable cable eyes, etc.
Battery Terminology
Battery Block, Battery String and Battery Bank
48V Batter
y
Bank
Batter
y
String #1
(48V)Batt.
Batter
y
Block (12V)
Batter
y
String #2
(48V)
Battery Symmetry
Mid-point Measurement
One measurement per string
—
(-48V) Oute
r
Terminal
+
0V Oute
r
Terminal
Intercell Links
2-1
X:****
Symmetry 1
+
-
Card, Art. 200576
Serial Switches
Set all 4
switches
OFF (up)
Block1
- + + - +
B
+−
−
(
From
Notice that, if you open the serial switches in card, Art.
200576 ⎯ setting all to OFF (up) ⎯ you have to connect the
+ and – wires of every symmetry input.
Battery Symmetry
Block Measurement
Four measurements per string
(Serial measurement)
—
(-48V) Oute
r
Terminal
+
0V Oute
r
Terminal
Intercell Links
X:****
Block1
- + + - + -+-
Block4 Block3
Card, Art. 200576
Serial Switches
Set all 4 switches
ON (down)
7
Symmetry 4
+
2-1
Symmetry 1
+
-
5
Symmetry 3
+
3
Symmetry 2
+
Battery Symmetry
Double-point Measurement
Two measurements per string, from the
middle to the outer terminals
—
(-48V) Oute
r
Terminal
+
0V Oute
r
Terminal
Intercell Links
X:****
Card, Art. 200576
Serial Switches
Set all 4
switches ON
(down)
3
Symmetry 2
+
2-1
Symmetry 1
+
-
Block1
- + + - +- + -
Block4 Block3
Batt. Symmetry Kit, Art. 200830
Cable
Eyes
Single Cable Strand
Battery Monitoring Miscellaneous