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AVR454
Figure 2-3. CONN2 wiring and jumper settings for battery simulation
CONN2
V-SIM GND
24V
-
+
V-SIM +24V
FETs
1
JB3
J1
JB4
1
GND
±5V
I-SIM +/-5V
I-SIM Gnd
Table 2-4. JB3: Cell voltage simulation jumper block
Pin
1
2
3
4
5
6
7
8
9
10
Name
SIM-CELL4+
CELL4+
SIM-CELL3+
CELL3+
SIM-CELL2+
CELL2+
SIM-CELL1+
CELL1+
SIM-CELL1-
CELL1-
Direction
Usage
Short these two pins to connected
simulated CELL4+ to smart Battery
Short these two pins to connected
simulated CELL3+ to smart Battery
Short these two pins to connected
simulated CELL2+ to smart battery
Short these two pins to connected
simulated CELL1+ to smart battery
Short these two pins to connected
simulated CELL1- to smart battery
2.1.4 Wiring for live Li-Ion battery cells
WARNING:
When using live cells, never leave the system unattended due to the potential
hazards associated with the use of Li-Ion cells. Do not apply high charging or
discharging currents to the cells until you have verified that all safety systems,
both hardware and software, are functional under the specified conditions.
Normal cell wiring is shown on the SB100 board, labeled as such. The ATmega406
supports from two to four stacked Li-Ion cells. As many cells as required may be
connected in parallel. A jumper should always connect CELL1- (CONN2 pin 8) to
Sense Resistor High (CONN2 pin 9) to enable the current-sense resistor. Cells
should always be connected on the lower positions first. The FET connection
(CONN2 pin 3) should be tied to the most positive cell connection (either CELL4+,
CELL3+ or CELL2+).
When using live cells, all jumpers should be removed from JB3. Additionally, the
sense resistor should be connected to the CCADC inputs by shorting JB4 pins 1-3
and 2-4. It is possible to use the Current Simulator while connected to live cells simply
5
2598C-AVR-06/06
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