4
the most efficient rate of charge current for the connected battery, according to its state of charge, state of
health, and electrical storage (Ah) capacity. The delivered current may be anywhere from 2.5A to 9.5A.
VERY FLAT NEGLECTED BATTERIES: Pay particularly close attention to the following A LiFePO
4
battery
left deep-discharged for an extended period may develop permanent damage in one or more cells.
Such batteries may heat up excessively during charging.
During the SAVE mode the program limits charge
current if the voltage is below nomimal (12.8V) and the program should detect obvious cell damage and will
automatically suspend charging, but the higher the cell count in parallel the more difficult it is to detect a bad
cell e.g. a 5Ah battery made with standard cylindrical cells typically has 4 series connected sets of 2 parallel
cells (4S2P configuration - total 8 cells), a 10Ah battery has 4 series connected sets of 4 parallel cells (4S4P
configuration - total 16 cells).
ALWAYS monitor the battery temperature during the first hour, then hourly there-after. If at any time
the battery is uncomfortably hot to touch or you notice any unusual signs, DISCONNECT THE CHARGER
IMMEDIATELY.
STEP 1
CONNECT
TO THE
BATTERY
Protection
BMS
RESET
TUN
E
B
M S rese
t
TUNE
1a 1b
2
E
se
t
Bms
Bms
4
3
LED #1a & LED #1b: Confirms AC power supply to the charger.
BATTERY CHARGE MODE LED #1a -
To save, charge and
maintain the battery.
(for TUNE mode LED #1b, see page 8).
OptiMate Lithium automatically activates and LED #1a brightens if the
connected battery voltage is at least 1 Volt.
The program proceeds directly to STEP 2.
Charger will not proceed without user
interaction.
LED #2 REVERSE POLARITY:
Lights when the battery connections
are incorrect.
The charger is electronically protected so no damage
will result, and the output will remain disabled until the connections
are corrected.
BMS RESET:
for batteries with integrated battery management
system (BMS) that protects against deep discharge.
IMPORTANT! Before proceeding, confirm the battery is connected
correctly: Read the section on the previous page: CONNECTING
CHARGER TO THE BATTERY.
Press the BMS RESET pushbutton.
LED #3 lights every second as a
special BMS reset pulse is delivered.
When the OptiMate Lithium
senses the battery BMS has reset
the reset pulses will
automatically discontinue and the program will continue to STEP 5.
Remove finger from pushbutton.
BMS not resetting:
LED #3 lights briefly and then turns off:
A deep
discharged battery may not hold sufficient voltage to power its own
BMS system. Use the MANUAL RESET: place and hold finger on BMS
reset button for 10 or more seconds, until the program continues to
STEP 4.
BMS not resetting:
LED #8 flashes/blinks.
1) Battery is connected in reverse polarity. Correct the connections
and try again. 2) The system powered by the battery is preventing
the pulse from being delivered. Disconnect or turn off the system
and try again. 3) The battery's BMS or the battery itself may have
suffered damage. Have the battery professionally assessed.
More:
4) An advanced battery management system may include
thermal protection that prevents reset if the battery temperature
falls outside of the manufacturer recommended safe operating
temperature range. Check battery manufacturer's specifications.
