
User Manual
LIFEPO4 BATTERY
51.2V 100AH LFP 5KWH/LV
Battery Management System (BMS)
Voltage Protection
Discharging Low Voltage Protection -
When battery cell voltage is lower than the rated protection
value or total voltage below 42V during discharge over-discharge
protection is activated and the battery alerts the user via alarm.
The battery will then isolate and cut-off. When the voltage of each
cell recovers to rated value and total voltage restored to above
45V, the protection resides.
Charging Over Voltage Protection -
When charging, the system stops charging when the total voltage
of the battery pack is higher than 54.75V or the voltage of any
single cell reaches the protection value. When the total voltage
returns to below 52V and the cell voltage returns to below the
rated protection value, the protection is release.
Temperature Protection
Less/ Over temperature protection in charging:
When the battery’s temperature is beyond range of 0~+45
during charging, temperature protection is enforced and
device stops charging. The protection is released when it
recovers to rated return range.
Less/ Over temperature protection in discharging:
When battery’s temperature is beyond range of -10~+45
during discharging, temperature protection starts and the
device stops supplying power to the outside. The protection
is released when it recovers to rated return range.
Other Protection
Short Circuit Protection:
When the battery is activated from the off state, if a short circuit
occurs, the DC circuit breaker will act first. If the DC circuit
breaker does not operate, the BMS will start the short circuit
protection function and cut off the external voltage output.
Self Shutdown:
When device connects no external loads for over 72 hours
the device will activate dormant standby automatically.
Caution:
The maximum working current of the load which needs to be
powered should be less than the maximum discharge current
capacity of the battery system
Current Protection
Over Current Protection in Charging -
When the charging current is greater than the protection value an
internal alarm is activated and the system stops charging. After the
system delays the rated time for 1 min, the protection is released.
Over Current Protection in Discharging:
When the discharging current is greater than the protection value, the
battery signals an alarm and the system stops discharging. After the
system delays the rated time for 1 min, the protection is released.
SYSTEM
STATE RUNNING
STATE
RUN ALM SOC
EXPLAIN
Shut down Dormancy OFF OFF OFF OFF OFF OFF ALL OFF
Standby Normal Flashing 1 OFF OFF OFF OFF OFF
Charging
Normal Flashing 1 OFF According to the power prompt
Over current
alarm Flashing 1 Flashing 2 According to the power prompt
Over voltage
protection Flashing 1 OFF OFF OFF OFF OFF
Temperature Over current
protection Flashing 1 Flashing 1 OFF OFF OFF OFF
Discharge
Normal Flashing 3 Flashing 3 According to the power prompt
Alarm Flashing 3 Flashing 3 According to the power prompt
Temperature, Over current,
Short circuit protection OFF OFF OFF OFF OFF OFF Stop discharge, Mains offline
48h no action forced sleep
Under voltage protection OFF OFF OFF OFF OFF OFF Stop discharge
Flashing 1 = bright 0.25s Light out 3.75s
Flashing 2 = bright 0.5s Light out 0.5s
Flashing 3 = bright 0.5s Light out 1.5s