EG4 LL User Manual

23
Current Protection
The BMS is designed to constantly monitor the charge/discharge amperage and has built-in safeguards
against exceeding specific parameters. These include built-in timers that shut off quickly in the event of
short circuits, extremely high amperage and delayed shut down for amperage that is only slightly above
the maximum capacity.
7.2 TROUBLESHOOTING
7.2.1 ALARM DESCRIPTION AND TROUBLESHOOTING
When the ALM light on the battery control panel is on, it means that the battery has given an alarm or
has been protected from potential damage. Please check the cause of the failure through the app or
BMS Tools and take appropriate measures or go directly to the battery site to troubleshoot.
BMS Tools alarms are shown in the table below:
Warning and Protect Status Definitions
Status
Name
Definition
Action
Warning
/Protect
Pack OV
Pack over-voltage
Module needs to be discharged to lower
its voltage.
Cell OV
Cell over-voltage
Check individual cell voltage in BMS
Tools.
Pack UV
Pack under-voltage
Module needs to be charged.
Cell UV
Cell under-voltage
Check individual cell voltage in BMS
Tools.
Charge OC
Charge over-current
Incoming current needs to be reduced.
Discharge OC
Discharge over-current
Discharge current is too high; lower
loads.
Temp Anomaly
Temperature anomaly
Check ambient and module
temperature.
MOS OT
MOSFET over-temperature
BMS temperature is too high. Power off
module and cool down location.
Charge OT
Charge over-temperature
Power off module and cool down
location.
Discharge OT
Discharge over-temperature
Power off module and cool down
location.
Charge UT
Charge under-temperature
Power off module and warm up
location.
Discharge UT
Discharge under-temperature
Power off module and warm up
location.
Warning
Low Capacity
Low battery capacity
Module needs to be charged.
Warning
Other Error
Error not listed
Contact the distributor
Protect
Float Stopped
Float Stopped
Contact the distributor
Protect
Discharge SC
Discharge short-circuit
Discharge current is too high, turn BMS
and breaker off and back on to reset.
Lower loads.

EG4 LL Specifications

General

Nominal Voltage	51.2V
Nominal Capacity	100Ah
Energy	5.12 kWh
Max. Continuous Discharging Current	100A
Warranty	10 years
Cycle Life	6000 cycles @ 80% DoD
Communication	CAN, RS485
Scalability	Up to 16 in parallel
Operating Temperature	-4°F to 131°F (-20°C to 55°C)
Battery Type	LiFePO4
Protection	High Temperature, Low Temperature, Short Circuit
C Rating	1C