BP-LFP-2725(D)
Revision 1-2
13
E2 Charging behaviour
The charging behaviour depends on the procedure described in chapter 'Charging process'. For this purpose,
a suitable charger should be used.
The charging process is finished when the current has dropped below the value of the Charge Term Taper
Current.
Charging an empty battery system
If a single cell falls below a voltage of 2.4 V, the discharge MOSFETs are blocked to prevent damage to the cells.
As soon as a charger is connected and its output voltage is active, the battery gets charged. The pin "System
Present" (F „Additional functions", page 15) of the communication plug must be switched to GND. If all cell
voltages exceed 3.1 V, the battery can be discharged again.
Note:
Under extreme conditions e.g. at particularly low or high temperatures, the charging and discharging be-
haviour in conjunction with your application should be checked. The cell characteristic leads to a different
voltage behaviour of the cells.
E3 Balancing
The BMS balances the cells during charging process. The necessary balancing times are automatically deter-
mined by the BMS.
E4 Discharge
The BMS switches off the output voltage when the final discharge voltage is reached. Protective functions of
temporary, reversible or permanent faults and short-circuit detection are not affected by this!
After complete discharge, charge the battery system
soon
(within 7 days) to avoid a deep discharge.
Abbreviation
Description / Condition
Comments
Charge Term Taper Current Current at end of charge
Limit
Current <100 mA
CUV_RECOV_CHG
After discharge, the output voltage remains
de-activated until a loading process has taken
place.
Function is activated
Description
Limits
Limit balancing
≥3.1 V single cell voltage (during charging)
Balancing current
~100 mA (pulsed)
