Over Temperature Protection - Carbest 81382 Benutzerhandbuch

5 Cell Overvoltage and Cell Undervoltage
The battery can detect cell overvoltage/undervoltage and protect battery cells from damage
from battery cell overvoltage/undervoltage. If the max cell voltage reach 3.9V remains over
2s, the battery goes into overvoltage condition and TURN OFF the CHG MOSFET. The battery
recovers from a cell overvoltage condition if all the cell voltages drop below the cell overvolta-
ge recovery threshold (3.8V). In a cell overvoltage condition, the CHG FET is turned on during
discharging to prevent overheating of the CHG MOSFET body diode.
If the min cell voltage reach 2.3V remains over 2s, the battery goes into undervoltage condition
and TURN OFF the DSG MOSFET. The battery recovers from a cell undervoltage condition if all the
cell voltages reach up the cell undervoltage recovery threshold (2.5V). In cell undervoltage condi-
tion, the DSG MOSFET is turn ON during charging to prevent overheating of the DSG MOSFET
body diode.

6 Over Temperature Protection

The battery has over temperature protection from both charge and discharge conditions . When
charging, if pack temperature reaches or surpasses 60°C or MOSFET temperature reaches or
surpasses 85°C over 2 seconds, charging is disabled and CHG MOSFET is turned off. When pack
temperature is equal to or below 55°C and the CHG MOSFET is turned ON. In over temperature
condition, the CHG FET is turned on during discharging to prevent overheating of the CHG MOS-
FET body diode.
When discharging, if pack temperature reaches or surpasses 65°C or MOSFET temperature
reaches or surpasses 85°C over 2 seconds, discharging is disabled and DSG MOSFET is turned off.
When pack temperature is equal to or below 60°C and the DSG MOSFET is turned ON. In over
temperature condition, the DSG MOSFET is turned on during charging to prevent overheating of
the DSG MOSFET body diode.
7 Cell Balancing
When the lowest cell block's voltage >3.280V and any cell bank's voltage is more than the lowest
cell bank 50mV, the balance circuit will be turn on.
8 SMBus Communication
The battery pack shall be capable of communicating with the PC via SMB us communication.
9 Software Over-Current Protection
When discharge current exceeds 160A (10S), the discharge MOSFETs are TURN OFF, no current
is drawn from the battery. When charge current exceeds 90A (2s), the charge MOSFETs are TURN
OFF, no current input to the battery.
When the pack is removed and reinserted the over current is cleared.
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