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Smart BMS with SMBUS for 3-4S battery packs

size: L102*W50*T5mm

Descriptions: Leadyo designs and produces battery protection circuit module,battery protection circuit board,battery managemant system,PCM,BMS,PCB,BMS for 4S 14.8V 12.8V 3S 11.1v 12.6V battery Packs BMS with Smbus port

Smart Battery Systems (SBS) s for 3S(11.1V)~4S(14.8V) LiFePO4 / Li-ion and Li-Polymer battery pack (1Ah-32Ah) with I2C,HDQ Interface.

For Battery Type: LiFePO4 / Li-ion/Li-Polymer;

For 3~4 battery cells in series;

With I2C and HDQ interface communication;

Can show the battery pack information via connecting to LCD or PC


 Protection Circuit Module Specifications  For 12.8V LiFePO4 Battery  Pack 
No. Test   item Criterion
1 Model No PCM-G04S60-938 3-4S
2 Design Capacity Battery Pack Capacity 1-30Ah
3 Voltage Charging voltage DC:14.6V  CC/CV
Balance voltage for single cell 3.60±0.025V
4 Current Balance current for single cell 58±5mA
Current consumption for single cell 100μA
Maximal continuous charging current 10A
Maximal continuous Discharging current 10A
5 Over charge Protection Over charge detection voltage 3.9±0.025V
Over charge detection delay time 0.7S—1.3S
Over charge release voltage 3.6±0.05V
6 Over discharge protection Over discharge detection voltage 2.0±0.05V
Over discharge detection delay time 14mS—26mS
Over discharge release voltage 3.0±0.1V
7 Over current protection Over current detection voltage 0.1V
Over current detection current 30±5A
Detection delay time   7.2ms—11ms
Release condition Auto Release
8 Short protection Detection condition Exterior short circuit
Detection delay time 200-500us
Release condition Auto Release
9 Resistance Protection  circuitry ≤70mΩ
10 Temperature Operating Temperature Range -40+80
Storage Temperature Range -40+125


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