4S 12A 12.8V LiFePO4 BMS/PCM/PCB battery protection circuit board for 4 Packs 18650 Battery Cell with Temperature Switch
Features:
1) high-accuracy voltage detection circuit;
2) terminal of the charger using high voltage device;
3) Built-in three-stage over-current detection circuit (over-current 1, over-current 2, or load short circuit);
4) MOS transistor can control the battery charge and discharge;
5) low standby current consumption.
Parameter:
over charge: 3.75V
over discharge: 2.1V
charge voltage: 3.6V * 4 = 14.4V
continuous work current: 12A
over current: 40A
balance voltage: not support
balance current: not support
size: 42mm * 34mm * 10mm
![](https://ae01.alicdn.com/kf/HTB1V.QuLXXXXXaSaXXXq6xXFXXX4/224459592/HTB1V.QuLXXXXXaSaXXXq6xXFXXX4.jpg?size=139435&height=801&width=800&hash=bb85996ca5244632954385adf5cd3429)
![](https://ae01.alicdn.com/kf/HTB12t3vLXXXXXaXaXXXq6xXFXXXi/224459592/HTB12t3vLXXXXXaXaXXXq6xXFXXXi.jpg?size=179358&height=945&width=793&hash=57de77b421ad56de6a3917cd1ff580c0)
Wiring diagram
B4+ Charge/discharge positive
P- Charge/Discharge negative
![](https://ae01.alicdn.com/kf/HTB1cuZHLXXXXXc0XFXXq6xXFXXXZ/224459592/HTB1cuZHLXXXXXc0XFXXq6xXFXXXZ.jpg?size=68988&height=500&width=600&hash=6c34cb4c190c96d62271c5bdee885d7d)
![](https://ae01.alicdn.com/kf/HTB1tmZHLXXXXXaTXFXXq6xXFXXXm/224459592/HTB1tmZHLXXXXXaTXFXXq6xXFXXXm.jpg?size=65368&height=400&width=600&hash=380b2b6bf90eaa583783bb0480e7dc9f)
![](https://ae01.alicdn.com/kf/HTB1P3gOLXXXXXXwXFXXq6xXFXXXM/224459592/HTB1P3gOLXXXXXXwXFXXq6xXFXXXM.jpg?size=80811&height=500&width=600&hash=984f5c00e29b89ea4a203b581739bda6)
Applications:
4S lifepo4 Rechargeable batteries
Notice:
1. Please pay attention to the use condition of input and output voltage and load current , make the protective plate within the power consumption of no more than specification allows power consumption;
2. Connect the battery will happen cannot discharge status, in this case, connect the charge can be restored to normal working state;
3.If a set of batteries with over-discharge and over-charge cells, the bms cannot be charge and discharge.
![](https://ae01.alicdn.com/kf/HTB1xcaPLXXXXXagXXXXq6xXFXXXJ/224459592/HTB1xcaPLXXXXXagXXXXq6xXFXXXJ.jpg?size=70130&height=375&width=500&hash=2a614d875d4b1cf945cab159d4049fad)