4S 20A 14.8V 16.8V Li-ion Lithium 18650 Battery BMS PCM Protection PCB Board
Description:

4 series 18650 battery 16.8V 16V 14.8V
14.8V (Li-ion 18650 or li-ion battery rated voltage)
16.8V (full charge voltage of lithium ion battery)
14.4V (nominal voltage of Lipo battery pack)

Characteristics of BMS 4S 20A LI-ION Protection PCB Board:

1) High precision voltage detection circuit;
2) charger terminal using a high voltage device;
3) Integrated three-stage overcurrent detection circuit (overcurrent 1, overcurrent 2, or load short circuit);
4) MOS transistor can control battery charge and discharge;
5) Low standby current consumption.
4S LI-ION BMS parameters:
Overcharge voltage: 4.25-4.35v ± 0.05v
Upper discharge voltage: 2.3-3.0v ± 0.05v
Max. Working current: 10A
Max. Peak current: 20A
Operating temperature: -40 — + 50
Storage temperature: -40- + 80
Small current: 6uA
Life Cycle: 50000 hours
Resistance: 45mΩ
Short cut protection: protector, repair size change: 35 * 35 * 3.0mm
BMS welding instruction  :
B + battery connected positive;
B1 the connection point between battery 1 and battery 2
B2 connect point between Battery 2 and Battery 3
B3 Connect the point between battery 3 and battery 4
Connection B to the negative end of the battery
P- + connection charge / positive discharge;
Connection charge P / negative discharge

Note :

1) This table is not suitable for high-power electronic tools, if it is used for screwdrivers and drills,
please do not buy.
2) By 3A Above the device, it means the battery discharge rate is more than 3C.
1C rated battery, 2000mah equals 2ah * 1 = 2A maximum operating current.

Nominal 3C battery means 2ahx3 = 6A maximum working current.

Package Included of BMS 4S 20A LI-ION :

1 x 4S 20A Li-ion Lithium 18650 Battery BMS PCM Protection PCB Board

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tutorial