4S 20A Square 14.8V 16.8V BMS Battery Management System PCM PCB for 4 Series 18650 li-ion Lithium Ion Battery Pack

Description:

   This board is not suitable for high power electronic tools, like screwdriver and drill. above 3a device, means the battery discharge rate is more than 3c. 1c rated, 2000mah equals 2ah*1=2a max working current. 3c rated means 2ahx3=6a max working Current.

Features:

• High-accuracy voltage detection circuit; terminal of the charger using high voltage device; built-in three-stage over-current detection circuit (over-current 1, over-Current 2, or load short circuit); MOS transistor can control the battery charge and discharge; low standby current consumption.

• 4s Li-ion BMS parameters:

• overcharge voltage:4.25-4.35v ±0.05v

• over-discharge voltage: 2.3-3.0V 0.05v

• max working Current:10a

• max peak current:20A

• working temperature:-40---+50°C

• storage temperature:-40-- +80°C

• small Current:6ua

• life cycle:50000 hours

• resistance:45m

• shortcut protection: yes, change for repair

• size:35*35*3.0mm

BMS solder instruction:

b+ connected battery positive; b1 the connect point between Battery 1 and Battery 2 b2 connect the point between Battery2 and battery 3 b3 connect the point between Battery 3 and Battery 4 b- connect to Battery negative end p- + connection charge/discharge positive; p- connection charge/discharge negative 4sLi-ion 18650, licoo2, limn2o4, li(NiCoMn)o2   rechargeable batteries 4s lipo rechargeable batteries.

Specification:

• Charging voltage range:: 16.8V

• Over-discharge recovery voltage: 2.5v ± 0.05v, over-discharge-delay-time: 144ms

• Maximum Peak current: 20A, Maximum Working current: 10A, Static current: less than 8uA

• Resistance: less than 4mΩ; 4 series 18650 battery 16.8V 16V 14.8V 14.8V (Li-ion 18650 or li-ion battery rated voltage) 16.8V (Li-ion battery full charge voltage) 14.4V ( Lipo battery pack rated voltage)

• Short circuit protection: protect and automatic recovery, Over discharge protection: yes, over-current-protection: yes