BMS 4S (16.8V 20A ) Lithium Battery Protection Module

BMS 4S (16.8V 20A ) Lithium Battery Protection Module is a high-quality electronic component designed for Arduino, prototyping, and educational electronics.

High-accuracy voltage detection circuit
Terminal of the charger using high voltage device
Built-in three-stage over-current detection circuit
Can control the battery charge and over-discharge
Low standby current consumption
Small size
Simple writing, circuit connection, and installation

Specifications:

Overcharge voltage range: 4.25V-4.35V±0.05V
Over discharge voltage range: 2.3V-3.0V±0.05V
Charging voltage: 16.8V to 17V
Upper limit working current: 10A
Upper limit instantaneous current: 20A
Quiescent current: <30µA
Internal resistance: 45mΩ
Operating temperature range: -50℃ to +50℃
Storage temperature range: -50℃ to +80℃

BMS Solder Instruction:

B+: connected battery positive
B1: 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
P+: connection charge / discharge positive
P-: connection charge / discharge negative

It’s perfect for DIY makers, students, and anyone building custom electronic circuits or STEM kits.