BMS 4S 18650 Lithium Battery Protection Board (40A-14.8v)

BMS 4S 18650 Lithium Battery Protection Board (40A-14.8v) is a high-quality electronic component designed for Arduino, prototyping, and educational electronics. 4S 40A Li-ion Lithium Battery 18650 Charger PCB BMS Protection Board with Balance For Drill Motor 14.8V 16.8V Lipo Cell Module

Specification:

Overcharge detection voltage: 4.28+ 0.05 V
Overcharging voltage: 4.2-4.3V
Over-discharge voltage: 2.5 ±0.08
Overcharge detection delay time 0.1s
Temperature range -40~85
Short circuit detection delay time: 100ms
Over-current detection delay time: 500 ms
Balanced current: 100mA
Working current: 40A
Overcurrent: 80A
Short circuit protection function: there is, disconnect the load can be self-recovery.
Size: 60 x 45 mm

Main function:

Overcharge protection, over-discharge protection function, short circuit protection function, over current protection function, balance.

Notes:

Strictly according to the diagram wiring: 0V(B-) 3.7V(B1) 7.4V(B2) 11.1V(B3) 14.8(B+), Do not deliberately short circuit.
After the wire is connected, it needs to charge the batteries first, then have output.
When the battery is connected in series with 3 groups, please ensure that the voltage of each battery is the same. If not the same, please fill in each set of batteries and then use them.
Do not mix the good battery and the battery.
It will be better the capacity of the battery internal resistance is closer. It’s perfect for DIY makers, students, and anyone building custom electronic circuits or STEM kits.