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6S 40A 18650 Lithium Battery Protection Board

572.00 + GST

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BMS (Battery Management System) a battery management system that is designed to monitor the status of batteries, control the process of charging/discharging the battery, etc.

Six batteries (18650) can be connected simultaneously to this charge-discharge controller module. The module has protection against short circuit, overcharge and over-discharge. One of the functions of the charge controller is to turn off the power supply for the batteries when the maximum capacity of at least one battery is reached. This BMS controller is designed for more than 30,000 hours of operation. The maximum allowable current is 40 A.

If the maximum permissible value of the supply voltage is exceeded, the charge controller activates the protection mode. In order to restore the module, it is necessary to re-apply voltage to the input of the BMS board or wait a while until the charge controller automatically disables protection.


  • Small size designed for a four-cell battery pack.
  • Simple and convenient circuit for easy connections
  • Over-charge/Over-discharge Protection.


Working current ≤40uA
Maximum Discharge Current 40A
Instantaneous Discharge Current 70A
Charging voltage 25.5V
Maximum charging current 40A
Temperature range -30/+80°C
Overcharge detection voltage 4.25±0.025V
Overcharge release voltage 4.15±0.05V
Battery Balance Detection Voltage: 4.125±0.025V
Over discharge detection voltage 2.7±0.1V
Over discharge Detection Delay 1.0±0.5S
Over discharge release voltage 3.0±0.1V
Overcurrent detection voltage 100mV
Overcurrent Detection Delay 1±0.3S
Overcurrent protection current 75±5A
Weight (gm) 15
Length (mm) 98.2
Width (mm) 34.5

* product image for illustration purposes only. actual product may vary.


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