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. Two batteries (18650) can be connected simultaneously to the HX-2S-D20 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 20 A. The HX-2S-D20 BMS module has 5 pins: B : Battery positive pole B- : Battery negative pole BM : Mid-point of a battery assembly P- : Negative charge / discharge terminal P :Positive charge/discharge terminal 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. Power is supplied to the module from an external power source. The voltage range of the module is from 7.4 to 8.4 V. For charging, you can use a step-up voltage converter with a current limiter. Please note that this module is not a charger. Features: Small size designed for a four-cell battery pack. Simple and convenient circuit for easy connections Over-charge/Over-discharge Protection. Specifications: Model HX-2S-D20 Over Charge Voltage Range 4.25-4.35V 0.05V Over Voltage Range 2.5-3.0V 0.05V Max. Operating Current 13A Max. Limiting Current 20A Charging Voltage 8.4-9V Quiescent Current Lower than 10µA Internal Resistance <300 Ohm Operating Temperature -40°C to 50°C Length 44.77mm Width 18.85mm Height 3.5mm Weight 4 gm Package Includes: 1 x 2S 20A 18650 Lithium Battery Protection Board. *Product Images are shown for illustrative purposes only and may differ from actual product.
