BMS controller for 2 Li-Ion batteries 18650 HX-2S-A2 5A 7.4V

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

Two batteries (18650) can be connected to the charge-discharge controller module HX-2S-A2 at the same time. The features of this charge controller are: protection against short circuit (short circuit) and protection against overdischarge (overcharge). Also, a feature of the module is to turn off the power supply for the batteries when the maximum capacity of at least one battery is reached. The maximum operating current of this BMS controller is 5 A, and the quiescent current does not exceed 10 μA. The battery charge is turned off when the voltage reaches 4.25 - 4.35 V, and the discharge occurs when the voltage drops to 2.5 - 3.0 V.

The battery charge-discharge controller module HX-2S-S01 has 5 outputs:

B+: battery positive
B-: battery negative
BM: battery assembly midpoint
P-: charge/discharge negative terminal
P+ charge/discharge positive terminal

When the maximum allowable value of the supply voltage is exceeded, the charge controller activates the "protection" mode. In order to restore the operation of the module, it is necessary to reapply voltage to the BMS board input or wait for some time until the charge controller turns off the protection automatically.

The module supply voltage range is from 8.4 to 9 V. Please note that this module is not a charger!

Model HX-2S-A2
Maximum battery charge voltage, V 4.25 ... 4.35
Battery discharge voltage, V 2.5 ... 3.0
Supply voltage, V 8.4 ... 9
Operating current, A 5
Maximum operating current, A 7
Module dimensions, mm 17.5 x 17.5 x 3.2.