SMT-S05S15M-SMTV1.5 is a BMS used in energy storage backup battery according to customer requirements. The BMS can support 5 series of lithium titanate batteries. This scheme adopts MCU scheme, which can realize the basic protection function, and can accurately estimate and display the remaining capacity of the battery; BMS has RS485 communication interface, which can report the real-time data of the battery, and BMS has 5W slow charging function.