QT-SBMU-70T40M5 is a slave control module for energy storage battery management system, which monitors the working status of batteries in the battery box in real time when the battery box is charging and discharging, detects and reports the voltage, temperature and other status of the battery box in real time, and alarms the undervoltage, overvoltage, undertemperature and overtemperature.This device is installed in the battery box. It can support up to 70 individual batteries in series and up to 45 channels of temperature sensing.