This product is suitable for battery packs with 5-400S of monomer voltage 2V-5V and can provide protection and recovery functions for the battery pack, such as over-voltage, under-voltage, over-current, high temperature, low temperature, and short circuit. Achieve accurate measurement of SOC during charge and discharge, and statistics of SOH health status. Support active balance and passive balance function to help prolong battery life. Through the human-computer interaction of the upper computer software, it can display and set alarm protection parameters such as voltage, current, temperature, etc., display the real-time data of the battery's operating status, and read and save the historical data of the battery. It’s with a variety of sleep and wake-up methods. Data communication with the host is realized through RS485 and realize human-computer interaction for parameter configuration and data monitoring through the host computer software. The battery pack equipped with this battery management system can be widely used in indoor and outdoor communication base stations as backup batteries and can also be used as a basic module for household energy storage to play its functions and roles in the field of energy storage applications