The battery management system (BMS) is installed in the energy storage battery pack, responsible for collecting information such as voltage, temperature, current, capacity, etc. of the energy storage battery pack, real-time status monitoring and fault analysis, and at the same time through the CAN bus and PCS, monitoring and dispatching The system communicates online to realize the optimal charging and discharging management control of the battery. Each cluster of battery packs in the system is equipped with a battery management system, which can achieve the purpose of effectively and efficiently using each cluster of energy storage batteries and overall rational deployment.

BMS has the functions of battery voltage equalization, battery pack protection, thermal management, analysis and diagnosis of battery performance, etc. It is required to be able to measure the battery module voltage, charge and discharge current, temperature, and the terminal voltage of the single battery in real time, and calculate the internal resistance of the battery and other parameters, and obtain the diagnosis of the current capacity or remaining capacity (SOC) of the single battery by analyzing the diagnostic model , the diagnosis of the state of health (SOH) of the cell, the evaluation of the state of the battery pack, and the estimation of the sustainable discharge time at the current state when discharging.