What are the requirements for the BMS functions of large-scale energy storage lithium batteries?

1) The energy storage lithium battery BMS has an analog measurement function: it can measure the voltage and temperature of the cell in real time, and measure the voltage and current of the battery pack. Ensure the safe, reliable and stable operation of the battery, ensure the service life of the single battery, and meet the optimization control requirements for the operation of the single battery and battery pack. 2) Energy storage lithium battery BMS has online SOC diagnosis: based on real-time data collection, an expert mathematical decomposition diagnosis model is established to measure the remaining battery SOC online. At the same time, it intelligently corrects the SOC prediction based on the battery's discharge current and ambient temperature, and provides a more consistent battery remaining capacity and reliable use time under changing loads. 3) Battery system operation alarm function: when the battery system is running overvoltage, undervoltage, overcurrent, high temperature, low temperature, abnormal communication, abnormal BMS, etc., it can display and report alarm information. 4) Battery system protection function: The high voltage control unit is used for abnormal battery faults such as severe overvoltage, undervoltage, and overcurrent (short circuit) that may occur during operation. It can quickly cut off the battery circuit, isolate the fault point, and output sound and light alarm information in time to ensure the safe and reliable operation of the system. For timely and reliable protection, the energy storage system reserves 2 hard nodes. When the BMS tests that the battery system reaches the protection limit, the BMS sends the protection limit value to the PCS through the dry node, prohibiting charging and discharging. 5) The energy storage lithium battery BMS has a communication function: the system can communicate with PCS via CAN, the communication protocol supports the Ankerui PCS communication protocol, and the background uses RS485 for communication, and the communication protocol is the standard Modbus protocol. 6) Thermal management function: Strictly monitor the operating temperature of the battery pack. If the temperature is higher or lower than the protection value, the battery management system will automatically cut off the battery circuit to ensure system safety. 7) Energy storage lithium battery BMS has self-diagnosis and fault-tolerant functions: The battery management system adopts advanced self-diagnosis and fault-tolerant technology, and has self-checking function for the module's own software and hardware. Even if internal faults or even device damage, it will not affect the battery Safe operation. The failure of the battery management system will not cause the energy storage system to fail, or even cause battery damage or vicious accidents. 8) The energy storage lithium battery BMS has a self-diagnostic function, which can self-diagnose the failure of the BMS to communicate with the outside world, the internal communication of the BMS, the abnormal analog data collection and other faults, and can report to the system. 9) Balance function: passive balance, the maximum balance current is 200mA. 10) Operation parameter setting function: BMS operation parameters should be able to be modified remotely or locally in the BMS or energy storage station monitoring system, and some parameter modifications require password confirmation. 11) Local operating status display function: BMS can display various operating status of the battery system locally, such as system status, analog information, alarm and protection information, etc. 12) Energy storage lithium battery BMS has event and log data recording function: BMS can store a certain amount of 10,000 events and log data of the battery system locally. Disclaimer: Some pictures and content of articles published on this site are from the Internet, if there is any infringement, please contact to delete. Previous: Analysis of the correct use and repair methods of lithium batteries