How to prevent energy storage safety?

How to prevent energy storage safety? At present, the energy management system (Energy Management System, EMS) of lithium battery energy storage power station is responsible for managing the energy interaction of the power station. BMS controls the charge and discharge of all lithium battery cells and internal balance. The following characteristics are common: 1. BMS charge and discharge of lithium batteries The initial setting of the control threshold cannot be changed; 2. After the aging of the lithium battery, there is a deviation in the estimation of the battery state. The original BMS control threshold may slightly overcharge and overdischarge the battery cell with the most aging each time it is charged and discharged, and the battery is inconsistent The weakest battery has the worst loss of active lithium ions or the formation of micro-lithium dendrites every time, accelerating its aging process; the power lithium ion battery laboratory of Shanghai University of Engineering Lithium batteries have undergone a series of performance and endurance tests from battery cells (cells), battery modules to battery stacks, especially the full life cycle and experiments on decommissioned lithium batteries. Through the charging and discharging curve of lithium batteries from abnormal to Research on changes in symptoms when approaching the end of life, established a number of detection methods and diagnostic algorithms for battery characteristic values u200bu200bincluding internal resistance, and developed a battery doctor who is suitable for rapid detection, analysis and evaluation during operation, which can quickly troubleshoot High-voltage safety hazards, locate the problem battery unit and form an analysis and recommendation report. Combined with the one-click analysis of the big data of Shanghai New Energy Vehicle Monitoring Center, Shanghai MAKESENS (MS Energy Storage) has developed a cloud-side integrated preventive diagnostic security system based on cloud-native edge technology. (PrognosticSafetySystem, PSS), an intelligent communication management machine iRouter obtains the battery charge and discharge data at the cell level in real time from the energy management system (EnergyManagementSystem, EMS) of the energy storage station, introduces, calculates, diagnoses and uploads it to the diagnosis cloud; diagnosis According to the data flow of key battery parameters, Cloud establishes a prediction model of its development trend and constant false alarm threshold, forming a multi-parameter virtual radar system; when the actual monitoring data exceeds the threshold, it issues an early warning and proposes to return the key parameters to the threshold. The executable measures in the EMS include replacing and balancing the battery, or updating the control parameters in the iRouter configuration file as the basis for the EMS to update the dynamic control strategy of the BMS. How to manage energy storage safety We believe that the safety of energy storage should not only be the inspection and testing of various energy storage equipment before the power station is put into operation, especially the safety of energy storage batteries. Since the energy storage battery is a gradual electrochemical system, as the energy storage battery ages, the various parameters of the battery will also change accordingly. Through the preventive diagnosis safety system PSS, the potential risk of the energy storage battery can be predicted. Equipment manufacturers, power station operators, centralized control centers, and service providers provide the latest battery data analysis and diagnosis support in terms of spare parts optimization, power station operation management, remote expert professional technical support, and inspection team to achieve multiple safety protections and rapid emergency response Service, the effect of intelligent operation and maintenance. At present, the grid-side energy storage system is preparing to build an intelligent integrated operation and inspection combining online and offline. Real-time diagnosis and analysis of battery health status through the online cloud brain system; combined with the scheduled inspection plan, line content, and inspection point inspections scheduled by offline inspectors, flexibly dispatched, and timely report defects to achieve 7*24 Active real-time monitoring within hours, eliminating the blind areas of paper-based records and information collection, and changing mechanical operation and maintenance into active and flexible operation and maintenance. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: How to maintain the battery of a newly purchased electric car?