Core Insights - The project "Key Technologies and Applications for Fault Diagnosis and Protection of Lithium Battery Energy Storage Stations" has achieved international leading standards in technology [1][2] - The project addresses three major technical challenges in the safe operation of lithium battery energy storage stations: difficulty in locating external short-circuit faults, difficulty in early warning of internal short-circuit faults, and difficulty in covering multi-level protection [1] Group 1: Project Achievements - The project has developed a fault diagnosis and protection system for lithium battery energy storage stations, significantly improving operation and maintenance efficiency [2] - More than 10 invention patents have been authorized, over 20 papers published, and 4 standards released as part of the project [1] - The technologies have been applied in multiple energy storage projects across different sectors in Tianjin, reducing the risk of disasters such as fires and explosions [1] Group 2: Technical Innovations - The project has invented methods for identifying internal short-circuit faults and thermal runaway prevention based on voltage comparison, improved principal component analysis, and abnormal energy loss [1] - An online early warning system, an online safety assessment platform, and a direct current side protection device for lithium battery energy storage stations have been developed [1]