Technical Specifications for Underground Energy Storage Systems

This document specifies the technical requirements, safety requirements, testing and inspection, marking, packaging, transportation, operation and maintenance of underground energy storage systems with rated energy of 5 kWh or more. It covers environmental requirements, structural and electrical design, decentralized architecture, and distributed intelligent energy management (DIEM). Safety provisions include general safety, installation specifications, and compliance with standards such as GB/T 4208 for enclosure protection and GB/T 34131 for battery management systems. The document also details test methods, inspection rules, and guidelines for logo, packaging, transportation, storage, and maintenance. It applies to the design, manufacturing, inspection, and operation of underground energy storage systems, referencing standards for lightning protection, corrosion, and pressure vessels. Key components include underground batteries and DC networking for local power distribution.