#China #Beijing #Huawei Digital Power #Battery Systems #BESS Safety

Huawei Digital Power's Top-Rated Safety Assessment for BESS

Huawei Digital Power, in collaboration with leading industry partners, has recently excelled in a rigorous technical evaluation conducted by the China Electricity Council for its groundbreaking Battery Energy Storage Safety Quantitative Assessment System (BESS). This evaluation confirms that the system has reached a globally leading level and effectively addresses critical safety gaps within Battery Energy Storage Systems (BESS) both domestically in China and internationally.

Overview of the Evaluation Process

The evaluation committee featured esteemed members, including Professor Ouyang Minggao from Tsinghua University and Rao Hong, Chief Scientist at China Southern Power Grid, along with twelve other experts from various authoritative institutions. Huawei Digital Power presented its innovative safety assessment system alongside six other organizations. The committee scrutinized the project presentation, assessed documentation, and carried out rigorous investigations.

The panel unanimously acknowledged the innovative nature and practicality of the quantitative assessment system, stating, "This project innovatively establishes a quantitative safety evaluation system for the complete lifecycle of BESS, eliminating bottlenecks for safe operations in large-scale applications. It will create a universal model to assess the likelihood of safety risks, ultimately quantifying and scientifically evaluating the system's safety risks, thus bridging the technical gap in both China and worldwide."

Safety Risk Classification

The BESS safety assessment system classifies safety risks into three tiers: A (unacceptable), B (to be mitigated), and C (acceptable). Each tier specifies the required probabilities of failure:

• - Tier A indicates extremely high risks, indicating a severe likelihood of critical safety incidents.
• - Tier B involves high risks that necessitate continual product design optimization and the introduction of innovative technologies.
• - Tier C denotes controllable safety risks, where severe consequences such as fires can be effectively avoided.

Within the project framework, comprehensive safety risk evaluations of BESS were conducted using a quantitative assessment framework. This involved identifying significant risk factors and enhancing product safety through core technologies.

Four Core Safety Technologies

The project showcases four vital technologies that establish safety in battery systems:
1. Smart Active Safety Warning Technology: Employing a dual-decoder multifrequency hierarchical architecture, this technology enhances the operational condition coverage of fault warning algorithms, ensuring a recall rate of at least 95%.
2. Overpressure Oxygen Blockage and Directed Smoke Exhaust Architecture: This includes a high-security battery pack designed to withstand extreme pressures, heat, corrosion, and isolation protection, preventing ignition even during simultaneous thermal runaway of eight battery cells.
3. Intelligent String Energy Storage Double-Level Conversion Architecture: This innovation ensures no net current is fed back during transient voltage scenarios across the entire State of Charge (SOC) range, supporting stable power delivery essential for grid recovery.
4. High-Temperature Resistant Insulation and Real-Time Detection Technologies: These systems greatly mitigate the risk of arcing ignition due to insulation failures through real-time monitoring.

Practical Applications and Future Outlook

The outcomes of this innovative project have been integrated into large-scale initiatives across China and worldwide, such as the network-forming energy storage system in Tibet, Uzbekistan, and the 100% renewable energy microgrid project in Saudi Arabia.

Professor Ouyang Minggao emphasized that the methodology behind this assessment is groundbreaking and represents significant technological advancements important for enhancing safety across the BESS industry. According to him, this project has substantial economic and social implications, leading to ongoing advancements in energy storage safety technologies and creating a robust foundation for developing new power supply systems.

Steven Zhou, President of the Smart PV ESS Product Line at Huawei Digital Power, stated, "The coming years will be crucial for establishing solar, wind, and energy storage as dominant power sources. We urge industry players, regulatory bodies, associations, and standard organizations to collaborate on critical areas including standards development, technology exchange, and ecosystem building. We are committed to driving large-scale, standardized, and high-quality industry development alongside our partners, expediting the progression of solar and wind energy as primary sources, ultimately bridging the global energy divide and providing green, stable, and affordable power to everyone."

This development marks a significant milestone in advancing battery safety assessment technologies, promising a bright future for the energy storage sector as it strives towards greater security and efficiency.