China launches world's first 628Ah ultra-large battery storage plant

China has launched the world’s first ultra-large battery storage plant utilizing 628-ampere-hour (Ah) mega battery cells, marking a significant milestone in grid-scale energy storage technology. Commissioned on January 31 in Lingshou, Hebei Province, the 200MW/400MWh facility demonstrates the practical application of these large-format lithium-ion cells, which are substantially bigger than conventional battery formats. Developed by EVE Energy, the project features 80 sets of 5MWh DC energy storage systems and 40 integrated power conversion cabins, showcasing the cells’ ability to meet stringent safety, efficiency, and lifespan requirements for modern electrical grids. The cumulative production of these cells has already exceeded one million units, indicating mature manufacturing capabilities and industrial scalability. The large-format battery technology offers advantages such as reduced component complexity, faster deployment, and lower operating costs due to fewer cells and simpler system architecture. EVE Energy’s design incorporates inherently safe cell technology, innovative stacking processes, and high-tough