As global competition intensifies in the battery consumer market, manufacturers face growing pressure to deliver higher quality consistency alongside significant cost-performance improvements. In response, EVE Energy Jingmen deployed over 40 digital solutions, applying AIoT, simulation, LLMs, and AI across operations. These systems enabled real-time quality diagnosis, process self-optimization and predictive maintenance, leading to significant performance gains, including reducing the defect rate by 52%, lowering unit conversion costs by 41% and boosting average overall equipment effectiveness (OEE) to 88%.