China's computing and measuring instrument industry

The integration of China's computing and measuring instrument industry and energy storage industry is driven by three pillars: high-precision sensing, intelligent diagnosis, and mandatory standardization, driving energy storage systems from 'extensive operation' to 'digital twin precision control'. High precision sensors become the core sensing unit, and flux gate current sensors (with an accuracy of 0.01%) are embedded in BMS and PCS systems to achieve μ A leakage current monitoring and real-time feedback of bidirectional current, compressing SOC estimation errors to<1% and significantly extending battery life; Fiber Bragg grating sensors (such as Huawei patent CN121748604A) can sense micro deformation of battery cells, improving the sensitivity of identifying thermal runaway precursors. The intelligent monitoring platform realizes large-scale AI operation and maintenance, and the Southern Power Grid energy storage AI analysis platform connects 2.38 million measurement points, relying on 28000 algorithm modules to achieve millisecond level status diagnosis, reducing the failure rate by 34% and increasing the consumption of new energy by 30%. The standard system is strongly enforced, and from August 1, 2025, GB 44240-2024 'Safety Requirements for Lithium ion Batteries and Battery Packs for Electric Energy Storage Systems' will be implemented, covering 23 rigorous tests (such as shallow puncture and forced discharge), forcing measurement equipment to achieve closed-loop data collection at the cell level throughout the entire chain. CATL has established the world's first UL9540A accredited witness laboratory, equipped with a 6MW ultra large charge and discharge testing system, and built an integrated capability of 'testing verification certification', promoting the domestic substitution rate of domestic measuring instruments in high-end energy storage scenarios to exceed 90%. Measuring instruments have evolved from 'auxiliary tools' to the 'nerve endings' and 'decision-making basis' of energy storage systems.