钠电池的分容工艺是什么？

What is the grading process for sodium-ion batteries?

分容是化成完成后的标准化充放电检测分级工序，在高精度分容柜执行完整充放电循环，精准标定每颗电芯实际容量、静态电压、交流内阻、自放电速率，按照性能参数划分 A/B/C 档位。完整流程：电芯恒温静置、标准 0.2C 充放电循环、数据采集、系统自动对比标准阈值分级、不良品隔离剔除。PACK 模组组装要求同一模组仅装配同档位电芯，混用不同容量、内阻电芯会导致充放电同步性差，短板电芯提前衰减报废，整包使用寿命大幅缩短。分容是保障储能模组一致性核心前置工序，大容量储能电站对分容档位公差管控极为严苛，压差阈值控制在极小范围，避免电站调频收益受损。分容数据永久存档，售后电芯故障可溯源制造批次与性能参数，便于产线工艺迭代优化。

Grading is a standardized charge-discharge testing and classification procedure after formation. Complete cycling is conducted on high-precision grading cabinets to accurately calibrate actual capacity, static voltage, AC internal resistance and self-discharge rate of each cell, and cells are classified into grades A/B/C according to performance parameters. The complete flow includes constant-temperature cell standing, standard 0.2C charge-discharge cycles, data collection, automatic classification by system comparison with standard thresholds and isolation & rejection of defective products. PACK module assembly requires only cells of the same grade to be assembled in one module. Mixing cells with different capacity and resistance leads to poor charging & discharging synchronization, premature fading of inferior cells and drastically shortened whole pack service life. Grading is the core pre-procedure guaranteeing energy storage module consistency. Large-capacity energy storage power stations impose extremely strict control over grade tolerance with tiny voltage difference thresholds to avoid loss of power station frequency regulation revenue. Grading data is permanently archived, and post-sales cell failures can trace manufacturing batches and performance parameters to facilitate iterative optimization of production processes.