Method of manufacturing pouch-shaped battery cell comprising jig grading

The patent applies parameter changes by controlling the charging and discharging rates during the formation process. Specifically, it uses a multi-stage charging protocol with different current rates (e.g., 0.05C, 0.1C, 0.2C) and voltage cutoffs to gradually activate the silicon-based electrode material. This controlled parameter variation reduces mechanical stress and volume expansion during initial cycles, thereby improving cycle stability while maintaining high capacity.

The patent implements preliminary action by performing a controlled formation process before the battery enters normal operation. The formation process includes gradual charging stages with increasing current rates and specific voltage cutoffs (e.g., 4.2V, 4.35V, 4.4V) to pre-condition the electrode materials. This preliminary activation under controlled conditions prevents excessive deformation and reduces defect rates in subsequent manufacturing and operation.

The patent applies continuity of useful action by implementing an extended formation process with multiple charging and discharging cycles. Instead of a single brief electrolyte impregnation step, the battery undergoes continuous formation cycles (e.g., 3-7 cycles) with gradual current increases and specific voltage thresholds. This continuous activation process ensures thorough electrolyte penetration and electrode material activation, significantly improving lifespan characteristics while maintaining manufacturing feasibility.