1.1 Cell Loading, Inspection & Sorting

Cell loading is the first step in cell preparation, where individual cells are removed from their shipping containers (e.g., trays, boxes) and carefully introduced onto the automated production line or into specific fixtures. This process demands gentle handling to prevent any mechanical damage to the cells, such as scratches, dents, or stress on terminals, especially for delicate pouch cells. Modern lines often use robotic arms with specialized grippers and vision systems for precise and efficient loading.

 The cell sorting process includes measurements of Open Circuit Voltage (OCV) and Internal Resistance (ACIR or DCIR), and sometimes capacity or weight. The sorting machine uses these measurements to grade each cell according to defined ranges. These measurements ensure that cells with very similar properties are grouped together for assembly into the same module. In other words, cells are automatically grouped or "binned" with others that have very similar performance characteristics.