Meaning
Inventory classification organizes electrochemical cells into specific sets based on performance characteristics. Cell sorting bins allow manufacturers to group large batches of cells into subsets with narrow ranges of capacity, internal resistance, open circuit voltage, and self-discharge rates. This process ensures that cells placed within the same module behave similarly over their operational life.
Parameter Matching
Voltage measurements taken after a stabilization period determine the initial placement of a unit. Using cell sorting bins reduces the imbalance between series strings, which improves the overall efficiency of the battery management system. Units that fall outside the specified limits are diverted to secondary applications or recycling.
Capacity Grading
Discharge tests provide the data needed to calculate the actual energy storage of every individual cell. Within the logic of cell sorting bins, a tight distribution of capacity prevents the weakest cell from limiting the performance of the entire pack. Testing software automatically assigns each cell to a specific bin code based on the discharge curve.
High volume manufacturing plants utilize automated robotic arms to place each cell into the physical location corresponding to its performance data.
Production Flow
Automated conveyors move the cells from the testing station to the physical storage racks. The use of cell sorting bins creates a buffer in the production line where components await assembly into modules. Higher precision in the sorting process typically leads to a longer cycle life for the final product.
