Important Steps Prior to Battery Assembly——Cell Sorting.
What is cell sorting?
Sorting refers to judging the battery according to the quality data such as OCV, DCIR, K value, capacity, etc., and distinguishing the battery according to the grade of the result. Generally, batteries of the same grade are placed in the same tray.
Why do lithium batteries need to be sorted before assembling modules?
When assembling the cells of the battery, it is necessary to ensure the consistency of the battery.
If the voltage and internal resistance are inconsistent or the difference is relatively large, it will affect the service life of the entire battery pack. If the capacities of the batteries are inconsistent, the capacity of the battery pack and charge and discharge will be determined by the cells with the smaller capacity, resulting in capacity loss.