Sort to weld

18650 pack line

A working sequence for cylindrical pack production: sort cells by voltage and resistance, paste insulation rings, weld the strip, then inspect the spots before assembly.

Project constraints

01
Parallel groups drift when cells are picked from mixed voltage and resistance batches.
02
Manual insulation ring pasting is the slowest step before welding and is often skipped under time pressure.
03
A missing weld is usually found at pack test, after the strip has already been cut and fitted.

Solution composition

Cell grading

The HFX65-10 sorter measures open-circuit voltage and internal resistance, then grades each cell into ten bins so parallel groups are built inside a defined window.

Preparation

Barley paper rings are pasted automatically before welding, protecting the cell can and removing the hand step that delays the bench.

Welding and inspection

Bench welders or the HDL6030B automatic welder run stored schedules per pack layout, with the AWT-CD-20 checking polarity and weld spot presence afterwards.