When a module underperforms, can you see which cells went into it?

Cells are sorted into bins by current. A module built from mismatched cells performs below its rating, and the loss is permanent.

Binning happens. Which bin went into which module is rarely recorded, so when flash test results disappoint there is nothing to look back at.

Cell bin, string and operator attach to the module, so a flash result points back to what went in.

Lamination is the operation that scraps a whole module rather than a component. Temperature, pressure and time all matter.

Cycles are set and trusted. Nobody records the parameters against the batch, so a drifting laminator is found by the failures rather than by the numbers.

Cycle parameters are recorded per batch, so a drift is visible before it becomes a month of scrap.

You warrant a module for decades. A claim arrives years later with a serial number.

You need the cell lot, the laminator, the flash result and the operator. If that was on paper, it is effectively gone, and you settle the claim without knowing whether anything else is affected.

Everything attaches to the serial at the moment it is built and stays queryable for as long as you need it.