Pass/Fail Checks for a Battery Formation and Capacity Grading System FAT
A buyer's guide to defining practical factory acceptance test criteria for a battery formation and capacity grading system, from channel checks to regenerative power behavior.
Decide before the factory acceptance test which pass/fail checks will release payment, and write them into the purchase order. A practical starting point is channel-level verification: confirm that every channel can charge, discharge, and record data for the cylindrical formats you intend to run, whether 18650, 21700, 26650, or 32650. Ask the supplier to demonstrate a defined sample of channels, not just one, and to show how a failed channel is identified and isolated.
For capacity grading, agree on reference cells with known values and set acceptance bands for measured capacity and voltage. Define how repeatability is judged: run the same cells twice and compare results against a tolerance you specify. For the regenerative DC/AC architecture, ask for a demonstration of energy recovery behavior and how the system responds to a simulated grid or load fault. For air cooling, confirm temperature monitoring points and alarm thresholds during a sustained run.
Before requesting a quote, confirm with the supplier which checks they will perform at the factory, what reference cells and test records they will provide, how channel count and format handling are verified, and what acceptance criteria they propose for capacity, repeatability, regeneration, and cooling alarms.