Cell manufacturing/EOL Testing

{{GlossaryEntry}}
{{Semantic Element
|label=Cell manufacturing/EOL Testing
|description====Production process===

*After finalizing the cell production, cells are tested in an End-Of-Line (EOL) testing process
*Cells are transferred from their aging storage location to the testing station
*EOL testing process may include the following tests:
**Capacity measurements (i.e., discharge to state of charge (SOC) of transport),
**Pulse tests,
**Internal resistance measurements (DC),
**Optical inspections, 
**OCV tests,
**Leakage tests,
**...
*Sorting of cells according to EOL results (i.e., performance grading)
*Packaging and transportation to customer


===Process parameters & requirements===

*SOC for transportation: 5 % - 20 % SOC
*Permissible loss rate: < 5 mV per week
*Increased loss rate: > 5mV per week may indicate e.g. cell-internal short circuits

===Technology alternatives===

*Different test sequences and durations

===Quality influences===

*Cell handling

===Quality characteristics===

*Low self-discharge
*Low internal resistance
*Constant capacity

===Source===
Heimes, H.H.; Kampker, A.; Lienemann, C.; Locke, M.; Offermanns, C.; Michaelis, S.; Rahimzei, E. (2018) ''Lithium-Ion Battery Cell Production Process''; PEM of RWTH Aachen and VDMA, 3rd Edition, ISBN:978-3-947920-03-7
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|value=Battery value chain/Process/Cell manufacturing/Aging
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|value=Battery_value_chain/Process/Module_manufacturing
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}}