Cell manufacturing/EOL Testing

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{{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 |relations={{Semantic Link |property=HasPredecessor |value=Battery value chain/Process/Cell manufacturing/Aging }}{{Semantic Link |property=HasSuccessor |value=Battery_value_chain/Process/Module_manufacturing }} }}

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