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| − | {{Semantic Element | + | {{GlossaryEntry}}{{Semantic Element |
| | |label=Cell manufacturing/EOL Testing | | |label=Cell manufacturing/EOL Testing |
| − | |description===Production process== | + | |description= |
| | + | ===Production process=== |
| | | | |
| − | *Before the cells leave the factory, they are tested in an EOL test rig. | + | *After finalizing the cell production, cells are tested in an End-Of-Line (EOL) testing process |
| − | *The cells are removed from the good carriers in the aging racks and fed to the testing station. | + | *Cells are transferred from their aging storage location to the testing station |
| − | *Here they are discharged to the shipping state of charge (capacity measurement). | + | *EOL testing process may include the following tests: |
| − | *Depending on the manufacturer, pulse tests, internal resistance measurements (DC), optical inspections, OCV tests and leakage tests are carried out. | + | **Capacity measurements (i.e., discharge to state of charge (SOC) of transport), |
| − | *After testing, many cell manufacturers sort the cells according to their performance data (grading). | + | **Pulse tests, |
| − | *Once the tests have been completed passed successfully, the cells can be packed and shipped. | + | **Internal resistance measurements (DC), |
| − | *For transport, the cells are usually provided with a plastic cover and stacked in a cardboard box.
| + | **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==
| |
| | | | |
| − | *State of charge of the cell for shipping: 5 % - 20 % SOC | + | ===Process parameters & requirements=== |
| | + | |
| | + | *SOC for transportation: 5 % - 20 % SOC |
| | *Permissible loss rate: < 5 mV per week | | *Permissible loss rate: < 5 mV per week |
| | *Increased loss rate: > 5mV per week may indicate e.g. cell-internal short circuits | | *Increased loss rate: > 5mV per week may indicate e.g. cell-internal short circuits |
| | | | |
| − | ==Technology alternatives== | + | ===Technology alternatives=== |
| | | | |
| − | *Different test sequences and durations exist depending on the cell manufacturer. | + | *Different test sequences and durations |
| | | | |
| − | ==Quality influences== | + | ===Quality influences=== |
| | | | |
| | *Cell handling | | *Cell handling |
| | | | |
| − | ==Quality characteristics== | + | ===Quality characteristics=== |
| | | | |
| | *Low self-discharge | | *Low self-discharge |
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| | *Constant capacity | | *Constant capacity |
| | | | |
| − | ==Source== | + | ===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 | | 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 | | |relations={{Semantic Link |
| | |property=Has predecessor | | |property=Has predecessor |
