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Battery value chain/Process/Cell manufacturing/EOL Testing (view source)
Revision as of 12:06, 15 June 2021
, 12:06, 15 June 2021Created page with "{{Semantic Element |label=Cell manufacturing/EOL Testing |description===Production process== *Before the cells leave the factory, they are tested in an EOL test rig. *The..."
{{Semantic Element
|label=Cell manufacturing/EOL Testing
|description===Production process==
*Before the cells leave the factory, they are tested in an EOL test rig.
*The cells are removed from the good carriers in the aging racks and fed to the testing station.
*Here they are discharged to the shipping state of charge (capacity measurement).
*Depending on the manufacturer, pulse tests, internal resistance measurements (DC), optical inspections, OCV tests and leakage tests are carried out.
*After testing, many cell manufacturers sort the cells according to their performance data (grading).
*Once the tests have been completed passed successfully, the cells can be packed and shipped.
*For transport, the cells are usually provided with a plastic cover and stacked in a cardboard box.
==Process parameters & requirements==
*State of charge of the cell for shipping: 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 exist depending on the cell manufacturer.
==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=Has predecessor
|value=Battery value chain/Process/Cell manufacturing/Aging
}}
}}
|label=Cell manufacturing/EOL Testing
|description===Production process==
*Before the cells leave the factory, they are tested in an EOL test rig.
*The cells are removed from the good carriers in the aging racks and fed to the testing station.
*Here they are discharged to the shipping state of charge (capacity measurement).
*Depending on the manufacturer, pulse tests, internal resistance measurements (DC), optical inspections, OCV tests and leakage tests are carried out.
*After testing, many cell manufacturers sort the cells according to their performance data (grading).
*Once the tests have been completed passed successfully, the cells can be packed and shipped.
*For transport, the cells are usually provided with a plastic cover and stacked in a cardboard box.
==Process parameters & requirements==
*State of charge of the cell for shipping: 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 exist depending on the cell manufacturer.
==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=Has predecessor
|value=Battery value chain/Process/Cell manufacturing/Aging
}}
}}
