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| | {{Semantic Element | | {{Semantic Element |
| | |label=Cell manufacturing/Aging | | |label=Cell manufacturing/Aging |
| − | |description===Production process== | + | |description= |
| | + | ====Production process==== |
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| − | *Aging represents the final step in cell production and is used for quality assurance. | + | *Final step in cell production |
| − | *During aging, cell characteristics and cell performance are monitored by regularly measuring the open circuit voltage (OCV) of the cell over a period of up to three weeks. | + | *Process aims at for quality assurance |
| − | *A distinction is made between high temperature (HT) and normal temperature (NT) aging. The cells usually first undergo HT aging and then NT aging. | + | *Cell characteristics performance are monitored over a period of up to three weeks: Regular measurment of open circuit voltage (OCV) |
| − | *The cells are stored in so-called aging shelves and/or towers. | + | *Aging differentiation: High temperature (HT) and normal temperature (NT) aging; usual againg sequence: first, HT aging and, then, NT aging |
| − | *No significant change in the cell properties over the entire period of time means that the cell is fully functional and can be delivered to the customer. | + | *Storage in so-called aging shelves and/or towers |
| − | *In contrast to formation, the pouch cells are no longer pressurised in this process step. | + | *Quality assurance: No significant change in the cell properties over the entire period of time |
| − | *The duration of the aging process depends strongly on the respective cell manufacturer and the cell chemistry used.
| + | *Aging duration depends strongly on cell manufacturer and used chemistry |
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| − | ==Process parameters & requirements== | + | ====Process parameters & requirements==== |
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| | *State of charge of the cell at the beginning of aging: 80 % - 100 % SOC | | *State of charge of the cell at the beginning of aging: 80 % - 100 % SOC |
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| | *Normal temperature approx. 22°C, high temperature approx. 30°C - 50°C | | *Normal temperature approx. 22°C, high temperature approx. 30°C - 50°C |
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| − | ==Technology alternatives== | + | ====Technology alternatives==== |
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| − | *There are different procedures for the sequence and duration of HT and NT aging depending on the cell manufacturer and cell chemistry. | + | *Different procedures for sequence and duration of HT and NT aging (depending on cell manufacturer chemistry). |
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| − | ==Quality influences== | + | ====Quality influences==== |
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| | *Orientation of cells | | *Orientation of cells |
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| | *Ambient temperature | | *Ambient temperature |
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| − | ==Quality features== | + | ====Quality features==== |
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| | *Capacity | | *Capacity |
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| | *Self-discharge rate | | *Self-discharge rate |
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| − | ==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 |