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| | {{Semantic Element | | {{Semantic Element |
| | |label=Cell manufacturing/Vacuum Drying | | |label=Cell manufacturing/Vacuum Drying |
| − | |description===Production process== | + | |description= |
| | + | ===Production process=== |
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| − | *The coated daughter rolls are pushed onto a special goods carrier. | + | *Stacks are stored in a vacuum oven |
| − | *The coils are then stored in a vacuum oven.
| + | *During the drying process, residual moisture and solvents are removed from the electrodes, resp., stacks |
| − | *The drying time is approx. 12 h to 30 h. During the drying process, residual moisture and solvents are removed from the coils. | + | *Reduction of residual moisture is achieved by evaporation at low temperatures as a result of a low total pressure |
| − | *The reduction of residual moisture is achieved by evaporation at low temperatures as a result of a low total pressure. | + | *After vacuum drying, stacks are transferred directly to the dry room or dry packed under vacuum |
| − | *After vacuum drying has been completed, the coils are transferred directly to the dry room or dry packed under vacuum. | + | *Vacuum ovens can be operated with inert gas in order to prevent corrosion. |
| − | *The vacuum ovens are often used as air locks into the dry room (for daughter rolls). | |
| − | *In addition, it is possible to operate the vacuum ovens with inert gas in order to prevent corrosion.
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| − | ==Process parameters & requirements== | + | ===Process parameters & requirements=== |
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| | *Working pressure: 0.07 mbar < p < 1000 mbar | | *Working pressure: 0.07 mbar < p < 1000 mbar |
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| | *Inert gas supply | | *Inert gas supply |
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| − | ==Technology alternatives== | + | ===Quality influences=== |
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| − | *Continuous dryers: In contrast to the chamber concept, there are also continuous drying processes in which the daughter rolls are transported through a long drying facility in a wound or unwound state.
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| − | *Infrared dryer: Both technologies can be supplemented by infrared heating.
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| − | ==Quality influences== | |
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| | *Constant heat supply and stable vacuum | | *Constant heat supply and stable vacuum |
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| | *Inert gas supply against corrosion | | *Inert gas supply against corrosion |
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| − | ==Quality features== | + | ===Quality features=== |
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| | *Surface condition (cracks, etc.) | | *Surface condition (cracks, etc.) |
| | *Residual moisture content (no residual moisture desired) | | *Residual moisture content (no residual moisture desired) |
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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 |
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| | |relations={{Semantic Link | | |relations={{Semantic Link |
| | |property=Has predecessor | | |property=Has predecessor |