Cell manufacturing/Vacuum Drying

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|label=Cell manufacturing/Vacuum Drying
|description=
===Production process===

*Stacks are stored in a vacuum oven
*During the drying process, residual moisture and solvents are removed from the electrodes, resp., stacks
*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
*Vacuum ovens can be operated with inert gas in order to prevent corrosion.

===Process parameters & requirements===

*Working pressure: 0.07 mbar < p < 1000 mbar
*Drying time: 12 h - 30 h per batch
*Drying temperature: 60°C - 150°C
*Inert gas supply

===Quality influences===

*Constant heat supply and stable vacuum
*Longer resting times only possible in the dry room
*Inert gas supply against corrosion

===Quality features===

*Surface condition (cracks, etc.)
*Residual moisture content (no residual moisture desired)

===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

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