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==Production process== *Separation is necessary for the production of the pouch cell and describes the separation of * anode, cathode and separator sheets from the (bought) roll material (daughter rolls). *The dried daughter rolls are unwound and fed to
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|label=Cell manufacturing/Separation
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|description===Production process==
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*Separation is necessary for the production of the pouch cell and describes the separation of * anode, cathode and separator sheets from the (bought) roll material (daughter rolls).
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*The dried daughter rolls are unwound and fed to the separation tool.
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*The cutting process is usually carried out with a shear cut (punching tool) in a continuous process.
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*Depending on the system concept, the individual sheets (coated on both sides) are stored in a magazine or transferred directly to the next process step.
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*The blank edge of the sheets are later used as the welding area for the cell tabs.
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*The waste as well as the cutting dusts are extracted and transported away in the process.
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==Process parameters & requirements==
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*Separation time punching: approx. 0.2 s/sheet
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*Tolerance requirements: approx. ±200 μm width and length tolerance for the sheets
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*Punching tool: Very good cutting edge quality (depending on wear resistance)
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==Technology alternatives==
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*Laser ablation: A guided laser beam allows the active material to be ablated again at defined points, thus exposing the carrier foil. This technology offers a high flexibility with regard to the positioning of the cell tabs.
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*Laser cutting: Instead of a conventional punching tool, the electrodes can also be cut out by a laser.
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==Quality influences==
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*Heat-affected zone and suction of evaporated material during laser cutting
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*Finishing of tools
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*Cutting/punching speed
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==Quality features==
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*Cutting edge geometry (e.g. smearing of the active material over the cutting edges)
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*Thermal and mechanical stress during the cutting process
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==Source==
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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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