Cell manufacturing/Separation

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< Battery value chain‎ | Process‎ | Cell manufacturingBattery value chain/Process/Cell manufacturing/Separation
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|label=Cell manufacturing/Separation
 
|label=Cell manufacturing/Separation
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|description=
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===Production process===
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*Separation is the separation of anode, cathode, and separator sheets from roll material (daughter rolls)
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*Dried daughter rolls are fed to separation machine
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*Punching tool carries out shear cut in a continuous process
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*Individual sheets (coated on both sides) are transferred directly to the next process step
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*Blank edge of sheets are later used as welding area for cell tabs
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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: Guided laser beam allows active material to be ablated again at defined points, thus exposing the carrier foil
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*Laser cutting: Electrodes not pounched, but cut out by 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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|relations={{Semantic Link
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|property=HasPredecessor
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|value=Battery_value_chain/Process/Component_manufacturing
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}}{{Semantic Link
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|property=HasSuccessor
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|value=Battery value chain/Process/Cell manufacturing/Vacuum Drying
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}}
 
}}
 
}}

Latest revision as of 04:18, 4 September 2022


Description

Production process

  • Separation is the separation of anode, cathode, and separator sheets from roll material (daughter rolls)
  • Dried daughter rolls are fed to separation machine
  • Punching tool carries out shear cut in a continuous process
  • Individual sheets (coated on both sides) are transferred directly to the next process step
  • Blank edge of sheets are later used as welding area for cell tabs

Process parameters & requirements

  • Separation time punching: approx. 0.2 s/sheet
  • Tolerance requirements: approx. ±200 μm width and length tolerance for the sheets
  • Punching tool: Very good cutting edge quality (depending on wear resistance)

Technology alternatives

  • Laser ablation: Guided laser beam allows active material to be ablated again at defined points, thus exposing the carrier foil
  • Laser cutting: Electrodes not pounched, but cut out by laser

Quality influences

  • Heat-affected zone and suction of evaporated material during laser cutting
  • Finishing of tools
  • Cutting/punching speed

Quality features

  • Cutting edge geometry (e.g. smearing of the active material over the cutting edges)
  • Thermal and mechanical stress during the cutting process

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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