Cell manufacturing/Electrolyte Filling

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< Battery value chain‎ | Process‎ | Cell manufacturingBattery value chain/Process/Cell manufacturing/Electrolyte Filling
Battery value chainProcessCell manufacturingCell manufacturing/Electrolyte Filling
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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
 
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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Latest revision as of 04:17, 4 September 2022


Description

Production process

  • Electrolyte filling follows the packaging process
  • The electrolyte filling process consists of the two sub-processes "filling" and "wetting"
  • Filling: Electrolyte is filled into the cell under vacuum
  • Wetting: By supplying gas and/or generating a vacuum, the capillary effect in the cell is activated
  • Evacuation and partial filling repeated several times
  • Pouch foil is sealed under vacuum
  • Electrolyte is usually a purchased substance; sets high requirements on process environment (fire protection, extraction, etc.)

Process parameters & requirements

  • Geometry of the dosing needle
  • Working pressure: approx. 0.01 mbar
  • Homogeneous electrolyte distribution
  • Necessity of very dry environment
  • Control of electrolyte quantity

Quality influences

  • Dosing method
  • Geometry and closing mechanism of dosing
  • Electrolyte transport system

Quality features

  • Dosing and distribution accuracy of electrolyte in the cell
  • Electrolyte residues in the sealing seam
  • Tightness of the sealed cell

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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