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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|label=Cell manufacturing/Electrolyte Filling
 
|label=Cell manufacturing/Electrolyte Filling
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|description===Production process==
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|description=
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===Production process===
  
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*After the packaging process the electrolyte is filled in.
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*Electrolyte filling follows the packaging process
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*During electrolyte filling, a distinction must be made between the sub-processes "filling" and "wetting".
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*The electrolyte filling process consists of the two sub-processes "filling" and "wetting"
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*The electrolyte is filled into the cell under vacuum (filling) with the help of a high-precision dosing needle.
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*Filling: Electrolyte is filled into the cell under vacuum
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*By applying a pressure profile to the cell (supply of inert gas and/or generation of a vacuum in alternating operation), the capillary effect in the cell is activated (wetting).
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*Wetting: By supplying gas and/or generating a vacuum, the capillary effect in the cell is activated  
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*Evacuation and partial filling are repeated several times depending on the manufacturer and cell type.
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*Evacuation and partial filling repeated several times  
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*Finally, the pouch foil is sealed under vacuum.
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*Pouch foil is sealed under vacuum
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*The electrolyte (e.g. LiPF6) is usually a purchased component and sets high requirements on the process environment (fire protection, extraction, etc.), due to its classification as a hazardous substance.
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*Electrolyte is usually a purchased substance; sets high requirements on process environment (fire protection, extraction, etc.)
  
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==Process parameters & requirements==
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===Process parameters & requirements===
  
 
*Geometry of the dosing needle
 
*Geometry of the dosing needle
 
*Working pressure: approx. 0.01 mbar
 
*Working pressure: approx. 0.01 mbar
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*Consistent, continuous or cyclic filling to ensure homogeneous electrolyte distribution
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*Homogeneous electrolyte distribution
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*Very dry environment necessary
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*Necessity of very dry environment
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*Gravimetric control of the electrolyte quantity
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*Control of electrolyte quantity
  
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==Technology alternatives==
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===Quality influences===
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No alternatives in series production.
 
  
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==Quality influences==
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*Dosing method
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*Geometry and closing mechanism of dosing
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*Electrolyte transport system
  
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*Dosing method (e.g. dosing pump)
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===Quality features===
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*Geometry and closing mechanism of the dosing needle
 
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*Electrolyte transport system (piping, etc.)
 
  
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==Quality features==
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*Dosing and distribution accuracy of electrolyte in the cell
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*Electrolyte residues in the sealing seam
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*Dosing and distribution accuracy of the electrolyte in the cell
 
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*No electrolyte residues in the sealing seam
 
 
*Tightness of the sealed cell
 
*Tightness of the sealed cell
  
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==Source==
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===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
 
|relations={{Semantic Link
 
|relations={{Semantic Link
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|property=Has predecessor
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|property=HasPredecessor
 
|value=Battery value chain/Process/Cell manufacturing/Packaging
 
|value=Battery value chain/Process/Cell manufacturing/Packaging
 
}}{{Semantic Link
 
}}{{Semantic Link
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|property=Has successor
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|property=HasSuccessor
 
|value=Battery value chain/Process/Cell manufacturing/Formation
 
|value=Battery value chain/Process/Cell manufacturing/Formation
 
}}{{Semantic Link
 
}}{{Semantic Link

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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