Battery value chain/Process/Cell manufacturing/Electrolyte Filling

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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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Subject	Property	Object
Cell manufacturing/Electrolyte Filling	HasPredecessor	Cell manufacturing/Packaging
Cell manufacturing/Electrolyte Filling	Category	Glossary Entry
Cell manufacturing/Electrolyte Filling	HasSuccessor	Cell manufacturing/Formation

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