Changes

{{Semantic Element

{{Semantic Element

|label=Cell manufacturing/Electrolyte Filling

|label=Cell manufacturing/Electrolyte Filling

|description===Production process==

|description====Production process===

*After the packaging process the electrolyte is filled in.

*Electrolyte filling follows the packaging process

*During electrolyte filling, a distinction must be made between the sub-processes "filling" and "wetting".

*The electrolyte filling process consists of the two sub-processes "filling" and "wetting"

*The electrolyte is filled into the cell under vacuum (filling) with the help of a high-precision dosing needle.

*Filling: Electrolyte is filled into the cell under vacuum

*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).

*Wetting: By supplying gas and/or generating a vacuum, the capillary effect in the cell is activated  

*Evacuation and partial filling are repeated several times depending on the manufacturer and cell type.

*Evacuation and partial filling repeated several times  

*Finally, the pouch foil is sealed under vacuum.

*Pouch foil is sealed under vacuum

*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.

*Electrolyte is usually a purchased substance; sets high requirements on process environment (fire protection, extraction, etc.)

==Process parameters & requirements==

===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

*Consistent, continuous or cyclic filling to ensure homogeneous electrolyte distribution

*Homogeneous electrolyte distribution

*Very dry environment necessary

*Necessity of very dry environment

*Gravimetric control of the electrolyte quantity

*Control of electrolyte quantity

==Technology alternatives==

===Quality influences===

*Dosing and distribution accuracy of electrolyte in the cell

 

*Electrolyte residues in the sealing seam

*Dosing and distribution accuracy of the electrolyte in the cell

*No electrolyte residues in the sealing seam

*Tightness of the sealed cell

*Tightness of the sealed cell

==Source==

===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