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Battery value chain/Process/Cell manufacturing/Formation (view source)
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, 12:01, 15 June 2021Created page with "{{Semantic Element |label=Cell manufacturing/Formation |description===Production process== *The formation describes the first charging and discharging processes of the batt..."
{{Semantic Element
|label=Cell manufacturing/Formation
|description===Production process==
*The formation describes the first charging and discharging processes of the battery cell.
*For formation, the cells are put in special good carriers in formation racks and contacted by spring-loaded contact pins.
*The cells are then charged or discharged according to precisely defined current and voltage curves.
*During formation, lithium ions are embedded in the crystal structure of the graphite on the anode side. Here the Solid Electrolyte Interface (SEI) is formed, which creates a interface layer between the electrolyte and the electrode.
*The parameters during formation vary depending on the cell manufacturer and have a high impact on cell performance. They depend on the cell concept and chemistry and represent the core knowledge of a cell manufacturer.
*In some cases, pouch cells in particular are pressurised during formation by special good carriers.
==Process parameters & requirements==
*First charge: approx. 0.1 C - 0.5 C; State of Charge (SOC) approx. 20 % - 80 %
*Successive increase in C-rates with each charging and discharging cycle
*Duration of formation process: up to 24 h
*Low contact resistances at the spring-loaded contact pins
==Technology alternatives==
*There are different procedures for the formation depending on the cell manufacturer and cell chemistry.
==Quality influences==
*Orientation of the cells
*Contact method
*Process temperature
*Pressurisation, especially of pouch cells
==Quality features==
*Formation of the SEI layer
*Stability of the SEI layer
*Internal resistance of the 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
|relations={{Semantic Link
|property=Has predecessor
|value=Battery value chain/Process/Cell manufacturing/Electrolyte Filling
}}
}}
|label=Cell manufacturing/Formation
|description===Production process==
*The formation describes the first charging and discharging processes of the battery cell.
*For formation, the cells are put in special good carriers in formation racks and contacted by spring-loaded contact pins.
*The cells are then charged or discharged according to precisely defined current and voltage curves.
*During formation, lithium ions are embedded in the crystal structure of the graphite on the anode side. Here the Solid Electrolyte Interface (SEI) is formed, which creates a interface layer between the electrolyte and the electrode.
*The parameters during formation vary depending on the cell manufacturer and have a high impact on cell performance. They depend on the cell concept and chemistry and represent the core knowledge of a cell manufacturer.
*In some cases, pouch cells in particular are pressurised during formation by special good carriers.
==Process parameters & requirements==
*First charge: approx. 0.1 C - 0.5 C; State of Charge (SOC) approx. 20 % - 80 %
*Successive increase in C-rates with each charging and discharging cycle
*Duration of formation process: up to 24 h
*Low contact resistances at the spring-loaded contact pins
==Technology alternatives==
*There are different procedures for the formation depending on the cell manufacturer and cell chemistry.
==Quality influences==
*Orientation of the cells
*Contact method
*Process temperature
*Pressurisation, especially of pouch cells
==Quality features==
*Formation of the SEI layer
*Stability of the SEI layer
*Internal resistance of the 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
|relations={{Semantic Link
|property=Has predecessor
|value=Battery value chain/Process/Cell manufacturing/Electrolyte Filling
}}
}}
