Battery value chain/Process/Cell manufacturing/Formation - Revision history

Simon Stier: Text replacement - "Has predecessor" to "HasPredecessor"

2022-09-04T03:18:57Z

Text replacement - "Has predecessor" to "HasPredecessor"

Simon Stier: Text replacement - "Has successor" to "HasSuccessor"

2022-09-04T02:16:42Z

Text replacement - "Has successor" to "HasSuccessor"

Simon Stier: updates form Formation

2021-11-19T15:27:33Z

updates form Formation

Christina Leinauer at 10:13, 15 June 2021

2021-06-15T10:13:15Z

Christina Leinauer: Created page with "{{Semantic Element |label=Cell manufacturing/Formation |description===Production process== *The formation describes the first charging and discharging processes of the batt..."

2021-06-15T10:01:49Z

Created page with "{{Semantic Element |label=Cell manufacturing/Formation |description===Production process== *The formation describes the first charging and discharging processes of the batt..."

New page

{{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
}}
}}

@@ Line 41: / Line 41: @@
 |value=Battery value chain/Process/Cell manufacturing/Electrolyte Filling
 }}{{Semantic Link
-|property=Has successor
+|property=HasSuccessor
 |value=Battery value chain/Process/Cell manufacturing/Degassing
 }}
 }}

@@ Line 38: / Line 38: @@
 |relations={{Semantic Link
-|property=Has predecessor
+|property=HasPredecessor
 |value=Battery value chain/Process/Cell manufacturing/Electrolyte Filling
 }}{{Semantic Link

@@ Line 1: / Line 1: @@
-{{Semantic Element
+{{GlossaryEntry}}{{Semantic Element
 |label=Cell manufacturing/Formation
-|description===Production process==
+|description=
-*The formation describes the first charging and discharging processes of the battery cell.
+*Formation is first charging and discharging processes of the cell
-*For formation, the cells are put in special good carriers in formation racks and contacted by spring-loaded contact pins.
+*Cells are stored 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.
+*Cells are charged / discharged according to predefined 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.
+*During formation, lithium ions are embedded in the crystal structure of the graphite on the anode side which leads to formation of the Solid Electrolyte Interface (SEI); SEI creates an interface layer between electrolyte and 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.
+*Parameters during formation have high impact on cell performance
-==Process parameters & requirements==
+===Process parameters & requirements===
-*First charge: approx. 0.1 C - 0.5 C; State of Charge (SOC) approx. 20 % - 80 %
+*First charge: approx. 0.1 C - 0.5 C; SOC approx. 20 % - 80 %
 *Successive increase in C-rates with each charging and discharging cycle
-*Duration of formation process: up to 24 h
+*Duration: up to 24 h
 *Low contact resistances at the spring-loaded contact pins
-==Technology alternatives==
+===Technology alternatives===
-*There are different procedures for the formation depending on the cell manufacturer and cell chemistry.
+*Different formation procedures
-==Quality influences==
+===Quality influences===
 *Orientation of the cells
@@ Line 28: / Line 28: @@
 *Pressurisation, especially of pouch cells
-==Quality features==
+===Quality features===
 *Formation of the SEI layer
@@ Line 34: / Line 34: @@
 *Internal resistance of the 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
 |relations={{Semantic Link
 |property=Has predecessor