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Battery value chain/Process/Cell manufacturing/Stacking (view source)
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, 11:55, 15 June 2021Created page with "{{Semantic Element |label=Cell manufacturing/Stacking |description===Production process== *During the stacking process the separated electrode sheets are stacked in a repea..."
{{Semantic Element
|label=Cell manufacturing/Stacking
|description===Production process==
*During the stacking process the separated electrode sheets are stacked in a repeating cycle of anode, separator, cathode, separator, etc.
*A wide variety of stacking technologies exist, which are usually patented by specific manufacturers.
*A classic variant of stacking is the so-called Z-folding.
*The anode and cathode sheets are inserted alternately from the left and right into the z-shaped folded separator. The separator is used in the form of an endless tape and is cut off after the * stacking process.
*The cell stack is finally fixed with adhesive tape.
*The exact positioning of the individual sheets is considered as the central quality criterion.
*The sheets are usually transported and positioned by vacuum grippers.
*Depending on the cell specification, a cell stack can consist of up to 120 individual layers.
==Process parameters & requirements==
*Z-folding: Individual anode and cathode sheets are placed laterally in the Z-folded separator web
*Single-sheet stacking: Separator is available as a sheet for stack formation
*Stacking accuracy: ± 200 μm - 300 μm
*Z-folding and single-sheet stacking : cycle times of 1 s/sheet
==Technology alternatives==
*Lamination process: The individual electrode and separator sheets are laminated onto each other in a continuous process and are then usually pressed together by a heat press.
*Pocket Stacking: The cathode sheets are placed in a separator pocket. Afterwards cathode and anode sheets are stacked alternately.
==Quality influences==
*Position detection and alignment of sheets of different sizes with a vacuum gripper
*Mechanical pre-tensioning of the separator
==Quality features==
*Positioning accuracy of the anode and cathode sheets
*Damage-free electrode surfaces and edges
*Avoidance of electrostatic charging
==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/Vacuum Drying
}}
}}
|label=Cell manufacturing/Stacking
|description===Production process==
*During the stacking process the separated electrode sheets are stacked in a repeating cycle of anode, separator, cathode, separator, etc.
*A wide variety of stacking technologies exist, which are usually patented by specific manufacturers.
*A classic variant of stacking is the so-called Z-folding.
*The anode and cathode sheets are inserted alternately from the left and right into the z-shaped folded separator. The separator is used in the form of an endless tape and is cut off after the * stacking process.
*The cell stack is finally fixed with adhesive tape.
*The exact positioning of the individual sheets is considered as the central quality criterion.
*The sheets are usually transported and positioned by vacuum grippers.
*Depending on the cell specification, a cell stack can consist of up to 120 individual layers.
==Process parameters & requirements==
*Z-folding: Individual anode and cathode sheets are placed laterally in the Z-folded separator web
*Single-sheet stacking: Separator is available as a sheet for stack formation
*Stacking accuracy: ± 200 μm - 300 μm
*Z-folding and single-sheet stacking : cycle times of 1 s/sheet
==Technology alternatives==
*Lamination process: The individual electrode and separator sheets are laminated onto each other in a continuous process and are then usually pressed together by a heat press.
*Pocket Stacking: The cathode sheets are placed in a separator pocket. Afterwards cathode and anode sheets are stacked alternately.
==Quality influences==
*Position detection and alignment of sheets of different sizes with a vacuum gripper
*Mechanical pre-tensioning of the separator
==Quality features==
*Positioning accuracy of the anode and cathode sheets
*Damage-free electrode surfaces and edges
*Avoidance of electrostatic charging
==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/Vacuum Drying
}}
}}
