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Manufacturing Process Map - 2. Cell Assembly - Pouch TAB WELDING
Tabs are ultrasonically welded to the jelly roll
POUCH FORMING
CHALLENGES
Making a case by pressing a film
corner cracking
20% of total manufacturing cost
CHALLENGES
foil damage; coating adhesion
parts/min
speed
scrap rate
CHALLENGES
positioning accuracy of anode & cathode sheets (alignment); speed (affects positioning)
LAMINATION & STACKING/WINDING Lamination: laminating layers to maintain positional integrity Stacking: stacking layers of electrode & separator. Note that wound pouch cells also exist.
ELECTROLYTE INJECTION
Filling the electrode pocket with electrolyte through metered dispensing
CHALLENGES
dosing and distribution accuracy of the electrolyte in the cell; No electrolyte residues in the sealing seam; seal integrity
*Graphics courtesy of LG Energy Solution. Reproduced with permission. Sources: LG Energy; BCG; RWTH PEM
Extracted from the PDF; charts and images may read imperfectly.
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