Cell & Pack Manufacturing

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.