Method for manufacturing film stack prepreg for forming lithium ion battery cell, involves forming folded film stack by folding of film prepreg at embossing locations by variable rolling velocity

摘要

The method involves providing sheet material for cathode and anode and an electrically soaked separator film (3). The separator film is arranged between cathode and anode and films are superimposed to form a film stack. The embossment of a folding pattern with alternatively arranged embossing locations is performed by feed roller. The formation of a folded film stack by folding of film prepreg is performed at embossing locations by variable rolling velocity. An independent claim is included for an arrangement for manufacturing film stack prepreg for forming lithium ion battery cell.