METHOD FOR STACKING CELLS INSIDE SECONDARY BATTERY AND CELL STACK MANUFACTURED USING SAME

摘要

The present invention relates to a method for stacking cells inside a secondary battery and, more specifically, to a method for manufacturing a separation film formed in a zigzag folding form and a cell stack having a structure in which a first electrode plate and a second electrode plate are alternately inserted and stacked into a folding section of the separation film, comprising: a separation film supply step for continuously supplying the separation film; a first stacking step for stacking the first electrode plate on one surface of the separation film and stacking the second electrode plate on the other surface of the separation film; a first rotating step for rotating an electrode stacked body, in which the first electrode plate, the separation film and the second electrode plate are sequentially stacked, by 180° in a constant direction centered around a rotation axis that is orthogonal to a direction from which the separation film is supplied; a second stacking step for stacking the first electrode plate on one surface of the electrode stacked body and stacking the second electrode plate on the other surface of the electrode stacked body in a state where separation films are restacked on the one surface or the other surface of the electrode stacked body by rotating the electrode stacked body by 180° in one direction; and a second rotating step for rotating the electrode stacked body stacked in the second stacking step by 180° in a direction that is opposite to the rotating direction in the first rotating step.