Electrode assembly, battery cell, battery cell processing device, and battery pack and vehicle comprising same

A method of manufacturing a battery cell, the method comprising:

• fabricating an electrode stack by stacking a separator, and a first electrode sheet and a second electrode sheet;
• fabricating an electrode cell body portion by winding the electrode stack;
• forming a cut line in an uncoated portion of the electrode cell body portion in an axial direction of the electrode cell body portion, by using a cutter portion moving in the axial direction;
• and
• forming a forming portion by pressing a bending planned portion provided between two adjacent cut lines that includes the cut line of the uncoated portion and laying the bending planned portion down in a radial direction by using a press portion.

An electrode assembly comprising:

• an electrode cell body portion including a separator stacked between a first electrode sheet and a second electrode sheet, the first electrode sheet, the second electrode sheet, and the separator being wound, and an uncoated portion being formed in an end portion of each of the first electrode sheet and the second electrode sheet in a width direction thereof, wherein an active material layer is not coated on the uncoated portion;
• a recessed portion disposed in the uncoated portion of the electrode cell body portion at a core side, and having a height at which the recessed portion is more recessed than the uncoated portion in an axial direction thereof, the uncoated portion being disposed more outward than the uncoated portion at the core side in a radial direction thereof;
• a plurality of cut lines provided in an outer portion than the recessed portion in the radial direction in the uncoated portion of the electrode cell body portion and formed to a predetermined depth in the axial direction;
• a plurality of cut line arrays formed by arranging the plurality of cut lines in a line;
• and
• a plurality of forming portions formed by pressing and laying down bending planned portions of the uncoated portion that are disposed between two cut line arrays adjacent to each other in a peripheral direction from among the plurality cut line arrays.

A method of manufacturing a battery cell, the method comprising:

• fabricating an electrode stack by stacking a separator, and a first electrode sheet and a second electrode sheet;
• removing a predetermined section of the uncoated portion of the electrode stack disposed adjacent to a core side to form a recessed portion disposed in the uncoated portion of the electrode stack at a core side;
• fabricating an electrode cell body portion by winding the electrode stack;
• forming a cut line in an uncoated portion of the electrode cell body portion in an axial direction of the electrode cell body portion, by using a cutter portion moving in the axial direction;
• and
• forming a forming portion by pressing a bending planned portion provided between two adjacent cut lines that includes the cut line of the uncoated portion and laying the bending planned portion down in a radial direction by using a press portion.