Electrode assembly and cylindrical battery cell, and battery pack and vehicle comprising the same

A battery cell comprising:

• an electrode assembly in which a first electrode and a second electrode are wound in a state where the first electrode and the second electrode are stacked with a separation layer therebetween;
• and
• a cell can configured to accommodate the electrode assembly therein,
• wherein the first electrode includes a first electrode coated portion, the first electrode coated portion having a first active material coated on a surface of the first electrode, and
• wherein the second electrode includes:
• a second electrode coating portion, the second electrode coated portion having a second active material coated on a surface of the second electrode;
• a second electrode uncoated portion to which the second active material is not applied, the second electrode uncoated portion being located at an end portion of one side of the second electrode in an axial direction thereof;
• and
• an insulation coating layer at a boundary portion between the second electrode coated portion and the second electrode uncoated portion at an end portion of the second electrode uncoated portion, the insulating coating layer being thinner than the second electrode coating, the boundary portion being located further inward than an end portion of the separation layer in the axial direction, and the boundary portion extending further outward than the end portion of the separation layer in the axial direction,
• wherein the second electrode uncoated portion is bent at a bent position in a radial direction of the electrode assembly, the bent position being located further outward than the end portion of the separation layer in the axial direction, and
• wherein the bent position is located in an area that is not coated with the insulation coating laver.

An electrode assembly in which a first electrode and a second electrode are wound in a state where the first electrode and the second electrode are stacked with a separation layer therebetween,

• wherein the first electrode includes a first electrode coated portion, the first electrode coated portion having a first active material coated on a surface of the first electrode, and
• wherein the second electrode includes:
• a second electrode coating portion, the second electrode coated portion having a second active material coated on a surface of the second electrode;
• a second electrode uncoated portion to which the second active material is not applied, the second electrode uncoated portion being located at an end portion of one side of the second electrode in an axial direction thereof;
• and
• an insulation coating layer at a boundary portion between the second electrode coated portion and the second electrode uncoated portion at an end portion of the second electrode uncoated portion, the insulating coating layer being thinner than the second electrode coating, the boundary portion being located further inward than an end portion of the separation layer in the axial direction, and the boundary portion extending further outward than the end portion of the separation layer in the axial direction,
• wherein the second electrode uncoated portion is bent at a bent position in a radial direction of the electrode assembly, the bent position being located further outward than the end portion of the separation layer in the axial direction, and
• wherein the bent position is located in an area that is not coated with the insulation coating layer.