Prismatic lithium ion rechargeable battery

A prismatic lithium ion battery comprising:

• an electrode assembly having a wound structure of a stack of a positive electrode, a separator, and a negative electrode, the stack having a first side edge and a second side edge, the wound structure of the stack being formed by winding the stack around the first side edge, the wound structure of the stack having a side surface that is substantially parallel to the first side edge, and a top surface and a bottom surface, each of which is substantially perpendicular to the first side edge, the electrode assembly including a positive electrode tab that is coupled to the positive electrode and a negative electrode tab that is coupled to the negative electrode, each of the positive and negative tabs extending over the top surface of the electrode assembly;
• a first tape attached on a part of the side surface of the wound structure of the stack, the first tape partially covering the second side edge, the first tape being attached on an upper half region of the side surface of the wound structure that is closer to the top surface than the bottom surface;
• a second tape attached on a part of the bottom surface and a part of the side surface of the wound structure of the stack, the second tape not overlapping the first tape;
• and
• a prismatic can accommodating the electrode assembly.

A prismatic lithium ion battery comprising:

• an electrode assembly having a wound structure of a stack of a positive electrode, a separator, and a negative electrode, the stack having a first side edge and a second side edge, the wound structure of the stack being formed by winding the stack around the first side edge, the wound structure of the stack having a side surface that is substantially parallel to the first side edge, and a top surface and a bottom surface, each of which is substantially perpendicular to the first side edge, the electrode assembly including a positive electrode tab that is coupled to the positive electrode and a negative electrode tab that is coupled to the negative electrode, each of the positive and negative tabs extending over the top surface of the electrode assembly;
• a first tape formed on the second side edge portion of the stack, the first tape being disposed inside the wound structure of the stack after the stack is wound about the first side edge;
• a second tape attached on a part of the bottom surface and a part of the side surface of the wound structure of the stack, the second tape not overlapping the first tape;
• and
• a prismatic can accommodating the electrode assembly.