Secondary battery

A secondary battery comprising:

• an electrode assembly in which a positive electrode and a negative electrode are alternately laminated with a separator therebetween;
• a first bus bar laminated on the outside of the positive electrode disposed on the outermost portion of one side of the electrode assembly with a first bus bar separator therebetween;
• a second bus bar laminated on the outside of the negative electrode disposed on the outermost portion of the other side of the electrode assembly with a second bus bar separator therebetween;
• a case accommodating the electrode assembly, the first bus bar, and the second bus bar;
• and
• a positive electrode lead directly connected to the electrode assembly to extend to the outside of the case,
• wherein the electrode assembly includes:
• first and second positive electrode tabs respectively extending in a length direction from opposite ends of the positive electrode with respect to the length direction, and
• first and second negative electrode tabs respectively extending in the length direction from opposite ends of the negative electrode with respect to the length direction, and
• wherein the second bus bar includes first and second positive electrode bus bar tabs directly connected to the first and second positive electrode tabs, respectively,
• wherein the first positive electrode tab is directly connected to the positive electrode lead,
• wherein the second positive electrode tab is electrically connected to the positive electrode lead through the second positive electrode bus bar tab, the first bus bar, the first positive electrode bus bar tab, and the first positive electrode tab, and
• wherein the second positive electrode tab is electrically connected to the outside of the case through the second positive electrode bus bar tab, the first bus bar, the first positive electrode bus bar tab, the first positive electrode tab, and the positive electrode lead.