Secondary battery

A secondary battery comprising:

• a first electrode assembly including a positive electrode plate and a negative electrode plate;
• a second electrode assembly including a positive electrode plate and a negative electrode plate;
• an exterior body having an opening and containing the first electrode assembly and the second electrode assembly;
• a sealing plate sealing the opening;
• a current collector that is closer to the sealing plate than are the first electrode assembly and the second electrode assembly;
• and
• a terminal electrically connected to the current collector and attached to the sealing plate,
• wherein the sealing plate has an electrolytic solution introduction hole,
• wherein the first electrode assembly includes a first insulating sheet on an outermost surface thereof adjacent to the second electrode assembly,
• wherein the second electrode assembly includes a second insulating sheet on an outermost surface thereof adjacent to the first electrode assembly,
• wherein the first electrode assembly includes a first electrode tab group at an end thereof adjacent to the sealing plate, the first electrode tab group being electrically connected to the positive electrode plate or the negative electrode plate,
• wherein the second electrode assembly includes a second electrode tab group at an end thereof adjacent to the sealing plate, the second electrode tab group being electrically connected to the positive electrode plate or the negative electrode plate,
• wherein the first electrode tab group and the second electrode tab group are connected to the current collector,
• wherein a first tape is attached to both an outermost surface of the first tab group and the first insulating sheet,
• wherein the outermost surface of the first tab group is located at one side of the first tab group nearer the second electrode assembly than the other side of the first tab group in an alignment direction in which the first electrode assembly and the second electrode assembly are aligned with each other,
• wherein a second tape is attached to both an outermost surface of the second tab group and the second insulating sheet,
• wherein the outermost surface of the second tab group is located at one side of the second tab group nearer the first electrode assembly than the other side of the second tab group in the alignment direction,
• wherein the first tape is located to face the electrolytic solution introduction hole, and includes a region which is located on the outermost surface of the first tab group and overlaps the electrolytic solution introduction hole in a thickness direction of the sealing plate, and
• wherein the electrolytic solution introduction hole is sealed by a sealing member.