Patent ID: 8828596

Claim:
A secondary battery, comprising: an electrode assembly including a first electrode, a second electrode, a separator interposed between the first electrode and the second electrode and insulating the first electrode and the second electrode from each other, and a first electrode tab and a second electrode tab connected to the first electrode and the second electrode, respectively; a case including a receiving part that receives the electrode assembly, the case having an open side; a cap plate sealing the open side of the case; and a first electrode terminal and a second electrode terminal passing through the cap plate, the first electrode terminal being connected to the first electrode tab, the second electrode terminal being connected to the second electrode tab, wherein: the first electrode terminal includes a first terminal and a multi-plate structure including a lower terminal plate and an upper terminal plate, the lower terminal plate provided at a top end of the first terminal, and the upper terminal plate provided over the lower terminal plate, the first electrode tab being connected to a bottom end of the first terminal, the second electrode terminal includes a second terminal with an upper end connected to a one-plate structure different from the multi-plate structure of the first electrode terminal, the first electrode tab, the first terminal, and the lower terminal plate is made of a first material, the upper terminal plate is made of a second material different from the first material; and the one-plate structure of the second terminal is made from a material different from the first material, and further comprising a first bus bar connected to the upper terminal plate and a second bus bar connected to the one-plate structure.