SECONDARY BATTERY AND BATTERY PACK INCLUDING THE SAME

A secondary battery includes a case, an electrode assembly inside the case, the electrode assembly including a first electrode and a second electrode, a first tab member connected to the first electrode, the first tab member extending from the electrode assembly, a cap assembly facing the electrode assembly, the cap assembly including a first terminal and a second terminal, and a first connection member between the electrode assembly and the cap assembly, the first connection member being connected to the first terminal and the first tab member, the first connection member further including a first deformation prevention part configured to prevent thermal deformation when connected to the first tab member.