CAP ASSEMBLY OF SECONDARY BATTERY

The present disclosure relates to a cap assembly of a secondary battery. The cap assembly of the secondary battery includes: a current collector including a positive electrode terminal and a negative electrode terminal; a cap plate which the positive electrode terminal and the negative electrode terminal penetrate and which includes a protrusion portion respectively surrounding an outer circumference of the positive electrode terminal and an outer circumference of the negative electrode terminal; a first insulating member which the positive electrode terminal and the negative electrode terminal penetrate and which is disposed between the current collector and the cap plate; a bracket respectively disposed between the protrusion portion and the positive electrode terminal and between the protrusion portion and the negative electrode terminal; and a second insulating member respectively disposed between the bracket and the protrusion portion.