CAP ASSEMBLY, SECONDARY BATTERY INCLUDING SAME, AND METHOD FOR MANUFACTURING CAP ASSEMBLY

The present invention provides a cap assembly (210), a secondary battery including the same, and a method for manufacturing the cap assembly (210). The cap assembly (210) includes a cap plate (212) having a through hole and including a coating layer (213) disposed on at least a portion of an upper surface thereof, a terminal plate (216) including a body part (216a) and an inserting part (216b) which protrudes from the body part (216a) and is inserted into the through hole, an insulator (214) interposed between the cap plate (212) and the terminal plate (216), and a filler (219) disposed in at least a portion of a space in which the inserting part (216b) inserted into the through hole is surrounded with the insulator (214) and the cap plate (212).