Apparatus and method for sealing secondary battery

An apparatus for sealing a pouch of a secondary battery, the apparatus comprising:

• a support block configured to support a bottom surface of a one-side sealing part of the pouch;
• a sealing member comprising a sealing roller that is configured to move in a longitudinal direction of the one-side sealing part in a state of pressing a top surface of the one-side sealing part supported on the support block to seal the one-side sealing part supported on the support block;
• and
• a straightening member configured to flatten the top surface of the one-side sealing part on which the sealing roller is configured to press, wherein the straightening member comprises:
• a pair of straightening blocks, which are respectively provided on opposite sides of the support block to support the bottom surface of the one-side sealing part disposed at the opposite sides of the support block;
• and
• a pair of straightening rollers which are configured to move in the longitudinal direction of the one-side sealing part in a state of pressing the top surface of the one-side sealing part supported by each of the straightening blocks while overlying the pair of straightening blocks, thereby flattening the top surface of the one-side sealing part.