Patent ID: 7687190

Claim:
A secondary battery constructed in a structure in which an electrode assembly having a cathode/separator/anode structure is mounted in a sheet-type battery case having a receiving part defined therein, the sheet-type battery case is sealed by thermal welding, and sealing parts are formed entirely along the edge of the receiving part by the thermal welding, wherein the sealing parts are perpendicularly bent such that the sealing parts are brought into tight contact with a side wall of the receiving part, and the secondary battery includes cathode and anode terminals positioned on opposite sides of the receiving part, respectively, and at least one protection circuit part is mounted on the perpendicularly bent sealing parts where the cathode and anode terminals are positioned, in the direction in which the protection circuit part is stably located on the side wall of the receiving part, and at least one excess part is formed at an upper and/or a lower portion of the battery case such that the excess part extends from the corresponding side sealing part adjacent to the cathode or anode terminal side sealing part, the excess part having a size corresponding to the width of the receiving part, wherein, when the corresponding sealing part is perpendicularly bent such that the sealing part is brought into tight contact with the side wall of the receiving part, the excess part covers a top surface or a bottom surface of the receiving part.