NOVELTY - A pouch type lithium secondary battery comprises an electrode assembly having first and second electrode plates and a separator between the electrode plates, where the electrode plates each have an electrode tab; a pouch having a space; a protection circuit module having a junction pad; and a positive temperature coefficient element having one end attached to the junction pad and the other end electrically connected to one of the electrode tabs to interrupt electric current when a temperature of the battery rises.    USE - The battery is used as an electric source for portable electronic devices, e.g. cellular phones, laptop computers and camcorders.    ADVANTAGE - The battery has improved thermal stability and reduces its possibility of explosion.    DETAILED DESCRIPTION - A pouch type lithium secondary battery (100) comprises:    (1) an electrode assembly (110) including a first electrode plate (111) to which a first electrode tab (114) is attached, a second electrode plate (112) to which a second electrode tab (115) is attached and a separator (113) interposed between the first electrode plate and the second electrode plate;    (2) a pouch (120) having a space (121a) in which the electrode assembly is received;    (3) a protection circuit module (130) having a junction pad (135) to control charging and discharging of the electrode assembly; and    (4) a positive temperature coefficient element (150) having one end attached to the junction pad and the other end electrically connected to one of the first and second electrode tabs to interrupt electric current when a temperature of the battery rises.    An INDEPENDENT CLAIM is also included for a method of producing a pouch type lithium secondary batter comprising:    (A) sealing an electrode assembly in a pouch having opposing electrode tabs extending from the pouch;    (B) connecting one of the electrode tabs to a positive temperature coefficient element;    (C) connecting the positive temperature coefficient element to a junction pad on a protection circuit module; and    (D) connecting the other electrode tab to the protection circuit module to interrupt electric current flow when a temperature of the battery rises.    DESCRIPTION OF DRAWING(S) - The figure shows a pouch type lithium secondary battery.    Pouch type lithium secondary battery (100)    Electrode assembly (110)    First electrode plate (111)    Second electrode plate (112)    Separator (113)    First electrode tab (114)    Second electrode tab (115)    Insulation tape (116)    Pouch (120)    Space (121a)    Protection circuit module (130)    Junction pad (135)    First and second connection leads (140, 145)    Positive temperature coefficient element (150)