NOVELTY - The assembly has a cathode collector (110) whose cathode (122) is coated with cathode active material (120). An anode (142) of an anode collector (150) is coated with anode active material (140). A separator (130) is arranged between the cathode and the anode. An insulation layer (160) is arranged on a tab part of the cathode collector constituting the cathode. The insulation layer comprises an exposed portion (T2) at which an end of the tab part is exposed. Width of the insulation layer is about 1-20 mm.    USE - Electrode assembly for an electrochemical device e.g. secondary battery, battery pack comprising battery modules and battery module comprising secondary batteries (all claimed) i.e. lithium secondary batteries such as cylindrical-type lithium secondary batteries, prismatic-type lithium secondary batteries and pouch-type lithium secondary batteries, for wireless mobiles devices. Can also be used for hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), battery electric vehicles (BEVs), electric vehicles (EVs), internal combustion engine vehicles and gasoline and diesel vehicles.    ADVANTAGE - The assembly prevents a sequentially stacked structure of cathode/separator/anode physical short circuits between the cathode and the anode by arranging the insulation layer on an end of the cathode collector that is used as a tab of the cathode electrode in a structure of the electrode assembly. The secondary battery comprises a structure in which deterioration in operational performance is maximally inhibited even over prolonged use, superior life-cycle is realized and mass production is enhanced at low cost when the secondary battery is used for power sources for medium-large sized devices.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of a structure of an electrode assembly.    Exposed portion (T2)    Cathode collector (110)    Cathode active material (120)    Cathode (122)    Separator (130)    Anode active material (140)    Anode (142)    Anode collector (150)    Insulation layer (160)