NOVELTY - The battery (10A) has an end of a tubular portion (17a) of a conductive element (32) electrically connected to an external terminal (17). A positive electrode collector (16) and a negative electrode collector comprise a region (16a) parallel to a sealing body (13) and another region extends from the former region in a direction of an electrode assembly. An insulating element (20a) comprises projections formed at positions corresponding to openings (16g, 16j, 32b). The openings are engaged with the projections formed in the insulating element to form fixing portions (30a, 30c).    USE - Prismatic secondary battery e.g. nonaqueous electrolyte secondary battery, nickel-hydrogen secondary battery and alkaline secondary battery, for use as a drive power source for a portable electronic equipment and a vehicle e.g. electric vehicles and hybrid electric vehicle. Uses include but are not limited to smartphones, portable computer, PDA and portable music player.    ADVANTAGE - The battery enables arranging and aligning a connecting portion and the fixing portions, so that stress acting on the connecting portion is suppressed in an effective manner when the battery is subjected to shock. The battery enables setting actuation pressure for a current interruption mechanism to a value by determining thickness and formation extent of a brittle portion, thus enhancing reliability. The battery utilizes ribs to position the positive electrode collector relative to positive electrode substrate exposed portions and a wound electrode assembly relative to battery outer casing, thus preventing spatter during resistance welding of the positive electrode collector in an effective manner.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of a current interruption mechanism provided on a positive electrode side of a prismatic nonaqueous electrolyte secondary battery.    Prismatic secondary battery (10A)    Sealing body (13)    Positive electrode collector (16)    Region (16a)    Openings (16g, 16j, 32b)    External terminal (17)    Tubular portions (17a, 32a)    Insulating elements (20a, 20b, 34)    Fixing portions (30a, 30c)    Conductive element (32)