ELECTRIC ENERGY STORAGE DEVICE AND ITS MANUFACTURING METHOD

摘要

An electric energy storage device which has a connection structure having a high connection reliability and can avoid contact between an outer-packaging body and a connection terminal by a simple structure. The electric energy storage device comprises a battery element (10) stored in an outer-packaging body (20) including a metal layer (21b), a plate-like internal lead (31) connected to the battery element (10), a plate-like external lead (32), a connection terminal (33) for electrically connecting the internal lead (31) and the external lead (32), an inside insulation member (41), and an outside insulation member (43). The electric energy storage device is characterized in that flanges (33T, 33B) on both sides of the connection terminal (33) hold the outside insulation member (43), the outer-packaging body (20), and the inside insulation member (41) in between while pressing them via the plate-like external lead (32) and internal lead (31) and that the outside insulation member (43) and/or the inside insulation member (41) is press-fit between a through shaft (33S) of the connection terminal (33) and the metal layer (21b) of the outer-packaging body (20).