PURPOSE: To reduce assembly man-hour and increase airtightness by arranging an L-shaped terminal on the upper surface of a cover and a pressure contact terminal on its lower surface, and pressing them with a metal rivet.

CONSTITUTION: A metal rivet 12 having conductivity such as aluminum, lead, or copper is inserted into a through hole 5 of a cover 2, and an L-shaped terminal 10 and a pressure contact terminal 13 having a lead 14 are inserted into the metal rivet 12, then the metal rivet 12 is pressed. The other end of the lead 14 covered with an acid resistant cover is connected to a strap 15. A sealing material 7" is filled inside the cover 2 to embed the metal rivet 12 and the pressure contact terminal 13, then a container 1 and the cover 2 are sealed. The press contact part of the L-shaped terminal 10 and the metal rivet 12 are covered with an upper cover 2'. The filling of the sealing material is reduced to one time, and the container and the cover can be sealed at the same time as forming of the terminal. Therefore, assembly man-hour can be reduced.