Sealed cell

Abstract

An object of the present invention is to provide a sealed cell including a sealing body having a safety valve that is excellent in conductivity. The sealed cell is sealed by caulking a sealing body 10 around an opening of a bottomed cylindrical outer can 20. The sealing body 10 includes a terminal cap 5 made of an iron-based material and a safety valve 3 made of an aluminum-based material. The terminal cap 5 includes an external terminal 5a projecting toward an outside of the sealed cell, a flange 5b in a periphery of the external terminal, and a hole 5c in the flange. The hole 5c has a diameter smaller on an inner side than on an outer side of the sealed cell. The safety valve 3 includes a conductive contact portion 3a projecting toward an inside of the sealed cell, a peripheral portion 3b in a periphery of the conductive contact portion 3a, and a pin-like projection 3c in the peripheral portion 3b. The sealed cell has a riveted portion in which the pin-like projection 3c of the safety valve 3 and the hole 5c of the terminal cap 5 together are riveted by inserting the pin-like projection 3c into the hole 5c and crushing a tip of the pin-like projection 3c. And a diameter of the terminal cap 5 is larger than a diameter of the safety valve 3.

Dependencies are inferred from the claim text.