Patent ID: 8420241

Claim:
A sealed cell comprising: a bottomed cylindrical outer can; and a sealing body sealed by caulking around an opening of the outer can, wherein the sealing body includes: a terminal cap including an external terminal projecting toward an outside of the sealed cell, a flange in a periphery of the external terminal, and a hole formed in the flange, the hole having a diameter smaller on an inner side than on an outer side of the sealed cell; and a safety valve including a conductive contact portion projecting toward an inside of the sealed cell, a peripheral portion in a periphery of the conductive contact portion, and a pin-shaped projection in the peripheral portion, wherein the sealed cell has a riveted portion in which the pin-shaped projection of the safety valve and the hole of the terminal cap together are riveted by inserting the pin-shaped projection into the hole and crushing a tip of the pin-shaped projection; and a diameter of the terminal cap is larger than a diameter of the safety valve.