Sealed cell

Abstract

An object of the present invention is to provide a sealed cell having a sealing body with a space-saving safety valve that has excellent safety. The sealed cell is sealed by caulking the sealing body around an opening of a bottomed cylindrical outer can. The sealing body includes a terminal cap and a safety valve. The terminal cap includes an external terminal projecting toward an outside of the sealed cell, a flange portion in a periphery of the external terminal, and one or more gas releasing holes for releasing a gas from inside to outside of the cell. The gas releasing holes is provided in the external terminal. And the safety valve includes a conductive contact portion projecting toward an inside of the sealed cell, a peripheral portion in a periphery of the conductive contact portion, and one or more break grooves formed radially in the peripheral portion, Moreover, at least one of the gas releasing holes overlap with at least one of break grooves in planar view of the sealed cell.

Dependencies are inferred from the claim text.