Patent ID: 8748030

Claim:
A battery, comprising: a housing including a case and a cap assembly, wherein the cap assembly includes an opening; an electrode assembly, the electrode assembly being disposed in an interior space of the housing; and a short-circuiting member including a first plate and second plate disposed opposite to the first plate, the first plate having an inverting portion and an edge portion, the inverting portion projecting toward an interior space of the housing, the edge portion including: a fixed portion that is fixed to a periphery of the opening, and a recess in a surface of the edge portion that faces the interior space, at least a part of the recess overlapping the periphery of the opening; wherein: the first plate is fixed to the cap assembly, the battery includes first and second terminals, the second plate being electrically connected to the first terminal, and the first plate being electrically connected to the second terminal, and the inverting portion is configured to invert when the interior space of the housing reaches a predetermined pressure, the inverting portion being configured to electrically contact the second plate when the inverting portion inverts.