Patent ID: 7916454

Claim:
A capacitor comprising: a capacitor element including a positive electrode, a negative electrode facing the positive electrode, and a separator interposed between the positive electrode and the negative electrode; an electrolyte solution impregnated in the capacitor element; a case accommodating the capacitor element and the electrolyte solution and having an opening; a terminal plate provided with a first hole and sealing the opening of the case; a filter provided so as to close the first hole and composed of a gas permeable sheet capable of preventing permeation of the electrolyte solution; a valve body having a hollow cylindrical part and a bottom part, being disposed so that the bottom part covers the first hole, and being formed of an elastic material; and a cap fixed to the terminal plate, covering and holding the valve body in a state in which the cylindrical part of the valve body is deformed so as to buckle, the cap having a second hole; wherein the valve body and the filter are spaced apart from each other.