Patent ID: 8497034

Claim:
An alkaline battery comprising a bottomed cylindrical battery case, a positive electrode of a hollow cylindrical shape disposed in contact with an inner surface of the battery case, a gelled negative electrode disposed in a hollow portion of the positive electrode, a separator interposed between the positive electrode and the negative electrode, and an alkaline electrolyte, wherein: the separator includes a cylindrical separator disposed in contact with an inner side surface of the positive electrode, and a bottom separator covering an opening of the cylindrical separator in the bottom side of the battery case, a bottom of the battery case includes: an annular base portion supporting the positive electrode and being in direct contact with a bottom of the positive electrode; an annular intermediate portion provided inwardly of the base portion and supporting the bottom separator; and a terminal portion provided so as to protrude outwardly from the intermediate portion, and the intermediate portion has an inclined surface on an inner bottom surface of the battery case, the inclined surface being formed so as to incline outwardly from the base portion toward the terminal portion, and an inclined angle of the inclined surface relative to a plane perpendicular to the axis direction of the battery case is 2 to 15°.