Sealed battery and battery case

A sealed battery comprising:

• a battery case made of metal and having a bottom portion and an opening;
• a sealing member made of metal and sealing the opening of the battery case;
• and
• a power generation element housed in the battery case;
• wherein a side wall of the battery case includes a rising portion from the bottom portion, and a bent portion in an open end face side,
• the open end face extends toward an inside of the battery case,
• a thickness of the side wall of the battery case is 0.2 mm or less,
• in a section along a normal line of the bottom portion, an open end Pin in an inner peripheral surface side of the side wall is located at an intersection between the inner peripheral surface and a perpendicular line Lp perpendicular to a tangent line to the outer peripheral surface at an open end Pout in an outer peripheral surface side of the side wall, or the open end Pin is located in an extending direction side of the open end from the intersection.