Secondary battery and battery pack

A battery pack comprising:

• a secondary battery;
• a processor configured to control the secondary battery;
• and
• an outer package body containing the secondary battery,
• the secondary battery including
• an electrode wound body including a stacked body and having a through hole, the stacked body including a first electrode, a second electrode, and a separator and being wound along a longitudinal direction of the stacked body, the through hole extending through the electrode wound body in a width direction orthogonal to the longitudinal direction,
• a first electrode current collector plate and a second electrode current collector plate that are opposed to each other with the electrode wound body interposed between the first electrode current collector plate and the second electrode current collector plate in the width direction, and
• a container that is electrically conductive and contains the electrode wound body, the first electrode current collector plate, and the second electrode current collector plate, wherein
• the electrode wound body includes a first end face and a second end face, the first end face facing the first electrode current collector plate in the width direction and being joined to the first electrode current collector plate, the second end face facing the second electrode current collector plate in the width direction and being joined to the second electrode current collector plate,
• the container includes a bottom part opposed to the second end face with the second electrode current collector plate interposed between the bottom part and the second end face,
• the bottom part is joined to the second electrode current collector plate in one or more first joint parts provided in a region other than a region overlapping the through hole in the width direction, and
• one or more second joint parts in which the second electrode current collector plate and the second end face are joined to each other are provided in an inner region, an outer region, or each of the inner region and the outer region, the inner region lying between each of the one or more first joint parts and the through hole in a plane, of the second electrode current collector plate, orthogonal to the width direction, the outer region lying on an opposite side of each of the one or more first joint parts to the through hole in the plane, of the second electrode current collector plate, orthogonal to the width direction.