Cylindrical battery and method for producing cylindrical battery

A cylindrical battery, comprising:

• a battery element;
• an outer can having a bottomed cylindrical shape with an opening on one side, the outer can housing the battery element;
• a sealing body that seals the opening of the outer can;
• and
• a welded portion in which the outer can and the sealing body are welded, the welded portion extending in a first direction along a boundary between the outer can and the sealing body, wherein
• the following relation is satisfied:
• 1.5
• ≥
• D
• /
• Max
• ⁢
• (
• B
• ⁢
• 1
• ,
• B
• ⁢
• 2
• )
• ≥
• 0.4
• wherein D is a maximum welding depth from an outermost surface of the welded portion, B1 is a thickness of the outer can, B2 is a thickness of the sealing body, and Max(B1, B2) is a maximum thickness of the thickness B1 and the thickness B2.