| 摘要 |
PROBLEM TO BE SOLVED: To provide a secondary battery which enables a sealed housing to be easily disassembled during recycling.SOLUTION: A secondary battery 1 includes: a battery element 15; and a cylindrical housing 40 configured to house the battery element 15. An outer peripheral surface of the housing 40 includes a curved part 42c at a part thereof when viewed in an axial direction. The curved part 42c has a protrusion part 50 for taking up a part of the outer peripheral surface around an axis of the housing 40 into a belt-like form and separating the housing 40 in the axial direction.SELECTED DRAWING: Figure 1 |
