| 摘要 |
PROBLEM TO BE SOLVED: To prevent a portion of an electrode body at which a positive electrode and a negative electrode are overlaid on each other from riding over a corner round section of a case.SOLUTION: Two projection sections 30 are formed on a bottom wall 22 of a case body 21. Furthermore, length H from an inner face 221 of the bottom wall 22 to a tip 30a of the projection section 30 is such that a portion at which a positive electrode sheet 12 and a negative electrode sheet 13 are overlaid on each other is positioned on an inner side of the case body 21 than a corner round section R1 communicating the bottom wall 22, a first side wall 22a and a second side wall 22b while an electrode body 11 is in contact with a tip 30a of the projection section 30. |
