| 摘要 |
A secondary battery comprising at least an electrode group (4) in which a positive electrode plate (1), a negative electrode plate (2) and a porous insulation layer (3) are arranged such that the exposed portion of a current collector provided at one end of at least one of the positive electrode plate (1) and the negative electrode plate (2) projects from the porous insulation layer (3), current collecting members (10, 11) connected with the positive electrode plate (1) and the negative electrode plate (2), and a bending prevention portion provided at the exposed portion of the current collector and having a narrower width than the exposed portion of the current collector.
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