| 摘要 |
PROBLEM TO BE SOLVED: To provide a spiral electrode plate group with a sufficient cycle life performance and a cylindrical secondary battery equipped with it, by preventing a short circuit in a piling portion of an intersection of a crosspiece of a positive- electrode lattice and an intersection of a crosspiece of a negative-electrode lattice. SOLUTION: In the spiral electrode plate group which is wound with the positive electrode plate, which a positive-electrode active material is held in the positive-electrode lattice, and the negative-electrode plate, which a negative- electrode active material is held in the negative-electrode lattice, through separator, the spiral electrode plate group and the cylindrical secondary battery provided with it are constituted so that the intersection 75 of the crosspiece of the positive-electrode lattice and the intersections 85 of the crosspiece of the negative-electrode lattice may not overlap. By this, the danger of the short circuit can be reduced also in a high-pressuring state, and the cycle life performance is improved.
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