LAMINATION TYPE SECONDARY BATTERIES

摘要

The present invention provides a lamination type secondary battery in which separators are prevented from becoming wrinkled and are free from laminating dislocation. An aspect of the present invention is a lamination type secondary battery in which a plurality of planar positive electrodes (2) and negative electrodes (3) are alternately laminated. The lamination type secondary battery includes a plurality of pairs of separators (4′), an intermittent joining section (6), and an outer periphery joining section (7). Each pair of separators (4′) sandwiches and coats at least one among from the positive electrodes (2) and the negative electrodes (3). The intermittent joining section (6) is arranged at predetermined intervals along an outer periphery of each of the positive electrodes (2) or each of the negative electrodes (3). The intermittent joining section (6) is a section that joins the pair of separators (4′). The outer periphery joining section (7) partly joins the outer peripheries of the pair of separators (4′) such that the outer periphery joining section (7) is harder than the other sections.