| 摘要 |
[Problem] The present invention pertains to a rectangular battery such that a collector to which a rib is provided is connected to the anode core exposed section and/or the cathode core exposed section of a flat electrode, and it is difficult for the collector and a packaging can to short-circuit via the rib. [Solution] A flat electrode, which has a cathode core exposed section layered at one end and has an anode core exposed section layered at the other end, is housed in a packaging can, an anode collector (18) is connected to the outermost surface in the direction of layering of the layered cathode core exposed section and/or the layered anode core exposed section, the collector (18) is formed having a collector main body (18A) and a rib (18B) extending in a direction approximately perpendicular to the collector main body (18A), an insulating sheet (23) is disposed between the rib (18B) and the packaging can (12), and, at a region that is not the tip (18D) of the rib (18B), the rib (18B) is formed having an easily folded section comprising a thin section, a groove (18C), an opening, or a notch that narrows the width of the rib. |
