| 摘要 |
The cylindrical secondary battery includes a plurality conductive leads, which are formed to be tapered from a root portion to a tip portion, and when a tolerance of a pitch of the conductive leads is Deltap and a difference of width dimension between the root portion and the tip portion of the conductive leads is Deltaw, the pitch of the conductive leads is set to fall within a proper region where a variation range of a numerical value obtained by dividing a standard deviation of the number of layers of the conductive leads when the conductive leads are wound around a current collecting member by an average value of the standard deviations of the number of layers of the conductive leads is a predetermined value or less, and a range of the proper region is larger than the sum of Deltap and Deltaw. |
