| abstract |
The separator is wound around the outermost periphery of an electrode group with a fixing member, and the outer peripheral surface of the electrode group is covered by at least one turn so that it can be easily inserted into a battery can. Provided is a highly reliable secondary battery electrode group that suppresses breakage, breakage of an electrode plate and falling off of an active material layer, suppresses an internal short circuit, and improves safety as a battery. A positive electrode plate, a negative electrode plate, and a separator are wound in a spiral shape, and the positive electrode plate, the negative electrode plate, and the separator are wound in a spiral shape. The terminal group 29 of the separator 3 wound around the outermost periphery of the electrode group 6 is covered with the tape 28 at least one turn or more on the outer peripheral surface of the electrode group 6 to constitute the electrode group 6. [Selection] Figure 2 |