| 摘要 |
A non-aqueous electrolyte secondary battery of the invention comprises a power generating element in which a strip negative electrode having negative mixture layers on a negative substrate and a strip positive electrode having positive mixture layers on a positive substrate are wound in a flat, elliptic cylindrical shape with a separator therebetween and in which one edge portion of the negative substrate and one edge portion of the positive substrate protrude from the separator to the opposite direction from each other. When the dimensions of said power generating element hold the relations of Y/X>=2.5 and Y/Z>=0.6, where X is the length of minor axis, Y is the length of major axis and Z is the height of said power generating element held in a cell case, the present invention provides the non-aqueous electrolyte secondary battery having large discharge capacity and excellent discharge characteristics.
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