| 摘要 |
The invention relates to a nonaqueous electrolyte secondary battery and a method for manufacturing the same. It is an object of the invention to provide a nonaqueous electrolyte secondary battery having good charge/discharge cycle characteristics, and good thermal stability and good dimensional stability after repeated charge/discharge cycles. The nonaqueous electrolyte secondary battery of the invention includes: a wound-type electrode group including a long positive electrode, a long negative electrode, and a separator disposed between the positive electrode and the negative electrode; a nonaqueous electrolyte; and a prismatic battery case accommodating the electrode group and the nonaqueous electrolyte. A horizontal cross-section of the electrode group has a major axis and a minor axis. The positive electrode includes a positive electrode current collector and a positive electrode active material layer disposed thereon, and the negative electrode includes a negative electrode current collector and a negative electrode active material layer disposed thereon. A tensile strength of the positive electrode when an elongation percentage in a longitudinal direction of the positive electrode is 1 % is not greater than 15 N/cm. |
