Cylindrical non-aqueous electrolyte secondary battery

A cylindrical non-aqueous electrolyte secondary battery, comprising:

• an electrode assembly having a long strip-shaped positive electrode and a long strip-shaped negative electrode wound via a separator, the positive electrode including a positive electrode current collector and positive electrode mixture layers arranged on both surfaces of the positive electrode current collector, the negative electrode including a negative electrode current collector and negative electrode mixture layers arranged on both surfaces of the negative electrode current collector;
• a positive electrode lead fixed to the positive electrode current collector and including a protrusion protruding from a first side of the electrode assembly in a height direction;
• and
• a negative electrode lead fixed to the negative electrode current collector and including a protrusion protruding from a second side of the electrode assembly in the height direction, wherein
• the positive electrode has two or more double-sided positive electrode current collector exposed portions in each of which the positive electrode current collector is exposed in substantially equivalent regions in a positive electrode longitudinal direction on both of a positive electrode first surface and a positive electrode second surface,
• the two or more double-sided positive electrode current collector exposed portions are provided at places spaced from both of a winding starting end and a winding finishing end in the positive electrode longitudinal direction and are arranged to be spaced from each other in the positive electrode longitudinal direction,
• the two or more double-sided positive electrode current collector exposed portions include a lead fixed exposed portion to which the positive electrode lead is fixed and a lead non-fixed exposed portion to which the positive electrode lead is not fixed,
• the negative electrode has two or more double-sided negative electrode mixture layer formation portions in each of which the negative electrode mixture layers exist in substantially equivalent regions in a negative electrode longitudinal direction on both of a negative electrode first surface and a negative electrode second surface, and has at least one double-sided negative electrode current collector exposed portion from which the negative electrode current collector is exposed in substantially equivalent regions in the negative electrode longitudinal direction on both of the negative electrode first surface and the negative electrode second surface,
• the double-sided negative electrode current collector exposed portion faces the double-sided positive electrode current collector exposed portion via the separator,
• the negative electrode lead is fixed to the double-sided negative electrode current collector exposed portion, and
• at least part of the positive electrode lead is arranged at a place, on the positive electrode, that overlaps in the height direction with a negative electrode lead facing position that faces the negative electrode lead via the separator.