NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

Provided is a nonaqueous electrolyte secondary battery which exhibits excellent high load characteristics, while having good charge and discharge cycle characteristics. A nonaqueous electrolyte secondary battery according to the present invention is characterized in that: a flattened electrode body having a pair of wide surfaces is contained in an outer case; the flattened electrode body is obtained by laminating a long positive electrode and a long negative electrode, with a separator being interposed therebetween, and winding the laminate into a coil; the positive electrode and the negative electrode respectively have a positive electrode collector tab and a negative electrode collector tab; at least one of the positive electrode and the negative electrode has two or more collector tabs; and the positive electrode collector tab and the negative electrode collector tab are arranged so as not to overlap with each other in a side view of the electrode body from a wide surface side.