| abstract |
A non-aqueous electrolyte secondary battery includes an electrode body including a positive electrode (18) and a negative electrode (20) superimposed upon each other with a separator (22) interposed therebetween. The negative electrode (20) is superimposed upon the positive electrode (18) in a state where a negative electrode active material layer (20b), except the part on a proximal end part of a negative electrode tab (20c), is positioned inside an outer edge of a positive electrode active material layer (18b) of the positive electrode. A width H1 of the negative electrode active material layer including the part on the proximal end part of the negative electrode tab, width H2 of the negative electrode active material layer or negative electrode current collector at a part other than the negative electrode tab, and width H3 of the positive electrode active material layer are formed to satisfy the relationships of H2<H3, and (H1-H2)≥(H3-H2)ö2. |