Secondary battery and method of manufacturing same

A method of manufacturing a secondary battery including an electrode body having a positive electrode plate having a positive electrode tab, a negative electrode plate having a negative electrode tab, and a separator disposed between the positive electrode plate and the negative electrode plate, a positive electrode collector electrically connected to the positive electrode plate, a negative electrode collector electrically connected to the negative electrode plate, an outer package that includes an opening and that houses the electrode body, and a sealing plate that seals the opening, wherein the positive electrode tab and the negative electrode tab are disposed on a sealing plate side of the electrode body, the positive electrode plate includes a positive electrode core body and a positive electrode active material mixture layer formed on the positive electrode core body, the positive electrode plate having a body portion in which the positive electrode active material mixture layer is formed on the positive electrode core body, the positive electrode tab protrudes from an end portion of the body portion, a cutaway is, in the body portion of the positive electrode plate, provide at a base of the positive electrode tab, and the positive electrode tab and the negative electrode tab are in a curved state, the method of manufacturing a secondary battery comprising:

• a cutting away step of providing, in the positive electrode core body, the cutaway at a portion in which the positive electrode active material mixture layer is formed;
• an electrode body fabricating step of fabricating the electrode body using the positive electrode plate and the negative electrode plate;
• and
• a connecting step of connecting the positive electrode tab to the positive electrode collector.