Secondary battery

Provided is a secondary battery capable of improving capacity by reducing the length of a bending region of an electrode tab. A secondary battery including an electrode assembly includes a plurality of first base material tabs protruding from a plurality of first electrode plates, respectively, and a plurality of second base material tabs protruding from a plurality of second electrode plates, respectively, the electrode assembly includes the plurality of first electrode plates coated with a first active material, the plurality of second electrode plates coated with a second active material, and a separator disposed between each of the first electrode plates and each of the second electrode plates. Each of the plurality of first base material tabs and each of the plurality of second base material tabs converge to one end of the electrode assembly in a thickness direction of the electrode assembly and are bonded to each other. 提供了一种能够通过减小电极接线片的弯曲区域的长度来提高容量的二次电池。包括电极组件的二次电池包括分别从多个第一电极板凸出的多个第一基体材料接线片和分别从多个第二电极板凸