Secondary battery for testing internal short, method and apparatus for testing internal short of secondary battery using the same

A secondary battery for testing an internal short, comprising:

• at least one unit cell comprising:
• a positive electrode plate including a positive electrode current collector and a positive electrode active material layer;
• a negative electrode plate including a negative electrode current collector and a negative electrode active material layer;
• and
• a separator interposed between the positive electrode plate and the negative electrode plate;
• a positive electrode tab formed in the positive electrode plate and a positive electrode lead having one end connected to the positive electrode tab;
• a negative electrode tab formed in the negative electrode plate and a negative electrode lead having one end connected to the negative electrode tab, and
• wherein any one of the at least one unit cell comprises:
• a positive electrode side metal terminal having one end disposed between the positive electrode plate and the separator and an opposite end extending out of the unit cell;
• and
• a negative electrode side metal terminal having one end disposed between the negative electrode plate and the separator and an opposite end extending out of the unit cell, and
• wherein the secondary battery for testing an internal short is used to cause an internal short in the unit cell by contact between the opposite end of the positive electrode side metal terminal and the opposite end of the negative electrode side metal terminal.