d 11 and the second tangential line d 12 is above 15 of the thickness of the conductive plate 400 when the first bending portion 412 a and the second bending portion 412 are excessively bent the coupling area between the conductive plate 400 and the soldering portion 500 decreases weakening the coupling force between the conductive plate 400 and the soldering portion 500 accordingly the distance d 10 needs to be within a range between 3 to 15 to maintain the coupling force of the soldering portion 500 the connection region 413 extends from the second bending portion 412 b in addition the connection region 413 is parallel to the first electrical connection region 411 a central portion of the connection region is bent to maintain the angle between the first protective circuit board 200 and the second protective circuit board 300 within a range of 80 to 100 degrees the conductive plate 400 is bent as illustrated in fig1 b accordingly the first protective circuit board 200 having the protective circuit and the second protective circuit board 300 having the connector 330 may be easily mounted longitudinally and transversely inside the battery pack the second bending region 414 extends from the connection region 413 and includes bending portions 414 a and 414 b the bending portions 414 a and 414 b have shapes corresponding to those of the first bending portion 412 a and the second bending portion 412 b of the first bending region 412 in other words each conductive plate 400 is symmetrical with respect to a reference line vertical to the length of the conductive plate 400 the reference line being positioned at the center of the connection region 413 accordingly detailed descriptions of the bending portions of the second bending region.