Provided is a battery pack having improved product reliability by reducing a height of a solder portion connected when at least two or more unit cells are connected to a printed circuit module in series or parallel.
Aspects of the present invention provide a battery pack including a connection circuit board. The battery pack includes a multi-cell, a connection circuit board connected to the unit cells, a conductive lead drawn out from the connection circuit board, a printed circuit module having an opening into which the conductive lead is inserted, a solder portion formed by solder connection in which the conductive lead is inserted into the opening, wherein the conductive lead has an insertion portion inserted into the opening, a bent portion bent from the insertion portion, and a recess by which the insertion portion is divided.