BATTERY PACK

A battery pack is provided. The battery pack includes a battery cell including an electrode extending in a first direction, a circuit portion connected to the electrode of the battery cell, and a connection portion forming a connection between the electrode of the battery cell and the circuit portion, the connection portion including a conductive thermocompression bonding layer and a conductive pad layer having a concave accommodation space formed in a second direction intersecting with the first direction to accommodate a portion of the conductive thermocompression bonding layer.