Battery pack comprising electrode terminal connection plate

Abstract

The present disclosure provides a battery pack including a plurality of cylindrical battery cells forming a clamping part by coupling a cap assembly on one opened surface of a cylindrical can and forming a first electrode terminal and a second electrode terminal on a top surface of the clamping part and a top end central portion of the cap assembly, respectively, and a first electrode terminal connecting plate simultaneously coupled to upper end surfaces of the clamping parts of the battery cells in a state in which cylindrical battery cells are laterally arranged so that the cap assemblies of the cylindrical battery cells head in the same direction. The first electrode terminal connecting plate includes a welding plate having a relatively thin thickness to be welded on the upper end surface of the clamping part of the cap assembly, and a conductive plate coupled to a top surface of the welding plate, which is opposite to the cap assembly, and having a relatively thick thickness in comparison with that of the welding plate for smooth current flow between first electrode terminals of the upper end surface of the clamping part.