BATTERY MODULE

The present disclosure provides a battery module capable of reducing process dispersion from welding of a bus bar to a battery cell. The battery module includes a plurality of battery cells, a bus bar configured to electrically connect at least two of battery cells, and bonding portions configured to bond the battery cells to the bus bar. Each of the bonding portions includes a first bonding portion formed on a first region of one of the battery cells, and a second bonding portion formed on a second region of the battery cell, with the second bonding portion being larger than the first bonding portion.