BATTERY PACK HAVING CONNECTION PLATES, ELECTRONIC DEVICE, AND VEHICLE

Disclosed is a battery pack having improved weldability between connection plates of a plurality of battery modules. The battery pack includes a plurality of battery modules arranged in a front and rear direction, and each of the plurality of battery modules includes a plurality of secondary batteries; a connection plate having a body portion located at the upper portion or the lower portion of the plurality of secondary batteries and provided with a plurality of connection terminals respectively in electrical contact and connection with the electrode terminal formed at one of the plurality of secondary batteries, and a connection portion configured to protrusively extend in a left direction or a right direction from the body portion so that a part of the protrusively extending portion is bent upward or downward from the body portion and the bent end is bonded to a portion of the other connection plate; and a module housing having a plurality of hollows in which the plurality of secondary batteries are inserted and accommodated, the module housing having a separating groove formed at an outer wall thereof by indenting a portion of the outer wall inward so as to be spaced apart from the bent end of the connection portion at a predetermined interval.