System for detecting poor weld in welded portion of battery module, and method thereof

A system for detecting a poor weld in a welded portion of a battery module, which is to inspect a welded state of the battery module made by assembling a plurality of battery cells to each other, the system comprising:

• a battery module fixation unit fixing the battery module to be inspected;
• an inspection position movement unit moving the battery module fixation unit to a welding inspection position;
• a welding inspection unit including a frictional reaction force measurement unit inducing a movement of the welded portion of the battery module and measuring a frictional reaction force generated thereby, and a vision inspection camera detecting an amount of change in a position of the welded portion of the battery module;
• and
• a control unit determining whether the welded portion of the battery module is poorly welded based on the frictional reaction force and the amount of position change, measured by the welding inspection unit.