Safety monitoring device, battery module and battery pack

The utility model provides a safety monitoring device, a battery module and a battery pack, and relates to the technical field of power batteries. The safety monitoring device comprises a copper bar structure which is provided with a connecting end; the module output electrode is configured at the connecting end, and the module output electrode is respectively connected with the copper bar structure and the battery monomers; and the locking force sensing structure is configured at the connection position of the copper bar structure and the module output pole and is used for collecting the torsion of the connection of the copper bar structure and the module output pole. The locking force sensor structure is arranged at the connection position of the copper bar structure and the module output pole, and when the module output pole is fixed on the copper bar structure, the torsion of the connection between the module output pole and the copper bar structure can be monitored in real time, so that feedback and earl