A battery module increases heat dissipation by causing electronic cooling to occur at a breakdown voltage or higher, a battery pack including the battery module and a vehicle including the battery pack. The battery module includes a battery cell assembly having a plurality of battery cells and lead junction parts in which respective leads of the battery cells are joined to each other includes a thermoelectric device in which a heat absorbing portion is located on surfaces of the battery cells which are located at both outsides among the battery cells in the battery cell assembly, which correspond to a side surface of the battery cell assembly; and a constant voltage device configured to divert a current of the battery module to the thermoelectric device when an overcharge of the battery module occurs, to electronically cool the battery module when the overcharge of the battery module occurs.