A battery pack includes a battery pack; a charging housing having an inlet, an outlet, and a pack insertion space into which the battery pack is insertable; a charging part electrically connected to the battery pack inserted into the pack insertion space, for charging the battery pack; a circulation part configured to supply cooling water supplied to the pack insertion space through the inlet and recover cooling water from the pack insertion space through the outlet; a heating part configured to heat to the pack insertion space; and a control part for controlling the charging part, the heating part, and the circulation part.