The utility model discloses a lithium cell that utilizes two -phase flow power type separated heat pipe preheats and cooling system relates to battery thermal management technical field, including lithium cell, heat pipe working medium circulation pipeline, central controller and self -loopa heat pipe solenoid valve, still include hot translation unit and power pack. The beneficial effects of theutility model are that, improve security and radiating effect that the lithium cell used, solved lithium cell low problem of performance in low -temperature operation, and then lengthened the life oflithium cell.