Thermal insulation shell of battery module and charging trailer

The utility model discloses a heat preservation shell of a battery module and a charging trailer, and the heat preservation shell of the battery module comprises a shell which is internally provided with an accommodating space for accommodating the battery module; wherein an opening is formed in the top of the shell, and a detachable cover plate is arranged at the opening; a gap exists between the side wall of the shell and the battery module, and the gap is used for placing a heat release assembly; and the heat release assembly is inserted into the gap from the opening. The heat preservation shell of the battery module is mainly characterized in that the side face of the shell makes contact with outside air, particularly, the outer battery in the battery module is prone to being cooled, the temperature of the batteries is low, and the temperature of the inner battery in the battery module is relatively high, and therefore the heat release assembly is arranged between the side wall of the shell and the batter