Power storage module of energy storage system

The utility model relates to the technical field of energy storage, in particular to a power storage module of an energy storage system, which comprises a sealed battery box and a plurality of rows of battery packs, the battery packs are arranged in the battery box, each row of battery packs comprises at least two battery packs, and the battery packs are arranged in the battery box. The battery packs are distributed at intervals along the row direction of the battery groups, a first heat-conducting sheet is arranged between every two adjacent battery packs, and the first heat-conducting sheets are attached to the battery packs; the battery box is sealed, so that external dust and water vapor are prevented from entering the battery box to influence the battery pack, gas in the battery box circulates, and after heat of the battery pack is absorbed by a first heat-conducting fin, the heat is driven into a heat exchange channel by the circulatory gas, so that the heat exchange efficiency of the battery pack is im