Heat storage system and heat storage module thereof

The invention discloses a heat storage system and a heat storage module thereof, and the heat storage module comprises a shell which is internally provided with an inner cavity for accommodating a phase change heat storage material; the at least three heat exchangers are arranged in the inner cavity; wherein one part of the heat exchangers are used for charging heat to the phase change heat storage material, the other part of the heat exchangers are used for releasing heat of the phase change heat storage material outwards, and the number of the heat exchangers used for charging heat to the phase change heat storage material is at least two or the number of the heat exchangers used for releasing heat of the phase change heat storage material outwards is at least two. According to the technical scheme, the technical problems that an existing heat storage module is low in external heat release efficiency and low in power, and heat charging and heat release can be achieved only through cooperation of a complex e