Heat exchange system and energy storage system

The utility model discloses a heat exchange system and an energy storage system. The heat exchange system is used for exchanging heat with a battery in the energy storage device and comprises a first heat exchanger, the first heat exchanger communicates with a first heat exchange pipeline and an external heat exchange pipeline, and the first heat exchange pipeline and the external heat exchange pipeline are independent of each other and conduct heat exchange in the first heat exchanger; the second heat exchanger communicates with the first heat exchange pipeline and the second heat exchange pipeline, the first heat exchange pipeline and the second heat exchange pipeline are independent of each other and conduct heat exchange in the second heat exchanger, and the second heat exchange pipeline comprises a liquid supply pipeline and a liquid return pipeline which communicate with the second heat exchanger; the liquid supply pipeline and the liquid return pipeline are respectively communicated with the third heat exchanger, and the battery in the energy storage device exchanges heat with the second heat exchange pipeline in the third heat exchanger; and a heat exchange medium flowing in the external heat exchange pipeline is a liquid heat exchange medium.