ENERGY STORAGE SYSTEM AND ENERGY STORAGE POWER STATION

An energy storage system includes a battery module, a converter, and a cooling device. The cooling unit of the cooling device is connected to the first liquid inlet and the second liquid outlet through pipelines. The bypass structure is configured to communicate the first liquid outlet with the second liquid inlet and can bypass a portion of a cooling liquid discharged from the first liquid outlet to outside the second liquid inlet. Therefore, only a portion of the cooling liquid enters the second cooling structure from the first cooling structure, allowing only a single cooling device to meet the different flow rate requirements of the first cooling structure and the second cooling structure.