Converter of energy storage system and energy storage system

The utility model relates to a converter of an energy storage system and the energy storage system, the converter comprises a conversion module, a first terminal, a second terminal and a third terminal, and the conversion module is connected with the first terminal, the second terminal and the third terminal; the first terminal is used for connecting a DC bus, and the second terminal and the third terminal are used for connecting a battery. The conversion module is respectively connected with the direct current bus and the battery through three terminals, so that external connecting wire harnesses and connecting devices can be saved, the current of the battery is adjusted through the converter, and the system cost is effectively reduced. 本申请涉及一种储能系统的变换器和储能系统，变换器包括：变换模块、第一端子、第二端子和第三端子，变换模块连接第一端子、第二端子和第三端子；第一端子用于连接直流母线，第二端子和第三端子用于连接电池。采用变换模块通过三个端子分别连接直流母线和电池，可节省外置连接线束和连接器件，通过变换器对电池进行电流调节，有效降低了系统成本。