Energy storage device to which hook structure is applied and energy storage system including the same

摘要

An energy storage device according to an embodiment of the present invention includes a battery rack fixedly installed in a building or a container, and having a space defined for inserting a battery module, and a plurality of battery racks arranged in the battery rack. An energy storage device including: the battery module, wherein the battery module is slidably inserted into the battery rack, and a front portion of the battery module is fixed to the battery rack by a bolting method. The rear surface of the battery module is fixed to the battery rack by a hook method.