MULTI-BATTERY PACK HAVING COMPACT STRUCTURE

The present invention relates to a multi-battery pack including a plurality of stacked battery packs and a plurality of long bolts configured to couple the plurality of battery packs to each other and to fix the plurality of battery packs to a device, wherein each of the battery packs includes a plurality of battery cells and a case configured to receive the plurality of battery cells therein, the case includes a case frame defining a space configured to receive the battery cells therein, the case frame being provided at an outside thereof with a plurality of through-holes through which the long bolts are inserted, a lower cover coupled to a lower part of the case frame, and an upper cover coupled to an upper part of the case frame, and the upper cover includes a circular first fastening hole and a second fastening hole having one side open in a C-shape, the first fastening hole and the second fastening hole being configured to allow the long bolts to be fastened therethrough.