US Patent 10897033 Battery pack for electric power storage device

Disclosed herein is a battery pack configured to have a structure including at least one module assembly configured to have a structure in which battery modules, each of which has a structure in which a plurality of unit cells is stacked in a state in which unit cells are electrically connected to each other, are arranged such that the battery modules are adjacent to each other, a pair of side plates coupled to each other for covering opposite sides of the module assembly, a base plate having fastening parts, which are coupled to the side plates, formed at one surface thereof and an external mounting part, which is mounted to an external structure, formed at the other surface thereof, and a sheathing cover coupled to the base plate while covering the module assembly.