The invention discloses a battery pack structure, and provides a battery pack structure, which has the advantages that the structure is simple, the safety and reliability are realized, the assembly process is convenient and rapid, and the manufacturing cost is reduced. The battery pack structure solves the technical problems of complicated and long assembly process of a battery pack, waste of time and labor, consumption of a large amount of manpower and material resources, poor safety and reliability, failure to ensure the quality of a battery pack product and the like in the prior art. The battery pack structure comprises a box body, wherein the box body is used for placing battery cells; the inner ring surface of the box body corresponding to the outer ring surface of each battery cell extends inwards to form a battery cell fixing plate; the bottom surface, corresponding to the bottom surfaces of the battery cells, of the box body extends inwards to form a plurality of limiting bosses; the battery cell fixing plates and the limiting bosses together define a battery cell module space, and the battery cells are assembled and installed in the battery cell module space, and are clamped into limiting grooves formed by the adjacent limiting bosses.