Battery pack, comprising: a battery accommodation box, comprising a box body and a cover body, wherein the box body fits with the cover body to form an accommodation space; a partition beam, disposed in the accommodation space to partition the accommodation space into a plurality of accommodation units, wherein the partition beam comprises a hitch beam that extends in a first direction parallel to a bottom wall of the box body, a bottom of the hitch beam is fixed to the bottom wall of the box body in a third direction perpendicular to the bottom wall of the box body, and a top of the hitch beam is connected to the cover body; and a plurality of battery modules, wherein the battery modules comprise a plurality of battery cells, and each battery module is disposed in a corresponding accommodation unit; wherein, in the third direction, the top of the hitch beam is higher than a top of the battery cells; the battery accommodation box further comprises a cantilever beam, the cantilever beam is fixedly connected to an outer side of a bottom of the box body, wherein bulges protruding outward from side walls of the box body are disposed at two ends of the cantilever beam, and second hitch points configured to connect the battery pack to a vehicle body are disposed on the bulges; the cantilever beam extends in the first direction and is arranged alternately with the hitch beam in a second direction, and the second direction is perpendicular to the first direction and parallel to the bottom wall of the box body; and wherein a first hitch point configured to connect the battery pack to a vehicle body is disposed at the top of the hitch beam. a battery accommodation box, comprising a box body and a cover body, wherein the box body fits with the cover body to form an accommodation space; a partition beam, disposed in the accommodation space to partition the accommodation space into a plurality of accommodation units, wherein the partition beam comprises a hitch beam that extends in a first direction parallel to a bottom wall of the box body, a bottom of the hitch beam is fixed to the bottom wall of the box body in a third direction perpendicular to the bottom wall of the box body, and a top of the hitch beam is connected to the cover body; and a plurality of battery modules, wherein the battery modules comprise a plurality of battery cells, and each battery module is disposed in a corresponding accommodation unit; wherein, in the third direction, the top of the hitch beam is higher than a top of the battery cells; the battery accommodation box further comprises a cantilever beam, the cantilever beam is fixedly connected to an outer side of a bottom of the box body, wherein bulges protruding outward from side walls of the box body are disposed at two ends of the cantilever beam, and second hitch points configured to connect the battery pack to a vehicle body are disposed on the bulges; the cantilever beam extends in the first direction and is arranged alternately with the hitch beam in a second direction, and the second direction is perpendicular to the first direction and parallel to the bottom wall of the box body; and wherein a first hitch point configured to connect the battery pack to a vehicle body is disposed at the top of the hitch beam.