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 (V), wherein the partition beam comprises a hitch beam that extends in a first direction (X) 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 (Z) 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 (V); wherein, in the third direction (Z), 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 (X) and is arranged alternately with the hitch beam in a second direction (Y), and the second direction (Y) is perpendicular to the first direction (X) 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 (V), wherein the partition beam comprises a hitch beam that extends in a first direction (X) 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 (Z) 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 (V); wherein, in the third direction (Z), 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 (X) and is arranged alternately with the hitch beam in a second direction (Y), and the second direction (Y) is perpendicular to the first direction (X) 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 . <EOS>