The invention relates to the field of batteries, and discloses a battery pack. The battery pack (1) comprises a battery unit (10). The battery unit (10) comprises a plurality of single batteries (100), a connecting component (11) is arranged on each single battery (100), and the battery pack (1) further comprises a supporting component (12) which can be matched with the connecting components (11)to connect the connecting components (11) of the adjacent single batteries (100). According to the invention, the connecting components are arranged on the single batteries of the battery pack, and the supporting components which can be matched with the connecting components are further arranged in the battery pack so as to connect the connecting components of the adjacent single batteries, so that the overall structure of the battery pack is firm.