The invention provides a flexibly packaged battery pack which comprises a left end plate, a right end plate, a plurality of monomers, a plurality of connecting plates, a battery pack general positive connecting portion and a battery pack general negative connecting portion. The monomers are arranged between the left end plate and the right end plate; the monomers are arranged between the battery pack general positive connecting portion and the battery pack general negative connecting portion via the connecting plates to form series connection and/or parallel connection circuits. The flexibly packaged battery pack has the advantages that the flexibly packaged battery pack in a novel flexibly packaged group mode is high in universality, good in heat dissipation property and suitable for structures in diversified series-parallel connection modes; the flexibly packaged battery pack can be reliably fixed and is good in heat dissipation property; the lengths and the quantity of the connecting plates can be changed, so that battery packs with diversified series-parallel connection structures can be formed, and the flexibly packaged battery pack can adapt to need of battery packs with diversified dimensions and different output requirements.