High-capacity battery with heat dissipating device

The invention discloses a high-capacity battery with a heat dissipating device. The high-capacity battery consists of a plurality of cylindrical single batteries which are connected in parallel and comprises a fixture and the cylindrical single batteries mounted on the fixture and connected in parallel, as well as longitudinal gaps and transverse gaps, which are formed between the cylindrical single batteries, wherein a radiating fin is inserted into the longitudinal gaps and/or the transverse gaps; a plurality of elastic heat conducting sheets are fixedly arranged on the radiating fin; each elastic heat conducting sheet is provided with an inwardly concave arc surface compressed and fitted onto the outer wall surface of one of the cylindrical single batteries. The high-capacity battery is simple in structure and convenient to assemble; the contact areas between the radiating fin and the cylindrical single batteries are large; the radiating fin and the cylindrical single batteries are guaranteed to be in reliable contact during use, so that the heat radiating efficiency of the high-capacity battery is improved, and meanwhile, the consistency of temperature in the high-capacity battery is guaranteed.