Battery pack

The utility model provides a battery pack, which comprises an energy storage assembly, a battery pack and a battery pack, the energy storage assembly comprises a plurality of columnar battery cells extending along a first direction, and the peripheral surfaces of at least three adjacent battery cells are matched to define a heat conduction channel extending along the first direction; the partition plate is arranged at at least one end of the energy storage assembly in the first direction, and a plurality of vent holes are formed in the partition plate and communicate with the heat conduction channel. According to the battery pack disclosed by the utility model, each battery cell in the energy storage assembly can release heat to the outside through the heat conduction channels and the air guide holes, so that the heat dissipation path of each battery cell is shortened, the quick heat dissipation of the middle battery cell is facilitated, the heat of the inner battery cell and the outer battery cell in the ene