Heat dissipation assembly of energy storage battery box and energy storage battery box

The utility model provides a heat dissipation assembly of an energy storage battery box and the energy storage battery box. The heat dissipation assembly of the energy storage battery box comprises: an air source having a cold air outlet for blowing out cold air; the air duct shell is constructed to be used for transferring heat of the plurality of battery packs; the air guide structure is located in the air duct shell, the air guide structure divides the interior of the air duct shell into a main air duct extending along the first axis and a plurality of secondary air ducts located on one side of the main air duct, and the multiple secondary air ducts are sequentially arranged along the first axis; an inlet and an outlet of each secondary air duct are both communicated with the main air duct, and the cold air outlet is communicated with an air inlet of the main air duct, so that cold air at one end of the main air duct is shunted through the inlets of the secondary air ducts and then converged to the other e