Multi-air duct battery box and battery box assembly

The utility model relates to a multi-air duct battery box and a battery box assembly. The multi-air duct battery box comprises a battery box shell, wherein the shell comprises a left side wall, a right side wall, a front wall, a rear wall, a bottom wall and a cover plate; at least three rows of reinforcing ribs are arranged at the bottom of the shell and are used for limiting and mounting batteries in parallel a left and right manner so as to form a side wall air duct between the side wall and the batteries and a main air duct which is arranged between batteries and is communicated with the side wall air duct through a gap between the battery box and the cover plate and/or the bottom wall when in use; the main air duct is correspondingly provided with rear wall vent holes on the rear wall of the shell; and the side wall air duct is provided with side wall intake holes in the corresponding side wall. According to the novel battery box, due to the arrangement of the reinforcing rib, air ducts are formed when th