Split type battery box automatic fire extinguishing device

The utility model discloses a split type battery box automatic fire extinguishing device comprising a battery box, a battery box upper cover, a fire extinguisher and a fire signal processor, wherein at least one battery cell is arranged in a cavity, a temperature sensing fire detector and the fire extinguisher are arranged above the battery cell, the temperature sensing fire detector and the fire extinguisher are both electrically connected with a control circuit of the fire signal processor, the battery box is a rectangular cavity with an opening in the upper part, the battery box upper cover is a rectangular cavity with an opening in the lower part, the battery box upper cover is matched with the battery box, a separating net is arranged in the cavity of the battery box upper cover, and the fire extinguisher and the fire signal processor are both arranged above the separating net. According to the split type battery box automatic fire extinguishing device disclosed by the utility model, all fire distinguishing devices are arranged on the battery box upper cover, so that the maintenance and replacement of the fire extinguisher can be facilitated without influencing the fire extinguishing effects, human and financial resources can be saved, and the working efficiency can be improved.