Semi-immersed battery box

A semi-immersed battery box comprises a battery box body and a battery module, the battery module comprises a plurality of battery cells, the battery cells are installed in the battery box body, a fire-fighting cavity is formed in the area between the outer sides of the battery cells and the battery box body, a partition plate is arranged on the outer sides of the battery cells and divides the fire-fighting cavity into an upper heat production area and a lower heat production area, and the upper heat production area is communicated with the lower heat production area. A liquid inlet and a liquid outlet are formed in the battery box body, the liquid inlet and the liquid outlet are both communicated with the lower heat production area, cooling liquid containing a volatile fire extinguishing agent circulates in the lower heat production area, a waterproof ventilation valve is arranged on the isolation plate, the battery cell comprises a battery cell anti-explosion valve, and the outer side of the battery cell an