BATTERY PACK HOUSING, BATTERY PACK, AND VEHICLE

This disclosure provides a battery pack housing, a battery pack, and a vehicle. The battery pack housing includes a box provided with a box installation cavity and a liquid outlet structure. A liquid outlet is provided at a sidewall of the box. The liquid outlet structure is provided with a connection opening and a liquid outlet cavity in fluid communication with the connection opening. The box installation cavity is in fluid communication with the liquid outlet. A first horizontal plane where the connection opening is located is higher than upper surfaces of the plurality of battery cells and a bottom of the liquid outlet cavity, and a second horizontal plane where a bottom end of the liquid outlet is located is lower than the first horizontal plane.