Battery box

The invention discloses a battery box. The battery box comprises a frame body, a battery pack, a connector and a water chilling unit, the frame body is provided with a main frame and a lower frame connected with the main frame, the main frame is provided with an upper cavity, and the lower frame is provided with a lower cavity. And the battery pack is arranged in the upper cavity. The connector is arranged on the lower frame, and the connector is electrically connected with the battery pack. At least part of the water cooling unit is arranged in the lower cavity, and the water cooling unit is communicated with a cooling pipeline in the battery pack. According to the battery box, the water cooling unit is arranged in the lower cavity, the spaces on the two sides of the connector are fully utilized, the problem that the water cooling unit is arranged at the top of the main frame and occupies a large space is solved, the whole battery box is small in height and size, all modules of the whole battery box are reas