Underwater vehicle battery subrack device

The utility model relates to the technical field of underwater vehicles, in particular to a battery subrack device for an underwater vehicle, which comprises a combined shell and is characterized in that a plurality of modules are arranged in the combined shell and are connected through bus bars, water flows in from an inlet, absorbs heat in the modules through cooling plates, and is discharged out of a box through an outlet. One module is connected with the insulation monitoring plate through a bus bar, the insulation monitoring plate is sequentially connected with the fire extinguishing device and the fuse protector, the other module is connected with the current sensor through a bus bar, the current sensor is sequentially connected with the relay, the fuse protector and the connector, and the controller and the anti-explosion valve are installed on the inner side and the outer side of the box body respectively. The outer wall of the box body is provided with a push-pull handle. A water cooling mode is adop