The utility module relates to a battery box for a passenger car. The battery box comprises a box body, a fuse, a fan and a fuse mounting seat which is arranged in the box body; the mounting seat comprises a plate-shaped base body, a fuse fixing structure and a columnar fan fixing seat, wherein the plate-shaped base body is vertically mounted in the box body, the fuse fixing structure is fixedly arranged on the plate-shaped base body, and the columnar fan fixing seat is fixedly arranged on the plate-shaped base body; the fan fixing seat is provided with a fan mounting hole; the fan is fixedly arranged in the fan mounting hole; and the plate-shaped base body is provided with a bottom and a top, wherein the bottom faces to the bottom face of the box body, and the top faces to an upper cover of the battery box. According to the battery box for the passenger car, the fan fixing seat, besides the fuse fixing structure, is further fixedly arranged on the plate-shaped base body of the fuse mounting seat, thus, the fuse and the fan can be simultaneously mounted on the mounting seat, and then, the structure is compact; and compared with the prior art that the fan and the fuse are respectively mounted on mutually-independent mounting structures, the space of the battery box is saved, and meanwhile, as the mounting is simple and the mounting structures are not required for being manufactured respectively, the materials are saved and the cost is reduced.