Battery box and manufacturing method thereof

The invention discloses a battery box, which comprises a left baffle plate, a right baffle plate, a front panel, a back panel, an upper cover plate and battery carriers. The left and right baffle plates are connected with a framework respectively; the battery carries are arranged at the two ends of the battery box and are connected with the battery frames of the left and right baffle plates respectively. The battery box is characterized in that: vertical edges of the left and right baffle plates are bent inwards respectively to form bent parts; the bent parts form baffle plate slots with the framework parts positioned besides corresponding vertical edges; the vertical edge parts of the front and back panels preserves insertion parts respectively; and the insertion parts are inserted into and connected with the corresponding the baffle plate slots respectively. The baffle plate slot structure can be formed simply by one step. Compared with the prior art which needs a plurality of bending processes to form an i