Battery box

The utility model discloses a battery box for among the electric automobile, include: go up the box, be located battery box upper portion, the box lies in the battery box lower part down, and including bottom surface and side, the side lies in the bottom surface is peripheral, and the cavity is enclosed into with the bottom surface in the side, and the outside of bottom surface and side has a plurality of zigzag protrusion respectively. The trapezoidal isosceles trapezoid that is in a plurality of zigzag protrusion's cross -section, isosceles trapezoid's waist is 55 to 65 with the contained angle on base. A plurality of zigzag protrusion are at the outside of bottom surface and side parallel arrangement, be on a parallel with respectively the bottom surface with one side of side to a plurality of zigzag protrusion both ends extend to the planar edge in place. Adjacent a plurality of zigzag protrusion's the trapezoidal base in cross -section is connected. A plurality of zigzag protrusion of the external side o