Body is the main structure of the forklift, are generally made of more than 5mm steel plate, which is characterized by no beams, body strength, can withstand heavy load. There are two different manufacturing techniques for the placement of the battery on the forklift body, i.e. the battery is placed between the front and rear axles or the rear axle. These two technologies represent two optimal options for self propelled stackers design, each with advantages and disadvantages, good stability, but the body of the available space is small, thus limiting the capacity of the battery, which does not exceed the load capacity of 3t economic stacker is not prominent, but for those who exercise complex, 8h working hours of high capacity battery capacity requirements of large-tonnage forklift becomes serious.