In recent years, domestic automation engineering machinery industry is developing rapidly, has made huge achievements, its scale has become a pillar industry in the national economy sectors. However, the speed has improved significantly, the quality is not achieved a great leap forward, this is the construction machinery industry and domestic industries are persistent problems, low technological content of products, lack of innovation, enterprise management mechanism is not perfect, the market order disorder, etc. it is these defects restrict the further development of the domestic construction machinery industry, only to strengthen the internal strength in order to compete in the market place, avoiding submerged in the river in a homogeneous product.

Existing lithium-ion batteries used in vacuum liquid injection process injection of machines can be broadly divided into two categories: one is suck the liquid injection mode, the principle is to be priming the battery into a container filled with electrolyte. II is easy to make in this manner is injected into the interior of the battery and the injection amount of the liquid electrolyte predetermined amount of liquid required to produce a large variation, resulting in a large error injection amount of the liquid; liquid injection quantity can not be guaranteed and each battery We are equal.