New energy automobile already became important roles in chinese automobile industry development in consideration to energy saving and light weight trend in automobile industry around world.Automobile die casting industry are benefited from new energy automobile development.Die casting technology will be improved on light weight and integration. The automotive die casting parts is the largest market for aluminum die castings. Due to the environmentally friendly and cost-effective features, aluminum is lighter than steel and makes vehicles more fuel-efficient to operate. More and more automotive manufacturers are turning to it. In addition to the lightweight of the body structure, the battery pack itself also needs to be lightweight. The lightweight of the battery housing is one of the directions of efforts.