关键词: 新能源汽车；电池包下箱体；生产工艺

Abstract: The battery pack lower box is a key component of new energy vehicles, which can provide protection for the battery pack and support the overall structure of the battery pack, and also affect the side impact performance, driving range and service life of the vehicle. In this paper, the advantages and disadvantages of the main production processes such as steel stamping, high strength steel roll pressing, steel aluminum mixing, aluminum alloy extrusion and aluminum alloy die casting are analyzed. The recommended index table for the design, development and application of the battery pack box is summarized, which is helpful to quickly select a reasonable production process of the battery pack box during the project development. This improves the production efficiency of the battery pack lower box, reduces production costs, adapts to market demand, and promotes the development of the new energy vehicle industry.

Key words: New energy vehicles; Battery pack lower box; Production process