Battery pack mainly refers to the processing, assembly and packaging of lithium battery packs. The process of assembling lithium battery cells into groups is called PACK, which can be a single battery or a lithium battery pack connected in series and parallel. PACK includes battery pack, bus bar, flexible connection, protection board, outer packaging, output (including connector), barley paper, plastic bracket and other auxiliary materials.

The lithium battery PACK system uses a mechanical structure to connect many individual cells in series and parallel, and considers the system's mechanical strength, thermal management, and BMS matching. Its main technology is embodied in the overall structure design, welding and processing technology control, protection level, active thermal management system, etc.