BATTERY MODULE HAVING ENHANCED WELDING RELIABILITY AND MEDIUM OR LARGE BATTERY PACK INCLUDING SAME

摘要

The present invention relates to a battery module in which a plurality of plate-shaped battery cells are sequentially laminated. The battery module is characterized in that: the battery module comprises two or more cell units which are laminated and serially connected; and each cell unit further comprises two or more battery cells which closely contact each other and are connected in parallel, wherein the parallel connections between the electrode leads of the battery cells in the cell units are comprised of one-to-one welding, each having one welding point.