Battery module, and connecting structure of cells in the battery module

摘要

The battery module comprises a plurality of cells (6) encased in prismatic cell cases (3) having short lateral walls and long lateral walls coupled together as one piece. Each of the cells accommodates therein a group of electrode plates (5) and liquid electrolyte, wherein collector plates (31, 32) are connected respectively to the groups of positive and negative electrode plates at opposite lateral edges thereof. Connection holes (7) are formed at upper edge portions of the short lateral walls of the cell cases, and the collector plates are formed with connection bosses (33) that fit into the connection holes, so that the connection bosses of the collector plates in neighboring cells are abutted each other and welded together, whereby two adjacent cells are connected to each other.