Battery module

The purpose of the present invention is to provide a battery module having high volumetric efficiency. This battery module is obtained by overlapping and connecting a plurality of single cells, each single cell having a power generating element, a positive electrode terminal, and a negative electrode terminal positioned on the opposite side of the power generating element from the positive electrode terminal. A laminated connection layer including a resin layer, a metal layer, and a resin layer in this order is disposed between the single cells, and the metal layer of the laminated connection layer is connected to the positive electrode terminal of one adjacent single cell and the negative electrode terminal of another single cell. 本发明的目的在于提供一种体积效率高的电池模块。本发明的电池模块是将多个单电池重叠并连接而成的电池模块，所述单电池具有发电元件、正极端子、以及相对于该发电元件位于与该正极端子相反一侧的负极端子，其特征在于，在各个所述单电池之间配置按顺序包含有树脂层、金属层、树脂层的层压连接层，所述层压连接层的所述金属层与相邻的一个单电池的正极端子以及另一个单电池的负极端子连接。