Abstract: A battery module includes a housing, a plurality of thermally conductive plates, a plurality of flat cells and a fixing unit. The thermally conductive plates and the flat cells are received in the housing. At least one of the thermally conductive plates is received between two of the flat cells and contacts with at least one of the two of the flat cells. Each of the flat cells respectively has a cell body and at least an electrode connected to and extended from the cell body. The fixing unit is received in the housing, and the electrode is fixed on the fixing unit. The battery module is applied advantageously to integrate the thermal dissipation system with the fixing structure. Additionally, the particular configuration used herein is beneficial to reduce the risk of electrode breakage.