A battery module (100), comprising a plurality of batteries (200), two casings (300), and two electrode plates (400). The two ends (210, 220) of the battery are respectively secured inside the casings (300), each casing (300) comprising a plurality of protruding blocks (310), and a plurality of air flow channels (P1) being disposed between the protruding blocks (310). The electrode plates (400) are respectively arranged between the two ends (210, 220) of the battery and the shells (300).