Referring to FIGS. 1 through 6, the battery module 1 may include one or more cell assemblies or cell stacks B and the module housing 5 in which the one or more cell assemblies B are accommodated. The module housing 5 may include: a main housing H including a main boundary portion M surrounding an accommodation space G in which the cell assembly B is accommodated; the first plate P1 including a first boundary portion P1a coupled to the main boundary portion M and a first exposure portion P1b exposed from the main boundary portion M and defining a side of a cooling fluid passage F for cooling the accommodation space G; and the second plate P2 arranged to face the first plate P1 and including a second boundary portion P2a coupled to the main boundary portion M and a second exposure portion P2b exposed from the main boundary portion M and defining the other side of the cooling fluid passage F.
The main housing H may form the accommodation space G of the cell assembly B. The main housing H may define a plurality of accommodation spaces G for accommodating the one or more cell assemblies B and may include the main boundary portion M surrounding each of the plurality of accommodation spaces G. According to some embodiments, the main housing H may include first through fourth accommodation spaces G1, G2, G3, and G4 accommodating different cell assemblies B, respectively, and the main boundary portion M may surround each of the first through fourth accommodation spaces G1, G2, G3, and G4.
