Provided are battery modules. Each module may comprise an enclosure having a base, the base having a plurality of first holes disposed therein, the enclosure including a coolant input port, a coolant output port; the enclosure having a coolant sub-system for circulating coolant being directed into the enclosure through the coolant input port and the plurality of first holes and out of the enclosure through the coolant output port; a center divider affixed to the enclosure; a module cover coupled to the enclosure at an opposite end of the module from the center divider; a retainer disposed within the enclosure and configured to support a plurality of cells; a current carrier disposed between the module cover and the retainer; and the plurality of cells disposed between the current carrier and the center divider, the cells being coupled to and supported by the retainer.