Batteries are disclosed that include a plurality of cooling plates, a plurality of cells disposed between adjacent cooling plates, a plurality of insulating sheets disposed between adjacent cells, a plurality of bus bars interconnecting the plurality of cells, an inner casing surrounding the plurality of cooling plates, the plurality of cells, the plurality of insulating sheets, and the plurality of bus bars, an outer casing surrounding the inner casing so as to form a gap therebetween, a layer of insulating material disposed inside at least a portion of the gap, and several other structural features in different embodiments of the invention configured to prevent motion of the cells relative to one another.