A prismatic cell cooling system includes a first prismatic cell having a first face, a second face angularly oriented to the first face and a third face oriented parallel to the first face and angularly oriented to the second face. A cooling jacket provides multiple coolant flow passages. A first cooling segment of the cooling jacket contacts one of the first face or the third face of the first prismatic cell. A second cooling segment of the cooling jacket directly contacts the second face of the first prismatic cell. The second cooling segment is contiguously and fluidly connected to the first cooling segment to promote simultaneous cooling of one of the first face or the third face and the second face of the first prismatic cell by flow of a coolant through the coolant flow passages.