A battery cell assembly is provided. The battery cell assembly includes a polymeric foam container having first, second, third side walls defining an interior region. The first, second, and third side walls have first, second, and third grooves, respectively, extending therein. The battery cell assembly further includes a first battery cell having a first rectangular-shaped body with first, second, and third peripheral ledge portions. The first battery cell is disposed in the interior region such that first, second, and third peripheral ledge portions thereof are disposed in the first, second, and third grooves, respectively, in the first, second, and third side walls, respectively.