Battery assemblies have been provided. In an embodiment, by way of example only, a battery assembly includes a casing including a plurality of walls defining a coolant chamber and a battery cell pocket disposed in the coolant chamber including a container section, a lip, and a first spacer, the lip surrounding the container section and including a casing adjoining section and a pocket adjoining section, the casing adjoining section configured to couple to the casing, and the pocket adjoining section configured to couple to an adjacent lip of an adjacent battery cell pocket, and the first spacer protruding outwardly from the container section.