Abstract: A support structure for one or more energy storage cells in a power pack, and method of assembling. The support structure may comprise one or more separator walls, a plurality of links, or combinations thereof. The separator walls, links or combinations thereof may be couplable/interlockable to form channels that are configured to receive and at least partially encircle an energy storage cell. Each separator wall may comprise a plurality of troughs that each define a concave surface, and a plurality of ridges, each ridge disposed between adjacent troughs. Each link defines a concave surface and is configured to be releasably coupled/interlocked to another link to form a trough or channel. Each trough is configured to receive and partially encircle an energy storage cell.