Energy Storage Underbody for a Motor Car Body-in-White

An energy storage underbody for a motor car body-in-white has a vehicle floor laterally delimited by side sills and reinforced by side members and/or cross members. An energy storage device is disposed on the underside of the vehicle floor. In order to obtain an energy storage device of particularly simple construction and a particularly economical, stiffened underbody, the energy storage underbody has at least one housing of the energy storage device, the housing being non-load bearing in terms of the body-in-white, and has at least one additional side member or cross member disposed on the topside of the vehicle floor to reinforce the underbody.