ENERGY STORAGE DEVICE FOR ELECTRIC ENERGY, CHARGING ARRANGEMENT AND METHOD FOR INSTALLING AN ENERGY STORAGE DEVICE OR CHARGING ARRANGEMENT

An energy storage device for electrical energy for charging an electric motor vehicle includes at least one battery module, a housing for accommodating the at least one battery module and a connection device for connection to a power supply for charging the at least one battery module from a power grid, wherein the flat energy storage device has a reinforcing structure which makes it possible for a motor vehicle, in particular a passenger car, to drive over a top surface of the energy storage device arranged on a ground surface which can be driven upon.