ENERGY STORAGE DEVICE FOR STORING ELECTRICAL ENERGY, METHOD FOR MANUFACTURING AN ENERGY STORAGE DEVICE, AND MOTOR VEHICLE

An energy storage device for storing electrical energy. A housing frame of the energy storage device has respective housing end walls on two opposite end faces of the housing frame. The energy storage device has at least one battery cell stack. Respective stack end plates are arranged on two opposite end faces of the battery cell stack, which end plates are fastened in the housing frame of the energy storage device and by which end plates the battery cell stack is subjected to a compressive pressure. The stack end plates are aligned parallel to the housing end walls. At least one of the stack end plates is separated from a housing end wall located opposite to it by a space free of a battery cell stack.