Abstract: An energy cell holding device for an energy storage device, in particular a rechargeable battery pack, is disclosed. The energy cell holding device includes at least one cell holder unit for receiving at least one energy cell, the cell holder unit having at least one cell holder element which at least partially delimits at least one energy cell receiving region, in particular a single energy cell receptacle, for the energy cell. The energy cell holding device further includes at least one clamping unit which has at least one clamping element provided for clamping the energy cell which can be arranged in the energy cell receiving region in the cell holder element when the energy cell is arranged in the energy cell receiving region. The clamping unit has at least one further clamping element which is designed to additionally clamp the energy cell which can be arranged in the energy cell receiving region.