Abstract: The invention relates to an intermediate storage facility for battery units, having a multiplicity of battery units, having an inverter and/or rectifier, a power supply system and a controller, wherein each battery unit has at least one chargeable battery cell and a battery management system for monitoring and regulating the battery cell, at least two battery units are connected electrically in series to form a battery chain, the battery chain is electrically connected to the power supply system via the inverter and/or rectifier, and the controller has a communication connection to all the battery management systems and is configured to bring about charging of the battery cell with electrical energy from the power supply system, to feed electrical energy in to the power supply system by discharging the battery cell and/or to bring about connection and/or disconnection of the battery unit to or from the inverter and/or rectifier.

Abstract: Energy storage device for storing electric energy for the partial or complete electrical drive of a vehicle, wherein the device has energy storages and power storages, a drive unit of a vehicle with an energy storage device as well as method for operating an energy storage device.

Abstract: Energy storage device for storing electric energy for the partial or complete electrical drive of a vehicle, wherein the device has energy storages and power storages, a drive unit of a vehicle with an energy storage device as well as method for operating an energy storage device.