Method of operating an electric vehicle and electric vehicle

A method for operating an electric vehicle that includes a first energy storage device, a second energy storage device, an energy supply unit adapted to provide energy to charge the first energy storage device and/or the second energy storage device, and a first electrical consumer connected to the second energy storage device via an intermediate circuit, the first energy storage device being connected to the energy supply unit via a bidirectional converter unit, the second energy storage device being connected to the energy supply unit, comprising:

• delivering a first power flow from the first energy storage device to the second energy storage device in response to an intermediate circuit voltage in the intermediate circuit falling below a predefinable voltage;
• and
• preventing a second power flow from the second energy storage device to the first energy storage device;
• wherein energy is supplied to the energy supply unit with or without contact and/or energy is supplied to the energy supply unit periodically during a trip.

An electric vehicle, comprising:

• a first energy storage device;
• a second energy storage device;
• an energy supply unit adapted to provide energy to charge the first energy storage device and/or the second energy storage device;
• a first electrical consumer connected to the second energy storage device via an intermediate circuit;
• wherein the first energy storage device is connected to the energy supply unit via a bidirectional converter unit;
• wherein the second energy storage device is connected to the energy supply unit;
• and
• wherein the vehicle is configured to deliver a first power flow from the first energy storage device to the second energy storage device in response to an intermediate circuit voltage in the intermediate circuit falling below a predefinable voltage and to prevent a second power flow from the second energy storage device to the first energy storage device at all times.

An electric vehicle, comprising:

• a first energy storage device;
• a second energy storage device;
• an energy supply unit adapted to provide energy to charge the first energy storage device and/or the second energy storage device;
• a first electrical consumer connected to the second energy storage device via an intermediate circuit;
• wherein the first energy storage device is connected to the energy supply unit via a bidirectional converter unit;
• wherein the second energy storage device is connected to the energy supply unit;
• wherein the vehicle is configured to deliver a first power flow from the first energy storage device to the second energy storage device in response to an intermediate circuit voltage in the intermediate circuit falling below a predefinable voltage and to prevent a second power flow from the second energy storage device to the first energy storage device at all times;
• and
• wherein the vehicle is adapted to perform a method that includes:
• delivering the first power flow from the first energy storage device to the second energy storage device in response to the intermediate circuit voltage in the intermediate circuit falling below the predefinable voltage;
• and
• preventing the second power flow from the second energy storage device to the first energy storage device at all times.