Volkswagen Ag

Jochen Westhaeuser

Jan-Christoph Albrecht

Arne-Christian Voigt

Carsten Wachsmuth

Peter Hellmann

Sven Twenhoevel

Frank Juergen Engler

A heat pump for a motor vehicle includes a refrigerant circuit with a refrigerant, an ambient heat exchanger, a compressor, a heating heat exchanger, and a throttle. A method for operating the heat pump includes determining an expected start time of a charging process of a motor vehicle battery and determining a maximum dew point undershoot and/or a maximum frost mass and operating the heat pump such that the maximum dew point undershoot and/or the maximum frost mass are reached within a predefined time period before the expected start time.

Method for operating a heat pump for a motor vehicle and heat pump

A method for controlling the charging process of an electrical energy storage device, at an electric charging device, wherein the charging device has a temperature control system and the energy storage device has a temperature control system, including at least the following steps: transfer of electrical energy between the charging device and the energy storage device, transfer of thermal energy between a temperature control system of the charging device and the temperature control system of the energy storage device, and transmission of at least one first item of information from a computing unit associated with the charging device to a computing unit associated with the energy storage device, and/or transmission of at least one second item of information from a computing unit associated with the energy storage device to a computing unit associated with the charging device.

Method for controlling charging process of electrical energy storage device and matching transfer of electrical energy and thermal energy, and charging device

A method for operating a heat pump of a motor vehicle that includes a compressor, an expander, an ambient heat exchanger and a heating heat exchanger. In the method, a defrost mode for defrosting the ambient heat exchanger is initiated. In the defrost mode, a refrigerant is compressed to a high pressure by the compressor to transfer thermal energy to the ambient heat exchanger, the refrigerant is expanded to a low pressure by the expander, and the refrigerant absorbs thermal energy in the heating heat exchanger. Further, a defrosting process of the ambient heat exchanger triggered by the defrost mode is monitored. The monitoring of the defrosting process includes monitoring the pressure difference between the high pressure and the low pressure and/or monitoring the pressure gradient of the pressure difference between the high pressure and the low pressure and/or monitoring the high pressure.

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Braunschweig, Germany

Jochen Westhaeuser