The invention relates to the interaction of thermal management and charging management when a motor vehicle is charged externally.
Plug-in hybrids and electric vehicles are known which can be charged externally. It is also known to control the temperature of the battery during the charging process.
Controlling the energy distribution during the charging process is frequently inflexible and/or overly complicated.
It is therefore the object of the present invention to flexibly and uncomplicatedly control the distribution of energy to different systems for cooling and/or heating during a charging process of a motor vehicle.
This object is attained with the inventions described in the independent claims. Advantageous embodiments are recited in the dependent claims.
The thermal management of a motor vehicle controls cooling/heating of components implemented in form of a motor, a battery, power electronics, etc., as well as cooling/heating of passenger compartment, seats, steering wheel, etc., that provide comfort. The charging management controls the energy supply of a vehicle from an external source.
In a control method for a motor vehicle, several types of power demands can be transmitted from the thermal management to the charging management, including
The invention is based on the observation that energy supply and energy distribution by the charging management can be best controlled when the charging management is aware of the power demands and the priority of the power demands of the thermal management.
Preferably, a cooling power demand for components has a higher priority than a heating power demand for components, because overheating of the components is more likely to cause damage than undercooling.
Preferably, a heating power demand for components has a higher priority than a comfort power demand for passenger comfort.
Preferably, more power is provided by the charging management for a power demand having a higher priority than for a power demand having a lower priority, when sufficient power is not available to satisfy all power demands.
In particular, a power quota is transmitted from the charging management to the thermal management which indicates how much power is supplied to the thermal management. This need not be performed specifically according to the different types of the power demand, so that the thermal management can independently apportion the parts of the quota to the individual types of power.
Alternatively or in addition, a message is transmitted from the charging management to the thermal management which indicates that a comfort power should be provided. The thermal management is hereby informed that sufficient power is available so as to also implement a comfort power.
A motor vehicle includes a thermal management system and a charging management system, wherein several types of the power demand can be transmitted from the thermal management system to the charging management system, which include
Additional features and advantages of the invention are described in the description of an exemplary embodiment with reference to the drawing. The figure shows a motor vehicle 1.
The motor vehicle 1 includes an energy storage device 2 in form of a traction battery. The motor vehicle 1 is in particular a plug-in hybrid or an electric vehicle having a drive which derives drive energy from the energy storage device 2.
The energy storage device 2 can be charged by a charging process and also be discharged, as needed. For this purpose, the energy storage device 2 is connected to a charging management system 3 in form of a converter with a corresponding control. The converter is in turn connected with a power contact 4 at the vehicle side, wherein a charging cable for connecting with a charging station 5 is plugged into the power contact 4.
The thermal management system 6 communicates via a CAN bus with the charging management system 3 of a climate control system 7 for controlling the climate of a passenger compartment of the motor vehicle 1 and a heating/cooling system 8 for the components converter and battery 2.
Transmittable from the thermal management system 6 to the charging management system 3 are
Transmittable from the charging management system 3 to the thermal management system 6 are
With this type of control, the energy from the external source 5 is optimally allocated to the loads.
Number | Date | Country | Kind |
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10 2010 021 028.5 | May 2010 | DE | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/EP2011/002344 | 5/12/2011 | WO | 00 | 1/29/2013 |