System for controlling a temperature of a tempering medium in a tempering circuit in a motor vehicle, method with the system, computer program, control unit and motor vehicle

Abstract

The present invention relates to a system for controlling a temperature of a tempering medium in a tempering circuit (40) in a motor vehicle (100), having an electric machine (10) which, during a deceleration, recuperates electrical energy to charge an electrical energy store (20), a conversion arrangement (30) which is designed to convert a portion of the recuperated electrical energy (R) into thermal energy (T) which is introduced into the tempering circuit (40), wherein the portion of the recuperated electrical energy (R) is taken directly from the electric machine (10) into the conversion arrangement (30) for energy conversion and a power requirement of the conversion arrangement (30) is controlled as a function of a type of deceleration. The invention further relates to a method for controlling the temperature in the tempering medium, a computer program (150) comprising instructions which, when the program is executed by a computer, cause the computer to carry out the method according to the invention, a control device (160) which is set up to carry out the method according to the invention, and a motor vehicle (100) with the system (1) according to the invention.

Description

The invention relates to a system for controlling a temperature of a temperature control medium in a temperature control circuit in a motor vehicle, and to a method, a computer program, a control device and a motor vehicle.The efficiency of electric vehicles during dynamic driving or in city traffic is largely dependent on the ability to be recuperated with high power. However, the recuperation is limited due to the component, for example by the current capacity in the case of charging of the battery or by the cooling of the electric machine. Therefore, in the real operation, the mechanical brake is often used, thereby degrading the overall efficiency. Fine dust is also generated by the abrasion of the brakes. Particularly in the case of a greater deceleration of the vehicle, the mechanical brake is used in addition to the electrical recuperation. The recuperation limit is usually the continuous power limit of the battery.In known solutions, components with higher performance are often used to increase the recuperation capability, or components which make possible a higher peak performance for a short time. However, this results in higher component costs. In addition, with a higher peak power, a reduced service life of the components can result.Another approach that has been practicable up to now is to restrict the recuperation power more strongly via software, in order to reduce component costs and to increase the service life. However, this approach reduces the efficiency of the drive, which leads to a higher energy consumption during operation.Furthermore, the air conditioner and other consumers draw their necessary electrical energy directly from the battery. This continuous energy throughput additionally reduces the service life of the battery.However, the known solutions do not solve the problems that, in the case of a greater deceleration, the mechanical brake must be used in addition to the electrical recuperation, that energy is lost, that the recuperation is limited by individual vehicle components and that the service life of the components is increased.DE 10 2020 126 659 A1 describes a system for controlling regenerative braking for an electric motor-driven vehicle. In the system, electric energy is generated by an electric motor during regenerative braking. A battery is charged with the electric energy. Once the battery is fully charged, excess electrical energy that cannot be further collected is converted to thermal energy by a brake resistor. Thereby, an auxiliary braking force can be continuously generated by a continuous reverse torque of the electric motor. The conversion of the surplus electric energy into heat energy is turned on and off depending on charge amount information of the battery.DE 10 2015 215 424 A1 describes a method for more quickly heating the interior of a motor vehicle. The necessary electrical energy is taken from either a battery, from an external energy source or from a brake resistor and converted into thermal energy. An electrothermal converter is operated at a higher heating power for a short time at the beginning of a heating period and is then switched to continuous operation at a lower heating power. This allows immediate heating of the interior space to be achieved.WO 2008 / 147305 A1 describes a heating system for a hybrid vehicle. In the heating system, surplus regeneratively generated electric energy is used. When the vehicle is on a grade, a supercapacitor module is fully charged quickly. The resulting surplus electric power is then converted into heat via a resistor unit. A generator coupled to an internal combustion engine may be controlled in a downslope situation to generate more electrical energy than is currently being consumed by the electric drive motor. With the additionally generated electrical energy, a cooling medium can be heated in a shorter time. The converted heat can also be used for heating the interior space.It is an object of the present invention to provide an improved system for controlling a temperature of a temperature control medium in a temperature control circuit in a vehicle, an improved method, an improved computer program, an improved control device and an improved motor vehicle, in which the above-mentioned problems are at least partially solved.This object is achieved by the system according to the invention as claimed in claim 1, the method according to the invention as claimed in claim 10, the computer program according to the invention as claimed in claim 11, the control device according to the invention as claimed in claim 12 and the motor vehicle according to the invention as claimed in claim 13.Further advantageous embodiments of the invention are evident from the dependent claims and the following description of preferred embodiments of the present invention.A first aspect of the invention relates to a system for controlling a temperature of a temperature control medium in a temperature control circuit in a motor vehicle, having an electric machine which recuperates electrical energy for charging an electrical energy store during a deceleration, a conversion arrangement which is designed to convert a portion of the recuperated electrical energy into thermal energy which is introduced into the temperature control circuit, wherein the portion of the recuperated electrical energy is taken directly from the electric machine into the conversion arrangement for energy conversion and a power demand of the conversion arrangement is controlled as a function of a type of the deceleration.The temperature control circuit can serve for air conditioning an interior of the motor vehicle. The interior can be cooled via the temperature control circuit. The interior can be heated via the temperature control circuit. The interior can be cooled and heated via the temperature control circuit. The temperature control circuit can be a cooling circuit. The temperature control circuit can be a water circuit. The temperature control circuit can be used for the air conditioning of vehicle components. This can be, for example, a high-voltage battery.Recuperation using the system according to the invention can be referred to as thermal recuperation.The portion of the recovered electrical energy may be diverted directly from the electric machine. The portion of the recovered electrical energy can be branched off directly during regular operation. A remaining portion of the recovered electrical energy can be used to charge the electrical energy store. The branching off of the part of the recovered electrical energy and the charging of the electrical energy store with the remaining part of the recovered electrical energy can take place simultaneously.The portion of the recovered electric power may be a preset percentage value of the total recovered electric power. The share value may be variably set. The part can be variably set depending on the current driving situation or deceleration.The electrical energy store can be a battery. The electrical energy store may be a traction battery of the motor vehicle.The conversion arrangement may convert a portion of the recovered electrical energy into thermal energy. The thermal energy can be temporarily stored in the temperature control circuit via the conversion arrangement. The temporary storage can be effected via one or more consumers. The consumers can be part of the system according to the invention. For example, a power consumption can be increased at the load in order to temporarily store the thermal energy. The power consumption can be increased in a short-term manner.Additionally or alternatively, one or more additional consumers may be activated. The additional load can buffer the thermal energy. The additional consumer can be activated or deactivated as required. The load can be an electrical resistor. The additional load can be a thermistor, for example. The additional consumer can be a PTC element, for example. The additional load can be a power PTC element, for example. Additionally or alternatively, the temporary storage of the thermal energy can take place via a characteristic map changeover in power electronics of the electric machine. The temporary storage of the thermal energy can take place via a characteristic map changeover in power electronics of a DC-DC converter (DC-DC converter).The power requirement of the conversion arrangement may relate to a power requirement for the air conditioning of the motor vehicle. The power requirement of the conversion arrangement may relate to a power requirement for an air conditioning compressor of the motor vehicle. The power requirement of the conversion arrangement may relate to a power requirement for heating the motor vehicle. The power requirement of the conversion arrangement may relate to a power requirement for an air conditioning compressor and a heater of the motor vehicle. The power requirement of the conversion arrangement may be an air conditioning power.The manner of delay includes different delays. The power requirement of the conversion arrangement is controlled as a function of the delay. The different decelerations result from different driving situations of the motor vehicle. Control depending on a manner of the delay may be performed before, during, or after the delay.Control may be effected depending on an imminent deceleration. The imminent deceleration can be determined, for example, by means of a prediction.Control may be performed depending on a request for delay (delay request). The request for deceleration may come from a driver. The request can come from a pedal position. The request for deceleration may come from an automatic cruise control (ACC). The request for deceleration may be via an autonomously controlled vehicle (AD).Control may be effected in dependence on a preceding delay.The manner in which the delay is applied or taken into account in the system depends on the embodiment of the system according to the invention. The system of the invention may involve one or more ways of delay to control. The control can also comprise a regulation in the context of the invention.With the system according to the invention, additional thermal energy can be introduced into the temperature control circuit and temporarily stored. The input of the additional thermal energy varies depending on the manner of the delay. As a result, a dynamic control of the temperature of the temperature control medium in the temperature control circuit can take place as a function of the type and manner of the delay.Due to the introduced additional or increased thermal energy, heating can be dispensed with by the same amount of energy after recuperation. The originally unused braking energy thereby becomes the usable heat. Due to the increased thermal energy, the direct removal of electrical energy from the electrical energy store can be reduced. By reducing the direct removal from the electrical energy store, an energy throughput of the electrical energy store is reduced. The service life of the electrical energy store can be increased by the reduced energy throughput.The recuperation power can also be increased by the system according to the invention. Furthermore, overall efficiency can be increased by the system according to the invention.In particular, the driving efficiency can be increased in dynamic driving and an air conditioning requirement. Furthermore, the system according to the invention can reduce the energy consumption of the motor vehicle. Furthermore, the system according to the invention can reduce brake wear and the generation of fine dust.There are embodiments in which the power requirement is reduced when predicting the delay.The power demand may be reduced once the delay has been predicted. The power requirement may be reduced prior to the delay.The prediction or prediction can be made, among other things, from data for navigation, for topography, for the brake / drive pedal, for the environmental condition, for the driver type or for eco settings. The prediction may also involve other vehicle data. The prediction can also be effected by including data which are obtained wirelessly via an external data memory.The power requirement can be reduced before the delay, since it is known by the prediction that sufficient thermal energy is made available promptly from the recuperation of the motor vehicle. For this reason, the power requirement of the conversion arrangement can be reduced and the temperature of the temperature control medium in the temperature control circuit can be reduced. As a result, the energy throughput, which is taken from the electrical energy store for controlling the temperature, simultaneously decreases.There are embodiments where the power demand is increased upon a request for delay.The power demand may be increased upon a deceleration request. The request for the deceleration may be a driver request. The request for the deceleration can be made via a pedal position.The power demand may be increased during the delay. During the delay, sufficient recovered electrical energy is available. Since sufficient electrical energy is available, the power requirement for conversion into thermal energy can be increased. By introducing the thermal energy into the temperature control circuit, the temperature of the temperature control medium is increased. At the same time, the consumption of electrical energy from the electrical energy store is reduced. As a result, the energy throughput, which is taken from the electrical energy store for controlling the temperature, decreases.In another embodiment, basically or preventively a heating can be activated during recuperation of the electric machine. This can be done within the scope of a control loop. Subsequently, within the scope of the regulation, the temperature deviation thereby arising in the temperature control circuit can be compensated for subsequently.There are embodiments where the power demand is reduced after the delay until the stored thermal energy from the portion of the recovered electrical energy is consumed.The thermal energy introduced previously is temporarily stored in the temperature control circuit. The thermal energy or a portion of the thermal energy can still be temporarily stored in the temperature control circuit even after the delay. As long as temporarily stored thermal energy is present in the temperature control circuit, the power requirement can remain reduced. As a result, the temperature of the temperature control medium in the temperature control circuit decreases successively. Due to the reduced power requirement, the energy throughput also decreases.For example, the temperature can successively decrease up to a predetermined limit value. Once this limit value has been reached, the power demand can be normalized or increased again.There are embodiments in which the temperature in the temperature control medium is changed depending on the power requirement of the conversion arrangement.The conversion arrangement converts a different amount of thermal energy depending on the power requirement. Depending on how much thermal energy is available, the temperature in the temperature control medium can be changed.In an example in which a large amount of thermal energy is available due to the manner of the delay, the temperature of the temperature control medium is increased more strongly by the thermal energy. In order to increase this energy input, it is then possible, for example, to dispense with heating via the electrical energy store.There are embodiments in which the control of the temperature of the temperature control medium in the temperature control circuit and a control of drive components of the motor vehicle are coupled via a temperature model.By controlling the temperature of the temperature control medium in the temperature control circuit, a setpoint output of an air conditioning compressor can be output. By controlling the temperature of the temperature control medium in the temperature control circuit, a setpoint output of a heater can be output. By controlling the temperature of the temperature control medium in the temperature control circuit, a setpoint output of the air conditioning compressor and of the heater can be output.By controlling the drive components, a desired torque of a mechanical brake can be output. A setpoint torque of the electric machine can be output via the control of the drive components. Via the control of the drive components, the setpoint torque of the mechanical brake and the setpoint torque of the electric machine can be output.The temperature model can intelligently couple the control of the temperature of the tempering medium in the tempering circuit and the control of the drive components. The coupling via the temperature model can be effected in such a way that the output variables of the control of the aforementioned setpoint torques are matched to one another via the temperature model. In other words, the temperature of the temperature control medium can be controlled dynamically as a function of the driving situation.The recuperation capability can be increased by coupling to the temperature model. As a result, a load on the drive components can be reduced.By coupling to the temperature model, the use of the recuperation energy present can be better distributed in the motor vehicle with the aspect of reducing the load on the drive components. Thereby, the driving efficiency of the motor vehicle can be increased.There are embodiments in which an air conditioning request enters the control of the temperature as well as the temperature model as input quantity, and a request for deceleration enters the control of the drive components as input quantity as well as the temperature model, and an output quantity of the temperature model enters the control of the temperature and the control of the drive components as input quantity, respectively.Furthermore, an environmental parameter can be included as an input variable in the temperature model. Furthermore, the prediction can be incorporated as an input variable into the temperature model.Furthermore, one or more limiting parameters or factors can be included as input variable in the control of the drive components. The limitation may be a minimum limitation. The limitation may be a maximum limitation. The limitation may result from a continuous power of the electric machine. The limitation may result from power electronics. The limitation can result from a maximum charging current of the electrical energy store. The limitation may result from other limiting factors.There are embodiments in which the portion of the recovered electrical energy is taken from the electric machine in a variable manner with respect to a state of charge of the electrical energy store directly.The portion of the recovered electrical energy can be taken directly from the electric machine independently of the state of charge of the electrical energy store. The portion of the recuperated electrical energy can be taken directly from the electric machine, while the electrical energy store is charged simultaneously with the remaining portion of the recuperated electrical energy. The portion of the recovered electrical energy can be taken directly from the electric machine before the electrical energy store is charged. The portion of the recovered electrical energy can be taken directly from the electric machine before the electrical energy store is fully charged.Because the portion of the recovered electrical energy is branched off directly from the electric machine and made available for controlling the temperature of the temperature control medium, the energy throughput at the electrical energy store can be reduced by the same amount of energy subsequently. As a result, the electrical energy store is loaded to a lesser extent. The service life of the electrical energy store can thereby be increased.There are embodiments in which the portion of the recovered electrical energy is additionally used for a load arrangement of the motor vehicle.The load arrangement may comprise one or more loads. A load can be, for example, a further electrical energy store. The further electrical energy store can be a 12V battery. The further load can be an additional structure on a motor vehicle. The structure may be, for example, a recreational vehicle structure, a crane structure or another structure.A second aspect of the invention relates to a method for controlling a temperature of a temperature control medium in a temperature control circuit in a motor vehicle having the system according to the invention, comprising:directly drawing a portion of a recuperated electrical energy from an electrical machine during deceleration;converting the portion of the recovered electric energy into a thermal energy with a conversion arrangement;introducing the thermal energy into the temperature control circuit;controlling a power requirement of the conversion arrangement depending on a manner of the delay.The method is not limited to the aforementioned order of steps. The steps can also proceed next to one another or in a different sequence. The method can be supplemented by further steps.The portion of the recovered electric power may be a preset percentage value of the total recovered electric power. The share value may be variably set. The part can be variably set depending on the current driving situation or deceleration. The portion of the recovered electrical energy is removed when the electric machine is in generator operation.The introduced thermal energy can be temporarily stored in the temperature control circuit.The power requirement of the conversion arrangement can be increased. The power requirement of the conversion arrangement can be reduced. Depending on the power requirement, the thermal energy available can vary.A third aspect of the invention relates to a computer program which can be loaded directly into a memory of a control device, having program means for executing the steps of the method according to the invention when the program is executed in the control device.A fourth aspect of the invention relates to a control device which is configured to carry out the method according to the invention.A fifth aspect of the invention relates to a motor vehicle having the system according to the invention, wherein the motor vehicle is configured and designed to carry out the method according to the invention.The motor vehicle may be an electric vehicle. The motor vehicle may be a hybrid vehicle. The motor vehicle may be a truck. The motor vehicle may be a motorcycle. The motor vehicle can be a watercraft.The system according to the invention can also be used in any other installation which is driven via an electric machine and has variable operating states. The system according to the invention can be used, for example, for a railborne vehicle.Embodiments of the invention will now be described by way of example and with reference to the accompanying drawings. Identical or similar parts are denoted by uniform reference numerals. The following shows: FIG. 1 schematically shows an electric machine during deceleration; FIG. 2 schematically shows a representation of a system according to the invention; FIG. 3 schematically shows a time sequence of a control of a temperature of a temperature control medium; FIG. 4 schematically shows a control diagram with a coupled temperature model; FIG. 5 schematically shows a flow diagram of a method according to the invention; and FIG. 6 schematically shows a motor vehicle according to the invention having a control device according to the invention according to one specific embodiment.FIG. 1 shows an electric machine 10 during deceleration. The deceleration is achieved jointly by mechanical braking and by recuperation. The arrows going upward away from the electric machine 10 and from the mechanical brakes represent an energy loss. During the deceleration, the electric machine 10 recuperates electrical energy R. The recuperated electrical energy R is used to charge an electrical energy store 20. Furthermore, a portion of the recovered electrical energy R is taken directly from the electric machine 10 for a conversion arrangement 30 and a temperature control circuit 40. Optionally, the recovered electrical energy R for further consumers 50 is taken directly from the electric machine 10.FIG. 2 shows a schematic illustration of a system 1 according to the invention. the system 1 comprises the electric machine 10, the electrical energy store 20, the conversion arrangement 30, a temperature control circuit 40 and an optional consumer arrangement 50. The dashed arrows show an optional energy transfer.FIG. 2 shows a state in which the electric machine 10 generates the recuperated electrical energy R by recuperation. The recovered electrical energy R is introduced directly from the electric machine 10 into the electrical energy store 20. A portion of the recovered electrical energy R is taken directly from or branched off from the electric machine 10. The extracted portion of the recovered electric energy R is introduced into the conversion assembly 30. The conversion arrangement 30 converts the portion of the recovered electrical energy R into a thermal energy T. The thermal energy T is then introduced or temporarily stored in the temperature control circuit 40. Optionally, an electrical energy is additionally introduced from the electrical energy store 20 into the conversion arrangement 30.Furthermore, optionally, the removed part of the recovered electrical energy R is additionally used for the load arrangement 50. The electrical energy from the electrical energy store 20 is optionally also introduced into the load arrangement 50.FIG. 3 shows, by way of example, a schematic illustration 80 of a control of a temperature of a temperature control medium in different driving situations along a time profile using the system 1 according to the invention. Motor vehicle 100 is located in different driving situations S 1 to S 5 along the time profile, the type of deceleration being different. Four different diagrams 81, 83, 85, 87 along a time t are shown below. The diagrams 83, 85, 87 show a profile comparing for the motor vehicle 100 with the system 1 (solid bold line) and for a motor vehicle known from the prior art (dashed line).Plot 81 shows a propulsion power demand of the motor vehicle 100 over time.The graph 83 shows an air conditioning performance along the passage of time. The air conditioning power corresponds in the present case to the power requirement of the conversion arrangement 30.Plot 85 shows battery power over time. The battery power corresponds to a battery power throughput. The battery power corresponds to a power throughput of the electrical energy storage 20.Plot 87 shows coolant temperature along time passage. The coolant temperature corresponds to the temperature of the temperature control medium in the temperature control circuit.The control of the temperature control medium is briefly explained below on the basis of the different driving situations S 1 to S 5 of the motor vehicle 100.At the beginning of the driving situation S 1, the motor vehicle 100 is driving at a constant speed on a flat road. The drive power demand and the battery power are constant.Between driving situation S 1 and driving situation S 2, an imminent deceleration is predicted. The imminent deceleration results from a downhill travel or downhill travel. Due to the imminent deceleration or an imminent recuperation, the system 1 reduces the power requirement of the conversion arrangement 30. in other words, the air conditioning power is reduced. As a result, the battery energy throughput is already reduced before the imminent delay. The temperature of the temperature control medium is reduced between the driving situation S 1 and the driving situation S 2.Between driving situation S 2 and S 3, motor vehicle 100 is travelling downhill. Initially, a delay is requested. The drive power requirement shifts to the negative range. Electrical energy is recuperated. At the same time, the air conditioning performance is increased. The power requirement of the conversion arrangement 30 is increased. A portion of the recovered electrical energy is taken directly from the electric machine 10 for the conversion arrangement 30. This reduces the battery energy throughput compared to the system known from the prior art. By increasing the air conditioning power, the temperature of the temperature control medium is increased again between the driving situation S 2 and the driving situation S 3.Between driving situation S 3 and S 4, motor vehicle 100 is again on a flat road after deceleration. The air conditioning performance is reduced. The power requirement of the conversion assembly 30 is reduced after the delay until the stored thermal energy T is consumed. Furthermore, between driving situation S 3 and S 4, an imminent deceleration is predicted due to a speed reduction ahead. The air conditioning performance is further lowered. The power requirement of the conversion arrangement 30 is further reduced. This reduces the battery power throughput. The temperature of the temperature control medium is reduced.In driving situation S 4, the deceleration of motor vehicle 100 takes place on the basis of the speed reduction. In the present example, the speed reduction takes place from 100 km / h to 50 km / h. The drive power requirement, the air-conditioning power, the battery energy throughput and the temperature of the temperature-control medium behave as in the previously described downhill travel between S 2 and S 3.The driving situation S 5 is the driving situation after the complete deceleration due to the speed reduction that has elapsed. The air conditioning performance is reduced. The power requirement of the conversion assembly 30 is reduced until the stored thermal energy is consumed. The temperature in the temperature control medium is reduced. The temperature is reduced to a limit value. The temperature is then kept constant.FIG. 4 schematically shows an embodiment of a control diagram with a coupled temperature model 60. a control 300 of the temperature of the temperature control medium and a control 400 of drive components of the motor vehicle 100 are coupled via the temperature model 60.The element 301 includes an air conditioning request. Element 301 is input to controller 300.An output of the temperature model 60 is input to the controller 300 as an input.The element 320 comprises a setpoint output of the air conditioning compressor or of a heater. Element 320 is an output of controller 300.Element 303 comprises an environmental parameter of an environmental condition. The environmental parameter enters the temperature model 60 as an input variable.Element 305 comprises the prediction. The prediction is optionally input into the temperature model 60 as an input variable.Element 401 includes a vehicle deceleration request. Element 401 enters controller 400 as an input. In detail, the element 401 enters as input variable into a control of the mechanical brake. Furthermore, element 401 is input to a control of a mechanical brake.Element 401 is also input to temperature model 60.Elements 403, 405 and 407 are minimum and maximum limits, respectively. Elements 403, 405 and 407 enter controller 400 as input variable. In detail, elements 403, 405 and 407 enter the control of electric machine 10 as an input variable.Element 403 includes a continuous power of the electric machine. Element 403 comprises a continuous power of a power electronics. Element 403 enters controller 400 as an input.The element 405 comprises a maximum charging current of the battery. Element 405 also enters controller 400 as an input variable.Element 407 includes further optional limitations. Element 407 is also input to controller 400.Element 410 includes a desired mechanical brake torque. Element 410 is an output of controller 400. In detail, element 410 is the output of the mechanical brake controller.Element 420 includes a setpoint torque of electric machine 10. element 420 is an output variable of controller 400. Element 420 is the output variable of the control of electric machine 10.An output from the temperature model 60 is input to the controller 400 as an input. The output variable from the temperature model 60 is input to the controller of the electric machine 10 as an input variable.FIG. 5 schematically shows a flow diagram 200 of a method according to the invention with the system 1 according to the invention. The different blocks 210 to 240 each comprise a method step. The sequence of the method steps is not limited to the arrangement of blocks 210 to 240.In block 210, during deceleration of the motor vehicle 100, a portion of the recovered electrical energy R is taken directly from the electric machine 10. The portion of the recovered electric energy R is provided to the conversion device 30. In parallel, another part of the recovered electrical energy R is used to charge an electrical energy store 20.In block 220, the portion of the recovered electrical energy R is converted by the conversion arrangement 30 into thermal energy T.In block 230, the thermal energy T is introduced into the temperature control circuit 40.In block 240, the power demand of the conversion arrangement 30 is controlled depending on a manner of the delay.FIG. 6 finally schematically shows an exemplary control device 160 which is configured to carry out the method described above. Control unit 160 is situated in a motor vehicle 100 and is connected to system 1. The control unit 160 can control an electric machine 10. The controller 160 includes a processor 161, a memory (electronic storage medium) 163, and an interface 165. Furthermore, the memory 163 also stores a computer program (software) 150 which is designed to carry out the method described above using program means. The processor 161 is configured to execute program instructions of the computer program 150. The interface 165 is further configured to receive and transmit data. This can be, for example, an interface to a CAN bus of the motor vehicle 100, via which the control device 160 receives signals and sends control commands.List of reference characters1 System 10 Electric machine 20 Electric energy store 30 Conversion arrangement 40 Temperature control circuit 50 Consumer arrangement 60 Temperature model 80 Time profile Temperature control of a temperature control medium 81 Drive power requirement 83 Power requirement of a conversion arrangement 85 Battery power 87 Temperature of a temperature control circuit 100 Motor vehicle 150 Computer program 160 Engine control / control device 161 Processor 163 Memory 165 Interface 200 Method 300 Control of a temperature of a temperature control medium 400 Control of drive components R Recovered electric energy t Time T Thermal energy S Driving situationReferences included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedDE 10 2020 126 659 A1

[0007] DE 10 2015 215 424 A1

[0008] WO 2008 / 147305 A1

[0009]

Claims

System (1) for controlling a temperature of a temperature control medium in a temperature control circuit (40) in a motor vehicle (100), having an electric machine (10) which recuperates electrical energy for charging an electrical energy store (20) during a deceleration, a conversion arrangement (30) which is designed to convert a part of the recuperated electrical energy (R) into thermal energy (T) which is introduced into the temperature control circuit (40), wherein the part of the recuperated electrical energy (R) is taken directly from the electric machine (10) into the conversion arrangement (30) for energy conversion and a power demand of the conversion arrangement (30) is controlled as a function of a type and manner of the deceleration.The system (1) according to claim 1, wherein the power requirement is reduced when predicting the delay.The system (1) according to claim 1 or 2, wherein the power requirement is increased upon a request for delay.The system (1) according to any of the preceding claims, wherein the power requirement is reduced after the delay until the stored thermal energy (T) is consumed from the portion of the recovered electrical energy (R).The system (1) according to any one of the preceding claims, wherein the temperature in the temperature control medium is varied depending on the power requirement of the conversion arrangement (30).The system (1) according to any one of the preceding claims, wherein a control (300) of the temperature of the temperature control medium in the temperature control circuit and a control (400) of drive components of the motor vehicle (100) are coupled via a temperature model (60).The system (1) according to claim 6, wherein an air conditioning request enters the temperature controller (300) as an input and the temperature model (60), and a deceleration request enters the driving component controller (400) as an input and the temperature model (60), and an output of the temperature model (60) enters the temperature controller (300) as an input and the driving component controller (400), respectively.The system (1) according to any one of the preceding claims, wherein the portion of the recovered electrical energy (R) is taken variably with respect to a state of charge of the electrical energy store (20) directly from the electrical machine (10).The system (1) according to any one of the preceding claims, wherein the portion of the recovered electrical energy is also used for a load arrangement (50) of the motor vehicle (100).Method for controlling a temperature of a temperature control medium in a temperature control circuit (40) in a motor vehicle (100) having a system (1) according to one of the preceding claims, comprising: - directly removing a part of a recuperated electrical energy (R) from an electrical machine (10) during a deceleration; - converting the part of the recuperated electrical energy (R) into a thermal energy (T) with a conversion arrangement (30); - introducing the thermal energy (T) into the temperature control circuit (40); - controlling a power requirement of the conversion arrangement (30) depending on a type of the deceleration.Computer program (150) which can be loaded directly into a memory (163) of a control device (160), having program means for carrying out the steps of the method according to Claim 10 when the program (150) is executed in the control device (160).Control device (160) configured to execute a method according to claim 10.Motor vehicle (100) having a system (1) according to one of Claims 1 to 9, wherein the motor vehicle (100) is configured and designed to carry out a method according to Claim 10.

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