Method for controlling the temperature of elements of a motor vehicle, in particular of an electric vehicle, and motor vehicle

Abstract

The invention relates to a method for controlling the temperature of elements of a motor vehicle (1), in which a first of the elements comprises a stator (7) and / or a rotor (11) of an electric motor (8), by means of which stator and / or rotor the motor vehicle (1) is electrically drivable. A second of the elements comprises a component (9) of a set of power electronics (10) via which the electric motor (8) can be supplied with electrical energy. The motor vehicle (1) has a temperature control circuit (13) through which a temperature control means flows. The motor vehicle (1) has a temperature control device (14) by means of which the temperature control means is controlled in terms of temperature and is conveyed through the temperature control circuit (13). The elements are arranged in the temperature control circuit (13) and the temperature of said elements is controlled by means of the temperature control means flowing through the temperature control circuit (13). The motor vehicle (1) has an electronic computing device (4) which has a request module (16) and a temperature control module (17). The request module (16) makes individual temperature control requests (A1, A2) available.

Description

[0001] Method for tempering elements of a motor vehicle, in particular an electric vehicle, and motor vehicle

[0002] The invention relates to a method for controlling the temperature of elements of a motor vehicle, in particular an electric vehicle. Furthermore, the invention relates to a motor vehicle, in particular an electric vehicle. US 2021 / 0094390 A1 discloses a cooling system of a vehicle. CN 115056628 A discloses a thermal management system of a hybrid vehicle. Furthermore, KR 20120116285 A discloses a cooling fluid circulation unit for circulating a cooling fluid through an electric machine and / or an inverter.

[0003] The object of the present invention is to provide a method and a motor vehicle so that elements of the motor vehicle can be tempered, i.e. cooled and / or heated, in a particularly advantageous manner.

[0004] This object is achieved according to the invention by a method having the features of patent claim 1 and by a motor vehicle having the features of patent claim 9. Advantageous embodiments of the invention are the subject of the dependent claims.

[0005] A first aspect of the invention relates to a method for temperature control of elements, in particular components, of a motor vehicle, also simply referred to as a vehicle. This means that the motor vehicle, preferably designed as a motor vehicle, in particular as a passenger car, has the elements in its fully manufactured state. The motor vehicle is, for example, a hybrid vehicle or an electric vehicle, in particular a battery-electric vehicle (BEV). In the method, a first of the elements comprises a stator of an electric machine and / or a rotor of the electric machine of the motor vehicle, which can be driven by means of the electric machine, in particular purely electrically.This means that the electric machine, in its fully manufactured state, has the stator and the rotor, which can be driven by means of the stator and is thus rotatable about a machine axis of rotation relative to the stator. For example, the electric machine can provide drive torques for driving the motor vehicle, in particular purely electrically, via its rotor. Very preferably, the electric machine is a high-voltage component whose electrical voltage, in particular electrical operating or nominal voltage, is preferably greater than 50 volts, in particular greater than 60 volts, and very preferably amounts to several hundred volts. A second of the elements comprises a component of power electronics in the motor vehicle, wherein the electric machine can be or is supplied with electrical energy via the power electronics. For example, the second component is an inverter, which is also referred to as an inverter.For example, in its fully manufactured state, the motor vehicle has an electrical energy storage device, which is also referred to as a battery and is preferably designed as a secondary battery. Very preferably, the electrical energy storage device is a high-voltage component whose electrical voltage, in particular electrical operating or nominal voltage, is preferably greater than 50 volts, in particular greater than 60 volts, and very preferably amounts to several hundred volts. In this case, for example, the aforementioned electrical energy, by means of which the electrical machine can be supplied via the power electronics, is to be stored or is stored, in particular electrochemically, in the electrical energy storage device. In the method, the motor vehicle also has a temperature control circuit through which a preferably liquid temperature control medium flows. Thus, the temperature control medium is preferably a liquid.The temperature control medium is very preferably electrically non-conductive. For example, the temperature control medium is or comprises, in particular exclusively or at least, an oil. In the method, the motor vehicle also has a temperature control device, provided in particular in addition to the elements, by means of which the temperature control medium is temperature-controlled, i.e., cooled and / or heated. In addition, the temperature control device conveys the temperature control medium through the temperature control circuit. In the method, the elements are arranged in the temperature control circuit and can thus be flowed through by the temperature control medium. In particular, it is provided that the temperature control medium flows through the elements in the method. In the method, the elements are temperature-controlled, i.e., heated and / or cooled, by means of the temperature control medium flowing through the temperature control circuit.The respective element can, for example, be heated by means of the temperature control medium in such a way that heat is transferred from the temperature control medium to the respective element. For example, the respective element can be cooled by means of the temperature control medium in such a way that heat is transferred from the respective element to or onto the temperature control medium. In order to temperature control the temperature control medium, the temperature control device has, for example, at least one heat exchanger through which the temperature control medium can flow or through which it flows. Furthermore, a fluid provided in addition to the temperature control medium and which, for example, is different from the temperature control medium can flow around and / or through or can flow around and / or through the heat exchanger, so that heat exchange between the temperature control medium and the fluid can be or takes place via the heat exchanger.If, for example, heat is transferred from the temperature control medium to or onto the fluid via the heat exchanger, the temperature control medium is cooled as a result. If, for example, heat is transferred from the fluid to or onto the temperature control medium via the heat exchanger, the temperature control medium is heated as a result, for example. Furthermore, it is conceivable for the temperature control device to have a fan, by means of which air, in particular from an environment of the motor vehicle, can be conveyed. For this purpose, the fan, for example, has a fan wheel which is rotatable or is rotated about a fan wheel axis of rotation, in particular relative to the elements, in order to convey the air. By means of the air conveyed by the fan, the temperature control medium can, for example, be at least indirectly tempered, in particular cooled. For example, the fan has an electric motor, by means of which the fan wheel can be driven and can therefore rotate about the fan wheel axis of rotation.Thus, the fan is preferably designed as an electric fan, i.e. as an electrically operated fan.

[0006] In the method, the motor vehicle has an electronic computing device by means of which the method, for example, is carried out. The electronic computing device has a request module and a temperature control module. This is to be understood in particular as the following: For example, the request module and the temperature control module are program components, also referred to as software components, of a program, also referred to as software, which is executed, for example, by means of the electronic computing device or on the electronic computing device. Furthermore, it is conceivable that the request module and the temperature control module are individual, separate electronic computing units which are components of the electronic computing device or form the electronic computing device.

[0007] In the method, the request module provides individual temperature control requests, namely a first temperature control request of the first element and a second temperature control request of the second element. The respective temperature control request of the respective element is or characterizes a need for temperature control of the respective element. In other words, the respective temperature control request of the respective element is or characterizes, for example, whether and / or to what extent the respective element is to be temperature controlled. Thus, for example, the first temperature control request comprises, characterizes, or is at least one first value, and for example, the second temperature control request is, comprises, or characterizes at least one second value. The respective value indicates, for example, whether and to what extent the respective element is to be temperature controlled, i.e., cooled and / or heated.

[0008] In the method, the temperature control module receives the individual temperature control requests provided by the request module. Furthermore, the method according to the invention provides that the temperature control device is operated by means of the temperature control module in accordance with the received temperature control requests, whereby the temperature control medium and thus the elements are temperature-controlled in accordance with the received temperature control requests.

[0009] The invention is based in particular on the following findings and considerations: Typically, a first control unit provides an overall temperature control requirement which indicates whether and to what extent the or all of the elements are to be temperature controlled. A temperature control unit receives the overall temperature control requirement and subsequently operates the temperature control device depending on this in order to thereby serve, i.e. satisfy, the overall temperature control requirement. However, it has been found that such conventional temperature control may not do justice to the different thermal inertias of the elements. In other words, the elements have different thermal inertias, in particular such that the first element has a high first thermal inertia and the second element a second thermal inertia which is significantly lower than the first thermal inertia.Against this background, conventional solutions can result in undesirable, excessively low, or excessively high temperatures of the elements being avoided, but in one of the elements being tempered more strongly, i.e., cooled or heated more than necessary or desired. In contrast, the method according to the invention now makes it possible to take individual temperature control requirements into account and thus temperature control the elements individually and as needed.

[0010] In one embodiment of the invention, the temperature control device controls the temperature of the temperature control medium, thereby creating a flow temperature for the temperature control medium flowing through the temperature control circuit, which flow flows into the respective element at the flow temperature. Since heat is exchanged between the respective element and the temperature control medium while the temperature control medium flows through the respective element, the temperature control medium, for example, has a return temperature that is different from the flow temperature, and by means of which the temperature control medium flows out of the respective element. If the respective element is cooled by means of the temperature control medium, the return temperature is, for example, higher than the flow temperature. If, for example, the respective element is heated by means of the temperature control medium, the return temperature is, for example, lower than the flow temperature.

[0011] Furthermore, it is preferably provided that, by means of the temperature control device, a volume flow of the temperature control medium is effected, which flows through the temperature control circuit with the volume flow. For example, the temperature control device comprises at least or precisely one pump, in particular an electrically operated pump, by means of which the temperature control medium is conveyed through the temperature control circuit. The flow temperature and the volume flow are two, in particular different, means or mechanisms that can be used to temperature control the elements. This means in particular that, for example, by varying the volume flow, the temperature control of the elements effected or effectable by means of the temperature control medium can be varied.The temperature control of the elements, which can be effected or is effected by means of the temperature control medium, can also be varied by varying the flow temperature. As a result, it is particularly possible, for example, to vary the temperature control of the elements by varying the volume flow while not varying the flow temperature, i.e. while the flow temperature remains unchanged or at least essentially the same or constant. Furthermore, it is conceivable to vary the temperature control of the elements by varying the flow temperature while not varying the volume flow, i.e. while the volume flow remains unchanged and thus essentially the same or constant. In both cases, heat removal from the elements or heat supply to the elements can be varied.

[0012] It has proven particularly advantageous if, following a first change in the temperature control requirements by means of the temperature control module, the temperature control device is operated in such a way that the flow temperature of the temperature control medium is changed, while the volume flow of the temperature control medium flowing through the temperature control circuit, caused by the temperature control device, remains unchanged. Furthermore, it has proven particularly advantageous if, following a second change in the temperature control requirements by means of the temperature control module, which change is particularly different from the first change, the temperature control device is operated in such a way that the volume flow of the temperature control medium flowing through the temperature control circuit, caused by the temperature control device, is changed, while the flow temperature of the temperature control medium remains unchanged.This makes it possible to take into account, in particular, the previously mentioned different thermal inertias of the elements, so that the elements can be tempered as required, in particular depending on the respective tempering requirements.

[0013] A further embodiment is characterized in that, as a result of the first change by means of the temperature control module, the temperature control device is operated in such a way that the flow temperature of the temperature control medium is reduced, while the volume flow of the temperature control medium flowing through the temperature control circuit, caused by the temperature control device, remains unchanged. It has also proven advantageous if, as a result of the second change by means of the temperature control module, the temperature control device is operated in such a way that the volume flow of the temperature control medium flowing through the temperature control circuit, caused by the temperature control device, is increased, while the flow temperature of the temperature control medium remains unchanged. Reducing the flow temperature and increasing the volume flow initially have the same effect, namely that heat dissipation from the elements is increased, and thus the elements are cooled more effectively.However, due in particular to the different thermal inertias or thermal masses of the elements, the reduction in the flow temperature and the increase in the flow rate, or their effects on the temperature control of the elements, differ from one another in the following ways: The change or reduction in the flow temperature is relatively slow, so the change or reduction in the flow temperature takes quite a long time, i.e., longer than the change or increase in the flow rate. Thus, it takes longer for the change or reduction in the flow temperature to affect the temperature control of the elements, or for the actual temperature control of the elements, than the change or increase in the flow rate.Since conventional solutions do not differentiate between the individual temperature control requirements or do not consider the individual temperature control requirements, but only consider the overall temperature control requirement, in conventional solutions, for example, when the overall temperature control requirement increases, both the volume flow is changed, in particular increased, and the flow temperature is reduced, in particular. This allows the second element, which has low thermal inertia or low thermal mass, to be quickly tempered in order to avoid excessively high temperatures or excessively low temperatures of the second element. However, this then results, for example, in undesirably strong tempering, in particular cooling, of the first element.Excessive cooling of the first element, for example, can be undesirable because it can then lead to undesirably high internal losses, such as excessive internal friction in the first element. The problems and disadvantages mentioned above can now be avoided. If, for example, the second temperature control requirement changes, the second element can be temperature-controlled quickly and as required, for example by changing the volume flow, without undesirably affecting the first element or its temperature control. If, for example, the first temperature control requirement changes, the first element can be temperature-controlled specifically and as required, for example by changing the flow temperature, without undesirably affecting the second element or its temperature control.

[0014] In order to be able to achieve a particularly needs-based temperature control of the elements and consequently a particularly efficient operation of the motor vehicle, it is provided in a further embodiment of the invention that if the first temperature control requirement changes in a first way, while the second temperature control requirement remains unchanged or changes in a second way, the temperature control device is operated by means of the temperature control module in such a way that the flow temperature of the temperature control medium is changed, while the volume flow of the temperature control medium flowing through the temperature control circuit, which flow is effected by means of the temperature control device, remains unchanged.For example, if the second temperature control requirement changes in a third way that differs from the second way, while the first temperature control requirement remains unchanged, or changes in a fourth way that differs from the first way, the temperature control module operates the temperature control device in such a way that the volume flow of the temperature control medium flowing through the temperature control circuit, achieved by the temperature control device, changes while the flow temperature of the temperature control medium remains unchanged. This allows, in particular, the different masses or inertias of the elements to be taken into account, allowing the elements to be temperature-controlled in a targeted, needs-based, individualized, and intelligent manner.

[0015] In particular, the invention is based on a particularly conceptual clustering of the elements. The clustering is carried out in particular on the basis of the different thermal inertias or masses of the elements. The clustering provides, for example, for the first element to be assigned to a first cluster and the second element to a second cluster. Elements of the first cluster have a first thermal inertia and / or thermal mass, and elements of the second cluster have a second thermal mass and / or a second thermal inertia which is lower than the first thermal mass or first thermal inertia. Varying the temperature control of the elements of the first cluster is advantageously carried out by varying the flow temperature, and varying the temperature control of the elements of the second cluster is advantageously carried out by varying the volume flow.This ensures that the cluster elements can be tempered in a needs-based, individualized and intelligent manner.

[0016] In a further, particularly advantageous embodiment of the invention, it is provided that the first mode is that the first temperature control requirement increases. Preferably, the third mode is that the second temperature control requirement increases. Thus, if the first temperature control requirement changes in the first mode while the second temperature control requirement remains unchanged or changes in the second mode, the temperature control device is operated by means of the temperature control module in such a way that the flow temperature of the temperature control medium is reduced, while the volume flow of the temperature control medium flowing through the temperature control circuit, effected by means of the temperature control device, remains unchanged.Thus, if the second temperature control requirement changes in the third way while the first temperature control requirement remains unchanged or changes in the fourth way, the temperature control device is operated by means of the temperature control module in such a way that the volume flow of the temperature control medium flowing through the temperature control circuit caused by the temperature control device is increased, while the flow temperature of the temperature control medium remains unchanged.

[0017] If, for example, the motor vehicle is accelerated sharply, particularly as a result of a driver actuating an operating element such as an accelerator pedal using the electric motor, the second temperature control requirement increases as a result. In order to then cool the second element quickly, effectively and efficiently, but to avoid excessive, undesired cooling of the first element, the volume flow is increased while the flow temperature remains unchanged. After acceleration, the volume flow can be reduced again, for example. This prevents excessive cooling of the first element, although the second element is or could be advantageously cooled. In addition, this can prevent unnecessary activation of the fan, for example, so that particularly energy-efficient operation of the motor vehicle can be achieved.An increase in the first temperature control requirement can be responded to, for example, by reducing the flow temperature, in particular while avoiding an increase in the volume flow, whereby advantageous cooling of the first element can be achieved.

[0018] In particular, the respective temperature control requirement is, for example, a respective cooling requirement which indicates, i.e. characterizes, a respective need for a respective cooling of the respective element.

[0019] In order to be able to realize particularly advantageous temperature control, a further embodiment of the invention provides that the first element comprises the stator. A third of the elements comprises the rotor. The third element is also arranged in the temperature control circuit, wherein the third element is also temperature-controlled by means of the temperature control medium flowing through the temperature control circuit. A third of the individual temperature control requests provided by the request module is a third temperature control request from the third element. The temperature control module receives the individual temperature control requests provided by the request module. The temperature control device is operated by means of the temperature control module in accordance with the received temperature control requests, whereby the temperature control medium and thus the elements are temperature-controlled in accordance with the received temperature control requests.This allows the elements to be tempered according to requirements.

[0020] Finally, it has proven particularly advantageous if another of the individual temperature control requests provided by the request module is a further temperature control request of the temperature control medium. This allows the temperature control medium itself, i.e., its temperature control request, to be taken into account. The temperature control module receives the individual temperature control requests provided by the request module, and the temperature control device is operated by means of the temperature control module depending on the received temperature control requests, whereby the temperature control medium and thus the elements are temperature-controlled depending on the received temperature control requests. This allows for particularly advantageous and needs-based temperature control.

[0021] A second aspect of the invention relates to a motor vehicle, also referred to simply as a vehicle, and preferably designed as a motor vehicle, in particular as a passenger car, which is designed to carry out a method according to the first aspect of the invention. Advantages and advantageous embodiments of the first aspect of the invention are to be regarded as advantages and advantageous embodiments of the second aspect of the invention, and vice versa.

[0022] Further details of the invention will become apparent from the following description of a preferred embodiment with the accompanying drawings. In the drawings:

[0023] Fig. 1 is a schematic representation of a motor vehicle; and

[0024] Fig. 2 is a block diagram illustrating a method for

[0025] Tempering of vehicle elements.

[0026] In the figures, identical or functionally identical elements are provided with the same reference symbols.

[0027] Fig. 1 shows a schematic representation of a motor vehicle 1, also simply referred to as a vehicle, which is preferably designed as a motor vehicle, in particular as a passenger car. The motor vehicle 1 has at least or exactly two vehicle axles arranged one after the other in the longitudinal direction of the motor vehicle, namely a first vehicle axle 2 and a second vehicle axle 3. The respective vehicle axle 2, 3 has at least or exactly two vehicle wheels 5, 6. The respective vehicle wheels 5, 6 of the respective vehicle axle 2, 3 are arranged on sides of the motor vehicle 1 that are opposite one another in the transverse direction of the motor vehicle 1. The vehicle wheels 5 and 6 are ground contact elements by means of which the motor vehicle 1 can be or is supported downwards on a ground in the vertical direction of the motor vehicle 1.If the motor vehicle 1 is driven along the ground while the motor vehicle 1 is supported downwards on the ground via the ground contact elements in the vertical direction of the motor vehicle 1, the ground contact elements roll, in particular directly, on the ground.

[0028] The motor vehicle 1 has several elements. A first of the elements comprises a stator 7 of an electric machine 8 of the motor vehicle 1. A second of the elements comprises an inverter 9 of a power electronics system 10 of the motor vehicle 1. Furthermore, a third of the elements can, for example, comprise a rotor 11 of the electric machine 8. In the present case, the first element comprises the stator and the rotor 11. The electric machine 8 can drive the vehicle wheels 6, in particular purely electrically, via its rotor 11, as a result of which the motor vehicle 1 can be driven, in particular purely electrically. Thus, the electric machine 8 can drive the motor vehicle 1, in particular purely electrically, via its rotor 11. The electric machine 8 can be supplied with electrical energy via the power electronics system 10, which energy is to be stored or is stored, in particular electrochemically, in an electrical energy storage device 12 of the motor vehicle 1.It can be seen that the inverter 9 is a component of the power electronics 10. Also shown schematically in Fig. 1 is an electronic computing device 4, which is very preferably a component of the motor vehicle 1. A method for controlling the temperature of the elements is carried out by means of the electronic computing device 4.

[0029] The motor vehicle 1 has a temperature control circuit 13 through which a preferably liquid temperature control medium can flow. For example, in the method, the temperature control circuit 13 is flowed through by the temperature control medium. The temperature control medium is very preferably an oil. The motor vehicle 1 also has a particularly schematically illustrated temperature control device 14, by means of which the temperature control medium is temperature-controlled, i.e., cooled and / or heated, in the method. Furthermore, in the method, the temperature control medium is conveyed through the temperature control circuit 13 by means of the temperature control device 14.

[0030] It can be seen from Fig. 1 that the elements, namely the stator 7, the rotor 11 and the inverter 9, are arranged in the temperature control circuit 13 and are thus to be temperature-controlled, i.e. cooled and / or heated, by means of the temperature control medium flowing through the temperature control circuit 13. Thus, it is provided that in the method the elements are temperature-controlled, i.e. cooled and / or heated, by means of the temperature control medium flowing through the temperature control circuit 13. In the following, the method and the motor vehicle 1 are described in particular with reference to cooling of the elements that can be effected or is effected by means of the temperature control medium. The rotor 11 can be driven by means of the stator 7 and can therefore be rotated about a machine axis of rotation 15 relative to the stator 7.

[0031] The electronic computing device 4 comprises a request module 16 and a temperature control module 17, which are explained in more detail below.

[0032] Fig. 2 shows a block diagram which is used below to illustrate the simplified method for tempering, i.e. in this case for cooling the elements.

[0033] As can be seen from Fig. 2, the request module 16 receives a first temperature T1 of the stator 7, a second temperature T2 of the rotor 11, a third temperature T3 of the inverter 9, a fourth temperature T4 of the inverter 9, a fifth temperature T5 of the temperature control medium and a sixth temperature T6. The sixth temperature T6 is, for example, a temperature of the temperature control medium. For example, the temperature control medium has the temperature T5 at a first location and the temperature T6 at a second location spaced from the first location. For example, the temperatures T1, T2, T3, T4, T5 and T6 are measured by means of a respective temperature sensor. In particular, depending on the first temperature T1 and the second temperature T2, the request module 16 provides a first temperature control request A1, which in the exemplary embodiment shown in the figures is a first cooling request.The first temperature control requirement A1 is or characterizes a strength of a temperature control, in particular cooling, of the first element, thus of the stator 7 and the rotor 11, to be effected by means of the temperature control medium.

[0034] In particular, depending on the temperatures T3, T4, and T5, the request module 16 provides a second temperature control request A2, which in the exemplary embodiment shown in the figures is a second cooling request. The second temperature control request A2 characterizes or is a strength of a temperature control, in particular cooling, of the second element, and thus in this case of the inverter 9, to be effected by means of the temperature control means. Furthermore, the second temperature control request A2 is or characterizes, for example, a temperature control, in particular cooling, of the temperature control means to be effected by means of the temperature control device 14, in particular at the aforementioned first location.

[0035] In particular, depending on the temperature T6, the request module 16 provides a third temperature control request A3, which in the exemplary embodiment shown in the figures is a third cooling request. The third temperature control request A3 is or comprises a strength of a temperature control, in particular cooling, of the temperature control medium, in particular of a previously mentioned second location, to be effected by means of the temperature control device 14. It can be seen that the temperature control requests A1, A2 and A3 provided by the request module 16 are individual temperature control requests that are provided by the request module 16. The temperature control module 17 receives the individual, provided temperature control requests A1, A2 and A3, wherein in the method by means of the temperature control module 17, the temperature control device 14 is operated depending on the individual received temperature control requests A1, A2 and A3.As a result, the temperature control medium and thus the elements are temperature-controlled, or in this case cooled, depending on the received temperature control requests A1, A2, and A3. This operation of the temperature control device 14 by means of the temperature control module 17 is illustrated by an arrow 18.

[0036] In the method, by means of the temperature control device 14, the temperature control medium is tempered, thereby creating a flow temperature of the temperature control medium flowing through the temperature control circuit 13, which flows at the flow temperature into the respective element, i.e. into the stator 7, the rotor 11 and the inverter 9. In addition, in the method, by means of the temperature control device 14, by means of the temperature control device 14, the temperature control medium is conveyed through the temperature control circuit 13, thereby creating a volume flow of the temperature control medium, which flows through the temperature control circuit 13 at the volume flow, and is thus conveyed through.

[0037] If the first cooling requirement changes in a first way and in such a way that the first cooling requirement increases, while the second cooling requirement and the third cooling requirement remain unchanged or change in a second way, the temperature control device 14 is operated by means of the temperature control module 17 in such a way that the flow temperature of the temperature control medium is reduced, while the volume flow of the temperature control medium flowing through the temperature control circuit 13, effected by the temperature control device 14, remains unchanged. As a result, the stator 7 and the rotor 11, and thus the electric machine 8, can be effectively, efficiently, and sustainably temperature-controlled, in this case cooled, whereby an excessively rapid change in the temperature control, in particular the cooling, of the inverter 9 can be avoided.

[0038] If the second cooling requirement changes in a third way that is different from the second way, such that the second cooling requirement increases while the first cooling requirement and the third cooling requirement remain unchanged or change in a third way that is different from the first way or the second way, the temperature control module 17 operates the temperature control device 14 in such a way that the volume flow of the temperature control medium flowing through the temperature control circuit 13, achieved by the temperature control device 14, is increased, while the flow temperature of the temperature control medium remains unchanged. As a result, the cooling of the inverter 9 can be rapidly amplified, i.e., increased, while excessively strong and / or prolonged cooling of the electric machine 8 can be avoided. This ensures particularly efficient operation of the motor vehicle 1.

[0039] List of reference symbols

[0040] 1 motor vehicle

[0041] 2 vehicle axles

[0042] 3 vehicle axles

[0043] 4 electronic computing device

[0044] 5 vehicle wheel

[0045] 6 vehicle wheel

[0046] 7 Stator

[0047] 8 electric machine

[0048] 9 inverters

[0049] 10 Power electronics

[0050] 11 Rotor

[0051] 12 electrical energy storage

[0052] 13 Temperature control circuit

[0053] 14 Tempering device

[0054] 15 Machine rotation axis

[0055] 16 Requirements module

[0056] 17 Temperature control module

[0057] 18 Arrow

[0058] A1 first tempering requirement

[0059] A2 second tempering requirement

[0060] A3 third tempering requirement

[0061] T1 temperature

[0062] T2 Temperature

[0063] T3 Temperature

[0064] T4 Temperature

[0065] T5 Temperature

[0066] T6 Temperature

Claims

Patent claims 1. A method for tempering elements of a motor vehicle (1), in which: - a first of the elements comprises a stator (7) and / or a rotor (11) of an electric machine (8), by means of which the motor vehicle (1) can be electrically driven; - a second of the elements comprises a component (9) of a power electronics system (10) via which the electrical machine (8) can be supplied with electrical energy; - the motor vehicle (1) has a temperature control circuit (13) through which a temperature control medium flows; - the motor vehicle (1) has a tempering device (14) by means of which the tempering medium is tempered and conveyed through the tempering circuit (13); - the elements are arranged in the temperature control circuit (13) and are tempered by means of the temperature control medium flowing through the temperature control circuit (13); - the motor vehicle (1) has an electronic computing device (4) which has a request module (16) and a temperature control module (17); - the request module (16) provides individual temperature control requests (A1, A2), namely: o a first temperature control request (A1) of the first element; and o a second temperature control request (A2) of the second element; - the temperature control module (17) receives the individual temperature control requests (A1, A2) provided by the request module (16); and - by means of the temperature control module (17), the temperature control device (14) is operated in dependence on the received temperature control requests (A1, A2), whereby the temperature control medium and thereby the elements are temperature controlled in dependence on the received temperature control requests (A1, A2).

2. Method according to claim 1, characterized in that: - by means of the temperature control device (14), in that the temperature control medium is tempered by means of the temperature control device (14), a flow temperature of the temperature control medium flowing through the temperature control circuit (13) is brought about, which flows into the respective element at the flow temperature; and - by means of the temperature control device (14) in that the temperature control medium is conveyed through the temperature control circuit (13) by means of the temperature control device (14), a volume flow of the temperature control medium is effected, which flows through the temperature control circuit (13) with the volume flow.

3. Method according to claim 2, characterized in that: - as a result of a first change in the temperature control requirements (A1, A2) by means of the temperature control module (17), the temperature control device (14) is operated in such a way that the flow temperature of the temperature control medium is changed, while the volume flow of the temperature control medium flowing through the temperature control circuit (13) caused by the temperature control device (14) remains unchanged; and - as a result of a second change in the temperature control requirements (A1, A2) by means of the temperature control module (17), the temperature control device (14) is operated in such a way that the volume flow of the temperature control medium flowing through the temperature control circuit (13) caused by the temperature control device (14) is changed, while the flow temperature of the temperature control medium remains unchanged.

4. Method according to claim 2 or 3, characterized in that: - as a result of the first change by means of the temperature control module (17), the temperature control device (14) is operated in such a way that the flow temperature of the temperature control medium is reduced, while the volume flow of the temperature control medium flowing through the temperature control circuit (13) caused by the temperature control device (14) remains unchanged; and - as a result of the second change by means of the temperature control module (17), the temperature control device (14) is operated in such a way that the volume flow of the temperature control circuit caused by the temperature control device (14) (13) flowing through the temperature control medium is increased, while the flow temperature of the temperature control medium remains unchanged.

5. Method according to one of claims 2 to 4, characterized in that: - if the first temperature control requirement (A1) changes in a first way, while the second temperature control requirement (A2) remains unchanged or changes in a second way, the temperature control device (14) is operated by means of the temperature control module (17) in such a way that the flow temperature of the temperature control medium is changed, while the temperature control device (14) the volume flow of the temperature control medium flowing through the temperature control circuit (13) remains unchanged; and - if the second temperature control requirement (A2) changes in a third way which is different from the second way, while the first temperature control requirement (A1) remains unchanged or changes in a fourth way which is different from the first way, the temperature control device (14) is operated by means of the temperature control module (17) in such a way that the volume flow of the temperature control circuit caused by means of the temperature control device (14) (13) flowing through the temperature control medium is changed, while the flow temperature of the temperature control medium remains unchanged.

6. Method according to one of claims 2 to 5, characterized in that: - the first way is that the first tempering requirement (A1) increases; - the third way is that the second tempering requirement (A1) increases. - if the first temperature control requirement (A1) changes in the first way, while the second temperature control requirement (A2) remains unchanged or changes in the second way, the temperature control device (14) is operated by means of the temperature control module (17) in such a way that the flow temperature of the temperature control medium is reduced, while the temperature control device (14) the volume flow of the temperature control medium flowing through the temperature control circuit (13) remains unchanged; and - if the second temperature control requirement (A2) changes in the third way, while the first temperature control requirement (A1) remains unchanged or changes in the fourth way, by means of the temperature control module (17) The temperature control device (14) is operated in such a way that the volume flow of the temperature control medium flowing through the temperature control circuit (13) caused by the temperature control device (14) is increased, while the flow temperature of the temperature control medium remains unchanged.

7. Method according to one of the preceding claims, characterized in that: - the first element comprises the stator; - a third of the elements comprises the rotor; - the third element is also arranged in the temperature control circuit (13) and is tempered by means of the temperature control medium flowing through the temperature control circuit (13); - a third of the individual tempering requirements provided by the requirement module (16) is a third tempering requirement of the third element; - the temperature control module (17) receives the individual temperature control requests provided by the request module (16); and - by means of the temperature control module (17), the temperature control device (14) is operated in dependence on the received temperature control requests, whereby the temperature control medium and thus the elements are temperature controlled in dependence on the received temperature control requests.

8. Method according to one of the preceding claims, characterized in that: - another of the individual temperature control requests provided by the request module (16) is a further temperature control request (A3) of the temperature control medium; - the temperature control module (17) receives the individual temperature control requests (A1, A2, A3) provided by the request module (16); and - by means of the temperature control module (17), the temperature control device (14) is operated in dependence on the received temperature control requests (A1, A2, A3), whereby the temperature control medium and thus the elements are temperature controlled in dependence on the received temperature control requests (A1, A2, A3).

9. Motor vehicle (1) which is designed to carry out a method according to one of the preceding claims.

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