WO2024256654A1 - Kühlmittelkreis für ein kraftfahrzeug mit einem vier-wege-mischventil, kraftfahrzeug und verfahren zum betreiben eines kühlmittelkreises - Google Patents
Kühlmittelkreis für ein kraftfahrzeug mit einem vier-wege-mischventil, kraftfahrzeug und verfahren zum betreiben eines kühlmittelkreises Download PDFInfo
- Publication number
- WO2024256654A1 WO2024256654A1 PCT/EP2024/066595 EP2024066595W WO2024256654A1 WO 2024256654 A1 WO2024256654 A1 WO 2024256654A1 EP 2024066595 W EP2024066595 W EP 2024066595W WO 2024256654 A1 WO2024256654 A1 WO 2024256654A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coolant
- valve
- conveyed
- chiller
- motor vehicle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H1/00885—Controlling the flow of heating or cooling liquid, e.g. valves or pumps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H2001/00307—Component temperature regulation using a liquid flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
- B60K2001/005—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric storage means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2410/00—Constructional features of vehicle sub-units
- B60Y2410/104—Hydraulic valves
Definitions
- the invention relates to a coolant circuit for a motor vehicle, with a cooling device for cooling a battery of the motor vehicle, and with a pump device by means of which coolant can be conveyed through the cooling device.
- An electrical heating device through which the coolant can flow and a chiller through which the coolant can flow are arranged in the coolant circuit.
- the chiller can be operated as an evaporator of a coolant circuit of the motor vehicle.
- the coolant circuit has a valve device with two coolant inlets and two coolant outlets.
- the invention also relates to a motor vehicle with such a coolant circuit and a method for operating a coolant circuit.
- the ambient air or the coolant circuit can be used as heat sources. can be used. However, at very low ambient temperatures, there may not be enough heat energy from such heat sources for the heat pump operation of the refrigerant circuit. In this case, it may be useful to provide heat in the coolant circuit using an electric heating device. This heat introduced into the coolant can then be used as a heat source in the heat pump operation of the refrigerant circuit.
- the thermal management system can have a four-way valve, which is arranged together with a pumping device in a coolant circuit of the thermal management system.
- a battery, an electric auxiliary heating device and a chiller are also arranged in the coolant circuit.
- the pumping device can only pump the coolant through the battery and through the electric auxiliary heating device or through the battery, through the electric auxiliary heating device and through the chiller. If, in this thermal management system, coolant is only to flow through the battery in order to compensate for temperature differences within the battery, another pumping device of the thermal management system is put into operation.
- the thermal management system described in DE 10 2021 207 249 A1 therefore has potential for improvement.
- the object of the present invention is therefore to provide a coolant circuit of the type mentioned at the outset, by means of which an improved cooling function can be realized with little effort, as well as to provide a motor vehicle with such a coolant circuit and a corresponding method for operating a coolant circuit.
- the coolant circuit according to the invention for a motor vehicle comprises a cooling device for cooling a battery of the motor vehicle.
- a pump device of the coolant circuit By means of a pump device of the coolant circuit, coolant can be conveyed through the cooling device.
- An electric heating device through which the coolant can flow and a chiller through which the coolant can flow are arranged in the coolant circuit.
- the chiller can be operated as an evaporator of a coolant circuit of the motor vehicle. Accordingly, the chiller is a heat exchanger through which the coolant can flow on the one hand and the refrigerant on the other.
- the coolant circuit has a valve device with two coolant inlets and two coolant outlets. The valve device can be operated in a first valve state.
- the coolant conveyed or conveyable by means of the pump device enters the valve device at one of the coolant inlets and exits the valve device at one of the coolant outlets.
- the coolant can be pumped through the cooling device by means of the pump device, bypassing both the electric heating device and the chiller.
- the pump device does not need to pump the coolant through the electric heating device or the chiller.
- the operation of the coolant circuit in the first valve state of the valve device is accompanied by a particularly low pressure loss. Accordingly, an improved cooling function can be achieved with very little effort using the coolant circuit.
- the flow through the cooling device provided for cooling the battery can be achieved with a comparatively low pumping power of the pump device. This is advantageous for efficient operation of the coolant circuit.
- the two coolant inlets and the two coolant outlets of the valve device arranged in the coolant circuit enable a plurality of different valve states of the valve device to be set, by means of which a plurality of cooling functions and/or tempering functions can be realized in the coolant circuit.
- the cooling device designed to cool the battery is in contact with the battery to be cooled in a way that allows heat conduction.
- the cooling device can comprise at least one cooling body through which the coolant can flow, to which heat can be transferred from battery cells of the battery by heat conduction in order to cool the battery.
- ordinal numbers such as “first”, “second”, “third” and so on are used above or below in relation to a valve state, these ordinal numbers do not have the meaning of a ranking or sequence. Rather, the respective designation of the The sole purpose of assigning such an ordinal number to a valve state is to distinguish the valve states from one another. The same applies if ordinal numbers such as “first”, “second”, “third” and so on are used for other devices in the coolant circuit.
- the valve device can preferably be operated in a second valve state, in which the coolant that can be or is being conveyed by means of the pump device enters the valve device at one of the coolant inlets and exits the valve device at one of the coolant outlets.
- the coolant can be conveyed through the chiller and through the cooling device, bypassing the electrical heating device.
- the chiller can thus be used to efficiently cool the battery by supplying the cooling device with coolant, which also flows through the chiller.
- the coolant evaporating in the coolant circuit can absorb heat and thus extract heat from the coolant. In this way, particularly intensive cooling of the battery can be achieved using the cooling device.
- the coolant in the second valve state, can be conveyed by means of the pump device, bypassing the electric heating device, starting from the valve device, first through the chiller and then through the cooling device. This is beneficial for a simple integration of the chiller into the coolant circuit.
- the valve device can be operated in a third valve state, in which the coolant that can be or is being conveyed by means of the pump device enters the valve device at one of the coolant inlets and exits the valve device at one of the coolant outlets.
- the coolant can be conveyed by means of the pump device, bypassing the chiller, through the cooling device and through the electric heating device.
- the temperature of the Battery This is advantageous at low ambient temperatures, for example, in order to quickly bring the battery to a favorable operating temperature.
- the battery has a high performance in terms of providing electrical energy, for example for an electric drive system of the motor vehicle. This is advantageous.
- the coolant in the third valve state of the valve device, can be conveyed by means of the pump device, bypassing the chiller, starting from the valve device, first through the cooling device and then through the electric heating device.
- This is advantageous with regard to a fluidically favorable integration of the electric heating device into the coolant circuit.
- the valve device can preferably be operated in a fourth valve state, in which the coolant that can be or is being conveyed by means of the pump device enters the valve device at one of the coolant inlets and exits the valve device at one of the coolant outlets.
- the coolant can be conveyed by means of the pump device, starting from the valve device, first through the chiller, then through the cooling device and then through the electric heating device. Accordingly, in this fourth valve state of the valve device, the chiller is supplied with the warmest coolant during operation of the coolant circuit before the coolant reaches the cooling device, which in this fourth valve state of the valve device serves to heat the battery.
- the vehicle's refrigerant circuit can be put into operation as a heat pump very early on.
- the chiller In order to operate the refrigerant circuit as a heat pump, it is necessary to ensure that the chiller has a certain minimum temperature. This ensures stable operation of the refrigerant circuit.
- this minimum temperature By supplying the particularly warm coolant to the chiller in the fourth valve state of the valve device during operation of the coolant circuit, namely the coolant heated by means of the electric heating device, this minimum temperature can be set very quickly on the chiller, which allows the activation or commissioning of the coolant circuit as a heat pump.
- the refrigerant circuit can be operated as a heat pump even at ambient temperatures of around -20°C if the heated coolant is first fed to the chiller using the electric heating device. This means that even at such low ambient temperatures, a passenger compartment of the motor vehicle can be heated very quickly using the refrigerant circuit operated as a heat pump. This leads to an increase in comfort for occupants of the passenger compartment of the motor vehicle.
- the valve device can be operated in a fifth valve state, in which the coolant conveyed or conveyable by means of the pump device enters the valve device at one of the coolant inlets and exits the valve device at both coolant outlets.
- the coolant can be conveyed by means of the pump device from the valve device both to the chiller and to the cooling device.
- the coolant coming from the cooling device can be conveyed by means of the pump device through the electric heating device before entering the valve device.
- Such an operating state of the coolant circuit is particularly advantageous in order to ensure stable operation of the coolant circuit. If the entire volume flow of coolant conveyed by the pumping device is conveyed through both the cooling device of the battery and the chiller, this can lead to an undesirably high temperature level of the coolant at the chiller. This is especially true if the volume flow of coolant conveyed by the pumping device The volume flow to be provided, which is to be conveyed through the cooling device for the battery, is based on the temperature control requirements of the battery. In this case in particular, it is therefore advantageous if, by dividing the volume flow at the valve device by operating the valve device in the fifth valve state, not the full volume flow conveyed by the pump device flows through the chiller, but only a reduced volume flow.
- the electric heating device When operating the valve device in the respective valve state, it can advantageously be ensured that the electric heating device is flowed through unidirectionally, i.e. always in the same direction, provided that flow through the electric heating device is intended at all in the respective operating state of the coolant circuit.
- This has particular advantages with regard to the arrangement of the electric heating device in the motor vehicle. This is because there is great freedom with regard to the type of arrangement of the electric heating device in the motor vehicle. In particular, this avoids the electric heating device having to be installed in a certain installation position. In addition, good venting of the electric heating device can be easily ensured in this way. In addition, particularly robust operation of the electric heating device is guaranteed.
- the valve device designed as a four-way valve, enables the heat provided by the electric heating device to be distributed both to the cooling device intended for cooling or heating the battery and to the chiller.
- Heating the chiller can support the operation of the refrigerant circuit as a heat pump in certain operating cases. This applies in particular to operating cases in which not enough heat energy can be obtained from other sources to set a certain minimum temperature on the chiller. It is therefore advantageous for the coolant circuit to have the electric heating device and the valve device with the two coolant inlets and the two coolant outlets.
- the valve device preferably has a closure means which can be moved into a plurality of positions in the fifth valve state. In the respective positions, different partial flows of the coolant can be conveyed by operating the pump device from the valve device to both the chiller and the cooling device. As a result, the volume flow to be supplied to the chiller can be metered very precisely. This is advantageous with regard to stable operation of the chiller as an evaporator of the coolant circuit of the motor vehicle.
- the electric heating device, the cooling device, the valve device and the pump device are arranged in a first sub-branch of the coolant circuit.
- the chiller and a further pump device of the coolant circuit are arranged in a second sub-branch of the coolant circuit.
- the coolant can be conveyed through the second sub-branch by operating the further pump device, regardless of whether the coolant flows through the first sub-branch.
- Such a structure of the coolant circuit is advantageous, for example, when components of the motor vehicle arranged in the second sub-branch of the coolant circuit, such as an electric drive device and/or power electronics and/or at least one electrical converter or power converter and/or at least one control device or the like, give off heat, which can be transferred to the coolant evaporating in the chiller in the heat pump operation of the coolant circuit of the motor vehicle.
- the efficient operation of the coolant circuit as a heat pump is then possible without that the electric heating device provides heat for this
- heat provided by the electrical heating device can be used to heat the battery via the cooling device, which in this case serves as a heat source for the battery and can therefore also be generally referred to as a temperature control device.
- a first bypass line is arranged in the first partial branch, via which the coolant that can be conveyed by means of the pump device can be conveyed through the cooling device, bypassing the electric heating device and the valve device.
- a second bypass line can be arranged in the second partial branch, via which the coolant that can be conveyed by means of the pump device can be conveyed through a section of the second partial branch, bypassing the further pump device.
- the motor vehicle according to the invention has a coolant circuit according to the invention and a battery.
- the battery is designed to supply at least one electric drive device of the motor vehicle with electrical energy.
- the coolant circuit can advantageously be used to cool and heat the battery.
- the battery can be designed in particular as a high-voltage battery or high-voltage storage device, which has a nominal voltage of more than 60 volts and preferably of up to several 100 volts. If the electrical heating device of the coolant circuit is supplied with electrical energy by the high-voltage battery, the electrical heating device designed as an auxiliary heating device can be referred to as a high-voltage heater.
- the at least one electric drive device of the motor vehicle is designed to cause or at least assist the motor vehicle to move.
- the motor vehicle can be designed in particular as an electric vehicle or as a hybrid vehicle.
- cooling and heating the battery is particularly advantageous so that it can provide electrical energy to the desired extent for the electric drive system of the motor vehicle.
- the motor vehicle is designed as an electric vehicle or hybrid vehicle, it is particularly advantageous to operate the coolant circuit, in which the chiller and the coolant circuit are integrated, either as an air conditioning system or as a heat pump.
- the coolant circuit has a cooling device for cooling a battery of the motor vehicle and a pumping device.
- the pumping device is used to convey coolant through the cooling device.
- An electric heating device through which the coolant can flow and a chiller through which the coolant can flow are arranged in the coolant circuit, wherein the chiller can be operated as an evaporator of a coolant circuit of the motor vehicle.
- the coolant circuit has a valve device with two coolant inlets and two coolant outlets.
- the valve device is in a first Valve state in which the coolant conveyed by means of the pump device enters the valve device at one of the coolant inlets and exits the valve device at one of the coolant outlets. In the first valve state of the valve device, the coolant is conveyed by means of the pump device through the cooling device, bypassing both the electric heating device and the chiller.
- the invention therefore also includes further developments of the method according to the invention which have features as have already been described in connection with the further developments of the coolant circuit according to the invention and the motor vehicle according to the invention. For this reason, the corresponding further developments of the method according to the invention are not described again here.
- the motor vehicle according to the invention is preferably designed as a motor vehicle, in particular as a passenger car or truck, or as a passenger bus.
- the invention also includes the combinations of the features of the described embodiments.
- the invention therefore also includes implementations which each comprise a combination of the features of several of the described embodiments, unless the embodiments are described as mutually exclusive.
- Fig. 1 shows schematically and in detail a coolant circuit for a motor vehicle, which has a valve device operable in several valve states;
- Fig. 2 shows the coolant circuit with the valve device in a first valve state, in which coolant flows through a cooling device provided for cooling a battery of the motor vehicle, whereby an electric heating device and a chiller are bypassed;
- Fig. 3 shows the coolant circuit according to Fig. 1 with the valve device operated in a second valve state, in which a cooling operation of the battery is realized;
- Fig. 4 shows the coolant circuit according to Fig. 1, wherein the valve device is operated in a third valve state in which the battery is heated;
- Fig. 5 shows the coolant circuit according to Fig. 1, wherein the valve device is operated in a fourth valve state in which both the chiller and the battery are heated by means of heat provided by the electrical heating device;
- Fig. 6 shows the coolant circuit according to Fig. 1, wherein the valve device is operated in a fifth valve state in which a coolant flowing from the valve device via two coolant outlets Coolant flow to the battery-associated
- Fig. 7 shows a highly schematic view of the motor vehicle with the battery as well as with an electric drive device for moving the motor vehicle.
- Fig. 1 shows a schematic representation of a coolant circuit 10 of a motor vehicle 12 (see Fig. 7) not shown in detail in Fig. 1.
- the motor vehicle 12 has a battery 14, by means of which at least one electric drive device 16 of the motor vehicle 12 can be supplied with electrical energy.
- the at least one electric drive device 16 of the motor vehicle 12 (see Fig. 7) is designed to move the motor vehicle 12 or at least to assist the movement of the motor vehicle 12. Accordingly, the motor vehicle 12 can be designed as an electric vehicle or as a hybrid vehicle.
- a cooling device 18 is arranged in the coolant circuit 10.
- the cooling device 18 can also be referred to as a temperature control device.
- the cooling device 18 serves to cool the battery 14 and in the heating case, heat is introduced into the battery 14 via the cooling device 18.
- this temperature control device will be referred to below as a cooling device 18.
- the cooling device 18 is preferably arranged on the battery 14. This allows waste heat from Battery cells of the battery 14 can be introduced into the cooling device 18, or heat can be introduced into the battery 14 very directly via heat conduction in order to heat the battery 14 by means of the cooling device 18.
- a first pump device 20 is arranged in the coolant circuit 10, by means of which coolant can be conveyed through the cooling device 18. Furthermore, an electrical heating device 22 through which the coolant can flow is arranged in the coolant circuit 10. Because the electrical heating device 22 is supplied with electrical energy by the battery 14, which is preferably designed as a high-voltage battery, the electrical heating device 22 can be referred to as a high-voltage heater.
- a chiller 24 is also arranged in the coolant circuit 10.
- the chiller 24 is a heat exchanger through which the coolant can flow on the one hand and a refrigerant on the other. Accordingly, the chiller 24 is integrated both into the coolant circuit 10 and into a refrigerant circuit 26, which is only shown schematically and in detail in Fig. 1.
- the chiller 24 can be operated as an evaporator of the refrigerant circuit 26. Accordingly, the chiller 24 can be supplied with refrigerant, which is expanded by means of an expansion device (not shown here) arranged upstream of the chiller 24. The expanded refrigerant can absorb heat from the coolant. The refrigerant is then fed to a compressor (not shown) of the refrigerant circuit 26. From the compressor, the compressed and therefore hot refrigerant reaches a heating register (not shown) which is designed as a refrigerant-air heat exchanger. The air passing over the heating register can be introduced into a passenger compartment 28 (see Fig. 7) of the motor vehicle 12 in order to heat the passenger compartment 28.
- the refrigerant circuit 26 can be operated as a heat pump when it is necessary to generate heat in the passenger compartment 28 of the motor vehicle 12. Furthermore, it is preferably possible to operate the refrigerant circuit 26 as an air conditioning system, wherein the air to be introduced into the passenger compartment 28 is cooled.
- a valve device 30 is arranged in the coolant circuit 10, which is designed as a four-way valve according to Fig. 1. Accordingly, the valve device 30 has exactly two coolant inlets 32, 34 and exactly two coolant outlets 36, 38. Respective lines of the coolant circuit 10 are connected to both the two coolant inlets 32, 34 and the two coolant outlets 36, 38 of the valve device 30.
- Fig. 1 schematically shows a closure means 40 of the valve device 30, which makes it possible to release at least one of the coolant inlets 32, 34 and at least one of the coolant outlets 36, 38 in the respective valve states of the valve device 30. Furthermore, the closure means 40 preferably makes it possible to release both coolant inlets 32, 34 and only one of the coolant outlets 36, 38 at the same time.
- the closure means 40 preferably makes it possible to open only one of the coolant inlets 32, 34 and at the same time both coolant outlets 36, 38.
- a volume flow of the coolant to be distributed between the respective coolant outlets 36, 38 can preferably be adjusted as required.
- valve device 30 can be operated in a first valve state in which the coolant conveyed by means of the pump device 20 enters the valve device 30 at one of the coolant inlets 32, 34, for example at the first coolant inlet 32, and exits the valve device 30 at one of the coolant outlets 36, 38, for example at the first coolant outlet 36.
- the corresponding adjustment position of the valve or the valve device 30 is illustrated in Fig. 2 by a further schematic representation in which there is no fluidic connection between the second coolant inlet 34 and the second coolant outlet 38.
- the coolant is pumped through the cooling device 18 by means of the pump device 20, bypassing both the electric heating device 22 and the chiller 24. Accordingly, the battery 14 is connected neither to a heat source nor to a heat sink. However, pumping the coolant through the cooling device 18 results in temperature differences within the battery 14 being equalized. Temperature differences within the battery 14 can be due to the fact that the battery cells (not shown) of the battery 14 have different temperatures from one another.
- the battery cells of the battery 14 can be arranged in respective battery modules, wherein the battery 14 can have a plurality of such battery modules.
- the coolant flows through the cooling device 18 according to the operating state of the coolant circuit 10 shown in Fig. 2, temperature differences between such battery modules of the battery 14 can also be well compensated.
- the valve device 30 can be operated in a second valve state in which the coolant conveyed by means of the pump device 20 enters the valve device 30 at one of the coolant inlets 32, 34, for example at the first coolant inlet 32. At one of the The coolant exits the valve device 30 via coolant outlets 36, 38, for example at the second coolant outlet 38.
- the coolant is conveyed through the chiller 24 and through the cooling device 18 by means of the pump device 20, bypassing the electrical heating device 22.
- the coolant preferably flows from the valve device 30, first through the chiller 24 and then via a bypass line 42 back to the pump device 20 and from the pump device 20 on to the cooling device 18.
- the bypass line 42 serves in this case to bypass a further or second pump device 44 of the coolant circuit 10, the function of which will be explained in more detail later.
- a first check valve 52 arranged in the bypass line 42 ensures, according to Fig. 3, that the coolant can only flow through the bypass line 42 in one direction.
- the battery 14 can be cooled by means of the cooling device 18, which is supplied with the coolant coming from the chiller 24 and thus cooled. Accordingly, the battery 14 is connected to the chiller 24.
- the valve device 30 can be operated in a third valve state in which the coolant conveyed by means of the pump device 20 enters the valve device 30 at one of the coolant inlets 32, 34, for example at the second coolant inlet 34. At one of the coolant outlets 36, 38, for example at the first coolant outlet 36, the coolant exits the valve device again in the third valve state of the valve device 30.
- the coolant is conveyed by means of the pump device 20, bypassing the chiller 24, through the cooling device 18 and through the electric heating device 22.
- the coolant is conveyed from the valve device 30 first via the pump device 20 to the Cooling device 18 is then conveyed through the cooling device 18 and subsequently through the electrical heating device 22 when the valve device 30 is in the third valve state.
- the valve device 30 enables the battery to be heated by supplying the cooling device 18 with the coolant, which is heated by means of the electrical heating device 22.
- a first sub-branch 46 of the coolant circuit 10 is decoupled from a second sub-branch 48 of the coolant circuit 10.
- the electric heating device 22, the cooling device 18, the valve device 30 and the pump device 20 or first pump device 20 are arranged in the first sub-branch 46.
- the chiller 24 and the second pump device 44 are arranged in the second sub-branch 48 of the coolant circuit 10.
- Further components 50 are arranged in the second sub-branch 48, the cooling and/or heating of which may be desirable.
- the components 50 can be supplied with coolant by means of at least one heat exchanger integrated into the second sub-branch 48.
- the at least one heat exchanger can be designed to dissipate heat from the coolant and/or to absorb heat from the coolant.
- the components 50 can comprise at least one heat exchanger for cooling the electric drive device 16 (see Fig. 7) of the motor vehicle 12 and/or at least one heat exchanger for cooling at least one power electronics and/or at least one electrical converter or power converter and/or at least one control unit of the motor vehicle 12.
- the components 50 can comprise a heat exchanger which is designed as an air-cooled heat exchanger and can be cooled in particular by means of ambient air. For reasons of simplicity, such a coolant-air heat exchanger is not shown in more detail in the second partial branch 48 of the coolant circuit 10.
- At least one further valve device can be arranged in the second partial branch 48 of the coolant circuit 10, by means of which, during operation of the second pump device 44, corresponding coolant flows through the components 50 shown only schematically here and/or the coolant-air heat exchanger (not shown) can be adjusted as required.
- the corresponding operating modes do not need to be explained in more detail here.
- the use of the electric heating device 22 to provide heat for the chiller 24 is particularly advantageous when the components 50 arranged in the second sub-branch 48 are not able to provide sufficient heat for the chiller 24.
- the first sub-branch 46 can be operated decoupled from the second sub-branch 48.
- a further ambient line 54 can be used, which is arranged in the first sub-branch 46.
- the coolant that can be conveyed by means of the pump device 20 or first pump device 20 can be conveyed through the cooling device 18 via this further ambient line 54, bypassing the electric heating device 22 and the valve device 30.
- operation of the coolant circuit 10 with a particularly low pressure loss is achievable if only temperature differences between the individual battery cells of the battery 14 and/or between individual battery modules of the battery 14.
- the valve device 30 can be operated in a fourth valve state, in which the coolant conveyed by means of the pump device 20 enters the valve device 30 at one of the coolant inlets 32, 34, for example at the second coolant inlet 34.
- the coolant exits the valve device 30 again at one of the two coolant outlets 36, 38, for example at the second coolant outlet 38.
- the coolant is pumped by means of the pump device 20 starting from the valve device 30, first through the chiller 24 and then via the bypass line 42 back to the pump 20.
- the coolant then first passes into the cooling device 18 and then through the electric heating device 22 back to the valve device 30.
- the chiller 24 is supplied with the coolant that has the highest temperature level within the coolant circuit 10. Consequently, the chiller 24 can be brought very quickly to a desired minimum temperature, which allows particularly trouble-free and robust operation of the coolant circuit 26.
- the heat pump operation of the refrigerant circuit 26 can be carried out even at very low ambient temperatures. Accordingly, the passenger compartment 28 of the motor vehicle 12 can be supplied with warm air very quickly, so that a comfortable temperature is quickly provided for occupants of the motor vehicle 12 in the passenger compartment 28.
- the coolant which is slightly less warm after flowing through the chiller 24, can still be used to cool the cooling device 18 To release heat to the battery 14.
- both the battery 14 and the chiller 24 are connected to the electrical heating device 22, so that both the chiller 24 and the battery 14 can be heated.
- the valve device 30 can be operated in the fifth valve state, in which the coolant conveyed by means of the pump device 20 enters the valve device 30 at one of the coolant inlets 32, 34, for example at the second coolant inlet 34. However, here the coolant simultaneously exits the valve device 30 again at both coolant outlets 36, 38.
- the coolant exiting from the first coolant outlet 36 reaches a branching point 56 of the first partial branch 46 of the coolant circuit 10.
- a first partial flow of the coolant branches off to the pump device 20 and further to the cooling device 18.
- a second partial flow can continue from the branching point 56 via a connecting line 58 into the second partial branch 48 of the coolant circuit 10.
- the coolant coming from the connecting line 58 can reach the chiller 24.
- the coolant exiting the valve device 30 at the second coolant outlet 38 can also be introduced into the second partial branch 48 of the coolant circuit 10 via a further connecting line 60.
- a second check valve 62 prevents coolant introduced into the second partial branch 48 via the second connecting line 60 from reaching the first connecting line 58.
- the second check valve 62 is arranged between a junction 64, at which the second connecting line 60 flows into the second partial branch 48, and the first connecting line 58.
- the flow coming from the second connecting line 60 Coolant therefore flows from the inlet point 64 to the chiller 24.
- the coolant introduced into the valve device 30 via the first coolant inlet 32 can be distributed to the cooling device 18 and the chiller 24 via both coolant outlets 36, 38.
- the volume flow of coolant at the chiller 24 is not too high, so that the chiller 24 is not overloaded with regard to providing a cooling capacity.
- the valve device 30 designed as a four-way valve thus enables a large number of cooling functions and/or heating functions to be implemented in the coolant circuit 10. It can always be ensured that the chiller 24 is operated in an operating state which allows stable operation of the coolant circuit 26.
- the electric heating device 22 is arranged such that in the combined heating case in which the heating device 22 supports the heat pump on the one hand and the battery 14 is to be heated on the other hand, the coolant flows through or flows through first the chiller 24 and then the cooling device 18 assigned to the battery 14. This is particularly advantageous with regard to rapid heating of the passenger compartment 28 in the heat pump mode of the coolant circuit 26.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP24735540.7A EP4727783A1 (de) | 2023-06-16 | 2024-06-14 | Kühlmittelkreis für ein kraftfahrzeug mit einem vier-wege-mischventil, kraftfahrzeug und verfahren zum betreiben eines kühlmittelkreises |
| CN202480034288.6A CN121194891A (zh) | 2023-06-16 | 2024-06-14 | 具有四通混合阀的用于机动车的冷却介质回路、机动车和用于运行冷却介质回路的方法 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102023115860.0 | 2023-06-16 | ||
| DE102023115860.0A DE102023115860A1 (de) | 2023-06-16 | 2023-06-16 | Kühlmittelkreis für ein Kraftfahrzeug mit einem Vier-Wege-Mischventil, Kraftfahrzeug und Verfahren zum Betreiben eines Kühlmittelkreises |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024256654A1 true WO2024256654A1 (de) | 2024-12-19 |
Family
ID=91664196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2024/066595 Ceased WO2024256654A1 (de) | 2023-06-16 | 2024-06-14 | Kühlmittelkreis für ein kraftfahrzeug mit einem vier-wege-mischventil, kraftfahrzeug und verfahren zum betreiben eines kühlmittelkreises |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4727783A1 (de) |
| CN (1) | CN121194891A (de) |
| DE (1) | DE102023115860A1 (de) |
| WO (1) | WO2024256654A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102024110690A1 (de) | 2024-04-17 | 2025-10-23 | Audi Aktiengesellschaft | Kühlmittelkreislauf mit Ventileinrichtung für eine anteilige Kühlmittelvolumenverteilung und Kraftfahrzeug mit einem solchen Kühlmittelkreislauf |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120225341A1 (en) * | 2011-03-03 | 2012-09-06 | Gregory Major | Thermal management of cabin and battery pack in hev/phev/bev vehicles |
| DE102020206727A1 (de) * | 2020-05-28 | 2021-12-02 | Volkswagen Aktiengesellschaft | Thermomanagementsystem für eine Batterie eines Kraftfahrzeugs, und Verfahren für ein Thermomanagement für eine Batterie eines Kraftfahrzeug |
| DE102021109740A1 (de) * | 2021-04-19 | 2022-10-20 | Audi Aktiengesellschaft | Kühlsystem mit Zentralventileinrichtung für ein Elektrofahrzeug und Elektrofahrzeug mit einem solchen Kühlsystem |
| WO2022256921A1 (en) * | 2021-06-07 | 2022-12-15 | Litens Automotive Partnership | Improvements to thermal management system, and valve and valve module therefor |
| DE102021207249A1 (de) | 2021-07-08 | 2023-01-12 | Volkswagen Aktiengesellschaft | Thermomanagementsystem für eine Batterie eines Kraftfahrzeugs und Kraftfahrzeug mit einem Thermomanagementsystem |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019210029A1 (de) | 2019-07-08 | 2021-01-14 | Volkswagen Aktiengesellschaft | Kühlkreislauf |
-
2023
- 2023-06-16 DE DE102023115860.0A patent/DE102023115860A1/de active Pending
-
2024
- 2024-06-14 EP EP24735540.7A patent/EP4727783A1/de active Pending
- 2024-06-14 WO PCT/EP2024/066595 patent/WO2024256654A1/de not_active Ceased
- 2024-06-14 CN CN202480034288.6A patent/CN121194891A/zh active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120225341A1 (en) * | 2011-03-03 | 2012-09-06 | Gregory Major | Thermal management of cabin and battery pack in hev/phev/bev vehicles |
| DE102020206727A1 (de) * | 2020-05-28 | 2021-12-02 | Volkswagen Aktiengesellschaft | Thermomanagementsystem für eine Batterie eines Kraftfahrzeugs, und Verfahren für ein Thermomanagement für eine Batterie eines Kraftfahrzeug |
| DE102021109740A1 (de) * | 2021-04-19 | 2022-10-20 | Audi Aktiengesellschaft | Kühlsystem mit Zentralventileinrichtung für ein Elektrofahrzeug und Elektrofahrzeug mit einem solchen Kühlsystem |
| WO2022256921A1 (en) * | 2021-06-07 | 2022-12-15 | Litens Automotive Partnership | Improvements to thermal management system, and valve and valve module therefor |
| DE102021207249A1 (de) | 2021-07-08 | 2023-01-12 | Volkswagen Aktiengesellschaft | Thermomanagementsystem für eine Batterie eines Kraftfahrzeugs und Kraftfahrzeug mit einem Thermomanagementsystem |
Also Published As
| Publication number | Publication date |
|---|---|
| CN121194891A (zh) | 2025-12-23 |
| DE102023115860A1 (de) | 2024-12-19 |
| EP4727783A1 (de) | 2026-04-22 |
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