Thermal system for managing temperatures of an electric vehicle, comprising two condensers and two evaporators

Abstract

The invention relates to a thermal system (100) for managing temperatures of an electric vehicle (1), the thermal system (100) comprising a first primary heat pump circuit (C1), the circuit (C1) comprising: - a first condenser (12a), - a second condenser (12b), - a first evaporator (16a), and - a second evaporator (16b), through all of which a refrigerant flows, the thermal system (100) comprising a first secondary circuit (C4) for thermal management of a set of electronic and electrical components (41) of such an electric vehicle (1), the circuit (C4) comprising: - a first circulation pump (46), - the second evaporator (16b), - the first condenser (12a), - a multi-way valve, in particular an eight-way valve (42), - a radiator (43), and - a traction and / or propulsion battery (44) of such an electric vehicle (1) and an electrical heating resistor (47) mounted in thermal contact, in particular conductive thermal contact, with the battery (44).

Description

[0001] DESCRIPTION

[0002] TITLE: Thermal temperature management system for an electric vehicle comprising two condensers and two evaporators.

[0003] Technical field of the invention

[0004] The invention relates to a thermal temperature management system comprising such a heat pump circuit including two condensers and two evaporators for the thermal management of an electric vehicle. The invention further relates to an electric vehicle comprising such a thermal temperature management system. The invention further relates to a method for operating such a thermal temperature management system. The invention further relates to an electric vehicle comprising hardware and / or software means for implementing such an operating method.

[0005] Prior art

[0006] A motor vehicle typically includes means for heating and / or cooling the passenger compartment, and / or electrical components of a powertrain for traction and / or propulsion. This is particularly true for vehicles with electric traction and / or propulsion systems. Such heating and / or cooling systems require the use of a refrigerant. To mitigate the effects of global warming, a specific refrigerant is now required.

[0007] One such refrigerant is propane. However, propane is highly flammable. Therefore, it is necessary not only to limit the amount of propane carried in such an electric vehicle, but also to ensure that it cannot leak. Finally, also for safety reasons, it is essential not to use this fluid in the passenger compartment of such an electric vehicle. These constraints necessitate an installation with indirect heating and cooling circuits, meaning that the installation includes:

[0008] - a primary thermodynamic circuit through which the refrigerant circulates, and - secondary circuits or secondary loops thermally linked to the primary thermodynamic circuit, enabling remote heating and / or cooling of the primary thermodynamic circuit. This results in a complex and bulky installation, which is problematic given the limited space available within a motor vehicle.

[0009] Presentation of the invention

[0010] The aim of the invention is to provide a thermal system that overcomes the above drawbacks. In particular, the thermal system comprises circuits that enable a large number of heating, warming, and cooling functions for different parts or components of an electric vehicle, while remaining compact and taking into account the potential hazards of the refrigerant.

[0011] Summary of the invention

[0012] The invention relates to a thermal system for temperature management of an electric vehicle comprising a first primary heat pump circuit, the circuit comprising:

[0013] - a first condenser, and

[0014] - a second condenser, and

[0015] - a first evaporator, and

[0016] - a second evaporator,

[0017] traversed by a refrigerant fluid,

[0018] the thermal system comprising a first secondary thermal management circuit for a set of electronic and electrical components of such an electric vehicle, the circuit comprising:

[0019] - a first circulator,

[0020] - the second evaporator, - the first condenser,

[0021] - a multi-way valve, in particular an eight-way valve,

[0022] - a radiator, and

[0023] - a traction and / or propulsion battery of such an electric vehicle and an electric heating resistance mounted in thermal connection, in particular in thermal connection by conduction, on the battery.

[0024] The first and second condensers can be mounted in parallel, and / or the first and second evaporators can be mounted in parallel.

[0025] The first primary circuit may include:

[0026] - a first expansion valve upstream of the first evaporator, and

[0027] - a second expansion valve upstream of the second evaporator.

[0028] The refrigerant can be liquefied petroleum gas or propane.

[0029] The first primary circuit may include a single compressor.

[0030] The first primary circuit may include a compressor bypass valve.

[0031] The first primary circuit may include:

[0032] - a receptacle, in particular a watertight or substantially watertight receptacle,

[0033] - pipes for the circulation of the refrigerant, extending in particular between the condensers and the evaporators,

[0034] the pipes, the two condensers and the two evaporators being housed within the receptacle.

[0035] The thermal system may include:

[0036] - a second secondary passenger compartment cooling circuit equipped with a first additional circulator, and / or- a third secondary passenger compartment heating circuit equipped with a second additional circulator.

[0037] According to the invention, a method for operating a thermal system defined above is characterized in that the method comprises an operating mode of the thermal system in which the eight-way valve is configured in a first mode in which:

[0038] - the radiator is thermally connected in series with the first condenser, a second circulator and the set of electronic and electrical components, and / or - the battery is thermally connected in series with the second evaporator and the first circulator.

[0039] The process may include a mode of operation of the thermal system in which the eight-way valve is configured in a second mode in which:

[0040] - the battery is thermally connected in series with the first condenser, a second circulator and the set of electronic and electrical components, and / or - the radiator is thermally connected in series with the second evaporator and the first circulator.

[0041] According to the invention, an electric vehicle comprises a thermal system defined previously.

[0042] According to the invention, an electric vehicle includes hardware and / or software means intended for the implementation of the process defined above.

[0043] According to the invention, a computer program product comprises program code instructions recorded on a computer-readable medium to implement the steps of the process defined above when said program is run on a computer. According to the invention, a computer program product downloadable from a communication network and / or recorded on a computer-readable and / or computer-executable data medium is characterized in that it comprises instructions which, when the program is executed by the computer, cause the computer to implement the process defined above.

[0044] According to the invention, a computer-readable data storage medium on which a computer program is recorded includes program code instructions for implementing the method defined above.

[0045] According to the invention, a computer-readable data storage medium comprising instructions which, when executed by a computer, cause the computer to implement the process defined above.

[0046] According to the invention, a signal from a data carrier carries the product computer program defined previously.

[0047] Presentation of the figures

[0048] These objects, features and advantages of the present invention will be described in detail in the following description of an embodiment and non-limiting variations, with reference to the accompanying figures, among which:

[0049] Figure 1 is a schematic view of an electric vehicle according to one embodiment of the invention.

[0050] Figure 2 is a schematic view of a thermal system of the electric vehicle according to an embodiment of the invention.

[0051] Figure 3 is a schematic view of an eight-way valve of the thermal system according to one embodiment of the invention, the eight-way valve being configured according to a first mode of operation.

[0052] Figure 4 is a schematic view of the eight-way valve of the thermal system according to the embodiment of the invention, the eight-way valve being configured according to a second mode of operation.

[0053] Detailed description

[0054] As illustrated in Figure 1, an electric vehicle 1, preferably a motor vehicle, comprises a passenger compartment 2. The vehicle 1 includes a train, or system, or set of electronic and electrical components 41 for the traction and / or propulsion of the vehicle. The vehicle 1, in particular one of the components of the set of electronic and electrical components 41, includes at least one electric motor 7. The vehicle 1 includes a battery 44 to electrically power the at least one electric motor 7 and / or store electrical energy. The vehicle 1 also includes a thermal system 100. Finally, the electric vehicle 1 includes hardware and / or software means 5 for implementing a method of operating the thermal system 100; these means may include one or more computers and / or software modules.

[0055] More specifically, as illustrated in Figure 2, system 100 includes, for the thermal management of vehicle 1:

[0056] - a first primary thermodynamic circuit of heat pump C1,

[0057] - a second secondary thermal circuit C2 in thermal connection with the vehicle's passenger compartment,

[0058] - a third secondary thermal circuit C3 in thermal connection with the vehicle's passenger compartment, and

[0059] - a fourth secondary thermal circuit C4 in thermal connection with electrical drive components 41 of the vehicle.

[0060] Circuit C1 comprises a first evaporator 16a and a second evaporator 16b, or chillers, typically water-cooled. Circuit C1 also includes a first condenser 12a and a second condenser 12b. These four components 12a, 12b, 16a, and 16b of circuit C1 are traversed by a refrigerant. It should be noted that in circuit C1, the first and second condensers 12a and 12b are connected in parallel, and / or the first and second evaporators 16a and 16b are connected in parallel. Preferably, circuit C1 also includes a first expansion valve 15a upstream of the first evaporator 16a and a second expansion valve 15b upstream of the second evaporator 16b. In other words, in circuit C1, two parallel branches each comprise an expansion valve, preferably electronic, and an evaporator. Advantageously, the refrigerant flowing through circuit C1 is liquefied petroleum gas or propane.

[0061] Circuit C1 preferably includes a single compressor 10. Optionally, circuit C1 includes a bypass valve 21 for the compressor 10 so as to obtain additional heating by causing a partial recirculation of the refrigerant flow in the compressor 10.

[0062] The circuit C1 is advantageously encapsulated in a receptacle 3 or a box 3. The receptacle is advantageously sealed or substantially sealed. The circuit C1 further includes pipes 4 for the circulation of the refrigerant. The pipes 4 extend, in particular, between the condensers and the evaporators. As illustrated in Figure 2, the pipes 4, the two condensers 12a, 12b, and the two evaporators 16a, 16b are housed within the receptacle 3, the receptacle 3 being schematically represented by dashed lines in Figure 2.

[0063] Circuit C1 may also include a gas regulator 17, for example electronic, for example to allow two cooling temperature levels.

[0064] Circuit C1 preferably includes an accumulator 20, electronic variable-area valves 11a, 11b, check valves 13a, 13b, 18, and two junction points 14, 19. The accumulator 20 is a refrigerant reservoir whose function is to separate the liquid / vapor phases to supply vapor to the compressor. Optionally, valves 11a, 11b, and even valve 21 can be combined into a single four-way valve (not shown). Optionally, the two check valves 13a, 13b, and junction point 14 can be combined into a single valve (not shown).

[0065] The circuit C1 and the receptacle 3 constitute a thermodynamic machine.

[0066] In the operating mode of the thermodynamic machine, the refrigerant:

[0067] - is taken in vapor form from accumulator 20, then

[0068] - is pressurized in compressor 10, then

[0069] - circulates in the second condenser 12b where it releases heat (to the third circuit C3) and cools down, then

[0070] - is relaxed in the second 15b regulator, then

[0071] - circulates in the second evaporator 16b where it receives heat (from the fourth circuit C4) and is heated, then

[0072] - returns to accumulator 20.

[0073] In another operating mode of the thermodynamic machine, the refrigerant fluid:

[0074] - is taken in vapor form from accumulator 20, then

[0075] - is pressurized in compressor 10, then

[0076] - circulates in the first condenser 12a where it releases heat (to the fourth circuit C4) and cools down, then

[0077] - is relaxed in the first 15a regulator, then

[0078] - circulates in the first evaporator 16a where it receives heat (from the second circuit C2) and is heated, then

[0079] - returns to the accumulator 20. The second secondary thermal circuit C2 cools the passenger compartment. In addition to the first evaporator 16a, the second secondary thermal circuit C2 includes a heater 51 (preferably a water / air heat exchanger) and a first additional circulator 50, such as a water pump. The second secondary thermal circuit C2 may also include an expansion vessel 52. The circulator 50 circulates a heat transfer fluid through the first evaporator 16a and the heater 51 to cool the passenger compartment, particularly the air inside the passenger compartment, which is also circulated through the heater 51.

[0080] The third secondary heating circuit C3 heats the passenger compartment. In addition to the second condenser 12b, this circuit includes a heater 31 (preferably a water-to-air heat exchanger) and a second circulator 30, such as a water pump. The third secondary heating circuit C3 may also include an expansion vessel 32. The circulator 30 circulates a heat transfer fluid through the second condenser 12b and the heater 31 to heat the passenger compartment, specifically the air inside the compartment, which is also circulated through the heater 31.

[0081] The air heaters 31, 51 are therefore traversed by an airflow A1 coming from a heating and air conditioning device of the vehicle.

[0082] The fourth secondary thermal circuit C4 manages the thermal performance of all the electronic and electrical components 41 of the electric vehicle 1. The fourth secondary thermal circuit C4 includes an eight-way valve 42 to which the following are connected:

[0083] - a first thermal branch 46, 16b,

[0084] - a second thermal branch 44,

[0085] - a third thermal branch 43,

[0086] - a fourth thermal branch 40, 41, 12a. The first thermal branch comprises:

[0087] - a circulator 46, for example of the water pump type, and

[0088] - the second evaporator 16b.

[0089] The second thermal branch comprises the battery 44 or a water / dielectric heat exchanger in the case of a battery 44 cooled by a dielectric fluid. An electric heating element 47 is thermally connected to the battery 44. Preferably, the electric heating element 47 is mounted on the battery 44. Preferably, the electric heating element 47 heats the battery by thermal conduction. To achieve this, a heat-transfer-friendly material is advantageously used at the interface between the electric heating element 47 and the battery 44. The thermal connection between the battery 44 and the electric heating element 47 is thus permanent.

[0090] The third thermal branch includes a radiator 43. Preferably, the radiator 43 is located outside the passenger compartment, in particular arranged so as to be traversed by an airflow A2 when the vehicle 1 is moving and / or by activation of a fan.

[0091] The fourth thermal branch comprises:

[0092] - a circulator or a 40 pump,

[0093] - a set of electronic or electrical components 41, and

[0094] - the first condenser 12a.

[0095] The fourth secondary thermal circuit C4 may also include an expansion vessel 45.

[0096] As a consequence of the foregoing, the fourth secondary thermal circuit C4 is capable of cooperating with the second evaporator 16b and / or the first condenser 12a. The fourth secondary thermal circuit C4 thus allows for the heating and / or cooling of two assemblies. The first assembly comprises the electronic or electrical components of the power train 41 to be cooled below a temperature T1. The train 41 comprises all or part of:

[0097] - an electrical machine of the electric motor type,

[0098] - an inverter,

[0099] - a converter, in particular a DC / DC converter, and

[0100] - an electric charger.

[0101] The second set includes:

[0102] - battery 44, or

[0103] - a water / dielectric fluid heat exchanger in the case of a 44 battery cooled by a dielectric fluid,

[0104] to heat or cool within a temperature range below a temperature T2.

[0105] As schematically illustrated in Figure 3, the eight-way valve 42 comprises eight orifices or ports, identified in a clockwise direction by the references 11, 01, 02, 03, I2, 04, 05, 06. More specifically, the valve 42 comprises two inlets or admissions 11, I2, and six outlets or discharges, 01, 02, 03, 04, 05 and 06.

[0106] In a first operating mode of valve 42 (mode A) or in a first configuration of valve 42, as illustrated in Figure 3, the eight-way valve 42 is configured as follows:

[0107] - Inlet 11 is connected to outlet 01, and

[0108] - Output 02 is connected to output 03.

[0109] and / or

[0110] - Inlet I2 is connected to outlet 04 (shown in dotted lines), and

[0111] - Outlet 05 is connected to outlet 06 (shown in dotted lines). In this first operating mode (of valve 42) of the thermal system 100, which includes the eight-way valve 42, the third and fourth thermal branches are connected in series to form a loop. The radiator 43 is thermally connected in series with the first condenser 12a, the first circulator 40, and all the electronic and electrical components 41.

[0112] Optionally, in this first operating mode (of valve 42) of the thermal system 100 comprising the eight-way valve 42, the first and second thermal branches are connected in series to form a loop. The coil 44 is thermally connected in series with the second evaporator 16b and the second circulator 46.

[0113] In this first operating mode (or mode A) of valve 42, one can, in particular:

[0114] - to cool all the electronic and electrical components 41 of the vehicle 1 by means of the action of the radiator 43, or

[0115] - to cool the vehicle's passenger compartment 2 using the operation of the first primary thermodynamic circuit of the heat pump C1 (and secondary thermal circuit C2), or

[0116] - to cool battery 44 using the operation of the first primary thermodynamic circuit of heat pump C1, or

[0117] - to cool battery 44 and passenger compartment 2 through the operation of the first primary thermodynamic circuit of heat pump C1, or

[0118] - dehumidify or dry the passenger compartment 2 using the operation of the first primary thermodynamic circuit of heat pump C1, or

[0119] - to heat the passenger compartment 2 using the operation of the first primary thermodynamic circuit of the heat pump C1 and the heating element 47,

[0120] - to heat the passenger compartment 2 and cool the battery 44 through the operation of the first primary thermodynamic circuit of heat pump C1, or

[0121] - heat the battery 44 by activating the electric heating element 47, OR

[0122] - defrost the radiator 43 using the heating element 47, via the battery 44.

[0123] These various functions can be performed by activating the necessary valves and circulators. These activations and deactivations are controlled by switches and / or actuators managed by a computer.

[0124] In the second operating mode (or mode B) of valve 42 or in a second configuration of valve 42, as illustrated in Figure 4, the eight-way valve 42 is configured as follows:

[0125] - Inlet 11 is connected to outlet 05, and

[0126] - Output 04 is connected to output 03.

[0127] and / or

[0128] - Inlet I2 is connected to outlet O2 (shown with dotted lines), and

[0129] - output 01 is connected to output 06 (illustrated in dotted lines).

[0130] In this second operating mode (of valve 42) of the thermal system 100 comprising the eight-way valve 42, the second and fourth thermal branches are connected in series to form a loop. The coil 44 is thermally connected in series with the first condenser 12a, the first circulator 40, and all the electronic and electrical components 41.

[0131] Optionally, in this second operating mode (of valve 42 or) of the thermal system 100 comprising the eight-way valve 42, the first and third thermal branches are connected in series to form a loop. The second evaporator 16b is then thermally connected in series with the radiator 43, the second circulator 46, and the electric heating element 47, via the coil 44. Thus, in this second operating mode (or mode B), it is possible, in particular: - to dehumidify or dry the passenger compartment 2 thanks to the operation of the first primary thermodynamic circuit of the heat pump C1, or

[0132] - to heat passenger compartment 2 using the operation of the first primary thermodynamic circuit of heat pump C1, or

[0133] - to heat passenger compartment 2 and battery 44 using the operation of the first primary thermodynamic circuit of heat pump C1, or

[0134] - heat the battery 44 by recovering heat from all the electronic and electrical components 41, or

[0135] - heat battery 44 using the operation of the first primary thermodynamic circuit of heat pump C1, or

[0136] - heat the battery 44 by recovering heat from the passenger compartment 2 through the operation of the first primary thermodynamic circuit of the heat pump C1.

[0137] These various functions can be performed by activating the necessary valves and circulators. These activations and deactivations are controlled by switches and / or actuators managed by a computer.

[0138] Summary table of connections within the eight-way valve defining different operating modes to ensure different heating or cooling functions.

[0139] [Table 1]

[0140]

[0141] The solution reduces the complexity of hydraulic circuits, particularly through the implementation of a single eight-way hydraulic valve 42. As mentioned, this valve allows for several modes offering numerous thermo-management functions.

[0142] Summary table listing the heating or cooling functions obtained according to the modes of the eight-way valve.

[0143] [Table 2]

[0144]

[0145] As a reminder, the thermal system 100, specifically the first primary thermodynamic circuit of the heat pump C1, comprises the two condensers 12a, 12b, the two evaporators 16a, 16b, the radiator 43, and the single multi-way hydraulic valve 42. Thus, the two condensers and two evaporators allow for the independent heating and cooling, respectively, of the passenger compartment 2 and the battery 44 using simple hydraulic circuits and a limited number of "pure" modes without mixing. It should be noted that this is made possible by the presence of the two evaporators and condensers. The eight-way valve 42 alone provides all the essential thermal management functions (and a large number of ancillary thermal management functions) with a limited number of modes (specifically two), i.e., with a limited number (specifically two) of configurations of the eight-way valve.In addition, other optional heating or cooling functions can be considered, which can be achieved where appropriate by using one or more other configurations of the eight-way valve.

[0146] As a reminder, the dotted square in Figure 2 schematically illustrates the receiving enclosure 3 of the first primary thermodynamic circuit of heat pump C1 equipped with its two evaporators 16a, 16b and its two condensers 12a, 12b.

[0147] Doubling the water / coolant heat exchangers and the various valves of the refrigerant circuit allows for the simplification of the hydraulic circuits with which it is possible to cover the thermal management functions with a limited number of modes of the valve 42. Indeed, the first and second modes, modes A and B, make it possible to obtain, with a heat pump, the essential thermal management functions of the passenger compartment 2, of all the electronic and electrical components 41 and of the battery 44.

[0148] An additional mode, labeled C in the aforementioned diagrams, enables energy recovery to reduce consumption in cold and / or humid weather, for example, in winter. Connections 11-06 and I2-03 are connected to valve 42. This allows for dehumidification and drying of the passenger compartment 2. Furthermore, this mode C allows for heating the passenger compartment by recovering the heat dissipated by all the electronic and electrical components 41.

[0149] An additional mode, labeled E in the aforementioned diagrams, allows the battery 44 to be cooled by the radiator 43 for improved fuel economy in temperate climates. In this same mode E, the passenger compartment 2 can also be cooled via the air conditioning. In this mode E of the valve 42, terminals 11-01, 02-04, and 05-03 are connected.

[0150] An additional mode, designated F in the aforementioned tables, reduces heat loss from all the electronic and electrical components 41 to ensure their self-heating, or temperature increase. In this mode F, 11-03 of the valve 42 is connected. This utilizes the heat dissipated by all the electronic and electrical components 41 to further warm them up. In this mode F, I2-O4, 05-02, and 01-06 can also be connected to achieve cooling of the battery 44 by the radiator 43.

[0151] The different modes or configurations of valve 42 can be achieved by hydraulic spool valve movements controlled by one or more actuators operated by a computer. In summary, the solution focuses on a thermal architecture for an electric vehicle with a heat pump and indirect air conditioning. More specifically, vehicle 1 includes fully indirect air conditioning and heat pump systems, meaning they use secondary hydraulic loops to produce both cooling and heating. These secondary loops allow for the cooling or heating of the passenger compartment 2, the vehicle's traction and / or propulsion battery(ies) 44, and all electronic and electrical components 41. It should be noted that the adoption of indirect air conditioning and heat pump systems with secondary cooling and heating loops is particularly compatible with propane as a refrigerant.

[0152] Thanks to containment chamber 3, circuit C1 is enclosed and secure, so the high flammability of propane under standard conditions is not a problem, nor are any potential leaks within containment chamber 3. It should be noted that, ideally, the volume of propane carried in the vehicle is very small to further reduce risks. In addition, means of verifying that this quantity does not decrease can be implemented; in other words, means of detecting any potential leaks.

[0153] The presence of the eight-way valve 42, two evaporators 16a and 16b (referred to as "chillers"), and especially the presence of two condensers 12a and 12b, rather than just one, simplifies the secondary loops and therefore the hydraulic circuits (particularly C2 and C3). In other words, the presence of valve 42 coupled with a second condenser facilitates and enables numerous thermal management functions, whether for range, charging, power consumption, or thermal comfort. Indeed, although these functions involve numerous connections between the hydraulic loops, valve 42 and the second condenser make them possible. Furthermore, it becomes easy to coordinate the heating or cooling requirements of the passenger compartment 2, the battery 44, and all the electronic and electrical components 41.If necessary, the eight configurations corresponding to the heating or cooling needs of the passenger compartment, the battery, and the electrical traction and charging components can then be decoupled and separated. Thanks to this solution, energy-efficient functions become possible, namely the recovery of heat from the components to be cooled to benefit other components requiring heating, or the sharing of cooling between the battery 44 and all the electronic and electrical components 41 via the radiator 43.

[0154] One variation of the circuit is to use not a 20V accumulator, but:

[0155] - either a bottle integrated into each of the condensers,

[0156] - either a bottle common to both condensers at the junction 14.

[0157] One of the functions of the receivers is to supply liquid to the circuit at the outlet of the condensers, ideally with optimal subcooling for the system's energy efficiency. Another option is to integrate internal heat exchangers (IHX) between the hot and cold sections, typically by connecting junctions 14 and 19, for example. Internal heat exchangers improve the performance of such a system by limiting the maximum temperature and pressure of the refrigerant through heat exchange with the cooler, lower-pressure sections.

[0158] Thanks to this solution, it becomes possible to access a significant number of modes corresponding to all thermal management functions without complicating the circuits. This results in simplified design and development of these hydraulic circuits, as well as reduced associated costs. Furthermore, it eliminates the need for complex hydraulic modes, and consequently, prevents negative impacts on system performance.

[0159] In addition to simplified hydraulic circuit architectures to reduce design and development costs, the thermal system 100 is compatible with achieving a high number of heating, warming, and cooling functions for different parts or elements of an electric vehicle, while being compact, using few components, and taking into account the hazards of propane as a refrigerant.

Claims

DEMANDS 1. Thermal system (100) for temperature management of an electric vehicle (1) comprising a first primary circuit (C1) of a heat pump, the circuit (C1) comprising: - a first condenser (12a), and - a second condenser (12b), and - a first evaporator (16a), and - a second evaporator (16b), traversed by a refrigerant fluid, the thermal system (100) comprising a first secondary circuit (C4) for thermal management of a set of electronic and electrical components (41) of such an electric vehicle (1), the circuit (C4) comprising: - a first circulator (46), - the second evaporator (16b), - the first condenser (12a), - a multi-way valve, in particular an eight-way valve (42), - a radiator (43), and - a traction and / or propulsion battery (44) of such an electric vehicle (1) and an electric heating resistance (47) mounted in thermal connection, in particular in thermal connection by conduction, on the battery (44).

2. Thermal system (100) according to the preceding claim, characterized in that: - the first and second condensers (12a, 12b) are mounted in parallel, and / or - the first and second evaporators (16a, 16b) are mounted in parallel.

3. Thermal system (100) according to any one of the preceding claims, characterized in that the first primary circuit (C1) comprises: - a first expansion valve (15a) upstream of the first evaporator (16a), and - a second expansion valve (15b) upstream of the second evaporator (16b).

4. Thermal system (100) according to any one of the preceding claims, characterized in that the refrigerant is a liquefied petroleum gas or propane.

5. Thermal system (100) according to any one of the preceding claims, characterized in that the first primary circuit (C1) comprises a single compressor (10).

6. Thermal system (100) according to the preceding claim, characterized in that the first primary circuit (C1) includes a bypass valve (21) for the compressor (10).

7. Thermal system (100) according to any one of the preceding claims, characterized in that the first primary circuit (C1) comprises: - a receptacle (3), in particular a sealed or substantially sealed receptacle (3), - pipes (4) for the circulation of the refrigerant extending in particular between the condensers (12a, 12b) and the evaporators (16a, 16b), the pipes (4), the two condensers (12a, 12b) and the two evaporators (16a, 16b) being housed within the receptacle (3).

8. Thermal system (100) according to any one of the preceding claims, characterized in that it comprises: - a second secondary passenger compartment cooling circuit (C2) equipped with a first additional circulator (50), and / or - a third secondary passenger compartment heating circuit (C3) equipped with a second additional circulator (30).

9. A method for operating a thermal system (100) according to any one of the preceding claims, characterized in that the method comprises an operating mode of the thermal system (100) in which the eight-way valve (42) is configured in a first mode in which: - the radiator (43) is thermally connected in series with the first condenser (12a), a second circulator (40) and the set of electronic and electrical components (41), and / or - the battery (44) is thermally connected in series with the second evaporator (16b) and the first circulator (46).

10. A method for operating a thermal system (100) according to any one of claims 1 to 8, characterized in that the method comprises an operating mode of the thermal system (100) in which the eight-way valve (42) is configured in a second mode in which: - the battery (44) is thermally connected in series with the first condenser (12a), a second circulator (40) and the set of electronic and electrical components (41), and / or - the radiator (43) is thermally connected in series with the second evaporator (16b) and the first circulator (46).

11. Electric vehicle (1), characterized in that it comprises a thermal system (100) according to any one of claims 1 to 8.

12. Electric vehicle (1), characterized in that it comprises hardware and / or software means intended for the implementation of the method according to one of claims 9 and 10.

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