System and method for thermal management of electrical energy storage device of motor vehicle

Abstract

The invention relates to a management system and method for simultaneously performing a simplified heat treatment process on an electrical energy storage device (2) and a passenger compartment of a vehicle (1) by means of a common refrigerant circuit (101), while ensuring that the heat treatment process on the storage device (2) is simplified and scalable in order to minimize the impact on the cooled passenger compartment, and thereby ensuring an optimal comfort for a user of the vehicle (1).

Description

Technical Field

[0001] The invention relates to a system and a method for managing the thermal management of a storage device of a motor vehicle. The invention also relates to a method and a system for the thermal management of said storage device. The invention also relates to a motor vehicle equipped with said system and / or implementing said method. Background Art

[0002] Hybrid and electric vehicles are conventionally equipped with systems for cooling electrical energy storage devices that supply electrical energy to at least one element of the vehicle's electric drive train, in particular the motor. In fact, the various modules or units (also called "batteries" or "battery packs") that make up such storage devices cannot withstand large temperature variations and must therefore be effectively cooled, otherwise they could lead to premature wear and tear.

[0003] The cooling system conventionally employs a refrigerant fluid circuit associated with a ventilation, heating and / or air conditioning device of the vehicle's passenger compartment, making it possible to thermally manage the air flow directed towards the passenger compartment from the outside of the vehicle. Such a circuit thus makes it possible, on the one hand, to heat and / or cool the air flow sent to the interior of the ventilation, heating and / or air conditioning device, and, on the other hand, to provide thermal conditioning, in particular cooling, of the storage device.

[0004] Due to the dual functionality of the refrigerant fluid circuit, the cooling of the electrical energy storage device may affect the performance of the ventilation, heating and / or air conditioning equipment, and vice versa, in particular when the passenger compartment and the storage device are cooled simultaneously. This results in, among other things, relatively imprecise and suboptimal cooling operations of the electrical energy storage device and the passenger compartment, requiring priority to be given to one at the expense of the other. Summary of the invention

[0005] The present invention is proposed in this context and aims to provide a system and method for managing the thermal management of a storage device, which system and method remedies the above disadvantages. In particular, the purpose of the present invention is to provide fine control of the cooling of the storage device and the temperature of the passenger compartment in order to minimize the consumption of the storage device while optimizing the comfort of one or more passengers of the vehicle.

[0006] The invention relates to a method for managing the thermal management of an electrical energy storage device of a motor vehicle equipped with a ventilation, heating and / or air conditioning device in which a refrigerant fluid circuit comprises: at least one heat exchanger configured to exchange heat between the refrigerant fluid and an internal air flow intended to be guided into the passenger compartment; a compressor; a heat exchanger configured to exchange heat directly or indirectly between the refrigerant fluid and at least one electrical energy storage device of the vehicle; and a pressure regulating valve. The method comprises:

[0007] - a step of measuring the temperature of the electrical energy storage device by means of at least one sensor and a step of measuring the rotational state of the compressor;

[0008] - a step of determining a target temperature corresponding to a theoretical optimum temperature to be reached by the storage device;

[0009] - A step of calculating the setpoint temperature to be reached by the heat exchanger in order to bring the storage device to a determined target temperature and in order to optimize the performance of the ventilation, heating and / or air-conditioning device and / or the heat exchanger as required, the setpoint temperature of the heat exchanger being defined as a function of the difference between the target temperature of the storage device and the measured temperature and as a function of a limit temperature threshold of the heat exchanger, which limit temperature threshold is calculated based on the measured value of the storage device and the rotational state of the compressor.

[0010] The method may include the step of comparing the measured temperature of the electrical energy storage device with a predefined limit authorization temperature of the storage device, the predefined limit authorization temperature corresponding to a certain temperature, above which premature loss and damage of the storage device is detected. If the measured temperature is higher than or equal to the limit authorization temperature of the storage device, the set value temperature of the heat exchanger is not limited by the limit temperature threshold of the heat exchanger.

[0011] The method may include the steps of measuring the temperature of the at least one heat exchanger by at least one sensor and evaluating the performance level of the at least one heat exchanger. When the performance level of the at least one heat exchanger is lower than a predetermined required minimum performance level, the limit temperature threshold of the heat exchanger may be adjusted so as to be defined according to the temperature of the at least one heat exchanger.

[0012] It is noteworthy that the step of evaluating the performance level of the at least one heat exchanger may include the following sub-steps: comparing the measured temperature of the at least one heat exchanger with the calculated set point temperature of the at least one heat exchanger to be reached in order to obtain the temperature required by the users in the passenger compartment, if the measured temperature differs from the set point temperature by ±3°C or even ±2°C, the performance level may be defined as being below the required minimum performance level.

[0013] The method may include a step of comparing the measured rotational state with the maximum rotational state and / or a predefined limit rotational state of the compressor, and if the rotational state of the compressor is strictly less than the maximum rotational state and / or the limit rotational state of the compressor, the set value temperature of the heat exchanger is not limited by the limit temperature threshold of the heat exchanger.

[0014] The method may comprise the sub-step of detecting a state of the vehicle, in particular a state of at least one motor of the vehicle, and / or a driving mode adopted by the vehicle, and the sub-step of adjusting a set value temperature of the heat exchanger according to said state and / or said mode.

[0015] The invention also relates to a method for thermal management of an electrical energy storage device of a motor vehicle equipped with ventilation, heating and / or air conditioning equipment, the method comprising all the steps of the management method according to the invention and then comprising at least one step of commanding the compressor and / or regulating valve so that the heat exchanger adopts a calculated setpoint temperature.

[0016] The invention further relates to a system for thermal management of an electrical energy storage device of a motor vehicle, the system comprising hardware elements and / or software elements for executing the management method according to the invention, the hardware elements comprising at least one sensor, in particular at least one temperature sensor, and a data processor unit capable of receiving measurement results from the at least one sensor and configured to cooperate with at least one regulator device of the vehicle, the at least one regulator device being capable of controlling a regulating valve and / or a compressor.

[0017] The invention further relates to a system for thermal management of an electrical energy storage device of a vehicle, the system comprising at least one management system according to the preceding claim, and the thermal management system further comprising:

[0018] a refrigerant fluid circuit comprising: at least one first heat exchanger configured to exchange heat between the refrigerant fluid and an air flow coming from outside the vehicle; and a second heat exchanger configured to exchange heat between the refrigerant fluid and an interior air flow intended to be delivered into the passenger compartment, the circuit further comprising:

[0019] -compressor;

[0020] a heat exchanger configured to exchange heat between a refrigerant fluid and at least one electrical energy storage device of the vehicle, the heat exchanger being mounted in parallel with a second heat exchanger;

[0021] - pressure regulating valve or refrigerant fluid flow rate regulating valve;

[0022] - Regulator means configured to command the regulating valve and / or the compressor such that the heat exchanger adopts the calculated setpoint temperature.

[0023] The invention also extends to a hybrid motor vehicle or electric motor vehicle comprising at least one electrical energy storage device, in particular an electrical energy storage device capable of supplying energy to at least one element of the vehicle's electric drive train, and at least one ventilation, heating and / or air-conditioning device, the vehicle further being equipped with a management system and / or thermal management system according to the invention.

[0024] The present invention may further extend to a computer program product comprising program code instructions stored on a computer-readable medium, which are used to perform the steps of the management method according to the present invention and / or the steps of the thermal management method when the program is run on a computer. Alternatively, the present invention may also extend to a computer program product that can be downloaded from a communication network and / or stored on a computer-readable data medium and / or can be executed by a computer, the product containing instructions that, when the program is run by a computer, cause the computer to implement the method according to the present invention.

[0025] The present invention can further be extended to a computer-readable data storage medium on which a computer program is stored, the computer program comprising program code instructions for executing the method according to the present invention, or comprising instructions on a computer-readable storage medium, which instructions, when executed by a computer, cause the computer to perform at least one of the above-mentioned methods.

[0026] The invention finally relates to a signal from a data medium carrying a computer program product as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Other details, features and advantages will emerge more clearly from a reading of the following detailed description given by way of non-limiting illustration with reference to various exemplary embodiments depicted in the following drawings:

[0028] Figure 1 One embodiment of a vehicle equipped with a system for managing thermal management and a system for thermal management of an electrical energy storage device is schematically represented.

[0029] Figure 2 An embodiment of an adjustment device for equipping a vehicle is schematically shown.

[0030] Figure 3 is a block diagram of an exemplary embodiment of a method of managing thermal management and a method of thermal management of an electrical energy storage device.

[0031] Figure 4 is a diagram depicting one scenario of thermal management of a vehicle equipped with a system according to the invention.

[0032] Figure 5 is a schematic representation of an alternative embodiment of a vehicle equipped with a system for managing thermal management and a system for thermal management of an electrical energy storage device. DETAILED DESCRIPTION

[0033] Figure 1 and Figure 2 A motor vehicle 1 is schematically depicted, which is equipped with an embodiment of a thermal management system 10, in particular a cooling system, of an electrical energy storage device 2 of the vehicle 1. In particular, the vehicle 1 can be a hybrid vehicle or an electric vehicle. The vehicle 1 can be of any kind, that is, it can be a private car, a multi-purpose vehicle, a truck or a bus. The vehicle 1 can likewise be an autonomous vehicle or a non-autonomous vehicle. The electrical energy storage device 2 (also referred to as a "battery", "battery module" or "battery pack") can in particular be intended to supply energy to elements of an electric drive train of the vehicle 1, such as an electric motor, and in particular comprises at least one battery cell.

[0034] The vehicle 1 also comprises a ventilation, heating and / or air conditioning device 3 for the passenger compartment, making it possible to thermally manage the air flow directed to the passenger compartment of the vehicle 1 in order to heat or cool it.

[0035] In general, the thermal management system 10 comprises a circuit 101 for a refrigerant fluid, in particular a two-phase fluid, which is intended to perform, at a given time, thermal management of the passenger compartment of the vehicle 1 through the ventilation, heating and / or air conditioning device 3 of the passenger compartment and / or thermal management of the electrical energy storage device 2 of the vehicle 1. A "refrigerant fluid" is here understood to mean a fluid capable of performing direct or indirect thermal management of the vehicle component to be managed.

[0036] In all the following descriptions, the terms "upstream", "downstream", "inlet" and "outlet" refer to the refrigerant fluid circulation S1 in the refrigerant fluid circuit 101. Figure 1 As indicated by the arrow in .

[0037] The refrigerant fluid circuit 101 is a closed circuit 101, which includes at least one main branch 110, on which are arranged: a compressor 11, which is intended to increase the pressure of the refrigerant fluid; at least one first heat exchanger 12, which is configured to achieve heat exchange between the refrigerant fluid and an air flow FA1 from the outside to the passenger compartment; and at least one second heat exchanger 13, which is configured to thermally manage an internal air flow FA2 that is different from the air flow FA1 from the outside and is intended to be delivered to the passenger compartment of the vehicle 1.

[0038] The compressor 11 is in particular an electrically driven compressor 11. In particular, the compressor 11 is arranged between the second heat exchanger 13 and the first heat exchanger 12 so as to be arranged upstream of the first heat exchanger 12 in terms of the circulation of the cooling fluid.

[0039] The first heat exchanger 12 is configured to act as a condenser or an evaporator, depending on the operating mode of the refrigerant fluid circuit 101, that is to say in particular on whether the air conditioning mode or the heating mode is used. For example, the first heat exchanger 12 can be equipped with a bottle. Alternatively, the refrigerant fluid circuit 101 can include a bottle arranged upstream of the first heat exchanger 12, in particular so as to be arranged between the compressor 11 and the exchanger. In particular, when the ventilation, heating and / or air conditioning device 3 is to cool the passenger compartment, that is to say, when it is active in the air conditioning mode, the second heat exchanger 13 acts as an evaporator. The first heat exchanger 12 and the second heat exchanger 13 usually act opposite to each other, that is to say, when the second heat exchanger 13 acts as an evaporator, the first heat exchanger 12 acts as a condenser, and vice versa.

[0040] Therefore, the refrigerant fluid circulating in the loop 101 can be in various states. In the air conditioning mode, the refrigerant fluid enters the first heat exchanger 12 in a gaseous state, and is cooled and in a liquid state by exchanging heat with the air flow FA1 from the outside; on the contrary, the refrigerant fluid enters the second heat exchanger 13 in a two-phase state, absorbs calories from the internal air flow FA2 sent to the passenger compartment to cool the passenger compartment, and the refrigerant fluid is heated and leaves the second heat exchanger 13 in a gaseous state.

[0041] The refrigerant fluid circuit 101 further includes a secondary branch 111. The secondary branch 111 branches off from the main branch 110 at a branch point between the first heat exchanger 12 and the second heat exchanger 13 in the sense of refrigerant fluid circulation, and rejoins the same main branch 110 at a confluence point between the second heat exchanger 13 and the compressor 11.

[0042] The secondary branch 111 comprises a heat exchanger 14 which is thermally coupled to the electrical energy storage device 2 of the vehicle 1. In the case of a refrigerant fluid, the heat exchanger 14 is arranged in parallel with the second heat exchanger 13. The electrical storage device 2 is arranged in the vicinity of the heat exchanger 14 or advantageously in thermal contact with the heat exchanger in order to achieve a heat exchange between the refrigerant fluid circulating in the secondary branch 111 and said electrical storage device 2, in particular in order to cool the electrical energy storage device. According to a preferred exemplary embodiment, the heat exchanger 14 can comprise at least one plate and / or at least one flat tube in which the refrigerant fluid is intended to circulate.

[0043] according to Figure 5 In the depicted alternative embodiment, the heat exchanger 14 can be thermally coupled to an additional circuit 50 for a fluid, in particular a refrigerant fluid. The additional circuit 50 comprises a pump 52 and an additional heat exchanger 51, which is thermally coupled to the storage device 2 as described above. The additional heat exchanger 51 can be of plate or tubular type and is arranged in contact with the storage device 2 and has in particular a "cooler" function.

[0044] Independently of the embodiment used, the thermal management system 10 according to the invention may further comprise a first expansion member 15 and a solenoid valve 16 arranged upstream of the heat exchanger 14 in the sense of the circulation of the refrigerant fluid. The first expansion member 15 and the solenoid valve 16 are in particular arranged on the secondary branch 111. Specifically, the solenoid valve 16 may be arranged upstream of the first expansion member 15 in the secondary branch 111 of the refrigerant fluid circuit 101. By way of non-limiting example, the first expansion member 15 may be a thermal expansion valve or a thermostatic expansion valve (TXV).

[0045] Additionally, the refrigerant fluid circuit 101 comprises a pressure or flow rate regulating valve 17, which is arranged on the secondary branch 111 downstream of the heat exchanger 14 in the sense of the circulation of the refrigerant fluid. For example, the pressure regulating valve 17 can be of the electronic expansion type, in particular a ball valve or a needle valve, known as an electronic expansion valve (EXV). The pressure regulating valve 17 is advantageously of the variable flow type, that is to say, it enables a variable amount of the refrigerant fluid circulating in the main branch 110 of the circuit 101 to be taken out and directed to the secondary branch 111 and therefore to the heat exchanger 14, so as to be able to vary its temperature. The variable flow from the regulating valve 17 makes it possible to vary the pressure at the outlet of the heat exchanger 14 and also its temperature and therefore indirectly the temperature of the electrical energy storage device 2.

[0046] The thermal management system 10 may likewise include a second expansion member 18 disposed upstream of the second heat exchanger 13. Specifically, the second expansion member 18 is disposed between the branch point and the second heat exchanger 13. Therefore, the refrigerant fluid circulating in a first portion of the main branch 110 of the circuit 101 between the compressor 11 and the second expansion member 18 is subjected to a high pressure, while the refrigerant fluid circulating in a second portion of the main branch 110 of the circuit 101 between the second main expansion member 18 and the compressor 11 is subjected to a low pressure lower than the high pressure.

[0047] Furthermore, the thermal management system 10 comprises a system 20 for managing the thermal management of an electrical energy storage device 2. The management system 20 comprises hardware elements and / or software elements capable of executing a method 200 for managing the thermal management of an electrical energy storage device 2 as disclosed below. In particular, the hardware elements may comprise at least one sensor 21, 22, 23, in particular a temperature sensor, and a data processor unit 201 comprising at least one computer capable of receiving the measurement results performed by at least one sensor 21, 22, 23. As disclosed below, the management system preferably comprises a plurality of sensors 21, 22, 23.

[0048] In order to ensure that the cooling of the passenger compartment is optimized even when cooling of the electrical energy storage device 2 is required, the thermal management system 10 according to the invention also comprises a regulator device 30 (at Figure 2 ), the regulator device being configured to control at least the regulating valve 17 and / or the compressor 11 as a function of the measurement results from some or all of said sensors 21, 22, 23, in particular to make the heat exchanger 14 adopt a calculated setpoint temperature in order to enable cooling suitable for the storage device 2, as disclosed below. In other words, the processor unit 201 is capable of receiving measurement results from one or more sensors 21, 22, 23 and is configured to collaborate with the regulator device 30, in particular in order to transmit to the regulator device data and / or commands to be executed at the level of the regulating valve 17 and / or the compressor 11. In particular, the regulator device 30 is configured to command at least one degree or level of opening of the regulating valve 17 to supply refrigerant fluid to the secondary branch 111 and therefore to the heat exchanger 14, and / or to command the state of the compressor 11 (in other words, the flow rate of the refrigerant fluid in the circuit 101). By way of non-limiting example, the regulator device 30 may be partially comprised in the processor unit 201.

[0049] The regulator device 30 comprises a plurality of regulator devices 300, each of which can act at least on the compressor 11 and / or the regulating valve 17. Specifically, such a regulator device 300 can be a proportional-integral (PI) or proportional-integral-derivative (PID) controller.

[0050] The regulator device 30 and / or the thermal management system 10 and / or the processor unit 201 may optionally include at least one comparator 350, which is capable of comparing measured values ​​(in particular measured values ​​of temperature) with calculated values ​​and / or predetermined values ​​stored in one or more memory units (not represented) of the vehicle 1.

[0051] The present invention also relates to a method 200 for managing the thermal management of an electrical energy storage device 2 on the one hand, and to a method 100 for managing the thermal management of said storage device 2 on the other hand. Figure 3The management method 200 according to the invention can likewise be considered as a method of operating or using a system 20 for managing the thermal management of a storage device 2 as disclosed above. Alternatively, this method can be considered as a method of operating or using a vehicle 1 equipped with such a management system 20 and a ventilation, heating and / or air conditioning device 3 and, according to an exemplary embodiment, equipped with a refrigerant fluid circuit 101, as disclosed above.

[0052] In general, the management method 200 comprises a step E1 of measuring the temperature T of the electrical energy storage device 2 by means of at least one sensor. batt_m In the depicted example, the first sensor 21 detects the energy storage device 2T batt Temperature T batt_m At least one measurement is performed. By way of non-limiting example, such a measurement may be the average of the temperatures measured by measuring the surface temperature of the cells of the storage device 2 by means of a plurality of thermistors. These measurements are then transmitted to the processor unit 201 as disclosed above. Such measurements may be performed simultaneously or one after the other.

[0053] The method also comprises, simultaneously or successively with the step E1 of measuring the temperature of the storage device 2 , a step E6 of measuring the rotation state R of the compressor 11 comp_m The purpose of such measurements is in particular to assess the magnitude of the thermal power that can be allocated for accurate thermal management of the electrical energy storage device 2, depending on the cooling power available at the scale of the refrigerant fluid circuit 101. Such measurements can be performed, for example, in real time or at regular time intervals.

[0054] Based on the measurement results obtained in this way, the processor unit 201 then performs a step E2 of determining a target temperature T corresponding to the optimal theoretical temperature to be reached by the electrical energy storage device 2. batt_target .

[0055] Then, the processor unit 201 executes step E3: calculating the temperature required to keep the storage device 2 at the determined target temperature T batt_target The set value temperature T that the heat exchanger 14 is to reach Exch_target , while optimizing the performance of the ventilation, heating and / or air conditioning device 3 and / or the heat exchanger 14 as required. In other words, the processor unit 201 then calculates the temperature required to cool the storage device 2 to a predetermined target temperature T batt_target The required cooling power at the level of the heat exchanger 14. The setpoint temperature T of the heat exchanger 14 Exch_target is based on the target temperature T of the storage device 2 batt_target With the measured temperature T batt_m The setpoint temperature T of the heat exchanger 14 is defined by the difference betweenExch_target Likewise, according to the limit temperature threshold T of the heat exchanger 14 Exch_target min The limit temperature threshold is defined according to the measured value T of the storage device. batt_m and the rotation state R of the compressor 11 comp_m Calculated. The limit temperature threshold T of the heat exchanger 14 Exch_target min Corresponds to a minimum temperature below which the temperature of the heat exchanger 14 cannot drop in order not to undesirably affect the thermal management of the passenger compartment. Exch_target min is the set value temperature T of the heat exchanger 14 Exch_target The purpose of the limitation is to limit the cooling power required at the level of the heat exchanger 14 in order to cool the storage device 2, in other words to slow down the thermal management of said device in order to limit the observed impact on the thermal management of the passenger compartment. The target temperature of the storage device 2 thus remains exactly the same, independently of the performance required in the passenger compartment, but the time required to reach said target temperature is prolonged due to the limitation imposed.

[0056] The limit temperature threshold T of the heat exchanger 14 Exch_target min The rotation state R of the compressor 11 is thus variable and depends on the conditions of use of the vehicle. comp_m In particular, it is possible to assess whether the vehicle is in a phase in which the thermal management performance of the passenger compartment has priority. batt_m This enables definition of whether its temperature is acceptable (as disclosed in more detail below), the degree of thermal management necessary, and whether the measured temperature is susceptible to being violated.

[0057] For example, under so-called “normal” operating conditions of the ventilation, heating and / or air conditioning device 3 , the limit temperature threshold T Exch_target min "Normal conditions" are those conditions that do not represent extreme loads on the device 3, do not require the compressor 11 to operate at high, extreme or limit conditions (as disclosed in more detail below), and / or can achieve the needs of thermal management of the passenger compartment without affecting the thermal management function of the storage device 2. The set value temperature T applied to the heat exchanger 14 Exch_target The limit is less constrained, and the setpoint temperature T Exch_target A lower value may be assumed, since under such conditions the heavy load of cooling power for the thermal management of the storage device 2 is less likely to negatively affect the thermal management of the passenger compartment. By way of non-limiting example, the limit temperature threshold T Exch_target min Then it may be about 15° C. For a set of situations representing “normal conditions” as explained above, the limit temperature threshold T Exch_target min May optionally be fixed and correspond to the minimum value of the authorization threshold.

[0058] On the contrary, if, in particular, the rotation state R of the compressor 11 comp_m It is detected that the ventilation, heating and / or air conditioning device 3 is heavily loaded to perform considerable thermal management of the passenger compartment, for example in the case of a vehicle parked in the sun at high external temperatures, then the limit temperature threshold T Exch_target min The value of can be more restrictive and higher. This value can be varied as required and can be determined, for example, with the aid of a linearization table T Exch_target =f(T Batt_m ) according to the target temperature T of the storage device 2 batt_target With the measured temperature T batt_m For example, if this difference is small, then the limit temperature threshold T is greater than if the difference is large (that is, in the case where the storage device 2 is highly heated, in this case, the limit temperature threshold T is greater than if the storage device 2 is highly heated). Exch_target min can have a lower value, such as close to 15°C or 20°C) compared to the limit temperature threshold T Exch_target min It may have a higher value, for example a value of about 35° C. It should be understood that the target temperature T of the storage device 2 batt_target With the measured temperature T batt_m The definition of a “small” or “large” difference between the two may be defined based on the knowledge of a person skilled in the art and / or may be predefined by the manufacturer or a technician working on the vehicle.

[0059] For example, when using the method according to the invention, a setpoint temperature T of the heat exchanger 14 to be used Exch_target First, the measured value T of the storage device can be batt_m to be defined, and if it is detected that such a setpoint temperature is strictly less than the limit temperature threshold T of the heat exchanger 14 calculated simultaneously or subsequently Exch_target min , then the set value temperature T of the heat exchanger 14 Exch_target is adjusted to be limited by the threshold value, that is to say to be equal to the threshold value. Alternatively, it is possible to directly define the setpoint temperature T of the heat exchanger 14 to be used Exch_target , so as to set the limit temperature threshold T of the heat exchanger 14 as disclosed above Exch_target min Take it into consideration.

[0060] According to the alternative formula mutatis mutandis applicable to step E3 disclosed above, in calculating the setpoint temperature T of the heat exchanger Exch_target This limiting temperature threshold T of the heat exchanger 14 is used during step E3 Exch_target min Indirectly, this temperature is similar to limiting the temperature to a temperature gradient ΔT Exch_batt The temperature gradient ΔT varies according to the vehicle's operating conditions. Exch_batt Corresponding to the measured temperature T of the electrical energy storage device 2 batt_mThe set value temperature T to be reached by the heat exchanger 14 Exch_target In fact, conventionally, the temperature gradient ΔT Exch_batt The steeper the slope, the more abrupt the cooling applied to the storage device 2. More problems are then encountered, which are related to the unevenness of the cooling of the storage device 2 (especially between the surface in contact with the heat exchanger and the surface further away), resulting in premature loss of the storage device. In addition, the thermal management system 10 then requires more cooling power to facilitate the thermal management of the storage device 2, rather than to facilitate the thermal management of the passenger compartment.

[0061] Optionally but preferably, the method may in particular comprise a step E21 of measuring the temperature T of the electrical energy storage device 2 batt_m The predefined limit authorization temperature T of the storage device 2 Batt_lim By comparison, the predefined limit authorization temperature corresponds to a temperature above which premature wear and tear of the storage device 2 is recorded. The setpoint temperature T of the heat exchanger 14 can then be determined based on the result of this comparison. Exch_target The maximum temperature threshold of the heat exchanger is T Exch_target min Limit. If the measured temperature T Batt_m Greater than or equal to the limit authorization temperature T of the storage device 2 Batt_lim , then the set value temperature T of the heat exchanger 14 Exch_target Especially not affected by the extreme temperature threshold T Exch_target min limit.

[0062] The processor unit 201 and / or the regulator device 30 (eg at least one of the comparators 350 ) may perform a step E21 of converting the measured temperature T of the electrical energy storage device 2 to batt_m With predefined limit authorized temperature T batt_lim For example, the limit authorized temperature T Batt_lim It may be predefined by the manufacturer or fixed by any system of the vehicle capable of cooperating with the storage device 2 , in particular in order to limit or interrupt its operation in the event of overheating. Batt_lim It may be greater than 50°C, such as about 50°C to 55°C, especially about 53°C or 54°C.

[0063] Alternatively or additionally, the comparison step E21 may include the following sub-steps: comparing the measured temperature T batt_m The acceptable operating temperature range T of the storage device Batt_ok By comparison, this range corresponds to the authorized operating temperature range of the storage device without heating the storage device or with its permissible heating. batt_mWithin this acceptable temperature range, the heat exchanger setpoint temperature T is applied. Exch_target The limit temperature threshold T of the heat exchanger 14 Exch_target_min The acceptable temperature within the range is strictly lower than the limit authorized temperature T of the storage device 2. Batt_lim For example, the acceptable temperature range T Batt_ok This can be approximately 40° C. to 50° C., that is to say, for example, for the storage device 2 , below 40° C. defective performance is recorded and above 55° C. damage is observed.

[0064] As a result, only when the heating of the storage device 2 is judged to be extreme (e.g., it will inevitably lead to irreversible damage), the thermal management power can be mainly dedicated to the electrical energy storage device 2, thereby compromising the user's comfort and the thermal management of the passenger compartment. In this case, without taking into account the limit temperature threshold T of the heat exchanger 14 Exch_target_min Calculate the set point temperature T of the heat exchanger when Exch_target , and the set point temperature T of the heat exchanger can be further reduced Exch_target , that is, below the limit temperature threshold T Exch_target_min , in order to correct said heating of the electrical energy storage device 2. In other words, then only according to the measured temperature T of the storage device 2 batt_m To calculate the set point temperature T of the heat exchanger Exch_target This produces a temperature gradient ΔT that is unrestricted and greater than that disclosed above. Exch_batt , the temperature gradient may for example rise to an excursion strictly greater than 15° C., or even 20° C. or again 30° C.

[0065] On the contrary, if the measured temperature T of the energy storage device 2 is detected batt_m Not seriously increased, that is, it is strictly less than the limit authorized temperature T Batt_lim , for example, it is acceptable for its operation, then as described above, the limit temperature threshold T is applied Exch_target_min Limit the set value temperature T of the heat exchanger 14 Exch_target As a result, the thermal management of the electrical energy storage device 2 is limited and, by extension, the temperature gradient ΔT Exch_batt The same restrictions apply in order to prioritize the thermal management of the passenger compartment over the thermal management of the electrical energy storage device 2. In this case, the observed temperature gradient ΔT Exch_batt It may for example be strictly less than 10° C., for example approximately 5° C., in order to adopt a moderate thermal management of the storage device 2 without affecting the comfort of the passenger compartment.

[0066] The management method 200 according to the invention thus advantageously makes it possible to adapt the cooling power required at the level of the storage device 2 so as to require only the temperature of said device to be lowered to the target temperature Tbatt_target The required power. This results in slower and more uniform aging of the storage device 2, since the required cooling power is adapted according to the requirements and rough and intense cooling operations are rarely repeated and are limited to extreme heating situations. Likewise, the conventionally observed impact on the ventilation, heating and / or air conditioning device 3 is reduced compared to conventional thermal management methods that function according to the all-or-nothing principle (that is, an on / off system that requires high cooling power in order to respond to extreme heating of the storage device 2).

[0067] In fact, thermal management systems can conventionally function according to an all-or-nothing or “on / off” principle, in which cooling of the storage device 2 can be completely omitted as long as the storage device 2 does not exceed a predetermined temperature, after which an intense and sudden cooling of the storage device (that is to say, with a high temperature gradient) is triggered, thereby compromising the thermal management of the passenger compartment. As mentioned above, such a principle is accompanied by premature loss of the storage device and discomfort to the user. The management method and system according to the invention, on the contrary, make it possible to define a set value temperature of the heat exchanger that is more sophisticated, capable of evolution and adapted to the circumstances relating to the thermal management of the electrical energy storage device 2 and to the passenger compartment. Thus, when the heating of the storage device 2 is judged to be acceptable and not prone to causing damage, the cooling of the thermal management device is more gradual and more uniform, while abrupt cooling (that is to say, without limiting the reduction in the temperature of the heat exchanger 14 and therefore without limiting the temperature gradient ΔT Exch_batt ) is only implemented in extremely necessary cases, for example, if the temperature T batt_m This causes a conventional on-board safety system of the vehicle to block or limit the functions of the vehicle in order to protect the storage device 2 .

[0068] According to the present invention, the set point temperature T of the heat exchanger 14 is Exch_target , the limit temperature threshold T of the heat exchanger 14 Exch_target min and the observed temperature gradient ΔT Exch_batt It is therefore advantageously defined to be able to evolve according to the conditions relating to the passenger compartment and the electrical energy storage device 2, as described above. "Evolvable" means updated or defined in real time or at predefined time intervals (e.g. for each calculation time step) according to the measurement results received by the processor unit 201.

[0069] According to an alternative operating mode of the management method 200 according to the invention, it is possible to improve the management method so as to take into account the thermal management of the passenger compartment more accurately and thus to define the setpoint temperature T of the heat exchanger 14 more accurately. Exch_target In this sense, the method may further comprise measuring the temperature T of at least one heat exchanger, in particular a heat exchanger for heat exchange with the air flow delivered to the passenger compartment. HEX_mThen, the limit temperature threshold T of the heat exchanger 14 can be adjusted in step E52. Exch_target_min , so that when the performance level of the at least one heat exchanger 13 is below a predetermined required minimum performance level, the at least one heat exchanger 13 is heated according to the temperature T HEX_m To limit.

[0070] In this case, the heat exchanger under consideration is the second heat exchanger 13 which participates in the thermal management of the interior air flow FA2 sent to the passenger compartment and acts as an evaporator in the ventilation, heating and / or air conditioning device 3. The temperature T of the second heat exchanger 13 HEX_m It can be measured, for example, by a second sensor 23 which in particular measures the temperature of the air leaving the exchanger or by measuring the surface temperature of the exchanger, for example by a sensor arranged on the fins of the exchanger.

[0071] For example, the step E5 of evaluating the performance level of the second heat exchanger 13 may be implemented by the processor unit 201 and / or the comparator 350, which converts the measured temperature T of the second heat exchanger 13 into HEX_m The second heat exchanger 13 must be used in order to obtain the temperature T desired by the user in the passenger compartment. hab The set value temperature T HEX_target In other words, the method may include a sub-step E51: comparing the measured temperature T of the second heat exchanger 13 HEX_m With the set value temperature T HEX_target For comparison, the setpoint temperature is calculated by the management system or by any system associated with the ventilation, heating and / or air conditioning device 3 in the vehicle and / or stored in a memory unit.

[0072] By way of non-limiting example, at least a portion of step E5 may be combined with step E1 of measurement and / or step E21 of comparison and / or determination of a target temperature T of storage device 2. batt_target The performance level may be defined as a percentage or alternatively according to a binary system in which the performance level of the second heat exchanger 13 is considered to be achieved or not achieved. HEX_m The performance level of the second heat exchanger can, for example, be defined as being below a required minimum performance level if the measured temperature T HEX_m With a difference of ±3°C, even ±2°C, even ±1.5°C or again ±1°C from the set point temperature, the performance level may be considered acceptable.

[0073] The management method 200 thus makes it possible to adapt the operation of the thermal management system 10 so as to give higher priority to cooling the passenger compartment when the performance of the second heat exchanger 13 is judged to be below a prerequisite performance threshold, without completely interrupting the thermal management of the electrical energy storage device 2. This principle may in particular have the effect of identifying data related to the situation in the passenger compartment (in particular the measured rotational state R of the compressor 11). comp_m ) function. For example, this situation can be observed when starting a vehicle, especially when the ambient temperature outside the vehicle is high. As disclosed above, according to the measured temperature T HEX_m The setpoint temperature T of the heat exchanger Exch_target The limitation can be carried out by the processor unit 201 and makes it possible to impose limitations on the cooling power required at the level of the heat exchanger 14 for thermal management of the energy storage device 2 when the situation requires, in particular if the thermal management performance of the passenger compartment is susceptible to being affected and / or if the cooling power required for thermal management of the passenger compartment is high.

[0074] For example, the limit temperature threshold T Exch_target_min It may be defined as a function of a limiting operating temperature value of the second heat exchanger 13, such as a minimum operating temperature intended to prevent the risk of icing of the second heat exchanger 13. Without limiting the invention, such a minimum operating temperature may be about 3°C.

[0075] According to a specific embodiment, in order to improve the evaluation of the operating conditions of the vehicle with respect to the thermal management of the passenger compartment, as disclosed above, the method according to the invention may optionally comprise a step E61 of converting the measured rotational state R comp_m With the maximum rotation state of the compressor R comp_max and / or a predefined limit rotation state R specified by, for example, the manufacturer comp_lim Thus, by "maximum state" is meant the highest rotational state that the compressor 11 in question can adopt, and by "limit state" is meant the highest state authorized by the vehicle 1 or any system of the vehicle 1 that can cooperate with said compressor 11 (for example due to heating or noise generated by the compressor). comp_lim Strictly less than the maximum rotation state R comp_max .

[0076] The method can then be configured such that if the rotation state R of the compressor 11 comp_m Strictly less than the maximum rotation state R of the compressor comp_max and / or extreme rotation state R comp_lim , then the set value temperature T of the heat exchanger 14 Exch_target Not subject to the limiting temperature threshold T of the heat exchanger 14 Exch_target minLimitation. This situation can be observed in particular in the case of "normal" use of the ventilation, heating and / or air conditioning device 3 as described above. In other words, in this case, if it is detected that the compressor is not running at maximum performance and the setpoint temperature T to be reached by the heat exchanger 14 Exch_target Only according to the target temperature T of the storage device 2 batt_target With the measured temperature T batt_m The difference between the two values ​​is defined, then the limit temperature threshold T of the heat exchanger 14 can be increased. Exch_target min The limit T imposed Exch_target min Therefore, the rotation state R of the compressor 11 comp_m indicates whether cooling power at the level of thermal management of the passenger compartment is required and may further enable the magnitude of such a requirement to be determined. The setpoint temperature T of the heat exchanger 14 Exch_target Therefore, we can use the linearization table T Exch_target =f(T Batt_m ) to determine, these linearization tables are defined as the target temperature T of the storage device 2 batt_target With the measured temperature T batt_m These linearization tables are different, depending on the rotation state R of the compressor 11. comp_m Whether it is judged as “normal” or “high”, that is, here, for example, it depends on the rotation state R of the compressor 11 comp_m Is it strictly below the maximum rotation state R of the compressor? comp_max and / or extreme rotation state R comp_lim Or depending on the rotation state R of the compressor 11 comp_m Is it higher than or equal to the maximum rotation state R of the compressor? comp_max and / or extreme rotation state R comp_lim。 Similar principles may be applied mutatis mutandis to the predetermined rotational state value ranges representing different situations in which the compressor 11 functions, in particular the "normal" or "high" rotational state as described above.

[0077] In fact, the performance of the heat exchanger that performs the thermal management of the passenger compartment, in this case the second heat exchanger 14, can be conventionally adjusted by varying the rotational state of the compressor 11 included in the refrigerant fluid circuit 101, being able to increase the rotational state in particular when the cooling power required at the level of said heat exchanger is insufficient. As a result, it is not necessary to limit the setpoint temperature T of the heat exchanger 14, if it is noted that the cooling power can still be allocated to the thermal management of the passenger compartment by adjusting the state of the compressor 11. Exch_target In order to reduce the magnitude of the cooling power employed at the level of the storage device 2. In other words, if the measured rotational state R of the compressor comp_m Strictly below the maximum rotation state R of the compressor comp_max and / or extreme rotation state Rcomp_lim , then, if necessary, supplementary cooling power can be supplied to the heat exchanger 14.

[0078] This principle is extended to the resulting temperature gradient ΔT Exch_batt , so that if the measured rotational state of the compressor R comp_m Strictly less than the maximum rotation state R comp_max and / or its extreme rotation state R comp_lim , then the observed temperature gradient ΔT Exch_batt Not limited and may include high temperatures as disclosed above, for example greater than 10°C, even 20°C or again 30°C, which corresponds to a high cooling power at the level of the storage device 2, since the refrigerant fluid circuit is able to supply supplementary cooling power to the second heat exchanger 13 for thermal management of the passenger compartment with the aid of the compressor 11, if necessary.

[0079] According to another option, the management method may be configured to define a setpoint temperature T of the heat exchanger 14 as a function of the driving mode and / or as a function of the state of at least one motor of the vehicle 1 . Exch_target The driving modes are, for example, conventional driving modes of the "comfort", "normal" or "sport" type. The state of the at least one motor may relate in particular to its operation or its stoppage, or to a so-called "power latch" situation corresponding to a period of time that passes between switching off the ignition and switching off the computer of the vehicle 1 , during which thermal management of the passenger compartment is no longer necessary and only thermal management of the storage device 2 is applied.

[0080] In the case of this option, the management method 200 according to the invention may then comprise a step E7 of detecting the state of at least one motor of the vehicle 1 and / or the driving mode adopted by the vehicle 1 , followed by adjusting the setpoint temperature T of the heat exchanger 14 according to data relating to this state and / or mode. Exch_target Sub-step E71.

[0081] The invention also extends to a method 100 for thermal management of an electrical energy storage device 2 of a vehicle 1. This method comprises the steps of the management method 200 as disclosed above, followed by at least one step E8 of controlling the compressor 11 and / or the regulating valve 17 so that the heat exchanger 14 adopts the calculated setpoint temperature T Exch_target During the control step, the regulator device 30 is in particular able to control and thus modify, as required, the rotational state of the compressor 11 and / or the level or degree of opening of the regulating valve 17 .

[0082] The control step E8 may then first comprise a sub-step E81 of calculating a setpoint rotation state value R of the compressor 11 comp_target and / or the set value opening level or degree of the regulating valve 17valve_target , so that the heat exchanger 14 reaches the desired set value temperature T Exch_target For example, open level or degree O valve_target It can be defined as a percentage of the maximum opening capacity of the regulating valve 17. A similar principle can be extended to the target temperature T of the second heat exchanger 13. HEX_target , in order to define the set value rotation state R to be adopted by the compressor 11 comp_target According to a non-limiting example, the set value rotation state R of the compressor 11 comp_target The desired setpoint temperature T of the heat exchanger 13 can be controlled by means of a proportional-integral controller 44 based on the desired setpoint temperature T HEX_target With the measured temperature T HEX_m Similarly, the setting value opening degree O of the regulating valve 17 is determined by calculating the difference between valve_target The proportional-integral controller 44 can then be used based on the setpoint temperature T of the heat exchanger 14 Exch_target The temperature of the heat exchanger 14 is determined by calculation of the difference between the measured temperature of the heat exchanger 14 (enabling thermal management of the electrical energy storage device 2 ).

[0083] During the transmission sub-step E82, the processor unit 201 then sets the setpoint rotation state value R of the compressor 11 to be used. comp_target and / or the setting value opening degree O of the regulating valve 17 valve_target The regulator device 30 is transmitted, which commands the compressor 11 and / or the regulating valve 17 to apply such values.

[0084] The thermal management method 100 may optionally be executed so as to be able to measure, simultaneously with its execution, the rotational state R of the compressor 11 adopted by the thermal management system 10, for example in real time or at predetermined time intervals, as the method is being executed. comp_m and / or the opening degree O of the regulating valve 17 valve_m For example, such data may be received by the processor unit 201 which then performs the calculations disclosed above and then converts the measured rotational state R of the compressor 11 into comp_m and / or the measured opening degree O of the regulating valve 17 valve_m The calculated value R used before transmitting the command to the regulator device 30 comp_target , O valve_target The comparison is made and, unless these values ​​differ, no command to be executed is transmitted to the compressor 11 and / or the regulating valve.

[0085] Therefore, a vehicle 1 equipped with a management system 20 and / or thermal management system 10 as disclosed above (that is, a vehicle 1 capable of executing the management and / or thermal management method according to the present invention) can execute one of the examples of the various operating modes described above at a given time.

[0086] In the first operating mode, it is necessary to provide cooling of the passenger compartment and the electrical energy storage device 2 simultaneously. The setpoint temperature T to be used by the heat exchanger 14 is calculated using the management method 200 according to the invention. Exch_target A first regulator device 301 included in the plurality of regulator devices 300 of the regulator apparatus 30 may control the regulating valve 17 to adjust its degree of opening, and / or a second regulator device 302 included in the same plurality of regulator devices 300 may adjust the rotation state of the compressor 11 as required so that the heat exchanger 14 reaches such a set value temperature.

[0087] In the second operating mode, when the compressor 11 is at the maximum of its capacity, that is to say when it is at its maximum rotation state R comp_max Or the limit rotation state R comp_lim If the temperature of the passenger compartment is not what the user wants, that is to say the second heat exchanger 13 is not performing at the required level, priority is given to cooling the passenger compartment. The thermal management of the storage device 2 is maintained at a low level and the setpoint temperature T to be reached by the heat exchanger 14 Exch_target The limit temperature threshold T of the heat exchanger 14 Exch_target min The limit temperature threshold is as described above based on the measured value T of the storage device. batt_m and the rotation state R of the compressor 11 comp_m The observed temperature gradient ΔT is calculated. Exch_batt The cooling power allocated to the heat exchanger 14 is then adjusted by adjusting the opening degree of the regulating valve 17. The third regulator device 303 included in the plurality of regulator devices 300 can adjust the opening degree of the regulating valve 17. valve_target , so that most of the cooling power remains in the main branch 110 of the circuit 101 and is therefore dedicated to the thermal management of the passenger compartment. The temperature of the storage device 2 can then be changed to a more appropriate value according to the measured difference between the threshold temperature and the measured temperature, while continuing to assign priority to cooling the passenger compartment. Exch_target min and therefore the setpoint temperature T of the heat exchanger 14 Exch_target And the resulting gradient can in particular evolve as desired. It is worth noting that the more the electrical storage device 2 is heated, that is to say the closer it is to the limit authorization temperature T Batt_lim , the more intense the cooling of the energy storage device will be. In other words, the temperature of the heat exchanger 14 is then reduced in order to be able to achieve greater cooling. The limit temperature threshold T can then be reduced Exch_target min , in order to achieve a larger temperature gradient.

[0088] In the third operating mode, if the temperature of the energy storage device 2 continues to rise above the limit authorization temperature T Batt_lim , for example above 53° C. or 54° C., restrictions are increased and thermal management of the storage device 2 is prioritized.

[0089] When the compressor 11 is below its maximum state R comp_max or its limit state R comp_lim The fourth operating mode applies when the heat exchanger 14 is operated in the state of . As disclosed above, the cooling power is still available for thermal management, and the set value temperature T of the heat exchanger 14 can be increased. Exch_target in order to apply the necessary thermal management at the level of the electrical energy storage device 2. The resulting observed temperature gradient Δ Exch_batt The temperature of the storage device 2 is then not limited and can be high, for example strictly greater than 10° C., even 20° C. or again 30° C., in particular about 35° C. Priority continues to be assigned to the management of the passenger compartment in order to maintain the comfort of the user, but the thermal management of the storage device 2 is adapted by increasing the imposed limitations. The rotational state of the compressor 11 is below the maximum state or the limit state, the refrigerant fluid circuit has a reserve cooling power available, and its limitations can then be withdrawn. The regulator device 30 can then adjust the temperature of the second heat exchanger 13 by modifying the rotational state of the compressor 11 and / or the temperature of the heat exchanger 14 by modifying the rotational state of the compressor 11 and / or modifying the degree of opening of the regulating valve 17.

[0090] Figure 4 An example of the operation of a vehicle according to the invention in a cooling situation is depicted. The depicted curves represent in particular the evolution of the setpoint temperature and the measured temperature at the level of the heat exchanger 14, the storage device 2 and the second heat exchanger. Furthermore, these curves depict the measured temperature gradient Δ Exch_batt , and the opening degree of the regulating valve 17 measured in real time O valve_m .

[0091] At start-up and in the first few minutes of driving, the cooling demand is essentially or even entirely focused on the thermal management of the passenger compartment and, therefore, on cooling the second heat exchanger. The state of the compressor (not shown) can then be at a maximum. If the measured temperature T Batt_m If a predetermined threshold is exceeded (corresponding to a heating requirement for thermal management), the cooling power demand of the storage device 2 increases. However, for a period of up to about 15 minutes, the performance of the second heat exchanger 13 is below the required level, here because the measured temperature T HEX_m Well above the setpoint temperature T of the second exchanger required to produce the required cooling in the passenger compartment HEX_target, so the cooling power allocated to the heat exchanger 14 is limited. In the depicted example, the setpoint temperature T of the heat exchanger 14 to be achieved Exch_target This limitation leads to a temperature gradient Δ Exch_batt is also limited, in particular to 15° C. after 10 minutes. In order to apply this limitation, the degree of opening of the regulating valve can be gradually adjusted so that the measured temperature T of the heat exchanger Exch_m Slowly approaches the calculated target temperature T that it must reach Exch_target If the measured temperature T of the storage device 2 batt_m Greater than or equal to the limit authorization temperature T of the storage device 2 Batt_lim (here for example fixed at 51° C.), then the setpoint temperature T of the heat exchanger 14 to be reached is increased. Exch_target The limitation of the temperature gradient Δ Exch_batt In the example depicted, this overheating is clearly observed between 6 and 11 minutes or between 17 and 22 minutes. Exch_batt The temperature T of the heat exchanger 14 is much steeper and may include temperatures greater than 20° C., or even 25° C., depending on the temperature required in order to concentrate the cooling power on the electrical energy storage device 2 . Exch_target (not shown) and thus the temperature gradient Δ Exch_batt By means of the opening degree O imposed on the regulating valve 17 valve_target To adjust the battery temperature T Batt_m The higher the authorized temperature gradient Δ Exch_batt Conversely, once the thermal management of the storage device 2 causes it to measure the temperature T Batt_m If the temperature of the vehicle can be returned to its acceptable temperature range (here 40° C. to 50° C.), the cooling power can be focused again on the thermal management of the passenger compartment and the degree of opening of the regulating valve 17 is adjusted. valve_target Can be reduced.

[0092] After about fifteen minutes, the second heat exchanger 13 is at a temperature close to or even equal to its target temperature T HEX_target Temperature T HEX_m , in other words, to provide an appropriate performance level. The rotational state of the compressor can then be reduced to a value below its maximum rotational state or its limit rotational state.

[0093] Therefore, the system and method according to the present invention simultaneously achieves fine thermal management of the electrical energy storage device and the passenger compartment of the vehicle by providing fine control with the help of a common refrigerant fluid circuit. The fine control provided can evolve the thermal management of the storage device so as to minimize the impact on cooling the passenger compartment and thereby ensure optimal comfort for the passenger users.

[0094] However, the present invention should not be considered limited to the devices and configurations described and depicted herein, and equally extends to any equivalent devices or configurations and any technically operable combination of such devices, to the extent that they ultimately achieve the functions described and depicted in this document.

Claims

1. A method (200) for managing the thermal management of an electrical energy storage device (2) of a motor vehicle (1), the motor vehicle being equipped with a ventilation, heating and / or air conditioning device (3), in which a refrigerant fluid circuit (101) comprises: at least one heat exchanger (13) configured to exchange heat between the refrigerant fluid and an interior air flow (FA2) intended to be guided into the passenger compartment; a compressor (11); a heat exchanger (14) configured to directly or indirectly exchange heat between the refrigerant fluid and at least one electrical energy storage device (2) of the vehicle (1); and a pressure regulating valve (17), the method comprising: - measuring the temperature (T of the electrical energy storage device (2) by means of at least one sensor (21) batt_m ) step (E1) and measuring the rotation state (R) of the compressor (11) comp_m ) step (E6); - Determine a target temperature (T) corresponding to the theoretical optimal temperature to be reached by the storage device (2); batt_target ) of step (E2); - Calculate the setpoint temperature (T Exch_target ) so that the storage device (2) is at the determined target temperature (T batt_target ) and in order to optimize the performance of the ventilation, heating and / or air conditioning device (3) and / or the heat exchanger (14) as required, step (E3), the set point temperature (T Exch_target ) is defined as the target temperature (T batt_target ) and the measured temperature (T batt_m ) and the limit temperature threshold value (T Exch_targetmin ), the limit temperature threshold is based on the measured value (T batt_m ) and the rotation state (R comp_m ) calculated.

2. The management method (200) according to the preceding claim, comprising measuring the temperature (T batt_m ) and the predefined limit authorization temperature (T Batt_lim ) is compared with the step (E21), the predefined limit authorization temperature corresponds to a certain temperature, above which the storage device (2) is found to be prematurely worn out and damaged, if the measured temperature (T batt_m ) is higher than or equal to the maximum authorized temperature (T Batt_lim ), then the set value temperature (T Exch_target ) is not subject to the limiting temperature threshold (T Exch_targetmin )limit.

3. The management method (200) according to one of the preceding claims, comprising measuring the temperature (T HEX_m ) and a step (E5) of evaluating the performance level of the at least one heat exchanger (13), and when the performance level of the at least one heat exchanger (13) is lower than a predetermined required minimum performance level, adjusting (step E52) the limit temperature threshold (T Exch_targetmin ) so as to adjust the temperature (T HEX_m ) to limit.

4. The management method (200) according to the preceding claim, wherein: The step (E5) of evaluating the performance level of the at least one heat exchanger (13) comprises a sub-step (E51): measuring the temperature (T HEX_m ) and the temperature required by the user in the passenger compartment (T hab ) is a calculated setpoint temperature (T HEX_target ) is compared, if the measured temperature (T HEX_m ) and the set temperature (T HEX_target ) value differs by ±3°C or even ±2°C, the performance level is defined as being below the required minimum performance level.

5. The management method (200) according to any one of the preceding claims, comprising: comp_m ) and the maximum rotation state of the compressor (R comp_max ) and / or predefined limit rotation state (R comp_lim ) is compared, if the rotation state (R comp_m ) is strictly less than the maximum rotation state of the compressor (R comp_max ) and / or the extreme rotation state (R comp_lim ), then the set value temperature (T Exch_target ) is not subject to the limiting temperature threshold (T Exch_targetmin )limit.

6. A management method (200) according to any one of the preceding claims, comprising a sub-step (E7) of detecting the state of the vehicle, in particular the state of at least one motor of the vehicle, and / or the driving mode adopted by the vehicle, and adjusting the setpoint temperature (T Exch_target ) sub-step (E71).

7. A method (100) for thermal management of an electrical energy storage device (2) of a motor vehicle (1) equipped with a ventilation, heating and / or air conditioning device (3), comprising all the steps of the management method (200) as claimed in any one of the preceding claims, and then comprising commanding the compressor (11) and / or the regulating valve (17) so that the heat exchanger adopts the calculated setpoint temperature (T Exch_target ) at least one step (E8).

8. A system (20) for managing the thermal management of an electrical energy storage device (2) of a motor vehicle (1), the system comprising hardware elements and / or software elements for executing a management method as claimed in any one of claims 1 to 6, the hardware elements comprising at least one sensor (21, 22, 23), in particular at least one temperature sensor, and a data processor unit (201), which is capable of receiving measurement results from the at least one sensor (21, 22, 23) and is configured to cooperate with at least one regulator device (30) of the vehicle, the at least one regulator device being capable of controlling the regulating valve (17) and / or the compressor (11).

9. A system (10) for thermal management of an electrical energy storage device (2) of a vehicle, comprising at least one management system (20) according to the preceding claim, and further comprising: - a refrigerant fluid circuit (101) comprising: at least one first heat exchanger (12) configured to perform a heat exchange between the refrigerant fluid and an air flow (FA1) from outside the vehicle; and a second heat exchanger (13) configured to perform a heat exchange between the refrigerant fluid and an interior air flow (FA2) intended to be delivered to the passenger compartment, the circuit (101) further comprising: - compressor (11); a heat exchanger (14) configured to exchange heat between the refrigerant fluid and at least one electrical energy storage device (2) of the vehicle, the heat exchanger (14) being mounted in parallel with the second heat exchanger (13); - a pressure regulating valve (17) or a refrigerant fluid flow rate regulating valve; - a regulator device (30) configured to command the regulating valve (17) and / or the compressor (11) so that the heat exchanger (14) adopts the calculated setpoint temperature (T Exch_target ).

10. A hybrid motor vehicle or electric motor vehicle (1), comprising at least one electrical energy storage device (2), in particular an electrical energy storage device (2) capable of supplying energy to at least one element of the vehicle's electric drive system, and at least one ventilation, heating and / or air-conditioning device (3), the vehicle further being equipped with a management system (20) as claimed in claim 8 and / or a thermal management system (10) as claimed in the preceding claim.

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