MONITORING THE TEMPERATURE OF THE AREA WHERE A CHARGEABLE BATTERY VEHICLE IS PARKED

Abstract

A monitoring method is implemented in a geolocatable vehicle comprising a rechargeable battery and a self-contained thermal preconditioning device which, if activated, warms the battery. This method includes a step (10-90) in which, if the vehicle is geolocated while stationary in an area where the temperature may be below a predefined threshold, at least one message is generated for the vehicle's driver recommending that the thermal preconditioning device be activated. Figure 3

Description

Title of the invention: MONITORING THE TEMPERATURE OF THE AREA WHERE A RECHARGEABLE BATTERY VEHICLE IS PARKED Technical field of the invention

[0001] The invention relates to vehicles comprising a rechargeable battery and capable of being heated by a thermal pre-conditioning device, and more specifically to the monitoring within such vehicles of temperatures of areas in which they are stopped. State of the art

[0002] Some vehicles, possibly of the automobile type, include a rechargeable battery which is notably responsible for supplying electrical energy to at least one electric drive machine of their powertrain (or powertrain), and therefore constitutes a power battery (or main or traction battery).

[0003] When the vehicle is stationary, this type of rechargeable battery generally tends to discharge spontaneously when its internal temperature falls below a "high" threshold (typically -10°C), or even to deteriorate when its internal temperature falls below a "low" threshold strictly lower than the high threshold (typically -30°C). This is particularly true of so-called cellular batteries, since they include electrical energy storage cells, possibly electrochemical (for example, lithium-ion (or Li-ion), Ni-MH, or Ni-Cd).

[0004] The longer the vehicle is at rest and unused, the lower the state of charge of its battery will be in the presence of an internal temperature below the upper threshold, and therefore the more the vehicle's mileage range will be reduced (or even zero) when its driver wants to use it again.

[0005] Similarly, the longer the period during which the vehicle is stopped and unused, the greater the degradation of its battery will be in the presence of an internal temperature below the low threshold, and therefore the more the life of this battery will be reduced.

[0006] In order to limit both the discharge and degradation of their battery, some vehicles are equipped with a thermal preconditioning device designed to warm their battery, for example, when its internal temperature falls below a certain threshold. This preconditioning device uses the electrical energy stored in the battery (associated with the electric motor), which results in increased energy consumption at rest and therefore a reduction in the vehicle's driving range. The colder the outside temperature, the more the device The preconditioning system is likely to operate frequently, and therefore the more it will drain the battery. However, for this thermal preconditioning system to function, it must first be activated by the vehicle's driver. Many drivers forget to activate it when they leave their vehicle.

[0007] The invention therefore aims in particular to improve the situation. Presentation of the invention

[0008] In particular, it proposes for this purpose a monitoring method intended to be implemented in a geolocatable vehicle and comprising a rechargeable battery and a thermal preconditioning device capable, in the event of activation, of warming up this battery.

[0009] This monitoring method is characterized by the fact that it includes a step in which, in the event of geolocation of the vehicle stopped in an area where the temperature may be below a first predefined threshold, at least one message is generated for a driver of the vehicle recommending that the thermal preconditioning device be activated.

[0010] Thanks to the invention, it is now possible to remind the driver that his vehicle is equipped with a thermal pre-conditioning device which must be activated in order to function and thus limit the spontaneous discharge of the battery and its degradation.

[0011] The monitoring method according to the invention may include other features which may be taken separately or in combination, and in particular:

[0012] - in its stage, when the thermal preconditioning device includes a first operating mode consisting of automatically warming the battery as soon as its internal temperature falls below a second predefined threshold, and a second operating mode consisting of warming the battery on the driver's command as soon as its internal temperature falls below a third predefined threshold strictly lower than the second threshold, a message can be generated recommending the activation of the thermal preconditioning device in the first or second operating mode;

[0013] - in its stage, when the driver is still in the vehicle, it is possible to generate a text message and this text message can be displayed on at least one screen present in the vehicle, and / or an audio message can be generated and this audio message can be broadcast using at least one speaker present in the vehicle;

[0014] - in its stage, when the vehicle is locked without a passenger, it is possible to generate a text message and this text message can be transmitted to the driver's mobile communication device so that it is displayed on a screen of that mobile communication equipment, and / or a text message can be generated and this text message can be transmitted to this mobile communication equipment so that it can be broadcast by means of a speaker of the mobile communication equipment;

[0015] - in its step, the area in which the vehicle is located can be geolocated. stopped, then we can determine if this geolocated area can have a temperature below the first predefined threshold, and, if so, we can generate each message in the vehicle;

[0016] - alternatively, in its stage, when the vehicle includes a module of communication via radio waves, it is possible to geolocate in the vehicle the area in which it is stopped, then it is possible to transmit to a server information representative of this geolocated area, then it is possible to determine with this server if this geolocated area can have a temperature lower than the first predefined threshold, and, if so, each message can be generated in this server, then each generated message can be transmitted to a mobile communication equipment of the driver and / or to the vehicle;

[0017] - in its step, it is possible to determine whether the geolocated area can have a temperature below the first threshold by comparing to the latter a current temperature outside the vehicle or by searching in a meteorological database if temperatures are going to be below the first threshold in the geolocated area.

[0018] The invention also proposes a computer program product comprising a set of instructions which, when executed by processing means, is suitable for implementing a monitoring method of the type presented above, in a geolocatable vehicle and comprising a rechargeable battery and a thermal preconditioning device suitable, in case of activation, for warming this battery, in order to monitor an outside temperature in an area where the vehicle is stopped.

[0019] The invention also proposes a monitoring device intended to equip a geolocatable vehicle and comprising a rechargeable battery and a thermal preconditioning device which, in the event of activation, warms up this battery.

[0020] This monitoring device is characterized by the fact that it includes at least one processor and at least one memory arranged to perform the operations consisting, in the event of geolocation of the vehicle stopped in an area where the temperature may be below a first predefined threshold, of triggering the generation, for a driver of the vehicle, of at least one message recommending the activation of the thermal preconditioning device.

[0021] The invention also proposes a vehicle, possibly of the automobile type, that can be geolocated and comprises, on the one hand, a rechargeable battery and a device for proper thermal preconditioning, in case of activation, to warm this battery, and, on the other hand, a monitoring device of the type presented above. Brief description of the figures

[0022] Other features and advantages of the invention will become apparent from an examination of the detailed description below, and the accompanying drawings, in which:

[0023] [Fig. 1] schematically and functionally illustrates an example of the realization of a vehicle comprising a monitoring device according to the invention and a powertrain with an electric drive unit associated with a rechargeable power battery and associated with a battery control unit,

[0024] [Fig.2] schematically and functionally illustrates an example of an embodiment of a battery calculator including an example of an embodiment of a monitoring device according to the invention, and

[0025] [Fig.3] schematically illustrates an example of an algorithm implementing an monitoring method according to the invention. Detailed description of the invention

[0026] The invention aims in particular to provide a monitoring method, and an associated DS monitoring device, intended to enable monitoring of the outside temperature in an area where a vehicle V is stopped, comprising a rechargeable BP battery, suitable for supplying electrical energy to at least one electric drive machine MME of a powertrain (or GMP), and to which a thermal pre-conditioning device DP is coupled.

[0027] In what follows, vehicle V is considered, by way of non-limiting example, to be of the automobile type. For example, it is a car, as illustrated in [Fig. 1]. However, the invention is not limited to this type of vehicle. It relates to any type of vehicle comprising a rechargeable battery, capable of supplying electrical energy to at least one electric drive unit of the powertrain, and to which a thermal pre-conditioning device is coupled. Thus, it relates to land vehicles (commercial vehicles, motorhomes, minibuses, coaches, trucks, motorcycles, road maintenance vehicles, construction equipment, agricultural machinery, recreational vehicles (snowmobiles, go-karts), tracked vehicles, trains and trams, for example), aircraft, and boats.

[0028] Furthermore, in what follows, by way of non-limiting example, vehicle V is considered to comprise a powertrain (or PWM) of the all-electric type (and therefore whose propulsion is provided exclusively by at least one electric motor). However, the PWM could be of the hybrid type (thermal and electric).

[0029] A vehicle V (here a land vehicle) comprising a DS monitoring device according to the invention and a purely electric GMP transmission chain (and therefore comprising (here) a single electric motor machine MME), an on-board network RB, a service battery BS, a power (or main or traction) battery BP, to which is coupled a thermal pre-conditioning device DP, a CV converter, and a CS supervisory computer.

[0030] The CV converter is of the DC / DC type (“Direct Current / Direct Current”). It is therefore responsible for converting a direct current from a first voltage to a second voltage.

[0031] The RB on-board network is an electrical power supply network to which electrical (or electronic) equipment (or components) that consume electrical energy are coupled.

[0032] The auxiliary battery BS is responsible for supplying electrical power to the vehicle's electrical system RB, supplementing, in this case, that supplied by the inverter CV, which is powered by the main battery BP via a power supply network, and sometimes replacing, in this case, the inverter CV. For example, this auxiliary battery BS can be configured as a very low voltage type battery (typically 12 V, 24 V, or 48 V). It is rechargeable at least by the inverter (current) CV. In the following, by way of non-limiting example, the auxiliary battery BS is considered to be a 12 V lithium-ion type.

[0033] The transmission chain has a GMP which is, here, purely electric and therefore includes, in particular, an electric drive machine MME, a drive shaft AM, and a transmission shaft AT.

[0034] Here, "electric drive machine" means an electric machine arranged to provide a motor torque, defined by a torque setpoint, to move the vehicle V when it is supplied with electrical energy by the power battery BP, and possibly to recover regenerative braking torque to decelerate the vehicle V.

[0035] The operation of the GMP is supervised by a supervisory computer CS. The control of the electric motor machine MME is ensured by a machine computer CM, in particular according to a setpoint provided by the supervisory computer CS and defining the motor torque that the latter (CS) wants the electric motor machine MME to provide.

[0036] The electric drive machine MME is coupled to the motor shaft AM to provide it with motor torque by rotational drive when it is supplied with electrical energy from the power battery BP via the power grid. This motor shaft AM is here coupled to a gearbox RD which is also coupled to the shaft of AT transmission, itself coupled to a first Tl set of drive wheels via a DV differential.

[0037] It should be noted that the first train Tl (here, the motor) is located in the front PVV section of the vehicle V, and is therefore referred to hereafter as the front train. However, in a variant, this first train Tl could be the second train T2, which is located in the rear PRV section of the vehicle V.

[0038] The BP power battery may, for example, comprise electrical energy storage cells, possibly electrochemical (e.g., lithium-ion (or Li-ion) or Ni-MH or Ni-Cd type). Also, for example, the BP power battery may be of the low-voltage type (typically 450 V or 600 V, by way of illustration). But it could also be of the medium-voltage or high-voltage type.

[0039] Furthermore, the BP power battery is associated with a BB battery housing which includes, in particular, measuring means (not shown), for example for voltage, current and internal temperature, and a CB battery calculator. This CB battery calculator centralizes the current measurements, voltage measurements and temperature measurements, and estimates parameters of the BP power battery based on these measurements.

[0040] The thermal preconditioning device DP is coupled to the power battery BP and, when activated by the driver of vehicle V, is designed to heat the latter (BP). It may, for example, include at least one resistive element that converts electrical current into heat. It should be noted that this thermal preconditioning device DP may be dedicated to heating the power battery BP, or it may ensure not only the heating of the power battery BP but also the heating of the passenger compartment of vehicle V during each phase of thermal preconditioning.

[0041] The CV converter is also responsible, here, during the driving phases of the vehicle V, for converting part of the electrical current stored in the power battery BP to supply converted electrical current to the on-board network RB and the auxiliary battery BS (to recharge it).

[0042] It will be noted, as illustrated non-limitingly in [Fig. 1], that the CV converter can be part of a CH charger responsible for controlling the charging of the BP power battery.

[0043] It should also be noted that in the example illustrated, but not limited to, in [Fig. 1], the vehicle V also includes a distribution box BD to which the auxiliary battery BS, the converter CV, and the on-board network RB are coupled. This distribution box BD is responsible for distributing the electrical energy stored in the auxiliary battery BS or produced by the converter CV into the on-board network RB to power the electrical components (or equipment) connected to the on-board network. RB depending on power requests received (notably from the CS supervision computer of the GMP).

[0044] As mentioned above, the invention proposes in particular a monitoring method intended to allow monitoring of the outside temperature in the area where the vehicle V is stopped.

[0045] This (monitoring) method can be implemented at least partially by the DS monitoring device (illustrated at least partially in Figures 1 and 2), which for this purpose comprises at least one PR1 processor, for example a digital signal processor (or DSP), and at least one MD memory. This DS monitoring device can therefore be implemented as a combination of electrical or electronic circuits or components (or "hardware") and software modules (or "software"). For example, it could be a microcontroller.

[0046] The MD memory is random access memory (RAM) to store instructions for the implementation by the PR1 processor of at least part of the monitoring process. The PR1 processor may comprise integrated (or printed) circuits, or several integrated (or printed) circuits connected by wired or wireless connections. An integrated (or printed) circuit is defined as any type of device capable of performing at least one electrical or electronic operation.

[0047] In the example illustrated, but not limited to, in Figures 1 and 2, the DS monitoring device is part of the CB battery control unit. However, this is not mandatory. Indeed, the DS monitoring device could comprise its own dedicated control unit, which is then coupled to the CB battery control unit, or it could be part of a control unit embedded in the vehicle V and performing at least one other function, for example.

[0048] As illustrated non-limitingly in [Fig.3], the (monitoring) method according to the invention includes a step 10-90 which is implemented each time the vehicle V comes to a stop (engine off) in an area.

[0049] Step 10-90 of the method includes a substep 40 in which, in the event of geolocation of the vehicle V at rest in an area where the temperature may be below a first threshold if predefined, a message is generated (for example the DS monitoring device triggers the generation), for the driver, at least one message recommending the activation of the thermal preconditioning device DP.

[0050] Thus, the driver is reminded that their vehicle V is equipped with a DP thermal preconditioning device which must be activated (possibly remotely via a vehicle function remote control application installed in the driver's ECM mobile communication equipment) in order to operate. It will be understood that the occasional heating of the battery BP power is intended to limit its spontaneous discharge when its internal temperature falls below a second predefined threshold s2 to limit the loss of mileage range, and to limit its degradation when its internal temperature falls below a third predefined threshold s3 strictly lower than the second threshold s2 to avoid a reduction in its lifespan.

[0051] Once the driver is informed, it is up to them to decide whether or not to activate the DP thermal preconditioning device, particularly depending on the duration of their vehicle V's stop in the geolocated area. This activation is then carried out either via a human-machine interface of the vehicle V (when the driver is present in the vehicle (V)), or with an application on their ECM mobile communication equipment (when the driver is away from the vehicle V).

[0052] The term “EMC mobile communication equipment” herein means electronic equipment capable of communicating by means of radio waves via at least one wireless communication network and comprising a display screen EA2 and at least one loudspeaker. For example, it could be a smart phone (or “smartphone”) or an electronic tablet.

[0053] For example, the first threshold si can be between -3°C and -15°C. As an illustrative example, the first threshold si can be equal to -7°C. However, other values ​​for the first threshold si can be used. For example, this first threshold si can be chosen during the development or testing phase of a vehicle similar to vehicle V or a battery with a power output similar to the BP power battery.

[0054] Also, for example, the second threshold s2 can be between -5°C and -15°C. As an illustrative example, the second threshold s2 can be equal to -10°C. But other values ​​for the second threshold s2 can be used. For example, this second threshold s2 can be chosen during the development or testing phase of a vehicle similar to vehicle V or of a battery with a power output similar to the BP power battery.

[0055] Also, for example, the third threshold s3 can be between -25°C and -35°C. As an illustrative example, the third threshold s3 can be equal to -30°C. But other values ​​for the third threshold s3 can be used. For example, this third threshold s3 can be chosen during the development or testing phase of a vehicle similar to vehicle V or of a battery with a power output similar to the BP power battery.

[0056] It should be noted that the DP thermal preconditioning device may, for example, include:

[0057] - a first mode of operation which consists of automatically heating the battery power BP as soon as its internal temperature (BP) falls below the second threshold s2, and

[0058] - a second mode of operation which consists of heating the battery of BP power on driver's command as soon as the internal temperature of the latter (BP) becomes less than the third threshold s3 (strictly less than the second threshold s2).

[0059] It should be noted that the first operating mode only requires simple activation by the driver, while the second operating mode requires the driver to program operating periods or times.

[0060] When the thermal preconditioning device DP includes these first and second modes of operation, in substep 40 of step 10-90 a message can be generated (for example the DS monitoring device can trigger the generation of a) recommending that the thermal preconditioning device DP be activated in the first mode of operation or in the second mode of operation.

[0061] By way of purely illustrative example, the (each) message may be of the type "Risk of very cold outside temperature. We recommend that you activate the thermal preconditioning to warm up the power battery when its internal temperature is below the second threshold s2 or the third threshold s3".

[0062] However, the DP thermal preconditioning device could comprise only one operating mode, such as the first or second operating mode described above. In this case, by way of purely illustrative example, the (each) message could be of the type "Risk of very cold outside temperature. We recommend that you activate thermal preconditioning to warm the power battery when its internal temperature is below the second s2 or third s3 threshold."

[0063] It should be noted that if the driver decides to activate the DP thermal preconditioning device in the second operating mode, the latter (DP) will only be activated each time the internal temperature of the power battery falls below the third threshold s3 (and not as soon as it falls below the second threshold s2). This advantageously allows for a significant reduction in the electrical energy consumption of the DP thermal preconditioning device, and therefore the discharge of the power battery BP, during the vehicle V's immobilization period.

[0064] Also, for example, in substep 40 of step 10-90, a text message and / or an audio message can be generated (for example, the DS monitoring device can trigger the generation) to inform the driver. In this case, two situations can occur.

[0065] When the driver is still in vehicle V, the text message (for example, the DS monitoring device can trigger the display of the text message) can be displayed on at least one screen in vehicle V, and / or the audio message can be played through at least one speaker in vehicle V. The display This can be done in substep 60 of step 10-90 on at least one EA1 screen of vehicle V (e.g., the instrument panel or a central instrument cluster) or on the EA2 screen of the driver's ECM mobile communication equipment (e.g., their smartphone). Similarly, sound playback can be done in substep 60 of step 10-90 using at least one speaker of vehicle V or the driver's ECM mobile communication equipment.

[0066] When the vehicle V is locked without a passenger inside its passenger compartment, in a substep 70 of step 10-90 the text message can be transmitted (for example, the DS monitoring device can trigger the transmission of the) to the driver's ECM mobile communication equipment so that it is displayed on its screen EA2 in a substep 80 of step 10-90, and / or in this substep 70 the audio message can be transmitted (for example, the DS monitoring device can trigger the transmission of the) to this ECM mobile communication equipment so that it is broadcast by means of a loudspeaker of the latter (ECM) in substep 80. To ensure this transmission, an MC wave communication module on board the vehicle V can, for example, be used.

[0067] It should be noted, as illustrated (though not exhaustively) in [Fig. 3], that step 10-90 may also include a substep 50 in which it is possible (for example, the DS monitoring device) to determine whether the driver is still in vehicle V or whether vehicle V is locked without a passenger inside. For example, this determination can be made using the vehicle V's on-board computer, as it centralizes information, including information relating to the presence of passenger(s) in the passenger compartment and the central locking of the doors and windows. It will be understood that if the result of the determination carried out in substep 50 indicates that the driver is still in vehicle V, substep 60 is performed, whereas if the result of the determination carried out in substep 50 indicates that vehicle V is locked without a passenger inside, substeps 70 and 80 are performed.

[0068] Also, for example, and as illustrated, but not limited to, in [Fig. 3], step 10-90 may also include a substep 10 in which the area in which the vehicle V is stopped can be geolocated. For example, to determine this area, an on-board geolocation device (using, for example, information provided by satellites) can be operated. In this case, in this substep 10, the monitoring device DS can determine the geolocated area from this geolocation device (by activating it on request).

[0069] Also, for example, and as illustrated non-limitingly in [Fig. 3], step 10-90 may also include a substep 20 in which it is determined whether the area geolocated in substep 10 can have a temperature below the first threshold. This determination can be made in at least two ways.

[0070] One method involves determining the temperature outside the vehicle V, which is measured, for example, by an on-board sensor or one known to a server (containing, or having access to, a meteorological database). This server must then be queried using the MC radio wave communication module by providing it with the geographical position of the geolocated area. Then, in a substep 30 of step 10-90, the system (for example, the DS monitoring device) can determine whether the determined outside temperature is below the first threshold. If the outside temperature is greater than or equal to the first threshold (and therefore negative), the process ends in a substep 90. Conversely, if the outside temperature is below the first threshold (and therefore positive), substep 40 is performed to generate the message (for each) intended for the driver.

[0071] A second method consists of establishing communication with a server (containing, or having access to, a meteorological database) using the MC wave communication module, in order to transmit to it information representative of the geolocated area (such as its geographical position). Then, in substep 30 of step 10-90, it is possible to determine with the server whether the geolocated area can have an outside temperature below the first threshold. If not, the process ends in substep 90. Conversely, if so, substep 40 is carried out to generate the (each) message intended for the driver. It should be noted that in substep 30 the server can begin by determining either the current outside temperature in the geolocated area, or the N minimum outside temperatures forecast for the next N days in the geolocated area.Each determination can optionally be made based on historical weather information for the current month and / or day and / or the hemisphere in which the geographical area is located. For example, N can be between 3 and 10 days. In the first alternative, the server can determine if the predicted outside temperature is below the first threshold. If the outside temperature is greater than or equal to the first threshold (and therefore negative), the process ends in substep 90. Conversely, if the outside temperature is below the first threshold (and therefore positive), substep 40 is performed to generate the message for each driver. In the second alternative, in substep 30, the server can determine if the N predicted minimum outside temperatures are below the first threshold.If all the predicted minimum outside temperatures are greater than or equal to the first threshold (and therefore negative), the process ends in substep 90. Conversely, if at least one of the predicted minimum outside temperatures is less than the first threshold (and therefore affirmative), substep 40 is carried out to generate the (each) message intended for the driver. In the first and second alternatives, substep 40 can be carried out either in the server (and in this case the (each) generated message is transmitted to the ECM mobile communication equipment of the driver of vehicle V and / or to vehicle V), or in vehicle V (and in this case the server must notify the MC wave communication module that the outside temperature may be below the first threshold if or vice versa).

[0072] It should be noted that, when the server has to perform the comparisons at the first threshold si and / or generate the messages intended for the driver, part of the DS monitoring device is installed in this server.

[0073] In one embodiment, the server can provide the MC wave communication module with the minimum outdoor temperatures forecast for the next N days. For example, N could be between 3 and 10 days. Then, in substep 30 of step 10-90, a system (for example, the DS monitoring device) can determine whether the forecast and provided minimum outdoor temperatures are below the first threshold. If all the forecast and provided minimum outdoor temperatures are greater than or equal to the first threshold (and therefore negative), the process terminates in substep 90. Conversely, if at least one of the forecast and provided minimum outdoor temperatures is below the first threshold (and therefore positive), substep 40 is performed to generate the message (for each) intended for the driver.

[0074] It will also be noted, as illustrated non-limitingly in [Fig.2], that the CB battery calculator (or the DS monitoring device calculator) may also include a mass memory MM1, in particular to store the measured outside temperature or the N minimum expected outside temperatures, and information representative of the geolocated area, as well as any intermediate data involved in all its calculations and processing.Furthermore, this CB battery calculator (or the DS monitoring device calculator) may also include an IE input interface for receiving the measured outside temperature or the N minimum predicted outside temperatures, information representative of the geolocated area, and possible information indicating that the outside temperature may be below the first threshold s1 or the opposite, for use in calculations or processing, possibly after having shaped and / or demodulated and / or amplified them, in a way known per se, by means of a PR2 digital signal processor.In addition, this CB battery calculator (or the DS monitoring device calculator) may also include an IS output interface, notably to deliver a message (or command) containing the (each) generated message, and a possible message containing information representative of the geolocated area and possibly requiring the determination of whether. the geolocated area may have an outside temperature below the first threshold s 1 or the provision of the current outside temperature in the geolocated area or the N minimum outside temperatures forecast in the geolocated area.

[0075] It will also be noted that the invention also proposes a computer program product (or computer program) comprising a set of instructions which, when executed by processing means of the type of electronic circuits (or hardware), such as for example the PR1 processor, is suitable for implementing the monitoring process described above to monitor the outside temperature in the area where the vehicle V is stopped.

Claims

Demands

1. A method for monitoring a geolocatable vehicle (V) comprising a rechargeable battery (BP) and a thermal preconditioning device (DP) capable, when activated, of warming said battery (BP), characterized in that it comprises a step (10-90) in which, when said vehicle (V) is geolocated while stationary in an area where the temperature may be below a first predefined threshold, at least one message is generated for a driver of said vehicle (V) recommending the activation of said thermal preconditioning device (DP).

2. The method according to claim 1, characterized in that in said step (10-90), when said thermal preconditioning device (DP) comprises i) a first mode of operation consisting of automatically heating said battery (BP) as soon as an internal temperature of the latter (BP) becomes less than a second predefined threshold, and ii) a second mode of operation consisting of heating said battery (BP) on order of said driver as soon as said internal temperature of the latter (BP) becomes less than a third predefined threshold strictly less than said second threshold, a message is generated recommending the activation of said thermal preconditioning device (DP) in said first or second mode of operation.

3. Method according to claim 1 or 2, characterized in that in said step (10-90), when said driver is still in said vehicle (V), a text message is generated and this text message is displayed on at least one screen present in said vehicle (V), and / or an audio message is generated and this audio message is broadcast by means of at least one loudspeaker present in said vehicle (V).

4. A method according to claim 1 or 2, characterized in that in said step (10-90), when said vehicle (V) is locked without a passenger, a text message is generated and transmitted to a mobile communication equipment (MCE) of said driver so that it may be displayed on a screen of said mobile communication equipment (MCE), and / or a text message is generated and transmitted to said mobile communication equipment (MCE) so that it may be broadcast by means of a loudspeaker of said mobile communication equipment (MCE).

5. A method according to any one of claims 1 to 4, characterized in that in said step (10-90) said area in which it is stopped is geolocated in said vehicle (V), then it is determined whether said geolocated area can have a temperature below said first predefined threshold, and, if so, each message is generated in said vehicle (V).

6. A method according to any one of claims 1 to 4, characterized in that in said step (10-90), when said vehicle (V) includes a wave communication module (MC), the area in which it is stopped is geolocated in said vehicle (V), then information representative of said geolocated area is transmitted to a server, then it is determined with said server whether said geolocated area can have a temperature below said first predefined threshold, and, if so, each message is generated in this server, then each generated message is transmitted to a mobile communication equipment (MCE) of said driver and / or said vehicle (V).

7. A method according to any one of claims 1 to 6, characterized in that in said step (10-90) it is determined whether said geolocated area can have a temperature below said first threshold by comparing to the latter a current temperature outside said vehicle (V) or by searching in a meteorological database whether temperatures will be below said first threshold in said geolocated area.

8. Product computer program comprising a set of instructions which, when executed by processing means, is suitable for implementing the monitoring method according to any one of claims 1 to 7, in a geolocatable vehicle (V) comprising a rechargeable battery (BP) and a thermal preconditioning device (DP) suitable, when activated, for heating said battery (BP), to monitor an outside temperature in an area where said vehicle (V) is stopped.

9. A monitoring device (DS) for a geolocatable vehicle (V) comprising a rechargeable battery (BP) and a thermal preconditioning device (DP) capable, when activated, of warming said battery (BP), characterized in that it comprises at least one processor (PR1) and at least one memory (MD) arranged to perform the operations consisting, in the event of geolocation said vehicle (V) stationary in an area where the temperature may be below a first predefined threshold, to trigger the generation, for a driver of said vehicle (V), of at least one message recommending the activation of said thermal preconditioning device (DP).

10. A geolocatable vehicle (V) comprising a rechargeable battery (BP) and a thermal preconditioning device (DP) capable, when activated, of warming said battery (BP), characterized in that it further comprises a monitoring device (DS) according to claim 9.