MANAGEMENT OF THE OPENING / CLOSING OF A MOTORIZED OPENING OF A SLEEPING VEHICLE

Abstract

A management method is implemented in a vehicle comprising a powertrain and an on-board network supplied with electrical energy by a rechargeable service battery and supplying an electric mechanism for opening / closing an opening. This method comprises a step (10-20) in which, in the event of receiving a request to use the electric mechanism while the powertrain is asleep, a duration during which the service battery can supply the electric mechanism with electrical energy is determined based on an estimate of the state of charge of the service battery, a quantity of electrical energy necessary for the operation of the electric mechanism and a quantity of electrical energy necessary for starting the powertrain, and then this use is authorized for this determined duration. Fig. 3

Description

Title of the invention: MANAGEMENT OF THE OPENING / CLOSING OF A MOTORIZED OPENING OF A SLEEPING VEHICLE Technical field of the invention

[0001] The invention relates to vehicles comprising an on-board network supplied with electrical energy by a power supply unit comprising at least one rechargeable service battery, and more precisely the management of the supply of electrical energy by this service battery to an electric mechanism for opening / closing an opening panel. State of the art

[0002] As is known to those skilled in the art, certain vehicles comprise an on-board network supplied with electrical energy by a power supply unit comprising a rechargeable service battery, and possibly an electrical energy generator. For example, this electrical energy generator may be an alternator or an alternator-starter when the vehicle comprises a powertrain (or GMP) comprising at least one thermal motor, or a current converter associated with a main battery of low, medium or high voltage type, when the GMP comprises at least one electric motor.

[0003] In the following and the above, the term "service battery" means a battery rechargeable by at least one electrical energy generator and of the very low voltage type (typically 12 V, 24 V or 48 V).

[0004] Furthermore, in the following and the preceding, the term "on-board network" means an electrical power supply network to which electrical (or electronic) equipment (or components) consuming electrical energy are coupled.

[0005] When the vehicle's GMP is in operation and the power supply unit comprises an electrical energy generator and a rechargeable auxiliary battery, it is the electrical energy generator (associated with the main battery) which is responsible for supplying power to the on-board network. When the vehicle's GMP is asleep and the possible electrical energy generator is not temporarily coupled to an external electrical power source for recharging the associated main battery, it is the auxiliary battery which must supply all of the electrical energy to the on-board network, in particular to put the GMP into operation.

[0006] In certain vehicles at least one of the openings (generally the rear trunk) is coupled to an electric opening / closing mechanism which can be actuated not only when the GMP is in operation but also when the GMP is asleep. In this latter situation, it is the service battery that must provide the electrical energy necessary for the operation of the electric opening / closing mechanism (via the on-board network). However, when the vehicle has not been used for a long time or has fallen asleep with its service battery having a low state of charge, it may happen that the use of the electric opening / closing mechanism causes an (additional) discharge of the service battery which makes it unable to provide sufficient electrical energy to start the powertrain.

[0007] It has certainly been proposed in patent document US-B2 10,180,025 to determine the internal temperature of the service battery and the voltage at the terminals of the service battery in the event of receiving a request to use the electric opening / closing mechanism while the GMP is asleep, in order to check whether the service battery is capable of powering this electric opening / closing mechanism. But this does not make it possible to know whether the service battery will be capable of providing sufficient electrical energy for starting the GMP after having powered the electric opening / closing mechanism when the voltage at its terminals has been considered sufficient taking into account its internal temperature, and therefore after this power supply it may prove impossible to start the GMP.

[0008] The invention therefore aims in particular to improve the situation. Presentation of the invention

[0009] For this purpose, it proposes in particular a management method intended to be implemented in a vehicle comprising a powertrain and an on-board network supplied with electrical energy by a rechargeable service battery and supplying an electric mechanism for opening / closing an opening panel.

[0010] This management method is characterized by the fact that it comprises a step in which, in the event of receiving a request to use the electric mechanism while the powertrain is asleep,

[0011] - we determine, as a function of an estimate of a state of charge of the battery of servitude, of a quantity of electrical energy necessary for the operation of the electric mechanism and of a quantity of electrical energy necessary for the operation of the powertrain, a duration during which the service battery can supply electrical energy to the electric mechanism, then

[0012] - this use is authorized for this determined period.

[0013] Thanks to the invention, it is now known before each use of the electrical mechanism whether this risks causing a discharge of the service battery such as to render it incapable of providing sufficient electrical energy for the next start of the GMP.

[0014] The management method according to the invention may include other characteristics which may be taken separately or in combination, and in particular:

[0015] - in its step one can authorize the use during the determined duration when the latter is greater than a first chosen threshold;

[0016] - in its step one can determine the estimation of the state of charge as a function of a initial state of charge when the vehicle was last put to sleep and an estimate of the quantity of electrical energy lost by the service battery since this last sleep;

[0017] - in its step one can determine the duration and / or the quantity of electrical energy born necessary for the operation of the powertrain according to a current temperature of the service battery;

[0018] - in its stage, when the powertrain has operated for a duration greater than or equal to a second threshold before falling asleep, use can be authorized for a duration equal to a third chosen threshold;

[0019] - in its step, when the vehicle comprises an electric energy generator suitable for supplying electrical energy to the on-board network, it is possible to determine whether the electrical energy generator is active or has operated for a period greater than or equal to a second threshold before going to sleep, and if so, use can be authorized for a period which is equal to a third chosen threshold.

[0020] The invention also proposes a computer program product comprising a set of instructions which, when executed by processing means, is capable of implementing a management method of the type presented above for managing in a vehicle, comprising a sleeping powertrain, a supply of electrical energy by a rechargeable service battery of an electric mechanism for opening / closing an opening coupled to an on-board network supplied by the service battery.

[0021] The invention also proposes a management device intended to equip a vehicle comprising a powertrain and an on-board network supplied with electrical energy by a rechargeable service battery and supplying an electric mechanism for opening / closing an opening panel.

[0022] This management device is characterized by the fact that it comprises at least one processor and at least one memory arranged to carry out the operations consisting, in the event of receiving a request to use the electric mechanism while the powertrain is asleep:

[0023] - to be determined, based on an estimate of a state of charge of the battery of easement, of a quantity of electrical energy necessary for the operation of the electric mechanism and of a quantity of electrical energy necessary for the operation of the powertrain, a duration during which the battery of easement can supply electrical energy to the electrical mechanism, then

[0024] - to authorize this use for this determined period.

[0025] The invention also proposes a vehicle, possibly of the automobile type, and comprising a powertrain, an on-board network supplied with electrical energy by a rechargeable service battery and supplying an electric mechanism for opening / closing an opening, as well as a management device of the type presented above. Brief description of the figures

[0026] Other characteristics and advantages of the invention will appear on examining the detailed description below, and the appended drawings, in which:

[0027] [Fig-1] schematically and functionally illustrates an example of the embodiment of a vehicle comprising a distribution box comprising a management device according to the invention and an opening coupled to an electric opening / closing mechanism, itself coupled to an on-board network,

[0028] [Fig.2] schematically and functionally illustrates an exemplary embodiment of a computer for supervising the distribution of electrical energy comprising an exemplary embodiment of a management device according to the invention, and

[0029] [Fig.3] schematically illustrates an example of an algorithm implementing a management method according to the invention. Detailed description of the invention

[0030] The invention aims in particular to propose a management method, and an associated management device DG, intended to allow the management in a vehicle V, comprising a GMP, of the supply of electrical energy, by a service battery BS when the GMP is asleep, of an electrical mechanism ME for opening / closing an opening OM coupled to an on-board network RB.

[0031] In the following, it is considered, by way of non-limiting example, that the vehicle V is of the automobile type. It is for example a car, as illustrated in [Fig.l]. But the invention is not limited to this type of vehicle. It relates in fact to any type of vehicle comprising an on-board network supplied with electrical energy by a power supply unit comprising at least one rechargeable service battery. Thus, it relates, for example, to land vehicles (utility vehicles, camper vans, minibuses, coaches, trucks, motorcycles, road machinery, construction machinery, agricultural machinery, leisure machinery (snowmobile, kart), and tracked vehicles, for example), boats and aircraft.

[0032] Furthermore, it is considered in the following, by way of non-limiting example, that the vehicle V comprises a powertrain (or GMP) of the all-electric type (and therefore whose drive is provided exclusively by at least one prime mover But the GMP could be hybrid (thermal and electric) or purely thermal.

[0033] [Fig.l] schematically shows a vehicle V comprising an electric GMP transmission chain, an on-board network RB, a power supply unit comprising a service battery BS and (here) an electric energy generator GE, a (motorized) opening element OM coupled to an electric opening / closing mechanism ME, and a management device DG according to the invention.

[0034] It is considered in the following, by way of non-limiting example, that the (motorized) opening OM controls access to a trunk of the vehicle V, here installed in a rear part PRV of the latter (V). It can therefore be a trunk flap or a tailgate. But the (motorized) opening OM could control access to a front trunk or to the passenger compartment of the vehicle V (in this latter alternative it can be a side door (or door)).

[0035] The on-board network RB is an electrical power supply network to which electrical (or electronic) equipment (or components) that consume electrical energy are coupled (or connected), and in particular the electrical mechanism ME for opening / closing the (motorized) opening OM.

[0036] The service battery BS is responsible for supplying electrical energy to the on-board network RB, in addition (here) to that supplied by the electrical energy generator GE. For example, this service battery BS may be arranged in the form of a very low voltage type battery (typically 12 V, 24 V or 48 V). Here it is rechargeable at least by the electrical energy generator GE of the vehicle power supply unit V. It is considered in the following, by way of non-limiting example, that the service battery BS is of the 12 V Lithium-ion type.

[0037] The transmission chain has a GMP which is, here, purely electric and therefore which comprises, in particular, an electric driving machine MM1, a motor shaft AM, a main battery BP and a transmission shaft AT. Here, the term “electric driving machine” means an electric machine arranged so as to provide or recover torque to move the vehicle V.

[0038] The prime mover MM1 (here an electric motor) is coupled to the main battery BP, in order to be supplied with electrical energy, as well as possibly to supply this main battery BP with electrical energy. It is coupled to the motor shaft AM, to provide it with torque by rotational drive. This motor shaft AM is here coupled to a reducer RD which is also coupled to the transmission shaft AT, itself coupled to a first train T1 (here of wheels), preferably via a differential DI.

[0039] This first train T1 is here located in the front part PVV of the vehicle V. But in a variant this first train T1 could be the one which is here referenced T2 and which is located in the rear PRV part of the vehicle V.

[0040] For example, the main battery BP may be of low voltage type (typically 400 V for illustration). But it could be of medium voltage or high voltage type.

[0041] The driving machine MM1 is, here, also coupled to the electric energy generator GE which is also indirectly coupled to the service battery BS, in particular to recharge it with electric energy coming from the main battery BP and converted.

[0042] This electrical energy generator GE is a current converter, for example. Here too, it is responsible for supplying the on-board network RB with electrical energy from the main battery BP and converted when the GMP is in operation, in addition to ensuring the recharging of the service battery BS.

[0043] It will be noted that in the example illustrated non-limitingly in [Fig.l] the vehicle V comprises a distribution box BD to which the service battery BS, the electrical energy generator GE and the on-board network RB are coupled. This distribution box BD is responsible for distributing in the on-board network RB the electrical energy produced by the electrical energy generator GE and / or stored in the service battery BS, for the supply of the electrical components (or equipment) according to received power supply requests. The supervision of the distribution of this electrical energy can be ensured by a supervision computer CS. In the example illustrated non-limitingly in [Fig.l], the supervision computer CS is part of the distribution box BD. But in an alternative embodiment (not illustrated) the supervision computer CS could not be part of the distribution box BD.

[0044] It will also be noted that in the example illustrated non-limitingly in [Fig.l] the vehicle V comprises a monitoring box BB which is coupled to the service battery BS and which is responsible for determining, estimating or measuring its (internal) temperature tb, the voltage at its terminals and its current state of charge. This monitoring box BB is, for example, coupled to the distribution box BD (when it comprises the supervision computer CS).

[0045] As mentioned above, the invention notably proposes a management method intended to enable the management of the electrical energy supply to the electrical mechanism ME by the service battery BS when the GMP is asleep.

[0046] This (management) method can be implemented at least in part by a management device DG of the type illustrated in [Fig.2] and comprising at least one processor PR1 and at least one memory MD which are arranged to carry out operations when it has been woken up, for example by the supervision computer CS following the reception of a request to use the electrical mechanism ME while the GMP is asleep.

[0047] It will be noted that in the example illustrated non-limitingly in [Fig.l], the device DG management is part of the CS supervision computer. But it could be a device coupled to the CS supervision computer. Generally speaking, the DG management device is made in the form of a combination of electrical or electronic circuits or components (or "hardware") and software modules (or "software").

[0048] The processor PR1 may, for example, be a digital signal processor (or DSP). This processor PR1 may comprise integrated (or printed) circuits, or several integrated (or printed) circuits connected by wired or wireless connections. An integrated (or printed) circuit is understood to mean any type of device capable of performing at least one electrical or electronic operation. Thus, it may, for example, be a microcontroller.

[0049] The memory MD is live in order to store instructions for the implementation by the processor PR1 of at least part of the management method described below (and therefore of its functionalities).

[0050] As illustrated non-limitingly in [Fig.3], the (management) method, according to the invention, comprises a step 10-20 which is implemented each time a request to use the electrical mechanism ME is received while the GMP is asleep.

[0051] This step 10-20 firstly comprises a sub-step 10 in which one (the management device DG) determines, as a function of an estimate ece of a state of charge of the service battery BS, of a quantity qem of electrical energy necessary for the operation of the electrical mechanism ME, and of a quantity qee of electrical energy necessary for the operation of the GMP, a duration da during which the service battery BS can supply electrical energy to the electrical mechanism ME.

[0052] It will be noted that the quantity qem of electrical energy which is necessary for the operation of the electrical mechanism ME is known to the management device DG because it was determined for the vehicle V during test phases in a test center or in a factory. This quantity qem may possibly be variable depending on the (internal) temperature tb.

[0053] Step 10-20 also includes a sub-step 20 in which the management device DG authorizes the use of the electrical mechanism ME for the determined duration da. It will be understood that when the determined duration da is zero, the use of the electrical mechanism ME is prohibited.

[0054] Thus, before each use of the electrical mechanism ME, we know whether this risks causing a discharge of the service battery BS such as to make it incapable of providing sufficient electrical energy for the next start of the GMP, and therefore we act accordingly.

[0055] It will be understood that it is the processor PR1 and memory MD which are arranged to carry out the operations consisting, in the event of receipt of a request to use the electrical mechanism ME while the GMP is asleep:

[0056] - to be determined, based on the ece estimate of the state of charge of the battery of servitude BS, the quantity qem of electrical energy required for the operation of the electric mechanism ME and the quantity qee of electrical energy required for the operation of the GMP, the duration da during which the BS servitude battery can supply electrical energy to the electric mechanism ME, then

[0057] - to authorize this use for this determined period da.

[0058] For example, in sub-step 20 of step 10-20 one (the management device DG) can authorize the use of the electric mechanism ME for the determined duration da when the latter (da) is greater than a first threshold if chosen. In this case, if the determined duration da is greater than zero and less than the first threshold if, the use of the electric mechanism ME is prohibited. This option is intended to prevent the user of the vehicle V from keeping the opening OM open for a duration longer than the determined duration da (which is then low), which could prevent the service battery BS from providing sufficient electrical energy for the next start of the GMP.

[0059] The first threshold si can, for example, be between 30 s and 2 min. For example, the first threshold si can be equal to 1 min.

[0060] Also for example, in sub-step 10 of step 10-20 one (the management device DG) can determine the estimation of the state of charge ece as a function of the initial state of charge eci of the service battery BS when the vehicle V was last asleep and of the estimation eqp of the quantity of electrical energy lost by the service battery BS since this last asleep. It will be understood that the estimation of the state of charge ece is here equal to the difference between the initial state of charge eci (stored in a memory (for example of the management device DG)) and the estimation of the quantity of electrical energy lost eqp (which is quantifiable as a function of data determined for the vehicle V, in particular during test phases in a test center or in a factory).This option is particularly advantageous when it is impossible to obtain from the monitoring box BB the current charge status of the service battery BS following the receipt of a request to use the electrical mechanism ME while the GMP is asleep.

[0061] Also for example, in sub-step 10 of step 10-20 one (the management device DG) can determine the duration da and / or the quantity qee of electrical energy necessary for the operation of the GMP as a function of the current (internal) temperature tb of the service battery BS. It is in fact recalled that the (internal) temperature tb influences the quantity qee of electrical energy necessary for the operation operation of the GMP and the quantity qem of electrical energy required for the operation of the ME electrical mechanism, as well as certain thresholds.

[0062] Also for example, in sub-step 10 of step 10-20, when the GMP has operated for a duration which is greater than or equal to a second threshold s2 before it goes to sleep, one (the management device DG) can authorize the use of the electric mechanism ME for a duration which is equal to a third threshold s3 chosen. It is in fact considered that beyond a certain duration of operation of the GMP (equal to the second threshold s2), the service battery BS has been sufficiently recharged (here by the electric energy generator GE) to allow a maximum duration of use of the electric mechanism ME (equal to the third threshold s3).

[0063] The second threshold s2 may, for example, be between 3 min and 8 min. For example, the second threshold s2 may be equal to 5 min. It will be noted that the second threshold s2 (used by the management device DG) may possibly be variable depending on the (internal) temperature tb.

[0064] The third threshold s3 may, for example, be between 20 min and 40 min. For example, the third threshold s3 may be equal to 30 min. It will be noted that the third threshold s3 (used by the management device DG) may possibly be variable depending on the (internal) temperature tb.

[0065] Also for example, in sub-step 10 of step 10-20, when the vehicle V comprises an electrical energy generator GE (suitable for supplying electrical energy to the on-board network RB), one (the management device DG) can determine whether the electrical energy generator GE is active or has operated for a duration which is greater than or equal to the second threshold s2 before it goes to sleep. If so (duration > s2), one (the management device DG) can authorize the use of the electrical mechanism ME for a duration which is equal to the third threshold s3 chosen.

[0066] It is in fact considered that beyond a certain duration of operation of the electrical energy generator GE (equal to the second threshold s2), while the GMP is asleep (this is for example the case during a recharging phase of the main battery BP), the service battery BS has been sufficiently recharged by the electrical energy generator GE to allow a maximum duration of use of the electrical mechanism ME (equal to the third threshold s3).

[0067] It will be noted that it is possible to transmit (the management device DG can possibly trigger the transmission), via the communication module of the vehicle V, an information message, containing the determined duration da or signaling the impossibility of opening the opening OM so as not to over-discharge the service battery BS, to portable communication equipment (smartphone or tablet) used by the user of the vehicle V who wants to open the OM opening. For example, this information message can be broadcast by at least one loudspeaker of the communication equipment and / or displayed on the screen of the communication equipment.

[0068] It will also be noted that it is possible to take into account a current energy state of the power supply group in order to decide whether to reject or accept the request to use the electrical mechanism ME received. For example, this current energy state can take three different values ​​v11 to v13. The first value v11 may, for example, correspond to an acceptable energy state, the second value v12 may, for example, correspond to a degraded energy state, and the third value v13 may, for example, correspond to an unacceptable energy state (and therefore prevent a future start of the GMP).In this case, in the presence of the first value vl 1 the request is recorded, in the presence of the second value vl2 and an nth request for use since the transition of the energy state from its first value vil to its second value vl2 (with n < maximum number of uses in the degraded energy state) the request is recorded, and in all other cases the request is rejected.

[0069] When the request is recorded, the computer controlling the operation of the electrical mechanism ME and the associated equipment is allowed to remain in an awake state, then the duration da is determined.

[0070] It will also be noted that when a duration da equal to the maximum duration of use of the electrical mechanism ME (or third threshold s3) has been determined in sub-step 10, that the GMP remains asleep and that the electrical energy generator GE remains inactive with a maintenance of the recording of the request for use, it is possible to possibly start a decrement of the duration da (= s3). For example, the decrement can be by one unit (-1) every second if it starts at the value of s3 given in seconds.

[0071] It will also be noted that the value of the energy state may, for example, be determined once the duration da has been determined. In this case, upon receiving a request to use the electrical mechanism ME, the very first value of the energy state which is used to record or reject this request may be the last one having been determined.

[0072] For example, when the electrical energy generator GE is in its active state or the electrical energy generator GE is in its inactive state, the current charge state is greater than a fourth threshold s4 (representing the minimum quantity of electrical energy necessary for the operation of the electrical mechanism ME), and the duration da is non-zero, then the first value vl 1 is assigned to the energy state. Otherwise, when the current charge state is greater than a fifth threshold s5 (representing the minimum quantity of electrical energy necessary for the operation of the electrical mechanism ME), the duration da is non-zero, then the first value vl 1 is assigned to the energy state. operation of the GMP) and less than or equal to the fourth threshold s4, or when the current state of charge is greater than the fourth threshold s4 and the duration da is zero, then the second value vl2 is assigned to the energy state. In other cases, the third value vl3 is assigned to the energy state.

[0073] The fourth threshold s4 may possibly be variable depending on the (internal) temperature tb. For example, when the (internal) temperature tb is of the order of +20°C the fourth threshold s4 may be equal to 65% of the maximum state of charge, while when the (internal) temperature tb is of the order of -20°C the fourth threshold s4 may be equal to 80% of the maximum state of charge.

[0074] The fifth threshold s5 may possibly be variable depending on the (internal) temperature tb. For example, when the (internal) temperature tb is of the order of +20°C the fifth threshold s5 may be equal to 40% of the maximum state of charge, while when the (internal) temperature tb is of the order of -20°C the fifth threshold s5 may be equal to 60% of the maximum state of charge.

[0075] It will also be noted, as illustrated non-limitingly in [Fig. 2], that the supervision computer CS (or the possible computer of the management device DG) can also comprise, in addition to the RAM MD and processor PR1, a mass memory MM2, in particular for storing the (internal) temperature tb, the initial state of charge eci or the current state of charge, and intermediate data involved in all its calculations and processing. Furthermore, this supervision computer CS (or the possible computer of the management device DG) can also comprise an input interface IE for receiving the (internal) temperature tb and the initial state of charge eci or the current state of charge and requests for use of the electrical mechanism ME, possibly after having shaped and / or demodulated and / or amplified them, in a manner known per se, by means of a digital signal processor PR2.In addition, this supervision calculator CS (or the possible calculator of the management device DG) can also include an output interface IS, in particular to deliver at least the messages authorizing use of the electrical mechanism ME (with the determined duration da), and any information messages intended for the user of the vehicle V. .

[0076] 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 electronic circuit (or hardware) type, such as for example the processor PR1, is capable of implementing the management method described above to manage the supply of electrical energy to the electrical mechanism ME by the service battery BS when the GMP is asleep.

Claims

Claims

1. Management method for a vehicle (V) comprising a powertrain and an on-board network (RB) supplied with electrical energy by a rechargeable service battery (BS) and supplying an electric mechanism (ME) for opening / closing an opening (OM), characterized in that it comprises a step (10-20) in which, in the event of receiving a request to use said electric mechanism (ME) while said powertrain is asleep, i) determining, as a function of an estimate of a state of charge of said service battery (BS), of a quantity of electrical energy necessary for the operation of said electric mechanism (ME) and of a quantity of electrical energy necessary for the operation of said powertrain, a duration during which said service battery (BS) can supply said electric mechanism (ME) with electrical energy, then ii) authorizing said use for said determined duration.

2. Method according to claim 1, characterized in that in said step (10-20) said use is authorized for said determined duration when the latter is greater than a first chosen threshold.

3. Method according to claim 1 or 2, characterized in that in said step (10-20) said estimate of the state of charge is determined as a function of an initial state of charge during a last sleep of said vehicle (V) and of an estimate of a quantity of electrical energy lost by said service battery (BS) since this last sleep.

4. Method according to one of claims 1 to 3, characterized in that in said step (10-20) said duration and / or said quantity of electrical energy necessary for the operation of said powertrain is determined as a function of a current temperature of said service battery (BS).

5. Method according to one of claims 1 to 4, characterized in that in said step (10-20), when said powertrain has operated for a duration greater than or equal to a second threshold before said falling asleep, said use is authorized for a duration equal to a third chosen threshold.

6. Method according to one of claims 1 to 4, characterized in that in said step (10-20), when said vehicle (V) comprises a generator of electrical energy (GE) capable of supplying electrical energy to said on-board network (RB), it is determined whether said electrical energy generator (GE) is active or has operated for a duration greater than or equal to a second threshold before said falling asleep, and if so, said use is authorized for a duration equal to a third chosen threshold.

7. Computer program product comprising a set of instructions which, when executed by processing means, is capable of implementing the management method according to one of claims 1 to 6 for managing in a vehicle (V), comprising a sleeping powertrain, a supply of electrical energy by a rechargeable service battery (BS) of an electric mechanism (ME) for opening / closing an opening (OM) coupled to an on-board network (RB) powered by said service battery (BS).

8. Management device (DG) for a vehicle (V) comprising a powertrain and an on-board network (RB) supplied with electrical energy by a rechargeable service battery (BS) and supplying an electric mechanism (ME) for opening / closing an opening (OM), characterized in that it comprises at least one processor (PR) and at least one memory (MD) arranged to carry out the operations consisting, in the event of receipt of a request to use said electric mechanism (ME) while said powertrain is asleep, i) in determining, as a function of an estimate of a state of charge of said service battery (BS), of a quantity of electrical energy necessary for the operation of said electric mechanism (ME) and of a quantity of electrical energy necessary for the operation of said powertrain, a duration during which said service battery (BS) can supply said electric mechanism (ME) with electrical energy,then (ii) to authorize said use for said fixed period.,

9. Vehicle (V) comprising a powertrain and an on-board network (RB) supplied with electrical energy by a rechargeable service battery (BS) and supplying an electric mechanism (ME) for opening / closing an opening (OM), characterized in that it further comprises a management device (DG) according to claim Q

10. O. Vehicle according to claim 9 characterized in that it is of the automobile type. 14

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