FR3138886A1 - SAFE POWER INTERFACE DEVICE WHEN PAIRING TO A SYSTEM CHARGING CONNECTOR AND EXTERNAL ELECTRICAL EQUIPMENT - Google Patents

Abstract

An interface device (DIF) has a type defined by a first voltage, comprises an internal device (DI1) ensuring at least one internal function when it receives a second voltage, and is coupled to electrical equipment requiring a current of power supply and a charging connector (CNR) equipping a system (S) and connected to a detection circuit (CD) detecting this type, a control line (LC) providing this second voltage in the event of detection of the type and a line power supply (LA) supplying this supply current. This interface device (DIF) also comprises a first control element (EC1) capable, when it receives the second voltage and in the absence of signaling of a fault by the internal device (DI1), to trigger a variation predefined of the first specific voltage, in the event of detection by the detection circuit (CD), to trigger the supply of the supply current for the electrical equipment. Figure 2

Description

SAFE POWER INTERFACE DEVICE WHEN PAIRING TO A SYSTEM CHARGING CONNECTOR AND EXTERNAL ELECTRICAL EQUIPMENT Technical field of the invention

Interface devices can be coupled to system charging connectors and external electrical equipment requiring power current to operate.

State of the art

Certain systems, such as for example certain vehicles (possibly of the automobile type), include a battery which is rechargeable under the control of an on-board charger, and a charging connector which is coupled to this battery and this charger and capable of being temporarily coupled to an external connector connected to an external power source during a recharging phase of this battery.

It has recently been proposed to use this type of system as an electrical power source for at least one external electrical equipment, such as for example an electric bicycle, a trailer, a caravan, a barbecue or a lighting device. . To do this, we connect to the charging connector of the system an interface device, coupled to the external electrical equipment (and possibly forming part of the latter), and the system supplies this external electrical equipment, via the charging connector and the interface device, a supply current from its rechargeable battery.

When it is desired that the supply current supplied by the system corresponds to what the external electrical equipment requires, the interface device can have a predefined detectable type (for example in the form of a first voltage) and representative of this supply current. In this case, the system may comprise, firstly, a detection circuit suitable for detecting the type of the interface device (for example its first voltage), secondly, a control line suitable for providing this second voltage in the event of detection of this type, and, on the third hand, a power supply line capable of supplying this supply current, these detection circuit, control line and power line being all three connected to associated terminals of the charging connector.

Currently, certain systems include a charging calculator which is capable of exchanging charging information with external electrical equipment temporarily coupled to their charging connector via the interface device, and arranged so as to trigger supply via the line d supplying the power supply to this external electrical equipment as soon as the type of the interface device is detected by the detection circuit. However, it may happen that the interface device is subject to a malfunction that is potentially dangerous for a user, both of the system and of the external electrical equipment that must be powered by the latter. This is particularly the case, although not exclusively, when the malfunction induces an insulation fault which could, for example, lead to electrocution.

It will therefore be understood that currently, in the event of a malfunction of the interface device, there is no solution to prevent the power line from providing supply current for the external electrical equipment when the type of this interface device has been detected by the system detection circuit.

The invention therefore aims in particular to improve the situation.

Presentation of the invention

It proposes in particular for this purpose an interface device having a type defined by a first voltage, comprising at least one internal device ensuring at least one internal function when it receives a second voltage, and capable of being coupled to at least one piece of equipment external electrical requiring a supply current to operate and to a charging connector fitted to a system and connected to a detection circuit suitable for detecting this type, a control line suitable for supplying this second voltage in the event of detection of the type and a power line suitable for supplying this supply current and equipping all three of the system.

This interface device is characterized by the fact that it also includes a first control element capable of triggering a predefined variation when it receives the second voltage and in the absence of a fault being signaled by an internal device. of the first specific voltage, in the event of detection by the detection circuit, to trigger the supply of the supply current for the (each) external electrical equipment.

Thanks to the invention, it is now possible to prevent the power line of the system from providing supply current for external electrical equipment when the type of the interface device has been detected by the detection circuit, then a A malfunction of the interface device has been reported, thus allowing a user of the system or this external electrical equipment to avoid the risk of being put in danger.

The interface device according to the invention may include other characteristics which can be taken separately or in combination, and in particular:

- it can comprise, on the one hand, a first resistive component having a first resistance and suitable for being coupled to the detection circuit, on the second hand, a second resistive component having a second resistance and suitable for being coupled in parallel to the first resistive component, and, on the third hand, a control member suitable, when placed in a first state predefined by a user, to allow the parallel coupling of the first and second resistive components to define the first voltage ;

- in the presence of the first option, it may comprise a third resistive component having a third resistance and capable of being coupled in series to the second resistive component when the first control element receives the second voltage and in the absence of signaling of a default by an internal device, in order to define the predefined variation of the first voltage;

- in the presence of the last sub-option, it can include a second control element coupled to each internal device and suitable, when it receives the second voltage and a fault signal by an internal device, to prevent the series coupling of the second and third resistive components;

- in the presence of the last sub-sub-option, the first control element may be able to prevent series coupling of the second and third resistive components when it does not receive the second voltage.

The invention also proposes (external) electrical equipment requiring a supply current to operate and comprising an interface device of the type presented above.

The invention also proposes a system comprising:

- a detection circuit capable of detecting a type defined by a first voltage,

- a control line capable of supplying a second voltage in the event of detection of this type,

- a power supply line capable of supplying a supply current,

- a charging connector connected to the detection circuit, control line and power line, and

- a charging calculator capable of exchanging charging information with at least one external electrical equipment requiring this supply current to operate and temporarily coupled to the charging connector.

This system is characterized by the fact that in the event of coupling of its charging connector to an interface device of the type presented above and coupled to (each) external electrical equipment:

- its detection circuit is capable of detecting the predefined variation of the first voltage and of reporting this detected predefined variation to the charging computer, and

- its recharge calculator is arranged so as to trigger the supply of the second voltage by the control line in the event of detection of the type, and to trigger the supply by the supply line of the supply current for the (each) external electrical equipment in the event of detection of this predefined variation being reported.

For example, this system can constitute a vehicle comprising a powertrain (or GMP) comprising at least one electric driving machine capable of being supplied with electrical energy by a rechargeable battery via the charging connector.

Also for example, this system can constitute an automobile type vehicle.

Brief description of the figures

Other characteristics and advantages of the invention will appear on examination of the detailed description below, and the appended drawings, in which:

schematically and functionally illustrates an exemplary embodiment of a vehicle comprising a GMP, with an electric motor powered by a rechargeable main battery and coupled to a charging connector to which is temporarily coupled an interface device according to the invention,

schematically and functionally illustrates an exemplary embodiment of an interface device according to the invention, forming part of an electrical power cable of external electrical equipment and temporarily connected to a charging connector of the vehicle of the .

Detailed description of the invention

The invention aims in particular to propose a DIF interface device intended to be coupled to at least one external electrical equipment EE requiring a supply current to operate and to a CNR charging connector equipping a system S also comprising a battery BR rechargeable via this CNR charging connector and able to provide this supply current.

In what follows, we consider, by way of non-limiting example, that the system S is a motor vehicle. This is for example a car, as illustrated in the . But the invention is not limited to this type of system. It concerns in fact any type of system comprising a charging connector making it possible to recharge a rechargeable battery when an interface device or an external connector, coupled to an external power source, is connected to it. Consequently, the system can be a vehicle (land, sea (or river), or air), an electrical appliance (including household or consumer appliances), an installation (including industrial type), or a building.

Furthermore, we consider in what follows, by way of non-limiting example, that the system S (here a vehicle) comprises a powertrain (or GMP) of all-electric type (and therefore whose traction is ensured exclusively by at least least one electric driving machine MME). But the GMP could be of hybrid type (thermal and electric).

Furthermore, we consider in what follows, by way of non-limiting example, that the rechargeable battery BR of the system S, coupled to the charging connector CNR, is responsible for powering the electric motive machine MME of the GMP, a battery of BS easement and an RB on-board network. This is therefore a main (or traction) battery. But the BR battery could provide electrical energy for only part of the aforementioned equipment and/or at least one other piece of equipment in its system S.

We have schematically represented on the a system S (here a vehicle) comprising an electric GMP transmission chain (and therefore an MME electric driving machine), an on-board network RB, a service battery BS, a main (or traction) battery BR, a converter CV, and a CNR charging connector to which a DIF interface device according to the invention is temporarily connected.

It will be noted that in the example illustrated non-limitingly on the the interface device DIF is part of an electrical power cable C2 which itself is part of external electrical equipment EE requiring a supply current cal to operate. But this is not obligatory. Indeed, a DIF interface device, according to the invention, can be equipment in itself (or adapter) intended to be coupled to a CNR charging connector of a system S and to at least one external electrical equipment EE ( for example to a connector of a power cable of the latter (EE)).

For example, external electrical equipment EE may be an electric bicycle. But it can be any electrical device or equipment external to the S system, and in particular a trailer, a caravan, a mobile home, a barbecue, or a device lighting.

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

The utility battery BS is responsible for supplying electrical energy to the on-board network RB, in addition to that supplied by the CV converter powered by the main battery BR, and sometimes in place of this CV converter. For example, this BS utility battery can be arranged in the form of a very low voltage type battery (typically 12 V, 24 V or 48 V). It is rechargeable at least via the CV (current) converter. We consider in the following, by way of non-limiting example, that the BS utility battery is of the 12 V Lithium-ion type.

The electric driving machine MME is an electric machine arranged so as to provide torque to move the system S (here a vehicle) when it is supplied with electrical energy by the main battery BR, as well as possibly to recover torque (by example in a regenerative braking phase).

The CV converter is also responsible during the driving phases of the system S (here a vehicle) of converting part of the electric current stored in the main battery BR to supply converted electric current to the on-board network RB and the utility battery BS ( to recharge it).

Note, as illustrated non-limitatively in the , that the CV converter can be part of a CH charger also comprising an AC recharge calculator responsible, in particular, for controlling the recharges of the main battery BR. This AC charging calculator is particularly suitable for exchanging charging information with the (each) external electrical equipment EE temporarily coupled to the CNR charging connector via the DIF interface device.

The main (or traction) battery BR can, for example, include electrical energy storage cells, possibly electrochemical (for example of the lithium-ion (or Li-ion) or Ni-Mh or Ni-Cd type). Also for example, the main battery BR can be of the low voltage type (typically 450 V for illustration purposes). But it could be medium voltage or high voltage.

It should also be noted that the main battery BR is associated with a battery box BB which notably includes a battery calculator CB.

The CNR charging connector is connected to the main battery BR and the charger CH via a power line (or circuit) LA. This allows the latter (LA) to provide in particular the cal supply current which is necessary for the operation of external electrical equipment EE temporarily coupled to the CNR charging connector via the DIF interface device. It will also be noted that in the example illustrated non-limitingly on the the power supply line (or circuit) LA is double in order to allow the main battery BR to be recharged in mode 2 or 3 as well as in mode 4. But the power supply line (or circuit) LA can be simple when only recharges in mode 2 or 3 are possible.

The CNR charging connector is also connected to an LC control line and a CD detection circuit of the S system.

The detection circuit CD is arranged so as to in particular detect the type of an external connector or of the DIF interface device as a function of a first voltage u1 across the detection circuit CD, and in particular if it is adapted for recharging in mode 2, 3 or 4 or for powering at least one external electrical equipment EE. This may be what those skilled in the art frequently call a proximity line.

The LC control line is arranged so as to allow exchanges of information with an external connector or external electrical equipment EE which is temporarily connected to the CNR charging connector via the DIF interface device. It may be what those skilled in the art frequently call a control pilot line (or in English “control pilot line” (CPL)). It is preferably coupled to the CH charger which controls the recharges, as illustrated without limitation on the .

Furthermore, this control line LC is capable of providing a second voltage u2, necessary for the operation of at least one internal device DIj of the interface device DIF and to which we will return later, in the event of detection of the type of device DIF interface by the CD detection circuit. In fact, in the event of coupling of the CNR charging connector to the DIF interface device, the detection circuit CD is able to detect the first voltage u1 and to signal the latter (u1) to the AC charging computer, which then charges to trigger the supply of the second voltage u2 by the control line LC so that each internal device DIj is powered.

As illustrated at least partially in Figures 1 and 2, a DIF interface device, according to the invention, comprises at least one internal device DIj and a first control element EC1.

Each internal device DIj is arranged so as to ensure at least one internal function when it receives the second voltage u2 coming from the LC control line on terminals which are associated with this LC control line. In addition, each internal device DIj is arranged so as to signal an internal operating fault of its interface device DIF.

For example, each internal function, provided by an internal device DIj, can be chosen from a function for controlling the operation of at least part of the interface device DIF, a function for monitoring at least part of the device d DIF interface, a protection function of at least part of the DIF interface device, an operation diagnostic function of at least part of the DIF interface device, and a signaling function of at least one operating state of an internal device DIj. It will be understood that such internal functions are intended to participate in securing the supply of electrical energy (from the system S) to each external electrical equipment EE coupled to the interface device DIF, via the electrical power cable C2 ( to which the latter (DIF) possibly belongs).

In the example illustrated non-limitingly on the , the DIF interface device comprises three internal devices DI1 to DI3 (j = 1 to 3) connected in parallel to the terminals of the DIF interface device which are intended to be coupled to the terminals of the CNR charging connector connected to the charging line LC control. But a DIF interface device can include any number of internal devices DIj, as long as this number is at least equal to one (1).

For example, the first internal device DI1 (j = 1) can provide a function of controlling the operation of at least part of the interface device DIF. It can for example include at least one microcontroller.

Also for example, the second internal device DI2 (j = 2) can provide a monitoring function and a protection function for at least part of the DIF interface device. It can for example include at least one electrical insulation controller and/or a temperature controller (thermal monitoring).

Also for example, the third internal device DI3 (j = 3) can provide a signaling function for at least one operating state of an internal device DIj. It can for example include at least one light emitting diode (or LED (“light emitting diode”)).

The first control element EC1 is able, when it receives the second voltage u2 and in the absence of signaling of a fault by an internal device DIj, to trigger a predefined variation vp of the first voltage u1. This predefined variation vp is capable, in the event of detection by the detection circuit CD, of triggering the supply of the supply current for the (each) external electrical equipment EE.

It will be understood that in the event of coupling of the CNR charging connector to the DIF interface device, the detection circuit CD is capable of detecting the predefined variation vp of the first voltage and of reporting this predefined variation vp detected to the AC charging computer. . On receipt of this signal, the CA recharging computer is responsible for triggering the supply by the supply line LA of the supply current cal (from the main battery BR) for the (each) external electrical equipment EE (and therefore via the associated terminals of the DIF interface device).

It will be understood that in the absence of reception of the second voltage u2 by the first control element EC1 and/or in the presence of a fault signal by an internal device DIj, the interface device DIF does not deliver of predefined variation vp of the first voltage u1 on its terminals which are coupled to the terminals of the charging connector CNR associated with the detection circuit CD. Consequently, the latter (CD) can only detect the first voltage u1 (and therefore the type of the DIF interface device), which is interpreted by the AC charging calculator as a malfunction of the DIF interface device requiring not to provide it with cal supply current. Thus, when the DIF interface device is the subject of a malfunction, a user of the system S or of external electrical equipment EE (which must be powered by the latter (S)) does not risk being put into operation. danger, which is particularly advantageous. In other words, the DIF interface device is securely powered when it is coupled to at least one external electrical equipment EE and to the CNR charging connector.

For example, and as illustrated without limitation on the , the DIF interface device can also include first CR1 and second CR2 resistive components and a control member OC.

The first resistive component CR1 has a first resistance r1 and is capable of being coupled to the detection circuit CD, and more precisely on its terminals coupled to the terminals of the charging connector CNR which are associated with the detection circuit CD.

The second resistive component CR2 has a second resistance r2 and is capable of being coupled in parallel to the first resistive component CR1.

The control member OC is capable, when placed in a first state predefined by a user, of allowing the parallel coupling of the first CR1 and second CR2 resistive components to define the first voltage u1. It will be understood that it is when the first CR1 and second CR2 resistive components find themselves coupled in parallel, thanks to the placement of the control member OC in its first state predefined by the user, that this causes the definition of the first voltage u1 (function of the first r1 and second r2 resistors) on the terminals of the DIF interface device which are coupled to the terminals of the CNR charging connector associated with the CD detection circuit.

It will be understood that the parallel coupling of the first CR1 and second CR2 resistive components makes it possible to signal to the AC charging calculator that the DIF interface device has been put into operation, and therefore in the absence of such parallel coupling the the AC recharge calculator deduces that the DIF interface device has not been put into operation and therefore that there is nothing to do (and in particular not to trigger the supply of the second voltage u2).

For example, the first resistive component CR1 can be a simple resistor. But as a variant, the first resistive component CR1 can consist of at least one electronic component. As an illustrative example, the first resistance r1 can be equal to approximately 3.2 kΩ.

Also for example, the second resistive component CR2 can be a simple resistor. But as a variant, the second resistive component CR2 can consist of at least one electronic component. As an illustrative example, the second resistance r2 can be equal to 20 Ω.

Also for example, the control member OC can be a simple switch mounted in series with the first resistive component CR1, and having a first on (or closed) state, causing the parallel coupling of the first CR1 and second CR2 resistive components, and a second non-conducting (or open) state, preventing parallel coupling of the first CR1 and second CR2 resistive components.

Also for example, and as illustrated non-limitingly on the , the DIF interface device can also include a third resistive component CR3 having a third resistance r3. In this case, the third resistive component CR3 is capable of being coupled in series to the second resistive component CR2 when the first control element EC1 receives the second voltage u2 and in the absence of signaling of a fault by an internal device DIj, in order to define the predefined variation vp of the first voltage u1.

It will be understood that when the first CR1 and third CR3 resistive components find themselves coupled in series while being coupled in parallel to the second resistive component CR2, this causes the definition of the predefined variation vp of the first voltage u1 on the terminals of the device. DIF interface which are coupled to the terminals of the CNR charging connector associated with the CD detection circuit.

For example, the third resistive component CR3 can be a simple resistor. But as a variant, the third resistive component CR3 can be made up of at least one electronic component. As an illustrative example, the third resistance r3 can be equal to approximately 40 Ω when the supply current cal is 16 A, and to approximately 20 Ω when the supply current cal is 32 A.

Also for example, and as illustrated non-limitingly on the , the interface device DIF can also include a second control element EC2 coupled to each internal device DIj and arranged, when it receives the second voltage u2 and a fault signal by an internal device DIj, so as to prevent coupling in series with the second CR2 and third CR3 resistive components.

It will be understood that when the second control element EC2 does not receive the second voltage u2, or receives the second voltage u2 but no fault signaling by an internal device DIj, it allows the series coupling of the second CR2 and third CR3 components resistive.

In this case, the second control element EC2 can, for example, be a switch having first and second states depending on the reception or absence of reception of a fault signal. For example, it can normally be placed in a first non-conducting (or open) state, authorizing the series coupling of the second CR2 and third CR3 resistive components, when it does not receive the second voltage u2 or when it receives the second voltage u2 but no fault signal, and placed in a second on (or closed) state, causing a short circuit of the third resistive component CR3, when it receives the second voltage u2 and a fault signal.

Also for example, and as illustrated non-limitingly on the , the first control element EC1 may be capable of preventing the series coupling of the second CR2 and third CR3 resistive components when it does not receive the second voltage u2. This sub-option is intended to prevent this series coupling when the second control element EC2 is placed in its first non-conducting (or open) state and it does not receive the second voltage u2.

In this case, the first control element EC1 can, for example, be a switch having first and second states depending on its voltage supply. For example, it can be normally placed in a first conducting (or closed) state, causing a short circuit of the third resistive component CR3, when it does not receive the second voltage u2, and placed in a second non-conducting state (or open), authorizing the series coupling of the second CR2 and third CR3 resistive components, when it receives the second voltage u2.

Also for example, and as illustrated non-limitingly on the , the control line LC may include a switch or relay CS having first B1, second B2 and third B3 terminals. The first terminal B1 is connected to a first sub-part SP1 of the control line LC which is connected to an associated terminal of the CNR charging connector. The second terminal B2 is connected to a second sub-part SP2 of the control line LC which is connected to the charger CH (and more precisely to the AC charging calculator). The third terminal B3 is connected to an electrical supply circuit C1 of the system S. This switch (or relay) CS is arranged so as to couple the first terminal B1 to the second terminal B2 or to the third terminal B3 depending on the type detected to allow or prohibit the supply of the second voltage u2.

It will be understood that if the switch (or relay) CS receives a first command from the AC charging calculator, it is configured so as to couple its first terminal B1 to its third terminal B3 so that the internal devices DIj, the first control element EC1 and the possible second control element EC2 are supplied with the second voltage u2. On the other hand, if the switch (or relay) CS receives a second command, it is configured so as to couple its first terminal B1 to its second terminal B2 to prevent the supply of the second voltage u2 to the interface device DIF via the connector CNR recharge.

Such a three-terminal CS switch (or relay) can be produced using at least one electronic component.

The electrical supply circuit C1 can provide at least the second voltage u2. It can be supplied with electrical energy from the BS service battery or the BR main battery. However, when the supply voltage is very low it is preferable for the electrical energy to come from the BS service battery. But we could envisage that the electrical energy comes from the main battery BR, via the CV converter (which then ensures at least part of its conversion). It will be understood that the electrical supply circuit C1 is arranged so as to generate at least the second voltage u2 from a voltage that it receives, for example from the on-board network RB or from the converter CV. It can therefore include a voltage converter, in particular.

Note also, as illustrated non-limitatively in the , that the electrical power supply circuit C1 may optionally include a protection diode DP making it possible to protect the power supply, for example in the case of connection of the interface device DIF or an external connector to external electrical equipment EE containing it -even a power supply (such as a charging terminal).

Claims (9)

Interface device (DIF) having a type defined by a first voltage, comprising at least one internal device (DIj) ensuring at least one internal function when it receives a second voltage, and capable of being coupled to at least one piece of electrical equipment (EE) requiring a supply current to operate and to a charging connector (CNR) fitted to a system (S) and connected to a detection circuit (CD) suitable for detecting said type, a control line (LC) own to supply said second voltage in the event of detection of said type and a power supply line (LA) capable of supplying said supply current and equipping said system (S), characterized in that it further comprises a first control element (EC1) capable, when it receives said second voltage and in the absence of signaling of a fault by an internal device (DIj), to trigger a predefined variation of said first own voltage, in the event of detection by said circuit of detection (CD), to trigger the supply of said supply current for said electrical equipment (EE). Interface device according to claim 1, characterized in that it comprises i) a first resistive component (CR1) having a first resistance and capable of being coupled to said detection circuit (CD), ii) a second resistive component (CR2 ) having a second resistance and capable of being coupled in parallel to said first resistive component (CR1), and iii) a control member (OC) capable, when placed in a first state predefined by a user, of allowing said coupling in parallel with said first (CR1) and second (CR2) resistive components to define said first voltage. Interface device according to claim 2, characterized in that it comprises a third resistive component (CR3) having a third resistance and capable of being coupled in series to said second resistive component (CR2) when said first control element (EC1) receives said second voltage and in the absence of signaling of a fault by an internal device (DIj), in order to define said predefined variation of the first voltage. Interface device according to claim 3, characterized in that it comprises a second control element (EC2) coupled to each internal device (DIj) and own, when it receives said second voltage and a fault signal by a device internal (DIj), to prevent said series coupling of said second (CR2) and third (CR3) resistive components. Interface device according to claim 4, characterized in that said first control element (EC1) is capable of preventing said series coupling of said second (CR2) and third (CR3) resistive components when it does not receive said second voltage . Electrical equipment (EE) requiring a supply current to operate, characterized in that it comprises an interface device (DIF) according to one of the preceding claims. System (S) comprising i) a detection circuit (CD) capable of detecting a type defined by a first voltage, ii) a control line (LC) capable of supplying a second voltage in the event of detection of said type, iii) a power line (LA) capable of supplying a supply current, iv) a charging connector (CNR) connected to said detection circuit (CD), control line (LC) and power line (LA), and v) a charging calculator (CA) capable of exchanging charging information with at least one external electrical equipment (EE) requiring said supply current to operate and temporarily coupled to said charging connector (CNR), characterized in that in the event of coupling of said charging connector (CNR) to an interface device (DIF) according to one of claims 1 to 6 and coupled to said external electrical equipment (EE), said detection circuit (CD) is capable of detecting the predefined variation of said first voltage and to report this predefined variation detected to said recharge calculator (CA), and in that said recharge calculator (CA) is arranged so as to trigger the supply of said second voltage by said control line (LC) in the event of detection of said type, and to trigger the supply by said power line (LA) of said supply current for said external electrical equipment (EE) in the event of signaling the detection of said predefined variation. System according to claim 7, characterized in that it constitutes a vehicle comprising a powertrain comprising at least one electric driving machine (MME) capable of being supplied with electrical energy by a battery (BR) rechargeable via said charging connector (CNR ). System according to claim 8, characterized in that it constitutes an automobile type vehicle.