FR2974956A1 - Electronic device for use as e.g. 12-volt battery charger in car, has control and regulation units for controlling opening and closing of MOSFETs based on given cyclic ratio, and for operating device as voltage booster or voltage converter - Google Patents

Abstract

The device (5) has two basic cells (6, 7) respectively comprising first MOSFETs (K12, K22) placed between an input terminal (E) and second MOSFETs (X'1, X'2), and third MOSFETs (X1, X2) placed between the second MOSFETs and inductors (L1, L2). Electrical conductors (67, 77) are connected to the respective cells, and connect the device to a domestic alternating current (AC) network. Control and regulation units (100, 200) control opening and closing of the MOSFETs based on a given cyclic ratio, and operate the device as a direct current (DC)-DC voltage booster or AC-DC voltage converter. The booster provides high DC voltage at an output terminal (S) relative to the input terminal, and the converter converts AC voltage from the network into DC voltage. An independent claim is also included for an electrical architecture.

Description

Electronic device, electrical architecture and motor vehicle comprising such a device.

TECHNICAL FIELD OF THE INVENTION The present invention relates to an electronic device allowing in a common electronic scheme to group together a DC voltage regulator and an AC / DC voltage converter. The invention also relates to an electrical architecture and a vehicle comprising such an electronic device.

BACKGROUND ART Conventionally, the electrical architecture of a motor vehicle comprises an alternator, a battery, a starter and an onboard network. The alternator ensures the production of electrical energy by transforming mechanical energy into electrical energy. The alternator is for example formed by a polyphase rotary synchronous type electrical machine. The battery ensures the storage of a portion of the electrical energy produced by the alternator. In addition to the alternator, the electrical circuit comprises a rectifier for converting the alternating current produced by the alternator into direct current used by the onboard network and storable by the battery. The rectifier is most often integrated into the alternator which thus delivers a direct current. The starter converts electrical energy that it takes into the battery mechanical energy for starting a thermal engine of the vehicle. The functions of starter and alternator can be grouped together in the same electrical machine called alternator-starter. The onboard network includes all the consumers of electrical energy of the vehicle such as, in particular, the vehicle lighting, an air conditioning unit of the vehicle cabin and an on-board computer for managing the engine.

The starter, allowing the engine to start, requires a large amount of energy for its operation. During the first start, most of the vehicle's electrical consumers are normally at a standstill.

Certain motor vehicles are equipped with a function well known in the English literature under the name STOP and START thanks to which the engine stops when the vehicle is stopped and restarts, for example, as soon as the driver accelerates again. During a restart, the equipment of the onboard network such as for example the power steering, the lighting system, the audio-visual system of the vehicle, may be active, and must remain so for the comfort and safety of the occupants of the vehicle.

However, the high current consumption of the starter can generate significant voltage drops in the on-board network and degrade certain services requiring electrical energy including a minimum voltage. This creates a perception of non-quality of the entire vehicle, with a defect felt as random because the vehicle user does not necessarily associate the restart of the vehicle engine with this defect, especially since the driver has not not expressly ordered the engine stop.

To overcome this problem, some vehicles have been equipped with a network voltage maintenance device, also known by the abbreviation DMTR, mounted in series with the battery. The DMTR is in fact a DC-DC voltage converter electronic device through which the undervoltage sensitive devices are powered at least during the restart phases. The DMTR then takes its energy from the battery and raises the voltage at the battery terminals to supply power to the onboard network.

The DMTR can perform this function of voltage booster of the electric machine to recharge the battery. The DMTR is then a bidirectional or reversible direct-DC voltage converter that can, in one direction, raise the voltage taken from the battery to supply the on-board power supply and in the other direction raise the voltage taken from the onboard network on which is connected the electric machine to recharge the battery. The patent application filed by the applicant under the number FR1150072 (not yet published) is known, an electronic architecture of such a device. This device then makes it possible to optimize the energy management when the vehicle is in operation in order to increase the gains in fuel consumption and thus to reduce the carbon dioxide emissions.

Furthermore, it is known from the patent application filed by the applicant under No. FR1057784 (not yet published), a charging system for using the home network (which classically delivers in France a voltage of 230V) to recharge. battery. The charging system comprises a charger connected on the one hand to the low-voltage vehicle network (typically 12V) powered by a starter battery and on the other hand to an electrical connector adapted to allow the electrical connection to the home network. The electricity of the domestic network being produced in a less polluting way than the electricity produced by the motor vehicle, it allows, even taking into account the production of the electricity of the domestic network to reduce the emissions of carbon dioxide. In addition, a battery charged by an external electric source such as the electrical network, can be charged to 100%, which is not possible when the load is carried by the alternator of the vehicle. This recharging performed when the vehicle is stationary also increases the gains in fuel consumption of the vehicle due to optimized management of its electrical energy.

However, the fact of having in a vehicle an electronic device DC / DC voltage booster and a battery charger for using the home network to recharge a battery causes integration difficulties, which increases the overall cost as well as the physical volume of the resulting set.

The invention therefore aims at proposing a new electronic device that is both a DC / DC voltage booster and a battery charger making it possible to use the home network to recharge, this in a common and integrated electronic scheme.

The invention thus relates to an electronic device comprising: an input terminal and an output terminal intended to be each respectively connected to a branch of an electrical architecture supplied with DC voltage, a first and a second elementary cell arranged in parallel between the input terminal and the output terminal, each elementary cell comprising, connected in series from the input terminal to the output terminal, a second switching switch, an inductor, each elementary cell further comprising a third switching switch connected between the second switching switch and the inductor and a ground, the assembly consisting of the second switch, inductance and the third switch forming a switching elementary voltage-booster type converter, characterized in that each elementary cell further comprises: - a first cut-off switch mounted in series e between the input terminal and the second switching switch, and in that said device further comprises: a first electrical conductor connected to the first elementary cell between its second switching switch and its third switching switch, a second electrical conductor connected to the second elementary cell between its second switching switch and its third switching switch, the two electrical conductors forming an electrical connection intended to be connected to an AC voltage network; means adapted to control the opening and the closing of the switching switches according to a determined duty cycle and configured to drive said DC voltage terminal device of the input terminal relative to the output terminal or AC voltage converter from the DC voltage electrical connection to the input terminal of the device.

In a variant, each elementary cell further comprises: a fourth switching switch connected in series between the inductor and the output terminal; a fifth switching switch connected between the fourth switching switch and the inductor and the ground the assembly consisting of the fourth switch, the inductor and the fifth switch forming another switching elementary voltage-booster type converter, and in that the means are also configured to determine the control of said DC voltage booster device of the output terminal relative to the input terminal.

In another variant, each elementary cell further comprises: a sixth switching interrupter connected in series between the fifth switching switch and the output terminal, and in that the means are also configured to drive said device (5) by AC voltage converter from the DC voltage electrical connection to the output terminal.

In another variant, the electronic device comprises 2n elementary cells, of which n is an integer greater than 1, of which a first half of the elementary cells is connected to the first electrical conductor and a second half of the elementary cells is connected to the second electrical conductor.

In yet another variant, the electronic device comprises at least one additional elementary cell arranged in parallel between the input terminal and the output terminal and not connected to one or the other of the electrical conductors.

Preferably, the elementary cells are identical to each other.

In a variant, the switching switches are MOS-FET transistors.

In another variant, the first and second chopper switches are mounted in series head to tail. In yet another variant, the fourth and the sixth switch are mounted in series head to tail.

The invention also relates to an electrical architecture comprising means for supplying a direct current, means for storing electrical energy, an edge network, in which an electronic device of the invention is connected by the terminal of input to the electrical energy storage means and the output terminal to the on-board network and the means for supplying a direct current and in that it further comprises an electrical connector connected to the electrical connection and adapted to allow the electrical connection of said device to a domestic AC voltage network.

The invention also relates to a motor vehicle comprising an electrical architecture of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS Other features and advantages will appear on reading the following description of a particular embodiment, not limiting of the invention, with reference to the figures in which:

- Figure 1 is a schematic representation of a first embodiment of the electronic device of the invention. FIG. 2 is another schematic representation of the first embodiment of the electronic device of the invention. - Figure 3 is a schematic representation of a second embodiment of the electronic device of the invention.

DETAILED DESCRIPTION FIG. 1 represents an example of an electrical architecture 10 of a motor vehicle comprising means for supplying a direct current, such as for example an alternator 3, motor vehicle starting means 2, motor vehicle means storage of electrical energy such as a battery 1 and an on-board network 4 supplied with direct current. The on-board network 4 groups electrical components that behave like loads in the vehicle and tolerate variations in supply voltage within a certain range.

The alternator 3 delivers a direct current. For this purpose, it comprises rectifying means. The alternator 3 is electrically connected to the on-board network 4. The electrical energy storage means 1 are electrically connected to the starting means 2.

The electrical architecture 10 shown in FIG. 1 comprises an electronic device of the invention according to a first exemplary embodiment.

The electronic device comprises an electrical input terminal E and an electrical output terminal S. The electronic device 5 is connected in the electrical architecture 10 between a first electrical branch b12 of the electrical architecture comprising the battery 1 and the means 2 and a second electric branch b34 of the electrical architecture comprising the alternator 3 and the edge network 4. Thus the first branch b12 of the electrical architecture 10 is electrically connected to the input terminal E and the second branch b2 of the electrical architecture comprising the electrical energy store 34 is electrically connected to the output terminal S.

In a first preferred exemplary embodiment illustrated in FIG. 1, the electronic device comprises a first and a second elementary cell 6, 7 arranged in parallel between the input terminal E and the output terminal S.

In FIG. 1, in order to clearly indicate the orientation of the transistors used, letters s and d respectively denote the drain and the source of each transistor.

In each elementary cell 6, 7, the input terminals E and output S are connected together by a branch comprising the following components, connected in series, in the following order considered from the input terminal E to the terminal S output:

a first transistor K11, K21, for example p-channel MOS-FET (P-MOS), connected by its source s to the input terminal E. This first transistor K11, K21 comprises a structure diode 61, 71 placed in parallel with the switching switch formed by the first transistor K11, K21 and oriented in the direction from the input terminal E to the output terminal S. a second transistor X'1, X'2, for example also MOS-FET p-channel (P-MOS), connected by its drain d to the drain d of the first transistor K11, K21. This second transistor X'1, X'2 comprises a structure diode 62, 72 placed in parallel with the switching switch constituted by this second transistor X'1, X'2 and oriented in the direction of the output terminal. S, to the input terminal E. Thus, in this arrangement, the first and the second transistor, respectively K11, X'1 for the first elementary cell 6 and K21, X'2 for the second elementary cell 7 are mounted "head -beach ". An inductance L1, L2 connected to the source s of the second transistor X'1, X'2.

A fourth transistor T'1, T'2, for example also p-channel MOS-FET (P-MOS), connected by its source s to the inductor L1, L2. This fourth transistor comprises a structure diode 63, 73 placed in parallel with the switching switch constituted by this fourth transistor T'1, T'2 and oriented in the direction from the input terminal E to the output terminal S.

A sixth transistor K12, K22, for example also p-channel MOS-FET (P-MOS), connected by its drain d to the drain d of the third transistor T'1, T'2. This sixth transistor K12, K22 comprises a structure diode 64, 74 placed in parallel with the switching switch constituted by this sixth transistor K12, K22 and oriented in the direction from the output terminal S to the input terminal E Thus, in this exemplary embodiment, the fourth and sixth transistors, respectively T'1, K12, for the first elementary cell 6 and T'2, K22 for the second elementary cell 7 are mounted "head to tail".

Each elementary cell 6, 7 further comprises: A third transistor X1, X2, for example also p-channel MOS-FET (P-MOS), connected by its drain d to a node J, H located between the second transistor X'1 , X'2 and the inductance L1, L2 and its source s to a ground M. This third transistor X1, X2 comprises a structure diode 65, 75 placed in parallel with the switching switch constituted by this third transistor X1 , X2, and oriented in the direction from the mass M to the node J, H. A fifth transistor T1, T2, for example also MOS-FET p-channel (P-MOS), connected by its drain d to a node F, G located between the inductance L1, L2 and the fourth transistor T'1, T'2, and its source s to a ground M. This fifth transistor Ti, T2, comprises a diode of structure 66, 76, placed in parallel with the switching switch constituted by this fifth transistor T1, T2, and oriented in the direction from the mass M to the node F, G.

The assembly composed of the second switching switch X'1, X'2, the inductor L1, L2 and the third switching switch X1, X2 form a switching elementary voltage-booster type converter. Similarly, the assembly consisting of the fourth switching switch T'1, T'2, the inductor L1, L2 and the fifth switching switch Ti, T2 forms another switching elementary voltage-booster type converter.

The device 5 comprises a first electrical conductor 67 connected to the first elementary cell 6 by a node R located between the second transistor X'1 and the connection node J of the third transistor X1. The device 5 further comprises a second electrical conductor 77 connected to the second elementary cell 7 by a node D located between the second transistor X'2 and the connection node H of the third transistor X2.

The two electrical conductors 67, 77 form an electrical connection intended to be electrically connected to an electrical connector 11, itself adapted to allow the electrical connection of the device 5 to a home network (not shown), typically alternating voltage AC voltage. 230 V. When the electrical connector 11 is connected to the home network, the two electrical conductors 67, 77 allow the flow of domestic current to the electronic device 5.

The device 5 may comprise a first filter capacitor C1 electrically connected between the output terminal S and the ground M, the function of which is to stabilize the voltage VS at the output S of the device 5. It is also possible to provide a second C2 filter capacitor electrically connected between the input terminal E and the mass M whose function is to ensure the stabilization of the VE input voltage E of the device 5.

The electronic device 5 also comprises control means 100 of the switching switches constituted by the transistors. The control means 100 are themselves controlled by regulation means 200 configured to select a switching mode of the switches constituted by the transistors of the electronic device 5.

The regulating means 200 may furthermore comprise means for acquiring and processing measurement of electrical information internal to the electronic device 5. This internal electrical information is, for example, voltage and / or current measurements taken from the device 5 such as the voltage, VE, at the input terminal E, or the voltage VS, at the output terminal S, the currents flowing through the switching switches constituted by the transistors of the device 5.

The control means 200 may furthermore comprise second means for acquiring and processing information external to the device 5. This external information indicates, for example, a vehicle life situation such as a starting or restarting of the vehicle, a deceleration information ....

The regulation means 200 are configured to determine, according to the internal information and, if appropriate, external information, a predefined switching mode of the device 5 among a set of possible switching mode and to act via the control means on the open or closed state of the switching switches constituted by the transistors.

The regulation means 200 may further comprise means for determining and transmitting a diagnostic signal. In this case, the regulation means 200 are also configured to determine, as a function of the internal information and, where appropriate, external information, a diagnostic signal, for example a signal indicating a fault or a malfunction of the device 5. This signal can be emitted destination for example a motor control unit of the vehicle.

The various possible switching modes of the electronic device 5 are as follows (these different switching modes can be associated with vehicle life situations): In a first switching mode, called open mode, all the switches constituted by the transistors are open, and the device 5 therefore also acts as an open switch.

This switching mode can be implemented in a rolling vehicle during a so-called "voltage balance" situation or during a prolonged parking phase. In this situation, the part of the electrical architecture comprising the battery 1 and the starter 2 is electrically cut off from the part of the electrical architecture comprising the alternator 3 and the on-board network 4. The alternator 3 provides power This phase is advantageous in order to keep the state of charge of the battery in a stable state, during the driving or the parking of the vehicle. In a second mode of switching, said mode passing or "bypass", the switching switches constituted by the transistors K11, X'1, T'1, K12 of the first elementary cell 6 as well as the switching switches constituted by the transistors K21, X'2, T 2, K22 of the second elementary cells 7 are closed while the switching switches constituted by the transistors X1, T1 of the first elementary cell 6 as well as the switching switches constituted by the transistors X2, T2 of the second elementary cell 7 are open.

In this situation, the part of the electrical architecture of the vehicle comprising the battery 1 and the starter 2 is electrically connected to the part of the electrical architecture comprising the alternator 3 and the on-board network 4. The alternator 3 and the battery 1 can together provide the power supply of the onboard network 4. This switching mode can be implemented rolling vehicle, during a situation of sudden current draw in the on-board network 4, because of the ignition This abrupt current draw has the effect of lowering the voltage at the terminals of the on-board electrical system 4. In this situation, the alternator 3 is in operation and this fourth switching mode enables therefore a joint power supply of the onboard network 4 by the alternator 3 and the battery 1.

This switching mode can also be implemented rolling vehicle during a situation known as "spinning not supported". In this situation, the onboard network 4 consumes little energy and is preferably drawn from the battery 1. This switching mode can still be implemented vehicle at a standstill. In this case, the alternator 3 is not in operation and the edge network 4 is powered by the battery 1.

In a third switching mode, the electronic device 5 operates as DC / DC voltage booster of the direct voltage VS at the output terminal S with respect to the DC voltage VE at the input terminal E (ie VS> VE ) in other words by voltage booster branch b34 of the electrical architecture comprising the edge network 4 and the alternator 3 relative to the branch b12 comprising the battery 1 and the starter 2. In this third mode of switching, the first and fourth chopper switches constituted by the transistors K11, K12 of the first elementary cell 6 as well as the first and fourth chopper switches constituted by the transistors K21, K22 of the second elementary cell 7 are closed. The second switches constituted by the transistors X'1, X'2 of the two elementary cells 6, 7 are closed. The fifth switches constituted by the transistors X1, X2 of the two elementary cells 6, 7 are open. The fourth switching switches constituted by the transistors T'1, T'2 and the sixth switching switches constituted by the transistors Ti, Ti are alternately open and closed according to a high-frequency cutting. More specifically, taking for example the first elementary cell 6, during a period of time, in a first part of the period, the switch Ti is closed and the switch T'l is open. In a second part of the period, forming the complement of the period, the switch Ti is open and the switch T'l is closed. The time ratio between the two periods or duty cycle is determined by the regulating means 200 to determine the desired voltage rise. This type of cutting is well known in the English literature under the acronym PWM for "Pulse With Modulation". This type of cutting is also called pulse width cutting. It is possible to interleave the cuts made in the different elementary cells 6, 7 to better smooth the output voltage V.

This switching mode can be implemented during a vehicle start operation. Indeed in this situation, due to the intense current draw by the starter 2, the voltage across the battery 1 drops from its nominal voltage, for example 12.5 V to a lower voltage, for example lower at 10V, which is not compatible with the correct operation of the electrical consumers of the on-board network 4, this voltage drop of the on-board network is then compensated by activating the electronic device 5 according to this third switching mode. The voltage maintaining device 5 then raises the voltage of the output terminal S with respect to the input terminal E so as to allow the correct operation of the electrical consumers of said edge network 4.

This first switching mode can also be implemented rolling vehicle during a situation called "sustained spinning", which corresponds to a situation where due to a battery discharge 1, the voltage across the battery 1 s it lowers to a voltage value which is not compatible with the correct operation of the electrical consumers of the on-board network 4. This voltage drop of the on-board electrical system is compensated by the activation of the device 5 according to this first switching mode. The voltage maintaining device 5 then raises the voltage of the output terminal S with respect to the input terminal, and therefore that of the edge network 4 so as to allow the correct operation of the electrical consumers of said edge network 4. In a fourth switching mode, the device 5 operates as DC / DC voltage booster, DC voltage, VE to the input terminal E with respect to the DC voltage VS at the output terminal S (ie VE> VS) in other words voltage booster of the branch b12 comprising the battery 1 and the starter 2 relative to the branch b34 of the electrical architecture comprising the edge network 4 and the alternator 3. In this fourth switching mode, the first and fourth chopper switches constituted by the transistors K11, K12 of the first elementary cell 6 as well as the first and fourth chopper switches constituted by the transistors K21, K22 of the second elementary cell 7 are closed. The fourth switching switches constituted by the transistors T'1, T'2 of the two elementary cells 6, 7 are closed. The sixth switching switches constituted by the transistors T1, T2 of the two elementary cells 6, 7 are open. The second switching switches formed by the transistors X'1, X'2 and the fifth switching switches constituted by the transistors X1, X2 are alternately open and closed according to a high-frequency cutting. More specifically, taking as an example the first elementary cell 6, during a period of time, in a first part of the period, the switch X1 is closed and the switch X'1 is open. In a second part of the period, forming the complement of the period, the switch Xl is open and the switch X'1 is closed. The time ratio between the two periods or duty cycle is determined by the regulating means 200 to determine the desired voltage rise.

This switching mode can be implemented when the vehicle is traveling and the regulation means 200 decide to force-charge the battery 1. In this situation, while the on-board network 4 is sufficiently supplied with voltage, for example example at a voltage between 12.5V and 13.3V, to allow proper operation of the electrical consumers of said network, by activating the electronic device 5 according to this switching mode, the electronic device 5 then raises the voltage of the terminal E specifically with respect to the output terminal S. More specifically, the voltage across the battery 1 is raised to a voltage value, for example 16V, greater than its nominal voltage, allowing forced charging of the battery 1 and thus the energy storage recovered in electrical form.

This switching mode can also be used as a rolling vehicle, in a phase of energy recovery, in other words a vehicle life phase for which energy recovery by recharging the battery 1 is interesting for the energy balance of the vehicle. vehicle. An example of a recovery phase is a so-called decelerating phase by lifting the foot, that is to say by releasing the accelerator pedal of the vehicle. In this case, in the event of detection by the regulation means 200 of a deceleration phase by lifting of the foot, they decide to operate a forced recharge of the battery 1 by activating the electronic device 5 according to this fourth mode of switching which then raises the voltage of the input terminal E with respect to the output terminal S.

In the elementary cell, the "head-to-toe" assembly of the first and second cut-out switches as well as the "head-to-toe" assembly of the fourth and sixth cut-out switches make it possible to avoid the natural circulation of the current from 230V to ground M By thus disposing these switching switches, the current is blocked naturally without it being necessary to control them.

Two other switching modes are possible and are relevant when the device 5 is connected to a domestic AC voltage network VR. FIG. 2 is a diagram of FIG. 1 showing the components of the device so as to show better two electronic assemblies 20, 21 representing two AC / DC voltage converters also called controlled rectifiers. Thanks to these two converters we can supply the on-board network 4 and the battery 1 under two voltages and therefore two different currents, which allows us to be able to vary the voltage across the battery 1 in order to charge more or less quickly while preserving the voltage quality of the onboard network 4.

In the resting phase, for example when the vehicle is parked and is connected to a domestic socket, the domestic electrical network supplies the electronic device 5 with AC voltage VR which is converted into DC voltage VS for the on-board network 4 and recharges the battery 1 thanks to two independent and regulated voltages. The two other switching modes are therefore: In a fifth switching mode, the device 5 operates as an AC / DC voltage converter from the AC voltage VR to the DC voltage VE to the input terminal E. In this fifth mode switching, the second switching switch constituted by the transistor X'1 of the first elementary cell 6 and the second switching switch constituted by the transistor X'2 of the second elementary cell 7 are closed. The first switching switches formed by the transistors K11, K21 and the fifth switching switches formed by the transistors X1, X2 are alternately open and closed according to a high frequency cutting. The time ratio between the two periods or duty cycle is determined by the regulating means 200 to determine the desired DC voltage VE.

In a sixth switching mode, the device 5 operates as an AC / DC voltage converter from the AC voltage VR to the DC voltage and / or the AC voltage VR to the DC voltage VS to the output terminal S. In this case, sixth switching mode, the fourth switching switch consisting of the transistor T'1 of the first elementary cell 6 and the second switching switch constituted by the transistor T'2 of the second elementary cell 7 are closed. The fourth switching switches constituted by the transistors K12, K22 and the sixth switching switches constituted by the transistors T1, T2 are alternately open and closed according to a high frequency cutting, the time ratio between the two periods or duty cycle being determined by the control means 200 to determine the desired DC voltage VS.

The fifth and sixth switching modes can also be activated simultaneously, that is, to provide both a DC voltage at the output terminal S and the input terminal E.

Figure 3 shows a second embodiment of the invention. In this second example, the electronic device comprises 2n elementary cells, of which n is an integer greater than 1, in this case in FIG. 3 four elementary cells 30, 31, 32, 33 arranged in parallel between the terminal of input E and the output terminal S. The elementary cells 30, 31, 32, 33 are similar to the elementary cells 6,7 shown in the first example and in FIG.

In this second embodiment:

-A first half of the elementary cells of the electronic device 5, that is to say in Figure 3 the elementary cells 30, 32, is connected to the first electrical conductor 67 of the electrical connection by a node R located between the second switch switching device consisting of the transistor X'1 and the connection node J of the third switching switch consisting of the transistor X1. The other half of the elementary cells of the electronic device 5, that is to say in FIG. 3, the elementary cells 31, 32 are connected to the second electrical conductor 77 of the electrical connection by a node D located between the second switch switching device consisting of the transistor X'2 and the connection node H of the third switching switch consisting of the transistor X2.

This configuration makes it possible to multiply the number of elementary cell pairs to reduce the current constraints on the components of the elementary cells of the electronic device and to improve the quality of voltage generated since the oscillation of the voltage is reduced.

In another embodiment not shown, the electronic device may comprise:

an even set of elementary cells arranged in parallel between the input terminal E and the output terminal S, with one half of this even set of elementary cells connected to the first electrical conductors 67 and the other half of this even set of elementary cells connected to the second electrical conductors 77, and furthermore

at least one additional elementary cell arranged in parallel between the input terminal E and the output terminal S and not connected to one or the other of the electrical conductors 67, 77. By taking again FIG. 3, this variant would come back to have for example the elementary cells 30 and 31 connected to the electrical connections 67, 77 and the elementary cells 32, 33 not connected to the electrical connections 67, 77.

Without departing from the scope of the invention, the electronic device may be in the form of other exemplary embodiments with simplified functions in relation to the three preceding embodiments:

An alternative embodiment with simplified functions differs from the previous embodiments described in that it does not have switching switches between the inductors L1, L2 and the output terminal S. In this embodiment, the electronic device 5 therefore does not include a voltage booster to the output terminal S nor a second controlled rectifier 21.

Another embodiment with simplified functions differs from the previous embodiments described in that it does not have a sixth switching switch K12,20 K22. In this embodiment, the electronic device 5 does not therefore comprise a second controlled rectifier 21.

In alternative embodiments of the described embodiments, the P-MOS type transistors may be replaced by N-MOS homologous transistors. It is also possible to use IGBT transistors instead of MOSFETs.

Preferably, for all the exemplary embodiments, the elementary cells are identical to each other, which facilitates the control of the device as a whole.

The invention makes it possible in a common electronic scheme to group together a DC voltage regulation device and an AC / DC voltage converter, which enables us to have in particular a 12V battery charger. The invention thus makes it possible to reduce the number of components used for the two functions performed, which makes it possible to reduce the overall cost of the device, as well as the physical volume of the resulting electronic device.

Claims (11)

REVENDICATIONS1. Electronic device (5) comprising: an input terminal (E) and an output terminal (S) intended to be respectively connected to a branch of an electrical architecture supplied with DC voltage, a first and a second cell; element (6,7) arranged in parallel between the input terminal (E) and the output terminal (S), each elementary cell (6,7) comprising, connected in series from the input terminal (E) to the output terminal (S), a second switching switch (X'1, X'2), an inductor (L1, L2), each elementary cell (6, 7) further comprising a third switching switch (X1, X2) connected between the second switching switch (X'1, X'2) and the inductance (L1, L2) and a ground (M), the set consisting of the second switch (X'1, X'2) , of inductance (L1, L2) and of the third switch (X1, X2) forming a switching elementary voltage-booster type converter, characterized in that each elementary ellule (6,7) further comprises: - a first switching switch (K12, K22) connected in series between the input terminal (E) and the second switching switch (X'1, X'2), and in that said device (5) further comprises: a first electrical conductor (67) connected to the first elementary cell (6) between its second switching switch (X'1) and its third switching switch (X1), a second electrical conductor (77) connected to the second elementary cell (7) between its second switching switch (X'2) and its third switching switch (X2), the two electrical conductors (67, 77) forming a connection electrical connector intended to be connected to an AC voltage network; means (100, 200) adapted to control the opening and closing of the switching switches (K12, K22, X'1, X'2, X1, X2) according to a determined duty cycle and configured to drive said device (5) in DC voltage regulator of the input terminal (E) relative to the output terminal (S) or alternating voltage converter from the DC voltage electrical connection to the input terminal (E) of the device (5) ). 2. Electronic device (5) according to claim 1, characterized in that each elementary cell (6, 7) further comprises: a fourth switching switch (T'1, T'2) connected in series between the inductor (L1, L2) and the output terminal (S), -a fifth switching switch (Ti, T2) connected between the fourth switching switch (T'1, T'2) and the inductor (L1, L2) and the mass (M), the set composed of the fourth switch (T'1, T'2), the inductance (L1, L2) and the fifth switch (T1, T2) forming another elementary switching converter. voltage-boosting type, and in that the means (100, 200) are also configured to determine the control of said DC voltage terminal device (5) of the output terminal (S) relative to the input terminal (E ). 3. Electronic device (5) according to claim 2, characterized in that each elementary cell (6, 7) further comprises: a sixth switching switch (K12, K22) connected in series between the fifth switching switch (Ti , T2) and the output terminal (S), and in that the means (100, 200) are also configured to drive said device (5) as an AC voltage converter from the DC voltage electrical connection to the terminal output (S). 4. Electronic device (5) according to one of the preceding claims, characterized in that it comprises 2n elementary cells (30, 31, 32, 33), where n is an integer greater than 1, of which a first half of elementary cells (30, 32) is connected to the first electrical conductor (67) and a second half of the elementary cells (31, 33) is connected to the second electrical conductor (77). 5. Electronic device (5) according to one of the preceding claims, characterized in that it comprises at least one additional elementary cell arranged in parallel between the input terminal (E) and the output terminal (S) and not connected to one or the other of the electrical conductors (67, 77). 6. Electronic device (5) according to one of the preceding claims, characterized in that the elementary cells (6, 7, 30, 31, 32, 33) are identical to each other. 7. Electronic device (5) according to one of the preceding claims, characterized in that the switching switches (K12, K22, X'1, X'2, X1, X2, T'1, T'2, Ti, T2, K12, K22) are MOS-FET transistors. 8. Electronic device (5) according to one of the preceding claims, characterized in that the first and the second switching switch (K11, K21, X'1, X'2) are mounted in series head to tail. 9. Electronic device (5) according to one of the preceding claims, claim 3 being applied, characterized in that the fourth and the sixth switching switch (T'1, T'2, K12, K22) are mounted in series head to tail. 10. Electrical architecture (10) comprising means for supplying a direct current (3), means for storing electrical energy (1), an edge network (4), characterized in that it comprises a device electronics (5) according to any one of the preceding claims connected by the input terminal (E) to the electrical energy storage means (1) and the output terminal (S) to the on-board network (4) and the means for supplying a direct current (3) and in that it further comprises an electrical connector (11) connected to the electrical connection and adapted to allow the electrical connection of said device to a domestic AC voltage network. Motor vehicle comprising an electrical architecture (10) according to claim 10.