WO2023057329A1 - Système électrique pour véhicule automobile - Google Patents
Système électrique pour véhicule automobile Download PDFInfo
- Publication number
- WO2023057329A1 WO2023057329A1 PCT/EP2022/077273 EP2022077273W WO2023057329A1 WO 2023057329 A1 WO2023057329 A1 WO 2023057329A1 EP 2022077273 W EP2022077273 W EP 2022077273W WO 2023057329 A1 WO2023057329 A1 WO 2023057329A1
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- WO
- WIPO (PCT)
- Prior art keywords
- bridge
- switch
- control signal
- voltage
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33571—Half-bridge at primary side of an isolation transformer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
- B60L53/22—Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/01—Resonant DC/DC converters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2260/00—Operating Modes
- B60L2260/10—Temporary overload
- B60L2260/16—Temporary overload of electrical drive trains
- B60L2260/165—Temporary overload of electrical drive trains of converters
Definitions
- TITLE Motor Vehicle Electrical System
- the invention relates to the field of electric or hybrid vehicles and more specifically electric systems for electric or hybrid vehicles, comprising an on-board charger and a microcontroller, and the method implemented by said electric system.
- an electric or hybrid vehicle comprises a battery capable of supplying electrical energy in order to supply electrical equipment, mounted in the vehicle or external to the vehicle, and the electrical machine of the vehicle.
- the vehicle also includes an on-board charger, better known as OBC for "On Board Charger" in English, connected to the battery.
- OBC On Board Charger
- the on-board charger converts the direct voltage supplied by the battery into an alternating voltage in order to supply the electrical equipment to which it is connected.
- the on-board charger can also be connected to an electrical supply network and in this case makes it possible to convert the alternating voltage supplied by the network into direct voltage in order to recharge the battery.
- an on-board charger comprises a power factor corrector circuit, known under the name "PFC” for "Power Factor Corrector” in English, a direct-direct current converter, a connecting capacitor connected in parallel between the power factor correction circuit and the current converter and a microcontroller capable of controlling the power factor correction circuit.
- PFC power factor corrector circuit
- PFC Power Factor Corrector
- the power factor corrector when the battery is charging, is the element of the on-board charger capable of converting an alternating voltage, supplied by an electrical network external to the vehicle, into a direct voltage defined between 400 and 800 V
- the link capacitance makes it possible to suppress the residual oscillations of the DC voltage supplied by the power factor correction circuit.
- the DC-DC converter is then capable of converting the DC voltage smoothed by the capacitor, into another DC voltage value, between 200 and 400 V approximately capable of charging the battery.
- the microcontroller is in particular capable of controlling the power factor correction circuit.
- the microcontroller controls the corrector circuit in order to define the value of the DC voltage supplied by the corrector circuit and defined between 400 and 800 V according to the state of charge of the battery.
- connection capacitor must be adapted to withstand high voltages ranging from 400 to 800 V.
- the more the capacitor is adapted to withstand high voltages the more expensive and cumbersome it is.
- the various electronic components of the power factor correction circuit and of the DC-DC converter must also be adapted to withstand voltages of up to 800 V, so as not to be damaged.
- the invention relates to an electrical system for a motor vehicle, the vehicle comprising at least one supply battery, the electrical system comprising an electric charger, intended to be connected on the one hand to said battery and to on the other hand to an electrical network external to the vehicle supplying an alternating voltage or to electrical equipment, and a microcontroller, the charger being able to charge the battery from an external electrical network or to allow the battery to supply said equipment, the charger comprising a: a. a power factor correction circuit, capable of converting an alternating voltage into a direct voltage and vice versa, b.
- a DC-DC voltage converter connected between the power factor corrector circuit and the battery and capable of converting a DC voltage into another DC voltage
- said DC-DC voltage converter comprising a first H bridge, and a second H-bridge, each H-bridge comprising four switches, a first switch being connected between a high point and a midpoint, a second switch being linked between the midpoint and a low point, a third switch being linked between the high point and a second midpoint and a fourth switch being linked between the second midpoint and the low point
- the voltage converter also comprising a transformer electrically connecting the first H-bridge and the second H-bridge, each H-bridge being capable of operating according to: i.
- the microcontroller is configured to: a.
- a first range of frequencies defines the set of frequencies of the control signal for which the first bridge or the second bridge operates according to the first operating mode and a second range of frequencies defines the set of frequencies of the control signal for which the first bridge or the second bridge operates according to the second operating mode, b. activate the second operating mode of the first bridge or the second bridge by transmitting: i. an open command signal to the third switch, ii.
- a close command signal to the fourth switch iii. a control signal to the first switch and to the second switch for a predetermined duration, the frequency of each control signal being equal to the maximum value of the second range of frequencies, over a predetermined duration
- the power variation function is ensured by the converter controlled by the microcontroller.
- the fact of imposing, for a predetermined period of time, the frequency of the control signal at the highest frequency of the first or second range of frequencies, then of applying the reference frequency allows the DC-DC voltage converter to reach the desired frequency more quickly. This therefore allows the DC-DC voltage converter to be more responsive to rapid variations in power demands and avoids large variations in the voltage of the link capacitor. In this way, this protects the electronic components of the on-board charger from overvoltage and overheating problems in said on-board charger.
- the on-board charger comprises a connection capacitor connected in parallel between the power factor corrector circuit and the DC-DC voltage converter, able to attenuate the residual oscillations of the voltage supplied between the factor corrector circuit power supply and the DC-DC voltage converter,
- connection capacitor does not vary or varies little.
- the nominal voltage of the connection capacitor is chosen to be relatively close to and at least slightly higher than the value of the voltage applied to the terminals of said capacitor. In this way, the capacity charges and discharges completely.
- the DC voltage at the capacitor terminals is approximately 400 V at the capacitor terminals. It is therefore possible to choose a link capacitor with a nominal value slightly greater than 400 V. Capacitors for these nominal values are relatively compact and do not overheat.
- the converter comprises: To. a transformer comprising a primary winding and a secondary winding, each winding comprising a first terminal and a second terminal, b. a first resonant circuit comprising a resonant capacitance and a coil connected in series, the resonant capacitance of the first resonant circuit being electrically connected to the first midpoint of the first bridge, and the coil of the first resonant circuit being electrically connected to the first terminal of the transformer primary winding, c.
- a second resonant circuit comprising a resonant capacitor and a coil connected in series, the resonant capacitor of the second resonant circuit being electrically connected to the first midpoint of the second bridge, and the coil of the second resonant circuit being electrically connected to the first terminal of the secondary winding of the transformer.
- the converter comprises an additional coil, connected in parallel with the primary winding of the transformer.
- the additional coil can be internal or external to the transformer.
- the converter corresponds to a CLLLC type resonant DC-DC voltage converter.
- each switch designates a MOSFET or bipolar transistor.
- the invention also relates to a motor vehicle comprising at least one battery and at least one electrical system as presented above.
- the invention also relates to a method for activating an operating mode of the first bridge or of the second bridge of an electronic system converter for a motor vehicle, as presented above, said method being implemented by the microcontroller, when the first operating mode of the first bridge, respectively of the second bridge, is activated, the method comprising the steps: a. detection of a request for activation of the second operating mode of the first bridge, respectively of the second bridge, b. receiving at least one frequency instruction, c. after detection of the request for activation of the second mode of operation and reception of at least one frequency instruction, activation of the second mode of operation of the first bridge, respectively of the second bridge, in which the microcontroller transmits: i. an open command signal to the third switch, ii.
- a close command signal to the fourth switch iii. a control signal to the first switch and to the second switch for a predetermined duration, the frequency of each control signal being equal to the maximum value of the second range of frequencies, over a predetermined duration, d. applying the frequency received to the control signal transmitted to the first switch and to the second switch of the first bridge, respectively to the second bridge, when the predetermined duration has elapsed.
- the method comprising the steps: a. detection of a request for activation of the first mode of operation of the first bridge, respectively of the second bridge, b. receiving at least one frequency instruction, c. after detection of the request for activation of the first mode of operation and reception of at least one frequency instruction, activation of the first mode of operation of the first bridge, respectively of the second bridge, in which the microcontroller emits a commands each switch of the first bridge, respectively of the second bridge, the frequency of each control signal emitted being equal to the maximum value of the first range of frequencies over a predetermined duration, d. application of the received frequency to each control signal transmitted to the switches of the first bridge, respectively of the second bridge, when the predetermined duration has elapsed.
- the invention also relates to a computer program product remarkable in that it comprises a set of program code instructions which, when they are executed by one or more processors, configure the processor or processors to put implement a method as presented previously.
- FIG. 1 Figure 1 schematically illustrates the electrical system according to the invention
- Figure 2 shows the electronic circuit of the charger converter of the electrical system according to Figure 1
- FIG. 3 Figure 3 schematically illustrates the method according to the invention.
- the vehicle is in particular an electric or hybrid vehicle and comprises in particular an electric machine capable of converting electrical energy into mechanical energy in order to drive the wheels of the vehicle in rotation.
- the electric machine therefore corresponds to the electric propulsion motor of the vehicle.
- the vehicle also includes a power supply battery 10 and an electrical system including an on-board charger 20 and a microcontroller 40.
- the power supply battery 10 is in particular capable of operating in a discharge mode, in which the battery 10 supplies energy to equipment mounted in the vehicle or other equipment external to the vehicles that would be connected to the battery 10 or the electric machine,.
- Battery 10 is also capable of operating in a charging mode, in which battery 10 is capable of charging from the electrical energy supplied by an electrical network electrically connected to battery 10.
- the voltage of battery 10 can be defined between 400 V or 800 V.
- the charger 20 is connected on the one hand to the battery 10 and on the other hand to at least one equipment mounted in the vehicle or external to the vehicle or to an electrical network capable of supplying an alternating voltage.
- the charger 20 is said to be “bidirectional”. Indeed, when the charger 20 is connected to an electrical network and the battery 10 operates according to the state of charge, the charger 20 is in particular capable of converting the alternating voltage supplied by the electrical network into a direct voltage capable of charging the battery 10. On the other hand, when electrical equipment is connected to the charger 20, the battery 10 operates according to the state of discharge, the charger 20 is capable of converting the direct voltage supplied by the battery 10 into an alternating voltage capable of power the equipment.
- the charger 20 comprises a power factor correction circuit 21, a DC-DC voltage converter 22 and a link capacitor C20.
- Converter 22 is electrically connected to corrector circuit 21 via a wired link.
- link capacitor C20 is connected in shunt to the wired link connecting corrector circuit 21 and converter 22.
- the converter 22 is adapted to be electrically connected to the battery 10 and the power factor corrector circuit 21 is adapted to be electrically connected to equipment of the vehicle or external to the vehicle or to an electrical network.
- the power factor corrector circuit 21 is capable of converting an alternating voltage VAC into a direct voltage VDC2I and vice versa.
- the DC-DC voltage converter 22 is capable of converting a DC voltage VDC22 into another DC voltage V10.
- the conversion ratio between voltage VDC22 and the DC voltage V is variable and in particular defined by a value lying over an interval defined between 0.4 and 1.3.
- connection capacitor C20 is capable of attenuating the residual oscillations of the DC voltage supplied between the power factor corrector circuit 21 and the converter 22 of DC-DC voltage.
- the corrector circuit 21 when the battery 10 operates in charge mode, the corrector circuit 21 is connected to an electrical network.
- the corrector circuit 21 converts the AC voltage supplied by the electrical network into a DC voltage VDC2I defined substantially at 400 V.
- the DC voltage VDC2I has an AC part, in other words the DC voltage VDC2I has residual oscillations, for example at plus or minus 30 V.
- the connection capacitor C20 enables the residual oscillations of the DC voltage VDC2I to be suppressed.
- the converter 22 converts the DC voltage VDC22 without residual oscillations into a DC voltage V10 suitable for recharging the battery 10, for example a DC voltage between 220 V and 465 V.
- the corrector circuit 21 is connected to electronic equipment to be powered.
- the converter 22 converts the DC voltage V10 supplied by the battery 10 into another DC voltage VDC22 for example approximately equal to 400 V.
- the DC voltage VDC22 supplied by the converter 22 has an AC part, in other words the DC voltage VDC22 has oscillations residual voltages, for example at plus or minus 30 V.
- the connection capacitor C20 makes it possible to suppress the residual oscillations of the DC voltage VDC22.
- the corrector circuit 21 converts the direct voltage VDC2I without residual oscillations defined substantially at 400 V into an alternating voltage capable of supplying electrical energy to the equipment connected to said corrector circuit 21.
- the value of the maximum DC voltage applied to the terminals of the connection capacitor C20 is substantially equal to or close to 400 V.
- the nominal voltage of the connection capacitor C20 is chosen according to this DC voltage constraint.
- the connection capacitor C20 has a nominal voltage at least greater than the maximum DC voltage applied to it.
- the connection capacitor C20 has a nominal voltage slightly higher than the maximum DC voltage applied to it.
- the detailed electronic structure of the converter 22 will now be presented.
- the converter 22 corresponds to a resonant DC-DC voltage converter CLLC or CLLCC.
- the converter 22 corresponds to a CLLC resonant DC-DC voltage converter and comprises a transformer Tr, a first H bridge, designated H1 in Figure 2, a second H bridge, designated H2, in FIG. 2, a first resonant circuit CR1 and a second resonant circuit CR2.
- the transformer Tr comprises a primary winding and a secondary winding, each winding comprising a first terminal and a second terminal.
- Each bridge H1, H2 comprises four switches, a first switch T1 being connected between a high point PH and a midpoint PM1, a second switch T2 being connected between the midpoint PM1 and a low point PB, a third switch T3 being connected between the high point PH and a second midpoint PM2 and a fourth switch T4 being connected between the second midpoint PM2 and the low point PB.
- the switches T1, T2, T3, T4 can designate any type of switch, and in particular MOSFET or bipolar transistors.
- the first resonant circuit CR1 comprises a resonant capacitor C1 and a coil L1 connected in series.
- the second resonant circuit CR2 comprises a resonant capacitor C2 and a coil L2 connected in series.
- the resonant capacitor C1 of the first resonant circuit CR1 is electrically connected to the first midpoint PM1 of the first bridge H 1 , and the coil L1 of the first resonant circuit CR1 is electrically connected to the first terminal of the primary winding of the transformer Tr .
- the second terminal of the primary winding of the transformer Tr is electrically connected to the second midpoint PM2 of the first bridge H1.
- the resonant capacitor C2 of the second resonant circuit CR2 is electrically connected to the first midpoint PM1 of the second bridge H2, and the coil L2 of the second resonant circuit CR2 is electrically connected to the first terminal of the secondary winding of the transformer Tr.
- the second terminal of the secondary winding of the transformer Tr is electrically connected to the second midpoint PM2 of the second bridge H2.
- the transformer T r is capable of supplying an output voltage between the terminals of the secondary winding equal to the voltage applied between the terminals of the first winding. This ratio of 1 between the output voltage and the voltage applied between the terminals of the first winding can be modified.
- the converter 22 also includes an additional coil (not shown in the figures) in parallel with the primary winding of the transformer Tr.
- the additional coil may be internal or external to the transformer Tr.
- the converter 22 corresponds to a CLLLC-type resonant DC-DC voltage converter.
- the first bridge H1 is also capable of operating according to a first mode of operation in which the first switch T1 and the fourth switch T4 are opened and closed simultaneously. Moreover, in the first operating mode, the second switch T2 and the third switch T3 are opened and closed simultaneously unlike the first switch T1 and the fourth switch T4.
- the first mode of operation is known to those skilled in the art by the name “Full-Bridge”.
- the first bridge H1 is capable of operating according to a second mode of operation, in which the fourth switch T4 is always closed, the third switch T3 is always open, and the first switch T 1 and the second switch T2 are open alternately.
- the second mode of operation is known to those skilled in the art by the name “Half-Bridge”.
- the second mode of operation makes it possible in particular to reduce the voltage gain of the converter 22 with respect to the voltage gain of the converter 22 when it operates according to the first mode of operation.
- the microcontroller 40 is connected to the charger 20.
- the microcontroller 40 comprises a regulator 30 and more precisely a PID regulator, for “proportional, integral, derivative”.
- the regulator 30 is capable of obtaining the value of the DC voltage V measured between the converter 22 and the battery 10.
- the regulator 30 is able to obtain the value of the voltage VAC measured between the corrector circuit 21 and the electrical equipment (or the electrical network) connected to said corrector circuit 21.
- the regulator 30 is also capable of receiving the voltage setpoint to be applied between the converter 22 and the battery 10 and/or the voltage setpoint to be applied between the corrector circuit 21 and the electrical equipment connected to said corrector circuit 21.
- the regulator 30 is capable of determining whether each measured value corresponds to the received voltage setpoint to be applied.
- the regulator 30 is configured to issue at least one instruction to the microcontroller 40 in order to modify the conversion ratio of the converter 22, so that each value measured corresponds to the corresponding setpoint.
- the instruction sent by the regulator 30 notably comprises a command frequency value.
- the regulator 30 is also capable of measuring the current at the terminals of the battery 10.
- the microcontroller 40 is able to periodically receive the value of the current at the terminals of the battery 10 measured by the regulator 30.
- the microcontroller 40 is capable of controlling the converter 22. More specifically, the microcontroller 40 is capable of controlling the opening and closing of each switch T1, T2, T3, T4 of the first bridge H1 and of the second bridge H2. Thus, the microcontroller 40 is able to control the activation and deactivation of the first mode of operation and the activation and deactivation of the second mode of operation of the first bridge H1 and of the second bridge H2.
- the microcontroller 30 controls the first bridge H1. Conversely, when the battery 10 operates according to the discharge mode, the microcontroller 40 controls the second bridge H2.
- the microcontroller 40 is capable of controlling the opening and closing of each switch T1, T2, T3, T4 of the first bridge H1 and of the second bridge H2, in particular by the method of frequency modulation.
- the microcontroller 40 sends a control signal to each switch T1, T2, T3, T4.
- Each control signal is defined by a periodic square wave signal, the ratio of which cyclic is in particular 50%.
- the control signal relating to a switch T1, T2, T3, T4 alternates between a so-called “high” state making it possible to control the closing of said switch, and a so-called “low” state making it possible to control the opening of said switch. This can also be the reverse case, the high state can control the opening of said switch and the low state can control the closing of said switch.
- Each control signal is therefore characterized by a frequency. More precisely, a first range of frequencies defines the set of frequencies of the control signal (and therefore the set of opening and closing frequencies of the switches T1, T2, T3, T4) for which the first bridge H1 or the second bridge H2 operates according to the first mode of operation. Similarly, a second range of frequencies defines all the frequencies of the control signal (and therefore all the opening and closing frequencies of the switches T1, T2, T3, T4) for which the first bridge H1 or the second bridge H2 operates according to the second mode of operation.
- the microcontroller 40 when the microcontroller 40 activates the first mode of operation, respectively the second mode of operation, of the first bridge H1 or of the second bridge H2, the microcontroller 40 defines the frequency of each control signal emitted to the switches T1, T2, T3, T4 of said bridge by selecting a value from the first, respectively the second, range of frequencies.
- the microcontroller 40 is able to define and/or modify the frequency of each control signal.
- the microcontroller 40 is configured to apply the command frequency included in the instruction sent by the regulator 30, to each command signal, in order to modify the conversion ratio of the converter 22.
- the microcontroller 40 can also control the closing, respectively the opening, constant of a switch T1, T2, T3, T4 by the emission of a closing signal, respectively of opening, to said switch T1, T2, T3, T4.
- the microcontroller 40 includes a processor capable of implementing a set of instructions enabling these functions to be performed.
- the method comprises a first phase P1 called “activation of the second mode of operation”.
- the first phase P1 is described here in the case where the battery 10 operates according to the charging mode and the first bridge H1 operates according to the first operating mode.
- the first phase P1 firstly comprises a step E1 of detecting a request to change the operating mode of the first bridge H1. More precisely, in the present case, during the detection step E1, the microcontroller 40 receives a request to activate the second mode of operation.
- the first phase P1 includes a step E2 for determining an instruction, during which the regulator 30 receives the value of the measured voltage Vio and the voltage setpoint between the battery 10 and the converter 22 and compares the voltage Vw measured and the corresponding setpoint. If the measured voltage V does not correspond to the setpoint, the regulator 30 issues a command frequency instruction.
- the method comprises a step of receiving E3 of at least one command frequency instruction by the microcontroller 40.
- the first phase P1 then comprises an activation step E4 of the second mode of operation, in which the microcontroller 40 activates the second mode of operation of the first bridge H1.
- the microcontroller 40 sends an opening signal to the third switch T3 and a closing signal to the fourth switch T4.
- the microcontroller 40 sends a control signal to the first switch T 1 and to the second switch T2 of the first bridge H1, by defining their frequency so that it is equal to the maximum value of the second range of frequencies over a duration predetermined.
- the maximum frequency value is set between 20 to 30% higher than the frequency instruction received.
- the maximum frequency value is 300 kHz.
- the control signals emitted to the first switch T1 and to the second switch T2 are defined so that the first switch T1 and the second switch T2 open alternately.
- the predetermined duration corresponds in particular to the discharge time of the capacitor C1 of the first resonant circuit CR1 or of the capacitor C2 of the second resonant circuit CR2.
- the first phase P1 comprises a step E5 of defining the frequency received as an instruction to the control signal of the first switch T1 and of the second switch T2 of the first bridge H1.
- the method also includes a second phase P2 called "activation of the first mode of operation".
- the second phase P2 firstly comprises a step of AND detection of a change in operating mode of the first bridge H1. More specifically, in the present case, during the detection step, the microcontroller 40 receives a request to activate the first mode of operation.
- the second phase P2 comprises a step E2′ of determining an instruction and a step E3′ of receiving an instruction as described in the first phase PT
- the second phase P2 then comprises an activation step E4′ of the first mode of operation, in which the microcontroller 30 activates the first mode of operation of the first bridge H1 by transmitting a control signal to each switch T1, T2, T3, T4 of the first bridge H1, and sets the modulation frequency so that it is equal to the maximum value of the first frequency range over a predetermined duration.
- the control signals are defined so that the first switch T1 and the fourth switch T4 are open and closed simultaneously and so that the second switch T2 and the third switch T3 are open and closed simultaneously contrary to the first switch T1 and the fourth switch T4.
- the second phase P2 comprises a step E5′ of applying the frequency received as an instruction to the switches T1, T2, T3, T4 of the first bridge H1.
- the first and the second phase are preferably carried out one after the other in the event of a detected need for a change in the operating mode of the converter 22.
- the method can also be implemented analogously when the battery 10 operates in the discharge mode.
- the signal of command will not be issued to the switches T1, T2, T3, T4 of the first bridge H1, but to the switches T1, T2, T3, T4 of the second bridge H2.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Dc-Dc Converters (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202280067028.XA CN118139763A (zh) | 2021-10-04 | 2022-09-30 | 用于机动车辆的电系统 |
| US18/683,914 US20240356447A1 (en) | 2021-10-04 | 2022-09-30 | Electrical system for a motor vehicle |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2110478A FR3127730A1 (fr) | 2021-10-04 | 2021-10-04 | Système électrique pour véhicule automobile |
| FRFR2110478 | 2021-10-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023057329A1 true WO2023057329A1 (fr) | 2023-04-13 |
Family
ID=78649446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2022/077273 Ceased WO2023057329A1 (fr) | 2021-10-04 | 2022-09-30 | Système électrique pour véhicule automobile |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20240356447A1 (fr) |
| CN (1) | CN118139763A (fr) |
| FR (1) | FR3127730A1 (fr) |
| WO (1) | WO2023057329A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102695850B1 (ko) * | 2022-06-21 | 2024-08-20 | 드라이브텍 주식회사 | 차량용 배터리 관리 시스템 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019053370A1 (fr) * | 2017-09-12 | 2019-03-21 | Valeo Systemes De Controle Moteur | Chargeur de vehicule comprenant un convertisseur dc/dc |
| US10926649B2 (en) * | 2014-12-22 | 2021-02-23 | Flex Power Control, Inc. | Method to reduce losses in a high voltage DC link converter |
-
2021
- 2021-10-04 FR FR2110478A patent/FR3127730A1/fr active Pending
-
2022
- 2022-09-30 WO PCT/EP2022/077273 patent/WO2023057329A1/fr not_active Ceased
- 2022-09-30 CN CN202280067028.XA patent/CN118139763A/zh active Pending
- 2022-09-30 US US18/683,914 patent/US20240356447A1/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10926649B2 (en) * | 2014-12-22 | 2021-02-23 | Flex Power Control, Inc. | Method to reduce losses in a high voltage DC link converter |
| WO2019053370A1 (fr) * | 2017-09-12 | 2019-03-21 | Valeo Systemes De Controle Moteur | Chargeur de vehicule comprenant un convertisseur dc/dc |
Also Published As
| Publication number | Publication date |
|---|---|
| CN118139763A (zh) | 2024-06-04 |
| FR3127730A1 (fr) | 2023-04-07 |
| US20240356447A1 (en) | 2024-10-24 |
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