EP4377133A1 - Système d'entraînement électrique pour un véhicule et procédé d'actionnement d'un système d'entraînement électrique - Google Patents

Système d'entraînement électrique pour un véhicule et procédé d'actionnement d'un système d'entraînement électrique

Info

Publication number
EP4377133A1
EP4377133A1 EP22757562.8A EP22757562A EP4377133A1 EP 4377133 A1 EP4377133 A1 EP 4377133A1 EP 22757562 A EP22757562 A EP 22757562A EP 4377133 A1 EP4377133 A1 EP 4377133A1
Authority
EP
European Patent Office
Prior art keywords
vehicle
charging
electric
phase
electrical energy
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.)
Pending
Application number
EP22757562.8A
Other languages
German (de)
English (en)
Inventor
Nathan Tröster
Markus Orner
Urs Boehme
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mercedes Benz Group AG
Original Assignee
Mercedes Benz Group AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mercedes Benz Group AG filed Critical Mercedes Benz Group AG
Publication of EP4377133A1 publication Critical patent/EP4377133A1/fr
Pending legal-status Critical Current

Links

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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/443—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M5/45—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H02M5/4505—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only having a rectifier with controlled elements
    • 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
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B60L15/2036—Electric differentials, e.g. for supporting steering vehicles
    • 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
    • B60L53/10—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 the energy transfer between the charging station and the vehicle
    • B60L53/11—DC charging controlled by the charging station, e.g. mode 4
    • 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
    • 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
    • B60L53/24—Using the vehicle's propulsion converter for charging
    • 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
    • B60L2210/00—Converter types
    • B60L2210/10—DC to DC converters
    • 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
    • B60L2210/00—Converter types
    • B60L2210/10—DC to DC converters
    • B60L2210/14—Boost converters
    • 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
    • B60L2220/00—Electrical machine types; Structures or applications thereof
    • B60L2220/40—Electrical machine applications
    • B60L2220/42—Electrical machine applications with use of more than one motor
    • 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
    • B60L2270/00—Problem solutions or means not otherwise provided for
    • B60L2270/10—Emission reduction
    • B60L2270/14—Emission reduction of noise
    • B60L2270/147—Emission reduction of noise electro magnetic [EMI]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

Definitions

  • the invention relates to an electric drive system for a vehicle according to the preamble of patent claim 1.
  • the invention also relates to a method for operating an electric drive system of a vehicle according to the preamble of patent claim 5.
  • Electrically powered vehicles today have a voltage level of 800 volts. These vehicles have an 800-volt vehicle battery, with which an on-board network and/or an electric drive motor can be supplied with energy. For example, this is disclosed in DE 102019005621 A1 and DE 102009052680 A1.
  • an AC voltage is generated from a battery voltage of the vehicle battery by means of an inverter. For example, this is disclosed in DE 102018000488 A1.
  • DE 102018009848 A1 and DE 102018009840 A1 each disclose switching arrangements for motor vehicles.
  • an electrical machine of a vehicle is supplied with electrical energy by means of a power converter via a high-voltage battery of the vehicle.
  • a disadvantage of the charging options for an 800-volt vehicle at a 400-volt charging station is the increased additional expense for downward compatibility.
  • One object of the present invention is to be able to charge an electrical energy store of an at least partially electrically operated vehicle more simply and independently of the voltage level of a charging station. This object is achieved by an electric drive system and a method according to the independent patent claims. Useful developments result from the dependent claims.
  • One aspect of the invention relates to an electric drive system for a vehicle, with
  • An electrical energy storage device for supplying electricity to the first and second three-phase electrical machine while the vehicle is driving, a first inverter of the first three-phase electrical machine and a second inverter of the second three-phase electrical machine being coupled to the electrical energy storage device, and
  • a charging voltage of the on-board charging connection can be converted into a supply voltage for charging the electrical energy store.
  • the electric drive system of the vehicle in particular of an at least partially electrically driven vehicle, can have two electric drive machines or electric three-phase machines per drive axle exhibit.
  • two electrical machines can be arranged per drive axle or axle of the vehicle.
  • each wheel of the vehicle in particular each axle of the vehicle, can be driven and controlled individually with its own electric machine.
  • this offers the additional advantage that a mechanical differential gear can be dispensed with and this can be replaced by an electric differential, which is provided by the electric machine. In this way, in particular, weight savings and cost savings of the vehicle can be achieved.
  • One advantage of using several electrical machines per drive axle or axis is the implementation of "torque vectoring".
  • the two drive inverters of a vehicle axle of the vehicle are misused for the charging process.
  • these drive inverters fulfill the electrical supply of the electrical three-phase machines and in a secondary function the charging of the electrical energy store at a charging station with a voltage level that is lower than the voltage level of the vehicle is made possible.
  • the inductances of the electrical three-phase machines can be used for the charging process at the charging station, so that no additional installation space for large and heavy chokes is required to boost the lower voltage of the charging station.
  • EMC interference or electromagnetic interference in the direction of the DC charging source DC charging socket
  • the EMC filter is normally used to protect the charging station from interference or fluctuations.
  • one of the two inverters is used as a step-up converter when charging at a 400 volt charging station and the other inverter switches through the necessary current path, in particular clocked.
  • at least one inverter is used as a step-up converter to convert the 400 volts of the charging station to the 800 volts to raise the vehicle battery.
  • additional components for downward compatibility with a 400 volt charging process can also be omitted, since the inverters already in the vehicle are misused.
  • additional components can be dispensed with, since the inverters of the electric drive system have an additional functionality for charging at a 400-volt charging station in addition to their primary function.
  • Another aspect of the invention relates to a method for operating an electric drive system of a vehicle, wherein
  • At least one drive axle of the vehicle is driven by a first three-phase electric machine and a second three-phase electric machine, wherein
  • a first inverter of the first three-phase machine and a second inverter of the second three-phase machine are each electrically supplied with an electrical energy store, wherein
  • a vehicle-side charging connection of the vehicle is electrically coupled to the first and second electrical three-phase machine
  • a charging voltage of the vehicle-side charging connection is converted into a supply voltage for charging the electrical energy store.
  • an electric drive system can be used for a charging operation of the vehicle in addition to its primary function for driving the vehicle using electric three-phase machines, so that the electric drive system has a primary function for supplying the electric three-phase machine for driving a vehicle and a secondary function for charging a 800 volt vehicle to a 400 volt charging station.
  • the method just described can be carried out with an electric drive system according to the previous aspect or an advantageous embodiment thereof.
  • Advantageous configurations of the electric drive system are to be regarded as advantageous configurations of the method.
  • the electric drive system has to physical features which enable the method to be carried out or an advantageous embodiment thereof.
  • advantageous embodiments of one aspect are to be regarded as advantageous embodiments of the other aspect or vice versa.
  • FIG. 1 shows a schematic block diagram of a drive system of a vehicle during an 800V charging process of the vehicle
  • FIG. 2 shows a further schematic block diagram of the drive system from FIG. 1 during a 400V charging process of the vehicle.
  • FIG. 1 shows, for example, a schematic representation of an electric drive system 1 according to the invention of a vehicle.
  • This is an electric drive system of an electric vehicle or a hybrid vehicle.
  • the vehicle has a voltage level of 800 volts.
  • the voltage, in particular a battery voltage Ue att of an electrical energy store 2 of the vehicle is to be understood.
  • the battery voltage Ue att of the electrical energy store 2 has a voltage range of 770 volts to 830 volts.
  • the battery voltage Ue att depending on the state of charge of the electrical energy store 2 and / or a circuit structure of the electric drive system 1 and / or an operating state of the electric Drive system 1 fluctuate.
  • the electrical energy store has a battery voltage Ußatt with a voltage of essentially 800 volts.
  • “essentially” means a tolerance of +/- 5 percent, in particular +/- 10 percent. In particular, tolerances and/or measurement tolerances of 5%, in particular 10%, must be taken into account for the specified voltage values.
  • the electric drive system 1 means all components and/or systems that are required for driving or moving the vehicle.
  • the electric drive system 1 can include the vehicle body, the electric energy store 2, a vehicle-side charging connection 3, at least one drive axle 4, the electric energy store 2 and at least a first electric three-phase machine 5 and a second electric three-phase machine 6. Consequently, locomotion travel of the vehicle can be performed with the aid of the electric drive system 1 .
  • the electric drive system 1 has at least one drive axle 4 .
  • the vehicle or the electric drive system 1 can have multiple drive axles.
  • the vehicle can be a passenger car with one or two drive axles or a truck with several drive axles.
  • this at least one drive axle 4 has the two electric three-phase machines 5 , 6 . Consequently, each drive axle of the vehicle can have at least two electric three-phase machines.
  • each wheel of the drive axle can be driven with its own electric machine, ie the two three-phase machines 5, 6.
  • each tire of the vehicle can be driven or controlled by its own electric drive unit.
  • the first three-phase electric machine 5 and the second three-phase electric machine 6 can be arranged together or jointly on a rear axle or on a front axle as a drive axle.
  • two electric three-phase machines can be arranged per axis.
  • both the rear axle and the front axle can have two three-phase machines.
  • the two three-phase machines 5, 6 are arranged either on the rear axle or on the front axle, depending on whether the rear axle or the front axle is the drive axle of the vehicle.
  • a first wheel 7 of the drive axle 4 can be driven with the first three-phase machine 5 and a second wheel 8 of the drive axle 4 that is different from the first wheel 7 can be driven with the second electric three-phase machine 6 .
  • the two electrical three-phase machines 5, 6 can drive the drive axle 4, they are supplied or fed with energy by the electrical energy store 2. Since the battery voltage U ßatt is a DC voltage, but the electrical three-phase machines 5, 6 require an AC voltage, the electrical three-phase machines 5, 6 each have an inverter 9, 10. The first electric three-phase machine 5 has the first inverter 9 and the second electric three-phase machine 6 has the second inverter 10 .
  • the inverters 9, 10 are in particular a power converter, inverter or rotary converter. With the help of the inverters 9, 10, the battery voltage U ßatt can be converted or directed into an alternating voltage for supplying or operating the three-phase machines 5, 6.
  • the two inverters 9, 10 are connected or coupled to the electrical energy store 2.
  • the two inverters 9, 10 can each be connected to the electrical energy store 2 via their input sides. Both inverters 9, 10 can thus be supplied simultaneously, in particular with identical battery voltages Ußatt.
  • the inverters 9, 10 can be referred to as drive inverters.
  • the inverter 9, 10 can be an S3L inverter or a 3-level inverter.
  • the vehicle-side charging connection 3 is in particular a charging socket or a charging socket of the vehicle.
  • a vehicle-external charging unit 11 can be connected to the vehicle-side charging connection.
  • the vehicle-external charging unit 11 can be, for example, a charging station or trade a charging station.
  • the charging unit 11 is a DC charging source for providing a DC voltage.
  • the charging unit 11 provides a charging voltage UL to the charging connection 3 on the vehicle side.
  • the charging voltage UL has a voltage value that is essentially the same as the battery voltage U ßatt .
  • the battery voltage Ußatt and the charging voltage UL are 800 volts. Since this is not always the case, the two inverters 9, 10 and in particular the electric three-phase machines 5, 6 can be used for other purposes in the event that the charging unit 11 can only provide a charging voltage L of less than 500 volts. In this case, downward compatibility of the electric drive system 1 is therefore required.
  • the electrical three-phase machines 5, 6 and in particular the inverters 9, 10 are misused for this charging operation.
  • either the first inverter 9 or the second inverter 10 is operated as a step-up converter or step-up converter for the charging operation of the vehicle and in particular of the electrical energy store 2 .
  • the electrical energy store 2 can be, for example, a vehicle battery or a battery system or a number of partial batteries or a high-voltage battery.
  • the electrical drive system 1 can have a switching device 12 or switching device or switching matrix. With this switching device 12, either a direct charging process of the electrical energy store 2 by the charging unit 11 or indirectly via the inverters 9, 10 can be set or switched.
  • FIG. 1 now shows the case of 800 volt DC charging.
  • the switching device 12 is switched to a first switching position.
  • the vehicle-side charging connection 3 or the charging unit 11 is connected or coupled directly to the electrical energy store 2 so that the electrical energy store 2 can be charged using the charging voltage UL.
  • This direct 800 volt DC charging is shown in FIG. 1 with the arrow 13 showing the direction of current flow.
  • FIG. 2 a 400 volt DC charging process of the electrical energy store 2 is now shown as an example.
  • the explanations for the electric drive system are identical to those from FIG. 1.
  • the switching device 12 is switched to a second switching position that is different from the first switching position.
  • the vehicle-side charging connection 3 is electrically connected or coupled to the first and second electrical three-phase machine 5, 6 and the inverters 9, 10.
  • the charging voltage UL which in this case can be 400 volts, can be converted or stepped up into a supply voltage UV. Consequently, the voltage value of the charging voltage UL can be stepped up so that a voltage value of 800 volts is present as the supply voltage UV.
  • the electrical energy store 2 can now be charged with this supply voltage. For this purpose, for example, in FIG.
  • At least one of the two inverters 9, 10 is operated as a step-up converter.
  • the other inverter 9, 10 is operated in a clocked manner or as a clock generator.
  • the current flow of the clock-generating components is shown here with the current flow direction arrow 15 .
  • the current flow direction arrows 15 of clocked operation are shown in dashed lines.
  • the various semiconductor switches of the inverters 9, 10 can be controlled for the step-up operation and the clocking operation of the first and/or second inverter 9, 10.
  • the inverters 9, 10 can have IGBTs or MOSFETs for this purpose.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

L'invention concerne un système d'entraînement électrique (1) pour un véhicule, comprenant : - une première machine électrique triphasée (5) et une seconde machine électrique triphasée (6) pour entraîner au moins un essieu d'entraînement (4) du véhicule ; - un accumulateur d'énergie électrique (2) pour alimenter électriquement les première et seconde machines électriques triphasées (5, 6) pendant l'actionnement d'entraînement du véhicule, auquel accumulateur d'énergie électrique (2) un premier onduleur (9) de la première machine électrique triphasée (5) et un second onduleur (10) de la seconde machine électrique triphasée (6) sont chacun couplés ; et - une borne de charge embarquée (3) pour le couplage électrique de l'accumulateur d'énergie électrique (2) à une unité de charge (11) externe au véhicule ; conformément au premier et/ou au second onduleur (9, 10), une tension de charge (UL) de la borne de charge embarquée (3) pouvant être convertie en une tension d'alimentation (UV) pour charger l'accumulateur d'énergie électrique (2). L'invention concerne également un procédé associé.
EP22757562.8A 2021-07-27 2022-07-26 Système d'entraînement électrique pour un véhicule et procédé d'actionnement d'un système d'entraînement électrique Pending EP4377133A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021003882.7A DE102021003882A1 (de) 2021-07-27 2021-07-27 Elektrisches Antriebssystem für ein Fahrzeug, sowie Verfahren zum Betreiben eines elektrischen Antriebssystems
PCT/EP2022/070946 WO2023006749A1 (fr) 2021-07-27 2022-07-26 Système d'entraînement électrique pour un véhicule et procédé d'actionnement d'un système d'entraînement électrique

Publications (1)

Publication Number Publication Date
EP4377133A1 true EP4377133A1 (fr) 2024-06-05

Family

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EP22757562.8A Pending EP4377133A1 (fr) 2021-07-27 2022-07-26 Système d'entraînement électrique pour un véhicule et procédé d'actionnement d'un système d'entraînement électrique

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EP (1) EP4377133A1 (fr)
CN (1) CN117813215A (fr)
DE (1) DE102021003882A1 (fr)
WO (1) WO2023006749A1 (fr)

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DE102009052680A1 (de) 2009-11-11 2011-05-12 Daimler Ag Ladevorrichtung zum Laden einer Batterie eines Kraftfahrzeugs mit Tiefsetzsteller
US9783070B2 (en) * 2014-02-14 2017-10-10 Jabil Circuit, Inc. Charge transfer system
US11479139B2 (en) * 2015-09-11 2022-10-25 Invertedpower Pty Ltd Methods and systems for an integrated charging system for an electric vehicle
DE102018000488A1 (de) 2018-01-22 2018-07-12 Daimler Ag Elektrisches Antriebssystem für ein Fahrzeug und Verfahren zu dessen Betrieb
DE102018207183A1 (de) * 2018-05-09 2019-11-14 Robert Bosch Gmbh Vorrichtung zum Laden eines Energiespeichers eines Elektrofahrzeugs
DE102018009848A1 (de) 2018-12-14 2019-06-27 Daimler Ag Schaltungsanordnung für ein Kraftfahrzeug, insbesondere für ein Hybrid- oder Elektrofahrzeug
DE102018009840A1 (de) 2018-12-14 2019-06-27 Daimler Ag Schaltungsanordnung für ein Kraftfahrzeug, insbesondere für ein Hybrid- oder Elektrofahrzeug
DE102019005621A1 (de) 2019-08-09 2020-04-16 Daimler Ag Bordnetz für ein elektrisch antreibbares Kraftfahrzeug

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DE102021003882A1 (de) 2021-09-09
CN117813215A (zh) 2024-04-02

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