WO2023208693A1 - Charging device for directionally charging an electric energy store of a motor vehicle - Google Patents

Charging device for directionally charging an electric energy store of a motor vehicle Download PDF

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Publication number
WO2023208693A1
WO2023208693A1 PCT/EP2023/060180 EP2023060180W WO2023208693A1 WO 2023208693 A1 WO2023208693 A1 WO 2023208693A1 EP 2023060180 W EP2023060180 W EP 2023060180W WO 2023208693 A1 WO2023208693 A1 WO 2023208693A1
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WO
WIPO (PCT)
Prior art keywords
converter
charging
charging device
vehicle
voltage
Prior art date
Application number
PCT/EP2023/060180
Other languages
German (de)
French (fr)
Inventor
Juergen Benecke
Stefan Seiffert
Urs Boehme
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 WO2023208693A1 publication Critical patent/WO2023208693A1/en

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Classifications

    • 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
    • B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • H02J3/322—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
    • 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
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • 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
    • H02M3/33576—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 having at least one active switching element at the secondary side of an isolation transformer
    • H02M3/33584—Bidirectional converters
    • 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
    • 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

  • Charging device for directional charging of an electrical energy storage device of a vehicle
  • the invention relates to a charging device for charging an electrical energy storage device of a vehicle.
  • the charging device has an input side for connecting the charging device to a charging unit external to the vehicle. By means of an output side of the charging device, the charging device can be connected to the electrical energy storage of the vehicle.
  • the charging device has a first DC-DC converter, which is connected between the input side and the output side in order to provide an output voltage on the output side depending on an input voltage on the input side.
  • DE 102020 007 840 A1 discloses a step-up converter for converting an electrical energy storage device of an electrically driven vehicle.
  • a DC/DC converter can be used for this, for example.
  • An object of the present invention is to improve bidirectional charging functionality of an electrically powered vehicle. This task is solved by a charging device according to claim 1. Useful further training results from the dependent patent claims.
  • One aspect of the invention relates to a charging device for charging an electrical energy storage device of a vehicle
  • a first DC-DC converter which is connected between the input side and the output side, for providing an output voltage on the output side depending on an input voltage on the input side
  • a second DC-DC converter which is connected in parallel to the first DC-DC converter, for providing a feedback voltage on the input side depending on a battery voltage on the output side.
  • Bidirectional charging of an electrically operated vehicle can be improved by the charging device according to the invention or proposed.
  • the charging device can thus enable bidirectional charging of the vehicle with an on-board electrical system voltage of, for example, 800 volts on a 400 volt charging structure.
  • the charging device according to the invention also allows a recovery process from the electrical energy storage to be carried out.
  • the charging device according to the invention results in the advantages, for example, that 400 volt downward compatibility with feedback can be met or carried out in accordance with standards.
  • the proposed charging device does not allow complex, extremely fast sensing of a fault current and switching off within the permitted 7000 A 2 s. Due to the significantly lower feedback power, for example between 10 and 20 kW compared to the conventional 150 kW charging power, the use of DC/DC is also possible converter of the on-board charger is conceivable.
  • the second DC-DC converter can be used to pre-charge the line between the vehicle and the charging station.
  • the proposed charging device provides the use of a galvanically isolated DC/DC converter for regeneration.
  • a galvanic can also be used for this purpose separate DC/DC converter of the vehicle's internal on-board charger (OBC) can be used.
  • OBC on-board charger
  • the proposed charging device cannot use the first DC-DC converter, i.e. the actual charging converter, for the recovery of energy, but can use a separate galvanically isolated DC/DC converter (second DC-DC converter) for the recovery or can use the DC/DC converter of an On -Use a board charger so that the feedback is arranged parallel to the charging converter (first DC-DC converter) and thus enables bidirectional charging without making the charging converter (first DC-DC converter) itself bidirectional.
  • first DC-DC converter i.e. the actual charging converter
  • second DC-DC converter galvanically isolated DC/DC converter
  • the DC/DC converter of an On -Use a board charger so that the feedback is arranged parallel to the charging converter (first DC-DC converter) and thus enables bidirectional charging without making the charging converter (first DC-DC converter) itself bidirectional.
  • FIG. 1 shows a schematic representation of an exemplary embodiment of a charging device according to the invention.
  • FIG. 2 shows a schematic representation of a further exemplary embodiment of the charging device from FIG. 1;
  • Fig. 1 shows a charging device 1 for charging an electrical energy storage device 2 of a vehicle.
  • the vehicle can be, for example, electric operated or electrically powered vehicle, such as a plug-in vehicle or an electric vehicle.
  • the charging device 1 can be referred to, for example, as a charging device or charging unit. With the help of the charging device 1, the electrical energy storage 2 can be charged depending on a voltage of a DC charging station.
  • the charging device 1 has an input side 3 for connecting the charging device 1 to a charging unit 4 external to the vehicle.
  • the vehicle-external charging unit 4 can be, for example, a DC voltage source, a DC power source or a DC charging infrastructure or a DC charging station. With the help of the vehicle-external charging unit 4, a direct voltage can in particular be provided.
  • the charging device 1 has an output side 5. With the help of the output side 5, the charging device 1 can be connected to the electrical energy storage 2. The charging device 1 is thus switched between the vehicle-external charging unit and the electrical energy storage 2.
  • an input voltage UE can be present on the input side 3. This is provided by the vehicle-external charging unit 4.
  • the input voltage UE can be 400 volts. This input voltage UE can be converted or transformed into the output voltage UA using a first DC-DC converter 6 of the charging device 1.
  • the first DC-DC converter 6 is specifically connected or switched between the input side 3 and the output side 5.
  • the output voltage UA can thus be provided on the output side 5 depending on the input voltage UE. This is used to charge or electrically supply the electrical energy storage 2 and thus the vehicle 1.
  • a high-voltage on-board electrical system or an on-board electrical system of the vehicle can be electrically supplied.
  • the input voltage UE which is, for example, 400 volts
  • the output voltage UA can be, for example, 800 volts, so that the electrical energy storage can be charged.
  • the electrical energy storage 2 has a voltage level of 800 volts.
  • the first DC-DC converter 6 is designed to be particularly unidirectional. Due to its electrical components, such as semiconductor elements and diodes, this only allows current to flow from the input side 3 to the output side 5.
  • a further DC-DC converter 6 is required and a separate second DC-DC converter 7 is provided.
  • This second DC-DC converter 7 can be, for example, a galvanically isolated DC/DC converter.
  • This second DC-DC converter 7, which is separate from the first DC-DC converter, serves in particular to carry out a feedback process.
  • energy present in the electrical energy storage 2 can be made available to the vehicle-external charging unit 4, for example.
  • a battery voltage UBatt of the electrical energy storage 2 can be converted into a feedback voltage UR.
  • This feedback voltage UR can be present on the input side 3, for example.
  • the 800 volts that are present as a voltage in the electrical energy storage 2 can be converted to a voltage level of 400 volts.
  • the battery voltage UBatt has 400 volts and, for example, the feedback voltage UR is increased to a voltage level of 800 volts with the aid of the second DC-DC converter 7.
  • Both the first DC-DC converter 6 and the second DC-DC converter 7 can be used either as a step-up converter or step-up converter and/or a step-down converter or step-down converter.
  • first DC-DC converter 6 and the second DC-DC converter 7 are connected in parallel to one another.
  • An output side A1 of the first DC-DC converter 6 is electrically connected to an input side E2 of the second DC-DC converter 7.
  • the input side E1 of the first DC-DC converter 6 can be electrically connected to the output side A2 of the second DC-DC converter 7.
  • separating elements 8 can be provided between the output side A2 of the second DC-DC converter 7 and the input side E1 of the first DC-DC converter 6.
  • the current path via the second DC-DC converter 7 to the input side 3 can be referred to as a feedback path or feedback line.
  • the second DC-DC converter 7 can be galvanically isolated from the input side 3.
  • the separating elements 8 can be used for this.
  • an EMC filter 9 is arranged between the output side 5 and the second DC-DC converter 7, i.e. between the output side 5 and the input side E2. This means that the battery voltage UBatt can be filtered accordingly for energy recovery.
  • FIG. 1 A further possible embodiment of the charging device 1 from FIG. 1 is shown in FIG. It is shown here that the second DC-DC converter 7 is part of an integrated charger 10 of the vehicle. Such a charger 10 can in particular be an on-board charger. This primarily serves to be able to charge the electrical energy storage device at an AC voltage source or an AC charging connection 11. By using the second DC-DC converter 7 integrated there or a DC-DC converter of the charger 10, components or components for energy recovery can be saved.
  • the EMC filter 9 can also be arranged in front of the second DC-DC converter 7.
  • the output side A2 of the second DC-DC converter 7 can be connected to the input side 3 via the separating elements 8, as already described above.
  • the charger 10 is a rectifier, it has a power factor correction filter 12 and an AC EMC filter. These are connected between the AC voltage source 11 or an AC voltage section of the vehicle and the output side 5.
  • switching elements 14 are provided between the power factor correction filter 12 (PFC “Power Factor Correction”).
  • PFC Power Factor Correction
  • the switching elements 14 are switched so that a current flow from the alternating voltage source 11 to the electrical energy storage 2 is possible. If If a feedback process is to be carried out, the switching elements 14 are switched so that the output side A2 is connected to the input side 3. Furthermore, in this case the separating elements 8 are closed.

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

Abstract

The invention relates to a charging device (1) for charging an electrical energy store (2) of a vehicle, said charging device comprising: an input side (3) for connecting the charging device (1) to a charging unit (4) external to the vehicle; an output side (5) for connecting the charging device (1) to the electrical energy store (2) of the vehicle; a first DC-to-DC converter (6), which is connected between the input side (3) and the output side (5), for providing an output voltage (UÄ) at the output side depending on an input voltage (UE) of the input side (3). The charging device is characterised by a second DC-to-DC converter (7), which is connected in parallel with the first DC-to-DC converter (6), for providing a feedback voltage (UR) at the input side (3) depending on a battery voltage (UBatt) at the output side (5).

Description

Ladevorrichtung zum direktionalen Laden eines elektrischen Energiespeichers eines Fahrzeugs Charging device for directional charging of an electrical energy storage device of a vehicle
Die Erfindung betrifft eine Ladevorrichtung zum Laden eines elektrischen Energiespeichers eines Fahrzeugs. Die Ladevorrichtung weist eine Eingangsseite zum Verbinden der Ladevorrichtung mit einer fahrzeugexternen Ladeeinheit auf. Mittels einer Ausgangsseite der Ladevorrichtung kann die Ladevorrichtung mit dem elektrischen Energiespeicher des Fahrzeugs verbunden werden. Des Weiteren weist die Ladevorrichtung einen ersten Gleichspannungswandler, welcher zwischen der Eingangsseite und der Ausgangsseite verschaltet ist, um eine Ausgangsspannung an der Ausgangsseite abhängig von einer Eingangsspannung der Eingangsseite bereitzustellen. The invention relates to a charging device for charging an electrical energy storage device of a vehicle. The charging device has an input side for connecting the charging device to a charging unit external to the vehicle. By means of an output side of the charging device, the charging device can be connected to the electrical energy storage of the vehicle. Furthermore, the charging device has a first DC-DC converter, which is connected between the input side and the output side in order to provide an output voltage on the output side depending on an input voltage on the input side.
Bei elektrisch betriebenen Fahrzeugen mit einer 800 Volt-Batterie muss zum Laden an derzeit noch überwiegend 400 Volt-Ladesäulen eine Abwärtskompatibilität sichergestellt werden. Diese wird beispielsweise entweder durch eine auf 400 Volt umschaltbare Batterie oder durch einen galvanisch gekoppelten auf 400 Volt bis 800 Volt ausgelegten DC/DC-Wandler bereitgestellt. Im Falle eines Aufwärtswandeins (Boostern) gibt es bei der Norm „CHAdeMO 3.0“ die Anforderung, dass in einem Isolations-Fehlerfall der Fehlerstrom nur maximal 7000 A2s betragen darf. Dies lässt sich nur mit einer Diode im Ladepfad sicherstellen. Durch eine Diode wird zwar die Norm erfüllt, jedoch kann damit nicht mehr bidirektional an 400 Volt-Ladesäulen geladen werden. For electrically powered vehicles with an 800 volt battery, downward compatibility must be ensured for charging at currently predominantly 400 volt charging stations. This is provided, for example, either by a battery that can be switched to 400 volts or by a galvanically coupled DC/DC converter designed for 400 volts to 800 volts. In the case of boosting, the “CHAdeMO 3.0” standard requires that in the event of an insulation fault, the fault current must only be a maximum of 7000 A 2 s. This can only be ensured with a diode in the charging path. Although the standard is met by a diode, it can no longer be used to charge bidirectionally at 400 volt charging stations.
Beispielsweise offenbart die DE 102020 007 840 A1 einen Aufwärtswandler zum Wandeln eines elektrischen Energiespeichers eines elektrisch angetriebenen Fahrzeugs. Hierzu kann ein DC/DC-Wandler beispielsweise verwendet werden. For example, DE 102020 007 840 A1 discloses a step-up converter for converting an electrical energy storage device of an electrically driven vehicle. A DC/DC converter can be used for this, for example.
Eine Aufgabe der vorliegenden Erfindung besteht darin, eine bidirektionale Ladefunktionalität eines elektrisch betriebenen Fahrzeugs zu verbessern. Diese Aufgabe wird durch eine Ladevorrichtung gemäß dem Patentanspruch 1 gelöst. Sinnvolle Weiterbildungen ergeben sich aus den abhängigen Patentansprüchen. An object of the present invention is to improve bidirectional charging functionality of an electrically powered vehicle. This task is solved by a charging device according to claim 1. Useful further training results from the dependent patent claims.
Ein Aspekt der Erfindung betrifft eine Ladevorrichtung zum Laden eines elektrischen Energiespeichers eines Fahrzeugs, mit One aspect of the invention relates to a charging device for charging an electrical energy storage device of a vehicle
- einer Eingangsseite zum Verbinden der Ladevorrichtung mit einer fahrzeugexternen Ladeeinheit, - an input side for connecting the charging device to a charging unit external to the vehicle,
- einer Ausgangsseite zum Verbinden der Ladevorrichtung mit dem elektrischen Energiespeicher des Fahrzeugs, - an output side for connecting the charging device to the vehicle's electrical energy storage,
- einem ersten Gleichspannungswandler, welcher zwischen der Eingangsseite und der Ausgangsseite verschaltet ist, zum Bereitstellen einer Ausgangsspannung an der Ausgangsseite abhängig von einer Eingangsspannung der Eingangsseite, - a first DC-DC converter, which is connected between the input side and the output side, for providing an output voltage on the output side depending on an input voltage on the input side,
- einen zweiten Gleichspannungswandler, welcher parallel zum ersten Gleichspannungswandler verschaltet ist, zum Bereitstellen einer Rückspeise-Spannung an der Eingangsseite abhängig von einer Batteriespannung an der Ausgangsseite. - a second DC-DC converter, which is connected in parallel to the first DC-DC converter, for providing a feedback voltage on the input side depending on a battery voltage on the output side.
Durch die erfindungsgemäße beziehungsweise vorgeschlagene Ladevorrichtung kann ein bidirektionales Laden eines elektrisch betriebenen Fahrzeugs verbessert werden. Somit kann die Ladevorrichtung ein bidirektionales Laden des Fahrzeugs mit einer Bordnetzspannung mit beispielsweise 800 Volt an einer 400 Volt-Ladestruktur ermöglichen. Durch die erfindungsgemäße Ladevorrichtung kann neben dem Laden des elektrisch betriebenen Fahrzeugs auch ein Rückspeisevorgang aus dem elektrischen Energiespeicher durchgeführt werden. Bidirectional charging of an electrically operated vehicle can be improved by the charging device according to the invention or proposed. The charging device can thus enable bidirectional charging of the vehicle with an on-board electrical system voltage of, for example, 800 volts on a 400 volt charging structure. In addition to charging the electrically operated vehicle, the charging device according to the invention also allows a recovery process from the electrical energy storage to be carried out.
Durch die erfindungsgemäße Ladevorrichtung ergeben sich beispielsweise die Vorteile, dass eine 400 Volt-Abwärtskompatibilität mit Rückspeisung normkonform erfüllt beziehungsweise durchgeführt werden kann. Insbesondere erlaubt die vorgeschlagene Ladevorrichtung keine aufwendige, extrem schnelle Sensierung eines Fehlerstroms und Abschaltung innerhalb der erlaubten 7000 A2s. Durch die deutlich geringere Rückspeiseleistung, beispielsweise zwischen 10 und 20 kW gegenüber der herkömmlichen 150 kW Ladeleistung, ist auch die Verwendung des DC/DC-Wandlers des On-Boad-Laders denkbar. Insbesondere kann der zweite Gleichspannungswandler dazu verwendet werden, um die Leitung zwischen Fahrzeug und Ladestation vorzuladen. The charging device according to the invention results in the advantages, for example, that 400 volt downward compatibility with feedback can be met or carried out in accordance with standards. In particular, the proposed charging device does not allow complex, extremely fast sensing of a fault current and switching off within the permitted 7000 A 2 s. Due to the significantly lower feedback power, for example between 10 and 20 kW compared to the conventional 150 kW charging power, the use of DC/DC is also possible converter of the on-board charger is conceivable. In particular, the second DC-DC converter can be used to pre-charge the line between the vehicle and the charging station.
Somit liefert die vorgeschlagene Ladevorrichtung die Anwendung eines galvanisch getrennten DC/DC-Wandlers zur Rückspeisung. Hierzu kann des Weiteren ein galvanisch getrennter DC/DC-Wandler des fahrzeuginternen On-Board-Chargers (OBC) verwendet werden. Thus, the proposed charging device provides the use of a galvanically isolated DC/DC converter for regeneration. A galvanic can also be used for this purpose separate DC/DC converter of the vehicle's internal on-board charger (OBC) can be used.
Durch die Verwendung des zweiten Gleichspannungswandlers kann eine Rückspeisung (RPT „Reverse Power Transfer“) ermöglicht werden. Insbesondere kann die vorgeschlagene Ladevorrichtung für das Rückspeisen von Energie nicht den ersten Gleichspannungswandler, also den eigentlichen Ladewandler, nutzen, sondern einen separaten galvanisch getrennten DC/DC-Wandler (zweiter Gleichspannungswandler) für das Rückspeisen verwenden oder kann den DC/DC-Wandler eines On-Board-Laders dazu nutzen, so dass die Rückspeisung parallel zum Ladewandler (erster Gleichspannungswandler) angeordnet ist und damit ein bidirektionales Laden ermöglicht ist, ohne den Ladewandler (erster Gleichspannungswandler) selbst bidirektional auszuführen. By using the second DC-DC converter, feedback (RPT “Reverse Power Transfer”) can be made possible. In particular, the proposed charging device cannot use the first DC-DC converter, i.e. the actual charging converter, for the recovery of energy, but can use a separate galvanically isolated DC/DC converter (second DC-DC converter) for the recovery or can use the DC/DC converter of an On -Use a board charger so that the feedback is arranged parallel to the charging converter (first DC-DC converter) and thus enables bidirectional charging without making the charging converter (first DC-DC converter) itself bidirectional.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnung(en). Die vorstehend in der Beschreibung genannten Merkmale und Merkmalskombinationen sowie die nachfolgend in der Figurenbeschreibung genannten und/oder in den Figuren alleine gezeigten Merkmale und Merkmalskombinationen sind nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar, ohne den Rahmen der Erfindung zu verlassen. Further advantages, features and details of the invention result from the following description of preferred exemplary embodiments and from the drawing(s). The features and combinations of features mentioned above in the description as well as the features and combinations of features mentioned below in the description of the figures and/or shown in the figures alone can be used not only in the combination specified in each case, but also in other combinations or on their own, without the scope of to abandon invention.
Dabei zeigen die nachfolgenden Figuren in: The following figures show:
Fig. 1 eine schematische Darstellung eines Ausführungsbeispiels einer erfindungsgemäßen Ladevorrichtung; und 1 shows a schematic representation of an exemplary embodiment of a charging device according to the invention; and
Fig. 2 eine schematische Darstellung eines weiteren Ausführungsbeispiels der Ladevorrichtung aus Fig.1 ; 2 shows a schematic representation of a further exemplary embodiment of the charging device from FIG. 1;
In den Figuren sind funktionsgleiche Elemente mit denselben Bezugszeichen versehen. In the figures, functionally identical elements are provided with the same reference numbers.
Die Fig. 1 zeigt eine Ladevorrichtung 1 zum Laden eines elektrischen Energiespeichers 2 eines Fahrzeugs. Bei dem Fahrzeug kann es sich beispielsweise um ein elektrisch betriebenes beziehungsweise elektrisch angetriebenes Fahrzeug, wie beispielsweise ein Plug-in-Fahrzeug oder ein Elektrofahrzeug, handeln. Fig. 1 shows a charging device 1 for charging an electrical energy storage device 2 of a vehicle. The vehicle can be, for example, electric operated or electrically powered vehicle, such as a plug-in vehicle or an electric vehicle.
Die Ladevorrichtung 1 kann beispielsweise als Ladeeinrichtung beziehungsweise Ladeeinheit bezeichnet werden. Mit Hilfe der Ladevorrichtung 1 kann der elektrische Energiespeicher 2 in Abhängigkeit einer Spannung einer Gleichspannungsladesäule geladen werden. The charging device 1 can be referred to, for example, as a charging device or charging unit. With the help of the charging device 1, the electrical energy storage 2 can be charged depending on a voltage of a DC charging station.
Hierzu weist die Ladevorrichtung 1 eine Eingangsseite 3 zum Verbinden der Ladevorrichtung 1 mit einer fahrzeugexternen Ladeeinheit 4 auf. Bei der fahrzeugexternen Ladeeinheit 4 kann es sich beispielsweise um eine Gleichspannungsquelle, Gleichstromleistungsquelle oder um eine DC-Ladeinfrastruktur beziehungsweise eine DC- Ladesäule handeln. Mit Hilfe der fahrzeugexternen Ladeeinheit 4 kann insbesondere eine Gleichspannung bereitgestellt werden. Des Weiteren weist die Ladevorrichtung 1 eine Ausgangsseite 5 auf. Mit Hilfe der Ausgangsseite 5 kann die Ladevorrichtung 1 mit dem elektrischen Energiespeicher 2 verbunden werden. Somit ist die Ladevorrichtung 1 quasi zwischen der fahrzeugexternen Ladeeinheit und dem elektrischen Energiespeicher 2 geschalten. Beispielsweise kann an der Eingangsseite 3 eine Eingangsspannung UE anliegen. Diese wird durch die fahrzeugexterne Ladeeinheit 4 zur Verfügung gestellt. Beispielsweise kann die Eingangsspannung UE 400 Volt betragen. Diese Eingangsspannung UE kann mit Hilfe eines ersten Gleichspannungswandlers 6 der Ladevorrichtung 1 in die Ausgangsspannung UA gewandelt beziehungsweise transformiert werden. For this purpose, the charging device 1 has an input side 3 for connecting the charging device 1 to a charging unit 4 external to the vehicle. The vehicle-external charging unit 4 can be, for example, a DC voltage source, a DC power source or a DC charging infrastructure or a DC charging station. With the help of the vehicle-external charging unit 4, a direct voltage can in particular be provided. Furthermore, the charging device 1 has an output side 5. With the help of the output side 5, the charging device 1 can be connected to the electrical energy storage 2. The charging device 1 is thus switched between the vehicle-external charging unit and the electrical energy storage 2. For example, an input voltage UE can be present on the input side 3. This is provided by the vehicle-external charging unit 4. For example, the input voltage UE can be 400 volts. This input voltage UE can be converted or transformed into the output voltage UA using a first DC-DC converter 6 of the charging device 1.
Der erste Gleichspannungswandler 6 ist speziell zwischen der Eingangsseite 3 und der Ausgangsseite 5 verschaltet beziehungsweise geschalten. Somit kann an der Ausgangsseite 5 in Abhängigkeit von der Eingangsspannung UE die Ausgangsspannung UA bereitgestellt werden. Diese dient zum Laden beziehungsweise elektrischen Versorgen des elektrischen Energiespeichers 2 und somit des Fahrzeugs 1. Insbesondere kann mit Hilfe der Ausgangsspannung UA ein Hochvoltbordnetz beziehungsweise ein Bordnetz des Fahrzeugs elektrisch versorgt werden. Insbesondere kann die Eingangsspannung UE, welche beispielsweise 400 Volt beträgt, in eine dazu höhere Ausgangsspannung UA gewandelt werden. Hierbei kann die Ausgangsspannung UA beispielsweise 800 Volt betragen, so dass der elektrische Energiespeicher geladen werden kann. Beispielsweise weist der elektrische Energiespeicher 2 ein Spannungslevel von 800 Volt auf. Aus sicherheitstechnischen Gründen ist der erste Gleichspannungswandler 6 insbesondere unidirektional ausgebildet. Dieser erlaubt durch seine elektrischen Komponenten, wie Halbleiterelemente und Dioden, nur einen Stromfluss von der Eingangsseite 3 zur Ausgangsseite 5. Damit aber ein bidirektionales Laden mit der Ladevorrichtung 1 durchgeführt werden kann, ohne den ersten Gleichspannungswandler 6 umzugestalten, ist ein zum ersten Gleichspannungswandler 6 weiterer und dazu separater zweiter Gleichspannungswandler 7 vorgesehen. Bei diesem zweiten Gleichspannungswandler 7 kann es sich beispielsweise um einen galvanisch getrennten DC/DC-Wandler handeln. Dieser zweite und insbesondere zum ersten Gleichspannungswandler separater Gleichspannungswandler 7 dient insbesondere zum Durchführen eines Rückspeisevorgangs. Somit kann eine in dem elektrischen Energiespeicher 2 vorhandene Energie an die fahrzeugexterne Ladeeinheit 4 beispielsweise zur Verfügung gestellt werden. Dadurch kann mit Hilfe des zweiten Gleichspannungswandlers 7 eine Rückspeisung beziehungsweise ein Rückspeisen vorgenommen werden. Mit Hilfe des zweiten Gleichspannungswandlers 7 kann eine Batteriespannung UBatt des elektrischen Energiespeichers 2 in eine Rückspeise- Spannung UR gewandelt werden. Diese Rückspeise-Spannung UR kann beispielsweise an der Eingangsseite 3 anliegen. Somit können beispielsweise die 800 Volt, welche als Spannung im elektrischen Energiespeicher 2 vorhanden sind, auf ein Spannungsniveau von 400 Volt gewandelt werden. Ebenso denkbar ist, dass die Batteriespannung UBatt 400 Volt aufweist und mit Hilfe des zweiten Gleichspannungswandlers 7 die Rückspeise- Spannung UR mit einer Spannungslage von 800 Volt beispielsweise hochgesetzt wird. The first DC-DC converter 6 is specifically connected or switched between the input side 3 and the output side 5. The output voltage UA can thus be provided on the output side 5 depending on the input voltage UE. This is used to charge or electrically supply the electrical energy storage 2 and thus the vehicle 1. In particular, with the help of the output voltage UA, a high-voltage on-board electrical system or an on-board electrical system of the vehicle can be electrically supplied. In particular, the input voltage UE, which is, for example, 400 volts, can be converted into a higher output voltage UA. Here, the output voltage UA can be, for example, 800 volts, so that the electrical energy storage can be charged. For example, the electrical energy storage 2 has a voltage level of 800 volts. For safety reasons, the first DC-DC converter 6 is designed to be particularly unidirectional. Due to its electrical components, such as semiconductor elements and diodes, this only allows current to flow from the input side 3 to the output side 5. However, in order for bidirectional charging to be carried out with the charging device 1 without redesigning the first DC-DC converter 6, a further DC-DC converter 6 is required and a separate second DC-DC converter 7 is provided. This second DC-DC converter 7 can be, for example, a galvanically isolated DC/DC converter. This second DC-DC converter 7, which is separate from the first DC-DC converter, serves in particular to carry out a feedback process. Thus, energy present in the electrical energy storage 2 can be made available to the vehicle-external charging unit 4, for example. As a result, with the help of the second DC-DC converter 7, energy recovery or regeneration can be carried out. With the help of the second DC-DC converter 7, a battery voltage UBatt of the electrical energy storage 2 can be converted into a feedback voltage UR. This feedback voltage UR can be present on the input side 3, for example. Thus, for example, the 800 volts that are present as a voltage in the electrical energy storage 2 can be converted to a voltage level of 400 volts. It is also conceivable that the battery voltage UBatt has 400 volts and, for example, the feedback voltage UR is increased to a voltage level of 800 volts with the aid of the second DC-DC converter 7.
Sowohl der erste Gleichspannungswandler 6 als auch der zweite Gleichspannungswandler 7 können entweder als Hochsetzsteller beziehungsweise Aufwärtswandler und/oder Tiefsetzsteller beziehungsweise Abwärtswandler verwendet werden. Both the first DC-DC converter 6 and the second DC-DC converter 7 can be used either as a step-up converter or step-up converter and/or a step-down converter or step-down converter.
Insbesondere sind der erste Gleichspannungswandler 6 und der zweite Gleichspannungswandler 7 parallel zueinander verschalten. Eine Ausgangsseite A1 des ersten Gleichspannungswandlers 6 ist mit einer Eingangsseite E2 des zweiten Gleichspannungswandlers 7 elektrisch verbunden. Die Eingangsseite E1 des ersten Gleichspannungswandlers 6 kann mit der Ausgangsseite A2 des zweiten Gleichspannungswandlers 7 elektrisch verbunden werden. Zusätzlich können zwischen der Ausgangsseite A2 des zweiten Gleichspannungswandlers 7 und der Eingangsseite E1 des ersten Gleichspannungswandlers 6 Trennelemente 8 vorgesehen sein. Somit kann ein Stromfluss zwischen dem zweiten Gleichspannungswandler 7 und der Eingangsseite 3 getrennt oder leitend geschalten werden. In particular, the first DC-DC converter 6 and the second DC-DC converter 7 are connected in parallel to one another. An output side A1 of the first DC-DC converter 6 is electrically connected to an input side E2 of the second DC-DC converter 7. The input side E1 of the first DC-DC converter 6 can be electrically connected to the output side A2 of the second DC-DC converter 7. In addition, separating elements 8 can be provided between the output side A2 of the second DC-DC converter 7 and the input side E1 of the first DC-DC converter 6. Thus can a current flow between the second DC-DC converter 7 and the input side 3 can be separated or switched on.
Insbesondere kann der Strompfad über den zweiten Gleichspannungswandler 7 hin zu der Eingangsseite 3 als Rückspeisepfad beziehungsweise Rückspeiseleitung bezeichnet werden. In particular, the current path via the second DC-DC converter 7 to the input side 3 can be referred to as a feedback path or feedback line.
Der zweite Gleichspannungswandler 7 ist gegenüber Eingangsseite 3 galvanisch trennbar. Hierzu können die Trennelemente 8 verwendet werden. The second DC-DC converter 7 can be galvanically isolated from the input side 3. The separating elements 8 can be used for this.
Beispielsweise ist zwischen der Ausgangsseite 5 und dem zweiten Gleichspannungswandler 7, also zwischen der Ausgangsseite 5 und der Eingangsseite E2, ein EMV-Filter 9 angeordnet. Somit kann für die Rückspeisung die Batteriespannung UBatt entsprechend gefiltert werden. For example, an EMC filter 9 is arranged between the output side 5 and the second DC-DC converter 7, i.e. between the output side 5 and the input side E2. This means that the battery voltage UBatt can be filtered accordingly for energy recovery.
In der Fig. 2 ist eine weitere mögliche Ausgestaltung der Ladevorrichtung 1 aus der Fig. 1 dargestellt. Hierbei ist dargestellt, dass der zweite Gleichspannungswandler 7 Bestandteil eines integrierten Ladegeräts 10 des Fahrzeugs ist. Bei einem solchen Ladegerät 10 kann es sich insbesondere um einen On-Board-Lader (On-Board-Charger) handeln. Dieser dient primär dazu, den elektrischen Energiespeicher auch an einer Wechselspannungsquelle beziehungsweise einem AC-Ladenanschluss 11 laden zu können. Durch die Verwendung des dort integrierten zweiten Gleichspannungswandlers 7 beziehungsweise eines Gleichspannungswandlers des Ladegeräts 10 können Komponenten beziehungsweise Bauteile für die Rückspeisung eingespart werden. A further possible embodiment of the charging device 1 from FIG. 1 is shown in FIG. It is shown here that the second DC-DC converter 7 is part of an integrated charger 10 of the vehicle. Such a charger 10 can in particular be an on-board charger. This primarily serves to be able to charge the electrical energy storage device at an AC voltage source or an AC charging connection 11. By using the second DC-DC converter 7 integrated there or a DC-DC converter of the charger 10, components or components for energy recovery can be saved.
Hierbei kann wiederum ebenfalls das EMV-Filter 9 vor dem zweiten Gleichspannungswandler 7 angeordnet sein. Die Ausgangsseite A2 des zweiten Gleichspannungswandlers 7 ist wie bereits oben geschildert über die Trennelemente 8 mit der Eingangsseite 3 verbindbar. Da es sich bei dem Ladegerät 10 um einen Gleichrichter handelt, weist dieser einen Leistungsfaktorkorrekturfilter 12 und einen AC-EMV-Filter auf. Diese sind zwischen der Wechselspannungsquelle 11 beziehungsweise einem Wechselspannungsabschnitt des Fahrzeugs und der Ausgangsseite 5 geschalten. Um bei der Verwendung eines Rückspeisevorgangs die Komponenten 12, 13 spannungsfrei schalten zu können, sind zwischen dem Leistungsfaktorkorrekturfilter 12 (PFC „Power Factor Correction“) Schaltelemente 14 vorgesehen. Für einen herkömmlichen Betrieb des Ladegeräts werden die Schaltelemente 14 so geschalten, dass ein Stromfluss von der Wechselspannungsquelle 11 hin zum elektrischen Energiespeicher 2 möglich ist. Wenn ein Rückspeisevorgang vorgenommen werden soll, so werden die Schaltelemente 14 so geschalten, dass die Ausgangsseite A2 mit der Eingangsseite 3 verbunden ist. Des Weiteren werden in diesem Fall die Trennelemente 8 geschlossen. Here again, the EMC filter 9 can also be arranged in front of the second DC-DC converter 7. The output side A2 of the second DC-DC converter 7 can be connected to the input side 3 via the separating elements 8, as already described above. Since the charger 10 is a rectifier, it has a power factor correction filter 12 and an AC EMC filter. These are connected between the AC voltage source 11 or an AC voltage section of the vehicle and the output side 5. In order to be able to switch off the components 12, 13 without voltage when using a feedback process, switching elements 14 are provided between the power factor correction filter 12 (PFC “Power Factor Correction”). For conventional operation of the charger, the switching elements 14 are switched so that a current flow from the alternating voltage source 11 to the electrical energy storage 2 is possible. If If a feedback process is to be carried out, the switching elements 14 are switched so that the output side A2 is connected to the input side 3. Furthermore, in this case the separating elements 8 are closed.
Bezugszeichenliste Reference symbol list
1 Ladevorrichtung 1 loading device
2 elektrischer Energiespeicher 2 electrical energy storage
3 Eingangsseite der Ladevorrichtung 3 Entry side of the loading device
4 fahrzeugexterne Ladeeinheit 4 vehicle-external charging unit
5 Ausgangsseite Ladevorrichtung 5 Output side loading device
6 erster Gleichspannungswandler 6 first DC-DC converter
7 zweiter Gleichspannungswandler 7 second DC-DC converter
8 Trennelemente 8 separators
9 EMV-Filter 9 EMC filters
10 integriertes Ladegerät 10 integrated charger
11 Wechselspannungsquelle 11 AC voltage source
12 Lei stu n g sfa kto rko rre ktu rf i I te r 12 Performance factor correction factor
13 AC-EMV-Filter 13 AC EMC filters
A1 Ausgangsseite des ersten GleichspannungswandlersA1 Output side of the first DC-DC converter
A2 Ausgangsseite des zweiten GleichspannungswandlersA2 Output side of the second DC-DC converter
E1 Eingangsseite des ersten GleichspannungswandlersE1 Input side of the first DC-DC converter
E2 Eingangsseite des zweiten GleichspannungswandlersE2 Input side of the second DC-DC converter
UA Ausgangsspannung UA output voltage
UE Eingangsspannung UE input voltage
UBatt Batteriespannung UBatt battery voltage
UR Rückspeise-Spannung UR feedback voltage

Claims

Patentansprüche Ladevorrichtung (1) zum Laden eines elektrischen Energiespeichers (2) eines Fahrzeugs, mit Claims Charging device (1) for charging an electrical energy storage (2) of a vehicle, with
- einer Eingangsseite (3) zum Verbinden der Ladevorrichtung (1) mit einer fahrzeugexternen Ladeeinheit (4), - an input side (3) for connecting the charging device (1) to a charging unit (4) external to the vehicle,
- einer Ausgangsseite (5) zum Verbinden der Ladevorrichtung (1) mit dem elektrischen Energiespeicher (2) des Fahrzeugs, - an output side (5) for connecting the charging device (1) to the electrical energy storage (2) of the vehicle,
- einem ersten Gleichspannungswandler (6), welcher zwischen der Eingangsseite (3) und der Ausgangsseite (5) verschaltet ist, zum Bereitstellen einer Ausgangsspannung (UA) an der Ausgangsseite abhängig von einer Eingangsspannung (UE) der Eingangsseite (3), wobei der erster Gleichspannungswandler (6) selbst nicht bidirektional, also nur unidirektional ausgeführt ist, gekennzeichnet, durch - a first DC-DC converter (6), which is connected between the input side (3) and the output side (5), for providing an output voltage (UA) on the output side depending on an input voltage (UE) on the input side (3), the first DC-DC converter (6) itself is not bidirectional, i.e. only unidirectional, characterized by
- einen zweiten Gleichspannungswandler (7), welcher parallel zum ersten Gleichspannungswandler (6) verschaltet ist, zum Bereitstellen einer Rückspeise- Spannung (UR) an der Eingangsseite (3) abhängig von einer Batteriespannung (UBatt) an der Ausgangsseite (5) so dass eine Rückspeisung von Energie nur über den zweiten Gleichspannungswandler (7) ermöglicht ist. Ladevorrichtung (1) nach Anspruch 1 , dadurch gekennzeichnet, dass der zweite Gleichspannungswandler (7) zumindest gegenüber der Eingangsseite (3) galvanisch trennbar ist. Ladevorrichtung (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass zwischen der Ausgangsseite (5) und dem zweiten Gleichspannungswandler (7) ein EMV-Filter (9) angeordnet ist. Ladevorrichtung (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der zweite Gleichspannungswandler (7) Bestandteil eines integrierten Ladegeräts- a second DC-DC converter (7), which is connected in parallel to the first DC-DC converter (6), for providing a feedback voltage (UR) on the input side (3) depending on a battery voltage (UBatt) on the output side (5), so that a Energy recovery is only possible via the second DC-DC converter (7). Charging device (1) according to claim 1, characterized in that the second DC-DC converter (7) can be galvanically isolated at least from the input side (3). Loading device (1) according to claim 1 or 2, characterized in that An EMC filter (9) is arranged between the output side (5) and the second DC-DC converter (7). Charging device (1) according to one of the preceding claims, characterized in that the second DC-DC converter (7) is part of an integrated charger
(10) des Fahrzeugs ist. (10) of the vehicle.
PCT/EP2023/060180 2022-04-25 2023-04-19 Charging device for directionally charging an electric energy store of a motor vehicle WO2023208693A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020007840A1 (en) 2020-12-21 2021-11-04 Daimler Ag Boost converter for charging an electrical energy store of an electrically powered vehicle, as well as vehicle and method
EP3922504A1 (en) * 2019-06-25 2021-12-15 Huawei Digital Power Technologies Co., Ltd. Vehicle-mounted charging/discharging apparatus and system
CN114172242A (en) * 2021-12-13 2022-03-11 国网电动汽车服务有限公司 Bidirectional charging and discharging system and control method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3922504A1 (en) * 2019-06-25 2021-12-15 Huawei Digital Power Technologies Co., Ltd. Vehicle-mounted charging/discharging apparatus and system
DE102020007840A1 (en) 2020-12-21 2021-11-04 Daimler Ag Boost converter for charging an electrical energy store of an electrically powered vehicle, as well as vehicle and method
CN114172242A (en) * 2021-12-13 2022-03-11 国网电动汽车服务有限公司 Bidirectional charging and discharging system and control method thereof

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