EP2734401A2 - Charging device having a secondary power supply unit - Google Patents

Charging device having a secondary power supply unit

Info

Publication number
EP2734401A2
EP2734401A2 EP12738093.9A EP12738093A EP2734401A2 EP 2734401 A2 EP2734401 A2 EP 2734401A2 EP 12738093 A EP12738093 A EP 12738093A EP 2734401 A2 EP2734401 A2 EP 2734401A2
Authority
EP
European Patent Office
Prior art keywords
charging
power supply
voltage battery
auxiliary power
low
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.)
Withdrawn
Application number
EP12738093.9A
Other languages
German (de)
French (fr)
Inventor
Robert Griessbach
Robert Wagner
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP2734401A2 publication Critical patent/EP2734401A2/en
Withdrawn legal-status Critical Current

Links

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
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/20—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having different nominal voltages
    • 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
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
    • 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
    • B60L53/14—Conductive energy transfer
    • 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
    • B60L2210/00—Converter types
    • B60L2210/10—DC to DC converters
    • B60L2210/12—Buck 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
    • B60L2270/00—Problem solutions or means not otherwise provided for
    • B60L2270/20—Inrush current reduction, i.e. avoiding high currents when connecting the battery
    • 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
    • Y02T90/12—Electric charging stations
    • 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 a charging device for electric vehicles, comprising an external AC voltage source and a motor vehicle with a high-voltage battery, wherein the
  • Electronic charging unit with a charging voltage input and a
  • Supply voltage input has.
  • the motor vehicle has a bidirectional auxiliary power supply with two interfaces.
  • the first interface of the auxiliary power supply is parallel to
  • the second interface of the auxiliary power supply and the low-voltage battery are connected in parallel to the supply voltage input of the electronic charging unit.
  • the bidirectionality of the auxiliary power supply and the circuitry integration of the auxiliary power supply in the charging device have the advantage that electrical power can be transferred via the auxiliary power supply from the voltage applied to the supply voltage input of the charging electronics unit electric wheel of the charging device to the charging voltage input of the charging electronics unit path and vice versa.
  • the motor vehicle has a charge control device and there is a charging connection between the motor vehicle and the outer
  • the low-voltage battery supplies the charging electronics unit and the
  • the auxiliary power supply unit charges the intermediate circuit capacitor in order to limit an inrush current to the charging electronics unit when the charging connection is made and when the intermediate circuit capacitor is charged.
  • DC link capacitor enables compliance with product-specific
  • the charge control device is electrically supplied via a control line from the external voltage source in case of defective or deeply discharged low-voltage battery and produced charging connection for charging the high-voltage battery.
  • the auxiliary power supply is via the first interface of the auxiliary power supply from the external AC power source can be supplied electrically and feeds the supply voltage input of the charging electronics unit via the second interface of the auxiliary power supply.
  • the charging electronics unit is supplied by the low-voltage battery in the ordinary operating case, the vehicle can be charged in the event of a breakdown of a defective or empty low-voltage battery. In the event of a breakdown, the
  • a DC chopper can convert the electrical voltage between the high-voltage battery and the low-voltage battery, so that the low-voltage battery can be charged via the DC chopper.
  • the low-voltage battery in the case of a discharge or
  • Deep discharge can also be charged via the external AC voltage source. So in the case of a lack of in-vehicle low-voltage supply, both the high-voltage battery and the low-voltage battery can be charged. As a result, the integration of the bidirectional power supply contributes to the robustness of the charging device, as a high availability for the customer is also achieved outside the intended use of the charging device. The notion of robustness also implies that an occurred defect can be eliminated. In the described embodiment, this is given in the case of a discharged or deeply discharged battery due to the recharging of the low-voltage battery.
  • the invention is based on the following considerations:
  • the charging of the high-voltage battery is usually carried out via a charging device with an on-board charger, which is connected via a special, standardized interface with logic and contactors to the AC mains (eg house network).
  • the charger is supplied with the operating voltage via the low-voltage vehicle electrical system.
  • the inrush current must be limited to the on-board charger to comply with product-specific guidelines under the CE Marking to suffice.
  • various, the contactors complementary circuits are known, which mean a considerable technical effort and thereby contribute to increasing complexity of the system. Additional electrical losses of
  • an auxiliary power supply can be integrated, which over the
  • Low-voltage battery of the vehicle loads a DC link capacitor before the contactors are closed. This limits the inrush current, which can also be called the inrush current. In this way, the CE conformity of the charger can be achieved.
  • the auxiliary power supply is bidirectional and connected to the charger, there is another advantage that also contributes to the robustness of the charging device. For the intended exceptional case that the on-board charger of the low-voltage battery can not be supplied (eg due to a deep discharge of the battery or a defect in the battery) and the DC link capacitor can not be charged, the charger is powered by the auxiliary power supply via the home network , This allows the vehicle to be charged even when the low-voltage battery is empty.
  • Fig. 1 shows a charging device of a vehicle (1) with a high-voltage battery (2).
  • the high-voltage battery also known as high-voltage storage, can be connected to an external
  • the vehicle has a charging electronics unit (8) with a charging voltage input (9) and a
  • the charging electronics unit consists of a DC-DC converter, which is preceded by a rectifier (5).
  • the Electronic charging unit is monitored and controlled by a charging control unit (7).
  • the Charge management is implemented in the form of software on the charging controller.
  • a charging connection is established between the vehicle and the external AC voltage source.
  • the AC voltage source can be a 1-phase network with a phase line (17) and neutral (14) or as a three-phase network with three
  • the charging connection includes a control line (20) between the charging controller and the AC power source for monitoring and controlling the charging process.
  • the charging connection in each case provides a contactor for the phase line or phase lines in the case of 3-phase alternating current (19) and the neutral conductor (16).
  • the charging connection can be designed, for example, with a charging cable and a plug-socket connection system (15, 18, 21).
  • Supply voltage input of the charging electronics unit is powered by a 12 volt battery (4) in a 14 volt power supply of the vehicle.
  • This low-voltage battery can be designed as a lead-acid battery.
  • the low-voltage battery (4) feeds a bidirectional auxiliary power supply (11) via a first interface (13) of the auxiliary power supply.
  • the first interface is also connected to the supply voltage input of the charging electronics unit.
  • the auxiliary power supply has a second interface (12), which is connected via an intermediate circuit capacitor (6) in parallel with the charging voltage input of the charging electronics unit.
  • the auxiliary power supply can be designed, for example, as a bidirectional DC-DC switched-mode power supply.
  • the transmission of electrical power between the high-voltage battery and the low-voltage battery is made possible by a DC-DC converter (22).
  • the charging connection is made by the vehicle user.
  • the DC link capacitor is charged via the low-voltage battery and the auxiliary power supply. This is only possible in the charged state of the DC link capacitor
  • Charging electronics unit This ensures the conformity of the loader with product-specific approval guidelines and technical standards, e.g. the CE marking guidelines or the IEC 60555 standard.
  • auxiliary power supply also allows a supply of
  • Charge management which detects the lack of voltage of the low-voltage battery by a suitable sensing, closed, it comes on the one hand, although a high inrush current. Due to the exceptional case outside the intended system state, this is tolerable.
  • the auxiliary power supply is fed via the second interface with rectified alternating current, that is, with substantially pulsed direct current. About the first interface of the auxiliary power supply thus the supply voltage input of
  • the low-voltage battery can also be charged while charging the high-voltage battery.
  • the cause of the exception, i. the discharge state of the low-voltage battery is thus compensated by the charging device during a charging process.
  • the charging device in FIG. 1 thus has an enormous robustness, which ensures a high degree of reliability and customer availability of the charging device and of the vehicle.
  • the robustness of the system enables customer-friendly operation even in the event of an emergency or breakdown.
  • the user has to establish a charging connection in the same way as in a conventional charging operation in normal operation in order to restore the operational readiness of the vehicle. It does not need to be made additional electrical connection such as with Fremdstarttivn to a foreign vehicle or other auxiliary power source.
  • Any interpolation points or poles, including a polarity reversal protection device, as known to the person skilled in the art, for example, from conventional internal combustion engine vehicles for carrying out a foreign start, can therefore be dispensed with.

Abstract

The invention relates to a charging device, comprising an external AC voltage source (3) and a motor vehicle (1) with a high-voltage battery (2), the motor vehicle comprising a low-voltage battery (4), an intermediate circuit capacitor (6) and a charge electronics unit (8) with a charge voltage input (9) and a supply voltage input (10), and the charging device being designed such that the motor vehicle comprises a bidirectional secondary power supply unit (11) with two interfaces, the first interface (13) of the secondary power supply unit being connected in parallel to the intermediate circuit capacitor and in parallel to the charge voltage input of the charge electronics unit, and the second interface (12) of the secondary power supply unit and the low-voltage battery being connected in parallel to the supply voltage input of the charge electronics unit.

Description

Ladevorrichtung mit Hilfsnetzteil  Charger with auxiliary power supply
Die Erfindung betrifft eine Ladevorrichtung für Elektrofahrzeuge, umfassend eine äußere Wechselspannungsquelle und ein Kraftfahrzeug mit einer Hochvoltbatterie, wobei das The invention relates to a charging device for electric vehicles, comprising an external AC voltage source and a motor vehicle with a high-voltage battery, wherein the
Kraftfahrzeug über eine Niedervoltbatterie, einen Zwischenkreiskondensator und eine Motor vehicle via a low-voltage battery, a DC link capacitor and a
Ladeelektronikeinheit mit einem Ladespannungseingang und einem Electronic charging unit with a charging voltage input and a
Versorgungsspannungseingang verfügt. Supply voltage input has.
An die Ladevorrichtung eines Elektrofahrzeugs werden diverse Anforderungen wie hoher Bedienkomfort, hohe Flexibilität des Anwenders und hohe Ladeleistung gestellt, die häufig zu sehr komplexen und kostenintensiven Lösungen führen. Dadurch wird auch die Erfüllung von Mindestanforderungen bei Langlebigkeit, Robustheit und Kundenverfügbarkeit zusätzlich erschwert. In diesem Spannungsfeld bewegen sich beispielsweise Schaltungen nach dem Stand der Technik, die den Einschaltstrom, d.h. den Inrush-Current, bei Herstellung einer Ladeverbindung durch Anstecken eines Ladekabels und Schließen von Schützen begrenzen sollen. Beispielsweise kann der Einschaltstrom durch einen Widerstand begrenzt werden, der nach dem Auftreten des Einschaltstroms etwa durch Schalten eines Relais überbrückt werden kann. Die Begrenzung des Einschaltstroms stellt einerseits vorgeschriebene Konformitäten wie z.B. mit der CE-Kennzeichnung sicherheits- und gesundheitsrelevanter Produkte zur To the charging device of an electric vehicle various requirements such as ease of use, high flexibility of the user and high charging power are provided, which often lead to very complex and costly solutions. This also complicates the fulfillment of minimum requirements for longevity, robustness and customer availability. For example, in this voltage field, prior art circuits that control the inrush current, i. To limit the inrush current when making a charging connection by plugging in a charging cable and closing contactors. For example, the inrush current can be limited by a resistor, which can be bridged by the switching of a relay after the occurrence of the inrush current. The limitation of the inrush current, on the one hand, imposes prescribed conformations, such as with the CE marking of safety and health relevant products for
Gewährleistung des freien Warenverkehrs sicher. Andererseits gehen mit einer solchen Einschaltstrom-Begrenzungsschaltung beim Laden des Elektrofahrzeugs zusätzliche Verluste einher, die einen schlechteren Ladewirkungsgrad bedeuten. Ensuring the free movement of goods safely. On the other hand, go with such inrush current limiting circuit when charging the electric vehicle additional losses that mean a poorer charging efficiency.
Es ist eine Aufgabe der Erfindung, eine verbesserte Ladevorrichtung für ein Elektrofahrzeug anzugeben. It is an object of the invention to provide an improved charging device for an electric vehicle.
Gelöst wird diese Aufgabe durch eine Ladevorrichtung mit Hilfsnetzteil gemäß Anspruch 1. Vorteilhafte Ausführungsformen und Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen. This object is achieved by a charging device with auxiliary power supply according to claim 1. Advantageous embodiments and modifications of the invention will become apparent from the dependent claims.
Erfindungsgemäß verfügt das Kraftfahrzeug über ein bidirektionales Hilfsnetzteil mit zwei Schnittstellen. Die erste Schnittstelle des Hilfsnetzteils ist parallel zum According to the invention, the motor vehicle has a bidirectional auxiliary power supply with two interfaces. The first interface of the auxiliary power supply is parallel to
Zwischenkreiskondensator und parallel zum Ladespannungseingang der Ladeelektronikeinheit geschaltet. Die zweite Schnittstelle des Hilfsnetzteils und die Niedervoltbatterie sind parallel zum Versorgungsspannungseingang der Ladeelektronikeinheit geschaltet. DC link capacitor and parallel to the charging voltage input of the charging electronics unit connected. The second interface of the auxiliary power supply and the low-voltage battery are connected in parallel to the supply voltage input of the electronic charging unit.
Die Bidirektionalität des Hilfsnetzteils und die schaltungstechnische Integration des Hilfsnetzteils in der Ladevorrichtung bieten den Vorteil, dass elektrische Leistung über das Hilfsnetzteil vom am Versorgungsspannungseingang der Ladeelektronikeinheit anliegenden elektrischen Rad der Ladevorrichtung zum am Ladespannungseingang der Ladeelektronikeinheit anliegenden Pfad transferierbar ist und umgekehrt. The bidirectionality of the auxiliary power supply and the circuitry integration of the auxiliary power supply in the charging device have the advantage that electrical power can be transferred via the auxiliary power supply from the voltage applied to the supply voltage input of the charging electronics unit electric wheel of the charging device to the charging voltage input of the charging electronics unit path and vice versa.
Gemäß einer bevorzugten Ausführungsform der Erfindung zum Laden der Hochvoltbatterie an der äußeren Wechselspannungsquelle weist das Kraftfahrzeug ein Ladesteuergerät auf und es ist eine Ladeverbindung zwischen dem Kraftfahrzeug und der äußeren According to a preferred embodiment of the invention for charging the high-voltage battery to the external AC voltage source, the motor vehicle has a charge control device and there is a charging connection between the motor vehicle and the outer
Wechselspannungsquelle hersteilbar. Die Niedervoltbatterie speist den Wechselspannungsquelle hersteilbar. The low-voltage battery feeds the
Versorgungsspannungseingang der Ladeelektronikeinheit und stellt die elektrische Versorgung des Ladesteuergerätes und des Hilfsnetzteils über die zweite Schnittstelle des Hilfsnetzteils sicher. Supply voltage input of the charging electronics unit and ensures the electrical supply of the charging control unit and the auxiliary power supply via the second interface of the auxiliary power supply.
Mit anderen Worten versorgt die Niedervoltbatterie die Ladeelektronikeinheit und das In other words, the low-voltage battery supplies the charging electronics unit and the
Hilfsnetzteil elektrisch. Auxiliary power supply electrical.
Vorteilhaft ist es, wenn das Hilfsnetzteil den Zwischenkreiskondensator lädt, um bei Herstellung der Ladeverbindung und bei geladenem Zwischenkreiskondensator einen Einschaltstrom in die Ladeelektronikeinheit zu begrenzen. It is advantageous if the auxiliary power supply unit charges the intermediate circuit capacitor in order to limit an inrush current to the charging electronics unit when the charging connection is made and when the intermediate circuit capacitor is charged.
Die Begrenzung des Einschaltstroms durch eine gezielte Ladung des The limitation of the inrush current by a targeted charge of the
Zwischenkreiskondensators ermöglicht die Einhaltung von produktspezifischen DC link capacitor enables compliance with product-specific
Sicherheitsstandards, die beispielsweise im Rahmen der CE-Kennzeichnung vorgeschrieben sein können. Neben der Produktsicherheit wirkt sich die Begrenzung des Einschaltstroms auch vorteilhaft auf die Zuverlässigkeit und Langlebigkeit der Ladevorrichtung aus. Safety standards that may be required, for example, under the CE marking. In addition to product safety, the limitation of the inrush current also has an advantageous effect on the reliability and longevity of the charging device.
Nach einer weiteren Ausführungsform ist bei defekter oder tiefentladener Niedervoltbatterie und bei hergestellter Ladeverbindung zum Laden der Hochvoltbatterie das Ladesteuergerät über eine Steuerleitung von der äußeren Spannungsquelle elektrisch versorgbar. Das Hilfsnetzteil ist über die erste Schnittstelle des Hilfsnetzteils von der äußeren Wechselspannungsquelle elektrisch versorgbar und speist den Versorgungsspannungseingang der Ladeelektronikeinheit über die zweite Schnittstelle des Hilfsnetzteils. According to a further embodiment, the charge control device is electrically supplied via a control line from the external voltage source in case of defective or deeply discharged low-voltage battery and produced charging connection for charging the high-voltage battery. The auxiliary power supply is via the first interface of the auxiliary power supply from the external AC power source can be supplied electrically and feeds the supply voltage input of the charging electronics unit via the second interface of the auxiliary power supply.
Damit ist sichergestellt, dass die Hochvoltbatterie des Fahrzeugs auch bei ausbleibender elektrischer Leistungsabgabe der Niedervoltbatterie über das äußere Stromnetz und die Ladeelektronikeinheit geladen werden kann. Obwohl die Ladeelektronikeinheit im gewöhnlichen Betriebsfall von der Niedervoltbatterie versorgt wird, kann das Fahrzeug im Pannenfall einer defekten oder leeren Niedervoltbatterie geladen werden. Im Pannenfall werden das This ensures that the high-voltage battery of the vehicle can be charged even if there is no electrical power output of the low-voltage battery via the external power grid and the charging electronics unit. Although the charging electronics unit is supplied by the low-voltage battery in the ordinary operating case, the vehicle can be charged in the event of a breakdown of a defective or empty low-voltage battery. In the event of a breakdown, the
Ladesteuergerät und die Ladeelektronikeinheit vom externen Stromnetz versorgt. Ein Charging control unit and the charging electronics unit powered by the external power grid. One
Ladevorgang der Hochvoltbatterie hängt somit nicht von der Funktionalität der Charging the high-voltage battery thus does not depend on the functionality of
Niedervoltbatterie ab. Low-voltage battery from.
Außerdem kann ein Gleichstromsteller die elektrische Spannung zwischen der Hochvoltbatterie und der Niedervoltbatterie wandeln, so dass die Niedervoltbatterie über den Gleichstromsteller ladbar ist. In addition, a DC chopper can convert the electrical voltage between the high-voltage battery and the low-voltage battery, so that the low-voltage battery can be charged via the DC chopper.
Durch diese Ausführungsform ist die Niedervoltbatterie im Falle einer Entladung oder By this embodiment, the low-voltage battery in the case of a discharge or
Tiefentladung ebenfalls über die äußere Wechselspannungsquelle ladbar. Also können im Falle einer mangelnden fahrzeuginternen Niedervoltversorgung sowohl die Hochvoltbatterie als auch die Niedervoltbatterie geladen werden. Dadurch trägt die Integration des bidirektionalen Netzteils zur Robustheit der Ladevorrichtung bei, da eine hohe Verfügbarkeit für den Kunden auch außerhalb des bestimmungsgemäßen Anwendungsbereichs der Ladevorrichtung erzielt wird. Der Begriff der Robustheit beinhaltet außerdem, dass ein eingetretenes Fehlerbild beseitigt werden kann. Bei der beschriebenen Ausführungsform ist dies für den Fall einer entladenen oder tiefentladenen Batterie wegen der Wiederaufladung der Niedervoltbatterie gegeben. Deep discharge can also be charged via the external AC voltage source. So in the case of a lack of in-vehicle low-voltage supply, both the high-voltage battery and the low-voltage battery can be charged. As a result, the integration of the bidirectional power supply contributes to the robustness of the charging device, as a high availability for the customer is also achieved outside the intended use of the charging device. The notion of robustness also implies that an occurred defect can be eliminated. In the described embodiment, this is given in the case of a discharged or deeply discharged battery due to the recharging of the low-voltage battery.
Die Erfindung beruht auf den nachfolgend dargelegten Überlegungen: The invention is based on the following considerations:
Bei Elektrofahrzeugen erfolgt das Laden der Hochvolt-Batterie üblicherweise über eine Ladevorrichtung mit einem On-Board-Ladegerät, welches über ein spezielles, genormtes Interface mit Logik und Trennschützen an das Wechselspannungsnetz (z.B. Hausnetz) angeschlossen wird. Das Ladegerät wird über das Niedervoltbordnetz des Fahrzeugs mit der Betriebsspannung versorgt. Beim Schließen der Trennschütze muss der Einschaltstrom in das On-Board-Ladegerät begrenzt werden, um produktspezifischen Richtlinien im Rahmen der CE- Kennzeichnung zu genügen. Hierzu sind diverse, die Trennschütze ergänzende Schaltungen bekannt, die einen erheblichen technischen Aufwand bedeuten und dadurch zu einer steigenden Komplexität des Systems beitragen. Zusätzliche elektrische Verluste der In electric vehicles, the charging of the high-voltage battery is usually carried out via a charging device with an on-board charger, which is connected via a special, standardized interface with logic and contactors to the AC mains (eg house network). The charger is supplied with the operating voltage via the low-voltage vehicle electrical system. When closing the contactors, the inrush current must be limited to the on-board charger to comply with product-specific guidelines under the CE Marking to suffice. For this purpose, various, the contactors complementary circuits are known, which mean a considerable technical effort and thereby contribute to increasing complexity of the system. Additional electrical losses of
Ladeelektrik des Fahrzeugs und eine Verschlechterung des Wirkungsgrades für das Laden der Hochvolt-Batterie sind eine weitere Folge. Charging electrics of the vehicle and a deterioration of the efficiency for charging the high-voltage battery are another consequence.
Als verbessernde Maßnahme kann ein Hilfsnetzteil integriert werden, das über die  As an improvement measure, an auxiliary power supply can be integrated, which over the
Niedervoltbatterie des Fahrzeugs einen Zwischenkreiskondensator lädt, bevor die Trennschütze geschlossen werden. Damit wird der Einschaltstrom, der auch als Inrush-Current bezeichnet werden kann, begrenzt. Auf diese Weise ist die CE-Konformität der Ladevorrichtung erreichbar. Falls das Hilfsnetzteil bidirektional ausgeführt ist und mit dem Ladegerät verbunden ist, ergibt sich ein weiterer Vorteil, der ebenfalls zur Robustheit der Ladevorrichtung beiträgt. Für den bestimmungsgemäßen Ausnahmefall, dass das On-Board-Ladegerät von der Niedervoltbatterie nicht versorgt werden kann (z.B. aufgrund einer Tiefentladung der Batterie oder eines Defekts der Batterie) und der Zwischenkreiskondensator nicht geladen werden kann, ist das Ladegerät durch das Hilfsnetzteil über das Hausnetz versorgbar. Damit kann das Fahrzeug auch bei leerer Niedervoltbatterie geladen werden. Weitere Schaltungen, die zur Sicherstellung der Ladbarkeit des Hochvoltspeichers bei entladener Niedervoltbatterie notwendig sind, sind daher verzichtbar. Dadurch ist mit einem bidirektionalen Hilfsnetzteil eine robuste Ladevorrichtung mit hoher Verfügbarkeit, geringer Fehleranfälligkeit und hohen Sicherheitsstandards umsetzbar. Low-voltage battery of the vehicle loads a DC link capacitor before the contactors are closed. This limits the inrush current, which can also be called the inrush current. In this way, the CE conformity of the charger can be achieved. If the auxiliary power supply is bidirectional and connected to the charger, there is another advantage that also contributes to the robustness of the charging device. For the intended exceptional case that the on-board charger of the low-voltage battery can not be supplied (eg due to a deep discharge of the battery or a defect in the battery) and the DC link capacitor can not be charged, the charger is powered by the auxiliary power supply via the home network , This allows the vehicle to be charged even when the low-voltage battery is empty. Other circuits that are necessary to ensure the ability to charge the high-voltage accumulator when the low-voltage battery is discharged are therefore dispensable. As a result, with a bidirectional auxiliary power supply a robust charging device with high availability, low error rate and high security standards can be implemented.
Im Folgenden wird anhand der beigefügten Zeichnungen ein bevorzugtes Ausführungsbeispiel der Erfindung beschrieben. Daraus ergeben sich weitere Details, bevorzugte Hereinafter, a preferred embodiment of the invention will be described with reference to the accompanying drawings. This gives more details, preferred
Ausführungsformen und Weiterbildungen der Erfindung. Embodiments and developments of the invention.
Im Einzelnen zeigt schematisch In detail shows schematically
Fig. 1 Ladevorrichtung mit Hilfsnetzteil  Fig. 1 charging device with auxiliary power supply
Die Fig. 1 zeigt eine Ladevorrichtung eines Fahrzeugs (1) mit einer Hochvoltbatterie (2). Die Hochvoltbatterie, auch als Hochvoltspeicher bezeichnet, kann an einem äußeren Fig. 1 shows a charging device of a vehicle (1) with a high-voltage battery (2). The high-voltage battery, also known as high-voltage storage, can be connected to an external
Wechselspannungsnetz (3) geladen werden. Zum Laden verfügt das Fahrzeug über eine Ladeelektronikeinheit (8) mit einem Ladespannungseingang (9) und einem AC mains (3) are charged. For charging, the vehicle has a charging electronics unit (8) with a charging voltage input (9) and a
Versorgungsspannungseingang (10). Im Wesentlichen besteht die Ladeelektronikeinheit aus einem Gleichstromwandler, dem ein Gleichrichter (5) vorgeschaltet ist. Die Supply voltage input (10). Essentially, the charging electronics unit consists of a DC-DC converter, which is preceded by a rectifier (5). The
Ladeelektronikeinheit wird von einem Ladesteuergerät (7) überwacht und geregelt. Das Lademanagement ist in Form von Software auf dem Ladesteuergerät implementiert. Zum Laden der Hochvoltbatterie wird eine Ladeverbindung zwischen dem Fahrzeug und der externen Wechselspannungsquelle hergestellt. Die Wechselspannungsquelle kann als 1 -phasiges Netz mit einer Phasenleitung (17) sowie Neutralleiter (14) oder als 3-phasiges Netz mit drei Electronic charging unit is monitored and controlled by a charging control unit (7). The Charge management is implemented in the form of software on the charging controller. To charge the high-voltage battery, a charging connection is established between the vehicle and the external AC voltage source. The AC voltage source can be a 1-phase network with a phase line (17) and neutral (14) or as a three-phase network with three
Phasenleitungen sowie Neutralleiter ausgebildet sein. Die Ladeverbindung umfasst eine Steuerleitung (20) zwischen dem Ladesteuergerät und der Wechselspannungsquelle für die Überwachung und Steuerung des Ladevorgangs. Außerdem sieht die Ladeverbindung jeweils ein Schütz für die Phasenleitung bzw. Phasenleitungen bei 3-phasigem Wechselstrom (19) und den Neutralleiter (16) vor. Die Ladeverbindung kann beispielsweise mit ein Ladekabel und einem Stecker-Buchse-Anschlusssystem (15,18,21 ) ausgeführt sein. Der Be formed phase lines and neutral. The charging connection includes a control line (20) between the charging controller and the AC power source for monitoring and controlling the charging process. In addition, the charging connection in each case provides a contactor for the phase line or phase lines in the case of 3-phase alternating current (19) and the neutral conductor (16). The charging connection can be designed, for example, with a charging cable and a plug-socket connection system (15, 18, 21). Of the
Versorgungsspannungseingang der Ladeelektronikeinheit ist von einer 12 Volt-Batterie (4) in einem 14 Volt-Teilbordnetz des Fahrzeugs speisbar. Diese Niedervoltbatterie kann als Blei- Säure-Batterie ausgeführt sein. Außerdem speist die Niedervoltbatterie (4) ein bidirektionales Hilfsnetzteil (11) über eine erste Schnittstelle (13) des Hilfsnetzteils. Die erste Schnittstelle ist ebenfalls mit dem Versorgungsspannungseingang der Ladeelektronikeinheit verbunden. Das Hilfsnetzteil weist eine zweite Schnittstelle (12) auf, die über einen Zwischenkreiskondensator (6) parallel mit dem Ladespannungseingang der Ladeelektronikeinheit verbunden ist. Das Hilfsnetzteil kann beispielsweise als bidirektionales DC-DC-Schaltnetzteil ausgeführt sein. Die Übertragung elektrischer Leistung zwischen der Hochvoltbatterie und der Niedervoltbatterie wird durch einen Gleichstromsteller (22) ermöglicht. Supply voltage input of the charging electronics unit is powered by a 12 volt battery (4) in a 14 volt power supply of the vehicle. This low-voltage battery can be designed as a lead-acid battery. In addition, the low-voltage battery (4) feeds a bidirectional auxiliary power supply (11) via a first interface (13) of the auxiliary power supply. The first interface is also connected to the supply voltage input of the charging electronics unit. The auxiliary power supply has a second interface (12), which is connected via an intermediate circuit capacitor (6) in parallel with the charging voltage input of the charging electronics unit. The auxiliary power supply can be designed, for example, as a bidirectional DC-DC switched-mode power supply. The transmission of electrical power between the high-voltage battery and the low-voltage battery is made possible by a DC-DC converter (22).
Zum Laden der Hochvoltbatterie wird die Ladeverbindung durch den Fahrzeugnutzer hergestellt. Der Zwischenkreiskondensator wird über die Niedervoltbatterie und das Hilfsnetzteil geladen. Nur im geladenen Zustand des Zwischenkreiskondensators ermöglicht das To charge the high-voltage battery, the charging connection is made by the vehicle user. The DC link capacitor is charged via the low-voltage battery and the auxiliary power supply. This is only possible in the charged state of the DC link capacitor
Lademanagement über die Steuerleitung das Schließen der Trennschütze der Ladeverbindung und damit die Herstellung einer elektrisch leitenden Verbindung zwischen der Lademanagement via the control line closing the contactor of the charging connection and thus the establishment of an electrically conductive connection between the
Ladeelektronikeinheit und der äußeren Wechselspannungsquelle. Der geladene Charging electronics unit and the external AC power source. The loaded one
Zwischenkreiskondensator begrenzt effektiv einen hohen Einschaltstromfluss in die DC link capacitor effectively limits high inrush current flow into the DC link capacitor
Ladeelektronikeinheit. Dies stellt die Konformität der Ladevorrichtung mit produktspezifischen Zulassungsrichtlinien und technischen Normen sicher, z.B. der CE-Kennzeichnungsrichtlinien oder der Norm IEC 60555. Charging electronics unit. This ensures the conformity of the loader with product-specific approval guidelines and technical standards, e.g. the CE marking guidelines or the IEC 60555 standard.
Die bidirektionale Ausführung des Hilfsnetzteils ermöglicht auch eine Versorgung des The bidirectional design of the auxiliary power supply also allows a supply of
Hilfsnetzteils über die zweite Schnittstelle. Dies ist insbesondere vorteilhaft, wenn die Hochvoltbatterie des Fahrzeugs bei entladener oder defekter Niedervoltbatterie geladen werden soll. In diesem Pannenfall, der nicht den gewöhnlichen Betriebszustand der Ladevorrichtung darstellt, wird weder der Versorgungsspannungseingang der Ladeelektronikeinheit von der Niedervoltbatterie gespeist noch der Zwischenkreiskondensator geladen. Wird in diesem speziellen Fall eine Ladeverbindung hergestellt und werden die Trennschütze vom Auxiliary power supply via the second interface. This is particularly advantageous when the High-voltage battery of the vehicle to be loaded with discharged or defective low-voltage battery. In this breakdown case, which does not represent the normal operating state of the charging device, neither the supply voltage input of the charging electronics unit is powered by the low-voltage battery nor the link capacitor charged. If in this special case a charging connection is made and the contactors of the
Lademanagement, das die fehlende Spannung der Niedervoltbatterie durch eine geeignete Sensierung erkennt, geschlossen, kommt es einerseits zwar zu einem hohen Einschaltstrom. Aufgrund des Ausnahmefalls außerhalb des bestimmungsgemäßen Systemzustands ist dies tolerabel. Andererseits wird das Hilfsnetzteil über die zweite Schnittstelle mit gleichgerichtetem Wechselstrom, das heißt mit im Wesentlichen gepulstem Gleichstrom, gespeist. Über die erste Schnittstelle des Hilfsnetzteils wird somit der Versorgungsspannungseingang der Charge management, which detects the lack of voltage of the low-voltage battery by a suitable sensing, closed, it comes on the one hand, although a high inrush current. Due to the exceptional case outside the intended system state, this is tolerable. On the other hand, the auxiliary power supply is fed via the second interface with rectified alternating current, that is, with substantially pulsed direct current. About the first interface of the auxiliary power supply thus the supply voltage input of
Ladeelektronikeinheit elektrisch versorgt. Ein Ladevorgang der Hochvoltbatterie ist folglich auch im Ausnahmefall einer defekten Niedervoltbatterie durch die Bidirektionalität des Hilfsnetzteils sichergestellt. Über den Gleichstromsteller zwischen der Hochvoltbatterie und der Charging electronics unit electrically powered. A charging of the high-voltage battery is therefore ensured even in the exceptional case of a defective low-voltage battery by the bidirectionality of the auxiliary power supply. About the DC-DC converter between the high-voltage battery and the
Niedervoltbatterie kann die Niedervoltbatterie während des Ladevorgangs der Hochvoltbatterie ebenfalls geladen werden. Die Ursache des Ausnahmefalls, d.h. der Entladezustand der Niedervoltbatterie, ist somit durch die Ladevorrichtung während eines Ladevorgangs kompensierbar. Low-voltage battery, the low-voltage battery can also be charged while charging the high-voltage battery. The cause of the exception, i. the discharge state of the low-voltage battery is thus compensated by the charging device during a charging process.
Neben der Langlebigkeit und Haltbarkeit verfügt die Ladevorrichtung in Fig. 1 also über eine enorme Robustheit, die ein hohes Maß an Zuverlässigkeit und Kundenverfügbarkeit der Ladevorrichtung und des Fahrzeugs sicherstellt. Die Robustheit des Systems ermöglicht selbst bei einer Notfall- bzw. Pannensituation eine kundenfreundliche Bedienung. Der Nutzer hat auf die gleiche Art und Weise wie bei einem herkömmlichen Ladevorgang im Normalbetrieb eine Ladeverbindung herzustellen, um die Betriebsbereitschaft des Fahrzeugs wiederherzustellen. Es braucht keine zusätzliche elektrische Verbindung etwa mit Fremdstartkabeln zu einem Fremdfahrzeuge oder einer anderweitigen Hilfsstromquelle hergestellt werden. Etwaige Stützpunkte oder -pole inklusive einer Verpolschutzeinrichtung, wie sie dem Fachmann beispielsweise von konventionellen verbrennungsmotorischen Fahrzeugen zur Durchführung eines Fremdstarts bekannt sind, können also entfallen. Dadurch ist mit dieser einfachen Architektur auch ein Kostenvorteil verbunden. Bezugszeichenliste In addition to the longevity and durability, the charging device in FIG. 1 thus has an enormous robustness, which ensures a high degree of reliability and customer availability of the charging device and of the vehicle. The robustness of the system enables customer-friendly operation even in the event of an emergency or breakdown. The user has to establish a charging connection in the same way as in a conventional charging operation in normal operation in order to restore the operational readiness of the vehicle. It does not need to be made additional electrical connection such as with Fremdstartkabeln to a foreign vehicle or other auxiliary power source. Any interpolation points or poles, including a polarity reversal protection device, as known to the person skilled in the art, for example, from conventional internal combustion engine vehicles for carrying out a foreign start, can therefore be dispensed with. As a result, there is also a cost advantage associated with this simple architecture. LIST OF REFERENCE NUMBERS
1 Fahrzeug 1 vehicle
2 Hochvoltbatterie  2 high-voltage battery
3 Äußere Wechselspannungsquelle 3 External AC source
4 Niedervoltbatterie 4 low-voltage battery
5 Gleichrichter  5 rectifiers
6 Zwischenkreiskondensator 6 DC link capacitor
7 Ladesteuergerät 7 charging control unit
8 Ladeelektronikeinheit  8 charging electronics unit
9 Ladespannungseingang  9 charging voltage input
10 Versorgungsspannungseingang 10 supply voltage input
11 bidirektionales Hilfsnetzteil11 bidirectional auxiliary power supply
12 Zweite Schnittstelle 12 Second interface
13 Erste Schnittstelle  13 First interface
14 Neutralleitung  14 neutral line
15 Anschluss Neutralleitung 15 Neutral connection
16 Schütz Neutralleitung 16 contactor neutral line
17 Phasenleitung  17 phase line
18 Anschluss Phasenleitung 18 connection phase line
19 Schütz Phasenleitung 19 contactor phase line
20 Steuerleitung  20 control line
21 Anschluss Steuerleitung  21 Connection control line
22 Gleichstromsteller  22 DC chopper

Claims

Patentansprüche claims
1. Ladevorrichtung, umfassend eine äußere Wechselspannungsquelle (3) und ein A charging device comprising an external AC source (3) and a
Kraftfahrzeug (1) mit einer Hochvoltbatterie (2), wobei das Kraftfahrzeug über eine Niedervoltbatterie (4), einen Zwischenkreiskondensator (6) und eine  Motor vehicle (1) with a high-voltage battery (2), wherein the motor vehicle via a low-voltage battery (4), an intermediate circuit capacitor (6) and a
Ladeelektronikeinheit (8) mit einem Ladespannungseingang (9) und einem  Charging electronics unit (8) with a charging voltage input (9) and a
Versorgungsspannungseingang (10) verfügt,  Supply voltage input (10) has,
dadurch gekennzeichnet,  characterized,
- dass das Kraftfahrzeug ein bidirektionales Hilfsnetzteil (11 ) mit zwei Schnittstellen aufweist,  - That the motor vehicle has a bidirectional auxiliary power supply (11) with two interfaces,
- dass die erste Schnittstelle (13) des Hilfsnetzteils parallel zum  - That the first interface (13) of the auxiliary power supply parallel to
Zwischenkreiskondensator und parallel zum Ladespannungseingang der  DC link capacitor and parallel to the charging voltage input of
Ladeelektronikeinheit geschaltet ist, und  Charging electronics unit is connected, and
- dass die zweite Schnittstelle (12) des Hilfsnetzteils und die Niedervoltbatterie parallel zum Versorgungsspannungseingang der Ladeelektronikeinheit geschaltet sind.  - That the second interface (12) of the auxiliary power supply and the low-voltage battery are connected in parallel to the supply voltage input of the electronic charging unit.
2. Ladevorrichtung nach Anspruch 1 2. Loading device according to claim 1
dadurch gekennzeichnet,  characterized,
dass zum Laden der Hochvoltbatterie an der äußeren Wechselspannungsquelle that for charging the high-voltage battery to the external AC source
- das Kraftfahrzeug ein Ladesteuergerät (7) aufweist, the motor vehicle has a charge control device (7),
- eine Ladeverbindung zwischen dem Kraftfahrzeug und der äußeren  - A charging connection between the motor vehicle and the outer
Wechselspannungsquelle herstellbar ist,  AC voltage source can be produced,
- die Niedervoltbatterie den Versorgungsspannungseingang der Ladeelektronikeinheit speist,  - the low-voltage battery feeds the supply voltage input of the charging electronics unit,
- die Niedervoltbatterie das Ladesteuergerät elektrisch versorgt,  - the low-voltage battery supplies the charge controller electrically,
- die Niedervoltbatterie das Hilfsnetzteil über die zweite Schnittstelle des Hilfsnetzteils elektrisch versorgt. - The low-voltage battery supplies the auxiliary power supply via the second interface of the auxiliary power supply.
3. Ladevorrichtung nach Anspruch 2, 3. Loading device according to claim 2,
dadurch gekennzeichnet,  characterized,
- dass das Hilfsnetzteil den Zwischenkreiskondensator lädt, um bei Herstellung der  - That the auxiliary power supply unit loads the DC link capacitor in order to produce the
Ladeverbindung und bei geladenem Zwischenkreiskondensator einen Einschaltstrom in die Ladeelektronikeinheit zu begrenzen.  Charging connection and to limit an inrush current in the charging electronics unit with charged DC link capacitor.
4. Ladevorrichtung nach einem der Ansprüche 1 bis 3 4. Loading device according to one of claims 1 to 3
dadurch gekennzeichnet,  characterized,
dass bei defekter oder tiefentladener Niedervoltbatterie und bei hergestellter  that with defective or deeply discharged low-voltage battery and manufactured
Ladeverbindung  charging connection
- das Ladesteuergerät über eine Steuerleitung von der äußeren Spannungsquelle  - The charging controller via a control line from the external power source
elektrisch versorgbar ist,  is electrically supplied,
- das Hilfsnetzteil über die erste Schnittstelle des Hilfsnetzteils von der äußeren  - The auxiliary power supply via the first interface of the auxiliary power supply from the outside
Wechselspannungsquelle elektrisch versorgbar ist, und  AC power source is electrically powered, and
- das Hilfsnetzteil den Versorgungsspannungseingang der Ladeelektronikeinheit über die zweite Schnittstelle des Hilfsnetzteils speist.  - The auxiliary power supply feeds the supply voltage input of the charging electronics unit via the second interface of the auxiliary power supply.
5. Ladevorrichtung nach Anspruch 4, 5. Loading device according to claim 4,
dadurch gekennzeichnet,  characterized,
- dass ein Gleichstromsteller die elektrische Spannung zwischen der Hochvoltbatterie und der Niedervoltbatterie wandelt,  - that a DC-DC converter converts the electrical voltage between the high-voltage battery and the low-voltage battery,
- dass die Niedervoltbatterie über den Gleichstromsteller geladen wird.  - That the low-voltage battery is charged via the DC chopper.
EP12738093.9A 2011-07-18 2012-07-17 Charging device having a secondary power supply unit Withdrawn EP2734401A2 (en)

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Also Published As

Publication number Publication date
CN103687750B (en) 2016-10-19
WO2013011020A3 (en) 2013-04-04
DE102011079359A1 (en) 2013-01-24
US9227517B2 (en) 2016-01-05
CN103687750A (en) 2014-03-26
WO2013011020A2 (en) 2013-01-24
US20140132215A1 (en) 2014-05-15

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