EP1846268A1 - Voltage supply device for safety-relevant consumers - Google Patents

Voltage supply device for safety-relevant consumers

Info

Publication number
EP1846268A1
EP1846268A1 EP06700705A EP06700705A EP1846268A1 EP 1846268 A1 EP1846268 A1 EP 1846268A1 EP 06700705 A EP06700705 A EP 06700705A EP 06700705 A EP06700705 A EP 06700705A EP 1846268 A1 EP1846268 A1 EP 1846268A1
Authority
EP
European Patent Office
Prior art keywords
safety
batteries
electrical system
battery
voltage
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Withdrawn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
EP06700705A
Other languages
German (de)
French (fr)
Inventor
Wolfgang Haas
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1846268A1 publication Critical patent/EP1846268A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
    • H02J7/1423—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle with multiple batteries
    • 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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • 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
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/46—The network being an on-board power network, i.e. within a vehicle for ICE-powered road vehicles

Definitions

  • the invention relates to a device for power supply for safety-relevant consumers, in particular in a motor vehicle electrical system with the features of claim 1.
  • Vehicle electrical systems generally consist of a claw-pole generator, a lead-acid battery, a fuse and relay box and the cable harness for power distribution.
  • a variety of consumers are connected, others are connected via 12-volt sockets temporarily or switched on and off by means of suitable switch.
  • Accessories are connected to existing or new lines in addition to the electrical system.
  • An electrical system for redundant power supply for safety-relevant consumers which is also suitable for x-by-wire consumers, is known from DE 101 50 379 Al.
  • the safety-relevant consumers are each supplied via two separate supply lines with electrical energy.
  • Each consumer is connected via a first supply line to a first energy source and via a second supply line to a second energy source.
  • the other In the event of a failure of one of the energy sources or an error in one of the supply lines, the other each takes over the supply of the consumer and thus forms a redundant power supply system.
  • Between the first and the second energy source is still a bidirectional DC-DC converter, which can make voltage adjustments.
  • safety-relevant consumers are called in particular electric brakes.
  • the inventive device for power supply for safety-relevant consumers especially in a motor vehicle electrical system has the advantage of ensuring a stable, reliable power supply, in which the previous electrical structure in the electrical system of a vehicle can be maintained. Furthermore, it is advantageous that the device according to the invention can be constructed simpler than in the prior art.
  • additional measures are provided in a conventional vehicle electrical system only for the field of safety-relevant consumers, ie in particular the X-by-wire systems. These measures relate in particular to the decoupling of the power supply of the x-by-wire system from the rest of the electrical system by two separate voltage transformers. A buffering of the separated systems is taken over with the help of one battery per supply path.
  • a diode function can be realized in an advantageous manner, in which the energy flow is possible only in the direction of X-by-wire systems.
  • a particularly advantageous embodiment allows a pumping function, with which the voltage can be increased at predetermined locations. This pumping function ensures a stable supply of the X-by-wire system even with unstable remaining electrical system. Since an advantageous over- and undervoltage protection for the X-by-wire electrical system is obtained, the entire system, consisting of X-by-wire system and X-by-wire electrical system is fully functional even in case of disturbances. It is also particularly advantageous to ensure constant battery charge regardless of the voltage in the rest of the electrical system via at least one of the DC voltage converter. In general, an independent voltage level is possible because there is a so-called island vehicle network.
  • the use of one buffer battery per energy path has further advantages, namely, a smoothing of the voltage is obtained since buffering of load peaks of the X-by-wire system is possible.
  • the DC-DC converter can manage with low rates of change of the input current. As a result, the reaction of the X-by-wire system to the rest of the electrical system is adjustable.
  • the normal electrical system for supplying the vehicle consumers in block 1 is included.
  • This normal vehicle electrical system comprises in detail a generator G, a charge storage SP, in particular a battery, a starter S and consumers Vl, V2 and V3, via three associated fuses Sl, S2 and S3 and optionally switches SCH 1 and SCH 2 on the charge - A -
  • the memory SP and the generator G can be connected, wherein the control of the switch by means of switching signals SIG 1 can be done.
  • the consumers Vl and V2 can be connected in the illustrated normal electrical system, while the consumer V3 is a durable consumer to be supplied. Additional consumers can be connected in a similar way as the consumers V1 and V2.
  • the safety-relevant consumers in particular a so-called X-by-wire system are designated by 6. This system is divided into two circles K1 and K2. Each of these circuits is supplied separately with electrical energy.
  • Each path consists of a voltage converter (DC / DC converter) 2 or 3 and a charge storage or a battery 4 or 5.
  • the connection of the two separate energy paths is carried out so that the path with the voltage converter 2 and the battery is connected between the memory SP and the starter S and the energy path is connected to the voltage converter 3 between the generator G and the memory SP.
  • an electrical braking system can also be realized as an X-by-wire system, this preferably being a double-circuited electrical or electromechanical brake system.
  • the device according to the invention for supplying power to safety-relevant consumers with a first sub-electrical system comprising the generator, a memory, a starter and the conventional consumer and at least two safety-relevant consumers, which are in communication with at least two charge stores, in particular batteries, as described above, ie characterized in that the safety-relevant consumers are divided into two circuits K1 and K2 and each of these circuits K1 and K2 is connected to its own charge storage, in particular a battery 4, 5 and each of these charge storage 4, 5 is connected via a voltage converter 2, 3 with the usual electrical system 1 in conjunction.

Abstract

The invention relates to a voltage supply device for safety-relevant consumers, especially for x-by-wire systems in a vehicle on-board power supply system. The inventive device is characterized in that every x-by-wire system has its own battery and is connected to the conventional on-board power supply system via one respective voltage converter.

Description

Vorrichtung zur Spannungsversorgung für sicherheitsrelevante VerbraucherDevice for supplying power to safety-relevant consumers
Stand der TechnikState of the art
Die Erfindung betrifft eine Vorrichtung zur Spannungsversorgung für sicherheitsrelevante Verbraucher, insbesondere in einem Kraftfahrzeugbordnetz mit den Merkmalen des Anspruchs 1.The invention relates to a device for power supply for safety-relevant consumers, in particular in a motor vehicle electrical system with the features of claim 1.
Fahrzeugbordnetze bestehen im Allgemeinen aus einem Klauenpolgenerator, einer Blei- Säure-Batterie, einer Sicherungs- und Relaisbox und dem Kabelbaum zur Energieverteilung. An den Kabelbaum zur Energieverteilung sind eine Vielzahl von Verbrauchern angeschlossen, weitere werden über 12- Volt-Steckdosen temporär angeschlossen bzw. mittels geeigneter Schalter zu- und abgeschaltet. Zubehörteile werden an bestehende oder neue Leitungen zusätzlich ans Bordnetz angeschlossen.Vehicle electrical systems generally consist of a claw-pole generator, a lead-acid battery, a fuse and relay box and the cable harness for power distribution. To the wiring harness for power distribution, a variety of consumers are connected, others are connected via 12-volt sockets temporarily or switched on and off by means of suitable switch. Accessories are connected to existing or new lines in addition to the electrical system.
Durch die große Anzahl und die Verschiedenheit der angeschlossenen Komponenten, durch die vielen Kabel, die im gesamten Fahrzeug verlegt sind, durch die große Zahl von Kontaktstellen sowie durch die beliebige Manipulierbarkeit im Feld ergibt sich eine Situation, in der die stabile Funktion der Energieversorgung nicht immer garantiert werden kann. Dies kann zu Pannen durch elektrische Probleme führen. In Folge dieser Zuverlässigkeitssituation ist es nicht möglich, sicherheitsrelevante Verbraucher zuverlässig zu versorgen, die für ihre Funktion auf elektrische Energie angewiesen sind. Solche Verbraucher sind bspw. X-by-Wire- Verbraucher.Due to the large number and diversity of the connected components, the many cables that are installed throughout the vehicle, the large number of contact points as well as the arbitrary manipulability in the field results in a situation in which the stable function of the power supply is not always can be guaranteed. This can lead to breakdowns due to electrical problems. As a result of this reliability situation, it is not possible to reliably supply safety-relevant consumers who are dependent on electrical energy for their function. Such consumers are, for example, x-by-wire consumers.
Ein Bordnetz zur redundanten Energieversorgung für sicherheitsrelevante Verbraucher, das auch für X-by-Wire- Verbraucher geeignet ist, ist aus der DE 101 50 379 Al bekannt. In diesem bekannten Bordnetz werden die sicherheitsrelevanten Verbraucher jeweils über zwei separate Versorgungsleitungen mit elektrischer Energie versorgt. Dabei ist jeder Verbraucher über eine erste Versorgungsleitung an eine erste Energiequelle und über eine zweite Versorgungsleitung an eine zweite Energiequelle angeschlossen. Bei einem Ausfall einer der Energiequellen oder einem Fehler in einer der Versorgungsleitungen übernimmt jeweils die andere die Versorgung des Verbrauchers und bildet so ein redundantes Spannungsversorgungssystem. Zwischen der ersten und der zweiten Energiequelle liegt noch ein bidirektionaler Gleichspannungswandler, der Spannungsanpassungen vornehmen kann. Als sicherheitsrelevante Verbraucher werden insbesondere elektrische Bremsen genannt.An electrical system for redundant power supply for safety-relevant consumers, which is also suitable for x-by-wire consumers, is known from DE 101 50 379 Al. In this known electrical system, the safety-relevant consumers are each supplied via two separate supply lines with electrical energy. Each consumer is connected via a first supply line to a first energy source and via a second supply line to a second energy source. In the event of a failure of one of the energy sources or an error in one of the supply lines, the other each takes over the supply of the consumer and thus forms a redundant power supply system. Between the first and the second energy source is still a bidirectional DC-DC converter, which can make voltage adjustments. As safety-relevant consumers are called in particular electric brakes.
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäße Vorrichtung zur Spannungsversorgung für sicherheitsrelevante Verbraucher insbesondere in einem Kraftfahrzeugbordnetz hat den Vorteil der Sicherstellung einer stabilen, zuverlässigen Spannungsversorgung, bei der die bisherige elektrische Struktur im Bordnetz eines Fahrzeugs beibehalten werden kann. Weiterhin ist vorteilhaft, dass die erfindungsgemäße Vorrichtung einfacher als beim Stand der Technik aufgebaut werden kann. Erzielt werden diese Vorteile, indem in einem herkömmlichen Fahrzeugbordnetz lediglich für den Bereich der sicherheitsrelevanten Verbraucher, also insbesondere der X-by-Wire-Systeme zusätzliche Maßnahmen vorgesehen sind. Diese Maßnahmen betreffen insbesondere die Entkopplung der Energieversorgung des X-by-Wire- Systems vom restlichen Bordnetz durch zwei getrennte Spannungswandler. Eine Pufferung der getrennten Systeme wird mit Hilfe je einer Batterie pro Versorgungspfad übernommen.The inventive device for power supply for safety-relevant consumers, especially in a motor vehicle electrical system has the advantage of ensuring a stable, reliable power supply, in which the previous electrical structure in the electrical system of a vehicle can be maintained. Furthermore, it is advantageous that the device according to the invention can be constructed simpler than in the prior art. These advantages are achieved by additional measures are provided in a conventional vehicle electrical system only for the field of safety-relevant consumers, ie in particular the X-by-wire systems. These measures relate in particular to the decoupling of the power supply of the x-by-wire system from the rest of the electrical system by two separate voltage transformers. A buffering of the separated systems is taken over with the help of one battery per supply path.
Weitere Vorteile der Erfindung werden durch die in den Unteransprüchen angegebenen Maßnahmen erzielt. So lässt sich in vorteilhafter Weise eine Diodenfunktion realisieren, bei der der Energiefluss nur in Richtung X-by-Wire-Systemen möglich ist. Eine besonders vorteilhafte Ausgestaltung ermöglicht eine Pumpfunktion, mit der die Spannung an vorgebbaren Stellen erhöht werden kann. Diese Pumpfunktion gewährleistet eine stabile Versorgung des X-by-Wire-Systems selbst bei instabilem restlichen Bordnetz. Da ein vorteilhafter Über- und Unterspannungsschutz für das X-by-Wire-Bordnetz erhalten wird, ist das Gesamtsystem, bestehend aus X-by-Wire-System und X-by-Wire- Bordnetz auch bei Störungen voll funktionsfähig. Besonders vorteilhaft ist auch die Sicherstellung ständiger Batterieladung unabhängig von der Spannung im restlichen Bordnetz über wenigstens einen der Gleichspannungswandler. Generell ist eine unabhängige Spannungslage möglich, da ein so genanntes Inselbordnetz vorhanden ist.Further advantages of the invention are achieved by the measures specified in the dependent claims. Thus, a diode function can be realized in an advantageous manner, in which the energy flow is possible only in the direction of X-by-wire systems. A particularly advantageous embodiment allows a pumping function, with which the voltage can be increased at predetermined locations. This pumping function ensures a stable supply of the X-by-wire system even with unstable remaining electrical system. Since an advantageous over- and undervoltage protection for the X-by-wire electrical system is obtained, the entire system, consisting of X-by-wire system and X-by-wire electrical system is fully functional even in case of disturbances. It is also particularly advantageous to ensure constant battery charge regardless of the voltage in the rest of the electrical system via at least one of the DC voltage converter. In general, an independent voltage level is possible because there is a so-called island vehicle network.
Der Einsatz von je einer Pufferbatterie je Energiepfad hat weitere Vorteile, nämlich es wird eine Glättung der Spannung erhalten, da eine Pufferung von Lastspitzen des X-by- Wire-Systems möglich ist. Es besteht eine Energiereserve bei einem Defekt eines Spannungswandlers. Da zwei unabhängige Energiespeicher vorhanden sind, besteht eine vollständige Redundanz, sodass auch Fahrzeugbremsen als X-by-Wire-Systeme eingesetzt werden können. Durch die Pufferung von Lastspitzen durch die Batterie kann der Gleichspannungswandler mit geringen Änderungsgeschwindigkeiten des Eingangsstromes auskommen. Dadurch ist die Rückwirkung des X-by-Wire-Systems auf das restliche Bordnetz einstellbar.The use of one buffer battery per energy path has further advantages, namely, a smoothing of the voltage is obtained since buffering of load peaks of the X-by-wire system is possible. There is an energy reserve in case of a defect of a voltage transformer. Since there are two independent energy stores, there is complete redundancy, so that vehicle brakes can also be used as X-by-wire systems. By buffering load peaks by the battery, the DC-DC converter can manage with low rates of change of the input current. As a result, the reaction of the X-by-wire system to the rest of the electrical system is adjustable.
Weitere Vorteile bestehen darin, dass eine Manipulation am System schnell und einfach erkennbar ist, dass eine modellbasierte Diagnose des Versorgungssystems möglich ist und dass nur ein geringer Aufwand zur Steuerung des Gesamtsystems benötigt wird.Further advantages are that a manipulation of the system is quickly and easily recognizable, that a model-based diagnosis of the supply system is possible and that only little effort is required to control the entire system.
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung ist in der einzigen Figur der Zeichnung dargestellt und wird in der nachfolgenden Beschreibung näher erläutert.An embodiment of the invention is illustrated in the single figure of the drawing and will be explained in more detail in the following description.
Beschreibungdescription
Bei dem in der Figur dargestellten Ausführungsbeispiel einer Vorrichtung zur Spannungsversorgung für sicherheitsrelevante Verbraucher ist das normale Bordnetz zur Versorgung der Fahrzeugverbraucher im Block 1 enthalten. Dieses normale Bordnetz um- fasst im Einzelnen einen Generator G, einen Ladungsspeicher SP, insbesondere eine Batterie, einen Starter S sowie Verbraucher Vl, V2 und V3, die über drei zugehörige Sicherungen Sl, S2 und S3 sowie gegebenenfalls Schalter SCH 1 und SCH 2 an den Ladungs- - A -In the embodiment of a device for power supply for safety-relevant consumers shown in the figure, the normal electrical system for supplying the vehicle consumers in block 1 is included. This normal vehicle electrical system comprises in detail a generator G, a charge storage SP, in particular a battery, a starter S and consumers Vl, V2 and V3, via three associated fuses Sl, S2 and S3 and optionally switches SCH 1 and SCH 2 on the charge - A -
speicher SP bzw. den Generator G anschließbar sind, wobei die Ansteuerung der Schalter mittels Schaltsignalen SIG 1 erfolgen kann. Die Verbraucher Vl und V2 sind bei dem dargestellten normalen Bordnetz zuschaltbar, während der Verbraucher V3 ein dauerhaft zu versorgender Verbraucher ist. Weitere Verbraucher können auf ähnliche Weise wie die Verbraucher Vl und V2 angeschlossen werden.memory SP and the generator G can be connected, wherein the control of the switch by means of switching signals SIG 1 can be done. The consumers Vl and V2 can be connected in the illustrated normal electrical system, while the consumer V3 is a durable consumer to be supplied. Additional consumers can be connected in a similar way as the consumers V1 and V2.
Die sicherheitsrelevanten Verbraucher, insbesondere ein so genanntes X-by-Wire-System sind mit 6 bezeichnet. Dieses System ist in zwei Kreise Kl und K2 aufgeteilt. Jeder dieser Kreise wird separat mit elektrischer Energie versorgt.The safety-relevant consumers, in particular a so-called X-by-wire system are designated by 6. This system is divided into two circles K1 and K2. Each of these circuits is supplied separately with electrical energy.
Die Versorgung der sicherheitsrelevanten Verbraucher bzw. des X-by-Wire-Systems 6 erfolgt über zwei getrennte Energiepfade, die prinzipiell gleich aufgebaut sind. Jeder Pfad besteht aus einem Spannungswandler (DC/DC- Wandler) 2 bzw. 3 und einem Ladungsspeicher bzw. einer Batterie 4 bzw. 5. Der Anschluss der beiden getrennten Energiepfade erfolgt dabei so, dass der Pfad mit dem Spannungswandler 2 und der Batterie 4 zwischen dem Speicher SP und dem Starter S angeschlossen wird und der Energiepfad mit dem Spannungswandler 3 zwischen dem Generator G und dem Speicher SP angeschlossen wird.The supply of the safety-relevant consumer or the X-by-wire system 6 via two separate energy paths, which are basically the same structure. Each path consists of a voltage converter (DC / DC converter) 2 or 3 and a charge storage or a battery 4 or 5. The connection of the two separate energy paths is carried out so that the path with the voltage converter 2 and the battery is connected between the memory SP and the starter S and the energy path is connected to the voltage converter 3 between the generator G and the memory SP.
Durch die in der Figur dargestellte Bordnetzschaltung kann das System mit den sicherheitsrelevanten Verbrauchern völlig unabhängig vom Bordnetz konzipiert werden. Änderungen im Bordnetz haben wiederum keine Auswirkung auf das System mit den sicherheitsrelevanten Verbrauchern. Durch die vollständige Redundanz der Spannungsversorgung für die Kreise Kl und K2 lässt sich als X-by-Wire-System auch ein elektrisches Bremssystem realisieren, wobei dies vorzugsweise ein zweikreisiges elektrisches oder e- lektromechanisches Bremssystem ist.The on-board power supply circuit shown in the figure, the system can be designed with the safety-relevant consumers completely independent of the electrical system. In turn, changes in the electrical system have no effect on the system with the safety-relevant consumers. Due to the complete redundancy of the voltage supply for circuits K1 and K2, an electrical braking system can also be realized as an X-by-wire system, this preferably being a double-circuited electrical or electromechanical brake system.
Durch entsprechende Ansteuerung der Spannungswandler 2 bzw. 3, die bspw. mit Hilfe zugeführter Ansteuersignale SIG 2 und SIG 3 erfolgt, kann von einem nicht näher dargestellten externen Steuergerät 10, beispielsweise einem Bordnetzsteuergerät eine Ansteuerung der Spannungswandler 2 bzw. 3 so erfolgen, dass entweder die Batterie 4 oder die Batterie 5 oder beide bevorzugt geladen werden. Dadurch wird die batterieseitige Ausgangsspannung der Spannungswandler entsprechend festgelegt und insbesondere gegenüber der Bordnetzspannung erhöht. Auswirkungen durch unterschiedliche Spannungsni- veaus am Speicher SP bzw. an den Batterien 4 oder 5 können mit Hilfe der beiden Spannungswandler 2 bzw. 3 verändert werden. Insbesondere wird mit Hilfe der beiden Spannungswandler 2 bzw. 3 eine beispielsweise an auftretende Bedingungen angepasste Ausgangsspannung erzeugt. Dabei wird auch berücksichtigt, dass Überspannungen, die im Basis-Bordnetz auftreten können, durch die Gleichspannungswandler vermindert werden müssen, um eine Batterieschädigung durch Überladen im X-by-Wire-Bordnetz zu verhindern. Als Batterie 4 bzw. 5 sowie als Speicher SP können bspw. Blei-Säure-Batterien eingesetzt werden, wobei auch andere Ladungsspeicher denkbar sind. Die Batterien 4 und 5 können, müssen aber nicht gleichartig sein. Den Batterien oder wenigstens einer der Batterien können Mittel zur Ladezustandserkennung zugeordnet sein, deren Informationen bei der Ansteuerung der Gleichspannungswandler berücksichtigt werden kann.By appropriate control of the voltage transformers 2 and 3, which takes place, for example, with the aid of supplied control signals SIG 2 and SIG 3, can be carried out by an external control unit 10, not shown, for example, a vehicle electrical system control unit, the voltage converter 2 or 3 so that either the battery 4 or the battery 5 or both are preferably charged. As a result, the battery-side output voltage of the voltage converter is determined accordingly and increased in particular with respect to the vehicle electrical system voltage. Effects due to different voltage levels veaus on the memory SP or on the batteries 4 or 5 can be changed using the two voltage transformers 2 and 3 respectively. In particular, with the aid of the two voltage transformers 2 and 3, an output voltage adapted, for example, to occurring conditions is generated. It is also taken into account that overvoltages which can occur in the basic on-board electrical system must be reduced by the DC-DC converters in order to prevent battery damage by overcharging in the X-by-wire electrical system. For example, lead-acid batteries can be used as the battery 4 or 5 and as the memory SP, although other charge storage devices are also conceivable. The batteries 4 and 5 may, but need not be alike. The batteries or at least one of the batteries can be assigned means for state of charge detection, whose information can be taken into account in the control of the DC-DC converter.
Die erfindungsgemäße Vorrichtung zur Spannungsversorgung für sicherheitsrelevante Verbraucher mit einem ersten Teilbordnetz, das den Generator, einen Speicher, einen Starter sowie die herkömmlichen Verbraucher umfasst und wenigstens zwei sicherheitsrelevanten Verbrauchern, die mit wenigstens zwei Ladungsspeichern insbesondere Batterien in Verbindung stehen, ist wie vorstehend beschrieben, also dadurch gekennzeichnet, dass die sicherheitsrelevanten Verbraucher in zwei Kreise Kl und K2 unterteilt sind und jeder dieser Kreise Kl und K2 ist mit einem eigenen Ladungsspeicher, insbesondere einer Batterie 4, 5 verbunden und jeder dieser Ladungsspeicher 4, 5 steht über einen Spannungswandler 2, 3 mit dem üblichen Bordnetz 1 in Verbindung. The device according to the invention for supplying power to safety-relevant consumers with a first sub-electrical system comprising the generator, a memory, a starter and the conventional consumer and at least two safety-relevant consumers, which are in communication with at least two charge stores, in particular batteries, as described above, ie characterized in that the safety-relevant consumers are divided into two circuits K1 and K2 and each of these circuits K1 and K2 is connected to its own charge storage, in particular a battery 4, 5 and each of these charge storage 4, 5 is connected via a voltage converter 2, 3 with the usual electrical system 1 in conjunction.

Claims

Ansprüche claims
1. Vorrichtung zur Spannungsversorgung für sicherheitsrelevante Verbraucher mit einem ersten Teilbordnetz, das den Generator, einen Speicher, gegebenenfalls einen Starter sowie die herkömmlichen Verbraucher umfasst und wenigstens zwei sicherheitsrelevanten Verbrauchern, die mit wenigstens zwei Ladungsspeichern insbesondere Batterien in Verbindung stehen, dadurch gekennzeichnet, dass die sicherheitsrelevanten Verbraucher in zwei Kreise (Kl, K2) unterteilt sind, dass jeder dieser Kreise (Kl, K2) mit einem eigenen Ladungsspeicher, insbesondere einer Batterie (4, 5) verbunden ist und jeder dieser Ladungsspeicher (4, 5) über einen Spannungswandler (2, 3) mit dem üblichen Bordnetz (1) in Verbindung steht.1. A device for power supply for safety-relevant consumers with a first sub-electrical system comprising the generator, a memory, optionally a starter and the conventional consumer and at least two safety-relevant consumers, which are in communication with at least two charge stores, in particular batteries, characterized in that safety-relevant consumers are divided into two circuits (K1, K2), that each of these circuits (K1, K2) is connected to its own charge storage device, in particular a battery (4, 5), and each of these charge storage devices (4, 5) is connected via a voltage converter ( 2, 3) with the usual electrical system (1) is in communication.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Gleichspannungswandler (2) zwischen dem Ladungsspeicher (SP) und dem Starter (S) und der Spannungswandler (3) zwischen dem Generator (G) und dem Ladungspeicher (SP) angeschlossen ist.2. Apparatus according to claim 1, characterized in that the DC-DC converter (2) between the charge storage (SP) and the starter (S) and the voltage converter (3) between the generator (G) and the charge storage (SP) is connected.
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Kreise (Kl) und (K2) X-by-Wire-Systeme umfassen.3. Device according to claim 1 or 2, characterized in that the circles (Kl) and (K2) comprise X-by-wire systems.
4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die X-by-Wire- Systeme zwei Bremskreise einer zweikreisigen elektrischen oder elektromechani- schen Bremse sind. 4. Apparatus according to claim 3, characterized in that the x-by-wire systems are two brake circuits of a dual-circuit electric or electromechanical brake.
5. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass wenigstens einer der Spannungswandler (2, 3) so steuerbar ist, dass er batterie- seitig eine angepasste, vorzugsweise an vorliegende Bedingungen angepasste Ausgangsspannung liefert.5. Device according to one of the preceding claims, characterized in that at least one of the voltage transformers (2, 3) is controllable so that it supplies a battery-side adapted, preferably adapted to present conditions output voltage.
6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Steuerung der Gleichspannungswandler mittel Ansteuersignalen erfolgt, die von einem Steuergerät (10), vorzugsweise einem Bordnetzsteuergerät geliefert werden.6. The device according to claim 5, characterized in that the control of the DC-DC converter by means of drive signals, which are supplied by a control unit (10), preferably a vehicle electrical system control unit.
7. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Batterien (4, 5) gleichartige Batterien sind, insbesondere Blei-Säure- Batterien und der Speicher (SP) eine Blei-Säure-Batterie oder Supercap ist.7. Device according to one of the preceding claims, characterized in that the batteries (4, 5) are similar batteries, in particular lead-acid batteries and the memory (SP) is a lead-acid battery or supercap.
8. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Batterien (4, 5) unterschiedliche Batterien sind und der Speicher (SP) eine Blei-Säure-Batterie oder Supercap ist.8. Device according to one of the preceding claims, characterized in that the batteries (4, 5) are different batteries and the memory (SP) is a lead-acid battery or supercap.
9. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass wenigstens ein Inselbordnetz vorhanden ist. 9. Device according to one of the preceding claims, characterized in that at least one on-board electrical system is present.
EP06700705A 2005-01-31 2006-01-12 Voltage supply device for safety-relevant consumers Withdrawn EP1846268A1 (en)

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DE102005004328A DE102005004328A1 (en) 2005-01-31 2005-01-31 Device for supplying power to safety-relevant consumers
PCT/EP2006/050191 WO2006082124A1 (en) 2005-01-31 2006-01-12 Voltage supply device for safety-relevant consumers

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