DE102006048872A1 - On-board electrical system for motor vehicle, has starter battery formed as lead-battery, and supplying battery is formed as lithium-iron-phosphate battery - Google Patents

On-board electrical system for motor vehicle, has starter battery formed as lead-battery, and supplying battery is formed as lithium-iron-phosphate battery Download PDF

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Publication number
DE102006048872A1
DE102006048872A1 DE102006048872A DE102006048872A DE102006048872A1 DE 102006048872 A1 DE102006048872 A1 DE 102006048872A1 DE 102006048872 A DE102006048872 A DE 102006048872A DE 102006048872 A DE102006048872 A DE 102006048872A DE 102006048872 A1 DE102006048872 A1 DE 102006048872A1
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Germany
Prior art keywords
battery
electrical system
motor vehicle
starter
ignition
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Ceased
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DE102006048872A
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German (de)
Inventor
Ulrich Eger
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Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche AG
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Priority to DE102006048872A priority Critical patent/DE102006048872A1/en
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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
    • 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

Abstract

The electrical system (10) has a starter battery (11) and supplying battery (12), where the starter battery is attached to supply network with switch on ignition and the supplying battery is attached to supply network with switch off and switch on ignition. The starter battery is formed as lead-battery and the supplying battery is formed as lithium-iron-phosphate battery.

Description

Die Erfindung betrifft ein Bordnetz eines Kraftfahrzeugs nach dem Oberbegriff des Anspruchs 1.The The invention relates to a vehicle electrical system of a motor vehicle according to the preamble of claim 1.

Ein Bordnetz eines Kraftfahrzeugs dient insbesondere der Bereitstellung einer elektrischen Spannung zum Starten des Kraftfahrzeugs sowie zum Betreiben elektrischer Verbraucher desselben. Um die Startsicherheit eines Kraftfahrzeugs zu erhöhen, sind aus der Praxis bereits Bordnetze mit zwei Batterien bekannt, nämlich mit einer Starterbatterie sowie mit einer Versorgungsbatterie. Die Starterbatterie ist ausschließlich bei eingeschalteter Zündung an das Bordnetz des Kraftfahrzeugs angeschlossen. Die Versorgungsbatterie ist hingegen bei eingeschalteter und ausgeschalteter Zündung an das Bordnetz des Kraftfahrzeugs angeschlossen und dient in erster Linie dem Betreiben elektrischer Verbraucher des Kraftfahrzeugs, wobei einige elektrische Verbraucher, so z. B. ein Diebstahlschutzsystem sowie eine Schließanlage des Kraftfahrzeugs, auch bei ausgeschalteter Zündung elektrische Energie verbrauchen. Da die Starterbatterie bei ausgeschalteter Zündung vom Bordnetz abgekoppelt ist, kann sich dieselbe bei ausgeschalteter Zündung nicht entladen, so dass dann, wenn der Ladezustand der Versorgungsbatterie zum Starten eines Kraftfahrzeugs nicht ausreichend ist, das Kraftfahrzeug sicher über die Starterbatterie gestartet werden kann.One Vehicle electrical system of a motor vehicle is used in particular for the provision an electrical voltage for starting the motor vehicle and the Operate electrical consumers of the same. To the start safety of a motor vehicle, Are already known from practice Bordnetze with two batteries, namely with a starter battery and with a supply battery. The Starter battery is exclusive with the ignition switched on connected to the electrical system of the motor vehicle. The supply battery On the other hand, it is on when the ignition is switched on and off the electrical system of the motor vehicle connected and serves primarily the operation of electrical consumers of the motor vehicle, wherein some electrical consumers, such. B. an anti-theft system as well as a locking system of the motor vehicle, even with the ignition off electrical energy. There the starter battery disconnected from the electrical system with the ignition switched off is the same, it can not discharge when the ignition is off, so that then, when the state of charge of the supply battery for starting a motor vehicle is not sufficient, the motor vehicle safely started over the starter battery can be.

Bei aus der Praxis bekannten Bordnetzen sind die beiden Batterien des Bordnetzes als Blei-Batterien ausgeführt, wodurch sich ein hohes Mehrgewicht ergibt. Dies ist von Nachteil.at From the practice known electrical systems are the two batteries of the Vehicle electrical system designed as lead batteries, resulting in a high added weight results. This is a disadvantage.

Hiervon ausgehend liegt der vorliegenden Erfindung das Problem zu Grunde ein neuartiges Bordnetz eines Kraftfahrzeugs zu schaffen.Of these, Based on the present invention, the problem is based to create a novel wiring system of a motor vehicle.

Dieses Problem wird dadurch ein Bordnetz gemäß Anspruch 1 gelöst. Erfindungsgemäß ist die Versorgungsbatterie als Lithium-Eisen-Phosphat-Batterie ausgebildet.This Problem is solved by a vehicle electrical system according to claim 1. According to the invention, the supply battery formed as a lithium-iron-phosphate battery.

Erfindungsgemäß ist die Starterbatterie als Blei-Batterie und die Versorgungsbatterie als Lithium-Eisen-Phosphat-Batterie ausgeführt. Hierdurch kann Gewicht eingespart werden.According to the invention Starter battery as a lead battery and the supply battery as Lithium iron phosphate battery running. This can weight be saved.

Weiterhin ist das von der Lithium-Eisen-Phosphat-Batterie bereitgestellte Spannungspotential optimal an das von der Starterbatterie bereitgestellte Spannungspotential sowie an die Spannungslage des Kraftfahrzeugs angepasst, so dass auf den Einsatz eines Spannungswandlers zur Anbindung der Versorgungsbatterie an das Bordnetz verzichtet werden kann. Starterbatterie und Versorgungsbatterie können problemlos parallel nebeneinander betrieben werden. Hierdurch ist ein einfacher Aufbau des Bordnetzes gewährleistet.Farther is that provided by the lithium iron phosphate battery Voltage potential optimal to that provided by the starter battery Voltage potential and to the voltage level of the motor vehicle adapted, allowing for the use of a voltage transformer for connection the supply battery can be dispensed with the electrical system. Starter battery and supply battery can easily parallel next to each other operate. This is a simple structure of the electrical system guaranteed.

Vorzugsweise ist zwischen die Starterbatterie und die Versorgungsbatterie ein Relais geschaltet, wobei das Relais unmittelbar von einem Zündschloss des Kraftfahrzeugs ansteuerbar ist.Preferably is between the starter battery and the supply battery Relay switched, the relay directly from an ignition of the motor vehicle is controlled.

Bevorzugte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung. Ein Ausführungsbeispiel der Erfindung wird, ohne hierauf beschränkt zu sein, an Hand der Zeichnung näher erläutert. Dabei zeigt:
ein Blockschaltbild eines erfindungsgemäßen Bordnetzes eines Kraftfahrzeugs.Preferred embodiments of the invention will become apparent from the dependent claims and the description below. An embodiment of the invention will be described, without being limited thereto, with reference to the drawing. Showing:
a block diagram of an electrical system according to the invention of a motor vehicle.

1 zeigt eine schematisierte Darstellung eines erfindungsgemäßen Bordnetzes 10 eines Kraftfahrzeugs, das zwei Batterien umfasst, nämlich eine Starterbatterie 11 sowie eine Versorgungsbatterie 12. Die Starterbatterie 11 sowie die Versorgungsbatterie 12 sind gemäß 1 unmittelbar parallel geschaltet, wobei die Parallelschaltung zwischen der Starterbatterie 11 und der Versorgungsbatterie 12 über einen als Relais 13 ausgeführten Schalter unterbrochen werden kann. 1 shows a schematic representation of a vehicle electrical system according to the invention 10 a motor vehicle comprising two batteries, namely a starter battery 11 and a supply battery 12 , The starter battery 11 as well as the supply battery 12 are according to 1 connected in parallel, the parallel connection between the starter battery 11 and the supply battery 12 via a relay 13 executed switch can be interrupted.

Die Starterbatterie 11 ist ausschließlich bei eingeschalteter Zündung an das Bordnetz des Kraftfahrzeugs angeschlossen, wobei in diesem Fall das Relais 13 geschlossen ist. Bei ausgeschalteter Zündung ist hingegen das Relais 13 geöffnet, so dass die Starterbatterie 11 vom Bordnetz abgekoppelt ist. Die Versorgungsbatterie 12 ist sowohl bei eingeschalteter Zündung als auch bei ausgeschalteter Zündung an das Bordnetz des Kraftfahrzeugs angeschlossen, so dass auch bei ausgeschalteter Zündung elektrische Verbraucher von der Versorgungsbatterie 12 mit elektrischer Spannung bzw. elektrischem Strom versorgt werden können.The starter battery 11 is only connected to the vehicle electrical system with the ignition switched on, in which case the relay 13 closed is. When the ignition is off, however, the relay is 13 open, leaving the starter battery 11 disconnected from the electrical system. The supply battery 12 is connected to the on-board network of the motor vehicle both when the ignition is switched on and when the ignition is switched off, so that even when the ignition is switched off electrical consumers from the supply battery 12 can be supplied with electrical voltage or electric current.

Gemäß 1 ist parallel zu Starterbatterie 11 ein Generator 14 sowie ein Starter 15 geschaltet, wobei der Starter 15 als Motor ausgebildet ist und die von der Starterbatterie 11 bereitgestellte, elektrische Energie nutzt, um den Motor des Kraftfahrzeugs zu starten. Bei gestartetem Verbrennungsmotor dient der Generator 14 der Gewinnung elektrischer Energie, um insbesondere die Starterbatterie 11 sowie die Versorgungsbatterie 12 zu laden.According to 1 is parallel to starter battery 11 a generator 14 as well as a starter 15 switched, the starter 15 is designed as a motor and that of the starter battery 11 provided electrical energy used to start the engine of the motor vehicle. When the internal combustion engine starts, the generator is used 14 the production of electrical energy, in particular the starter battery 11 as well as the supply battery 12 to load.

Im Sinne der hier vorliegenden Erfindung ist die Starterbatterie 11 als Blei-Batterie und die Versorgungsbatterie 12 als Lithium-Eisen-Phosphor-Batterie ausgeführt, nämlich als LiFePo4-Batterie. Die als Blei-Batterie ausgeführte Starterbatterie stellt üblicherweise ein Spannungspotential von in etwa 12 Volt bereit und ist an eine Spannungslage des Kraftfahrzeugs, die üblicherweise bei in etwa 14 Volt liegt, angepasst. Als LiFePo4-Batterie finden vorzugsweise vier in Reihe geschaltete Lithium-Eisen-Phosphat-Zellen Verwendung, wobei jede Zelle ein Spannungspotential von in etwa 3,4 Volt bereitstellt, so dass das von der Versorgungsbatterie 12 bereitgestellte Spannungspotential in etwa 13,6 Volt beträgt. Das von der Versorgungsbatterie 12 bereitgestellte Spannungspotential ist demnach optimal an das Spannungspotential der Starterbatterie 11 sowie an die Spannungslage des Fahrzeugs angepasst, so dass die Starterbatterie 11 sowie die Versorgungsbatterie 12 ohne zwischengeschalteten Spannungswandler parallel zueinander betrieben werden können.For the purposes of the present invention is the starter battery 11 as a lead battery and the supply battery 12 designed as a lithium-iron-phosphorus battery, namely as LiFePo4 battery. The starter battery designed as a lead battery usually provides a voltage potential of about 12 volts and is at a voltage level of the motor vehicle, which is usually at about 14 volts, customized. As the LiFePo4 battery, four series connected lithium iron phosphate cells are preferably used, with each cell providing a voltage potential of about 3.4 volts, that of the supply battery 12 provided voltage potential is approximately 13.6 volts. That from the supply battery 12 provided voltage potential is therefore optimal to the voltage potential of the starter battery 11 as well as adapted to the voltage situation of the vehicle, so that the starter battery 11 as well as the supply battery 12 can be operated parallel to each other without intermediate voltage converter.

Wie bereits ausgeführt, erfolgt die Abkopplung der Starterbatterie vom Bordnetz bei ausgeschalteter Zündung sowie die Ankopplung der Starterbatterie 11 an das Bordnetz bei eingeschalteter Zündung mit Hilfe des Relais 13, wobei das Relais 13 von einem Zündschloss 16 des Kraftfahrzeugs unmittelbar angesteuert werden kann. Hierzu ist das Relais 13 an eine Klemme des Zündschlosses 16 angeschlossen, so dass bei Drehen des Zündschlosses das Relais 13 automatisch bestromt und geschlossen wird. Wird hingegen durch Verdrehen des Zündschlosses die Zündung ausgeschaltet, so wird die Bestromung des Relais 13 aufgehoben, so dass dasselbe automatisch öffnet.As already stated, the decoupling of the starter battery from the electrical system with the ignition off and the coupling of the starter battery 11 to the electrical system with the ignition switched on with the help of the relay 13 , where the relay 13 from an ignition 16 of the motor vehicle can be controlled directly. This is the relay 13 to a terminal of the ignition lock 16 connected so that when turning the ignition, the relay 13 automatically energized and closed. If, however, the ignition is switched off by turning the ignition lock, the current supply to the relay becomes active 13 lifted so that it opens automatically.

Claims (5)

Bordnetz eines Kraftfahrzeugs zur Bereitstellung einer elektrischen Spannung zum Starten des Kraftfahrzeugs sowie zum Betreiben elektrischer Verbraucher des Kraftfahrzeugs bei eingeschalter sowie ausgeschalteter Zündung, mit mindestens zwei Batterien, nämlich mit einer Starterbatterie, die ausschließlich bei eingeschalteter Zündung an das Bordnetz angeschlossen ist, und mit einer Versorgungsbatterie, die sowohl bei eingeschalter als auch bei ausgeschalteter Zündung an das Bordnetz angeschlossen ist, wobei die Starterbatterie als Blei-Batterie ausgebildet ist, dadurch gekennzeichnet, dass die Versorgungsbatterie (12) als Lithium-Eisen-Phosphat-Batterie ausgebildet ist.On-board network of a motor vehicle for providing an electrical voltage for starting the motor vehicle and for operating electrical consumers of the motor vehicle with the ignition switched on and off, with at least two batteries, namely with a starter battery, which is connected only when the ignition is switched on to the electrical system, and with a supply battery , which is connected to the vehicle electrical system both with the ignition switched on and off, the starter battery being designed as a lead battery, characterized in that the supply battery ( 12 ) is formed as a lithium-iron-phosphate battery. Bordnetz nach Anspruch 1, dadurch gekennzeichnet, dass die Starterbatterie (11) und die Versorgungsbatterie (12) bei eingeschalteter Zündung parallel geschaltet sind und bei ausgeschalteter Zündung voneinander getrennt sind.Vehicle electrical system according to claim 1, characterized in that the starter battery ( 11 ) and the supply battery ( 12 ) are connected in parallel with the ignition switched on and are disconnected when the ignition is switched off. Bordnetz nach Anspruch 2, dadurch gekennzeichnet, dass hierzu zwischen die Starterbatterie (11) und die Versorgungsbatterie (12) ein Relais (13) geschaltet ist.Vehicle electrical system according to claim 2, characterized in that for this purpose between the starter battery ( 11 ) and the supply battery ( 12 ) a relay ( 13 ) is switched. Bordnetz nach Anspruch 3, dadurch gekennzeichnet, dass das Relais (13) unmittelbar von einem Zündschloss (16) des Kraftfahrzeugs ansteuerbar ist.Vehicle electrical system according to claim 3, characterized in that the relay ( 13 ) directly from an ignition lock ( 16 ) of the motor vehicle is controllable. Bordnetz nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Versorgungsbatterie (12) von vier in Reihe geschalteten Lithium-Eisen-Phosphat-Zellen, die jeweils ein Spannungspotential von in etwa 3,4 Volt bereitstellen, gebildet ist.Vehicle electrical system according to one or more of claims 1 to 4, characterized in that the supply battery ( 12 ) of four series connected lithium iron phosphate cells, each providing a voltage potential of about 3.4 volts.
DE102006048872A 2006-10-17 2006-10-17 On-board electrical system for motor vehicle, has starter battery formed as lead-battery, and supplying battery is formed as lithium-iron-phosphate battery Ceased DE102006048872A1 (en)

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Cited By (9)

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WO2011029791A1 (en) * 2009-09-08 2011-03-17 Robert Bosch Gmbh Lithium secondary battery system, in particular for use in a standard 14v on-board network
DE102009058362A1 (en) 2009-12-15 2011-06-16 Audi Ag Battery system for motor vehicle, has starter battery supplying current to starter, and main power supply battery supplying current to consumer, where starter battery is decoupled from main power supply during starting process of vehicle
DE102011108231A1 (en) * 2011-04-12 2012-10-18 Audi Ag Energiespeicheranordung
DE102012007324A1 (en) * 2012-04-12 2013-10-17 Audi Ag Energy storage arrangement for onboard network of hybrid motor vehicle, has rechargeable energy storage whose certain minimum amount of electric charge is not less than minimum charging voltage of another rechargeable energy storage
WO2015001222A1 (en) 2013-07-03 2015-01-08 Renault S.A.S. Hybrid starter battery for a motor vehicle
US8957623B2 (en) 2011-03-16 2015-02-17 Johnson Controls Technology Company Systems and methods for controlling multiple storage devices
DE102014219416A1 (en) 2014-09-25 2016-03-31 Bayerische Motoren Werke Aktiengesellschaft An energy storage device for a motor vehicle and method for operating an energy storage device
DE102015115154A1 (en) 2015-09-09 2017-03-09 Claas Tractor Sas Agricultural working machine
CN113669184A (en) * 2021-08-24 2021-11-19 青岛大黄蜂新能源科技有限公司 Starting method and assembly process based on lithium ion battery

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Publication number Priority date Publication date Assignee Title
DE4028242A1 (en) * 1990-09-06 1992-03-12 Bayerische Motoren Werke Ag Dual battery supply system for motor vehicle - separates connection betweenstarter battery and on-board supply battery to prevent chargedrainage
DE60008371T2 (en) * 1999-04-01 2004-12-09 3M Innovative Properties Co., St. Paul Lithium-ion battery with improved self-heating resistance
DE19951128A1 (en) * 1999-10-23 2001-04-26 Bosch Gmbh Robert Method and device for voltage regulation

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011029791A1 (en) * 2009-09-08 2011-03-17 Robert Bosch Gmbh Lithium secondary battery system, in particular for use in a standard 14v on-board network
DE102009058362B4 (en) * 2009-12-15 2017-04-06 Audi Ag Battery system for a motor vehicle, method for operating a battery system of a motor vehicle and motor vehicle
DE102009058362A1 (en) 2009-12-15 2011-06-16 Audi Ag Battery system for motor vehicle, has starter battery supplying current to starter, and main power supply battery supplying current to consumer, where starter battery is decoupled from main power supply during starting process of vehicle
US9819064B2 (en) 2011-03-16 2017-11-14 Johnson Control Technology Company Systems and methods for overcharge protection and charge balance in combined energy source systems
US8957623B2 (en) 2011-03-16 2015-02-17 Johnson Controls Technology Company Systems and methods for controlling multiple storage devices
US9300018B2 (en) 2011-03-16 2016-03-29 Johnson Controls Technology Company Energy source system having multiple energy storage devices
US10290912B2 (en) 2011-03-16 2019-05-14 Johnson Controls Technology Company Energy source devices and systems having a battery and an ultracapacitor
US10158152B2 (en) 2011-03-16 2018-12-18 Johnson Controls Technology Company Energy source system having multiple energy storage devices
US9425492B2 (en) 2011-03-16 2016-08-23 Johnson Controls Technology Company Energy source systems having devices with differential states of charge
US9754732B2 (en) 2011-04-12 2017-09-05 Audi Ag Energy storage arrangement
US9431180B2 (en) 2011-04-12 2016-08-30 Audi Ag Energy storage arrangement
DE102011108231A1 (en) * 2011-04-12 2012-10-18 Audi Ag Energiespeicheranordung
DE102012007324A1 (en) * 2012-04-12 2013-10-17 Audi Ag Energy storage arrangement for onboard network of hybrid motor vehicle, has rechargeable energy storage whose certain minimum amount of electric charge is not less than minimum charging voltage of another rechargeable energy storage
DE102012007324B4 (en) * 2012-04-12 2017-04-13 Audi Ag Energy storage device
WO2015001222A1 (en) 2013-07-03 2015-01-08 Renault S.A.S. Hybrid starter battery for a motor vehicle
WO2016045925A1 (en) * 2014-09-25 2016-03-31 Bayerische Motoren Werke Aktiengesellschaft Energy storage apparatus for a motor vehicle and method for operating an energy storage device
US10250044B2 (en) 2014-09-25 2019-04-02 Bayerische Motoren Werke Aktiengesellschaft Energy storage apparatus for a motor vehicle and method for operating the energy storage apparatus
DE102014219416A1 (en) 2014-09-25 2016-03-31 Bayerische Motoren Werke Aktiengesellschaft An energy storage device for a motor vehicle and method for operating an energy storage device
DE102015115154A1 (en) 2015-09-09 2017-03-09 Claas Tractor Sas Agricultural working machine
CN113669184A (en) * 2021-08-24 2021-11-19 青岛大黄蜂新能源科技有限公司 Starting method and assembly process based on lithium ion battery

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