DE102005004174A1 - Motor vehicle battery diagnosis method, involves characterizing motor vehicle battery as defective, if amplitude of battery power e.g. charging power or discharging power, falls below given power threshold value - Google Patents

Motor vehicle battery diagnosis method, involves characterizing motor vehicle battery as defective, if amplitude of battery power e.g. charging power or discharging power, falls below given power threshold value Download PDF

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DE102005004174A1
DE102005004174A1 DE102005004174A DE102005004174A DE102005004174A1 DE 102005004174 A1 DE102005004174 A1 DE 102005004174A1 DE 102005004174 A DE102005004174 A DE 102005004174A DE 102005004174 A DE102005004174 A DE 102005004174A DE 102005004174 A1 DE102005004174 A1 DE 102005004174A1
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current
battery
motor vehicle
power
vehicle battery
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DE102005004174B4 (en
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Norbert Wolf
Marcus Krauss
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Audi AG
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Audi AG
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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • 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
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • 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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/005—Testing of electric installations on transport means
    • G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/54—Testing for continuity
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Secondary Cells (AREA)

Abstract

The method involves increasing or decreasing a reference voltage (UG) of a generator (2) during dropping of a power threshold value. Battery power (IB) is measured again as a charging power or a discharging power of a motor vehicle battery (3). The motor vehicle battery is characterized as defective if the amplitude of the battery power e.g. charging power or the discharging power, falls below a given power threshold value.

Description

Die Erfindung betrifft ein Verfahren zur Diagnose einer Kraftfahrzeugbatterie gemäß dem Oberbegriff des Patentanspruchs 1.The The invention relates to a method for diagnosing a motor vehicle battery according to the generic term of claim 1

Kraftfahrzeuge besitzen einen Generator, der den für den Fahrbetrieb des Kraftfahrzeugs benötigten Strom erzeugt, wobei die elektrische Energie zur Pufferung von Überlastphasen in der Kraftfahrzeugbatterie gespeichert wird. Bei einem Defekt der Kraftfahrzeugbatterie, bsp. in den Batteriezuleitungen, den Batteriezellenverbindungen oder den Batteriepolen, können bestimmte Systeme des Kraftfahrzeugs oftmals nur in einem eingeschränkten Funktionsumfang betrieben werden oder sogar vollständig ausfallen. Problematisch hierbei ist, dass die hierdurch bedingte Störung weder vom Generator noch von einem anderen Steuergerät des Kraftfahrzeugs erkannt wird und deshalb auch dem Bediener des Kraftfahrzeugs nicht mitgeteilt wird (d.h. die Warnlampe für die Ladekontrolle leuchtet nicht auf). Die Störung wird daher üblicherweise erst dann bemerkt, wenn das Kraftfahrzeug nicht mehr startfähig ist.motor vehicles own a generator, which is responsible for the driving of the motor vehicle required Electricity generated, with the electrical energy used to buffer overcurrent phases is stored in the motor vehicle battery. In case of a defect the motor vehicle battery, bsp. in the battery leads, the Battery cell connections or the battery poles, certain Systems of the motor vehicle often only in a limited range of functions be operated or even fail completely. Problematic In this case, the resulting disturbance is neither from the generator nor from another controller of the motor vehicle is detected and therefore also the operator of the motor vehicle is not communicated (i.e., the charge control warning light is on not open). The disorder therefore becomes common only then noticed when the vehicle is no longer bootable.

Aus der DE 103 09 913 B3 ist ein Verfahren zum Erkennen einer defekten Kraftfahrzeugbatterie bekannt, bei dem ein Defekt der Kraftfahrzeugbatterie dann festgestellt wird, wenn die Welligkeit der Batteriespannung einen vorgegebenen Welligkeitsschwellwert überschreitet und gleichzeitig der Batteriestrom einen vorgegebenen Stromschwellwert unterschreitet.From the DE 103 09 913 B3 a method for detecting a defective motor vehicle battery is known in which a defect of the motor vehicle battery is detected when the ripple of the battery voltage exceeds a predetermined ripple threshold and at the same time the battery current falls below a predetermined current threshold.

Aus der nicht vorveröffentlichten DE 2004 004 172 ist ebenfalls ein Verfahren zum Erkennen einer defekten Kraftfahrzeugbatterie bekannt, bei dem zur sicheren Erkennung eines Fehlers der Kraftfahrzeugbatterie so wohl der Batteriestrom als auch beim Unterschreiten eines Stromschwellwerts wenigstens eine zweite elektrische Größe überwacht werden, insbesondere die Welligkeit der Batteriespannung oder des Batteriestroms.From the not pre-published DE 2004 004 172 A method for detecting a faulty motor vehicle battery is also known, in which, for reliable detection of a fault in the motor vehicle battery, the battery current as well as below a current threshold value at least a second electrical variable are monitored, in particular the ripple of the battery voltage or the battery current.

Zur Realisierung der sicheren Erkennung einer defekten Batterie werden bei den bekannten Verfahren somit mindestens zwei Sensoren benötigt, was jedoch mit entsprechenden Kosten und erhöhtem Messaufwand verbunden ist.to Realization of the safe detection of a defective battery in the known method thus requires at least two sensors, which However, associated with corresponding costs and increased measurement costs is.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Diagnose einer Kraftfahrzeugbatterie anzugeben, mit dem eine defekte Kraftfahrzeugbatterie auf einfache Weise, kostengünstig und zuverlässig erkannt werden kann.Of the Invention is based on the object, a method for diagnosis to specify a motor vehicle battery, with a defective motor vehicle battery in a simple way, cost-effective and reliable can be recognized.

Diese Aufgabe wird erfindungsgemäß durch das Kennzeichen des Patentanspruchs 1 gelöst.These The object is achieved by the Characteristics of claim 1 solved.

Vorteilhafte Ausgestaltungen der Erfindung sind Bestandteil der weiteren Patentansprüche.advantageous Embodiments of the invention are part of the further claims.

Erfindungsgemäß wird beim vorgestellten Verfahren unter Verwendung eines Stromsensors als einzigem Sensor und daher mit geringem Messaufwand und kostengünstig der Batteriestrom als der in die Kraftfahrzeugbatterie fließende Ladestrom oder der aus der Kraftfahrzeugbatterie fließende Entladestrom gemessen; falls die Amplitude des Batteriestroms als Ladestrom oder Entladestrom einen Stromschwellwert unterschreitet (ein Stromfluss, der unterhalb diesem Stromschwellwert liegt, kann auf eine defekte Batterie hindeuten), wird (um eine Fehldiagnose auszuschließen) die Generatorspannung reduziert oder erhöht und durch erneute Messung des Batteriestroms als in die Kraftfahrzeugbatterie fließenden Ladestroms oder aus der Kraftfahrzeugbatterie fließenden Entladestroms überprüft, ob die Amplitude des Batteriestroms als Ladestrom oder Entladestrom hierdurch ansteigt, d.h. wieder den Stromschwellwert überschreitet. Bleibt die Amplitude des Batteriestroms als Ladestrom oder Entladestrom jedoch hierdurch weiterhin unterhalb des Stromschwellwerts, wird die Kraftfahrzeugbatterie als defekt charakterisiert.According to the invention presented method using a current sensor as the only Sensor and therefore with little effort and cost of the Battery current as the charging current flowing in the motor vehicle battery or the discharge current flowing from the motor vehicle battery is measured; if the amplitude of the battery current as charging current or discharge current falls below a current threshold (a current flow below this current threshold is, may indicate a defective battery), is (to exclude a misdiagnosis) reduces the generator voltage or increased and by re-measuring the battery current as charging current flowing into the vehicle battery or discharging current flowing from the motor vehicle battery checks whether the amplitude of the battery current as charge current or discharge current thereby increases, i.e. again exceeds the current threshold. Remains the amplitude of the Battery currents as charging current or discharge current, however, thereby continues below the current threshold, the motor vehicle battery characterized as defective.

Der Stromschwellwert wird hierbei so gewählt, dass äußere Einflüsse wie bsp. Motordrehzahl oder elektrische Verbraucher des Kraftfahrzeugs keinen Einfluss auf die Diagnose haben. Gleichzeitig wird der Stromschwellwert so gewählt, dass Fehldiagnosen bsp. aufgrund von Messungenauigkeiten ausgeschlossen werden können. Zur Erhöhung der Robustheit des Diagnoseverfahrens können mehrere aufeinanderfolgende Messwerte des Batteriestroms zur Diagnose der Kraftfahrzeugbatterie herangezogen werden, wobei die Messwerte des Batteriestroms jeweils den Stromschwellwert unterschreiten müssen, um die Kraftfahrzeugbatterie als defekt zu charakterisieren.Of the Current threshold is chosen so that external influences such as. Engine speed or electrical consumers of the motor vehicle do not affect the Have a diagnosis. At the same time, the current threshold is selected so that Misdiagnosis bsp. excluded due to measurement inaccuracies can be. To increase The robustness of the diagnostic procedure can be several consecutive Measured values of the battery current for the diagnosis of the motor vehicle battery are used, the measured values of the battery current respectively must fall below the current threshold, the motor vehicle battery to characterize as defective.

Vorzugsweise beträgt der Stromschwellwert weniger als 10% des minimalen Ladestroms oder Entladestroms im Normalbetrieb von bsp. 2 A bis 7 A. Der Stromschwellwert kann auch als Absolutwert vorgegeben werden, wobei der Stromschwellwert insbesondere im mA-Bereich liegt, bsp. wird ein Stromschwellwert von 100 mA vorgegeben.Preferably is the current threshold is less than 10% of the minimum charging current or discharge current in normal operation of bsp. 2 A to 7 A. The current threshold can also be given as an absolute value, wherein the current threshold especially in the mA range, bsp. becomes a current threshold specified by 100 mA.

Der Ladestromfluss oder der Entladestromfluss aus der Batterie kann mittels eines Hallsensors oder Messshunts oder Amperemeters als Stromsensor gemessen oder mittels weiterer Messverfahren erfasst werden.Of the Charging current flow or the discharge current flow from the battery can by means of a Hall sensor or measuring shunt or ammeter as Current sensor measured or detected by other measurement methods become.

Im Zusammenhang mit der Zeichnung soll ein Ausführungsbeispiel der Erfindung erläutert werden.in the In connection with the drawing, an embodiment of the invention explained become.

Hierbei zeigen:in this connection demonstrate:

1 eine schematische Darstellung eines Teils des Bordnetzes des Kraftfahrzeugs mit einem Generator und einer Kraftfahrzeugbatterie, 1 a schematic representation of part of the electrical system of the motor vehicle with a generator and a motor vehicle battery,

2 den zeitlichen Verlauf des Betrags des Batteriestroms als Ladestroms bzw. Entladestroms aus der vom Generator gespeisten Batterie des Kraftfahrzeugs. 2 the time course of the amount of the battery current as a charging current or discharge current from the battery powered by the generator of the motor vehicle.

In der 1 sind schematisch einige Komponenten des Bordnetzes 1 des Kraftfahrzeugs dargestellt, insbesondere der vom Motor des Kraftfahrzeugs angetriebene und für die elektrischen Verbraucher 6 des Kraftfahrzeugs elektrische Energie erzeugende Generator 2 und die über die Anschlussleitung 4 als Ladeleitung mit dem Generator 2 verbundene Kraftfahrzeugbatterie 3 zur Speicherung der vom Generator 2 erzeugten elektrischen Energie. Bsp. liefert der Generator 2 als Drehstromgenerator einen Strom von 140 A und eine Generatorspannung UG bzw. Sollspannung von 14.3 V. Der Batteriestrom IB als Ladestrom oder Entladestrom der Kraftfahrzeugbatterie 3 kann mit einem Stromsensor 5 erfasst werden, bsp. mit einem in Reihe zur Kraftfahrzeugbatterie 3 geschalteten Amperemeter als Stromsensor 5.In the 1 are schematic some components of the electrical system 1 represented of the motor vehicle, in particular driven by the engine of the motor vehicle and for the electrical consumers 6 of the motor vehicle electrical energy generating generator 2 and the over the connecting line 4 as charging line with the generator 2 connected vehicle battery 3 for storing the generator 2 generated electrical energy. Eg the generator delivers 2 as a three-phase generator, a current of 140 A and a generator voltage U G or setpoint voltage of 14.3 V. The battery current I B as a charging current or discharge current of the motor vehicle battery 3 can with a current sensor 5 be captured, eg. with one in series to the motor vehicle battery 3 switched ammeter as a current sensor 5 ,

Die 2 zeigt den zeitlichen Verlauf des Betrags des Batteriestroms IB als Ladestrom oder Entladestrom, insbesondere einen Vergleich des Betrags des Batteriestroms IB bei intakter Kraftfahrzeugbatterie 3 als Stromwert IN und bei defekter Kraftfahrzeugbatterie 3 als Stromwert ID. Dieser Defekt in der Kraftfahrzeugbatterie 3 kann bsp. aufgrund eines losen Zellverbinders der Batteriezellen oder aufgrund eines Wackelkontakts an einer Anschlussstelle oder einer Anschlussleitung 4 (bsp. der Ladeleitung) oder aufgrund eines Kabelbruchs einer Anschlussleitung 4 (bsp. der Ladeleitung) verursacht werden.The 2 shows the time course of the amount of the battery current I B as a charging current or discharge current, in particular a comparison of the amount of the battery current I B with intact motor vehicle battery 3 as current value I N and in case of defective motor vehicle battery 3 as current value I D. This defect in the motor vehicle battery 3 can bsp. due to a loose cell connector of the battery cells or due to a loose contact at a junction or a connecting lead 4 (eg the charging cable) or due to a cable break of a connecting cable 4 (eg the charging line) are caused.

Bei einer intakten Kraftfahrzeugbatterie 3 (Zeitraum Δt1 bis zum Zeitpunkt t1) hat der Batteriestrom IB den vom Ladezustand der Kraftfahrzeugbatterie 3 und der Anzahl der eingeschalteten Verbraucher 6 des Kraftfahrzeugs abhängigen Stromwert IN; bsp. beträgt der Stromwert IN des Batteriestroms IB ungefähr 0.5 A bis 1 A. Die Amplitude des Batteriestroms IB ist während des Zeitraums Δt1 näherungsweise konstant, abgesehen von einer vergleichsweise geringen überlagerten Sinusschwingung, die durch den Drehstrom liefernden Generator 2 verursacht wird. Beim Auftreten des Defekts in der Kraftfahrzeugbatterie 3 zum Zeitpunkt t1 geht die Amplitude des Batteriestroms IB vom Stromwert IN annähernd auf den Stromwert ID = 0 zurück (ID ≈ 0) und verbleibt auch während des Zeitraums Δt2 auf diesem Stromwert ID, da der Kraftfahrzeugbatterie 3 nunmehr aufgrund des sehr hohen Innenwiderstands der defekten Kraftfahrzeugbatterie 3 keine weitere Energie zugeführt werden kann.In an intact motor vehicle battery 3 (Period .DELTA.t 1 to time t 1 ), the battery current I B has the state of charge of the motor vehicle battery 3 and the number of consumers switched on 6 the motor vehicle dependent current value I N ; bsp. For example, the current value I N of the battery current I B is approximately 0.5 A to 1 A. The amplitude of the battery current I B is approximately constant during the period Δt 1 , except for a comparatively small superimposed sinusoidal wave generated by the three-phase generator 2 is caused. Upon the occurrence of the defect in the motor vehicle battery 3 at time t 1, the amplitude 0 is the battery current I B from the current value I N approximately to the current value I D = back (I D ≈ 0) and remains during the period .DELTA.t 2 on this current value I D, since the motor vehicle battery 3 now due to the very high internal resistance of the defective motor vehicle battery 3 no further energy can be supplied.

Der Batteriestrom IB (die Amplitude des Batteriestroms IB) wird als Ladestrom oder Entladestrom bsp. mit einem Amperemeter als Stromsensor 5 gemessen; um Störeinflüsse auf den gemessenen Batteriestrom IB zu vermeiden, kann dieser bsp. über ein Tiefpassfilter gemittelt werden. Der als Ladestrom oder Entladestrom gemessene Batteriestrom IB wird mit dem Stromschwellwert IS verglichen (bsp. beträgt der Stromschwellwert IS 100 mA): falls der Batteriestrom IB kleiner als der Stromschwellwert IS von bsp. 100 mA ist, das heißt beim Unterschreiten des Stromschwellwerts IS, wird die Generatorspannung UG des Generators 2 (dessen Sollspannung) abgesenkt bzw. angehoben, bsp. von 14.3 V auf 13.8 V bzw. von 14.3 V auf 14.8 V und der Batteriestrom IB erneut gemessen. Liegt dieser Batteriestrom IB weiterhin unterhalb des Stromschwellwerts IS (wie bsp. ab dem Zeitpunkt t1 während des Zeitraums Δt2), wird die Kraftfahrzeugbatterie 3 als defekt charakterisiert. In diesem Falle wird ein Fehlersignal an ein Fahrzeugdiagnosesystem oder bsp. optisch oder akustisch direkt an den Bediener des Kraftfahrzeugs ausgegeben. Zur Erhöhung der Robustheit des Diagnoseverfahrens können mehrere aufeinanderfolgende Messwerte des Batteriestroms IB zur Charakterisierung die Kraftfahrzeugbatterie 3 herangezogen werden.The battery current I B (the amplitude of the battery current I B ) is as charging current or discharge current bsp. with an ammeter as a current sensor 5 measured; To avoid interference with the measured battery current I B , this bsp. be averaged over a low pass filter. The measured as a charging current or discharging battery current I B is compared with the current threshold value I S (bsp is the current threshold value I S 100 mA.): If the battery current I B is less than the current threshold value I S of Ex. 100 mA, that is, when falling below the current threshold I S , the generator voltage U G of the generator 2 (whose target voltage) lowered or raised, ex. from 14.3 V to 13.8 V or from 14.3 V to 14.8 V and the battery current I B measured again. If this battery current I B continues to below the current threshold value I S (as Ex. 1 from the time t during the period .DELTA.t 2), the motor vehicle battery is 3 characterized as defective. In this case, an error signal to a vehicle diagnostic system or bsp. optically or acoustically output directly to the operator of the motor vehicle. To increase the robustness of the diagnostic method, a plurality of successive measured values of the battery current I B for characterizing the motor vehicle battery 3 be used.

Zur Durchführung des Verfahrens kann ein Steuergerät des Kraftfahrzeugs verwendet werden. Dabei kann hierzu ein bereits im Kraftfahrzeug vorhandenes Steuergerät vorgesehen werden, bsp. das Steuergerät für das Batterieenergiemanagement oder das für die Überwachung des Bordnetzes des Kraftfahrzeugs vorgesehene Steuergerät oder aber ein spezielles, für das beschriebene Verfahren entwickelte Steuergerät.to execution of the method can be used a control unit of the motor vehicle become. For this purpose, an already existing in the motor vehicle control unit be provided, eg. the control unit for battery energy management or that for The supervision the on-board network of the motor vehicle provided control unit or a special, for the described method developed control unit.

Claims (5)

Verfahren zur Diagnose einer Kraftfahrzeugbatterie (3), die von einem Generator (2) des Kraftfahrzeugs gespeist wird, dadurch gekennzeichnet, dass der Batteriestrom (IB) als Ladestrom oder Entladestrom der Kraftfahrzeugbatterie (3) gemessen und dessen Amplitude mit einem Stromschwellwert (IS) verglichen wird, dass beim Unterschreiten des Stromschwellwerts (IS) die Sollspannung (UG) des Generators (2) reduziert oder erhöht wird und der Batteriestrom (IB) als Ladestrom oder Entladestrom der Kraftfahrzeugbatterie (3) erneut gemessen wird, und dass die Kraftfahrzeugbatterie (3) als defekt charakterisiert wird, wenn die Amplitude des Batteriestroms (IB) als Ladestrom oder Entladestrom den vorgegebenen Stromschwellwert (IS) weiterhin unterschreitet.Method for diagnosing a motor vehicle battery ( 3 ) generated by a generator ( 2 ) of the motor vehicle, characterized in that the battery current (I B ) as charging current or discharge current of the motor vehicle battery ( 3 Is) the amplitude of which is measured and compared with a current threshold value (I S), that when falling below the current threshold (I S), the target voltage (U G) of the generator ( 2 ) is reduced or increased and the battery current (I B ) as a charging current or discharge current of the motor vehicle battery ( 3 ) is measured again, and that the motor vehicle battery ( 3 ) is characterized as defective if the amplitude of the battery current (I B ) as charge current or discharge current continues to fall below the predetermined current threshold value (I S ). Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Stromschwellwert (IS) zu 100 mA vorgegeben wird.A method according to claim 1, characterized in that the current threshold (I S ) is set to 100 mA. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass mehrere aufeinanderfolgende Messwerte des Batteriestroms (IB) als Ladestroms oder Entladestroms zur Diagnose der Kraftfahrzeugbatterie (3) herangezogen werden.A method according to claim 1 or 2, characterized in that a plurality of successive measured values of the battery current (I B ) as charging current or discharge current for diagnosis of the motor vehicle battery ( 3 ) are used. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Batteriestrom (IB) als Ladestrom oder Entladestrom mittels eines Stromsensors (5) gemessen wird.Method according to one of claims 1 to 3, characterized in that the battery current (I B ) as charging current or discharge current by means of a current sensor ( 5 ) is measured. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass der Batteriestrom (IB) als Ladestrom oder Entladestrom mittels eines Amperemeters oder eines Hallsensors oder eines Messshunts gemessen wird.A method according to claim 4, characterized in that the battery current (I B ) is measured as charging current or discharge current by means of an ammeter or a Hall sensor or a measuring shunt.
DE102005004174A 2005-01-29 2005-01-29 Method for diagnosing a motor vehicle battery Expired - Fee Related DE102005004174B4 (en)

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* Cited by examiner, † Cited by third party
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FR2960298A1 (en) * 2010-05-18 2011-11-25 Valeo Equip Electr Moteur Method for detecting connection defect of battery sensor in vehicle, involves comparing current information with current thresholds, and delivering alert information when current information is lower than current thresholds, respectively
FR2963678A1 (en) * 2010-08-05 2012-02-10 Peugeot Citroen Automobiles Sa Battery's disconnection detection device for power supply network of motor vehicle, has control unit generating alarm signal in case of continuity of reception of alert signal after initiation of operation variation of electric body
FR2967784A1 (en) * 2010-11-23 2012-05-25 Peugeot Citroen Automobiles Sa Method for detecting disconnection of battery assembled on electric feeder system of motor vehicle, involves transmitting alarm signal when evolution of engine speed is not detected at detection stage
WO2019112505A1 (en) 2017-12-04 2019-06-13 Scania Cv Ab A device for a motor vehicle electric system and a method for controlling such an electric system
DE102018007713A1 (en) * 2018-09-29 2020-04-02 Psa Automobiles Sa Method for operating a motor vehicle electrical system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19952693A1 (en) * 1999-10-14 2001-05-23 Akkumulatorenfabrik Moll Gmbh Measurement, determination and display of condition of an automotive starter battery using one or more sensor for measuring charge, temperature, voltage, etc. to provided detailed information about current and future state, etc.
DE10309913B3 (en) * 2003-03-07 2004-08-19 Audi Ag Defective automobile battery identification method using simultaneous evaluation of detected oscillatory variation in battery voltage and battery current

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004004172A1 (en) * 2004-01-28 2005-08-18 Robert Bosch Gmbh Determination of a defective automobile electrical battery based upon measurement of battery current

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19952693A1 (en) * 1999-10-14 2001-05-23 Akkumulatorenfabrik Moll Gmbh Measurement, determination and display of condition of an automotive starter battery using one or more sensor for measuring charge, temperature, voltage, etc. to provided detailed information about current and future state, etc.
DE10309913B3 (en) * 2003-03-07 2004-08-19 Audi Ag Defective automobile battery identification method using simultaneous evaluation of detected oscillatory variation in battery voltage and battery current

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2960298A1 (en) * 2010-05-18 2011-11-25 Valeo Equip Electr Moteur Method for detecting connection defect of battery sensor in vehicle, involves comparing current information with current thresholds, and delivering alert information when current information is lower than current thresholds, respectively
FR2963678A1 (en) * 2010-08-05 2012-02-10 Peugeot Citroen Automobiles Sa Battery's disconnection detection device for power supply network of motor vehicle, has control unit generating alarm signal in case of continuity of reception of alert signal after initiation of operation variation of electric body
FR2967784A1 (en) * 2010-11-23 2012-05-25 Peugeot Citroen Automobiles Sa Method for detecting disconnection of battery assembled on electric feeder system of motor vehicle, involves transmitting alarm signal when evolution of engine speed is not detected at detection stage
WO2019112505A1 (en) 2017-12-04 2019-06-13 Scania Cv Ab A device for a motor vehicle electric system and a method for controlling such an electric system
DE102018007713A1 (en) * 2018-09-29 2020-04-02 Psa Automobiles Sa Method for operating a motor vehicle electrical system
DE102018007713B4 (en) * 2018-09-29 2020-08-13 Psa Automobiles Sa Method for operating a motor vehicle electrical system and a motor vehicle electrical system

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