EP1303765A1 - Unite electronique permettant d'identifier l'etat de charge et/ou l'usure d'une batterie de vehicule a moteur - Google Patents

Unite electronique permettant d'identifier l'etat de charge et/ou l'usure d'une batterie de vehicule a moteur

Info

Publication number
EP1303765A1
EP1303765A1 EP01957974A EP01957974A EP1303765A1 EP 1303765 A1 EP1303765 A1 EP 1303765A1 EP 01957974 A EP01957974 A EP 01957974A EP 01957974 A EP01957974 A EP 01957974A EP 1303765 A1 EP1303765 A1 EP 1303765A1
Authority
EP
European Patent Office
Prior art keywords
wear
battery
motor vehicle
electronic unit
state
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Withdrawn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
EP01957974A
Other languages
German (de)
English (en)
Inventor
Florian Traub
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 EP1303765A1 publication Critical patent/EP1303765A1/fr
Withdrawn legal-status Critical Current

Links

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
    • G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements

Definitions

  • Electronic unit for detecting the state of charge and / or wear of a motor vehicle battery
  • the invention relates to an electronic unit and a method for detecting the state of charge and / or wear of a motor vehicle battery according to the preamble of patent claim 1.
  • the invention is based on the knowledge that the battery voltage or the battery voltage drop during a starting process depends in particular on the drag torque of the internal combustion engine.
  • the drag torque and thus the starter or battery current is subject to influences due to temperature and manufacturing tolerances, but also changes due to wear, equipment options or inadequate maintenance. All of these variables, as has been found empirically, are incorporated into the engine speed in a similar way to the battery current.
  • the battery voltage is evaluated as a function of the engine speed during the starting process with regard to the state of charge and / or the wear of the motor vehicle battery.
  • the engine speed can be transmitted digitally, for example, via a data bus (eg CAN bus), which connects an engine control unit to the electronic unit.
  • the electronic unit can also be part of an internal combustion engine control unit or another control unit, which is in any case the engine speed itself recorded and evaluated.
  • a table, a characteristic curve or a map can be stored in the electronic unit, which assign speed-dependent battery voltage values to a state of charge and / or wear value.
  • the battery temperature can also be taken into account, for example. In any case, however, no current measurement is carried out. Therefore, the current as such need not be measured in this invention. Nevertheless, taking the engine speed into account achieves a high degree of accuracy, since the engine speed, as has been found empirically, behaves sufficiently precisely in proportion to the current consumed by the starter (starter).
  • a preferably variable voltage threshold is specified as a function of the engine speed. Poor state of charge and / or high wear of the motor vehicle battery is recognized if the battery voltage is below this voltage threshold within a predetermined time window, preferably at a defined point in time.
  • the state of charge is also detected by a closed-circuit voltage measurement before a starting process, in order to be able to use the evaluation of this variable to distinguish between a bad state of charge and high wear if the battery voltage is below the predetermined voltage threshold during the starting process.
  • Bad state of charge is recognized if a defined quiescent voltage threshold has been undershot.
  • High wear is recognized if the defined quiescent voltage threshold has been exceeded.
  • the invention a complex and expensive measurement of the battery current or that of the starter during the starting process can be carried out. with the current. Compared to all known methods without battery current measurement, a significantly improved accuracy can be achieved.
  • the method is automatically adapted to different equipment variants of a vehicle which have an effect on the drag torque of the internal combustion engine (automatic transmission, air conditioning, internal combustion engine type).
  • An adaptation method for example as shown in DE 197 50 309, can therefore be dispensed with, since these effects all go into the course of the engine speed.
  • Fig. 1 an inventive specification of a dependent on the engine speed variable voltage threshold for the battery voltage
  • Fig. 1 shows by means of the solid line the empirically determined relationship between the battery voltage U Batt measured at a certain point in time (eg t during many starting processes and the internal combustion engine speed n recorded at the same time for an intact motor vehicle battery. Such a course is shown For example, this is stored as an optimal characteristic curve in the electronic unit for carrying out the method according to the invention. This relationship could also be stored as a characteristic diagram with additional consideration of the battery temperature.
  • speed n dependent voltage threshold S f (n) in the form of a tolerance band. Above the threshold S, the motor vehicle battery can still be described as intact.
  • a speed-dependent battery voltage value U ßatt below the threshold S indicates a poor state of charge or high wear.
  • FIG. 2 shows the time t on the abscissa and the battery voltage U Batt on the ordinate and the engine speed value n * on the other.
  • the engine speed value n * corresponds to the digital and possibly smoothed value of the measured engine speed n transmitted by the data bus.
  • FIG. 2 shows both the profile of the battery voltage U Batt and the profile of the engine speed n in the form of the values n *, in particular during the starting process.
  • the starter is started, at time t 2 the engine speed n or n * begins to rise, detectably starting from zero [1 / min], and at time t 3 , the engine starts running up on its own.
  • the battery voltage U Baft and at the same time the engine speed n or n * are recorded.
  • the time t m can be predetermined by a fixed period after the time t 2 .

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Secondary Cells (AREA)
  • Control Of Charge By Means Of Generators (AREA)
  • Tests Of Electric Status Of Batteries (AREA)

Abstract

Unité électronique permettant d'identifier l'état de charge et/ou l'usure d'une batterie de véhicule à moteur, dotée de moyens permettant de détecter la tension de la batterie. Ladite unité possède en outre des moyens permettant de détecter la vitesse de rotation (N*) du moteur et des moyens permettant d'évaluer la tension (ubatt) de la batterie en fonction de la vitesse de rotation du moteur pendant l'opération de démarrage (E2-T3), en vue d'identifier l'état de charge et/ou l'usure de la batterie.
EP01957974A 2000-07-26 2001-07-17 Unite electronique permettant d'identifier l'etat de charge et/ou l'usure d'une batterie de vehicule a moteur Withdrawn EP1303765A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10036341A DE10036341A1 (de) 2000-07-26 2000-07-26 Elektronische Einheit zur Erkennung des Ladezustands und/oder des Verschleißes einer Kraftfahrzeugbatterie
DE10036341 2000-07-26
PCT/EP2001/008215 WO2002008777A1 (fr) 2000-07-26 2001-07-17 Unite electronique permettant d'identifier l'etat de charge et/ou l'usure d'une batterie de vehicule a moteur

Publications (1)

Publication Number Publication Date
EP1303765A1 true EP1303765A1 (fr) 2003-04-23

Family

ID=7650248

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01957974A Withdrawn EP1303765A1 (fr) 2000-07-26 2001-07-17 Unite electronique permettant d'identifier l'etat de charge et/ou l'usure d'une batterie de vehicule a moteur

Country Status (5)

Country Link
US (1) US6696842B2 (fr)
EP (1) EP1303765A1 (fr)
JP (1) JP4724352B2 (fr)
DE (1) DE10036341A1 (fr)
WO (1) WO2002008777A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10243567B4 (de) * 2002-09-19 2006-09-07 Siemens Ag Verfahren zur Ermittlung der Startfähigkeit eines Antriebssystems
US7239146B2 (en) * 2003-07-11 2007-07-03 Cardiac Pacemakers, Inc. Indicator of remaining energy in storage cell of implantable medical device
JP4258348B2 (ja) * 2003-10-23 2009-04-30 日産自動車株式会社 バッテリの劣化診断装置及び車載電源装置の制御装置
US7194308B2 (en) * 2003-11-12 2007-03-20 Cardiac Pacemakers, Inc. System and method for monitoring or reporting battery status of implantable medical device
US7064525B2 (en) * 2004-02-26 2006-06-20 Delphi Technologies, Inc. Method for improved battery state of charge
FR2881527B1 (fr) * 2005-01-28 2007-03-02 Valeo Equip Electr Moteur Procede d'evaluation du fonctionnement d'une batterie pour vehicule automobile
JP4499810B2 (ja) 2008-05-28 2010-07-07 株式会社日本自動車部品総合研究所 車載バッテリの状態推定装置
DE112011105036T5 (de) * 2011-03-16 2014-01-02 Toyota Jidosha Kabushiki Kaisha Fahrzeug und Verschlechterungsdiagnoseverfahren für eine Energiespeichervorrichtung
WO2016070116A1 (fr) * 2014-10-31 2016-05-06 Auto Meter Products, Inc. Système et procédé de test électrique

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3901680A1 (de) * 1988-09-13 1990-03-22 Duerrwaechter E Dr Doduco Verfahren zur ueberwachung der kaltstartfaehigkeit der starterbatterie eines verbrennungsmotors

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60105978A (ja) * 1983-11-15 1985-06-11 Nissan Motor Co Ltd バツテリ−の異常警報装置
JPS60140163A (ja) * 1983-12-28 1985-07-25 Nissan Motor Co Ltd バツテリ−の異常予報装置
JP3057703B2 (ja) * 1990-02-22 2000-07-04 株式会社デンソー バッテリの始動能力検出装置
SE466572B (sv) * 1990-04-23 1992-03-02 Volvo Ab Maetfoerfarande vid fordon, saerskilt foer bestaemning av rotationshastigheten hos en vevaxel i en foerbraenningsmotor
DE4341826C2 (de) * 1992-12-18 2002-11-07 Volkswagen Ag Verfahren und Vorrichtung zur Bestimmung des Ladezustandes eines elektrischen Energiespeichers
JPH06222119A (ja) * 1993-01-25 1994-08-12 Minoru Ota バッテリ良否判別装置
JPH09158716A (ja) * 1995-12-08 1997-06-17 Toyota Motor Corp 電気加熱式触媒の通電制御装置
JPH10300830A (ja) * 1997-04-23 1998-11-13 Oki Electric Ind Co Ltd バッテリー劣化判定回路
JP3659772B2 (ja) * 1997-08-07 2005-06-15 三菱自動車工業株式会社 バッテリの劣化判定装置
DE19831723A1 (de) * 1998-07-15 2000-01-20 Porsche Ag Verfahren zur Ladezustanderkennung einer Fahrzeugbatterie
JP3414310B2 (ja) * 1998-09-25 2003-06-09 トヨタ自動車株式会社 エンジンの始動制御装置
US6404163B1 (en) 2001-06-25 2002-06-11 General Motors Corporation Method and system for regulating a charge voltage delivered to a battery

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3901680A1 (de) * 1988-09-13 1990-03-22 Duerrwaechter E Dr Doduco Verfahren zur ueberwachung der kaltstartfaehigkeit der starterbatterie eines verbrennungsmotors

Also Published As

Publication number Publication date
JP2004504973A (ja) 2004-02-19
US20030076108A1 (en) 2003-04-24
JP4724352B2 (ja) 2011-07-13
DE10036341A1 (de) 2002-02-07
US6696842B2 (en) 2004-02-24
WO2002008777A1 (fr) 2002-01-31

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