EP1896864A1 - Detection de l'etat d'une batterie pour accumulateurs de vehicule a moteur - Google Patents

Detection de l'etat d'une batterie pour accumulateurs de vehicule a moteur

Info

Publication number
EP1896864A1
EP1896864A1 EP06755075A EP06755075A EP1896864A1 EP 1896864 A1 EP1896864 A1 EP 1896864A1 EP 06755075 A EP06755075 A EP 06755075A EP 06755075 A EP06755075 A EP 06755075A EP 1896864 A1 EP1896864 A1 EP 1896864A1
Authority
EP
European Patent Office
Prior art keywords
battery
voltage
group
sub
soc
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Withdrawn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
EP06755075A
Other languages
German (de)
English (en)
Inventor
Christoph Wenger
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 EP1896864A1 publication Critical patent/EP1896864A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/04—Voltage dividers
    • 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]
    • 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]
    • G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
    • G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
    • G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries

Definitions

  • the invention relates to a method for determining the state of a battery, in particular a vehicle battery, according to the preamble of patent claim 1, as well as a corresponding device according to the preamble of patent claim 7.
  • Conventional vehicle batteries e.g. NiMH or lead-acid batteries typically consist of several series-connected single cells each generating a sub-voltage of a few volts (e.g., 2V). The number of cells determines the rated voltage of the battery. For example, a battery with a rated voltage of 12V includes 6 cells, each about 2V. In on-board networks with higher mains voltage, e.g. 24V or 42V usually several 12V batteries are connected in series.
  • BZE battery condition detection devices
  • the individual cells of a battery or the individual series-connected (12V) batteries do not behave completely the same over their service life. This limits the performance of the overall battery because it can not be discharged until the weakest cell discharges and can not be recharged until the strongest cell is fully charged.
  • it is known not only to analyze the state of the whole battery, but also to determine the state of individual cells or groups of cells. For this purpose, it is necessary to measure the voltage drop across the cells and supply it to the BZE. However, the measuring voltages refer to different reference potentials. For a 24V battery, the z.
  • the reference potential of the first battery (with 24V and 12V terminals) is + 12V with respect to the body, while the reference potential of the second component battery (with 12V terminal voltages and ground) is grounded .
  • This causes difficulties in signal processing, since conventional control devices usually have only signal inputs that are designed for ground as a reference potential.
  • the potential difference must be corrected either in the voltage sensor of the first sub-battery or in the control unit.
  • One way of correcting is e.g. in that the voltage of the first sub-battery (with reference potential + 12V) by means of a differential amplifier to refer to ground.
  • the circuit complexity in this solution is relatively high.
  • An essential idea of the invention is to calculate the battery size (eg the voltage, the state of charge or the internal resistance) of a group of cells whose reference potential is unequal to ground from the voltages of two other groups whose voltages are at the same reference potential, preferably ground, Respectively.
  • the battery size is determined by measuring the voltage dropped across a first cell group and the voltage dropping across a second cell group comprising the first group and the third group, and the battery size of the third group based on the two measured voltages is calculated. This has the significant advantage that the cell voltage of the third group is not measured and thus no voltage signal must be processed with a different reference potential.
  • a cell group may comprise one or more cells according to the invention.
  • a battery state quantity such as a battery state variable, is used here. the state of charge SOC, the. Aging state (or performance) SOH or other state variable, and in particular the external voltage, the internal resistance Ri or any other electrical battery size understood.
  • the voltage drop across the cell group can be calculated from the measured first (Ui) and second (Ug) voltage.
  • the following applies for the third voltage (U2): U2 U g -Ui.
  • another battery size such as the state of charge of the third group can be calculated.
  • the voltages U 2 , U 9 of the first and second cell group are first measured, from each of which a battery size, such as the state of charge, calculated and then calculates the value of this battery size for the third group.
  • the first and second voltages preferably have the same reference potential, in particular ground.
  • the voltage sensor preferably comprises separate sensors for the first and second cell groups.
  • a single voltage sensor could be provided, which can be switched between the first and second group.
  • the voltage sensor preferably comprises a voltage divider which reduces the measurement voltage to a predetermined voltage range.
  • the voltage sensor preferably also includes an A / D converter that samples and digitizes the analog voltage signal.
  • FIG. 1 is a schematic representation of an arrangement for determining a battery state variable according to an embodiment of the invention.
  • Fig. 1 shows an arrangement for determining a battery size, e.g. of the state of charge SOC of a battery 1.
  • the battery 1 here comprises two series-connected 12V accumulators 2a, 2b, each consisting of a plurality of individual cells 1a-1f and 1g-1 l.
  • a mathematical battery model 7 is provided which is stored in a control unit 6 as software.
  • the model 7 can z. B. determine the state of charge SOC of the batteries 2a, 2b or the total battery 1 from the impulse response of the voltages Ui 1 Ib and U 9 to a current pulse. (A small modification of the interconnection could also be used to determine the battery size of individual cells 1a-1 l or cell groups.)
  • the assembly further comprises a first voltage sensor 4, the voltage dropping at the first accumulator 2a voltage Ui and a second voltage sensor 5 that measures the voltage dropping at the overall battery voltage U 1.
  • the analog measured values Ui, U 9 are digitized by means of A / D converters (not shown) and fed digitally to the control unit 6.
  • the current I flowing through the battery 1 is measured by means of a current sensor 3.
  • one or more temperature sensors may be provided.
  • the control unit 6 has here only interfaces that relate to ground. It is therefore not readily possible, the controller 6, the voltage U2, which has a different reference potential supply. In order to nevertheless the voltage U2 or another, to determine battery 2b variable in question the accumulator, the battery model 7 is realized such that the voltage U 2 or the battery size of the accumulator 2b from the voltages Ui and U is calculated. 9 For the voltage U 2, the following applies:
  • U 2 U 9 -Ui From the calculated voltage U 2 , in turn, the impulse response to a current pulse, taking into account the battery current I and the battery temperature T evaluated and thereby the state of charge SOC of the accumulator 2b or another battery size, such as the aging state (SOH) or internal resistance Ri are calculated.
  • SOH aging state
  • Ri internal resistance
  • the battery size (SOC 1 SOH 1 Ri) of the second accumulator 2 b could also be determined without calculation of U 2 by being determined from the corresponding magnitudes of the first accumulator 2 a and the overall battery 1.
  • the state of charge SOC of the first accumulator 2a and of the total battery 1 are determined with the aid of the battery model 7 and from this the charge state SOC of the second accumulator 2b is calculated.
  • another size could be calculated from the state of charge.
  • FIG. 2 again shows the essential method steps for determining the state of charge SOC of the second accumulator 2b in the form of a flow chart.
  • step 10 initially the dropping at the first accumulator 2a voltage Ui and in step 11, the sloping of the total battery voltage U 1 9 are measured by the sensors 4,5 and supplied to the controller. 6
  • the battery model 7 then calculates the voltage U 2 dropping at the second accumulator 2 b in step 12 and, in step 13, determines the state of charge SOC of the second accumulator.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Secondary Cells (AREA)

Abstract

Procédé de détermination d'une grandeur (U<SUB>2</SUB>, SOC, R<SUB>i</SUB>) d'une batterie (1), en particulier d'une batterie de véhicule à moteur, pourvue de plusieurs cellules (1a-1l) couplées en série. Pour déterminer la grandeur de batterie pour un groupe de cellules (1a-1l) dont le potentiel de référence n'est pas égal à la masse, la grandeur de batterie est calculée. La tension (U<SUB>1</SUB>) chutant à un premier groupe (2a) de cellules et la seconde tension (U<SUB>g</SUB>) chutant à un deuxième groupe de cellules (1) qui contient le premier groupe (2a) et un troisième groupe (2b) sont mesurées et la grandeur (U<SUB>2</SUB>, SOC, R<SUB>i</SUB>) de batterie du troisième groupe (2b) est calculée sur la base des première et seconde tensions (U<SUB>1</SUB>, U<SUB>g</SUB>) mesurées.
EP06755075A 2005-06-23 2006-05-08 Detection de l'etat d'une batterie pour accumulateurs de vehicule a moteur Withdrawn EP1896864A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005029096A DE102005029096A1 (de) 2005-06-23 2005-06-23 Batteriezustandserkennung für Kfz-Akkumulatoren
PCT/EP2006/062130 WO2006136475A1 (fr) 2005-06-23 2006-05-08 Detection de l'etat d'une batterie pour accumulateurs de vehicule a moteur

Publications (1)

Publication Number Publication Date
EP1896864A1 true EP1896864A1 (fr) 2008-03-12

Family

ID=36809000

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06755075A Withdrawn EP1896864A1 (fr) 2005-06-23 2006-05-08 Detection de l'etat d'une batterie pour accumulateurs de vehicule a moteur

Country Status (5)

Country Link
EP (1) EP1896864A1 (fr)
JP (1) JP2008547008A (fr)
KR (1) KR20080025076A (fr)
DE (1) DE102005029096A1 (fr)
WO (1) WO2006136475A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT508307B1 (de) * 2010-06-24 2015-01-15 Avl List Gmbh Verfahren zur bestimmung eines zustands von zellen einer energiespeichervorrichtung
DE102010045514B4 (de) 2010-09-15 2018-03-29 Audi Ag Verfahren zum Überwachen eines elektrischen Energiespeichers, der eine elektrische Spannung für eine elektrische Maschine eines Kraftwagens bereitstellt
MX2013006438A (es) 2010-12-10 2013-06-28 Nissan Motor Dispositivo de medicion de resistencia interna y metodo para bateria aplilada.
DE102011002968A1 (de) * 2011-01-21 2012-07-26 Robert Bosch Gmbh Vorrichtung und Verfahren zur Ermittlung einer Zustandsgröße einer Fahrzeugbatterie
FR2999721B1 (fr) * 2012-12-18 2019-06-14 Blue Solutions Procede et dispositif de caracterisation d'un module de stockage d'energie par effet capacitif.
US9318781B2 (en) * 2013-01-11 2016-04-19 Johnson Controls Technology Company Predicted sensor information for a battery
DE102014018640B3 (de) * 2014-12-13 2016-03-03 Audi Ag Verfahren zur elektrischen Widerstandsmessung im Kraftfahrzeug und Kraftfahrzeug
KR102256602B1 (ko) 2017-12-14 2021-05-26 주식회사 엘지에너지솔루션 전압 측정 장치 및 방법
CN110208715B (zh) * 2019-07-02 2021-09-17 上海禾他汽车科技有限公司 一种测量汽车电池包电荷状态的方法及汽车电池管理***

Citations (1)

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Publication number Priority date Publication date Assignee Title
US6104164A (en) * 1998-10-20 2000-08-15 Denso Corporation Cell voltage detecting device for combination battery

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GB9219422D0 (en) * 1992-09-14 1992-10-28 Silent Power Gmbh Apparatus for monitoring the voltage of a dc supply
JPH09163501A (ja) * 1995-12-08 1997-06-20 Toyota Autom Loom Works Ltd 電動車両のバッテリ監視装置
JPH11174135A (ja) * 1997-12-09 1999-07-02 Yazaki Corp 電池残存容量測定装置
JP3738363B2 (ja) * 1999-03-05 2006-01-25 株式会社デンソー 発電型電気自動車の電池制御方法
JP4186393B2 (ja) * 2000-07-26 2008-11-26 株式会社デンソー 電池電圧検出装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6104164A (en) * 1998-10-20 2000-08-15 Denso Corporation Cell voltage detecting device for combination battery

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2006136475A1 *

Also Published As

Publication number Publication date
KR20080025076A (ko) 2008-03-19
WO2006136475A1 (fr) 2006-12-28
JP2008547008A (ja) 2008-12-25
DE102005029096A1 (de) 2007-01-04

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