WO2014187679A1 - Procédé et dispositif de détermination de la charge moyenne d'une batterie - Google Patents

Procédé et dispositif de détermination de la charge moyenne d'une batterie Download PDF

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Publication number
WO2014187679A1
WO2014187679A1 PCT/EP2014/059509 EP2014059509W WO2014187679A1 WO 2014187679 A1 WO2014187679 A1 WO 2014187679A1 EP 2014059509 W EP2014059509 W EP 2014059509W WO 2014187679 A1 WO2014187679 A1 WO 2014187679A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
charge
control signal
average
pwm1
Prior art date
Application number
PCT/EP2014/059509
Other languages
German (de)
English (en)
Inventor
Stefan Butzmann
Original Assignee
Robert Bosch Gmbh
Samsung Sdi Co., Ltd.
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, Samsung Sdi Co., Ltd. filed Critical Robert Bosch Gmbh
Priority to CN201480029140.XA priority Critical patent/CN105229484B/zh
Publication of WO2014187679A1 publication Critical patent/WO2014187679A1/fr

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]
    • G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
    • 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
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a method for determining the average state of charge of a battery and / or other, derived from the average state of charge of the battery characteristics of the battery, the battery comprises at least one battery string with a plurality of battery string each switchable and bridgeable battery cells and the battery cells by means be controlled such a control signal that the battery cells are switched on average so to the battery string, that the output voltage of the battery is set to a desired target output voltage. Furthermore, the invention relates to a corresponding device for determining the average state of charge of a battery and / or other, derived from the average state of charge of the battery characteristics of the battery. The invention also relates to a battery system which has a battery with at least one battery string, which comprises a plurality of battery cells each switchable to the battery string and bridgeable. Furthermore, the invention relates to a vehicle with a battery system.
  • Control variable can be generated according to a pulse width modulation (PWM) or comprise a pulse width modulated signal. Also, the control quantity can be supplied to the battery cells as information via a communication bus.
  • PWM pulse width modulation
  • the control quantity can be supplied to the battery cells as information via a communication bus.
  • FIG. 1 shows a battery system 10 is shown, which includes a battery 20 with a plurality of battery cells 21, which are connectable to the associated battery string 22 and bridged. For simplicity, only a single battery cell 21 has been drawn in Figure 1, which is connectable to the battery string 22.
  • the battery string 22 has a positive battery terminal terminal 23 and a negative battery terminal terminal 24.
  • the positive battery terminal terminal 23 is connected via a line 25 to the positive battery terminal 26.
  • a half-bridge 30 of two transistors 31, 32 is connected in parallel to the battery cell 21 via two terminals 33, 34.
  • the half bridge 30 is connected at its third terminal 35 (optionally via further battery cells with parallel half bridges) to the positive battery terminal 23.
  • Transistor 32 are switched in a non-conductive state, the battery cell 21 is connected to the battery string.
  • the transistor 31 is switched to a non-conductive state and the transistor 32 is switched to a conductive state, the battery cell 21 is bypassed.
  • the microcontroller 50 is further connected via an isolated communication bus 60 to a controller 70.
  • the regulator 70 is connected to the positive one by means of a sense line 71
  • the controller 70th further compares the detected output voltage UB of the battery 20 with a target value U 1 and generates taking into account the number of battery cells n a suitable desired control signal S1, in particular as a
  • pulse width modulated setpoint signal PWM1 is provided to the driver 40 via the communication bus 60 and the microcontroller 50.
  • the driver 40 then controls the transistors 31, 32 by means of the desired control signal S1 in such a way that the battery cells 21 are suitably connected and bridged to generate the desired value U 1 for the output voltage UB of the battery 20 to the battery string.
  • a method for determining the average state of charge of a battery and / or other characteristics of the battery derivable from the average charge state of the battery, wherein the battery comprises at least one battery string with a plurality of battery cells which can be connected and bridged to the battery string. Further, the battery cells are controlled by means of a control signal such that the battery cells are switched on average so to the battery string, that the output voltage of the battery is set to a desired target voltage.
  • the control signal is evaluated taking into account the set target voltage and the battery cell number.
  • a device for determining the average state of charge of a battery and / or other characteristics of the battery which can be derived from the average state of charge of the battery, wherein the
  • Battery comprises at least one battery string with a plurality of the battery string each switchable and bridgeable battery cells.
  • the Device comprises a control device, which is designed to, the
  • the device has an evaluation unit, which is designed to evaluate the control signal taking into account the set nominal voltage and the battery cell number when determining the average state of charge and / or the other, derivable from the average state of charge of the battery characteristics.
  • the battery cells by means of such
  • Control signal to the battery string in the middle switched that a
  • Output voltage of the battery is set to a desired target voltage.
  • the output voltage of the battery is set in the present invention by means of the control signal independent of the battery cell voltages or from the state of charge of the battery cells to the desired desired voltage. This means that the battery cells are controlled by means of such a control signal, that the
  • Control signal by means of which the output voltage of the battery is set to a desired target voltage, depending on the
  • Regulator is set to a desired target voltage to determine in a very simple manner.
  • the dependence of the control signal on the battery cell voltages is used to determine the average state of charge of the battery. This makes it possible to calculate the mean state of charge without the explicit knowledge of the battery cell voltages and their time course, whereby the computational effort in determining the average state of charge of the battery is significantly reduced. Out The thus determined average state of charge of the battery can then also be determined from the average state of charge derivable characteristics of the battery in a very simple manner.
  • control variable in the form of an analog or digital control signal, by means of which control variable the battery cells are actuated for suitable connection to the battery string, make.
  • the control variable behaves inversely proportional to the battery cell voltages.
  • a pulse width modulated signal is used as the control signal.
  • the control signal can be supplied to the battery cells via a communication bus as information.
  • PWM pulse width modulated control signal
  • Control variable in the presence of a low state of charge of the battery cells, a high duty cycle (duty cycle) are set by the controller.
  • a low duty cycle is set by the controller as a control variable in the presence of a high state of charge of the battery cells.
  • the average battery cell voltages each as a quotient between the set target voltage and the product of the number of battery cells and the predetermined by the control signal switch-on probability of the battery cells and / or the duty cycle as a control signal
  • Charging state of the battery determined from the average battery cell voltages. In other words, the average contribution of each battery cell to
  • Output voltage of the battery or to the total voltage of the battery string is equal to the total voltage of the battery string divided by the number of battery cells. Furthermore, the middle one
  • Battery cell voltage in each case equal to the average contribution of each battery cell divided by the switch-on probability or the duty cycle.
  • Batteriestrang located battery cells the average state of charge of the battery can be determined.
  • Another essential aspect of the invention relates to a battery system with a battery having at least one battery string, the more to the
  • each switchable and bridgeable battery cells comprises, wherein the battery system, the inventive device for determining the average state of charge of a battery and / or other, derived from the average state of charge of the battery characteristics of the battery.
  • the battery is a lithium-ion battery.
  • a vehicle is provided with a battery system according to the invention.
  • Figure 1 is a known from the prior art battery system, wherein the battery system comprises a battery with battery cells, which are switchable and bridgeable by means of a control signal to the associated battery string, and
  • FIG. 2 shows a battery system according to a first embodiment of the
  • the battery system comprises a battery
  • Battery cells which can be switched to the associated battery string by means of a suitable control signal and bridged are, and an evaluation unit for evaluating the
  • Control signal includes.
  • FIG. 2 shows a highly schematic diagram of a battery system 10 according to a first embodiment of the invention.
  • the battery system 10 comprises a battery 20 with a battery string 22 having a predetermined number n of battery cells 21, which can be connected to the battery string 22 and bridged.
  • the battery string 22 is connected between the negative battery terminal 24 and the positive battery terminal 26.
  • the battery system 10 of the invention comprises a device 1 1 for determining the average state of charge LZ of the battery 20. Die
  • Inventive device 1 1 comprises a control device 80 and a
  • Evaluation unit 90 The functions of the control device 80 and the
  • Evaluation unit 90 will be described in more detail below.
  • the battery cells 21 are connected at their terminals via a not separately shown integrated electronics in each case with the control device 80.
  • the control device 80 is connected to the battery terminals 24, 26 and designed to detect the output voltage UB of the battery 20 and to compare this detected output voltage UB of the battery 20 with a desired setpoint voltage U 1.
  • control device 80 controls the battery cells 21 by means of such a control signal S1, that the battery cells 21 are switched on average to the battery string 22 so that the output voltage UB of the battery 20 is set to the desired desired voltage U 1.
  • Control device 80 can be a pulse-width modulated control signal S1
  • the battery 20 with battery string 22 and the control device 80 together correspond to the battery system 10 shown in Figure 1, which is why the same reference numerals are used for the designation of the same components. Furthermore, the control device 80 according to the invention is connected to an evaluation unit 90, which is designed to control signal S1 generated by the control device 80 taking into account the set
  • Target output voltage U1 of the battery 20 and the battery cell number n to determine the average state of charge (SOC) LZ of the battery 20 to evaluate.
  • the evaluation unit 90 is also designed to determine other characteristics of the battery 20 that can be derived from the mean charge state LZ of the battery 20.
  • the three arrows shown to the left of the evaluation unit 90 symbolize the information provided by the control unit 80 of the evaluation unit 90, ie the control signal S1 generated as a pulse width modulated signal PWM1, the setpoint voltage U1 for the output voltage of the battery UB, and
  • Battery cell number n which are evaluated to determine the average state of charge LZ of the battery 20 of the evaluation unit 90.
  • the arrow to the right of the evaluation unit 90 symbolizes the average charge state LZ of the battery 20 determined by the evaluation unit 90.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

La présente invention concerne un procédé de détermination de la charge moyenne (LZ) d'une batterie (20) et/ou d'autres grandeurs caractéristiques de celle-ci qui peuvent être dérivées de la charge moyenne (LZ) de la batterie (20). La batterie (20) comprend au moins une chaîne de batterie (22) qui possède plusieurs éléments (21) qui peuvent être respectivement connectés et pontés pour former la chaîne de batterie (22). En outre, les éléments (21) sont activés au moyen d'un signal de commande (S1, PWM1) tel que les éléments (21) sont connectés en moyenne à la chaîne de batterie (22) de façon à ajuster la tension de sortie (UB) de la batterie (20) à une tension de consigne (U1) voulue. Pour déterminer la charge moyenne (LZ) et/ou les autres grandeurs caractéristiques dérivables de la charge moyenne (LZ) de la batterie (20), on évalue le signal de commande (S1, PWM1) en tenant compte de la tension de consigne (U1) fixée et du nombre d'éléments (n).
PCT/EP2014/059509 2013-05-22 2014-05-09 Procédé et dispositif de détermination de la charge moyenne d'une batterie WO2014187679A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201480029140.XA CN105229484B (zh) 2013-05-22 2014-05-09 用于确定蓄电池的平均的充电状态的方法和装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013209386.1A DE102013209386B4 (de) 2013-05-22 2013-05-22 Verfahren und Vorrichtung zur Ermittlung des mittleren Ladezustandes einer Batterie
DE102013209386.1 2013-05-22

Publications (1)

Publication Number Publication Date
WO2014187679A1 true WO2014187679A1 (fr) 2014-11-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/059509 WO2014187679A1 (fr) 2013-05-22 2014-05-09 Procédé et dispositif de détermination de la charge moyenne d'une batterie

Country Status (3)

Country Link
CN (1) CN105229484B (fr)
DE (1) DE102013209386B4 (fr)
WO (1) WO2014187679A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010041059A1 (de) * 2010-09-20 2012-03-22 Robert Bosch Gmbh Verfahren zum Einstellen einer Soll-Ausgangsspannung eines Energieversorgungszweiges eines steuerbaren Energiespeichers
WO2012095207A1 (fr) * 2011-01-12 2012-07-19 Sb Limotive Germany Gmbh Procédé pour commander une batterie et batterie pour réaliser le procédé
DE102011075376A1 (de) * 2011-05-06 2012-11-08 Sb Limotive Company Ltd. Verfahren zur Steuerung einer Batterie sowie eine Batterie zur Ausführung des Verfahrens

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009054924A1 (de) * 2009-12-18 2011-06-22 SB LiMotive Company Ltd., Kyonggi Verfahren zur Ermittlung des Ladezustands eines Batteriepacks
CN102114788B (zh) * 2010-12-28 2013-03-06 吴江合美新能源科技有限公司 电动车动力集成数字管理系统

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010041059A1 (de) * 2010-09-20 2012-03-22 Robert Bosch Gmbh Verfahren zum Einstellen einer Soll-Ausgangsspannung eines Energieversorgungszweiges eines steuerbaren Energiespeichers
WO2012095207A1 (fr) * 2011-01-12 2012-07-19 Sb Limotive Germany Gmbh Procédé pour commander une batterie et batterie pour réaliser le procédé
DE102011075376A1 (de) * 2011-05-06 2012-11-08 Sb Limotive Company Ltd. Verfahren zur Steuerung einer Batterie sowie eine Batterie zur Ausführung des Verfahrens

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
TAESIC KIM ET AL: "Power Electronics-Enabled Self-X Multicell Batteries: A Design Toward Smart Batteries", IEEE TRANSACTIONS ON POWER ELECTRONICS, INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, USA, vol. 27, no. 11, 1 November 2012 (2012-11-01), pages 4723 - 4733, XP011471170, ISSN: 0885-8993, DOI: 10.1109/TPEL.2012.2183618 *

Also Published As

Publication number Publication date
CN105229484B (zh) 2018-12-28
DE102013209386A1 (de) 2014-11-27
CN105229484A (zh) 2016-01-06
DE102013209386B4 (de) 2021-07-15

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