EP1350295A2 - Procede et dispositif de charge d'elements de batterie montes en serie - Google Patents

Procede et dispositif de charge d'elements de batterie montes en serie

Info

Publication number
EP1350295A2
EP1350295A2 EP02718018A EP02718018A EP1350295A2 EP 1350295 A2 EP1350295 A2 EP 1350295A2 EP 02718018 A EP02718018 A EP 02718018A EP 02718018 A EP02718018 A EP 02718018A EP 1350295 A2 EP1350295 A2 EP 1350295A2
Authority
EP
European Patent Office
Prior art keywords
voltage
cell
cells
battery cells
arrangement according
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.)
Ceased
Application number
EP02718018A
Other languages
German (de)
English (en)
Inventor
Peter Kornetzky
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.)
Institut fur Mikroelektronisch- und Mechatronik-Systeme GmbH
Original Assignee
Institut fur Mikroelektronisch- und Mechatronik-Systeme 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 Institut fur Mikroelektronisch- und Mechatronik-Systeme GmbH filed Critical Institut fur Mikroelektronisch- und Mechatronik-Systeme GmbH
Publication of EP1350295A2 publication Critical patent/EP1350295A2/fr
Ceased legal-status Critical Current

Links

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

Definitions

  • the invention relates to a method and an arrangement for charging series-connected battery cells by means of a common charging current.
  • the invention has for its object to provide a method and an arrangement of the type mentioned, with which an individual adjustment of the charging current of each battery cell is possible with simple means.
  • the line voltages of two battery cells are then compared by means of a voltage comparison circuit, and the charging current of the battery cell with the higher voltage in each case is at least partially shunted after a predetermined difference in the line voltages has been exceeded.
  • the voltages of neighboring cells are expediently compared with one another.
  • a preferred arrangement for carrying out the method according to the invention has - a voltage tap on each pole of a battery cell, a voltage comparator circuit for two battery cells to which the voltage taps of these two battery cells are connected, - a bypass on each which can be controlled as a function of the output signals of the voltage comparator circuit battery cell.
  • the comparator circuit is followed by a logic arrangement, which evaluates the states of the comparators and controls the bypasses according to a self-determined or externally determined time regime.
  • the comparators can be implemented, for example, by operational amplifiers.
  • a protective function for detecting the cell voltage can also be implemented, which signals that the permissible limit values have been exceeded. This protects the cell from overcharging. If necessary, the overvoltage status should be queried clocked. Furthermore, after the final charge voltage of the first cell in the system has been reached, it makes sense to limit the charge current in order to prevent the affected cell from being charged further.
  • the voltage monitoring can be limited to individual cells, since with the method according to the invention the final charge voltage of the cells is reached almost simultaneously.
  • two digital channels are provided for the transmission of the state when comparing neighboring cells.
  • B. arise in battery arrays with a large number of cells.
  • the algorithm for charge equalization can be designed in such a way that charge equalization begins at the beginning of a charging process, as a result of which the equalizing currents at the bypass are distributed over a longer period of time and thus result in advantages in the thermal load on the overall system.
  • the interrogation of the cell voltages and the connection of the bypasses take place in succession. Since the connection of a bypass the Charging current of the assigned cell and thus its voltage, the comparators are queried when the bypasses are switched off after a cell-dependent stabilization time.
  • logic circuits can be provided, which are clocked in a time-coordinated manner.
  • the operating states of the bypasses, the comparators and, if applicable, the voltage monitoring can be recorded in central electronics. B. from the frequency of connecting a bypass to the capacity of the cell (e.g. the cell in which the bypass is switched on most often is the one with the lowest capacity). In addition, the capacity relationships can also be recorded over a longer period of time in order to be able to derive relative changes in cell capacities.
  • the bypasses can be electronic switches in series with resistors or transistors, the current of which can be regulated.
  • inductively recover the energy that is converted when the current flows past a cell by connecting inductive components in series to the electronic switch, which transfer the absorbed electrical energy to separate energy stores or to the Supply charging current source or to other battery cells or other electrical consumers.
  • the mode of operation of the method will be explained in more detail with reference to the exemplary embodiments shown in the drawings. Show it
  • Fig. 1 shows an arrangement according to the invention with two battery cells connected in series and
  • Fig. 2 shows a corresponding arrangement for four battery cells.
  • FIG. 1 shows an arrangement of two cells n and n + 1 connected in series. Both cells are provided with a bypass n and bypass n + 1, which allow parts or the entire amount of the incoming charging current IL to bypass the cells n and n + 1, respectively, so that the remaining charging current ILn and ILn + 1 of the cells n and n + 1 is influenced.
  • the line voltages are tapped at points A, B and C and fed to an evaluation circuit.
  • This consists of an arrangement of resistors R1, R2 and R3, the resistors R1 and R3 each having the same size, a comparator circuit and a logic circuit.
  • the resistors R1, R2, R3 are dimensioned with respect to one another in such a way that the greater part of the voltage between points A and C across the resistors R1 and R3 drops.
  • the voltage drop across the resistor R2 is referred to as the tolerance voltage Vtol.
  • a comparator UI compares the voltage present between points B and D and gives a high signal at its output out_a if the sum of the voltage Vn on cell n and the tolerance voltage Vtol becomes greater than the voltage Vn + 1 on cell n +1. If, on the other hand, the sum of the voltages Vn + 1 and Vtol is greater than the voltage Vn, the output out_b of a comparator U2 goes high. If both comparator outputs out_a, out_b are low, the difference between the two line voltages Vn, Vn + 1 lies within the specified tolerance voltage Vtol.
  • the output signals of the comparators UI, U2 are evaluated at times which are predetermined by the logic.
  • the logic also determines the connection of the bypasses n and n + 1 according to a predetermined algorithm, in which other criteria such as B. reaching a predetermined final charge voltage for the cells, dynamic effects when charging the cells, the balance between the charging currents ILn and ILn + 1 and / or other criteria can be taken into account.
  • FIG. 1 A corresponding arrangement for four cells n ... n + 3 is shown in FIG. 2.
  • A, B, C points for voltage tap

Landscapes

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

Abstract

Dans le cas de systèmes d'éléments particulièrement sensibles, le courant de charge de chaque élément individuel doit être réglé individuellement afin d'éviter toute surcharge de cellules individuelles, et donc leur destruction. Le procédé de charge peut être simplifié considérablement par comparaison des tensions d'éléments respectivement de deux éléments de batterie au moyen d'un circuit comparateur de tension, et dérivation au moins partielle du courant de charge de l'élément de batterie présentant la tension respectivement supérieure après dépassement d'une différence prédéfinie entre les tensions d'éléments. Le procédé selon l'invention sert par exemple à la charge d'éléments ioniques au lithium.
EP02718018A 2001-01-10 2002-01-10 Procede et dispositif de charge d'elements de batterie montes en serie Ceased EP1350295A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10100945 2001-01-10
DE2001100945 DE10100945B4 (de) 2001-01-10 2001-01-10 Verfahren und Anordnung zum Laden von seriell geschalteten Batteriezellen
PCT/EP2002/000184 WO2002063741A2 (fr) 2001-01-10 2002-01-10 Procede et dispositif de charge d'elements de batterie montes en serie

Publications (1)

Publication Number Publication Date
EP1350295A2 true EP1350295A2 (fr) 2003-10-08

Family

ID=7670216

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02718018A Ceased EP1350295A2 (fr) 2001-01-10 2002-01-10 Procede et dispositif de charge d'elements de batterie montes en serie

Country Status (3)

Country Link
EP (1) EP1350295A2 (fr)
DE (1) DE10100945B4 (fr)
WO (1) WO2002063741A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10260373A1 (de) * 2002-12-13 2004-06-24 Volkswagen Ag Verfahren und Vorrichtung zur Funktionszustandsprüfung eines elektrischen Energie-Systems sowie ein zugehöriges elektrisches Energie-System
DE102007042578B4 (de) * 2007-09-07 2012-12-20 Continental Automotive Gmbh Verfahren zum Vergleichmäßigen von mehreren, in Reihe geschalteten Zellen einer Batterie
US8143862B2 (en) * 2009-03-12 2012-03-27 02Micro Inc. Circuits and methods for battery charging
DE102009002202A1 (de) * 2009-04-06 2010-10-14 Beckhoff Automation Gmbh Schaltung und Verfahren zur unterbrechungsfreien Stromversorgung elektronischer Baugruppen
DE102012201602B4 (de) * 2012-02-03 2023-03-02 Robert Bosch Gmbh Verfahren und Steuereinrichtung zum Einstellen eines durch einen Batteriestrang fließenden Stromes

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB430791A (en) * 1934-10-25 1935-06-25 Accumulatorenfabrik Ag A method of and apparatus for charging accumulator batteries in series
FR2725849B1 (fr) * 1994-10-18 1996-12-20 Accumulateurs Fixes Procede de regulation de la charge d'un ensemble accumulateur electrique et agencement mettant en oeuvre ce procede
CA2169706A1 (fr) * 1995-03-03 1996-09-04 Troy Lynn Stockstad Circuit de commande de charge d'une batterie d'accumulateurs, et methode connexe
DE29521212U1 (de) * 1995-05-22 1996-10-17 Mentzer Electronic GmbH, 61200 Wölfersheim Einrichtung zum Messen von Teilspannungen
US5631534A (en) * 1995-08-21 1997-05-20 Delco Electronics Corp. Bidirectional current pump for battery charge balancing
JP3421519B2 (ja) * 1996-02-13 2003-06-30 三洋電機株式会社 過充電防止回路、過放電防止回路及び充放電制御回路
DE19705192A1 (de) * 1996-02-29 1997-10-30 Mikron Ges Fuer Integrierte Mi Batterie-Überwachungssystem
JPH10191574A (ja) * 1996-12-26 1998-07-21 Japan Tobacco Inc 充電装置
JP3503414B2 (ja) * 1997-05-12 2004-03-08 日産自動車株式会社 組電池の単電池間充電率調整装置
JP3503453B2 (ja) * 1997-12-26 2004-03-08 株式会社日立製作所 電池システム及びそれを用いた電気自動車

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02063741A3 *

Also Published As

Publication number Publication date
WO2002063741A3 (fr) 2003-03-20
DE10100945B4 (de) 2004-12-02
WO2002063741A2 (fr) 2002-08-15
DE10100945A1 (de) 2002-07-18

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