EP2044669A1 - Raccordement de charge pour des éléments de batterie - Google Patents

Raccordement de charge pour des éléments de batterie

Info

Publication number
EP2044669A1
EP2044669A1 EP07729430A EP07729430A EP2044669A1 EP 2044669 A1 EP2044669 A1 EP 2044669A1 EP 07729430 A EP07729430 A EP 07729430A EP 07729430 A EP07729430 A EP 07729430A EP 2044669 A1 EP2044669 A1 EP 2044669A1
Authority
EP
European Patent Office
Prior art keywords
current
voltage sources
bypass
charging
individual
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
EP07729430A
Other languages
German (de)
English (en)
Inventor
Michael Wolf
Marcus Bremmer
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 EP2044669A1 publication Critical patent/EP2044669A1/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
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits

Definitions

  • DE 101 50 376 A1 relates to a device for balancing the state of charge of accumulators connected in series.
  • a capacitor is provided as well as a plurality of switches arranged between the capacitor and the accumulators.
  • the device has a logic which serves to measure the voltages applied to the accumulators and when the predefined difference threshold value between the voltages applied to the accumulators is exceeded in order to activate a driver controlling the switches.
  • the capacitor is alternately connectable to the individual accumulators for the purpose of charge exchange via the switches.
  • the device known from DE 101 50 376 A1 also has two series-connected accumulators and four switches.
  • a first of the switches is between a first terminal of the capacitor and the ground remote terminal of the series-connected accumulators, a second of the switches is between the second terminal of the capacitor and ground, a third of the switch is between the second terminal of the capacitor and the connection point between the two accumulators and a fourth of the switches is arranged between the first terminal of the capacitor and the connection point between the two accumulators.
  • the voltage on the individual cells depends on their "health status" or the prevailing internal resistance when charging the battery system used, the sensitive to overvoltages, so the charging of the battery system is terminated when the maximum permissible cell voltage is reached at one of the series-connected single cells.
  • the lifetime of the battery system is the higher, the more homogeneous the single cells can be charged. Since there are single cells in the charging process in the case of inhomogeneity within the battery system, in which the maximum permissible cell voltage value is reached before other single cells reach this, the charging process is switched off, although some of the cells are not yet fully charged. During unloading, the non-fully charged single cells first reach a previously defined lower voltage source and the discharging process is terminated even though single cells are still available in the battery system that could deliver charge. This inhomogeneity effect may increase over the operating time as well as depending on the number of charging or discharging cycles to which the battery system is subjected. The greater the inhomogeneity, the smaller the stroke between removable and chargeable energy.
  • the invention has for its object to increase the life of a battery system by the individual cells are held each other in a homogeneous state of charge state.
  • an energy source connected to the battery system from the outside is used to achieve a more homogeneous charge distribution.
  • the selection of the individual cells of the battery system can be determined with a larger bandwidth.
  • the more homogeneous charge distribution within the battery system is achieved by the connection of one bypass each via each individual cell of the operating system.
  • either at least one resistor or at least one inductance can be connected in series in the bypass.
  • Each bypass via each individual cell of the battery system is assigned a bypass switch, which passes the charging current to the respective individual cell.
  • the height of the bypass current can be controlled by a clocked Ein facedung the bypass switch such that the average current from the single cell is approximately equal to 0.
  • I ⁇ y current through the single-cell bypass
  • Izz current from a single cell
  • I L charging current of the battery system
  • either the voltage across the individual cells can be monitored, which is then monitored that this does not exceed the maximum allowable limit or it can be a sensor per single cell are used, the current through the single cell measures or presents.
  • the respective individual cells of the battery system associated bypass are then switched active during the charging of the battery system when the voltage at the respective single cell reaches the maximum allowable voltage. These single cells are fully charged in this case and require no further charge. The individual cells, on the other hand, have lower charge states, have not reached their maximum allowable voltage value and therefore can take up more charge.
  • the charging process is ended when either all individual cells or a previously defined number of individual cells have reached their maximum permissible voltage value.
  • the charging current I L can be limited by the voltage or current source by means of an intelligent control by the battery charging control. The charging current limit is then activated when one or more bypasses assigned to the individual cells of the battery system are activated.
  • the sole FIGURE shows a charging circuit for series-connected battery cells for homogenizing the charge distribution.
  • the single FIGURE shows an embodiment variant of the device proposed according to the invention for charging a battery system with a number of single-voltage sources connected in series.
  • the drawing shows that the charging circuit proposed according to the invention has a voltage source 10, via which a battery system 12 is charged.
  • the battery system 12 comprises individual voltage sources 14.1, 14.2,... 14n, which are arranged in series connection 16 within the battery system 12.
  • the number of arranged in the battery system 12 single voltage sources 14.1, 14.2, ... 14.n is arbitrary. It is important that the individual voltage sources 14.1, 14.2,... 14n are arranged in series connection 16.
  • the battery system 12 as shown in the drawing is associated with a battery charge controller 24.
  • Each of the individual voltage sources 14.1, 14.2,... 14n of the battery system 12 has a bypass 18.1, 18.2,... 18.n.
  • Each of the individual bypass voltage sources 14.1, 14.2,... 14n assigned bypass 18.1, 18.2,... 18n can be connected to the respective single voltage source 14.1, 14.2,.
  • at least one resistor or also at least one inductor can be arranged serially to limit the current.
  • each of the bypass 18.1, 18.2,... 18n is assigned a bypass switch 20.1, 20.2,.
  • a voltmeter 26 is included in each of the bypass 18.1, 18.2,... 18n. Instead of the respective voltage in the individual voltage sources 14.1, 14.2,...
  • the respective individual voltage sources 14.1, 14.2, ... 14.n also be associated with a sensor which either by the respective single voltage source 14.1 , 14.2, ... 14.n measures flowing current or represents the current flowing through the respective individual voltage source 14.1, 14.2,.
  • I L of the voltage source 10 to the battery system 12 transmitted charge current is indicated.
  • I By, i n the current is identified via the bypass 18.1, 18.2,... 18.n, with I Bz , in which current is established via the respective individual voltage source 14.1, 14.2,.
  • the voltage source 10 which is present on the system side and connected from the outside to the battery system 12 is used to achieve a homogeneous charge distribution used within the battery system 12.
  • the respective individual voltage sources 14.1, 14.2, ... 14.n no transformers are required, furthermore, the selection of individual voltage sources 14.1, 14.2, ... 14.n for the battery system 12 with a larger bandwidth, ie a greater tolerance can be determined.
  • the voltage at the individual voltage sources 14.1, 14.2, ... 14.n can be detected by means of voltmeters 26.
  • the voltage at the respective individual voltage sources 14.1, 14.2,... 14.n must not exceed the maximum permissible limit value during the charging process.
  • the current through the respective individual voltage sources 14.1, 14.2, ... 14.n are indicated by I Bz, i n with one of the respective single voltage source 14.1, 14.2, ... 14.nn associated sensor which measures either the current or represented.
  • the respective bypass 18.1, 18.2, ... 18. n are respectively activated at the individual voltage sources 14.1, 14.2,... 14.n during the charging process of the battery system 12 by the externally arranged voltage source 10 when the voltage at the respective individual voltage sources 14.1, 14.2,. n reaches the maximum permissible voltage value.
  • those of the individual voltage sources 14.1, 14.2,... 14.n are fully charged and do not require any further charging by the charging current I L fed from the voltage source 10.
  • those of the individual voltage sources 14.1, 14.2,..., 14n with lower charge states still have their respective maximum permissible voltage value not reached and can be charged by the externally arranged voltage source 10 on.
  • the charging process is ended when either all individual voltage sources 14.1, 14.2,... 14.n or a previously defined number of individual voltage sources 14.1, 14.2,... 14.n have reached their maximum permissible voltage value.
  • the condition "all cells” or the condition "defined number of cells charged with maximum allowable voltage” can be used. This depends on the application purpose of the charging circuit according to the invention for the battery system 12, or depending on the allowable power loss, which can be dissipated by the bypass circuits.
  • the charging current I L can be limited by the voltage or current source 10 by means of a control by the battery charging control 24.
  • the charging current limit for the charging current I L can be activated, in particular, if one or more of the bypass 18.1, 18.2,... 18.n are activated.
  • A denotes sensors for detecting the current in the individual voltage sources 14. 1 to 14. N, which can be used as an alternative to the voltage meters 26.
  • resistors or inductors may be connected in series, further, the bypass switches 20.1 to 2O.n may be designed as a discrete switch as a semiconductor switch.
  • the inventively proposed device for charging the battery system 12 an inhomogeneous charge distribution within the single voltage sources 14.1, 14.2, ... 14.n within the battery system 12 can be avoided.

Landscapes

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

Abstract

L'invention concerne un dispositif servant à charger un système de batterie (12) avec un nombre de sources de tension individuelles (14.1,...14.n) montées en série par une source de tension (10). Une dérivation (18.1,...18.n) est affectée aux sources de tension individuelles (14.1,...14.n). Grâce à cette dérivation, un courant de charge IL est amené à partir de la source de tension (10) en fonction de l'état de charge des sources de tension individuelles (14.1,...14.n) à ces dernières.
EP07729430A 2006-07-18 2007-05-23 Raccordement de charge pour des éléments de batterie Ceased EP2044669A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006033171A DE102006033171A1 (de) 2006-07-18 2006-07-18 Ladeschaltung für Batteriezellen
PCT/EP2007/054992 WO2008009502A1 (fr) 2006-07-18 2007-05-23 Raccordement de charge pour des éléments de batterie

Publications (1)

Publication Number Publication Date
EP2044669A1 true EP2044669A1 (fr) 2009-04-08

Family

ID=38512633

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07729430A Ceased EP2044669A1 (fr) 2006-07-18 2007-05-23 Raccordement de charge pour des éléments de batterie

Country Status (4)

Country Link
US (1) US8253379B2 (fr)
EP (1) EP2044669A1 (fr)
DE (1) DE102006033171A1 (fr)
WO (1) WO2008009502A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8427099B2 (en) * 2008-09-30 2013-04-23 Haemonetics Corporation Monitor for charging series connected batteries
DE102009000504B4 (de) 2009-01-30 2022-02-24 Robert Bosch Gmbh Batteriemodul
DE102010021707B4 (de) * 2010-05-27 2024-05-02 Sew-Eurodrive Gmbh & Co Kg Anordnung und Verfahren zum Betreiben einer Anordnung
DE102011079360A1 (de) 2011-07-19 2013-01-24 Sb Limotive Company Ltd. Vorrichtung und Verfahren zur Messung einer maximalen Zellspannung
DE102012200508A1 (de) * 2012-01-13 2013-07-18 Robert Bosch Gmbh Batteriesensor
FR2993417B1 (fr) 2012-07-10 2014-07-18 Batscap Sa Procede de charge d'une batterie et batterie ainsi chargee
US9876347B2 (en) * 2012-08-30 2018-01-23 Siemens Aktiengesellschaft Apparatus and methods for restoring power cell functionality in multi-cell power supplies
DE102013003122A1 (de) * 2013-02-12 2014-11-27 Jungheinrich Aktiengesellschaft Akkumulator mit einer Vielzahl von Batteriezellen sowie Verfahren zum Betrieb eines solchen

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3231801B2 (ja) * 1991-02-08 2001-11-26 本田技研工業株式会社 バッテリの充電装置
JPH07336905A (ja) * 1994-06-08 1995-12-22 Nissan Motor Co Ltd 組電池の充電装置
US6329792B1 (en) 1997-07-04 2001-12-11 Estco Energy Inc. Device and system for management of battery back up power source
JPH11155241A (ja) * 1997-11-21 1999-06-08 Hitachi Ltd 組電池充電電流制御回路および組電池充電方法
JPH11234916A (ja) * 1998-02-16 1999-08-27 Rohm Co Ltd リチウムイオン電池パック
US6140800A (en) * 1999-05-27 2000-10-31 Peterson; William Anders Autonomous battery equalization circuit
US6271646B1 (en) * 2000-07-05 2001-08-07 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Battery cell by-pass circuit
US6271648B1 (en) 2000-09-27 2001-08-07 Ford Global Tech., Inc. Method of preconditioning a battery to improve cold temperature starting of a vehicle
DE10150376A1 (de) 2001-10-11 2003-04-17 Bosch Gmbh Robert Vorrichtung zum Ausgleich des Ladezustands von in Reihe geschalteten Akkumulatoren
JP2005318751A (ja) * 2004-04-30 2005-11-10 Shin Kobe Electric Mach Co Ltd 多直列電池制御システム
JP4400536B2 (ja) * 2004-12-27 2010-01-20 日産自動車株式会社 組電池の容量調整装置および容量調整方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2008009502A1 *

Also Published As

Publication number Publication date
US8253379B2 (en) 2012-08-28
WO2008009502A1 (fr) 2008-01-24
US20110254499A1 (en) 2011-10-20
DE102006033171A1 (de) 2008-01-24

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