DE102010060403A1 - Method for management of lithium battery utilized as traction battery in e.g. electric car, involves adapting control plan to total capacitance of energy storage, and determining actual state of charge of energy storage - Google Patents
Method for management of lithium battery utilized as traction battery in e.g. electric car, involves adapting control plan to total capacitance of energy storage, and determining actual state of charge of energy storage Download PDFInfo
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- DE102010060403A1 DE102010060403A1 DE102010060403A DE102010060403A DE102010060403A1 DE 102010060403 A1 DE102010060403 A1 DE 102010060403A1 DE 102010060403 A DE102010060403 A DE 102010060403A DE 102010060403 A DE102010060403 A DE 102010060403A DE 102010060403 A1 DE102010060403 A1 DE 102010060403A1
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- energy storage
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- 238000004146 energy storage Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 36
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title description 9
- 229910052744 lithium Inorganic materials 0.000 title description 9
- 238000007599 discharging Methods 0.000 claims abstract description 12
- 230000010354 integration Effects 0.000 claims abstract description 11
- 238000005259 measurement Methods 0.000 claims description 5
- 230000006978 adaptation Effects 0.000 claims 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- YADSGOSSYOOKMP-UHFFFAOYSA-N dioxolead Chemical compound O=[Pb]=O YADSGOSSYOOKMP-UHFFFAOYSA-N 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 229910000464 lead oxide Inorganic materials 0.000 description 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Images
Classifications
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- 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
- H01M10/44—Methods for charging or discharging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
- B60L58/15—Preventing overcharging
-
- 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
-
- 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
- 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
- H02J7/005—Detection of state of health [SOH]
-
- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
Description
Die vorliegende Erfindung betrifft ein Verfahren und eine Vorrichtung zur Bestimmung eines Ladezustandes eines elektrischen Energiespeichers.The present invention relates to a method and a device for determining a state of charge of an electrical energy store.
Die für Hybridfahrzeuge diskutierten Batterien in Lithiumtechnologie bieten auch die Möglichkeit der Verwendung als normale Starterbatterie. Lithium-Batterien erfordern zum Betrieb ein sogenanntes Batteriemanagementsystem, das die sichere Funktion der Batterie sicherstellt und diese vor zerstörerischen Betriebszuständen wie etwa Tiefentladungen schützt. Zur Sicherstellung der sicheren Funktion ist bei Bordnetzanwendungen und beim Einsatz von Energiemanagementverfahren wie zum Beispiel bei der Rekuperation ins Bordnetz sowie bei der Verwendung als Traktionsbatterie bei Hybridfahrzeugen eine genaue Erfassung des jeweiligen aktuellen Ladezustandes der Lithium-Batterie notwendig.The lithium-fueled batteries discussed for hybrid vehicles also offer the option of being used as a normal starter battery. Lithium batteries require a so-called battery management system to operate, which ensures the safe functioning of the battery and protects it from destructive operating conditions such as deep discharges. To ensure safe operation of vehicle electrical systems and the use of energy management procedures such as recuperation in the electrical system and when used as a traction battery in hybrid vehicles an accurate detection of the current state of charge of the lithium battery is necessary.
Im Fall von Lithium-Batterien ist ferner allgemein bekannt, dass die Energiekapazität mit zunehmendem Alter der Lithium-Batterie sinkt und nur relativ ungenau bzw. mit hohem Aufwand anhand der sich ändernden Zellspannung bestimmbar ist.In the case of lithium batteries, it is also generally known that the energy capacity decreases with increasing age of the lithium battery and can only be determined relatively inaccurately or at great expense on the basis of the changing cell voltage.
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Es ist daher eine Aufgabe der vorliegenden Erfindung, ein verbessertes Verfahren und eine verbesserte Vorrichtung zur genauen Bestimmung eines Ladezustandes eines elektrischen Energiespeichers bereitzustellen, wobei gewährleistet wird, dass die zeitliche Änderung der Energiekapazität des elektrischen Energiespeichers erfasst wird.It is therefore an object of the present invention to provide an improved method and an improved apparatus for accurately determining a state of charge of an electrical energy store, wherein it is ensured that the temporal change of the energy capacity of the electrical energy store is detected.
Diese Aufgabe wird erfindungsgemäß durch ein Verfahren zur Bestimmung eines Ladezustandes eines elektrischen Energiespeichers mit den Merkmalen des Patentanspruchs 1 und durch eine Vorrichtung gemäß Patentanspruch 8 gelöst.This object is achieved by a method for determining a state of charge of an electrical energy storage device with the features of
Demgemäß wird bei dem erfindungsgemäßen Verfahren ein Batteriemanagement für einen elektrischen Energiespeicher eines Fahrzeuges bereitgestellt, wobei der elektrische Energiespeicher in mindestens zwei Module unterteilt ist, umfassend die Schritte: Laden und Entladen der mindestens zwei Module des elektrischen Energiespeichers in abwechselnder Reihenfolge in einem Normalbetrieb nach einem vorgebbaren Steuerplan, Entladen eines bestimmten Moduls des elektrischen Energiespeichers in einem Kapazitätermittlungsmodus, wobei anhand von Messdaten einer Entleerung des bestimmten Moduls eine Energiekapazität des bestimmten Moduls des elektrischen Energiespeichers durch ein Integrationsverfahren ermittelt wird und daraus die Gesamtkapazität des elektrischen Energiespeichers abgeleitet wird und Anpassen des vorgebbaren Steuerplans des Batteriemanagements an die ermittelte Gesamtkapazität des elektrischen Energiespeichers, wobei ein aktueller Ladezustand des elektrischen Energiespeichers auf Grundlage der ermittelten Energiekapazität und der abgeleiteten Gesamtkapazität bestimmt wird.Accordingly, in the inventive method, a battery management for an electrical energy storage of a vehicle is provided, wherein the electrical energy storage is divided into at least two modules, comprising the steps: charging and discharging the at least two modules of the electrical energy storage in alternating sequence in a normal operation after a predetermined Control plan, discharging a specific module of the electrical energy storage in a capacitance determination mode, wherein an energy capacity of the particular module of the electrical energy storage is determined by an integration method based on measurement data of emptying the specific module and from the total capacity of the electrical energy storage is derived and adapting the predetermined control plan of the Battery management to the determined total capacity of the electrical energy storage, wherein a current state of charge of the electrical energy storage determined on the basis of the determined energy capacity and the total derived capacity.
Ferner schafft die Erfindung eine Vorrichtung zum Batteriemanagement eines elektrischen Energiespeichers eines Fahrzeuges, wobei der elektrische Energiespeicher in mindestens zwei Module unterteilt ist, welche durch eine Steuereinheit zuschaltbar sind, wobei die mindestens zwei Module des elektrischen Energiespeichers zum Laden und Entladen in abwechselnder Reihenfolge in einem Normalbetrieb nach einem vorgebbaren Steuerplan betreibbar sind, wobei ein bestimmtes Modul des elektrischen Energiespeichers zum Entladen in einem Kapazitätermittlungsmodus betreibbar ist, wobei anhand von Messdaten einer Entleerung des bestimmten Moduls eine Energiekapazität des bestimmten Moduls des elektrischen Energiespeichers durch ein Integrationsverfahren ermittelbar ist und daraus die Gesamtkapazität des elektrischen Energiespeichers ableitbar ist, wobei durch eine Anpassung des vorgebbaren Steuerplans ein aktueller Ladezustand des elektrischen Energiespeichers auf Grundlage der ermittelten Energiekapazität und der abgeleiteten Gesamtkapazität berechenbar ist.Furthermore, the invention provides a device for battery management of an electrical energy storage device of a vehicle, wherein the electrical energy storage is divided into at least two modules, which can be switched by a control unit, wherein the at least two modules of the electrical energy storage for charging and discharging in alternating order in a normal operation can be operated according to a predefinable control plan, wherein a specific module of the electrical energy storage for discharging in a capacitance determination mode is operable, based on measurement data emptying of the specific module an energy capacity of the particular module of the electrical energy storage can be determined by an integration method and from the total capacity of the electric Energy storage is derivable, with an adjustment of the predetermined control plan, a current state of charge of the electrical energy storage based on the determined Energieka capacity and the derived total capacity is calculable.
Die der Erfindung zugrunde liegende Idee liegt in der Bereitstellung eines weiteren Betriebsmodus des elektrischen Energiespeichers eines Fahrzeuges zur Bestimmung der Energiekapazität der Module und der Gesamtkapazität des elektrischen Energiespeichers in Abhängigkeit der zeitlichen Alterung und Abnahme der Energiekapazität. Unter Fahrzeug sollen dabei sowohl Hybrid- oder Elektrofahrzeuge, bei denen der elektrische Energiespeicher z. B. als Traktionsbatterie Verwendung findet, als auch herkömmliche Kraftfahrzeuge, bei denen der elektrische Energiespeicher z. B. zur Versorgung des Bordnetzes eingesetzt wird, verstanden werden. The idea underlying the invention lies in the provision of a further operating mode of the electrical energy storage device of a vehicle for determining the energy capacity of the modules and the total capacity of the electrical energy storage device as a function of the aging of time and decrease of the energy capacity. Under vehicle while both hybrid or electric vehicles, where the electrical energy storage z. B. is used as a traction battery, as well as conventional motor vehicles, in which the electrical energy storage z. B. is used to supply the electrical system to be understood.
In den Unteransprüchen finden sich vorteilhafte Weiterbildungen und Verbesserungen des jeweiligen Gegenstandes der Erfindung.In the dependent claims are advantageous developments and improvements of the respective subject of the invention.
Gemäß einer bevorzugten Ausführungsform des Verfahrens wird beim Laden eines bestimmten Moduls des elektrischen Energiespeichers in dem Kapazitätermittlungsmodus anhand von Messdaten einer Ladung des bestimmten Moduls die Energiekapazität des bestimmten Moduls des elektrischen Energiespeichers durch ein Integrationsverfahren ermittelt und daraus die Gesamtkapazität des elektrischen Energiespeichers erfasst.According to a preferred embodiment of the method, the energy capacity of the particular module of the electrical energy store is determined by an integration method when loading a specific module of the electrical energy storage in the capacitance determination mode based on measured data of a charge of the specific module and from the total capacity of the electrical energy store detected.
Gemäß einer weiteren Ausführungsform des Verfahrens werden bei dem Integrationsverfahren Stromsensoren zur Messung von Lade- und Entladeströmen der Module verwendet.According to a further embodiment of the method, the integration method uses current sensors for measuring charge and discharge currents of the modules.
Gemäß einer weiteren Ausführungsform des Verfahrens wird ein Ermitteln der Energiekapazität der Module durch den Kapazitätermittlungsmodus in bestimmten zeitlichen Abständen durchgeführt.According to a further embodiment of the method, a determination of the energy capacity of the modules is carried out by the capacity determination mode at specific time intervals.
Gemäß einer weiteren Ausführungsform des Verfahrens werden die bestimmten zeitlichen Abstände zwischen der Durchführung des Kapazitätermittlungsmodus anhand der bisherigen Belastung des elektrischen Energiespeichers errechnet.According to a further embodiment of the method, the specific time intervals between the performance of the capacity determination mode are calculated on the basis of the previous load of the electrical energy store.
Gemäß einer weiteren Ausführungsform des Verfahrens werden die Module als Module mit gleich großen Energiekapazitäten ausgeführt.According to a further embodiment of the method, the modules are designed as modules with equal energy capacities.
Gemäß einer weiteren Ausführungsform des Verfahrens wird bei Bedarf der Kapazitätermittlungsmodus durch den Normalbetrieb unterbrochen.According to a further embodiment of the method, the capacity determination mode is interrupted by the normal operation if required.
Die obigen Ausführungsformen und Weiterbildungen der Erfindung lassen sich auf beliebige und geeignete Art und Weise miteinander kombinieren.The above embodiments and further developments of the invention can be combined with each other in any suitable manner.
Im Folgenden werden Ausführungsformen der vorliegenden Erfindung anhand von Ausführungsbeispielen unter Bezugnahme auf die beiliegenden Figuren der Zeichnungen näher erläutert.Hereinafter, embodiments of the present invention will be explained in more detail by means of embodiments with reference to the accompanying figures of the drawings.
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In allen Figuren der Zeichnungen sind gleiche und funktionsgleiche Elemente – sofern nichts anderes angegeben ist – mit denselben Bezugszeichen versehen worden.In all figures of the drawings, the same and functionally identical elements - unless otherwise indicated - have been given the same reference numerals.
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Obgleich die vorliegende Erfindung vorstehend anhand der Ausführungsbeispiele beschrieben wurde, ist sie nicht darauf beschränkt, sondern auf vielfältige Art und Weise modifizierbar.Although the present invention has been described above with reference to the embodiments, it is not limited thereto, but modifiable in a variety of ways.
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- CN 200820239428 [0004] CN 200820239428 [0004]
- DE 102008058876 A1 [0005] DE 102008058876 A1 [0005]
- WO 2010/091170 A1 [0006] WO 2010/091170 A1 [0006]
Claims (8)
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DE102010060403A DE102010060403A1 (en) | 2010-11-08 | 2010-11-08 | Method for management of lithium battery utilized as traction battery in e.g. electric car, involves adapting control plan to total capacitance of energy storage, and determining actual state of charge of energy storage |
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DE102010060403A DE102010060403A1 (en) | 2010-11-08 | 2010-11-08 | Method for management of lithium battery utilized as traction battery in e.g. electric car, involves adapting control plan to total capacitance of energy storage, and determining actual state of charge of energy storage |
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DE102010060403A Pending DE102010060403A1 (en) | 2010-11-08 | 2010-11-08 | Method for management of lithium battery utilized as traction battery in e.g. electric car, involves adapting control plan to total capacitance of energy storage, and determining actual state of charge of energy storage |
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DE102008058876A1 (en) | 2007-11-29 | 2009-06-18 | GM Global Technology Operations, Inc., Detroit | Method and system for determining a state of charge of a battery |
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WO2010091170A1 (en) | 2009-02-05 | 2010-08-12 | Magna-Lastic Devices, Inc. | Battery state of charge sensor |
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2010
- 2010-11-08 DE DE102010060403A patent/DE102010060403A1/en active Pending
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US5543245A (en) * | 1993-03-15 | 1996-08-06 | Alcatel Converters | System and method for monitoring battery aging |
US5608325A (en) * | 1993-08-06 | 1997-03-04 | Thomson-Csf | Method of recalibrating a battery energy management processor |
US6404166B1 (en) * | 1997-01-21 | 2002-06-11 | Metrixx Limited | Signalling system |
EP0864877A1 (en) * | 1997-03-11 | 1998-09-16 | Siemens Aktiengesellschaft | Method and device for charging or discharging an accumulator of unknown construction and/or capacity used in an electrical or electronic device |
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DE102008058876A1 (en) | 2007-11-29 | 2009-06-18 | GM Global Technology Operations, Inc., Detroit | Method and system for determining a state of charge of a battery |
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