DE102012204931A1 - Battery with a plurality of battery strings connected in parallel and method for operating the battery - Google Patents
Battery with a plurality of battery strings connected in parallel and method for operating the battery Download PDFInfo
- Publication number
- DE102012204931A1 DE102012204931A1 DE102012204931A DE102012204931A DE102012204931A1 DE 102012204931 A1 DE102012204931 A1 DE 102012204931A1 DE 102012204931 A DE102012204931 A DE 102012204931A DE 102012204931 A DE102012204931 A DE 102012204931A DE 102012204931 A1 DE102012204931 A1 DE 102012204931A1
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- Germany
- Prior art keywords
- battery
- converter
- parallel
- strings
- cells
- 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.)
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Classifications
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- 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
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- 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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/64—Constructional details of batteries specially adapted for electric vehicles
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- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Dc-Dc Converters (AREA)
Abstract
Es wird eine Batterie mit einer Mehrzahl von parallel geschalteten Batteriesträngen (21) offenbart, von denen jeder mindestens eine Batteriezelle (13) aufweist. Die Batterie weist eine Schaltung auf, über die die Batteriezellen (13) der Batterie geladen werden können, wenn eine Ladespannung an den Anschlüssen (14, 15) der Batterie bereitgestellt wird. An jedem der parallel geschalteten Batteriestränge (21) ist mindestens eine bezüglich einer Entladestromrichtung der Batterie in Durchlassrichtung geschaltete Diode (31) angeordnet.A battery is disclosed with a plurality of battery strings (21) connected in parallel, each having at least one battery cell (13). The battery has a circuit through which the battery cells (13) of the battery can be charged when a charging voltage is provided to the terminals (14, 15) of the battery. At each of the battery strings (21) connected in parallel, at least one diode (31) connected in the forward direction with respect to a discharge current direction of the battery is arranged.
Description
Die vorliegende Erfindung betrifft Batterie, die eine Mehrzahl von parallel geschalteten Batteriesträngen und eine Schaltung, über die die Batteriezellen der Batterie geladen werden können, aufweist. Außerdem betrifft die Erfindung ein Verfahren zum Betreiben der Batterie und ein Kraftfahrzeug, das mit der Batterie ausgestattet ist.The present invention relates to a battery having a plurality of battery strings connected in parallel and a circuit through which the battery cells of the battery can be charged. Moreover, the invention relates to a method for operating the battery and a motor vehicle that is equipped with the battery.
Stand der TechnikState of the art
In stationären Energiespeichern wird typischerweise eine große Anzahl von Batteriezellen benötigt. Dabei werden für eine Batterie mit mehreren MWh Energieinhalt beispielsweise mehrere Tausend Batteriezellen miteinander verschaltet, wobei die Anzahl der Zellen mit kleiner werdender Zellenkapazität ansteigt. Ferner ist es für Anwendungen, die einen großen Energiespeicher erfordern, häufig insbesondere auch erforderlich, mehr Zellen als zur Erreichung der geforderten Ausgangsspannung eigentlich notwendig sind, zu verbauen. Die Batteriezellen können seriell und/oder parallel verschaltet sein, wobei oft eine Kombination aus einer Reihenschaltung und einer Parallelschaltung angewendet wird. Typischerweise weisen die Konfigurationen entweder mehrere parallel verschaltete Batteriezellen oder mehrere parallele Batteriestränge auf.Stationary energy stores typically require a large number of battery cells. In this case, for example, several thousand battery cells are interconnected for a battery with several MWh of energy content, with the number of cells increasing with decreasing cell capacity. Furthermore, for applications which require a large energy storage, it is often necessary in particular also to install more cells than are actually necessary for achieving the required output voltage. The battery cells can be connected in series and / or in parallel, often using a combination of a series connection and a parallel connection. Typically, the configurations either comprise a plurality of parallel connected battery cells or multiple parallel battery strings.
So findet man bei der Verwendung vieler Zellen meist eine der in den
Nachteilig an den bekannten Topologien ist jedoch, dass die einzelnen Batteriezellen oder Batteriemodule, wenn ein Verbraucher angeschlossen wird, aufgrund der Toleranzen des Innenwiderstandes unterschiedlich stark belastet und damit unterschiedlich stark entladen werden. Bei einer Änderung der Belastung entstehen somit unerwünschte Ausgleichsströme zwischen den Zellen. Dadurch ergeben sich Verluste und die Lebensdauer der Zellen verringert sich. A disadvantage of the known topologies, however, is that the individual battery cells or battery modules, when a consumer is connected, loaded differently due to the tolerances of the internal resistance and thus different levels of discharge. When the load is changed, unwanted equalization currents thus arise between the cells. This results in losses and the life of the cells is reduced.
Da sich ferner die Batteriezellen eines Batteriesystems oder einer Batterie über die Lebensdauer des Batteriesystems oder der Batterie im Allgemeinen unterschiedlich verhalten, kommt es bei solchen, wie oben beschriebenen insbesondere älteren Batterien oder Batteriesystemen zu Ausgleichsströmen zwischen den einzelnen Batteriesträngen oder Batteriemodulen, die noch zusätzliche Verluste erzeugen und darüber hinaus die Batteriezellenalterung noch zusätzlich beschleunigen.Further, since the battery cells of a battery system or a battery generally behave differently over the life of the battery system or battery, such as described above, especially older batteries or battery systems, there will be equalization currents between the individual battery strings or battery modules, which will generate additional losses and additionally accelerate battery cell aging.
Aus dem Dokument
Offenbarung der ErfindungDisclosure of the invention
Erfindungsgemäß wird eine spezielle Batterie mit einer Mehrzahl von parallel geschalteten Batteriesträngen, von denen jeder mindestens eine Batteriezelle aufweist, geschaffen. Die Batterie weist eine Schaltung auf, über die die Batteriezellen der Batterie geladen werden können, wenn eine Ladespannung an den Anschlüssen der Batterie bereitgestellt wird. Ferner ist in jedem der parallel geschalteten Batteriestränge mindestens eine bezüglich einer Entladestromrichtung der Batterie in Durchlassrichtung geschaltete Diode angeordnet. According to the invention, a special battery is provided with a plurality of battery strings connected in parallel, each of which has at least one battery cell. The battery has a circuit through which the battery cells of the battery can be charged when a charging voltage is provided to the terminals of the battery. Furthermore, in each of the parallel-connected battery strings, at least one diode connected in the forward direction with respect to a discharge current direction of the battery is arranged.
Ferner wird ein dazugehöriges Verfahren zum Betreiben der Batterie zur Verfügung gestellt.Furthermore, an associated method for operating the battery is provided.
Vorteile der ErfindungAdvantages of the invention
Ein Vorteil der Erfindung ist, dass auf eine einfache und günstige Weise eine Entkopplung der Batteriestränge voneinander erreicht wird. So werden unerwünschte Ausgleichsströme verhindert. Denn wegen der Sperrwirkung der Dioden in Rückwärtsrichtung fließt kein Strom in die Zellen hinein. Es werden die in Serie geschalteten Batteriezellen über die erfindungsgemäßen Dioden mit einer Last verbunden, so dass über die Dioden die Energie den einzelnen Strängen entkoppelt voneinander entnommen wird. An advantage of the invention is that decoupling of the battery strings from one another is achieved in a simple and favorable manner. This prevents unwanted equalizing currents. Because of the blocking effect of the diodes in the reverse direction, no current flows into the cells. The series-connected battery cells are connected via the diodes according to the invention with a load, so that the energy is taken from the individual strands decoupled from each other via the diodes.
Gemäß einer Weiterbildung der Erfindung weist die Batterie mindestens einen DC/DC-Wandler auf, über den Batteriezellen geladen werden können. According to one embodiment of the invention, the battery has at least one DC / DC converter, via which battery cells can be charged.
Damit wird eine besonders vorteilhafte und flexible Möglichkeit zum Laden der Batteriezellen der erfindungsgemäßen Batterie bereitgestellt. This provides a particularly advantageous and flexible possibility for charging the battery cells of the battery according to the invention.
Bevorzugt wird der mindestens eine DC/DC-Wandler eingangsseitig mit den Eingangsterminals der Batterie parallel geschaltet. Dabei können ein Eingang des DC/DC-Wandlers und ein Ausgang des DC/DC-Wandlers miteinander verbunden sein. Preferably, the at least one DC / DC converter is connected in parallel with the input terminals of the battery on the input side. In this case, an input of the DC / DC converter and an output of the DC / DC converter can be connected to one another.
Gemäß einer Ausführungsform ist ferner ein Ausgang des DC/DC-Wandlers mit der Anode von mindestens einer der Dioden gekoppelt. Die Dioden der DC/DC-Wandler können mit einem positiven Terminal der Batterie verbunden sein. According to one embodiment, an output of the DC / DC converter is further coupled to the anode of at least one of the diodes. The diodes of the DC / DC converters may be connected to a positive terminal of the battery.
Ferner kann der DC/DC-Wandler als Abwärtswandler oder als Aufwärtswandler ausgebildet sein.Furthermore, the DC / DC converter can be designed as a down converter or as a step-up converter.
Gemäß einer besonders bevorzugten Ausführungsform der Erfindung weist die Batterie eine Mehrzahl der erfindungsgemäßen DC/DC-Wandler auf, die eingangsseitig parallel geschaltet sind. So kann beispielsweise pro Batteriestrang ein DC/DC-Wandler vorgesehen sein.According to a particularly preferred embodiment of the invention, the battery has a plurality of DC / DC converters according to the invention, which are connected in parallel on the input side. Thus, for example, one DC / DC converter can be provided per battery string.
Die Erfindung kann vorteilhaft insbesondere bei einer Batterie angewandt werden, die eine Reihenschaltung von Batteriemodulen aufweist, von denen mindestens eine Parallelschaltung aus Batteriesträngen oder Batteriezellen besteht. The invention can advantageously be applied in particular to a battery which has a series connection of battery modules, of which at least one parallel circuit consists of battery strings or battery cells.
Erfindungsgemäß kann das Batteriesystem eine Lithium-Ionen-Batterie aufweisen. According to the invention, the battery system may comprise a lithium-ion battery.
Gemäß noch einem Aspekt der Erfindung wird außerdem ein Kraftfahrzeug bereitgestellt, das die erfindungsgemäße Batterie aufweist, die in einem Antriebsstrang des Kraftfahrzeugs angeordnet ist.In accordance with yet another aspect of the invention, there is also provided a motor vehicle having the battery of the invention disposed in a drive train of the motor vehicle.
Die Erfindung ist aber auch insbesondere bei stationären Energiespeichereinrichtungen vorteilhaft einsetzbar.However, the invention can also be used advantageously in particular in stationary energy storage devices.
Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben und in der Beschreibung beschrieben.Advantageous developments of the invention are specified in the subclaims and described in the description.
Zeichnungendrawings
Ausführungsbeispiele der Erfindung werden anhand der Zeichnungen und der nachfolgenden Beschreibung näher erläutert. Es zeigen:Embodiments of the invention will be explained in more detail with reference to the drawings and the description below. Show it:
In der
In der
In der
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
- DE 102009028977 A1 [0006] DE 102009028977 A1 [0006]
Claims (10)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012204931A DE102012204931A1 (en) | 2012-03-28 | 2012-03-28 | Battery with a plurality of battery strings connected in parallel and method for operating the battery |
PCT/EP2013/055393 WO2014023441A1 (en) | 2012-03-28 | 2013-03-15 | Battery with a plurality of battery strings connected in parallel and method for operating the battery |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012204931A DE102012204931A1 (en) | 2012-03-28 | 2012-03-28 | Battery with a plurality of battery strings connected in parallel and method for operating the battery |
Publications (1)
Publication Number | Publication Date |
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DE102012204931A1 true DE102012204931A1 (en) | 2013-10-02 |
Family
ID=47901982
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102012204931A Withdrawn DE102012204931A1 (en) | 2012-03-28 | 2012-03-28 | Battery with a plurality of battery strings connected in parallel and method for operating the battery |
Country Status (2)
Country | Link |
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DE (1) | DE102012204931A1 (en) |
WO (1) | WO2014023441A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117154860A (en) * | 2022-05-24 | 2023-12-01 | 武汉路特斯汽车有限公司 | Power supply circuit, vehicle-mounted power supply system and vehicle |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000021178A1 (en) * | 1998-10-03 | 2000-04-13 | The University Of Bristol | A power management system |
DE102009035448A1 (en) * | 2009-04-03 | 2011-01-05 | Conti Temic Microelectronic Gmbh | Arrangement for parallel connection of batteries for current supply to motor generator, comprises change over switch having multiple diodes, where motor generator has two circuit points, where change over switch has switching contact |
DE102009028977A1 (en) | 2009-08-28 | 2011-03-03 | Robert Bosch Gmbh | Battery system for vehicle, has two direct current to direct current converters and two battery modules, where battery module is attached at input of direct current to direct current converter |
DE102009046501A1 (en) * | 2009-11-06 | 2011-05-12 | SB LiMotive Company Ltd., Suwon | Battery system with DC / DC converters |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3286152A (en) * | 1963-10-10 | 1966-11-15 | John B Noe | Multiple battery charging and discharging circuit means |
FR2514963A1 (en) * | 1981-10-20 | 1983-04-22 | Accumulateurs Fixes | DEVICE FOR CHARGING A BATTERY ASSEMBLY, IN PARTICULAR BUFFER BATTERIES SUPPLIED BY A LIMITED POWER ENERGY SOURCE |
DE69430855T2 (en) * | 1993-01-29 | 2002-12-19 | Canon Kk | Electrical energy storage device and electrical power system |
EP0736828A3 (en) * | 1995-04-06 | 1997-11-12 | Seiko Epson Corporation | Battery driven electronic apparatus and method of controlling power supply in the apparatus |
US6369462B1 (en) * | 2001-05-02 | 2002-04-09 | The Aerospace Corporation | Maximum power tracking solar power system |
JP4503636B2 (en) * | 2007-08-28 | 2010-07-14 | レノボ・シンガポール・プライベート・リミテッド | Battery pack and charging method |
JP4305553B2 (en) * | 2007-10-23 | 2009-07-29 | トヨタ自動車株式会社 | Electric vehicle |
WO2009128079A1 (en) * | 2008-04-17 | 2009-10-22 | Eran Ofek | Method and apparatus of performance balancing of battery cells |
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2012
- 2012-03-28 DE DE102012204931A patent/DE102012204931A1/en not_active Withdrawn
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2013
- 2013-03-15 WO PCT/EP2013/055393 patent/WO2014023441A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000021178A1 (en) * | 1998-10-03 | 2000-04-13 | The University Of Bristol | A power management system |
DE102009035448A1 (en) * | 2009-04-03 | 2011-01-05 | Conti Temic Microelectronic Gmbh | Arrangement for parallel connection of batteries for current supply to motor generator, comprises change over switch having multiple diodes, where motor generator has two circuit points, where change over switch has switching contact |
DE102009028977A1 (en) | 2009-08-28 | 2011-03-03 | Robert Bosch Gmbh | Battery system for vehicle, has two direct current to direct current converters and two battery modules, where battery module is attached at input of direct current to direct current converter |
DE102009046501A1 (en) * | 2009-11-06 | 2011-05-12 | SB LiMotive Company Ltd., Suwon | Battery system with DC / DC converters |
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Publication number | Publication date |
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WO2014023441A1 (en) | 2014-02-13 |
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R005 | Application deemed withdrawn due to failure to request examination |