DE102009028977A1 - 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 - Google Patents

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 Download PDF

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Publication number
DE102009028977A1
DE102009028977A1 DE102009028977A DE102009028977A DE102009028977A1 DE 102009028977 A1 DE102009028977 A1 DE 102009028977A1 DE 102009028977 A DE102009028977 A DE 102009028977A DE 102009028977 A DE102009028977 A DE 102009028977A DE 102009028977 A1 DE102009028977 A1 DE 102009028977A1
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battery
direct current
converter
converters
battery system
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DE102009028977A
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German (de)
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Stefan Butzmann
Holger Fink
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Robert Bosch GmbH
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Robert Bosch GmbH
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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
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • 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
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0092—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption with use of redundant elements for safety purposes
    • 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
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/21—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having the same nominal voltage
    • 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
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/22—Balancing the charge of battery modules
    • 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
    • B60L2210/00—Converter types
    • B60L2210/10—DC to DC converters
    • 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
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/0077—Plural converter units whose outputs are connected in series
    • 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
    • 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
    • Y02T10/72—Electric energy management in electromobility
    • 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
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles

Abstract

The battery system has two direct current to direct current converters (2) and two battery modules (3). The battery module is attached at an input (4a) of the direct current to direct current converter. The both battery modules are electrically connected with each other by an electrical connection.

Description

Stand der TechnikState of the art

In Zukunft werden sowohl bei stationären Anwendungen, beispielsweise bei Windkraftanlagen, als auch in Fahrzeugen, beispielsweise in Hybrid- und Elektrofahrzeugen, vermehrt neue Batteriesysteme zum Einsatz kommen, die hohe Anforderungen bzgl. der Zuverlässigkeit erfüllen müssen. Diese hohen Anforderungen begründen sich damit, dass ein Ausfall des Batteriesystems zu einem Ausfall des Gesamtsystems führen kann (z. B. führt bei einem Elektrofahrzeug Ausfall einer Traktionsbatterie zu einem sog. „Liegenbleiber”) oder sogar zu einem sicherheitsrelevanten Problem führen kann (bei Windkraftanlagen werden beispielsweise Batteriesysteme eingesetzt, um bei starkem Wind die Anlage durch eine Rotorblattverstellung vor unzulässigen Betriebszuständen zu schützen).In the future, both in stationary applications, for example in wind turbines, as well as in vehicles, for example in hybrid and electric vehicles, increasingly new battery systems are used, which must meet high requirements in terms of reliability. These high requirements are due to the fact that a failure of the battery system can lead to a failure of the entire system (eg leads in an electric vehicle failure of a traction battery to a so-called. "Lying") or even lead to a safety-relevant problem (wind turbines For example, battery systems are used to protect the system from impermissible operating conditions in a strong wind by means of a rotor blade adjustment).

Um die für die jeweilige Anwendung notwendige Leistung und Energie zur Verfügung stellen zu können, weist das Batteriesystem in der Regel mehrere Batteriezellen auf. Diese Batteriezellen werden üblicherweise in Serie und teilweise zusätzlich auch parallel geschaltet.In order to provide the power and energy necessary for the particular application, the battery system generally has a plurality of battery cells. These battery cells are usually connected in series and in some cases in parallel.

Offenbarung der ErfindungDisclosure of the invention

Gegenstand der Erfindung ist ein Batteriesystem, das mindestens zwei DC/DC-Wandler und mindestens zwei Batteriemodule umfasst, wobei an jeweils einem ersten Eingang eines DC/DC-Wandlers ein Batteriemodul angeschlossen ist und wobei die mindestens zwei Batteriemodule über mindestens eine elektrische Verbindung miteinander elektrisch verbunden sind zwecks Ladungsausgleichs zwischen den mindestens zwei Batteriemodulen.The invention relates to a battery system comprising at least two DC / DC converters and at least two battery modules, wherein a battery module is connected to a first input of a DC / DC converter and wherein the at least two battery modules via at least one electrical connection with each other electrically are connected for the purpose of charge equalization between the at least two battery modules.

Ein DC/DC-Wandler, auch als Gleichstromsteller bezeichnet, ist ein selbstgeführter Stromrichter, der eine konstante Eingangsspannung in eine sich von der Eingangsspannung unterscheidende Ausgangsspannung umwandeln kann.A DC / DC converter, also referred to as a DC-DC converter, is a self-commutated power converter that can convert a constant input voltage into an output voltage different from the input voltage.

Unter einem „Batteriemodul” ist im Rahmen dieser Erfindung eine einzelne Batteriezelle oder eine Schaltung von mehreren Batteriezellen zu verstehen.A "battery module" in the context of this invention means a single battery cell or a circuit of several battery cells.

Die DC/DC-Wandler ermöglichen es, eingangsseitig eine Vielzahl von Batteriemodulen parallel und/oder in Reihe zu schalten. Die Klemmspannung der jeweiligen Batteriemodule ist auf diese Weise geringer als eine Schaltung von ohne DC/DC-Wandler unmittelbar in Serie geschalteten Batteriemodulen. Auf diese Weise kann erreicht werden, dass auf der Eingangsseite eines DC/DC-Wandlers keine Spannung anliegt, die einen besonderen Umgang mit dem Batteriemodul, beispielsweise beim Austausch des Batteriemoduls oder einzelner Batteriezellen des Batteriemoduls, erforderlich machen würde. Durch eine geeignete Schaltung der DC/DC-Wandler, insbesondere in Reihe und/oder parallel, kann auf der Ausgangsseite der DC/DC-Wandler eine gewünschte Ausgangsspannung beziehungsweise ein gewünschter Strom zur Verfügung gestellt werden. Die Vorrichtung ermöglicht außerdem die Wahl einer je nach Betriebssituation geeigneten Gesamtspannung, da die Ausgangsspannung der einzelnen DC/DC-Wandler nach bekannter Art eingestellt werden kann. Zusätzlich ist die Ausgangsspannung unabhängig von der Zahl der eingangsseitig angeschlossenen Batteriezellen der Batteriemodule. Dadurch kann die Auslegung des Batteriesystems rein nach Energie- und Leistungskriterien unabhängig von der für die jeweilige Anwendung geforderten Gesamtspannung erfolgen. Ein weiterer Vorteil besteht darin, dass teure Leistungsschalter zum Abschalten des Batteriesystems entfallen können, weil die Spannung auf der Ausgangsseite der DC/DC-Wandler durch Abschalten der DC/DC-Wandler erfolgen kann.The DC / DC converters make it possible to connect a plurality of battery modules in parallel and / or in series on the input side. The terminal voltage of the respective battery modules is thus lower than a circuit of directly connected in series without battery DC / DC converter modules. In this way it can be achieved that no voltage is applied to the input side of a DC / DC converter, which would require special handling of the battery module, for example when replacing the battery module or individual battery cells of the battery module. By a suitable circuit of the DC / DC converter, in particular in series and / or parallel, a desired output voltage or a desired current can be provided on the output side of the DC / DC converter. The device also makes it possible to choose a suitable overall voltage depending on the operating situation, since the output voltage of the individual DC / DC converters can be set in a known manner. In addition, the output voltage is independent of the number of battery cells connected on the input side of the battery modules. As a result, the design of the battery system can be carried out purely in accordance with energy and performance criteria independently of the total voltage required for the respective application. Another advantage is that expensive circuit breakers for switching off the battery system can be omitted, because the voltage can be done on the output side of the DC / DC converter by switching off the DC / DC converter.

Durch die mindestens eine elektrische Verbindung zwischen den mindestens zwei Batteriemodulen kann ein Ladungsausgleich zwischen den mindestens zwei Batteriemodulen stattfinden. Bei ungleicher Spannung zwischen den Batteriemodulen fließen Ausgleichsströme, die die Spannungen zwischen den Batteriemodulen aneinander angleichen. Bei gleicher Spannung aller Batteriemodule, das heißt, im ausgeglichenen Ladungszustand, fließen hingegen keine Ausgleichsströme. Die elektrische Verbindung kann daher im Falle eines Ladungsausgleiches bestehen bleiben.As a result of the at least one electrical connection between the at least two battery modules, charge equalization can take place between the at least two battery modules. With uneven voltage between the battery modules, equalizing currents flow, which equalize the voltages between the battery modules. At the same voltage of all battery modules, that is, in the balanced state of charge, however, no compensation currents flow. The electrical connection can therefore remain in the case of charge equalization.

Die elektrische Verbindung kann einen elektrischen Widerstand umfassen oder als Kurzschluss ausgebildet sein. Durch die Höhe des Widerstandes kann die Geschwindigkeit des Ladungsausgleiches gesteuert werden. Für einen möglichst schnellen Ladungsausgleich eignet sich die Ausbildung der elektrischen Verbindung als Kurzschluss. Ein elektrischer Widerstand kann vorgesehen sein, wenn hohe Kurzschlussströme problematisch sein könnten.The electrical connection may comprise an electrical resistance or be designed as a short circuit. The height of the resistor can be used to control the rate of charge compensation. For the fastest possible charge balance, the formation of the electrical connection is suitable as a short circuit. An electrical resistance may be provided if high short circuit currents could be problematic.

Weitere vorteilhafte Ausführungsformen der Erfindung sind Gegenstände der abhängigen Ansprüche.Further advantageous embodiments of the invention are subject matters of the dependent claims.

Die Erfindung wird im Folgenden anhand von Ausführungsformen, die durch Zeichnungen dargestellt sind, näher erläutert.The invention will be explained in more detail below with reference to embodiments which are illustrated by drawings.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Es zeigen:Show it:

1 eine schematische Darstellung einer ersten Ausführungsform eines erfindungsgemäßen Batteriesystems, 1 a schematic representation of a first embodiment of a battery system according to the invention,

2 eine schematische Darstellung einer zweiten Ausführungsform eines erfindungsgemäßen Batteriesystems, 2 a schematic representation of a second embodiment of a battery system according to the invention,

3 eine schematische Darstellung einer dritten Ausführungsform eines erfindungsgemäßen Batteriesystems, und 3 a schematic representation of a third embodiment of a battery system according to the invention, and

4 eine schematische Darstellung einer vierten Ausführungsform eines erfindungsgemäßen Batteriesystems. 4 a schematic representation of a fourth embodiment of a battery system according to the invention.

Ausführungsformen der ErfindungEmbodiments of the invention

Gleiche oder einander entsprechende Bauteile sind in den Figuren mit denselben Bezugszeichen versehen.The same or corresponding components are provided in the figures with the same reference numerals.

Die 1 zeigt in einer schematischen Darstellung einer ersten Ausführungsform eines erfindungsgemäßen Batteriesystems.The 1 shows a schematic representation of a first embodiment of a battery system according to the invention.

Das Batteriesystem gemäß der ersten Ausführungsform umfasst drei DC/DC-Wandler 2 und drei Batteriemodule 3. Jeweils ein DC/DC-Wandler 2 weist auf seiner Eingangsseite einen ersten Eingang 4a und einen zweiten Eingang 4b, auf seiner Ausgangsseite einen ersten Ausgang 5a und einen zweiten Ausgang 5b auf. Die ersten Eingänge 4a der DC/DC-Wandler 2 sind jeweils mit einem Batteriemodul 3 verbunden. Die zweiten Eingänge 4b der DC/DC-Wandler 2 sind mit einer Masse 8 verbunden. Auf der Ausgangsseite sind die DC/DC-Wandler in Reihe geschaltet, wobei der erste Ausgang 5a des einen außenliegenden DC/DC-Wandlers 2 und der zweite Ausgang 5b des anderen außen liegenden DC/DC-Wandlers 2 zum Spannungsabgriff dienen.The battery system according to the first embodiment includes three DC / DC converters 2 and three battery modules 3 , In each case a DC / DC converter 2 has a first entrance on its entrance side 4a and a second entrance 4b , on its output side, a first output 5a and a second exit 5b on. The first entrances 4a the DC / DC converter 2 each with a battery module 3 connected. The second inputs 4b the DC / DC converter 2 are with a crowd 8th connected. On the output side, the DC / DC converters are connected in series, with the first output 5a of an external DC / DC converter 2 and the second exit 5b the other external DC / DC converter 2 serve for voltage tap.

Die Batteriemodule 3 sind identisch aufgebaut. Jedes Batteriemodul 3 ist zum einen mit dem ersten Eingang eines DC/DC-Wandlers 2 und zum anderen mit einer Masse 8 verbunden.The battery modules 3 are identical. Every battery module 3 is on the one hand with the first input of a DC / DC converter 2 and on the other hand with a mass 8th connected.

Die drei Batteriemodule 3 sind über zwei galvanische Verbindungen 6a miteinander elektrisch verbunden. Aufgrund der Verbindungen 6a kann zwischen allen drei Batteriemodulen 3 ein Ladungsausgleich erfolgen. Dabei umfasst eine elektrische Verbindung 6a einen elektrischen Widerstand 1.The three battery modules 3 are via two galvanic connections 6a electrically connected to each other. Because of the connections 6a can be between all three battery modules 3 a charge balance done. In this case, an electrical connection comprises 6a an electrical resistance 1 ,

Jeweils ein Batteriemodul 3 umfasst mehrere Batteriezellen 7. Die Batteriezellen 7 sind in diesem Ausführungsbeispiel in Reihe geschaltet. Grundsätzlich ist es ebenfalls möglich, die Batteriezellen 7 zumindest teilweise parallel zu schalten.In each case a battery module 3 includes several battery cells 7 , The battery cells 7 are connected in series in this embodiment. Basically, it is also possible to use the battery cells 7 at least partially in parallel.

Die Batteriezellen 7 sind insbesondere wiederaufladbare Batteriezellen. Als Batteriezellen 7 eignen sich beispielsweise Lithium-Ionen-Zellen.The battery cells 7 are in particular rechargeable battery cells. As battery cells 7 For example, lithium-ion cells are suitable.

Die DC/DC-Wandler 2 können beispielsweise als Fly-Back-Konverter, Forward-Konverter, Push-Pull-Konverter, Half-Bridge-Konverter, Pull-Bridge-Konverter oder als Resonanzwandler ausgeführt sein.The DC / DC converter 2 For example, they may be implemented as fly-back converters, forward converters, push-pull converters, half-bridge converters, pull-bridge converters, or as resonant converters.

Die 2 zeigt in einer schematischen Darstellung eine zweite Ausführungsform eines erfindungsgemäßen Batteriesystems.The 2 shows a schematic representation of a second embodiment of a battery system according to the invention.

Im Gegensatz zur ersten Ausführungsform ist zwischen den einzelnen Batteriezellen 7 der Batteriemodule 3 eine elektrische Verbindung 6a mit einem Widerstand vorgesehen. Der Ladungsausgleich erfolgt in diesem Fall direkt zwischen den einzelnen Batteriezellen 7 der Batteriemodule 3. Ansonsten entspricht das Batteriesystem gemäß der zweiten Ausführungsform dem Batteriesystem der ersten Ausführungsform.In contrast to the first embodiment is between the individual battery cells 7 the battery modules 3 an electrical connection 6a provided with a resistor. The charge equalization takes place in this case directly between the individual battery cells 7 the battery modules 3 , Otherwise, the battery system according to the second embodiment corresponds to the battery system of the first embodiment.

Die 3 zeigt in einer schematischen Darstellung eine dritte Ausführungsform eines erfindungsgemäßen Batteriesystems.The 3 shows a schematic representation of a third embodiment of a battery system according to the invention.

Im Gegensatz zur ersten Ausführungsform ist die elektrische Verbindung 6b zwischen den Batteriemodulen 3 als Kurzschluss ausgebildet. Ansonsten entspricht die dritte Ausführungsform der ersten Ausführungsform.In contrast to the first embodiment, the electrical connection 6b between the battery modules 3 designed as a short circuit. Otherwise, the third embodiment corresponds to the first embodiment.

Die 4 zeigt in einer schematischen Darstellung eine vierte Ausführungsform eines erfindungsgemäßen Batteriesystems.The 4 shows a schematic representation of a fourth embodiment of a battery system according to the invention.

Im Gegensatz zur zweiten Ausführungsform sind die elektrischen Verbindungen 6b zwischen den einzelnen Batteriezellen verschiedener Batteriemodule 3 als Kurzschluss ausgebildet. Ansonsten entspricht die vierte Ausführungsform der zweiten Ausführungsform.In contrast to the second embodiment, the electrical connections 6b between the individual battery cells of different battery modules 3 designed as a short circuit. Otherwise, the fourth embodiment of the second embodiment.

In einer hier nicht gezeigten alternativen Ausführungsform können die DC/DC-Wandler zumindest teilweise parallel geschaltet sein.In an alternative embodiment not shown here, the DC / DC converters may be at least partially connected in parallel.

Derartige Batteriesysteme eignen sich beispielsweise als Teil einer Energieversorgung eines Kraftfahrzeuges, beispielsweise als Teil einer Energieversorgung für den Antrieb eines Elektromotors des Kraftfahrzeuges.Such battery systems are suitable, for example, as part of a power supply of a motor vehicle, for example as part of a power supply for driving an electric motor of the motor vehicle.

Claims (7)

Batteriesystem, umfassend mindestens zwei DC/DC-Wandler (2) und mindestens zwei Batteriemodule (3), wobei an jeweils einem ersten Eingang (4a) eines DC/DC-Wandlers (2) ein Batteriemodul (3) angeschlossen ist und wobei die mindestens zwei Batteriemodule (3) über mindestens eine elektrische Verbindung (6a, 6b) miteinander elektrisch verbunden sind zwecks Ladungsausgleichs zwischen den mindestens zwei Batteriemodulen (3).Battery system comprising at least two DC / DC converters ( 2 ) and at least two battery modules ( 3 ), each at a first input ( 4a ) of a DC / DC converter ( 2 ) a battery module ( 3 ) and wherein the at least two battery modules ( 3 ) via at least one electrical connection ( 6a . 6b ) are electrically connected to one another for the purpose of charge equalization between the at least two battery modules ( 3 ). Batteriesystem nach Anspruch 1, wobei ein Batteriemodul mindestens zwei Batteriezellen (7) umfasst, und mindestens zwei elektrische Verbindungen (6a, 6b) vorgesehen sind, wobei jeweils eine elektrische Verbindung (6a, 6b) eine Batteriezelle (7) des einen Batteriemoduls (3) mit einer Batteriezelle (7) des anderen Batteriemoduls (3) elektrisch verbindet.Battery system according to claim 1, wherein a battery module at least two battery cells ( 7 ), and at least two electrical connections ( 6a . 6b ) are provided, wherein in each case an electrical connection ( 6a . 6b ) a battery cell ( 7 ) of the one battery module ( 3 ) with a battery cell ( 7 ) of the other battery module ( 3 ) electrically connects. Batteriesystem nach Anspruch 2, wobei die mindestens zwei Batteriezellen (7) in Reihe geschaltet sind.Battery system according to claim 2, wherein the at least two battery cells ( 7 ) are connected in series. Batteriesystem nach einem der vorhergehenden Ansprüche, wobei die mindestens eine elektrische Verbindung (6a, 6b) einen elektrischen Widerstand (1) umfasst oder als Kurzschluss ausgebildet ist.Battery system according to one of the preceding claims, wherein the at least one electrical connection ( 6a . 6b ) an electrical resistance ( 1 ) or designed as a short circuit. Batteriesystem nach einem der vorhergehenden Ansprüche, wobei die mindestens zwei DC/DC-Wandler (2) ausgangsseitig in Reihe oder parallel geschaltet sind.Battery system according to one of the preceding claims, wherein the at least two DC / DC converters ( 2 ) are connected in series or in parallel on the output side. Batteriesystem nach einem der vorhergehenden Ansprüche, wobei die mindestens zwei DC/DC-Wandler (2) jeweils einen zweiten Eingang (4b) aufweisen, wobei der zweite Eingang (4b) mit Masse (8) verbunden ist.Battery system according to one of the preceding claims, wherein the at least two DC / DC converters ( 2 ) each have a second input ( 4b ), the second input ( 4b ) with mass ( 8th ) connected is. Batteriesystem nach einem der vorhergehenden Ansprüche, wobei die mindestens zwei DC/DC-Wandler (2) als Fly-Back-Konverter, Forward-Konverter, Push-Pull-Konverter, Half-Bridge-Konverter, Full-Bridge-Konverter oder als Resonanzwandler ausgeführt sind.Battery system according to one of the preceding claims, wherein the at least two DC / DC converters ( 2 ) are designed as a fly-back converter, forward converter, push-pull converter, half-bridge converter, full-bridge converter or as a resonant converter.
DE102009028977A 2009-08-28 2009-08-28 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 Pending DE102009028977A1 (en)

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DE102011116951A1 (en) * 2011-10-26 2013-05-02 Audi Ag Method for carrying out a charge compensation and associated battery
WO2013072362A1 (en) * 2011-11-17 2013-05-23 Commissariat à l'énergie atomique et aux énergies alternatives Dc voltage source including electrochemical cells having an adaptive voltage level
DE102012201404A1 (en) 2012-02-01 2013-08-01 Robert Bosch Gmbh Method and device for charge equalization of the battery cells of a battery
DE102012201602A1 (en) 2012-02-03 2013-08-08 Robert Bosch Gmbh Method for adjusting flowing current of strand of battery used in battery system mounted in vehicle, involves actuating two battery modules with different clock frequencies of direct current (DC)/DC transducer
DE102012201605A1 (en) 2012-02-03 2013-08-08 Robert Bosch Gmbh Method for adjusting total current of battery in vehicle, involves connecting battery strands to input of converter, and individually adjusting current flowing through strands by converter for adjusting total current of battery
DE102012005577A1 (en) 2012-03-20 2013-09-26 Daimler Ag High volt system i.e. high volt onboard network, for charging device of e.g. electrical motor car, has converter comprising converter output in voltage providing state of power source and electrically connected with terminal of source
DE102012204933A1 (en) 2012-03-28 2013-10-02 Robert Bosch Gmbh Battery system and method for driving battery modules of the battery system
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DE102011116951A1 (en) * 2011-10-26 2013-05-02 Audi Ag Method for carrying out a charge compensation and associated battery
US10214108B2 (en) 2011-11-17 2019-02-26 Commissariat à l'énergie atomique et aux énergies alternatives DC voltage source including electrochemical cells having an adaptive voltage level
WO2013072362A1 (en) * 2011-11-17 2013-05-23 Commissariat à l'énergie atomique et aux énergies alternatives Dc voltage source including electrochemical cells having an adaptive voltage level
FR2982997A1 (en) * 2011-11-17 2013-05-24 Commissariat Energie Atomique CONTINUOUS VOLTAGE SOURCE INCLUDING ADAPTIVE VOLTAGE LEVEL ELECTROCHEMICAL CELLS
DE102012201404A1 (en) 2012-02-01 2013-08-01 Robert Bosch Gmbh Method and device for charge equalization of the battery cells of a battery
WO2013113438A1 (en) 2012-02-01 2013-08-08 Robert Bosch Gmbh Charge equalization for cells of a battery
DE102012201602A1 (en) 2012-02-03 2013-08-08 Robert Bosch Gmbh Method for adjusting flowing current of strand of battery used in battery system mounted in vehicle, involves actuating two battery modules with different clock frequencies of direct current (DC)/DC transducer
DE102012201605A1 (en) 2012-02-03 2013-08-08 Robert Bosch Gmbh Method for adjusting total current of battery in vehicle, involves connecting battery strands to input of converter, and individually adjusting current flowing through strands by converter for adjusting total current of battery
DE102012201602B4 (en) 2012-02-03 2023-03-02 Robert Bosch Gmbh Method and control device for adjusting a current flowing through a battery string
DE102012005577A1 (en) 2012-03-20 2013-09-26 Daimler Ag High volt system i.e. high volt onboard network, for charging device of e.g. electrical motor car, has converter comprising converter output in voltage providing state of power source and electrically connected with terminal of source
DE102012204933A1 (en) 2012-03-28 2013-10-02 Robert Bosch Gmbh Battery system and method for driving battery modules of the battery system
WO2014023441A1 (en) 2012-03-28 2014-02-13 Robert Bosch Gmbh Battery with a plurality of battery strings connected in parallel and method for operating the battery
WO2013143810A2 (en) 2012-03-28 2013-10-03 Robert Bosch Gmbh Battery system and method for activating battery modules in the battery system
DE102012204931A1 (en) 2012-03-28 2013-10-02 Robert Bosch Gmbh Battery with a plurality of battery strings connected in parallel and method for operating the battery
DE102012208341A1 (en) 2012-05-18 2013-11-21 Robert Bosch Gmbh Lithium ion battery system for e.g. electric car, has battery modules comprising cells connected in series and provided with strands, and load-far ends of strands connected with each other, where modules are connected parallel to converter
DE102020113207A1 (en) 2020-05-15 2021-11-18 Audi Aktiengesellschaft Motor vehicle and method for charging an electrical traction energy storage device of a motor vehicle
US11745620B2 (en) 2020-05-15 2023-09-05 Audi Ag Motor vehicle and method for charging an electric traction energy storage of a motor vehicle

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