DE102009035482A1 - Battery i.e. lithium ion battery, has multiple battery cells clamped between two end plates to form cell stack, and unit provided for exposing pressure load to cell stack in stacking direction and designed as spring or active actuator - Google Patents
Battery i.e. lithium ion battery, has multiple battery cells clamped between two end plates to form cell stack, and unit provided for exposing pressure load to cell stack in stacking direction and designed as spring or active actuator Download PDFInfo
- Publication number
- DE102009035482A1 DE102009035482A1 DE102009035482A DE102009035482A DE102009035482A1 DE 102009035482 A1 DE102009035482 A1 DE 102009035482A1 DE 102009035482 A DE102009035482 A DE 102009035482A DE 102009035482 A DE102009035482 A DE 102009035482A DE 102009035482 A1 DE102009035482 A1 DE 102009035482A1
- Authority
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- Germany
- Prior art keywords
- battery
- cell stack
- end plates
- stacking direction
- designed
- 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.)
- Granted
Links
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 7
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 7
- 238000010276 construction Methods 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 abstract description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 239000013543 active substance Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
-
- 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
- H01M10/04—Construction or manufacture in general
- H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
-
- 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
- H01M10/04—Construction or manufacture in general
- H01M10/0481—Compression means other than compression means for stacks of electrodes and separators
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/42—Grouping of primary cells into 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
- 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
Abstract
Description
Die
Erfindung betrifft eine Batterie mit einer Vielzahl von Batterieeinzelzellen,
nach der im Oberbegriff von Anspruch 1 näher definierten Art.The
The invention relates to a battery having a plurality of battery cells,
according to the closer defined in the preamble of
Insbesondere bei Batterien in Lithium-Ionen-Technologie sind Batterieeinzelzellen in Flachbauweise bekannt und üblich. Diese Batterieeinzelzellen, welche beispielsweise als sogenannte Coffee-Bag-Zellen aufgebaut sein können, werden durch Druckkräfte beim Lade- und Entladevorgang in ihrem Volumen entsprechend geändert. Das heißt, dass die Zellen sich typischerweise in Stapelrichtung aufblähen beziehungsweise zusammenziehen. Dies wirkt sich nachteilig auf die Lebensdauer derartiger Batterieeinzelzellen aus.Especially Batteries in lithium-ion technology are single battery cells in flat design known and common. This single battery cells, which for example as so-called Coffee bag cells can be constructed by pressure forces Loading and unloading changed in volume accordingly. The is called, that the cells typically inflate in the stacking direction or contract. This adversely affects the life of such Single battery cells off.
Es ist daher die Aufgabe der hier vorliegenden Erfindung, eine Batterie zu schaffen, welche in der Lage ist, eine optimale Lebensdauer der Batterieeinzelzellen zu gewährleisten.It Therefore, the object of the present invention, a battery to create, which is able to have an optimal life of To ensure single battery cells.
Erfindungsgemäß wird diese
Aufgabe durch die im kennzeichnenden Teil von Anspruch 1 genannten
Merkmale gelöst.According to the invention this
Object by the mentioned in the characterizing part of
Durch die Mittel, welche den Zellenstapel in Stapelrichtung mit einer entsprechenden Druckkraft beaufschlagen kann erreicht werden, dass über die gesamte Lebensdauer der Batterieeinzelzellen eine optimale Einstellung des flächig ausgeübten Drucks gewährleistet wird. Damit lassen sich Volumenänderungseffekte beim Laden und Entladen weitestgehend vermeiden, so dass eine höhere Lebensdauer der Batterieeinzelzellen erzielt werden kann. Außerdem haben die Mittel zur Druckbeaufschlagung des Zellenstapels in Stapelrichtung den Vorteil, dass sie Bauteiltoleranzen der Batterieeinzelzellen entsprechend ausgleichen können, so dass die Anforderungen an die Herstellung der Einzelzellen entsprechend gesenkt und damit Kosten eingespart werden können.By the means which the stack of cells in the stacking direction with a appropriate pressure force can be achieved that over the entire Lifespan of battery cells an optimal setting of the flat exerted Ensured pressure becomes. This allows volume change effects To avoid as much as possible during loading and unloading, so that a longer service life of the Single battery cells can be achieved. In addition, the funds have to Pressurizing the cell stack in the stacking direction has the advantage that they component tolerances of the battery individual cells accordingly can balance so that the requirements for the production of individual cells accordingly lowered and thus costs can be saved.
In einer besonders günstigen Ausgestaltung der Erfindung sind die Mittel zur Druckbeaufschlagung des Zellenstapels dabei als Federmittel ausgeführt. Diese passiven Elemente sind einfach und effizient. Sie können beispielsweise zwischen eine der Endplatten und das Gehäuse eingebracht werden, und so den Zellenstapel insgesamt mit einem durch die konstruktive Wahl der Federn vorgegebenen Druck beaufschlagen. Dehnen sich die Zellen nun beim Ladevorgang entsprechend aus, so wirkt diese Volumenänderung gegen die Federkräfte, welche die Ausdehnung der Zellen unterbinden bzw. einschränken und einen konstanten Druck aufrechterhalten.In a particularly favorable Embodiment of the invention are the means for pressurizing the cell stack while running as a spring means. These passive elements are simple and efficient. For example, you can choose between one of the end plates and the housing be introduced, and so the cell stack in total with a pressurize given by the constructive choice of the springs pressure. The cells expand accordingly during the charging process, so affects this volume change against the spring forces, which prevent or restrict the expansion of the cells and maintain a constant pressure.
Neben dieser Ausgestaltung ist es selbstverständlich auch denkbar, die Federelemente zwischen beiden Endplatten und dem Gehäuse oder auch im Bereich des Zellenstapels zwischen zwei geeigneten Zwischenplatten anzuordnen. Außerdem ist es natürlich denkbar, mehrere derartige Anordnungen über den Stapel zu verteilen und/oder an den Enden des Stapels zu platzieren.Next Of course, this embodiment is also conceivable, the spring elements between both end plates and the housing or even in the area of To arrange cell stack between two suitable intermediate plates. Furthermore it is natural conceivable to distribute several such arrangements over the stack and / or to place at the ends of the stack.
Eine weitere vorteilhafte Ausgestaltung der Erfindung sieht vor, dass die Mittel zur Druckbeaufschlagung als aktive Aktuatoren ausgebildet sind. Hierfür kommen beispielsweise elektromechanische Wandler wie Piezosensoren oder auch entsprechende Stellmotoren, Linearmotoren oder dergleichen in Frage. Diese aktiven Mittel können dabei alleine in dem Zellenstapel angeordnet sein, oder sie können ergänzend oder zusätzlich zu den oben bereits beschriebenen passiven Mitteln Verwendung finden. Die aktiven Mittel haben den Vorteil, dass mit ihnen eine aktive Einstellung der Anpresskraft möglich ist. Diese kann beispielsweise in Abhängigkeit von Sensorsignalen für Druck und Temperatur anhand der typischerweise in einer Batterie ohnehin vorhandenen Elektronik angesteuert werden. Es wäre auch denkbar, entsprechende Kennfelder zu hinterlegen, beispielsweise ein Kennfeld der Lebensdauer in Abhängigkeit des Anpressdrucks. Über die elektronische Steuerung kann so jeweils ein geeigneter Anpressdruck eingestellt werden, um die optimalen Betriebsbedingungen und insbesondere die optimale Lebensdauer der Batterieeinzelzellen der Batterie zu realisieren.A Further advantageous embodiment of the invention provides that the means for pressurizing formed as active actuators are. Therefor For example, electromechanical converters such as piezo sensors come or corresponding servomotors, linear motors or the like in question. These active agents can be arranged alone in the cell stack, or they can be complementary or additionally to use the passive means already described above. The Active means have the advantage of having an active attitude with them the contact pressure possible is. This can, for example, in dependence on sensor signals for printing and temperature based on the typical in a battery anyway be driven to existing electronics. It would also be possible to appropriate Define maps, for example, a map of the lifetime dependent on the contact pressure. about The electronic control can thus each a suitable contact pressure be adjusted to the optimal operating conditions and in particular the optimal life of the battery cells of the battery too realize.
Insbesondere der Einsatz von Temperatursensoren ist besonders einfach, da derartige Temperatursensoren in Hochleistungsbatterien, wie beispielsweise Lithium-Ionen-Batterien, ohnehin vorhanden sind.Especially the use of temperature sensors is particularly simple because such Temperature sensors in high-performance batteries, such as Lithium-ion batteries, are available anyway.
Der Aufbau mit den aktiven Mitteln kann dabei so ausgebildet sein, dass diese nur dann angesteuert werden, wenn die Batterieeinzelzellen sich durch Lade- oder Entladevorgänge entsprechend verändern. Die benötigte elektrische Leistung kann dabei von der Batterie selbst bereitgestellt werden, da diese sehr gering ist. In den Betriebszyklen, in denen keine Ladung oder Entladung der Batterie erfolgt, können die Aktuatoren abgeschaltet werden und verbrauchen in diesem Standby-Betrieb dann keine elektrische Leistung. Insbesondere in der Kombination von aktiven und passiven Mitteln kann so ein sehr effizienter Aufbau der Batterie bereitgestellt werden, welcher mit sehr wenig zusätzlicher Leistung eine deutliche Erhöhung der Lebensdauer ermöglicht.Of the Structure with the active means can be designed so that These are only activated when the battery cells to change accordingly by loading or unloading operations. The needed Electric power can be provided by the battery itself because it is very small. In the operating cycles in which No charge or discharge of the battery, the Actuators are turned off and consume in this standby mode then no electrical power. Especially in combination of active and passive means can be such a very efficient construction the battery can be provided, which with very little additional Performance a significant increase the lifetime allows.
Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den restlichen Unteransprüchen und werden anhand des Ausführungsbeispiels deutlich, welches nachfolgend auf Basis der Figuren näher erläutert wird.Further advantageous embodiments of the invention will become apparent from the remaining dependent claims and are based on the embodiment clearly, which will be explained in more detail below based on the figures.
Dabei zeigen:there demonstrate:
In
In
In
der Darstellung der
In
In
In
der Darstellung der
Selbstverständlich sind
auch andere Varianten und Aktuatoren entsprechend denkbar, ebenso wie
die Kombination von aktiven und passiven Mitteln. Der Aufbau mit
Federelementen und Druckplatte kann dabei an einem oder beiden Enden
des Zellenstapels ebenso angeordnet werden, wie beispielsweise auch
in der Mitte des Zellenstapels. Selbstverständlich wäre es auch denkbar, verschiedene
Aufbauten zu realisieren, bei denen beispielsweise auf der einen
Seite mit aktiven Mitteln und auf der anderen Seite mit passiven
Mitteln gearbeitet wird. Alternativ hierzu wäre es auch denkbar, auf beiden
Seiten des Zellenstapels
Der Aufbau ist besonders vorteilhaft bei Lithium-Ionen-Batterien, wie sie beispielsweise für hybridisierte oder teilhybridisierte Antriebsstränge in Fahrzeugen, sogenannten Hybridantrieben oder Mildhybridantrieben, eingesetzt werden.Of the Construction is particularly advantageous with lithium-ion batteries, such as for example for hybridized or partially hybridized powertrains in vehicles, so-called Hybrid drives or Mildhybridantrieben be used.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE102009035482.4A DE102009035482B4 (en) | 2009-07-31 | 2009-07-31 | Battery with a large number of individual battery cells |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009035482.4A DE102009035482B4 (en) | 2009-07-31 | 2009-07-31 | Battery with a large number of individual battery cells |
Publications (2)
Publication Number | Publication Date |
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DE102009035482A1 true DE102009035482A1 (en) | 2011-02-03 |
DE102009035482B4 DE102009035482B4 (en) | 2023-11-16 |
Family
ID=43402619
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DE102009035482.4A Active DE102009035482B4 (en) | 2009-07-31 | 2009-07-31 | Battery with a large number of individual battery cells |
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Cited By (22)
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DE102011076575A1 (en) * | 2011-05-27 | 2012-11-29 | Bmw Ag | Energy storage module of several, in particular prismatic memory cells and method for producing an energy storage module and method for producing an end plate for an energy storage module |
WO2013063403A1 (en) * | 2011-10-28 | 2013-05-02 | Nucleus Scientific, Inc. | A multi-cell battery assembly |
DE102013201351A1 (en) | 2013-01-29 | 2014-07-31 | Robert Bosch Gmbh | Device for aligning e.g. lithium ion batteries of module for e.g. laptop, has stamper applying pressure to batteries and extended along first direction, pressing batteries on support along direction vertical to first and second directions |
CN104638310A (en) * | 2013-11-08 | 2015-05-20 | 丰田自动车株式会社 | Charging system for all-solid-state battery |
DE102014207950A1 (en) | 2014-04-28 | 2015-10-29 | Bayerische Motoren Werke Aktiengesellschaft | Battery and method of manufacturing a battery |
US9306252B2 (en) * | 2012-06-11 | 2016-04-05 | Nucleus Scientific, Inc. | Dynamic pressure control in a battery assembly |
DE102014225367A1 (en) * | 2014-12-10 | 2016-06-16 | Robert Bosch Gmbh | Battery and method of manufacturing a battery |
US9882177B2 (en) | 2011-05-27 | 2018-01-30 | Bayerische Motoren Werke Aktiengesellschaft | Energy storage module comprising a plurality of prismatic storage cells and method for production thereof |
CN107894312A (en) * | 2017-12-25 | 2018-04-10 | 河北工业大学 | A kind of cylinder type lithium battery pressure continuously adjusts fixed protection mechanism |
US10056657B2 (en) | 2011-05-27 | 2018-08-21 | Bayerische Motoren Werke Aktiengesellschaft | Energy storage module comprising a plurality of prismatic storage cells |
EP3389115A1 (en) * | 2017-04-12 | 2018-10-17 | VW-VM Forschungsgesellschaft mbH & Co. KG | Modular battery with improved safety characteristics |
DE102018103305A1 (en) * | 2018-02-14 | 2019-08-14 | Volkswagen Aktiengesellschaft | Battery module with at least one cell and method for operating a battery module |
DE102018205896A1 (en) * | 2018-04-18 | 2019-10-24 | Volkswagen Aktiengesellschaft | "Battery module and battery arrangement" |
WO2021008952A1 (en) | 2019-07-15 | 2021-01-21 | Daimler Ag | Battery for an at least partially electrically operable motor vehicle, having at least one flexible clamping device supported on a motor vehicle component, and motor vehicle |
WO2021078509A1 (en) | 2019-10-23 | 2021-04-29 | Daimler Ag | Electrical energy store and method for operating an electrical energy store |
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CN113557633A (en) * | 2019-11-29 | 2021-10-26 | 松下知识产权经营株式会社 | Battery with a battery cell |
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