DE102021130446A1 - Traction battery, its use and motor vehicle with such a battery - Google Patents
Traction battery, its use and motor vehicle with such a battery Download PDFInfo
- Publication number
- DE102021130446A1 DE102021130446A1 DE102021130446.6A DE102021130446A DE102021130446A1 DE 102021130446 A1 DE102021130446 A1 DE 102021130446A1 DE 102021130446 A DE102021130446 A DE 102021130446A DE 102021130446 A1 DE102021130446 A1 DE 102021130446A1
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- Germany
- Prior art keywords
- battery
- traction battery
- cooling elements
- traction
- battery cells
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/647—Prismatic or flat cells, e.g. pouch cells
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
- H01M10/6555—Rods or plates arranged between the cells
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
- H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the cells
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Die Erfindung stellt ein Traktionsbatterie für ein Kraftfahrzeug mit den folgenden Merkmalen bereit: Die Traktionsbatterie (10) umfasst Batteriezellen (11) mit jeweils sechs Seiten; und die Traktionsbatterie (10) ist dazu eingerichtet, die Batteriezellen (11) jeweils von fünf der sechs Seiten zu kühlen.The invention provides a traction battery for a motor vehicle with the following features: The traction battery (10) comprises battery cells (11), each with six sides; and the traction battery (10) is set up to cool the battery cells (11) from five of the six sides.
Description
Die vorliegende Erfindung betrifft ein Traktionsbatterie für ein Kraftfahrzeug. Die vorliegende Erfindung betrifft darüber hinaus deren Verwendung und ein entsprechendes Kraftfahrzeug.The present invention relates to a traction battery for a motor vehicle. The present invention also relates to their use and a corresponding motor vehicle.
Als Antriebsbatterie, Hochvoltspeicher, Traktionsbatterie oder Zyklenbatterie wird in der Antriebstechnik jedweder mobile elektrische Energiespeicher verstanden, der zum Antrieb von Elektrofahrzeugen dient und die Elektromotoren von Elektrofahrzeugen mit Energie versorgt. Traktionsbatterien nach dem Stand der Technik bestehen aus bis zu mehreren tausend parallel und seriell verschalteten Batteriezellen.In drive technology, a drive battery, high-voltage battery, traction battery or cycle battery is any mobile electrical energy storage device that is used to drive electric vehicles and supplies the electric motors of electric vehicles with energy. State-of-the-art traction batteries consist of up to several thousand battery cells connected in parallel and in series.
Bei Elektroautos sind für den elektrischen Antriebsstrang 400-Volt-Systeme vorherrschend; vereinzelt werden 800-V-Architekturen bei gehobenen oder sportlichen Fahrzeugen wie dem Porsche Taycan oder Audi e-tron GT eingesetzt. Um die bei derlei hohen Spannungen durch Ladeverluste entstehende Verlustwärme aus dem Fahrzeug abzuführen, ist ein Kühlsystem erforderlich.In electric cars, 400-volt systems are predominant for the electric drive train; 800 V architectures are occasionally used in upscale or sporty vehicles such as the Porsche Taycan or Audi e-tron GT. A cooling system is required to dissipate the heat loss from the vehicle due to charging losses at such high voltages.
Bei der direkten Kühlung der Batterie, insbesondere der Ölkühlung, entspricht es dem Stand der Technik, jede Zelle auf zwei links- und rechtsseitig zugänglichen Flächen und zusätzlich an Ober- und Unterseite, also von insgesamt vier Seiten zu kühlen.With the direct cooling of the battery, in particular the oil cooling, it corresponds to the state of the art to cool each cell on two surfaces accessible on the left and right and additionally on the top and bottom, i.e. from a total of four sides.
Die Erfindung stellt ein Traktionsbatterie für ein Kraftfahrzeug, ein Verfahren zu deren Verwendung und ein entsprechendes Kraftfahrzeug gemäß den unabhängigen Ansprüchen bereit.The invention provides a traction battery for a motor vehicle, a method for its use and a corresponding motor vehicle according to the independent claims.
Der vorgeschlagene Ansatz trägt dem Umstand Rechnung, dass die zusätzliche Kühlung mehrerer Zellen an Vorder- und Rückseite die Anbringung von Kühlelementen an sechs Seiten jeder Batteriezelle und somit einen vergleichsweise komplexen Aufbau bedingt.
Die Erfindung fußt daher auf dem Grundgedanken, die Kühlung auf einer Seite der Batteriezelle entfallen zu lassen, sodass bei der Aneinanderreihung mehrerer prismatischer und insbesondere quaderförmiger Batteriezellen nicht zwischen jedem Paar benachbarter Zellen ein Kühlelement integriert zu werden braucht.The invention is therefore based on the basic idea of eliminating the cooling on one side of the battery cell, so that when several prismatic and in particular cuboid battery cells are lined up in a row, a cooling element does not have to be integrated between each pair of adjacent cells.
Ein Vorzug dieser Lösung liegt im vereinfachten Aufbau der resultierenden Batterie.An advantage of this solution lies in the simplified structure of the resulting battery.
Weitere Ausgestaltungen der Erfindung sind in den abhängigen Patentansprüchen angegeben. So kann sie vorteilhaft im Rahmen eines Zellstapels (stack) eingesetzt werden, dessen Materialeinsatzkosten (MEK) sie durch den Wegfall der Hälfte der zwischen den Zellen angeordneten Kühlelementen senkt.Further developments of the invention are specified in the dependent patent claims. It can thus be used advantageously in the context of a cell stack (stack) whose material usage costs (MEK) are reduced by eliminating half of the cooling elements arranged between the cells.
Ferner kann eine erfindungsgemäße Traktionsbatterie neben den besagten Kühlelementen zum Kühlen der Batteriezellen auch getrennt von den Kühlelementen ausgebildete Druckkissen (compression pads) zur Polsterung der Zellen innerhalb des Gehäuses umfassen. Diese Funktionstrennung verleiht den Elementen einen - im Vergleich zu einer integrierten Ausführung - einfachen Aufbau.In addition to the said cooling elements for cooling the battery cells, a traction battery according to the invention can also include pressure pads (compression pads) formed separately from the cooling elements for cushioning the cells within the housing. This separation of functions gives the elements a simple structure compared to an integrated design.
Vorzüge bietet die Verwendung der vorgeschlagenen Konstruktion schließlich im Rahmen einer Öl- oder anderweitigen Flüssigkeitskühlung. Dickere Kühlelemente setzen dem Kühlmittel hier einen geringeren Strömungswiderstand entgegen. Der auf diesem Wege erhöhte Volumenstrom des Kühlmittels gleicht zumindest teilweise etwaige Nachteile aus, die sich für das Thermomanagement einer Zelle durch den Verzicht auf die Kühlung von einer ihrer Seiten ergeben mögen.Finally, the use of the proposed design offers advantages in the context of oil or other liquid cooling. Thicker cooling elements offer less flow resistance to the coolant. The volume flow of the coolant that is increased in this way at least partially compensates for any disadvantages that may arise for the thermal management of a cell by not cooling one of its sides.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im Folgenden näher beschrieben.
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1 zeigt eine quaderförmige Lithium-Ionen-Batteriezelle nach dem Stand der Technik. -
2 zeigt eine erste Variante der Erfindung. -
3 zeigt eine zweite Variante der Erfindung. -
4 zeigt den sich ergebenden Druckverlust von Öl bei einer Temperatur von 35 °C. -
5 zeigt den sich ergebenden thermischen Widerstand ölgekühlter Batteriemodule.
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1 shows a cuboid lithium-ion battery cell according to the prior art. -
2 shows a first variant of the invention. -
3 shows a second variant of the invention. -
4 shows the resulting pressure loss of oil at a temperature of 35 °C. -
5 shows the resulting thermal resistance of oil-cooled battery modules.
Die zur Kühlung der Batteriezellen (11) vorgesehenen Kühlelemente (12) sind - hier wie im Folgenden - aus Gründen der Übersichtlichkeit nicht auf sämtlichen Seiten (1-6) jeder Batteriezelle (11) dargestellt; vielmehr werden deren gekühlte Flächen abbildungsgemäß durch das Symbol eines Eiskristalles angezeigt.The cooling elements (12) provided for cooling the battery cells (11) are - here as in fol ing - for reasons of clarity not shown on all sides (1-6) of each battery cell (11); rather, their cooled surfaces are shown as indicated by the symbol of an ice crystal.
In der vorliegenden Ausführungsform sind innerhalb des Gehäuses (14) Druckkissen (13) zum Polstern der Batteriezellen (11) mit jeweils einem der Kühlelemente (12) integriert. Die auf diese Weise integral ausgebildeten Kühlelemente (12) und Druckkissen (13) sind jeweils gemeinsam zwischen im Stapel benachbarten Batteriezellen (11) angeordnet und von weiteren Kühlelementen (12) und Druckkissen (13) durch zwei der Batteriezellen (11) getrennt.In the present embodiment, pressure pads (13) for cushioning the battery cells (11) are integrated within the housing (14), each with one of the cooling elements (12). The cooling elements (12) and pressure pads (13) formed integrally in this way are each arranged together between adjacent battery cells (11) in the stack and are separated from further cooling elements (12) and pressure pads (13) by two of the battery cells (11).
Auch gemäß der in
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDED IN 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 documents cited by the applicant was 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 PatentliteraturPatent Literature Cited
- US 20210098760 A1 [0005]US20210098760A1 [0005]
- DE 102017112366 A1 [0006]DE 102017112366 A1 [0006]
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE102021130446.6A DE102021130446A1 (en) | 2021-11-22 | 2021-11-22 | Traction battery, its use and motor vehicle with such a battery |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE102021130446.6A DE102021130446A1 (en) | 2021-11-22 | 2021-11-22 | Traction battery, its use and motor vehicle with such a battery |
Publications (1)
Publication Number | Publication Date |
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DE102021130446A1 true DE102021130446A1 (en) | 2023-05-25 |
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Application Number | Title | Priority Date | Filing Date |
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DE102021130446.6A Pending DE102021130446A1 (en) | 2021-11-22 | 2021-11-22 | Traction battery, its use and motor vehicle with such a battery |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017207188A1 (en) | 2017-04-28 | 2018-10-31 | Robert Bosch Gmbh | Battery with a plurality of battery cells |
DE102017112366A1 (en) | 2017-06-06 | 2018-12-06 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Battery module with cooling system |
DE102018000112A1 (en) | 2018-01-10 | 2019-07-11 | Daimler Ag | Battery with a plurality of battery cells |
US20210098760A1 (en) | 2019-09-30 | 2021-04-01 | Sk Innovation Co., Ltd. | Battery Module |
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2021
- 2021-11-22 DE DE102021130446.6A patent/DE102021130446A1/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017207188A1 (en) | 2017-04-28 | 2018-10-31 | Robert Bosch Gmbh | Battery with a plurality of battery cells |
DE102017112366A1 (en) | 2017-06-06 | 2018-12-06 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Battery module with cooling system |
DE102018000112A1 (en) | 2018-01-10 | 2019-07-11 | Daimler Ag | Battery with a plurality of battery cells |
US20210098760A1 (en) | 2019-09-30 | 2021-04-01 | Sk Innovation Co., Ltd. | Battery Module |
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