DE102012210135A1 - Metal housing, useful in electrochemical cell e.g. galvanic cell e.g. nickel-metal hydride cell of battery module, comprises conversion layer on which paint coating for electrical insulation is located - Google Patents
Metal housing, useful in electrochemical cell e.g. galvanic cell e.g. nickel-metal hydride cell of battery module, comprises conversion layer on which paint coating for electrical insulation is located Download PDFInfo
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- DE102012210135A1 DE102012210135A1 DE201210210135 DE102012210135A DE102012210135A1 DE 102012210135 A1 DE102012210135 A1 DE 102012210135A1 DE 201210210135 DE201210210135 DE 201210210135 DE 102012210135 A DE102012210135 A DE 102012210135A DE 102012210135 A1 DE102012210135 A1 DE 102012210135A1
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 25
- 238000000576 coating method Methods 0.000 title claims abstract description 12
- 239000011248 coating agent Substances 0.000 title claims abstract description 11
- 239000003973 paint Substances 0.000 title claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 8
- 239000002184 metal Substances 0.000 title claims abstract description 8
- 238000010292 electrical insulation Methods 0.000 title claims abstract description 5
- 229910052987 metal hydride Inorganic materials 0.000 title claims description 3
- 229910001416 lithium ion Inorganic materials 0.000 claims description 13
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 239000004922 lacquer Substances 0.000 claims description 6
- 238000007743 anodising Methods 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 238000004532 chromating Methods 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- OMQSJNWFFJOIMO-UHFFFAOYSA-J zirconium tetrafluoride Chemical compound F[Zr](F)(F)F OMQSJNWFFJOIMO-UHFFFAOYSA-J 0.000 claims description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- XROWMBWRMNHXMF-UHFFFAOYSA-J titanium tetrafluoride Chemical compound [F-].[F-].[F-].[F-].[Ti+4] XROWMBWRMNHXMF-UHFFFAOYSA-J 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 229910000151 chromium(III) phosphate Inorganic materials 0.000 claims description 2
- IKZBVTPSNGOVRJ-UHFFFAOYSA-K chromium(iii) phosphate Chemical compound [Cr+3].[O-]P([O-])([O-])=O IKZBVTPSNGOVRJ-UHFFFAOYSA-K 0.000 claims description 2
- 239000008397 galvanized steel Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- JDZCKJOXGCMJGS-UHFFFAOYSA-N [Li].[S] Chemical compound [Li].[S] JDZCKJOXGCMJGS-UHFFFAOYSA-N 0.000 claims 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 claims 1
- 239000003792 electrolyte Substances 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009831 deintercalation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000002687 intercalation Effects 0.000 description 2
- 238000009830 intercalation Methods 0.000 description 2
- 150000003839 salts Chemical class 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
- 239000004593 Epoxy Substances 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical class [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007739 conversion coating Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001463 metal phosphate Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- QPJSUIGXIBEQAC-UHFFFAOYSA-N n-(2,4-dichloro-5-propan-2-yloxyphenyl)acetamide Chemical compound CC(C)OC1=CC(NC(C)=O)=C(Cl)C=C1Cl QPJSUIGXIBEQAC-UHFFFAOYSA-N 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- -1 salt lithium hexa-fluorophosphate Chemical class 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/36—Phosphatising
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/38—Chromatising
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/117—Inorganic material
- H01M50/119—Metals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/121—Organic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/1245—Primary casings; Jackets or wrappings characterised by the material having a layered structure characterised by the external coating on the casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
- H01M50/128—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers with two or more layers of only inorganic material
-
- 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
-
- 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
- H01M10/24—Alkaline accumulators
- H01M10/30—Nickel accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M12/00—Hybrid cells; Manufacture thereof
- H01M12/08—Hybrid cells; Manufacture thereof composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft ein Gehäuse aus Metall für eine elektrochemische Zelle mit einer Lackbeschichtung zur elektrischen Isolation, eine elektrochemische Zelle, ein Batteriemodul sowie ein Kraftfahrzeug. The present invention relates to a metal housing for an electrochemical cell with a paint coating for electrical insulation, an electrochemical cell, a battery module and a motor vehicle.
Stand der TechnikState of the art
Die Lithium-Ionen-Technologie ist prädestiniert für ein breites Einsatzgebiet von Applikationen, insbesondere in Fahrzeugen mit zumindest teilweisem elektrischen Antrieb, da sich diese neben anderen Vorteilen durch hohe Energiedichten und eine äußerst geringe Selbstentladung auszeichnet.The lithium-ion technology is predestined for a wide range of applications, in particular in vehicles with at least partial electric drive, since these are distinguished among other advantages by high energy densities and extremely low self-discharge.
Lithium-Ionen-Zellen besitzen mindestens eine positive und eine negative Elektrode (Kathode bzw. Anode), die Lithium-lonen (Li+) reversibel ein-(Interkalation) oder wieder auslagern (Deinterkalation) können. Damit die Interkalation bzw. die Deinterkalation von Lithium-Ionen stattfindet, ist die Anwesenheit von einem sogenannten Lithium-Ionen-Leitsalz notwendig. Die Lithium-Ionen dienen zum Ladungstransport innerhalb der Zelle während der Ladung bzw. Entladung. Praktisch bei allen derzeitigen Lithium-Ionen-Zellen sowohl im Consumer-Bereich, beispielsweise bei Mobiltelefonen, MP3-Playern oder Powertools, als auch im automotiven Bereich, beispielsweise bei hybrid-elektrischen Fahrzeugen (HEV), plug-in-hybrid-elektrischen Fahrzeugen, micro-hybrid Fahrzeugen und dergleichen wird als Lithium-Leitsalz Lithium-hexa-fluorophosphat (LiPF6) eingesetzt. Lithium-ion cells have at least one positive and one negative electrode (cathode or anode), the lithium ions (Li + ) reversible on (intercalation) or outsource (deintercalation) can. For the intercalation or deintercalation of lithium ions takes place, the presence of a so-called lithium-ion-conducting salt is necessary. The lithium ions serve to transport charge within the cell during charging or discharging. Virtually all current lithium-ion cells in the consumer sector, such as mobile phones, MP3 players or power tools, as well as in the automotive sector, such as hybrid electric vehicles (HEV), plug-in hybrid electric vehicles, micro-hybrid vehicles and the like is used as the lithium conducting salt lithium hexa-fluorophosphate (LiPF 6 ).
Batteriezellen können als Hardcase-Zellen, die in der Regel über ein metallisches Gehäuse in prismatischer oder zylindrischer Form verfügen, oder als sogenannte Pouch-Zellen (Softcase) konfektioniert sein.Battery cells can be configured as hardcase cells, which generally have a metallic housing in prismatic or cylindrical form, or as so-called pouch cells (softcase).
Hardcase-Zellen sind wegen der Anwesenheit einer metallischen Oberfläche naturgemäß nach außen elektrisch leitend. Gerade bei der seriellen Verschaltung von derartigen Lithium-Ionen-Zellen mit einem Hardcase kann es Probleme geben, insbesondere wenn ein Potenzial der inneren Elektrode auf dem Gehäuse liegt, so dass in assemblierten Modulen Spannungen zwischen den einzelnen Hardcase-Zellen durchschlagen können, wodurch ein assembliertes Modul beschädigt und unbrauchbar wird.Hardcase cells are naturally electrically conductive to the outside due to the presence of a metallic surface. Especially with the serial connection of such lithium-ion cells with a hardcase, there may be problems, especially if a potential of the inner electrode lies on the housing, so that in assembled modules voltages between the individual hardcase cells can penetrate, creating an assembled Module becomes damaged and unusable.
Die Ausführungsformen mit Hardcase-Gehäusen weisen dabei jeweils einen metallischen Grundkörper auf, der zu Zwecken der Isolation mit einer Folie, einem speziellen Isolationslack oder dergleichen aus einem elektrisch nicht leitenden Material bedeckt ist. Rein metallische Batteriezellengehäuse für Lithium-Ionen-Zellen, bei denen ein Potenzial auf dem Gehäuse liegt, müssen also nach außen elektrisch isoliert werden, wenn sie zu Hochvoltbatterien konfektioniert werden. Genannte Isolationslacke können beispielsweise auf der Basis von Polyurethan oder Epoxid hergestellt sein.The embodiments with hardcase housings each have a metallic base body, which is covered for purposes of insulation with a film, a special insulating varnish or the like of an electrically non-conductive material. Purely metallic battery cell housings for lithium-ion cells, which have a potential on the housing, must therefore be electrically insulated to the outside when they are assembled into high-voltage batteries. Said insulation lacquers can be produced for example on the basis of polyurethane or epoxy.
Bei Defekten der Zelle kann Elektrolyt austreten, der die Lackschicht durch Reaktion des Elektrolyten mit der Oberfläche des Zeltgehäuses, beispielsweise Aluminium, ablösen kann, so dass Kurzschlüsse auftreten.In the event of defects in the cell, electrolyte can escape, which can detach the lacquer layer by reaction of the electrolyte with the surface of the tent housing, for example aluminum, so that short circuits occur.
Es ist zwar aus dem Lackierbereich generell bekannt, die Oberflächen zu lackierender Gegenstände vorab zur Verbesserung der Anhaftung von Lacken zu behandeln, jedoch sind diese Maßnahmen durch die im Elektrolyt enthaltene Flusssäure (HF) nur wenig wirksam.Although it is generally known from the field of painting, the surfaces to be painted objects in advance to improve the adhesion of paints to treat, but these measures by the hydrofluoric acid (HF) contained in the electrolyte are only slightly effective.
In
Nachfolgend werden die Begriffe galvanische Zelle, insbesondere Lithium-Ionen-Zelle, -Modul, -Pack und -Batterie synonym verwendet.The terms galvanic cell, in particular lithium-ion cell, module, pack and battery are used synonymously below.
Offenbarung der ErfindungDisclosure of the invention
Erfindungsgemäß wird ein Gehäuse aus Metall für eine elektrochemische Zelle mit einer Lackbeschichtung zur elektrischen Isolation bereitgestellt, wobei das Gehäuse mit einer Konversionsschicht versehen ist, auf der die Lackbeschichtung befindlich ist.According to the invention, a metal housing is provided for an electrochemical cell with a lacquer coating for electrical insulation, wherein the housing is provided with a conversion layer on which the lacquer coating is located.
Die erfindungsgemäßen Gehäuse dienen für den Einsatz als sogenannte Hardcase-Zellen, die ein prismatisches oder zylindrisches Metallgehäuse besitzen. The housings according to the invention serve for use as so-called hardcase cells, which have a prismatic or cylindrical metal housing.
Bei dem Metall des Gehäuses handelt es sich üblicherweise um Eisen, das auch verzinkt sein kann, und Aluminium, wobei Aluminium aufgrund des geringeren spezifischen Gewichts bevorzugt wird. Die Auswahl des Metalls erfolgt ansonsten im Hinblick auf dessen Eignung für die unterschiedlichen Konversionsschichten.The metal of the housing is usually iron, which may also be galvanized, and aluminum, with aluminum being preferred because of the lower specific gravity. The selection of the metal is otherwise in terms of its suitability for the different conversion layers.
Das erfindungsgemäße Gehäuse ist grundsätzlich für alle Arten von elektrochemischen Zellen geeignet, wobei es vorzugsweise für Lithium-Ionen-Zellen, Nickel-Metall-Hydrid-Zellen oder Lithium-Metall-Polymer-Zellen und besonders bevorzugt für Lithium-Ionen-Zellen eingesetzt wird. The housing according to the invention is basically suitable for all types of electrochemical cells, wherein it is preferably used for lithium-ion cells, nickel-metal-hydride cells or lithium-metal-polymer cells and particularly preferably for lithium-ion cells.
Geeignete Lackbeschichtungen für elektrochemische Zellen sind dem Fachmann aus dem Stand der Technik bekannt und werden von diesem für die jeweilige Verwendung ausgewählt. Suitable lacquer coatings for electrochemical cells are known to the person skilled in the art and are selected by the person skilled in the art for the respective use.
Durch die Konversionsschicht, die direkt auf dem Gehäuse befindlich ist, wird die Haftung der Lackbeschichtung und insbesondere deren Beständigkeit gegen einen Angriff durch Elektrolyt, Leitsalz bzw. daraus freigesetzte Verbindungen auf das metallische Gehäuse deutlich verbessert. Die Lackbeschichtung löst sich daher nicht mehr vom Gehäuse bzw. erst nach einem deutlich längeren Zeitraum als üblicherweise nach dem Stand der Technik zu erwarten wäre.By the conversion layer, which is located directly on the housing, the adhesion of the paint coating and in particular their resistance to attack by electrolyte, electrolyte salt or released therefrom compounds on the metallic housing is significantly improved. The paint coating therefore no longer detaches from the housing or only after a much longer period than would normally be expected according to the prior art.
Die Konversionsschicht kann zur Vereinfachung der Herstellung das Gehäuse auf der Innen- und Außenseite bedecken.The conversion layer may cover the housing on the inside and outside for ease of manufacture.
Die Konversionsschicht wird vorzugsweise durch
- – Phosphatieren,
- – Chromatieren,
- – Anodisieren/Eloxieren oder
- m Ausbilden einer Titan- und/oder Zirkonfluorid-Schicht
- - phosphating,
- - chromating,
- - anodizing / anodising or
- m forming a titanium and / or Zirkonfluorid layer
Diese und andere Verfahren zur Herstellung einer Konversionsschicht sowie deren Einzelschritte sind dem Fachmann aus dem Stand der Technik grundsätzlich bekannt.These and other processes for the preparation of a conversion layer and their individual steps are known in principle to those skilled in the art.
Bei der Phosphatierung wird durch eine chemische Reaktion der metallischen Oberfläche mit wässrigen Phosphat-Lösungen die Konversionsschicht aus fest haftenden Metallphosphaten gebildet. In the case of phosphating, the conversion layer of firmly adhering metal phosphates is formed by a chemical reaction of the metallic surface with aqueous phosphate solutions.
Die Phosphatierung wird vorzugsweise bei Gehäusen aus Stahl, auch in verzinkter Form, und Aluminium verwendet.The phosphating is preferably used in housings made of steel, also in galvanized form, and aluminum.
Beim Chromatieren lässt man auf metallischen Oberflächen Chromsäure einwirken, wodurch Chromate gebildet werden. During chromating, chromic acid is allowed to act on metallic surfaces, forming chromates.
Bevorzugt werden Chrom-(VI)-freie Konversionsschichten. Preference is given to chromium (VI) -free conversion layers.
Diese Art der Konversionsschicht eignet sich besonders für Gehäuse aus Aluminium oder verzinktem Stahl. This type of conversion layer is particularly suitable for housings made of aluminum or galvanized steel.
Beim Anodisieren wird vorzugsweise auf Aluminium durch anodische Oxidation eine oxidische Konversionsschicht erzeugt.In anodizing, an oxidic conversion layer is preferably produced on aluminum by anodic oxidation.
Aluminiumgehäuse können auch mit einer Konversionsschicht auf Basis von Titanfluorid, Titan-/Zirkoniumfluorid oder Zirkoniumfluorid versehen werden. Dabei wird die üblicherweise gegebene Aluminiumoxidschicht ersetzt. Titan und Zirkonium liegen dabei als komplexe Oxide/Fluoride vor. Aluminum housings may also be provided with a conversion layer based on titanium fluoride, titanium / zirconium fluoride or zirconium fluoride. In this case, the usually given aluminum oxide layer is replaced. Titanium and zirconium are present as complex oxides / fluorides.
Vorgenannte Konversionsschichten haften zum einem sehr gut auf dem metallischen Untergrund und stellen ihrerseits einen sehr guten Haftgrund für die darauf befindliche Lackbeschichtung dar. The aforementioned conversion coatings adhere very well to the metallic substrate and, in turn, provide a very good primer for the paint coating thereon.
Bei den Konversionsschichten sind besonders Konversionsschichten auf der Basis von Chromphosphat (CrPO4,), Zirkon- und Titanfluorid bevorzugt, da diese besonders widerstandsfähig sind. Conversion layers based on chromium phosphate (CrPO 4 ,), zirconium and titanium fluoride are particularly preferred in the conversion layers, since they are particularly resistant.
Beansprucht werden neben einem Gehäuse für ein galvanisches Element, eine galvanische Zelle, vorzugsweise eine Lithium-Ionen-Zelle, die ein erfindungsgemäßes Gehäuse aufweist, ein Batteriemodul aus zumindest zwei galvanischen Zellen sowie ein Kraftfahrzeug mit einem elektrischen Antriebsmotor zum Antreiben des Kraftfahrzeugs und einem mit dem elektrischen Antriebsmotor verbundenen oder verbindbaren Batteriemodul. Claimed next to a housing for a galvanic element, a galvanic cell, preferably a lithium-ion cell having a housing according to the invention, a battery module of at least two galvanic cells and a motor vehicle with an electric drive motor for driving the motor vehicle and one with the electric drive motor connected or connectable battery module.
Die gemachten Ausführungen hinsichtlich des erfindungsgemäßen Gehäuses gelten entsprechend auch für die galvanische Zelle, das Batteriemodul sowie das Kraftfahrzeug und umgekehrt. The statements made with regard to the housing according to the invention also apply correspondingly to the galvanic cell, the battery module and the motor vehicle and vice versa.
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
Ein Ausführungsbeispiel der Erfindung wird anhand der Zeichnung und der nachfolgenden Beschreibung näher erläutert. Es zeigt:An embodiment of the invention will be explained in more detail with reference to the drawing and the description below. It shows:
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
- WO 02/101849 A2 [0009] WO 02/101849 A2 [0009]
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE201210210135 DE102012210135A1 (en) | 2012-06-15 | 2012-06-15 | Metal housing, useful in electrochemical cell e.g. galvanic cell e.g. nickel-metal hydride cell of battery module, comprises conversion layer on which paint coating for electrical insulation is located |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE201210210135 DE102012210135A1 (en) | 2012-06-15 | 2012-06-15 | Metal housing, useful in electrochemical cell e.g. galvanic cell e.g. nickel-metal hydride cell of battery module, comprises conversion layer on which paint coating for electrical insulation is located |
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DE102012210135A1 true DE102012210135A1 (en) | 2013-12-19 |
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DE201210210135 Withdrawn DE102012210135A1 (en) | 2012-06-15 | 2012-06-15 | Metal housing, useful in electrochemical cell e.g. galvanic cell e.g. nickel-metal hydride cell of battery module, comprises conversion layer on which paint coating for electrical insulation is located |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014112628A1 (en) * | 2014-09-02 | 2016-03-03 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Coolable battery module |
DE102021111440A1 (en) | 2021-05-04 | 2022-11-10 | Audi Aktiengesellschaft | Method for providing a cell housing part, cell housing part and battery cell for a high-voltage battery of a motor vehicle |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002101849A2 (en) | 2001-06-13 | 2002-12-19 | Spectra Power, Inc. | Tab surface treatments for polymer-metal laminate electrochemical cell packages |
-
2012
- 2012-06-15 DE DE201210210135 patent/DE102012210135A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002101849A2 (en) | 2001-06-13 | 2002-12-19 | Spectra Power, Inc. | Tab surface treatments for polymer-metal laminate electrochemical cell packages |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014112628A1 (en) * | 2014-09-02 | 2016-03-03 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Coolable battery module |
DE102021111440A1 (en) | 2021-05-04 | 2022-11-10 | Audi Aktiengesellschaft | Method for providing a cell housing part, cell housing part and battery cell for a high-voltage battery of a motor vehicle |
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