WO2024061866A1 - Method for cleaning workpiece carriers for battery cell lacquering, device for cleaning workpiece carriers for battery cell lacquering, and vehicle - Google Patents

Method for cleaning workpiece carriers for battery cell lacquering, device for cleaning workpiece carriers for battery cell lacquering, and vehicle Download PDF

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Publication number
WO2024061866A1
WO2024061866A1 PCT/EP2023/075733 EP2023075733W WO2024061866A1 WO 2024061866 A1 WO2024061866 A1 WO 2024061866A1 EP 2023075733 W EP2023075733 W EP 2023075733W WO 2024061866 A1 WO2024061866 A1 WO 2024061866A1
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WO
WIPO (PCT)
Prior art keywords
workpiece carrier
battery cell
workpiece
painting
milling
Prior art date
Application number
PCT/EP2023/075733
Other languages
German (de)
French (fr)
Inventor
Sebastian Schneider
Julian Hackl
Tobias MENDLER
Thomas Mayer
Original Assignee
Bayerische Motoren Werke Aktiengesellschaft
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bayerische Motoren Werke Aktiengesellschaft filed Critical Bayerische Motoren Werke Aktiengesellschaft
Publication of WO2024061866A1 publication Critical patent/WO2024061866A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
    • B08B1/32—Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C1/00—Milling machines not designed for particular work or special operations
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
    • 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

Definitions

  • the present invention relates to a method for cleaning workpiece supports for battery cell painting.
  • the invention further relates to a device for cleaning workpiece carriers for battery cell painting and a vehicle having a battery with at least one battery cell which is painted using a workpiece carrier which is cleaned using such a method and/or such a device.
  • a battery cell housing is painted to prevent a short circuit between two battery cells and the presence of voltage on the housing.
  • the housing is painted in a painting and hardening station, where paint is first applied to the housing and then hardened.
  • the battery cells are conveyed through the painting and hardening station via individual workpiece carriers pushed together.
  • the battery cells float on the workpiece carriers or on a workpiece carrier belt, which is formed by the workpiece carriers pushed together, with their pole side facing downwards.
  • the workpiece carriers are also painted.
  • the wet battery cell paint is hardened in the subsequent hardening step and therefore also adheres to the workpiece supports. These then have to be freed from the adhering paint in an extra process step before unpainted cells are placed on the workpiece carrier for painting.
  • the present invention is based on the object of creating a method, a device and a vehicle which enable improved cleaning of a workpiece carrier for battery cell painting.
  • a method for cleaning workpiece supports for battery cell painting is proposed.
  • a coating applied to the workpiece carrier during battery cell painting is removed using mechanical processing.
  • the coating is removed without removing the carrier material of the workpiece carrier. This ensures that the battery cells positioned on the workpiece carriers are always painted evenly.
  • the method according to the invention has, for example, lower operating costs compared to CO2 cleaning, since no CO2 is required, as well as a lower noise level.
  • the workpiece carrier is made of Teflon.
  • the process advantageously takes place immediately after a painting and hardening station.
  • the applied coating can be an insulating varnish that is applied to a battery cell, in particular a housing of the battery cell.
  • the coating applied to the workpiece carrier excludes the use of sandblasting, CO2 cleaning, scrapers, squeegees or scratches as mechanical processing, since these all cause abrasion of the carrier material and are therefore very expensive and also one have high noise levels.
  • the coating is removed from the workpiece carrier by milling.
  • the milling can be carried out in a separate device, for example a milling station, which is connected downstream of a painting and hardening station.
  • the device can be provided with an enclosure. Cleaning the workpiece carrier using a milling process makes it possible for only the coating, in particular the hardened paint, to be gently removed from the workpiece carrier. This means that there is no abrasion on the workpiece carrier and therefore no wear on the workpiece carrier. As a result, uniform painting of the battery cells positioned on the workpiece carriers is always possible.
  • three individual milling machines are used for milling. It is also advantageous to use two disk milling machines and one roller milling machine as individual milling machines.
  • an upper side of the workpiece carrier is machined with a single milling machine and the opposite long sides of the workpiece carrier are machined with the other two individual milling machines.
  • the long sides of the workpiece carrier are advantageously machined using the two disc milling machines, and the top side is machined using the roller milling machine.
  • the roller milling machine advantageously has a projection by means of which a recess for receiving a pole of the battery cell is cleaned.
  • the workpiece carrier is mechanically processed in such a way that the workpiece carrier has its initial geometry or original geometry before painting.
  • the workpiece carrier has the initially created geometry after cleaning.
  • the coating, in particular the hardened paint is thus milled off in a targeted manner, so that the workpiece carrier geometry is retained without further mechanical abrasion of the workpiece carrier material. This results in wear optimization of the workpiece carrier, savings in spare parts management and a reduction in operating costs.
  • the workpiece carrier has its initially created geometry, as the painting process reacts very sensitively to the smallest geometric changes or settings of the application unit to the battery cell. If the geometry of the workpiece carrier changes due to the cleaning process, the battery cell to be painted would no longer be on the workpiece carrier as originally released. As a result, the application parameters of the application unit that were originally set for the initial geometry of the workpiece carrier are no longer applicable, since the battery cell is then oriented differently to the application unit and as a result product requirements that are to be achieved by the painting are no longer met. Since the workpiece carrier has its initial geometry after mechanical processing, the product requirements required by the painting are met.
  • the workpiece carrier is produced by means of mechanical processing by introducing an initial geometry or original geometry into a blank, the initial geometry or original geometry being used as a starting dimension for mechanical processing of the workpiece carrier.
  • a blank for example a rectangular block of Teflon
  • the set milling positions are saved and then adopted for the individual milling machines to remove the coating.
  • the workpiece carriers are specifically milled after the painting and hardening station and the initial workpiece carrier geometry is retained without further mechanical abrasion of the workpiece carrier material, in particular Teflon material.
  • the manufacturing costs for the workpiece carriers are reduced because only one block is required, which is milled onto the workpiece carrier geometry by a milling station.
  • a depression for receiving a battery cell is introduced into the blank as an initial geometry.
  • a pole of a battery cell is inserted into the recess.
  • the depression is advantageously made in an upper side of the blank. It is also advantageous to make the depression into the blank using a roller milling machine.
  • the roller milling machine can have a projection.
  • a device for cleaning workpiece supports for battery cell painting is proposed. The device has a mechanical processing device for carrying out a method according to the invention.
  • the device can be designed as a milling station which is connected downstream of a painting and hardening station.
  • the device can be provided with a housing.
  • the mechanical processing device advantageously has three individual milling machines. Furthermore, the mechanical processing device advantageously has a roller milling machine and two disk milling machines. Advantageously, the two disk milling machines are used to machine the long sides of the workpiece carrier and the roller milling machine is used to machine the top side of the workpiece carrier.
  • the roller milling machine advantageously has a projection by means of which a recess for receiving a pole of the battery cell is introduced or cleaned into the workpiece carrier.
  • the device has a workpiece carrier production station upstream of a painting and curing station, which has a mechanical processing device for introducing a geometry into a blank.
  • the mechanical processing device has three individual milling machines, with two milling machines being designed as disk milling machines and one milling machine being designed as a roller milling machine.
  • a vehicle which has a battery with at least one battery cell which is painted using a workpiece carrier which is cleaned using a method according to the invention and/or a device according to the invention.
  • FIG. 1 shows a vehicle with a battery formed from battery cells
  • FIG. 2 shows a workpiece carrier for battery cell painting with a battery cell arranged thereon
  • Fig. 3 is a schematic representation of the manufacture of the workpiece carrier shown in Fig. 2;
  • Fig. 5 is a schematic representation of a painting and hardening station and a downstream device for cleaning the workpiece carriers.
  • FIG. 1 shows a vehicle 10 which is operated by an electric motor, not shown, which is supplied with electrical energy by a battery 12.
  • the battery 12 has a large number of battery cells 14, which are shown schematically in FIG. 2.
  • the battery cell 14, in particular a housing 15 of the battery cell 14, is painted in order to avoid a short circuit between two adjacent battery cells 14 and the application of a voltage to the battery cell 14.
  • the workpiece carrier 16 has a recess 18 into which a pole 20 of the battery cell 14 rests.
  • the housing 15 of the battery cell 14 rests on a top side 22 of the workpiece carrier 16.
  • a rectangular blank 24 made of Teflon is machined mechanically, as shown schematically in FIG. 3.
  • the blank 24 is processed using the mechanical processing device 26 shown in FIG. 4.
  • the mechanical processing device 26 has three individual milling machines 28, with one milling machine 28 being designed as a roller milling machine 30 and two milling machines 28 being designed as disk milling machines 32.
  • the two disk milling machines 32 machine the opposite longitudinal sides 36 of the workpiece carrier 16.
  • the roller milling machine 30 processes the top side 22 of the workpiece carrier 16, in particular the roller milling machine 30 brings the recess 18 into the top side 22 of the workpiece carrier 16.
  • the roller milling machine 30 has a projection 34, as can be seen in FIG. 4.
  • FIG. 5 schematically shows a painting and hardening station 40, in which the battery cells 14 arranged on the workpiece carrier 16 are first coated, in particular painted, and then the applied coating 37, in particular the paint 39, is cured.
  • the workpiece carriers 16 are also painted.
  • the device 40 has the mechanical processing device 26 shown in FIG. 4 for cleaning the workpiece carriers 16.
  • the device 40 in particular its mechanical processing device 26, which has the roller milling machine 30 and the two disk milling machines 32, mills the workpiece carrier 16 to the initial geometry or original geometry.
  • the milling positions of the roller milling machine 30 and the disc milling machines 32 set during the production of the workpiece carrier 16 are adopted for the mechanical processing device 26.
  • only the adhering, hardened paint 39 is specifically milled off, and the initial geometry or original geometry of the workpiece carrier 16 is retained without further mechanical abrasion of the workpiece carrier material, in particular the Teflon material.
  • the workpiece carriers 16 After the workpiece carriers 16 have been freed from the adhering, hardened paint 39, they can be re-equipped with new battery cells 14 and then fed to the painting and hardening station 38, as shown schematically in Fig. 5 by means of the arrows.
  • the device 40 and the method for cleaning the workpiece carrier 16 are characterized in that the adhering, hardened paint 39 is milled off in a targeted manner by milling the workpiece carrier 16 to its initial geometry or original geometry. As a result, the workpiece carrier geometry is retained without further mechanical abrasion of the workpiece carrier material. In addition, the wear of the workpiece carrier 16, the costs for spare parts management and the operating costs are reduced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Coating Apparatus (AREA)
  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)

Abstract

The invention relates to a method for cleaning workpiece carriers (16) for battery cell lacquering, in which method a coating applied to the workpiece carrier (16) during the battery cell lacquering is removed by mechanical machining. The invention further relates to a device (40) for cleaning workpiece carriers (16) for battery cell lacquering, and to a vehicle having a battery with at least one battery cell which is lacquered with a workpiece carrier (16) which is cleaned by a method according to the invention and/or a device according to the invention.

Description

Verfahren zum Reinigen von Werkstückträgern für die Batteriezellenlackierung, Vorrichtung zum Reinigen von Werkstückträgern für die Batteriezellenlackierung sowie Fahrzeug Method for cleaning workpiece carriers for battery cell painting, device for cleaning workpiece carriers for battery cell painting and vehicle
Die vorliegende Erfindung betrifft ein Verfahren zum Reinigen von Werkstückträgem für die Batteriezellenlackierung. Des Weiteren betrifft die Erfindung eine Vorrichtung zum Reinigen von Werkstückträgem für die Batteriezellenlackierung sowie ein Fahrzeug aufweisend eine Batterie mit wenigstens einer Batteriezelle, die mittels eines Werkstückträgers lackiert ist, der mittels eines derartigen Verfahrens und/oder einer derartigen Vorrichtung gereinigt ist. The present invention relates to a method for cleaning workpiece supports for battery cell painting. The invention further relates to a device for cleaning workpiece carriers for battery cell painting and a vehicle having a battery with at least one battery cell which is painted using a workpiece carrier which is cleaned using such a method and/or such a device.
Bei der Fertigung von Batteriezellen wird ein Gehäuse der Batteriezelle lackiert, um einen Kurzschluss zwischen zwei Batteriezellen sowie das Anliegen einer Spannung an dem Gehäuse zu vermeiden. When manufacturing battery cells, a battery cell housing is painted to prevent a short circuit between two battery cells and the presence of voltage on the housing.
Beispielsweise ist aus DE 10 2018 128 501 A1 ein Verfahren zum Beschichten einer Batteriezelle einer Fahrzeugbatterie bekannt, bei welchem die Batteriezelle mit einer isolierenden Lackschicht beschichtet wird. For example, from DE 10 2018 128 501 A1 a method for coating a battery cell of a vehicle battery is known, in which the battery cell is coated with an insulating lacquer layer.
Die Lackierung des Gehäuses erfolgt in einer Lackier- und Härtestation, in der zuerst Lack auf das Gehäuse appliziert und anschließend gehärtet wird. Die Förderung der Batteriezellen durch die Lackier- und Härtestation erfolgt über zusammengeschobene einzelne Werkstückträger. Dabei schweben die Batteriezellen auf den Werkstückträgem beziehungsweise auf einem Werkstückträgerband, das durch die zusammengeschobenen Werkstückträger gebildet ist, mit ihrer Polseite nach unten. Beim Lackieren werden die Werkstückträger ebenfalls mitlackiert. Der nasse Batteriezellenlack wird im nachfolgenden Härteschritt ausgehärtet und haftet somit auch auf den Werkstückträgem. Diese müssen dann in einem extra Prozessschritt von dem anhaftenden Lack befreit werden, bevor wieder nicht-lackierte Zellen auf den Werkstückträgem zur Lackierung aufgesetzt werden. Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren, eine Vorrichtung sowie ein Fahrzeug zu schaffen, die eine verbesserte Reinigung eines Werkstückträgers für die Batteriezellenlackierung ermöglichen. The housing is painted in a painting and hardening station, where paint is first applied to the housing and then hardened. The battery cells are conveyed through the painting and hardening station via individual workpiece carriers pushed together. The battery cells float on the workpiece carriers or on a workpiece carrier belt, which is formed by the workpiece carriers pushed together, with their pole side facing downwards. When painting, the workpiece carriers are also painted. The wet battery cell paint is hardened in the subsequent hardening step and therefore also adheres to the workpiece supports. These then have to be freed from the adhering paint in an extra process step before unpainted cells are placed on the workpiece carrier for painting. The present invention is based on the object of creating a method, a device and a vehicle which enable improved cleaning of a workpiece carrier for battery cell painting.
Zur Lösung der Aufgabe wird ein Verfahren mit den Merkmalen des Anspruchs 1 , eine Vorrichtung mit den Merkmalen des Anspruchs 8 und ein Fahrzeug mit den Merkmalen des Anspruchs 10 vorgeschlagen. To solve the problem, a method with the features of claim 1, a device with the features of claim 8 and a vehicle with the features of claim 10 are proposed.
Vorteilhafte Ausgestaltungen des Verfahrens und der Vorrichtung sind Gegenstand der jeweils abhängigen Ansprüche. Advantageous embodiments of the method and the device are the subject of the respective dependent claims.
Gemäß einem ersten Aspekt der Erfindung wird ein Verfahren zum Reinigen von Werkstückträgem für die Batteriezellenlackierung vorgeschlagen. Bei dem Verfahren wird eine während der Batteriezellenlackierung auf dem Werkstückträger aufgebrachte Beschichtung mittels einer mechanischen Bearbeitung entfernt. According to a first aspect of the invention, a method for cleaning workpiece supports for battery cell painting is proposed. In the process, a coating applied to the workpiece carrier during battery cell painting is removed using mechanical processing.
Durch den Einsatz eines mechanischen Bearbeitungsverfahrens zum Reinigen des Werkstückträgers wird die Beschichtung entfernt, ohne dass das Trägermaterial des Werkstückträgers entfernt wird. Dadurch wird stets eine gleichmäßige Lackierung der auf den Werkstückträgern positionierten Batteriezellen ermöglicht. Zudem weist das erfindungsgemäße Verfahren beispielsweise gegenüber der CO2-Reinigung geringere Betriebskosten, da kein CO2 benötigt wird, sowie einen geringeren Lärmpegel auf. By using a mechanical processing method to clean the workpiece carrier, the coating is removed without removing the carrier material of the workpiece carrier. This ensures that the battery cells positioned on the workpiece carriers are always painted evenly. In addition, the method according to the invention has, for example, lower operating costs compared to CO2 cleaning, since no CO2 is required, as well as a lower noise level.
In einer vorteilhaften Ausgestaltung ist der Werkstückträger aus Teflon. In an advantageous embodiment, the workpiece carrier is made of Teflon.
Vorteilhaft erfolgt das Verfahren unmittelbar nach einer Lackier- und Härtestation. The process advantageously takes place immediately after a painting and hardening station.
Die aufgebrachte Beschichtung kann ein isolierender Lack sein, der auf eine Batteriezelle, insbesondere einem Gehäuse der Batteriezelle, appliziert wird. The applied coating can be an insulating varnish that is applied to a battery cell, in particular a housing of the battery cell.
Das erfindungsgemäße Verfahrens mittels dem die auf den Werkstückträger aufgebrachte Beschichtung entfernt wird, schließt die Verwendung von Sandstrahlen, CO2-Reinigung, Schabern, Rakeln oder Kratzern als mechanische Bearbeitung aus, da diese allesamt eine Abrasion des Trägermaterials verursachen und dadurch sehr kostspielig sind und zudem einen hohen Lärmpegel aufweisen. In einer vorteilhaften Ausgestaltung wird die Beschichtung von dem Werkstückträger durch Fräsen entfernt. Das Fräsen kann in einer separaten Vorrichtung beispielsweise einer Frässtation, welche einer Lackier- und Härtestation nachgeschaltet ist, erfolgen. Die Vorrichtung kann mit einer Einhausung versehen sein. Die Reinigung der Werkstückträger mittels eines Fräsprozesses ermöglicht es, dass nur die Beschichtung, insbesondere der angehärtete Lack, von dem Werkstückträger schonend abgenommen wird. Dadurch erfolgen keine Abrasion am Werkstückträger und somit kein Verschleiß am Werkstückträger. Infolgedessen wird stets eine gleichmäßige Lackierung der auf den Werkstückträgem positionierten Batteriezellen ermöglicht. The method according to the invention, by means of which the coating applied to the workpiece carrier is removed, excludes the use of sandblasting, CO2 cleaning, scrapers, squeegees or scratches as mechanical processing, since these all cause abrasion of the carrier material and are therefore very expensive and also one have high noise levels. In an advantageous embodiment, the coating is removed from the workpiece carrier by milling. The milling can be carried out in a separate device, for example a milling station, which is connected downstream of a painting and hardening station. The device can be provided with an enclosure. Cleaning the workpiece carrier using a milling process makes it possible for only the coating, in particular the hardened paint, to be gently removed from the workpiece carrier. This means that there is no abrasion on the workpiece carrier and therefore no wear on the workpiece carrier. As a result, uniform painting of the battery cells positioned on the workpiece carriers is always possible.
In einer vorteilhaften Ausgestaltung werden zum Fräsen drei Einzelfräsen verwendet. Weiterhin vorteilhaft werden als Einzelfräsen zwei Scheibenfräsen und eine Walzenfräse verwendet. In an advantageous embodiment, three individual milling machines are used for milling. It is also advantageous to use two disk milling machines and one roller milling machine as individual milling machines.
In einer vorteilhaften Ausgestaltung wird mit einer Einzelfräse eine Oberseite des Werkstückträgers bearbeitet und mit den anderen beiden Einzelfräsen werden die sich gegenüberliegenden Längsseiten des Werkstückträgers bearbeitet. Vorteilhaft werden mittels der beiden Scheibenfräsen die Längsseiten des Werkstückträgers bearbeitet, und mittels der Walzenfräse wird die Oberseite bearbeitet. Vorteilhaft weist die Walzenfräse einen Vorsprung auf, mittels dem eine Vertiefung zur Aufnahme eines Pols der Batteriezelle gereinigt wird. In an advantageous embodiment, an upper side of the workpiece carrier is machined with a single milling machine and the opposite long sides of the workpiece carrier are machined with the other two individual milling machines. The long sides of the workpiece carrier are advantageously machined using the two disc milling machines, and the top side is machined using the roller milling machine. The roller milling machine advantageously has a projection by means of which a recess for receiving a pole of the battery cell is cleaned.
In einer vorteilhaften Ausgestaltung wird der Werkstückträger derart mechanisch bearbeitet, dass der Werkstückträger seine vor dem Lackieren initiale Geometrie beziehungsweise Ursprungsgeometrie aufweist. Dadurch weist der Werkstückträger nach dem Reinigen die initial erzeugte Geometrie auf. Somit wird die Beschichtung, insbesondere der gehärtete Lack, gezielt abgefräst, so dass die Werkstückträgergeometrie ohne weitere mechanische Abrasion von Werkstückträgermaterial erhalten bleibt. Daraus resultieren eine Verschleißoptimierung des Werkstückträgers, eine Einsparung von Ersatzteilmanagement und eine Reduzierung der Betriebskosten. In an advantageous embodiment, the workpiece carrier is mechanically processed in such a way that the workpiece carrier has its initial geometry or original geometry before painting. As a result, the workpiece carrier has the initially created geometry after cleaning. The coating, in particular the hardened paint, is thus milled off in a targeted manner, so that the workpiece carrier geometry is retained without further mechanical abrasion of the workpiece carrier material. This results in wear optimization of the workpiece carrier, savings in spare parts management and a reduction in operating costs.
Für eine einwandfreie Lackierung der Batteriezellen ist es erforderlich, dass der Werkstückträger seine initial erzeugte Geometrie aufweist, da der Lackierprozess sehr sensibel auf minimalste geometrische Änderungen beziehungsweise Einstellungen der Applikationseinheit zur Batteriezelle reagiert. Bei einer Änderung der Geometrie des Werkstückträgers durch den Reinigungsprozess stünde die zu lackierende Batteriezelle nicht mehr wie ursprünglich freigegeben auf dem Werkstückträger. Dadurch sind die ursprünglich zur Initialgeometrie des Werkstückträgers eingestellten Applikationsparameter der Applikationseinheit hinfällig, da die Batteriezelle dann anders zu der Applikationseinheit orientiert steht und dadurch Produktanforderungen, die durch die Lackierung erreicht werden sollen, nicht mehr erfüllt werden. Da der Werkstückträger nach der mechanischen Bearbeitung seine initiale Geometrie aufweist, werden somit die durch die Lackierung geforderten Produktanforderungen erfüllt. For a perfect painting of the battery cells, it is necessary that the workpiece carrier has its initially created geometry, as the painting process reacts very sensitively to the smallest geometric changes or settings of the application unit to the battery cell. If the geometry of the workpiece carrier changes due to the cleaning process, the battery cell to be painted would no longer be on the workpiece carrier as originally released. As a result, the application parameters of the application unit that were originally set for the initial geometry of the workpiece carrier are no longer applicable, since the battery cell is then oriented differently to the application unit and as a result product requirements that are to be achieved by the painting are no longer met. Since the workpiece carrier has its initial geometry after mechanical processing, the product requirements required by the painting are met.
In einer vorteilhaften Ausgestaltung wird der Werkstückträger mittels der mechanischen Bearbeitung erzeugt wird, indem in einen Rohling eine initiale Geometrie beziehungsweise Ursprungsgeometrie eingebracht wird, wobei die initiale Geometrie beziehungswiese Ursprungsgeometrie als Ausgangsmaß zur mechanischen Bearbeitung des Werkstückträgers verwendet wird. Somit wird initial ein Rohling, beispielsweise ein rechteckiger Block aus Teflon, auf Geometrie gefräst, indem beispielsweise in den rechteckigen Teflonblock eine Vertiefung eingefräst wird und/oder Längsseiten des Teflonblocks bearbeitet werden. Die eingestellten Fräspositionen werden gespeichert und anschließend für die Einzelfräsen zum Entfernen der Beschichtung übernommen. Dadurch werden die Werkstückträger nach der Lackier- und Härtestation gezielt abgefräst und so die initiale Werkstückträgergeometrie ohne weitere mechanische Abrasion vom Werkstückträgermaterial, insbesondere Teflonmaterial, beibehalten. Darüber hinaus werden die Fertigungskosten für die Werkstückträger reduziert, da nur ein Block benötig wird, welcher durch eine Frässtation auf die Werkstückträgergeometrie gefräst wird. In an advantageous embodiment, the workpiece carrier is produced by means of mechanical processing by introducing an initial geometry or original geometry into a blank, the initial geometry or original geometry being used as a starting dimension for mechanical processing of the workpiece carrier. Thus, initially a blank, for example a rectangular block of Teflon, is milled to geometry, for example by milling a recess into the rectangular Teflon block and/or machining the long sides of the Teflon block. The set milling positions are saved and then adopted for the individual milling machines to remove the coating. As a result, the workpiece carriers are specifically milled after the painting and hardening station and the initial workpiece carrier geometry is retained without further mechanical abrasion of the workpiece carrier material, in particular Teflon material. In addition, the manufacturing costs for the workpiece carriers are reduced because only one block is required, which is milled onto the workpiece carrier geometry by a milling station.
In einer vorteilhaften Ausgestaltung wird in den Rohling als initiale Geometrie eine Vertiefung zur Aufnahme einer Batteriezelle eingebracht. In die Vertiefung liegt ein Pol einer Batteriezelle ein. Vorteilhaft wird die Vertiefung in eine Oberseite des Rohlings eingebracht. Weiterhin vorteilhaft wird die Vertiefung mittels einer Walzenfräse in den Rohling eingebracht. Hierzu kann die Walzenfräse einen Vorsprung aufweisen. Gemäß einem weiteren Aspekt der Erfindung wird eine Vorrichtung zum Reinigen von Werkstückträgem für die Batteriezellenlackierung vorgeschlagen. Die Vorrichtung weist eine mechanische Bearbeitungsvorrichtung zur Durchführung eines erfindungsgemäßen Verfahrens auf. In an advantageous embodiment, a depression for receiving a battery cell is introduced into the blank as an initial geometry. A pole of a battery cell is inserted into the recess. The depression is advantageously made in an upper side of the blank. It is also advantageous to make the depression into the blank using a roller milling machine. For this purpose, the roller milling machine can have a projection. According to a further aspect of the invention, a device for cleaning workpiece supports for battery cell painting is proposed. The device has a mechanical processing device for carrying out a method according to the invention.
Die Vorrichtung kann als eine Frässtation ausgebildet sein, welche einer Lackier- und Härtestation nachgeschaltet ist. Die Vorrichtung kann mit einer Einhausung versehen sein. The device can be designed as a milling station which is connected downstream of a painting and hardening station. The device can be provided with a housing.
Vorteilhaft weist die mechanische Bearbeitungsvorrichtung drei Einzelfräsen auf. Weiterhin vorteilhaft weist die mechanische Bearbeitungsvorrichtung eine Walzenfräse und zwei Scheibenfräsen auf. Vorteilhaft werden mittels der beiden Scheibenfräsen Längsseiten des Werkstückträgers bearbeitet und mittels der Walzenfräse wird eine Oberseite des Werkstückträgers bearbeitet. Vorteilhaft weist die Walzenfräse einen Vorsprung auf, mittels dem eine Vertiefung zur Aufnahme eines Pols der Batteriezelle in den Werkstückträger eingebracht beziehungsweise gereinigt wird. The mechanical processing device advantageously has three individual milling machines. Furthermore, the mechanical processing device advantageously has a roller milling machine and two disk milling machines. Advantageously, the two disk milling machines are used to machine the long sides of the workpiece carrier and the roller milling machine is used to machine the top side of the workpiece carrier. The roller milling machine advantageously has a projection by means of which a recess for receiving a pole of the battery cell is introduced or cleaned into the workpiece carrier.
In einer vorteilhaften Ausgestaltung weist die Vorrichtung eine einer Lackier- und Härtungsstation vorgeschaltete Werkstückträgererzeugungsstation auf, die eine mechanische Bearbeitungsvorrichtung zum Einbringen einer Geometrie in einen Rohling aufweist. In an advantageous embodiment, the device has a workpiece carrier production station upstream of a painting and curing station, which has a mechanical processing device for introducing a geometry into a blank.
In einer vorteilhaften Ausgestaltung weist die mechanische Bearbeitungsvorrichtung drei Einzelfräsen auf, wobei zwei Fräsen als Scheibenfräsen ausgebildet sind, und eine Fräse als Walzenfräse ausgebildet ist. In an advantageous embodiment, the mechanical processing device has three individual milling machines, with two milling machines being designed as disk milling machines and one milling machine being designed as a roller milling machine.
Gemäß einem weiteren Aspekt der Erfindung wird ein Fahrzeug vorgeschlagen, das eine Batterie mit wenigstens einer Batteriezelle aufweist, die mittels eines Werkstückträgers lackiert ist, der mittels eines erfindungsgemäßen Verfahrens und/oder einer erfindungsgemäßen Vorrichtung gereinigt ist. According to a further aspect of the invention, a vehicle is proposed which has a battery with at least one battery cell which is painted using a workpiece carrier which is cleaned using a method according to the invention and/or a device according to the invention.
Nachfolgend werden ein Fahrzeug, eine Vorrichtung zum Reinigen von Werkstückträgem für die Batteriezellenlackierung, ein Verfahren zum Reinigen von Werkstückträgem für die Batteriezellenlackierung sowie weitere Merkmale und Vorteile anhand von Ausführungsbeispielen näher erläutert, die in den Figuren schematisch dargestellt sind. Hierbei zeigen: Below, a vehicle, a device for cleaning workpiece carriers for battery cell painting, a method for cleaning workpiece carriers for battery cell painting and other features and Advantages explained in more detail using exemplary embodiments, which are shown schematically in the figures. Here show:
Fig. 1 ein Fahrzeug mit einer aus Batteriezellen gebildeten Batterie; 1 shows a vehicle with a battery formed from battery cells;
Fig. 2 einen Werkstückträger zur Batteriezellenlackierung mit einer darauf angeordneten Batteriezelle; 2 shows a workpiece carrier for battery cell painting with a battery cell arranged thereon;
Fig. 3 eine schematische Darstellung der Herstellung des in Fig. 2 dargestellten Werkstückträgers; Fig. 3 is a schematic representation of the manufacture of the workpiece carrier shown in Fig. 2;
Fig. 4 eine vergrößerte Darstellung einer Vorrichtung zum Reinigen und/oder Herstellen des Werkstückträgers; und 4 shows an enlarged view of a device for cleaning and/or producing the workpiece carrier; and
Fig. 5 eine schematische Darstellung einer Lackier- und Härtestation und einer nachgeschalteten Vorrichtung zum Reinigen der Werkstückträger. Fig. 5 is a schematic representation of a painting and hardening station and a downstream device for cleaning the workpiece carriers.
In Fig. 1 ist ein Fahrzeug 10 gezeigt, das von einem nicht dargestellten Elektromotor betrieben wird, der von einer Batterie 12 mit elektrischer Energie versorgt wird.1 shows a vehicle 10 which is operated by an electric motor, not shown, which is supplied with electrical energy by a battery 12.
Die Batterie 12 weist eine Vielzahl an Batteriezellen 14, die in Fig. 2 schematisch dargestellt sind, auf. Die Batteriezelle 14, insbesondere ein Gehäuse 15 der Batteriezelle 14 wird lackiert, um einen Kurzschluss zwischen zwei benachbarten Batteriezellen 14 sowie die Anlage einer Spannung an der Batteriezelle 14 zu vermeiden. The battery 12 has a large number of battery cells 14, which are shown schematically in FIG. 2. The battery cell 14, in particular a housing 15 of the battery cell 14, is painted in order to avoid a short circuit between two adjacent battery cells 14 and the application of a voltage to the battery cell 14.
Zur Lackierung der Batteriezelle 14 wird selbige auf einem Werkstückträger 16 platziert, wie in Fig. 2 ersichtlich ist. Hierzu weist der Werkstückträger 16 eine Vertiefung 18 auf, in die ein Pol 20 der Batteriezelle 14 einliegt. Das Gehäuse 15 der Batteriezelle 14 liegt auf einer Oberseite 22 des Werkstückträgers 16 auf. To paint the battery cell 14, it is placed on a workpiece carrier 16, as can be seen in FIG. 2. For this purpose, the workpiece carrier 16 has a recess 18 into which a pole 20 of the battery cell 14 rests. The housing 15 of the battery cell 14 rests on a top side 22 of the workpiece carrier 16.
Zur Erzeugung einer initialen Geometrie beziehungsweise Ursprungsgeometrie des Werkstückträgers 16 wird ein rechteckiger Rohling 24 aus Teflon mechanisch bearbeitet, wie dies schematisch in Fig. 3 dargestellt ist. Hierzu wird der Rohling 24 mittels der in Fig. 4 dargestellten mechanischen Bearbeitungsvorrichtung 26 bearbeitet. Die mechanische Bearbeitungsvorrichtung 26 weist drei Einzelfräsen 28 auf, wobei eine Fräse 28 als Walzenfräse 30 und zwei Fräsen 28 als Scheibenfräsen 32 ausgebildet sind. Die beiden Scheibenfräsen 32 bearbeiten die sich gegenüberliegenden Längsseiten 36 des Werkstückträgers 16. Die Walzenfräse 30 bearbeitet die Oberseite 22 des Werkstückträgers 16, insbesondere bringt die Walzenfräse 30 die Vertiefung 18 in die Oberseite 22 des Werkstückträgers 16 ein. Hierzu weist die Walzenfräse 30 einen Vorsprung 34 auf, wie in Fig. 4 ersichtlich ist. To create an initial geometry or original geometry of the workpiece carrier 16, a rectangular blank 24 made of Teflon is machined mechanically, as shown schematically in FIG. 3. For this purpose, the blank 24 is processed using the mechanical processing device 26 shown in FIG. 4. The mechanical processing device 26 has three individual milling machines 28, with one milling machine 28 being designed as a roller milling machine 30 and two milling machines 28 being designed as disk milling machines 32. The two disk milling machines 32 machine the opposite longitudinal sides 36 of the workpiece carrier 16. The roller milling machine 30 processes the top side 22 of the workpiece carrier 16, in particular the roller milling machine 30 brings the recess 18 into the top side 22 of the workpiece carrier 16. For this purpose, the roller milling machine 30 has a projection 34, as can be seen in FIG. 4.
In Fig. 5 ist schematisch eine Lackier- und Härtestation 40 dargestellt, in der die auf dem Werkstückträger 16 angeordneten Batteriezellen 14 zunächst beschichtet, insbesondere lackiert werden und anschließend die aufgebrachte Beschichtung 37, insbesondere der Lack 39 ausgehärtet wird. 5 schematically shows a painting and hardening station 40, in which the battery cells 14 arranged on the workpiece carrier 16 are first coated, in particular painted, and then the applied coating 37, in particular the paint 39, is cured.
Während des Lackierens der Batteriezellen 14 werden die Werkstückträger 16 ebenfalls mitlackiert. Um den ausgehärteten Lack 39 von den Werkstückträgem 16 zu befreien, wird der Lackier- und Härtevorrichtung 38 eine Vorrichtung 40 zum Reinigen der Werkstückträger 16 nachgeschaltet, wie dies in Fig. 5 schematisch dargestellt ist. Die Vorrichtung 40 weist die in Fig. 4 dargestellte mechanische Bearbeitungsvorrichtung 26 zum Reinigen der Werkstückträger 16 auf. Die Vorrichtung 40, insbesondere deren mechanische Bearbeitungsvorrichtung 26, welche die Walzenfräse 30 und die beiden Scheibenfräsen 32 aufweist, fräsen den Werkstückträger 16 auf die initiale Geometrie beziehungsweise Ursprungsgeometrie ab. Hierzu werden die während der Herstellung des Werkstückträgers 16 eingestellten Fräspositionen der Walzenfräse 30 und der Scheibenfräsen 32 für die mechanische Bearbeitungsvorrichtung 26 übernommen. Dadurch wird gezielt nur der anhaftende, ausgehärtete Lack 39 abgefräst, und die initiale Geometrie beziehungsweise Ursprungsgeometrie des Werkstückträgers 16 wird ohne weitere mechanische Abrasion des Werkstückträgermaterials, insbesondere des Teflonmaterials, beibehalten. While the battery cells 14 are being painted, the workpiece carriers 16 are also painted. In order to free the hardened paint 39 from the workpiece carriers 16, the painting and hardening device 38 is followed by a device 40 for cleaning the workpiece carriers 16, as shown schematically in FIG. 5. The device 40 has the mechanical processing device 26 shown in FIG. 4 for cleaning the workpiece carriers 16. The device 40, in particular its mechanical processing device 26, which has the roller milling machine 30 and the two disk milling machines 32, mills the workpiece carrier 16 to the initial geometry or original geometry. For this purpose, the milling positions of the roller milling machine 30 and the disc milling machines 32 set during the production of the workpiece carrier 16 are adopted for the mechanical processing device 26. As a result, only the adhering, hardened paint 39 is specifically milled off, and the initial geometry or original geometry of the workpiece carrier 16 is retained without further mechanical abrasion of the workpiece carrier material, in particular the Teflon material.
Nachdem die Werkstückträger 16 von dem anhaftenden, ausgehärteten Lack 39 befreit sind, können diese wieder mit neuen Batteriezellen 14 bestückt und anschließend der Lackier- und Härtestation 38 zugeführt werden, wie dies schematisch in Fig. 5 mittels der Pfeile dargestellt ist. Die Vorrichtung 40 und das Verfahren zum Reinigen des Werkstückträgers 16 zeichnen sich dadurch aus, dass der anhaftende, ausgehärtete Lack 39 gezielt abgefräst wird, indem der Werkstückträger 16 auf seine initiale Geometrie bezie- hungswiese Ursprungsgeometrie abgefräst wird. Dadurch wird die Werkstückträgergeometrie ohne weitere mechanische Abrasion des Werkstückträgermaterials beibehalten. Darüber hinaus werden der Verschleiß der Werkstückträger 16, die Kosten für das Ersatzteilmanagement sowie die Betriebskosten reduziert. After the workpiece carriers 16 have been freed from the adhering, hardened paint 39, they can be re-equipped with new battery cells 14 and then fed to the painting and hardening station 38, as shown schematically in Fig. 5 by means of the arrows. The device 40 and the method for cleaning the workpiece carrier 16 are characterized in that the adhering, hardened paint 39 is milled off in a targeted manner by milling the workpiece carrier 16 to its initial geometry or original geometry. As a result, the workpiece carrier geometry is retained without further mechanical abrasion of the workpiece carrier material. In addition, the wear of the workpiece carrier 16, the costs for spare parts management and the operating costs are reduced.
Bezugszeichenliste Reference symbol list
Fahrzeug vehicle
Batterie battery
Batteriezelle Battery cell
Gehäuse Housing
Werkstückträger Workpiece carrier
Vertiefung deepening
Pol Pole
Oberseite Top
Rohling mechanische BearbeitungsvorrichtungBlank mechanical processing device
Einzelfräse Single milling machine
Walzenfräse roller milling machine
Scheibenfräse Disc milling machine
Vorsprung Head Start
Längsseite Long side
Beschichtung Coating
Lackier- und Härtestation Painting and hardening station
Lack paint
Vorrichtung contraption

Claims

Ansprüche Verfahren zum Reinigen von Werkstückträgern (16) für die Batteriezellenlackierung, bei dem eine während der Batteriezellenlackierung auf den Werkstückträger (16) aufgebrachte Beschichtung (37) mittels einer mechanischen Bearbeitung entfernt wird. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass die Beschichtung (37) von dem Werkstückträger (16) mittels Fräsen (28) entfernt wird. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass zum Fräsen drei Einzelfräsen (28) verwendet werden. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass mit einer Einzelfräse (28) eine Oberseite (22) des Werkstückträgers (16) und mit den anderen beiden Einzelfräsen (28) die sich gegenüberliegenden Längsseiten (36) des Werkstückträgers (16) bearbeitet werden. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Werkstückträger (16) derart mechanisch bearbeitet wird, dass der Werkstückträger (16) seine vor dem Lackieren initiale Geometrie aufweist. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Werkstückträger (16) mittels der mechanischen Bearbeitung erzeugt wird, indem in einen Rohling (24) eine initiale Geometrie eingebracht wird, wobei die initiale Geometrie als Ausgangsmaß zur mechanischen Bearbeitung des Werkstückträgers (16) verwendet wird. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass in den Rohling (24) als initiale Geometrie eine Vertiefung (18) zur Aufnahme einer Batteriezelle (14) eingebracht wird. Vorrichtung (40) zum Reinigen von Werkstückträgem (16) für die Batteriezellenlackierung, aufweisend eine mechanische Bearbeitungsvorrichtung (26) zur Durchführung eines Verfahrens nach einem der Ansprüche 1 bis 7. Vorrichtung (40) nach Anspruch 8, dadurch gekennzeichnet, dass die mechanische Bearbeitungsvorrichtung (26) drei Einzelfräsen (28) aufweist. Fahrzeug (10) aufweisend eine Batterie (12) mit wenigstens einer Batteriezelle (14), die mittels eines Werkstückträgers (16) lackiert ist, der mittels eines Verfahrens nach einem der Ansprüche 1 bis 7 und/oder einer Vorrichtung (40) nach einem der Ansprüche 8 oder 9 gereinigt ist. Claims Method for cleaning workpiece carriers (16) for battery cell painting, in which a coating (37) applied to the workpiece carrier (16) during battery cell painting is removed by means of mechanical processing. Method according to claim 1, characterized in that the coating (37) is removed from the workpiece carrier (16) by means of milling (28). Method according to claim 2, characterized in that three individual milling cutters (28) are used for milling. Method according to claim 3, characterized in that an upper side (22) of the workpiece carrier (16) is machined with a single milling cutter (28) and the opposite longitudinal sides (36) of the workpiece carrier (16) are machined with the other two individual milling machines (28). Method according to one of the preceding claims, characterized in that the workpiece carrier (16) is mechanically processed in such a way that the workpiece carrier (16) has its initial geometry before painting. Method according to one of the preceding claims, characterized in that the workpiece carrier (16) is produced by means of mechanical processing by introducing an initial geometry into a blank (24), the initial geometry being used as a starting dimension for mechanical processing of the workpiece carrier (16). is used. Method according to claim 6, characterized in that a recess (18) for receiving a battery cell (14) is introduced into the blank (24) as an initial geometry. Device (40) for cleaning workpiece carriers (16) for battery cell painting, comprising a mechanical processing device (26) for carrying out a method according to one of claims 1 to 7. Device (40) according to claim 8, characterized in that the mechanical processing device ( 26) has three individual milling cutters (28). Vehicle (10) having a battery (12) with at least one battery cell (14) which is painted by means of a workpiece carrier (16) which is produced by means of a method according to one of claims 1 to 7 and/or a device (40) according to one of Claims 8 or 9 is cleaned.
PCT/EP2023/075733 2022-09-22 2023-09-19 Method for cleaning workpiece carriers for battery cell lacquering, device for cleaning workpiece carriers for battery cell lacquering, and vehicle WO2024061866A1 (en)

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EP2933058B1 (en) * 2014-04-16 2017-02-01 General Electric Company System and methods of removing a multi-layer coating from a substrate
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SE386608B (en) * 1973-02-08 1976-08-16 O C G Wennberg DEVICE FOR REMOVING COATING MATERIAL FROM THE EDGE PARTS ON A PLATE
DE2656129A1 (en) * 1975-03-02 1977-09-15 Asbjoern Moen ROTATING GRINDING OR MILLING TOOL
US5468178A (en) * 1990-02-16 1995-11-21 Kitko; Frederick A. Rotary device for removing paint from a surface
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EP2933058B1 (en) * 2014-04-16 2017-02-01 General Electric Company System and methods of removing a multi-layer coating from a substrate
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