DE102019109703A1 - Arrangement for quality inspection of a battery cell - Google Patents

Arrangement for quality inspection of a battery cell Download PDF

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DE102019109703A1
DE102019109703A1 DE102019109703.7A DE102019109703A DE102019109703A1 DE 102019109703 A1 DE102019109703 A1 DE 102019109703A1 DE 102019109703 A DE102019109703 A DE 102019109703A DE 102019109703 A1 DE102019109703 A1 DE 102019109703A1
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battery cell
outer skin
space
arrangement according
arrangement
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Justus Speichermann
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Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche AG
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Priority to DE102019109703.7A priority Critical patent/DE102019109703A1/en
Priority to CN202010054131.3A priority patent/CN111816944A/en
Priority to KR1020200036562A priority patent/KR102426321B1/en
Publication of DE102019109703A1 publication Critical patent/DE102019109703A1/en
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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
    • 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
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/1717—Systems in which incident light is modified in accordance with the properties of the material investigated with a modulation of one or more physical properties of the sample during the optical investigation, e.g. electro-reflectance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
    • G01N21/81—Indicating humidity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/385—Arrangements for measuring battery or accumulator variables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/385—Arrangements for measuring battery or accumulator variables
    • G01R31/3865—Arrangements for measuring battery or accumulator variables related to manufacture, e.g. testing after manufacture
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4285—Testing apparatus
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/488—Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density
    • 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
    • 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
    • H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/1717—Systems in which incident light is modified in accordance with the properties of the material investigated with a modulation of one or more physical properties of the sample during the optical investigation, e.g. electro-reflectance
    • G01N2021/1725—Modulation of properties by light, e.g. photoreflectance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N2021/7769—Measurement method of reaction-produced change in sensor
    • G01N2021/7773—Reflection
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
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  • Plasma & Fusion (AREA)
  • Secondary Cells (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

Die Erfindung schlägt eine Anordnung zur Qualitätsprüfung einer Batteriezelle (1) vor.Die Batteriezelle (1) weist eine aus zwei miteinander versiegelten Folien gebildete Außenhaut und, innerhalb eines von der Außenhaut umschlossenen Raumes, eine Anode-Elektrode, eine Kathode-Elektrode, einen die beiden Elektroden trennenden Separator und einen ionenleitfähigen Elektrolyt auf. Eine mit der Anode-Elektrode verbundene Anschlussfahne (2) und eine mit der Kathode-Elektrode verbundene Anschlussfahne (3) durchragen eine Siegelnaht. Innerhalb des von der Außenhaut umschlossenen Raums, in einem transparenten Bereich der Außenhaut, ist eine Vorrichtung (4) angeordnet, die unter Anwesenheit einer vorbestimmten Fluorwasserstoff-Konzentration in diesem Raum das optische Erscheinungsbild ändert. Außerhalb der Außenhaut ist eine optoelektronische Vorrichtung (5) zum Erfassen des optischen Erscheinungsbildes angeordnet ist.The invention proposes an arrangement for checking the quality of a battery cell (1). The battery cell (1) has an outer skin formed from two foils sealed together and, within a space enclosed by the outer skin, an anode electrode, a cathode electrode, a Separator separating the two electrodes and an ion-conductive electrolyte. A connecting lug (2) connected to the anode electrode and a connecting lug (3) connected to the cathode electrode protrude through a sealed seam. Within the space enclosed by the outer skin, in a transparent area of the outer skin, a device (4) is arranged which changes the visual appearance in the presence of a predetermined hydrogen fluoride concentration in this space. An optoelectronic device (5) for detecting the optical appearance is arranged outside the outer skin.

Description

Die Erfindung betrifft eine Anordnung zur Qualitätsprüfung einer Batteriezelle.The invention relates to an arrangement for checking the quality of a battery cell.

Bei einer solchen Batteriezelle handelt es sich insbesondere um eine Batteriezelle zur Verwendung bei einer Traktionsbatterie. In der DE 10 2013 016 618 A1 ist eine Batteriezelle beschrieben, die eine aus zwei miteinander versiegelten Folien gebildete Außenhaut und, innerhalb eines von der Außenhaut umschlossenen Raums, eine Anode-Elektrode, eine Kathode-Elektrode, einen die beiden Elektroden trennenden Separator und einen ionenleitfähigen Elektrolyt aufweist. Hierbei durchragen eine mit der Anode-Elektrode verbundene Anschlussfahne und eine mit der Kathode-Elektrode verbundene Anschlussfahne eine beim Versiegeln der Folien gebildete Siegelnaht. Bei dieser Batteriezelle handelt es sich insbesondere um eine Pouch-Zelle.Such a battery cell is in particular a battery cell for use in a traction battery. In the DE 10 2013 016 618 A1 describes a battery cell which has an outer skin formed from two foils sealed together and, within a space enclosed by the outer skin, an anode electrode, a cathode electrode, a separator separating the two electrodes and an ion-conductive electrolyte. Here, a connection lug connected to the anode electrode and a connection lug connected to the cathode electrode protrude through a sealing seam formed when the foils are sealed. This battery cell is in particular a pouch cell.

Aus der DE 197 02 855 A1 ist es bekannt, bei einer elektrochemischen Zelle den Flüssigkeitsstand innerhalb der Zelle mittels eines optischen Sensors zu bestimmen. Dieser ist innerhalb der Zelle angeordnet.From the DE 197 02 855 A1 it is known to determine the liquid level within the cell in an electrochemical cell by means of an optical sensor. This is arranged inside the cell.

Aus der US 2015/0303723 A1 ist ein faseroptischer Sensor zur Feststellung des Ladezustands einer Batterie bekannt.From the US 2015/0303723 A1 a fiber optic sensor for determining the state of charge of a battery is known.

In der US 5 681 666 A ist ein Batterietester beschrieben, der eine feuchtigkeitsabweisende Schutzeinrichtung mit visuellen Mitteln zur Anzeige eines Batteriezustands aufweist.In the U.S. 5,681,666 A a battery tester is described which has a moisture-repellent protective device with visual means for displaying a battery status.

Batteriezellen, insbesondere Lithium-Ionen-Zellen, werden als Energiespeicher in der Elektromobilität zunehmend eingesetzt. Die eingesetzten Materialien im Produkt sind feuchtigkeitsempfindlich. Ein zu hoher Feuchtigkeitsgehalt in den Materialien kann zu unerwünschten Reaktionen führen, wie zum Beispiel der Bildung von Fluorwasserstoff (HF). Dies kann in der Folge zu einer Nichterfüllung der technischen Spezifikationen der Batteriezellen führen. Battery cells, especially lithium-ion cells, are increasingly being used as energy stores in electromobility. The materials used in the product are sensitive to moisture. Too high a moisture content in the materials can lead to undesirable reactions, such as the formation of hydrogen fluoride (HF). As a result, this can lead to the technical specifications of the battery cells not being met.

Aufgabe der vorliegenden Erfindung ist es, eine Anordnung anzugeben, mit der eine zerstörungsfreie Qualitätsprüfung einer Batteriezelle gewährleistet ist.The object of the present invention is to provide an arrangement with which a non-destructive quality test of a battery cell is ensured.

Gelöst wird die Aufgabe durch eine Anordnung, die die Merkmale des Patentanspruchs 1 aufweist.The object is achieved by an arrangement which has the features of claim 1.

Die erfindungsgemäße Anordnung dient der Qualitätsprüfung einer Batteriezelle. Diese weist eine aus zwei miteinander versiegelten Folien gebildete Außenhaut und, innerhalb eines von der Außenhaut umschlossenen Raums, eine Anode-Elektrode, eine Kathode-Elektrode, einen die beiden Elektroden trennenden Separator und einen ionenleitfähigen Elektrolyt auf. Hierbei durchragen eine mit der Anode-Elektrode verbundene Anschlussfahne und eine mit der Kathode-Elektrode verbundene Anschlussfahne die beim Versiegeln gebildete Siegelnaht. Innerhalb des von der Außenhaut umschlossenen Raumes, und zwar in einem transparenten Bereich der Außenhaut, ist eine Vorrichtung angeordnet, die unter Anwesenheit einer vorbestimmten Fluorwasserstoff-Konzentration in diesem Raum das optische Erscheinungsbild ändert. Außerhalb der Außenhaut ist eine optoelektronische Vorrichtung zum Erfassen des optischen Erscheinungsbildes der im umschlossenen Raum angeordneten Vorrichtung angeordnet.The arrangement according to the invention is used to check the quality of a battery cell. This has an outer skin formed from two foils sealed with one another and, within a space enclosed by the outer skin, an anode electrode, a cathode electrode, a separator separating the two electrodes and an ion-conductive electrolyte. Here, a connection lug connected to the anode electrode and a connection lug connected to the cathode electrode protrude through the sealing seam formed during sealing. Within the space enclosed by the outer skin, namely in a transparent area of the outer skin, a device is arranged which changes the visual appearance in the presence of a predetermined hydrogen fluoride concentration in this space. An optoelectronic device for detecting the optical appearance of the device arranged in the enclosed space is arranged outside the outer skin.

Bei der Batteriezelle handelt es sich vorzugsweise um eine Lithium-Ionen-Zelle.The battery cell is preferably a lithium-ion cell.

Bei der Batteriezelle handelt es sich ferner vorzugsweise um eine Pouch-Zelle.The battery cell is also preferably a pouch cell.

Es ist insbesondere vorgesehen, dass die innerhalb des Raums angeordnete Vorrichtung nahe der Siegelnaht angeordnet ist. Diese Vorrichtung ist somit in einem Bereich des von der Außenhaut umschlossenen Raumes positioniert, der einen Randbereich der Batteriezelle, bezogen auf die innerhalb des Raumes angeordneten Komponenten, nämlich die beiden Elektroden und den Separator dargestellt. In diesem Randbereich lagert sich bei der Bildung von Fluorwasserstoff dieser bevorzugt an und kann somit besonders geeignet mittels der externen optoelektronischen Vorrichtung detektiert werden.It is provided in particular that the device arranged within the space is arranged near the sealing seam. This device is thus positioned in a region of the space enclosed by the outer skin, which represents an edge region of the battery cell in relation to the components arranged within the space, namely the two electrodes and the separator. In this edge area, when hydrogen fluoride is formed, it is preferably deposited and can therefore be detected particularly suitably by means of the external optoelectronic device.

Bei der innerhalb des Raums angeordneten Vorrichtung handelt es sich vorzugsweise um einen Glasstift oder ein Lithium-Metallblättchen. Diese sind besonders geeignet, sich unter Anwesenheit einer vorbestimmten Fluorwasserstoff-Konzentration das optische Erscheinungsbild zu ändern.The device arranged within the space is preferably a glass pen or a lithium metal sheet. These are particularly suitable for changing the visual appearance in the presence of a predetermined hydrogen fluoride concentration.

Die innerhalb des Raums angeordnete Vorrichtung ist vorzugsweise derart gestaltet, dass diese Vorrichtung unter der Anwesenheit einer vorbestimmten, kritischen Fluorwasserstoff-Konzentration ihr optisches Erscheinungsbild irreversibel verändert.The device arranged within the room is preferably designed in such a way that this device irreversibly changes its optical appearance in the presence of a predetermined, critical hydrogen fluoride concentration.

Bei der optoelektronischen Vorrichtung handelt es sich insbesondere um eine Vorrichtung zum Messen einer Veränderung eines Reflexionsvermögens der innerhalb des Raums angeordneten Vorrichtung.The optoelectronic device is in particular a device for measuring a change in a reflectivity of the device arranged within the room.

Die optoelektronische Vorrichtung erfasst vorzugsweise den Status des optischen Erscheinungsbildes elektrisch oder elektronisch.The optoelectronic device preferably detects the status of the optical appearance electrically or electronically.

Insbesondere ist ein Analysesystem vorgesehen, zum Auswerten des Status als Qualitätsprüfung und/oder Qualitätsstatus.In particular, an analysis system is provided for evaluating the status as a quality check and / or quality status.

Die erfindungsgemäße Anordnung ermöglicht somit eine zerstörungsfreie Prüfung. Diese erfolgt direkt, schnell, eindeutig und damit prozesssicher. Das Ergebnis ist zeitnah verfügbar.The arrangement according to the invention thus enables non-destructive testing. This is done directly, quickly, clearly and therefore reliably. The result is available promptly.

Weitere Merkmale der Erfindung ergeben sich aus den Unteransprüchen, der beigefügten Zeichnung und der Beschreibung des in der Zeichnung wiedergegebenen Ausführungsbeispiels, ohne hierauf beschränkt zu sein.Further features of the invention emerge from the dependent claims, the attached drawing and the description of the exemplary embodiment shown in the drawing, without being restricted thereto.

Es zeigt:

  • 1 in einer schematischen Darstellung eine Anordnung zur Qualitätsprüfung einer Batteriezelle.
It shows:
  • 1 in a schematic representation an arrangement for quality testing of a battery cell.

FigurenbeschreibungFigure description

Veranschaulicht ist eine Batteriezelle 1, bei der es sich um eine Lithium-Ionen-Zelle, die als Pouch-Zelle ausgebildet ist, handelt. In bekannter Art und Weise weist die Batteriezelle 1 eine aus zwei miteinander versiegelten Folien gebildete Außenhaut und innerhalb eines von der Außenhaut umschlossenen Raumes eine Anode-Elektrode, eine Kathode-Elektrode, einen die beiden Elektroden trennenden Separator und ein ionenleitfähigen Elektrolyt auf. Eine mit der Anode-Elektrode verbundene Anschlussfahne 2 und eine mit der Kathode-Elektrode verbundene Anschlussfahne 3 durchragt die Außenhaut, insbesondere im Bereich einer Siegelnaht, die im Bereich der miteinander versiegelten Folien gebildet ist.A battery cell is illustrated 1 , which is a lithium-ion cell designed as a pouch cell. In a known manner, the battery cell 1 an outer skin formed from two foils sealed to one another and, within a space enclosed by the outer skin, an anode electrode, a cathode electrode, a separator separating the two electrodes and an ion-conductive electrolyte. A terminal lug connected to the anode electrode 2 and a terminal lug connected to the cathode electrode 3 extends through the outer skin, in particular in the area of a sealing seam which is formed in the area of the foils sealed to one another.

Innerhalb des von der Außenhaut umschlossenen Raums, in einem transparenten Bereich der Außenhaut, ist eine Vorrichtung 4 angeordnet. Diese ändert unter Anwesenheit einer vorbestimmten Fluorwasserstoff-Konzentration in dem Raum das optische Erscheinungsbild. Die Vorrichtung 4 ist nahe der Siegelnaht angeordnet. Bei dieser Vorrichtung 4 handelt es sich um einen Glasstift oder ein Lithium-Metallblättchen. Die Vorrichtung 4 ist derart ausgebildet, dass sie unter der Anwesenheit einer vorbestimmten, kritischen Fluorwasserstoff-Konzentration ihr optisches Erscheinungsbild irreversibel verändert.A device is located within the space enclosed by the outer skin, in a transparent area of the outer skin 4th arranged. This changes the visual appearance in the presence of a predetermined hydrogen fluoride concentration in the room. The device 4th is arranged near the sealing seam. With this device 4th it is a glass pen or a lithium metal sheet. The device 4th is designed in such a way that it irreversibly changes its visual appearance in the presence of a predetermined, critical hydrogen fluoride concentration.

Außerhalb der Außenhaut, somit der Batteriezelle 1, ist eine optoelektronische Vorrichtung 5 zum Erfassen des optischen Erscheinungsbildes der im Raum befindlichen Vorrichtung 4 angeordnet.Outside the outer skin, thus the battery cell 1 , is an optoelectronic device 5 for detecting the optical appearance of the device located in the room 4th arranged.

Die Vorrichtung 5 ist eine Vorrichtung zum Messen einer Veränderung eines Reflexionsvermögens der Vorrichtung 4. Die Vorrichtung 5 übermittelt den erfassten Status des optischen Erscheinungsbilds elektrisch oder elektronisch zu einem Analysesystem 6, zum dortigen Auswerten des Status als Qualitätsprüfung und/oder Qualitätsstatus.The device 5 is an apparatus for measuring a change in reflectance of the apparatus 4th . The device 5 transmits the recorded status of the visual appearance electrically or electronically to an analysis system 6th , to evaluate the status there as a quality inspection and / or quality status.

Die zerstörungsfreie Prüfung der Batteriezelle 1 erfolgt somit direkt, schnell, eindeutig und demnach prozesssicher. Das Ergebnis ist zeitnah verfügbar.The non-destructive testing of the battery cell 1 thus takes place directly, quickly, clearly and therefore reliably. The result is available promptly.

ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDED 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 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

  • DE 102013016618 A1 [0002]DE 102013016618 A1 [0002]
  • DE 19702855 A1 [0003]DE 19702855 A1 [0003]
  • US 2015/0303723 A1 [0004]US 2015/0303723 A1 [0004]
  • US 5681666 A [0005]US 5681666 A [0005]

Claims (9)

Anordnung zur Qualitätsprüfung einer Batteriezelle (1), wobei die Batteriezelle (1) eine aus zwei miteinander versiegelten Folien gebildete Außenhaut und, innerhalb eines von der Außenhaut umschlossenen Raumes, eine Anode-Elektrode, eine Kathode-Elektrode, einen die beiden Elektroden trennenden Separator und einen ionenleitfähigen Elektrolyt aufweist, wobei eine mit der Anode-Elektrode verbundene Anschlussfahne (2) und eine mit der Kathode-Elektrode verbundene Anschlussfahne (3) eine im Bereich der miteinander versiegelten Folien gebildete Siegelnaht durchragen, wobei innerhalb des von der Außenhaut umschlossenen Raums, in einem transparenten Bereich der Außenhaut, eine Vorrichtung (4) angeordnet ist, die unter Anwesenheit einer vorbestimmten Fluorwasserstoff-Konzentration in diesem Raum das optische Erscheinungsbild ändert, sowie außerhalb der Außenhaut eine optoelektronische Vorrichtung (5) zum Erfassen des optischen Erscheinungsbildes angeordnet ist.Arrangement for quality inspection of a battery cell (1), wherein the battery cell (1) has an outer skin formed from two foils sealed together and, within a space enclosed by the outer skin, an anode electrode, a cathode electrode, a separator and separator has an ion-conductive electrolyte, a connection lug (2) connected to the anode electrode and a connection lug (3) connected to the cathode electrode protruding through a sealing seam formed in the area of the sealed foils, with in the space enclosed by the outer skin in a transparent area of the outer skin, a device (4) is arranged which changes the optical appearance in the presence of a predetermined hydrogen fluoride concentration in this space, and an optoelectronic device (5) for detecting the optical appearance is arranged outside the outer skin. Anordnung nach Anspruch 1, wobei die Batteriezelle (1) eine Lithium-Ionen-Zelle ist.Arrangement according to Claim 1 , wherein the battery cell (1) is a lithium-ion cell. Anordnung nach Anspruch 1 oder 2, wobei die Batteriezelle (1) eine Pouch-Zelle ist.Arrangement according to Claim 1 or 2 , wherein the battery cell (1) is a pouch cell. Batteriezelle nach einem der Ansprüche 1 bis 3, wobei die innerhalb des Raums angeordnete Vorrichtung (4) nahe der Siegelnaht angeordnet ist.Battery cell according to one of the Claims 1 to 3 , wherein the device (4) arranged within the space is arranged near the sealing seam. Anordnung nach einem der Ansprüche 1 bis 4, wobei die innerhalb des Raums angeordnete Vorrichtung (4) ein Glasstift oder ein Lithium-Metallblättchen ist.Arrangement according to one of the Claims 1 to 4th wherein the device (4) arranged within the space is a glass stick or a lithium metal flake. Anordnung nach einem der Ansprüche 1 bis 5, wobei die innerhalb des Raums angeordnete Vorrichtung (4) derart ausgestaltet ist, dass diese Vorrichtung (4) unter der Anwesenheit einer vorbestimmten, kritischen Fluorwasserstoff-Konzentration ihr optisches Erscheinungsbild irreversibel verändert.Arrangement according to one of the Claims 1 to 5 wherein the device (4) arranged within the space is designed in such a way that this device (4) irreversibly changes its optical appearance in the presence of a predetermined, critical hydrogen fluoride concentration. Batteriezelle nach einem der Ansprüche 1 bis 6, wobei die optoelektronische Vorrichtung (5) eine Vorrichtung zum Messen einer Veränderung eines Reflexionsvermögens der innerhalb des Raums angeordneten Vorrichtung (4) ist.Battery cell according to one of the Claims 1 to 6th wherein the optoelectronic device (5) is a device for measuring a change in a reflectivity of the device (4) arranged within the room. Batteriezelle nach einem der Ansprüche 1 bis 7, wobei die optoelektronische Vorrichtung (5) den erfassten Status des optischen Erscheinungsbilds elektrisch oder elektronisch übermittelt.Battery cell according to one of the Claims 1 to 7th , wherein the optoelectronic device (5) transmits the detected status of the optical appearance electrically or electronically. Anordnung nach Anspruch 8, wobei ein Analysesystem (6) vorgesehen ist, zum Auswerten des Status als Qualitätsprüfung und/oder Qualitätsstatus.Arrangement according to Claim 8 , wherein an analysis system (6) is provided for evaluating the status as a quality check and / or quality status.
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