[go: up one dir, main page]

WO2011064009A1 - Apparatus for electrolyte replacement in energy stores - Google Patents

Apparatus for electrolyte replacement in energy stores Download PDF

Info

Publication number
WO2011064009A1
WO2011064009A1 PCT/EP2010/064207 EP2010064207W WO2011064009A1 WO 2011064009 A1 WO2011064009 A1 WO 2011064009A1 EP 2010064207 W EP2010064207 W EP 2010064207W WO 2011064009 A1 WO2011064009 A1 WO 2011064009A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery cell
electrolyte
lithium
metering device
discharge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2010/064207
Other languages
German (de)
French (fr)
Inventor
Martin Tenzer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to EP10757106A priority Critical patent/EP2504877A1/en
Publication of WO2011064009A1 publication Critical patent/WO2011064009A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/691—Arrangements or processes for draining liquids from casings; Cleaning battery or cell casings
    • 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

Definitions

  • the invention it is proposed to provide a battery cell or a composite of battery cells of an energy store, in particular a lithium-ion battery, as is currently increasingly used in the motor vehicle sector, with a metering device.
  • a faster, safer and more efficient exchange of the electrolyte of a battery cell can be achieved.
  • the spent electrolyte which still has a low content of free lithium Having ions and thus has a poor conductivity are removed from the battery cell. Furthermore, the spent electrolyte contains unwanted by-products that can exert negative influences on the capacity of the battery cell.
  • the capacity of the battery cell can be raised by a new, unused electrolyte again almost to the initial level of a new battery cell.
  • By refilling electrolyte-depleted battery cells their capacity can be increased again and the internal resistance can be reduced many times over.
  • the newly introduced into the battery cell electrolyte contributes to increase the safety of the battery cell, since on the one hand minimizes the risk of the formation of metallic lithium and on the other by the renewal of the electrolyte contains no unwanted decomposition products or their concentration within the battery cell many times lower.
  • the battery cell can be adapted by filling with new electrolyte and to changing requirements. In this case it must be ensured that it is no longer the originally filled, ie the originally used, electrolyte liquid that is filled in, but also a modified electrolyte is used which is adapted to the corresponding requirements.
  • a variation of the requirements may for example be given by the fact that the battery cell is to be used in a particularly high or particularly low temperature range, or the temperature limits have shifted.
  • the figure shows a sectional view through a cylindrically shaped battery cell with E lektrolyt dosing at the bottom of the battery cell.
  • the figure shows a section through a cylindrically shaped battery cell, in particular a lithium-ion cell with an electrolyte metering device, which is provided at the bottom of the battery cell.
  • a battery cell 10 in particular a lithium-ion battery cell 10, by a wall 18, a bottom 12 and a ceiling-shaped cover 32 is limited.
  • the components mentioned enclose a space 16 in which an electrolyte 20 is accommodated.
  • the space 16 is the electrodes and the electrolyte 20 comprehensive winding of the battery.
  • a tubular insert 14 extends, which is fixed on the one hand in the ceiling-shaped cover 32 and on the other hand in the bottom 12 of the battery cell 10.
  • the insert 14 is a mandrel around which the electrode coil is wound in the manufacture of the battery cell.
  • the battery pack of the battery is accommodated, comprising anode, cathode and separator.
  • the components of the electrode coil comprising anode, cathode and separator are separated with the liquid electrolyte 20.
  • passivation layers may be formed on the surfaces of the anode and cathode.
  • the illustration according to the drawing shows that a metering device 22 is arranged in the bottom region 12.
  • the metering device 22 serves for a single or multiple replacement of the electrolyte 20.
  • the metering device 22 comprises an electrically or manually operable valve 24 which opens or closes a discharge / introduction line 26.
  • the metering device 22 comprises an electrically or manually operable valve 24 which opens or closes a discharge / introduction line 26.
  • An emptying or refilling of the space 16 of the battery cell 10, in particular a lithium-ion battery cell, as outlined above, can take place several times.
  • the replacement of the electrolyte 20 can be completed and less impurities of the old spent electrolyte 20 remain.
  • the repeated rinsing with fresh, unused electrolyte 20 can also partially remove cover layers or passivation layers which have formed in the space 16 due to the parasitic side reactions or decomposition reactions of the old, consumed electrolyte. This reduces i.a. the internal resistance of the battery cell 10 proposed according to the invention, in particular the lithium-ion battery cell 10, so that the life of the same can be decisively reduced.
  • the space 16 and the battery cell 10 can be fully cleaned by targeted discharge of impurities and byproducts several times.
  • the inventively proposed device and the inventively proposed method for replacing an electrolyte 20 of a battery cell, in particular a lithium-ion battery cell 10 by replacing the electrolyte 20 in the unopened state of the battery cell 10 by means of a metering device 22, the spent electrolyte 20, the only still a low content of free lithium Thium ions and thus has a poor conductivity, are removed from the interior, ie the space of the battery cell 10.
  • the performance of the battery cell 10 can be raised by the new electrolyte 20 again almost to the initial level of a battery cell 10 when new.
  • the capacity is increased by refilling the previously emptied space 16 with an electrolyte and the internal resistance is significantly reduced.
  • a battery cell 10 by filling with a new, unused electrolyte 20 can also be adapted to changing requirements.
  • the originally originally filled electrolyte liquid is no longer introduced, but rather a modified electrolyte electrolyte 20 deviating from its composition, which is adapted to corresponding requirements.
  • a lithium-ion battery cell 10 whose space 16 is filled with an electrolyte 20, which is adapted to a particularly high or low temperature range.
  • a composite of a plurality of interconnected battery cells 10, in particular formed as lithium-ion battery cells 10, are flushed when the metering devices 22 of each battery cell 10 to be purged are interconnected and old, spent electrolyte 20 together with impurities from several battery cells 10 can be renewed simultaneously.
  • This can be advantageously and economically also a large battery system, which includes a plurality of battery cells 10, in particular lithium-ion battery cells 10, flush with a similar effort as a single battery cell 10 and the contained, spent electrolyte 20 below Avoid opening of the respective battery cell 10 or reach the battery cells 10.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Secondary Cells (AREA)

Abstract

The invention relates to a battery cell (10) and a method for replacement of an electrolyte (20) in a battery cell (10). In particular, the battery cell (10) is a lithium-ion battery cell. This is bounded by a wall (18), a base (12) and a cover (32). The battery cell (10) has a metering device (22) for replacement of an electrolyte (20).

Description

Beschreibung  description

Titel title

Vorrichtung für Elektrolyt-Austausch bei Energiespeichern Stand der Technik  Device for electrolyte replacement in energy storage state of the art

Bei Energiespeichersystemen wie zum Beispiel heute mehr und mehr im Kraftfahrzeugbereich eingesetzten wie Lithium-Ionen-Batterien, stellt der in den Batteriezellen des Energiespeichers bevorratete Elektrolyt in Bezug auf seine Lebensdauer, seine Leistungsfähigkeit und die Sicherheit den Engpass derzeitiger Batterietypen dar. Wesentliche Alterungsmechanismen des Elektrolyten gehen auf dessen Veränderung zurück. Der Elektrolyt ändert sich zum Beispiel innerhalb der Batteriezelle, dadurch dass dieser zur Deckschichtbildung neigt und parasitäre Nebenreaktionen, die an sich unerwünscht sind, auftreten, die jedoch gleichermaßen die freien Lithium-Ionen konsumie- ren. Dadurch sinkt einerseits die verfügbare Kapazität der Batteriezelle bzw. mehrererIn energy storage systems such as today more and more used in the automotive sector such as lithium-ion batteries, stored in the battery cells of the energy storage electrolyte in terms of its life, its performance and safety is the bottleneck of current battery types. Significant aging mechanisms of the electrolyte go back to its change. The electrolyte changes, for example, within the battery cell in that it tends to form a topcoat and parasitic side reactions, which are undesirable in themselves, occur, however, the same amount of free lithium ions consume ren. This decreases the one hand, the available capacity of the battery cell or more

Batteriezellen. Zum anderen steigt der Innenwiderstand der jeweiligen Batteriezelle an, wodurch wiederum deren Leistungsfähigkeit vermindert wird. Die Zersetzungsprodukte des Elektrolyten sowie die sich bei den parasitär ablaufenden Nebenreaktionen ergebenden Reaktionsprodukte stellen zudem auch ein Sicherheitsrisiko für die Batteriezel- le dar, wenn diese beispielsweise eine geringere Siedetemperatur aufweisen sollten, als der in der Batteriezelle des Energiespeichers enthaltene Elektrolyt selbst. Battery cells. On the other hand, the internal resistance of the respective battery cell increases, which in turn reduces their performance. Moreover, the decomposition products of the electrolyte and the reaction products resulting from the parasitic side reactions also pose a safety risk for the battery cell if, for example, they should have a lower boiling temperature than the electrolyte itself contained in the battery cell of the energy accumulator.

Darstellung der Erfindung Erfindungsgemäß wird vorgeschlagen, eine Batteriezelle oder einen Verbund von Batteriezellen eines Energiespeichers, insbesondere einer Lithium-Ionen-Batterie, wie sie derzeit vermehrt im Kfz-Bereich eingesetzt wird, mit einer Dosiereinrichtung zu versehen. Mit der erfindungsgemäß vorgeschlagenen Dosiereinrichtung lässt sich ein schneller, sicherer und effizienter ablaufender Austausch des Elektrolyten einer Batte- riezelle erreichen. Durch die erfindungsgemäß vorgeschlagene Lösung kann zum einen der verbrauchte Elektrolyt, der noch einen niedrigen Gehalt an freiem Lithium- Ionen aufweist und somit eine schlechte Leitfähigkeit besitzt, aus der Batteriezelle entfernt werden. Des Weiteren enthält der verbrauchte Elektrolyt unerwünschte Nebenprodukte, die negative Einflüsse auf die Kapazität der Batteriezelle ausüben können. Zum anderen kann die Leistungsfähigkeit der Batteriezelle durch einen neuen, unverbrauchten Elektrolyten wieder nahezu auf das anfängliche Niveau einer neuen Batteriezelle angehoben werden. Durch das Wiederbefüllen von elektrolytentleerten Batteriezellen kann deren Kapazität wieder erhöht werden und der Innenwiderstand um ein vielfaches verringert werden. Des Weiteren trägt der neu in die Batteriezelle eingebrachte Elektrolyt zur Erhöhung der Sicherheit der Batteriezelle bei, da dieser zum einen die Gefahr der Bildung von metallischem Lithium minimiert und zum anderen durch die Erneuerung des Elektrolyten keine unerwünschten Zersetzungsprodukte mehr enthält bzw. deren Konzentration innerhalb der Batteriezelle um ein Vielfaches herabsetzt. DESCRIPTION OF THE INVENTION According to the invention, it is proposed to provide a battery cell or a composite of battery cells of an energy store, in particular a lithium-ion battery, as is currently increasingly used in the motor vehicle sector, with a metering device. With the metering device proposed according to the invention, a faster, safer and more efficient exchange of the electrolyte of a battery cell can be achieved. By the solution proposed by the invention, on the one hand, the spent electrolyte, which still has a low content of free lithium Having ions and thus has a poor conductivity are removed from the battery cell. Furthermore, the spent electrolyte contains unwanted by-products that can exert negative influences on the capacity of the battery cell. On the other hand, the capacity of the battery cell can be raised by a new, unused electrolyte again almost to the initial level of a new battery cell. By refilling electrolyte-depleted battery cells, their capacity can be increased again and the internal resistance can be reduced many times over. Furthermore, the newly introduced into the battery cell electrolyte contributes to increase the safety of the battery cell, since on the one hand minimizes the risk of the formation of metallic lithium and on the other by the renewal of the electrolyte contains no unwanted decomposition products or their concentration within the battery cell many times lower.

Darüber hinaus kann durch die erfindungsgemäß vorgeschlagene Lösung erreicht werden, dass die Batteriezelle durch Befüllen mit neuem Elektrolyten auch an geänderte Anforderungen angepasst werden kann. Für diesen Fall ist sicherzustellen, dass nicht mehr die ursprünglich eingefüllte, d.h. die originär verwendete Elektrolytflüssigkeit eingefüllt wird, sondern auch ein modifizierter Elektrolyt eingesetzt wird, der an die entsprechenden Anforderungen angepasst ist. Eine Variation der Anforderungen kann zum Beispiel dadurch gegeben sein, dass die Batteriezelle in einem besonders hohen oder besonders tiefen Temperaturbereich eingesetzt werden soll, beziehungsweise sich die Temperaturgrenzen verschoben haben. In addition, can be achieved by the inventively proposed solution that the battery cell can be adapted by filling with new electrolyte and to changing requirements. In this case it must be ensured that it is no longer the originally filled, ie the originally used, electrolyte liquid that is filled in, but also a modified electrolyte is used which is adapted to the corresponding requirements. A variation of the requirements may for example be given by the fact that the battery cell is to be used in a particularly high or particularly low temperature range, or the temperature limits have shifted.

Beschreibung der Zeichnungen Description of the drawings

Anhand der Zeichnung wird die Erfindung nachstehend eingehender beschrieben:With reference to the drawing, the invention will be described in more detail below:

Die Figur zeigt ein Schnittbild durch eine zylindrisch ausgebildete Batteriezelle mit E- lektrolyt-Dosiereinrichtung am Boden der Batteriezelle. The figure shows a sectional view through a cylindrically shaped battery cell with E lektrolyt dosing at the bottom of the battery cell.

Ausführungsvarianten variants

Die Figur zeigt einen Schnitt durch eine zylindrisch ausgebildete Batteriezelle, insbesondere eine Lithium-Ionen-Zelle mit einer Elektrolyt-Dosiereinrichtung, die am Boden der Batteriezelle vorgesehen ist. The figure shows a section through a cylindrically shaped battery cell, in particular a lithium-ion cell with an electrolyte metering device, which is provided at the bottom of the battery cell.

Wie aus der Zeichnung hervorgeht, ist eine Batteriezelle 10, insbesondere eine Lithium-Ionen-Batteriezelle 10, durch eine Wand 18, einen Boden 12 und eine deckeiförmige Abdeckung 32 begrenzt. Die genannten Komponenten umschließen einen Raum 16, in dem ein Elektrolyt 20 aufgenommen ist. In dem Raum 16 befindet sich der Elektroden sowie den Elektrolyt 20 umfassende Wickel der Batterie. Aus der Darstellung gemäß der Zeichnung geht hervor, dass sich durch den Raum 16 in vertikaler Richtung orientiert, ein rohrförmiger Einsatz 14 erstreckt, der einerseits in der deckeiförmigen Abdeckung 32 und andererseits im Boden 12 der Batteriezelle 10 fixiert ist. Der Einsatz 14 ist ein Dorn, um den der Elektrodenwickel bei der Herstellung der Batteriezelle gewickelt wird. As is apparent from the drawing, a battery cell 10, in particular a lithium-ion battery cell 10, by a wall 18, a bottom 12 and a ceiling-shaped cover 32 is limited. The components mentioned enclose a space 16 in which an electrolyte 20 is accommodated. In the space 16 is the electrodes and the electrolyte 20 comprehensive winding of the battery. From the illustration according to the drawing shows that oriented through the space 16 in the vertical direction, a tubular insert 14 extends, which is fixed on the one hand in the ceiling-shaped cover 32 and on the other hand in the bottom 12 of the battery cell 10. The insert 14 is a mandrel around which the electrode coil is wound in the manufacture of the battery cell.

Innerhalb des Raumes 16 ist der Batteriewickel der Batterie aufgenommen, umfassend Anode, Kathode und Separator. Within the space 16, the battery pack of the battery is accommodated, comprising anode, cathode and separator.

Die Komponenten des Elektrodenwickels, Anode, Kathode und Separator umfassend, sind mit dem flüssigen Elektrolyten 20 getrennt. Gegebenenfalls können Passivie- rungsschichten an den Oberflächen von Anode und Kathode ausgebildet sein. The components of the electrode coil comprising anode, cathode and separator are separated with the liquid electrolyte 20. Optionally, passivation layers may be formed on the surfaces of the anode and cathode.

Der Darstellung gemäß der Zeichnung ist zu entnehmen, dass im Bodenbereich 12 eine Dosiereinrichtung 22 angeordnet ist. Die Dosiereinrichtung 22 dient einem ein- oder mehrfachen Austausch des Elektrolyten 20. Dazu umfasst die Dosiereinrichtung 22 ein elektrisch oder manuell betätigbares Ventil 24, welches eine Austrags-/Eintragsleitung 26 öffnet bzw. verschließt. So kann im Falle eines Anlegens eines Unterdruckes an der Austrags-/Eintragsleitung 26 der Elektrolyt 20 aus dem Raum 16 der Batteriezelle 10 abgesaugt werden. The illustration according to the drawing shows that a metering device 22 is arranged in the bottom region 12. The metering device 22 serves for a single or multiple replacement of the electrolyte 20. For this purpose, the metering device 22 comprises an electrically or manually operable valve 24 which opens or closes a discharge / introduction line 26. Thus, in the case of applying a negative pressure at the Discharge / entry line 26 of the electrolyte 20 are sucked out of the space 16 of the battery cell 10.

Nach vollständiger Entleerung des Raums 16 kann dieser ebenfalls über die Austrags- /Eintragsleitung 26 wieder mit einem frischen, unverbrauchten Elektrolyten befüllt werden. Dieser wird durch Anlegen eines Überdruckes und Öffnen des Ventils 24 über den rohrförmigen Einsatz 14 im Raum 16 der Batteriezelle 10 eingetragen. After complete emptying of the space 16 this can also be filled via the discharge / entry line 26 again with a fresh, unused electrolyte. This is entered by applying an overpressure and opening the valve 24 via the tubular insert 14 in the space 16 of the battery cell 10.

Ein gemäß des oben stehend skizzierten Entleerens bzw. Wiederbefüllens des Raums 16 der Batteriezelle 10, insbesondere einer Lithium-Ionen-Batteriezelle, kann mehrfach erfolgen. An emptying or refilling of the space 16 of the battery cell 10, in particular a lithium-ion battery cell, as outlined above, can take place several times.

Durch ein mehrmaliges Wiederholen der oben stehend skizzierten Prozedur kann der Austausch des Elektrolyten 20 vollständig durchgeführt werden und es bleiben weniger Verunreinigungen bzw. Nebenkomponenten des alten, verbrauchten Elektrolyten 20 zurück. Darüber hinaus können durch das mehrmalige Spülen mit frischem, unverbrauchtem Elektrolyten 20 auch Deckschichten bzw. Passivierungsschichten, die sich aufgrund der parasitären Nebenreaktionen bzw. Zersetzungsreaktionen des alten, verbrauchten Elektrolyten im Raum 16 gebildet haben, teilweise abgetragen werden. Dies verringert u.a. den Innenwiderstand der erfindungsgemäß vorgeschlagenen Batteriezelle 10, insbesondere der Lithium-Ionen-Batteriezelle 10, so dass die Lebensdauer derselben entscheidend verringert werden kann. Des Weiteren lässt sich durch ein gezielt mehrfach erfolgendes Austragen von Verunreinigungen und Nebenprodukten auch dem Raum 16 und der Batteriezelle 10 dessen vollständige Reinigung erreichen. By repeating the above-outlined procedure several times, the replacement of the electrolyte 20 can be completed and less impurities of the old spent electrolyte 20 remain. In addition, the repeated rinsing with fresh, unused electrolyte 20 can also partially remove cover layers or passivation layers which have formed in the space 16 due to the parasitic side reactions or decomposition reactions of the old, consumed electrolyte. This reduces i.a. the internal resistance of the battery cell 10 proposed according to the invention, in particular the lithium-ion battery cell 10, so that the life of the same can be decisively reduced. In addition, the space 16 and the battery cell 10 can be fully cleaned by targeted discharge of impurities and byproducts several times.

Es ist denkbar, den Spülprozess sowie die gleichzeitige Erneuerung des Elektrolyten 20 als regelmäßige Wartung einer Batteriezelle 10, insbesondere einer Lithium-Ionen- Batteriezelle 10, durchzuführen. Dadurch kann die Lebensdauer der Batteriezelle 10, insbesondere ausgebildet als Lithium-Ionen-Batteriezelle 10, entscheidend, d.h. um ein Vielfaches gesteigert werden. It is conceivable to perform the rinsing process and the simultaneous renewal of the electrolyte 20 as regular maintenance of a battery cell 10, in particular a lithium-ion battery cell 10. As a result, the life of the battery cell 10, in particular formed as a lithium-ion battery cell 10, crucial, i. be increased many times over.

Durch die erfindungsgemäß vorgeschlagene Vorrichtung und das erfindungsgemäß vorgeschlagene Verfahren zum Austausch eines Elektrolyten 20 einer Batteriezelle, insbesondere einer Lithium-Ionen-Batteriezelle 10, durch Austausch des Elektrolyten 20 im ungeöffneten Zustand der Batteriezelle 10 mittels einer Dosiereinrichtung 22 kann der verbrauchte Elektrolyt 20, der nur noch einen niedrigen Gehalt an freien Li- thium-lonen und somit eine schlechte Leitfähigkeit aufweist, aus dem Inneren, d.h. dem Raum der Batteriezelle 10, entfernt werden. Zum anderen kann die Leistungsfähigkeit der Batteriezelle 10 durch den neuen Elektrolyten 20 wieder nahezu auf das anfängliche Niveau einer Batteriezelle 10 im Neuzustand angehoben werden. Die Kapazität wird durch Wiederbefüllung des zuvor entleerten Raumes 16 mit einem Elektrolyten erhöht und der Innenwiderstand entscheidend verringert. Der neue Elektrolyt 20, d.h. der in Wiederbefüllrichtung 30 durch die Austrags-/Eintragsleitung 26 in den Raum 16 eingeleitete frische Elektrolyt, trägt auch zur Erhöhung der Sicherheit der Batteriezelle 10 bzw. mehrerer miteinander verbundener Batteriezellen 10 bei, da er zum einen die Gefahr der Bildung von metallischem Lithium minimiert und zum anderen durch die Erneuerung des Elektrolyten 20 keine unerwünschten Zersetzungsprodukte mehr enthält, da dieser vorher bei mehrfachen Spülgängen, beispielsweise aus dem Raum ausgetragen wurde. By the inventively proposed device and the inventively proposed method for replacing an electrolyte 20 of a battery cell, in particular a lithium-ion battery cell 10, by replacing the electrolyte 20 in the unopened state of the battery cell 10 by means of a metering device 22, the spent electrolyte 20, the only still a low content of free lithium Thium ions and thus has a poor conductivity, are removed from the interior, ie the space of the battery cell 10. On the other hand, the performance of the battery cell 10 can be raised by the new electrolyte 20 again almost to the initial level of a battery cell 10 when new. The capacity is increased by refilling the previously emptied space 16 with an electrolyte and the internal resistance is significantly reduced. The new electrolyte 20, ie the fresh electrolyte introduced in the refilling direction 30 through the discharge / introduction line 26 into the space 16, also contributes to increasing the safety of the battery cell 10 or a plurality of interconnected battery cells 10, since on the one hand the risk of On the other hand, the renewal of the electrolyte 20 no longer contains any undesired decomposition products, since the latter has previously been discharged on multiple rinses, for example from the room.

Des Weiteren kann neben den oben stehend genannten Vorteilen durch die erfindungsgemäß vorgeschlagene Lösung eine Batteriezelle 10 durch Befüllung mit einem neuen, unverbrauchten Elektrolyten 20 auch an geänderte Anforderungen angepasst werden. In diesem Falle wird nicht mehr die ursprünglich originär eingefüllte Elektrolytflüssigkeit eingeführt, sondern eine, von deren Zusammensetzung abweichende, modifizierte Elektrolytflüssigkeit 20, die an entsprechende Anforderungen angepasst ist. So kann zum Beispiel nach Entleerung des Raumes 16 der Batteriezelle 10, insbesondere einer Lithium-Ionen-Batteriezelle 10, deren Raum 16 mit einem Elektrolyt 20 befüllt werden, der an einen besonders hohen oder tiefen Temperaturbereich angepasst ist. Furthermore, in addition to the above-mentioned advantages by the solution proposed by the invention, a battery cell 10 by filling with a new, unused electrolyte 20 can also be adapted to changing requirements. In this case, the originally originally filled electrolyte liquid is no longer introduced, but rather a modified electrolyte electrolyte 20 deviating from its composition, which is adapted to corresponding requirements. Thus, for example, after emptying the space 16 of the battery cell 10, in particular a lithium-ion battery cell 10, whose space 16 is filled with an electrolyte 20, which is adapted to a particularly high or low temperature range.

In Weiterbildung der vorstehend skizzierten erfindungsgemäßen Lösung kann auch ein Verbund von mehreren miteinander verbundenen Batteriezellen 10, insbesondere ausgebildet als Lithium-Ionen-Batteriezellen 10, gespült werden, wenn die Dosiereinrichtungen 22 einer jeden zu spülenden Batteriezelle 10 miteinander verbunden sind und alter, verbrauchter Elektrolyt 20 samt Verunreinigungen aus mehreren Batteriezellen 10 gleichzeitig erneuert werden kann. Dadurch lässt sich in vorteilhafter und ökonomischer Weise auch ein großes Batteriesystem, welches eine Vielzahl von Batteriezellen 10, insbesondere Lithium-Ionen-Batteriezellen 10, umfasst, mit einem ähnlich geringem Aufwand wie eine einzelne Batteriezelle 10 spülen bzw. der enthaltene, verbrauchte Elektrolyt 20 unter Vermeidung eines Öffnens der jeweiligen Batteriezelle 10 oder der Batteriezellen 10 erreichen. In a further development of the above-outlined solution according to the invention, a composite of a plurality of interconnected battery cells 10, in particular formed as lithium-ion battery cells 10, are flushed when the metering devices 22 of each battery cell 10 to be purged are interconnected and old, spent electrolyte 20 together with impurities from several battery cells 10 can be renewed simultaneously. This can be advantageously and economically also a large battery system, which includes a plurality of battery cells 10, in particular lithium-ion battery cells 10, flush with a similar effort as a single battery cell 10 and the contained, spent electrolyte 20 below Avoid opening of the respective battery cell 10 or reach the battery cells 10.

Claims

Ansprüche claims 1 . Batteriezelle (10), insbesondere Lithium-Ionen-Batteriezelle, die durch eine Wand (18) und einen Boden (12) begrenzt ist und durch einen Deckel (32) verschlossen ist, dadurch gekennzeichnet, dass die Batteriezelle (10) eine Dosiereinrichtung (22) zum Austausch eines Elektrolyten (20) aufweist. 1 . Battery cell (10), in particular lithium-ion battery cell, which is delimited by a wall (18) and a bottom (12) and closed by a lid (32), characterized in that the battery cell (10) has a metering device (22 ) for replacement of an electrolyte (20). 2. Batteriezelle (10) gemäß Anspruch 1 , dadurch gekennzeichnet, dass die Dosiereinrichtung (22) am Boden (12) der Batteriezelle (10) angeschlossen ist. 2. Battery cell (10) according to claim 1, characterized in that the metering device (22) is connected to the bottom (12) of the battery cell (10). 3. Batteriezelle (10) gemäß Anspruch 1 , dadurch gekennzeichnet, dass die Dosiereinrichtung (22) eine Austrags-/Eintragsleitung (26) für den Elektrolyten (20) um- fasst. 3. Battery cell (10) according to claim 1, characterized in that the metering device (22) comprises a discharge / introduction line (26) for the electrolyte (20). 4. Batteriezelle (10) gemäß Anspruch 3, dadurch gekennzeichnet, dass die Austrags- ZEintragsleitung (26) für den Elektrolyten (20) ein Abstellventil (24) umfasst. 4. battery cell (10) according to claim 3, characterized in that the discharge ZEintragsleitung (26) for the electrolyte (20) comprises a shut-off valve (24). 5. Batteriezelle (10) gemäß Anspruch 4, dadurch gekennzeichnet, dass das Abstellventil (24) manuell und/oder elektrisch betätigbar ist. 5. battery cell (10) according to claim 4, characterized in that the shut-off valve (24) is manually and / or electrically actuated. 6. Verfahren zum Austausch eines Elektrolyten (20) einer Batteriezelle (10), insbesondere einer Lithium-Ionen-Batteriezelle, dadurch gekennzeichnet, dass der Austausch des Elektrolyten (20) im ungeöffneten Zustand der Batteriezelle (10) durch eine Dosiereinrichtung (22) erfolgt. 6. A method for replacing an electrolyte (20) of a battery cell (10), in particular a lithium-ion battery cell, characterized in that the replacement of the electrolyte (20) in the unopened state of the battery cell (10) by a metering device (22) , 7. Verfahren gemäß Anspruch 6, dadurch gekennzeichnet, dass der Elektrolyt (20) durch Anlegen eines Unterdruckes an einer Austrags-/Eintragsleitung (26) aus der Batteriezelle (10) abgesaugt wird. 7. The method according to claim 6, characterized in that the electrolyte (20) is sucked out by applying a negative pressure at a discharge / entry line (26) from the battery cell (10). 8. Verfahren gemäß Anspruch 7, dadurch gekennzeichnet, dass ein unverbrauchter, neuer Elektrolyt (20) durch Anlegen eines Überdrucks an der Austrags- ZEintragsleitung (26) in die Batteriezelle (10) eingeleitet wird. 8. The method according to claim 7, characterized in that an unconsumed, new electrolyte (20) by applying an overpressure on the discharge ZEintragsleitung (26) is introduced into the battery cell (10). 9. Verfahren gemäß Anspruch 6, dadurch gekennzeichnet, dass Austausch des E- lektrolyten (20) mehrmals hintereinander im Rahmen eines Spülzykluses erfolgt. 9. The method according to claim 6, characterized in that replacement of the e- lektrolyten (20) takes place several times in succession in the context of a rinsing cycle. 10. Verfahren gemäß Anspruch 6, dadurch gekennzeichnet, dass durch mehrfaches Spülen der Batteriezelle (10) mit neuem, unverbrauchten Elektrolyten (20) Deckschichten und Passivierungsschichten aus einem Raum (16) der Batteriezelle (10) teilweise oder vollständig ausgetragen werden. 10. The method according to claim 6, characterized in that by repeatedly rinsing the battery cell (10) with new, unused electrolyte (20) cover layers and passivation layers from a space (16) of the battery cell (10) are partially or completely discharged. 1 1 . Verfahren gemäß Anspruch 6, dadurch gekennzeichnet, dass die Dosiereinrichtungen (22) mehrerer Batteriezellen (10) miteinander verbunden werden und Elektrolyt (20) mehrerer Batteriezellen (10) gleichzeitig ausgetauscht wird. 1 1. A method according to claim 6, characterized in that the metering devices (22) of a plurality of battery cells (10) are interconnected and electrolyte (20) of a plurality of battery cells (10) is replaced simultaneously. 12. Verfahren gemäß Anspruch 9, dadurch gekennzeichnet, dass der Spülprozess sowie die gleichzeitige Erneuerung des Elektrolyten (20) als regelmäßige Wartung einer Lithium-Ionen-Batteriezelle (10) durchgeführt wird. 12. The method according to claim 9, characterized in that the rinsing process and the simultaneous renewal of the electrolyte (20) as a regular maintenance of a lithium-ion battery cell (10) is performed.
PCT/EP2010/064207 2009-11-24 2010-09-27 Apparatus for electrolyte replacement in energy stores Ceased WO2011064009A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10757106A EP2504877A1 (en) 2009-11-24 2010-09-27 Apparatus for electrolyte replacement in energy stores

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009047057A DE102009047057A1 (en) 2009-11-24 2009-11-24 Device for electrolyte replacement in energy storage
DE102009047057.3 2009-11-24

Publications (1)

Publication Number Publication Date
WO2011064009A1 true WO2011064009A1 (en) 2011-06-03

Family

ID=43078260

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/064207 Ceased WO2011064009A1 (en) 2009-11-24 2010-09-27 Apparatus for electrolyte replacement in energy stores

Country Status (3)

Country Link
EP (1) EP2504877A1 (en)
DE (1) DE102009047057A1 (en)
WO (1) WO2011064009A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3442052A4 (en) * 2017-06-07 2019-05-08 LG Chem, Ltd. ELECTROLYTE REINJECTION BATTERY ELEMENT, BATTERY PACK, ELECTROLYTE REINJECTION SYSTEM FOR BATTERY PACK AND ELECTROLYTE REINJECTION METHOD FOR BATTERY PACK
CN112886155A (en) * 2021-03-15 2021-06-01 贵州中瑞丰泰新能源科技有限公司 Battery structure with liquid injection from bottom and battery liquid injection method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011088682A1 (en) * 2011-12-15 2013-06-20 Robert Bosch Gmbh Electrolyte fluid metering device for lithium cells
GB2522395A (en) * 2013-08-30 2015-07-29 Nicoventures Holdings Ltd Recharging apparatus
DE102014221300A1 (en) 2014-10-21 2016-04-21 Robert Bosch Gmbh Apparatus and method for removing particles from battery cells
DE102022103025A1 (en) 2022-02-09 2023-08-10 Volkswagen Aktiengesellschaft Battery cell and method for filling such a battery cell

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992015120A1 (en) * 1991-02-14 1992-09-03 Jones William E M Apparatus for recirculation of battery electrolyte and method of using same
US20020076604A1 (en) * 2000-12-20 2002-06-20 Honda Giken Kogyo Kabushiki Kaisha Charging element device and holding structure therefor
DE102005004843A1 (en) * 2005-02-02 2006-08-03 Otto Altmann Battery, e.g. lead-acid battery for motor vehicle, has battery sludge removing device with battery sludge containment component which returns cleaned electrolyte into electrolyte container
DE102007023896A1 (en) * 2007-05-23 2008-11-27 Robert Bosch Gmbh Electrochemical energy storage and method for its operation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992015120A1 (en) * 1991-02-14 1992-09-03 Jones William E M Apparatus for recirculation of battery electrolyte and method of using same
US20020076604A1 (en) * 2000-12-20 2002-06-20 Honda Giken Kogyo Kabushiki Kaisha Charging element device and holding structure therefor
DE102005004843A1 (en) * 2005-02-02 2006-08-03 Otto Altmann Battery, e.g. lead-acid battery for motor vehicle, has battery sludge removing device with battery sludge containment component which returns cleaned electrolyte into electrolyte container
DE102007023896A1 (en) * 2007-05-23 2008-11-27 Robert Bosch Gmbh Electrochemical energy storage and method for its operation

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3442052A4 (en) * 2017-06-07 2019-05-08 LG Chem, Ltd. ELECTROLYTE REINJECTION BATTERY ELEMENT, BATTERY PACK, ELECTROLYTE REINJECTION SYSTEM FOR BATTERY PACK AND ELECTROLYTE REINJECTION METHOD FOR BATTERY PACK
US11081765B2 (en) 2017-06-07 2021-08-03 Lg Chem, Ltd. Battery cell refillable with electrolyte, battery pack, electrolyte refilling system for battery pack, and electrolyte refilling method for battery pack
CN112886155A (en) * 2021-03-15 2021-06-01 贵州中瑞丰泰新能源科技有限公司 Battery structure with liquid injection from bottom and battery liquid injection method
WO2022193858A1 (en) * 2021-03-15 2022-09-22 贵州中瑞丰泰新能源科技有限公司 Battery structure allowing for liquid injection from the bottom and method for liquid injection of battery
CN112886155B (en) * 2021-03-15 2023-10-20 贵州中瑞丰泰新能源科技有限公司 Battery structure capable of injecting liquid from bottom and battery liquid injection method

Also Published As

Publication number Publication date
EP2504877A1 (en) 2012-10-03
DE102009047057A1 (en) 2011-05-26

Similar Documents

Publication Publication Date Title
WO2011064009A1 (en) Apparatus for electrolyte replacement in energy stores
EP2901514B1 (en) Method for filling electrochemical cells
DE112013002593T5 (en) Lithium-ion batteries are multi-cell
DE102010052397A1 (en) Method and device for filling an electrochemical cell
DE102012222516A1 (en) Battery discharge for motor vehicle batteries
WO2008145450A1 (en) Electrochemical energy storage unit having a storage container for an additive
DE102018204522A1 (en) Method of manufacturing a bipolar battery cell stack
DE2725738C2 (en) Process for storing chlorine and chlorine accumulators developed during the recharging phase of a chlorine accumulator and to be used during the discharge phase for carrying out this process
EP2141264B1 (en) Apparatus for producing an oxygen/hydrogen mixture
DE102018130190B4 (en) Method for regenerating a lead accumulator arrangement
EP3961787A1 (en) Battery with liquid electrolyte, in particular a lead battery
DE2431208C3 (en) Process for the manufacture of a dry-charged lead-acid battery
DE102021204659A1 (en) High-voltage battery system
DE102024205833B3 (en) Process for regenerating an electrolysis cell
DE102010048983A1 (en) Battery unit e.g. lead battery, for e.g. electric wheel chair, has band-shaped fleece movably arranged relative to electrodes and circularly movable by mechanical adjusting unit, where pathway of fleece encloses interior of storage tank
DE10164300A1 (en) Method and device for regenerating zinc electrodes
DE282466C (en)
DE112012000639T5 (en) lead-acid battery
WO2024208394A1 (en) Method for producing a battery cell and battery cell
DE212023000311U1 (en) Device for injecting electrolyte
DE102022133259A1 (en) Process for producing a battery cell
DE102021202303A1 (en) Process for manufacturing a power cell and power cell
DE102011121851A1 (en) Battery i.e. lithium ion battery, discharging device for e.g. electric vehicle, has battery housing including openings and/or preset breaking points, which are formed such that battery interior is filled and/or flushed with medium
DE102010020917A1 (en) Lead-acid battery unit for use as e.g. buffer battery, in e.g. electrical passenger car, has electrodes arranged over mechanically adjustable unit such that consumed electrode material are replaced by unconsumed electrode material
WO2016012568A1 (en) Method for producing a prismatic battery cell

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10757106

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2010757106

Country of ref document: EP