WO2019101797A1 - Method for producing an electrochemical energy storage cell, energy storage cell, battery module and vehicle - Google Patents

Method for producing an electrochemical energy storage cell, energy storage cell, battery module and vehicle Download PDF

Info

Publication number
WO2019101797A1
WO2019101797A1 PCT/EP2018/082089 EP2018082089W WO2019101797A1 WO 2019101797 A1 WO2019101797 A1 WO 2019101797A1 EP 2018082089 W EP2018082089 W EP 2018082089W WO 2019101797 A1 WO2019101797 A1 WO 2019101797A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
housing
energy storage
storage cell
pressure sensor
Prior art date
Application number
PCT/EP2018/082089
Other languages
German (de)
French (fr)
Inventor
Jan Philipp Schmidt
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 WO2019101797A1 publication Critical patent/WO2019101797A1/en

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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
    • 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
    • H01M10/44—Methods for charging or discharging
    • H01M10/445—Methods for charging or discharging in response to gas pressure
    • 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
    • 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 of a single cell or a single battery
    • H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
    • H01M50/103—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure prismatic or rectangular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/20—Pressure-sensitive devices
    • 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
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • 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 relates to a method for producing an electrochemical energy storage cell, an electrochemical energy storage cell, a battery module and a vehicle.
  • Electrochemical energy storage cells such as lithium-ion cells, are of major importance in the field of so-called electromobility, both in vehicles with pure electric drive and in vehicles with hybrid drive, because of their high energy densities in comparison to energy storage cells of a different type.
  • electronic protective circuits can be used.
  • the energy storage cells are monitored during operation by means of a temperature or pressure sensor.
  • a method according to the invention for producing an electrochemical energy storage cell has the following steps:
  • An electrochemical energy storage cell comprises a housing, a pressure sensor, which is arranged in the housing and adapted to detect a pressure and to generate a corresponding sensor signal, and a data storage device, which is arranged in the housing and in which a characteristic of the pressure sensor the characteristic of the pressure sensor indicates a relationship between at least one sensor signal generated by the pressure sensor when detecting at least one pressure within the housing and the pressure value of the at least one pressure within the housing.
  • a battery module according to the invention has a plurality of inventive electrochemical energy storage cells.
  • a vehicle according to the invention in particular a motor vehicle, has at least one electrochemical energy storage cell according to the invention and / or a battery module according to the invention.
  • One aspect of the invention is based on the approach of calibrating a pressure sensor which during operation detects the internal pressure of the energy storage cell during the production process in the energy storage cell by generating different pressures with known pressure values in the interior of the energy storage cell Pressure sensor respectively generated sensor signals are detected. Based on pairs of values composed of a pressure value and the corresponding sensor signal, a characteristic curve is formed which describes the relationship between pressure values of pressures prevailing in the interior of the energy storage cell on the one hand and corresponding sensor signals on the other hand. Since the characteristic curve is determined in situ, ie only after the pressure sensor has been introduced into the cell during the production process of the cell.
  • the pressure value, ie the height, of the currently prevailing pressure in the cell can be determined with high accuracy on the basis of the sensor signal generated in each case and the characteristic curve of the pressure sensor.
  • the state of charge of an energy storage cell can be influenced by charges supplied or removed from the outside via current collectors, for example by an electrical power source or an electrical consumer at each a current collector, which in turn are each connected to the cathode and the anode of the energy storage cell, is applied or connected.
  • the invention allows an increase in reliability in the monitoring of energy storage cells.
  • the at least one predetermined pressure is generated during filling of the housing with an electrolyte. This allows a calibration of the pressure sensor during a step anyway required in the production process of the electrochemical energy storage cell, so that no additional time or only slightly more time is required for the calibration.
  • the at least one predetermined pressure is generated after an inflation of the housing with an electrolyte, in particular during and / or after an electrical charging of the energy storage cell, by an external pressure generating device.
  • the calibration of the pressure sensor also takes place here during the production process of the cell, preferably before the cell is closed and / or before the so-called formation.
  • the pressure conditions in the cell are particularly stable, so that the relationship between different pressures on the one hand and sensor signals on the other hand can be detected particularly accurately. If the cell is being charged at this time and / or already at least partially charged, the pressure sensor via a charging power supply or by the cell itself can be supplied with electrical energy without additional measures to power the sensor are required. This ensures that no additional time or only slightly more time is required for the calibration.
  • the pressure sensor is supplied with electrical energy by the electrochemical energy storage cell itself or by an external supply device.
  • Supplying the pressure sensor with electrical energy through the energy storage cell ensures that the pressure sensor is self-sufficient and thus can be operated both during calibration and during operation of the energy storage cell without additional connection to an external energy supply device.
  • An external supply device offers the advantage that the pressure sensor can already be supplied with power and calibrated during the production process of the energy storage cell if the cell is not yet or not yet sufficiently charged.
  • the pressure sensor is or is arranged on a bursting membrane provided on the housing, which is adapted to break upon reaching or exceeding a bursting pressure within the housing and to allow escape of, in particular gaseous, electrolyte from the housing.
  • the pressure sensor detects the at least one predetermined pressure within the housing by detecting at least one strain of the bursting membrane.
  • the bursting membrane which is also called a burst disc, is due to its material and its dimensions is adapted to elastically deform within a certain pressure range below the bursting pressure, wherein the amount of deformation is a measure of the pressure prevailing in the cell.
  • any malfunction or imminent damage to the energy storage cell with the aid of the pressure sensor can be detected at an early time in later operation of the cell, since the bursting membrane already has a slight pressure change in the form of a, compared to the housing of the energy storage cell, indicates greater surface change and this can be reliably determined by the pressure sensor, for example by means of strain gauges or laser interferometry.
  • the pressure sensor is preferably a strain gauge attached to the bursting membrane, which detects the deformation of the bursting membrane.
  • a strain gauge is a resistor that changes its resistance when stretched.
  • the pressure sensor can be configured as a so-called microelectromechanical system (MEMS), by which the pressure in the cell or the expansion of the bursting membrane is detected.
  • MEMS microelectromechanical system
  • the method steps c) and d), ie the generation and detection of a predetermined pressure within the housing are carried out at least twice at at least two different predetermined pressures. It is thereby achieved that the characteristic curve has a plurality of pairs of values composed in each case of a pressure value and a sensor signal, and thus an accurate determination of pressure values based on sensor signals generated by the pressure sensor over a pressure value range is possible.
  • the pressure value / sensor signal value pairs obtained during the calibration are interpolated and / or extrapolated so that a reliable determination of pressure values during operation of the cell is also possible with pressures or sensor signals. is possible between the pairs of values obtained during the calibration or outside the value pairs obtained.
  • a data storage device is introduced into the housing and the generated characteristic is stored in the data storage device.
  • the electrochemical energy storage cell has a computation device which is arranged in the housing and is set up based on at least one sensor signal generated by the pressure sensor when detecting at least one pressure in the interior of the housing and the characteristic stored in the data storage device the pressure sensor to determine the pressure value of the at least one detected pressure.
  • the entire pressure value determination can be carried out within the energy storage cell without having to supply or provide information, computing power and / or energy from the outside.
  • the electrochemical energy storage cell has a control device, which is set up to control the operation, in particular charging and / or discharging, of the energy storage cell as a function of the determined pressure value of the at least one detected pressure and / or to derive an information characterizing a state of the energy storage cell from the determined pressure value of the at least one detected pressure.
  • the energy storage cell has an integrated control, by means of which the operation of the cell can be monitored and controlled autonomously, ie without an additional external monitoring device.
  • Such an energy storage cell which can also be referred to as an intelligent cell (so-called smart cell), can already be used for any malfunctions or other problems that occur, which correspond to the pressure within the energy storage cell recognize it at an early stage and counteract it by taking suitable measures.
  • FIG 1 shows an example of an electrochemical energy storage cell.
  • Fig. 2 is a graph showing an example of the time history of pressure values and sensor signals.
  • FIG. 3 is a graphical representation of an example of a characteristic.
  • Fig. 1 shows an example of an electrochemical energy storage cell 1 in a simplified perspective view.
  • the energy storage cell 1 comprises a housing 2, which in the example shown, for example, By means of thermoforming, a cuboid vessel 2 "(so-called Can) and a lid 2 'thereon are provided.
  • a pressure sensor 3 and electrode and Separator füren are provided in the form of a so-called.
  • Electrode stack or -wickel which are not shown for reasons of clarity, however.
  • An electrolyte filling device 11 and / or an external pressure generating device 5 can be connected to the energy storage cell 1, preferably on the cover 2 'of the housing 2, in order to fill the housing 2 with an electrolyte or in the interior of the housing 2 a pressure to create.
  • the pressure sensor 3 is arranged on the inside of a bursting membrane 7 located on the cover 2 'of the housing 2 and is arranged via data lines 13 with a data storage device, preferably also located in the interior of the housing 2, in particular on the inside of the cover 2 - 8, computing device 9 and control device 10 connected.
  • a data storage device preferably also located in the interior of the housing 2, in particular on the inside of the cover 2 - 8, computing device 9 and control device 10 connected.
  • the pressure sensor 3 is also possible to integrate the pressure sensor 3 together with at least one of the devices 8 to 10 and / or at least two of the devices 8 to 10 on a common substrate or a common board.
  • the pressure sensor 3 and / or the data storage device 8, computing device 9 and / or control device 10 is supplied with electrical energy by the electrode stack or winding located in the housing 2. This is preferably possible as soon as the energy storage cell 1 is at least partially electrically charged.
  • an external supply device 6 for example a charging device provided for charging the energy storage device 1
  • an external supply device 6 may be provided to supply power to the pressure sensor 3 or the devices 8 to 10, in particular before a first charge cycle of the energy storage cell 1 guarantee.
  • the energy supply of the pressure sensor 3 or of the components 8 to 10 is preferably changed from the external supply device 6 to the energy storage cell 1 before closing the energy storage cell 1, so that the pressure sensor 3 or the devices 8 to 10 from the energy storage cell 1 are supplied with electrical energy themselves and can thus work independently.
  • the pressure sensor 3 is first introduced into the housing 2 before or after the introduction of an electrode stack or coil, and then, during the filling of the housing 2 with an electrolyte, at least a predetermined pressure is generated by the electrolyte filling device 11, which is detected by the pressure sensor 3.
  • the predetermined pressure is generated only after the filling of the housing 2 with the electrolyte by the external pressure generating device 5. This preferably takes place during and / or after the electrical charging of the energy storage cell 1.
  • the pressure sensor 3 detects the at least one predetermined pressure within the housing 2 and generates at least one corresponding sensor signal, which is transmitted to the computing device 9.
  • a plurality of different high predetermined pressures are generated, detected by the pressure sensor 3 and converted into corresponding sensor signals.
  • the computing device 9 On the basis of the different pressure values of the predetermined pressures and of the respectively obtained sensor signals of the pressure sensor 3, the computing device 9 generates a characteristic curve which is stored in the data storage device 8. This will be explained in more detail with reference to FIGS. 2 and 3.
  • the pressure profile has a step-like course in which, starting from an initial pressure value, three further different high pressure values are set, until finally the initial pressure value is set again.
  • the dotted line shows the sensor signals S respectively generated by the pressure sensor 3 in the detection of the pressures.
  • the timing of the sensor signals S is also step-like.
  • FIG. 3 shows a graphic representation of an example of a characteristic curve 15, which was determined on the basis of the time profile of the pressure values P and the associated sensor signals S shown in FIG.
  • the four different pressure values P represent abscissa values and the four associated signal values S ordinate values of the characteristic curve 15.
  • the characteristic line 15 reproduced by a solid line is intended to indicate that the characteristic curve 15 is preferably not only that during the calibration of the pressure sensor 3, in this case four, value pairs of pressure values P and sensor signals S may contain S, but also from the determined value pairs by means of interpolation and / or extrapolation calculated value pairs.
  • the characteristic curve 15 obtained in this way describes the relationship between sensor signals S, which are generated by the pressure sensor 3 when detecting a pressure prevailing inside the housing 2, and the corresponding pressure values P, in particular because the pressure sensor 3 detects itself the characteristic (calibration) is already in the housing 2 and any influences, such as due to individual position tolerances of the sensor 3 in the housing 2, on the Determination of the exact pressure values P have already flowed into the characteristic curve 15.
  • the pressure sensor 3 detects, for example, at certain time intervals or continuously, the pressure prevailing inside the housing 2 and generates corresponding sensor signals S. On the basis of the sensor signals S and the characteristic 15 stored in the data storage device 8 Calculator 9 the corresponding pressure values P.
  • the control device 10 is set up to control the operation of the energy storage cell 1, in particular charging and / or discharging, as a function of the determined pressure values and / or to derive information characterizing a state of the energy storage cell 1 from the determined pressure values. th and provide for the control of the operation of the energy storage cell 1 and / or output, for example in the form of a warning signal. Any problems and / or disturbances in the operation of the energy storage cell 1, such as imminent overheating or impending passage through the cell, can be detected quickly and reliably in this way and, if necessary, be remedied by appropriate control measures or at least reduced.
  • the pressure sensor 3 is arranged on the bursting membrane 7, which is adapted to deform elastically at internal pressures below a bursting pressure and upon reaching or exceeding the
  • the pressure sensor 3 is preferably configured to detect the internal pressure prevailing in the housing 2 by detecting the deformation dependent on the internal pressure, in particular stretching and / or compression, of the bursting membrane 7.
  • the pressure sensor 7 may, for example, be designed as so-called strain gauges or have a laser interferometer, by means of which even the smallest changes in the planicity or curvature of the rupture disk 7 can be detected reliably. LIST OF REFERENCE NUMBERS

Abstract

The invention relates to a method for producing an electrochemical energy storage cell, to an electrochemical energy storage cell, to a battery module and to a vehicle. The electrochemical energy storage cell has a housing, a pressure sensor which is arranged in the housing and is configured to sense a pressure, and to generate a corresponding sensor signal, and a data storage device which is arranged in the housing and in which a characteristic curve of the pressure sensor is stored, wherein the characteristic curve of the pressure sensor specifies a relationship between, on the one hand, at least one sensor signal generated by the pressure sensor during the sensing of at least a pressure within the housing and, on the other hand, the pressure value of the at least one pressure within the housing.

Description

VERFAHREN ZUR HERSTELLUNG EINER ELEKTROCHEMISCHEN ENERGIESPEICHERZELLE, ENERGIESPEICHERZELLE, BATTERIEMODUL  METHOD FOR PRODUCING AN ELECTROCHEMICAL ENERGY STORAGE CELL, ENERGY STORAGE CELL, BATTERY MODULE
UND FAHRZEUG  AND VEHICLE
Die Erfindung betrifft ein Verfahren zur Herstellung einer elektrochemischen Ener- giespeicherzelle, eine elektrochemische Energiespeicherzelle, ein Batteriemodul sowie ein Fahrzeug. The invention relates to a method for producing an electrochemical energy storage cell, an electrochemical energy storage cell, a battery module and a vehicle.
Elektrochemische Energiespeicherzellen, wie etwa Lithium-Ionen-Zellen, sind auf- grund ihrer im Vergleich zu Energiespeicherzellen anderen Typs hohen Energie- dichten im Bereich der sogenannten Elektromobilität sowohl bei Fahrzeugen mit reinem Elektroantrieb als auch bei Fahrzeugen mit Hybridantrieb von zentraler Be- deutung. Electrochemical energy storage cells, such as lithium-ion cells, are of major importance in the field of so-called electromobility, both in vehicles with pure electric drive and in vehicles with hybrid drive, because of their high energy densities in comparison to energy storage cells of a different type.
Um eine etwaige Überladung der Energiespeicherzellen und beispielsweise eine daraus resultierende Explosionsgefahr aufgrund einer mit der Überladung einherge- henden Temperatur- und Druckerhöhung in den Energiespeicherzellen frühzeitig zu detektieren und zu verhindern, können elektronische Schutzschaltungen eingesetzt werden. Dazu werden die Energiespeicherzellen während des Betriebs mittels eines Temperatur- bzw. Drucksensors überwacht. In order to early detect and prevent any overcharging of the energy storage cells and, for example, a resulting explosion risk due to a temperature and pressure increase associated with the overcharging in the energy storage cells, electronic protective circuits can be used. For this purpose, the energy storage cells are monitored during operation by means of a temperature or pressure sensor.
Es ist eine Aufgabe der Erfindung, die Zuverlässigkeit bei der Überwachung von elektrochemischen Energiespeicherzellen zu erhöhen. Diese Aufgabe wird gelöst durch ein Verfahren zur Herstellung einer elektrochemi- schen Energiespeicherzelle, eine elektrochemische Energiespeicherzelle, ein Batte- riemodul sowie ein Fahrzeug gemäß den Ansprüchen 1 , 9, 12 bzw. 13. It is an object of the invention to increase the reliability in the monitoring of electrochemical energy storage cells. This object is achieved by a method for producing an electrochemical energy storage cell, an electrochemical energy storage cell, a battery module and a vehicle according to claims 1, 9, 12 and 13, respectively.
Ein erfindungsgemäßes Verfahren zur Herstellung einer elektrochemischen Ener- giespeicherzelle weist folgende Schritte auf: A method according to the invention for producing an electrochemical energy storage cell has the following steps:
a) Bereitstellen eines Gehäuses der elektrochemischen Energiespeicherzelle; b) Einbringen eines Drucksensors, welcher dazu eingerichtet ist, einen Druck zu erfassen und ein entsprechendes Sensorsignal zu erzeugen, in das Gehäuse; c) Erzeugen mindestens eines vorbestimmten Drucks innerhalb des Gehäuses; d) Erfassen des mindestens einen vorbestimmten Drucks innerhalb des Gehäuses und Erzeugen mindestens eines entsprechenden Sensorsignals durch den Drucksensor; und a) providing a housing of the electrochemical energy storage cell; b) introducing a pressure sensor, which is adapted to detect a pressure and to generate a corresponding sensor signal, in the housing; c) generating at least one predetermined pressure within the housing; d) detecting the at least one predetermined pressure within the housing and generating at least one corresponding sensor signal by the pressure sensor; and
e) Erzeugen und Speichern einer Kennlinie des Drucksensors basierend auf dem Druckwert des mindestens einen vorbestimmten Drucks und dem mindestens einen vom Drucksensor erzeugten Sensorsignal. e) generating and storing a characteristic of the pressure sensor based on the pressure value of the at least one predetermined pressure and the at least one sensor signal generated by the pressure sensor.
Eine erfindungsgemäße elektrochemische Energiespeicherzelle weist ein Gehäuse, einen Drucksensor, welcher in dem Gehäuse angeordnet und dazu eingerichtet ist, einen Druck zu erfassen und ein entsprechendes Sensorsignal zu erzeugen, und eine Datenspeichereinrichtung auf, welche in dem Gehäuse angeordnet ist und in welcher eine Kennlinie des Drucksensors gespeichert ist, wobei die Kennlinie des Drucksensors einen Zusammenhang zwischen mindestens einem vom Drucksensor bei der Erfassung mindestens eines Drucks innerhalb des Gehäuses erzeugten Sensorsignal einerseits und dem Druckwert des mindestens einen Drucks innerhalb des Gehäuses andererseits angibt. An electrochemical energy storage cell according to the invention comprises a housing, a pressure sensor, which is arranged in the housing and adapted to detect a pressure and to generate a corresponding sensor signal, and a data storage device, which is arranged in the housing and in which a characteristic of the pressure sensor the characteristic of the pressure sensor indicates a relationship between at least one sensor signal generated by the pressure sensor when detecting at least one pressure within the housing and the pressure value of the at least one pressure within the housing.
Ein erfindungsgemäßes Batteriemodul weist mehrere erfindungsgemäße elektro- chemische Energiespeicherzellen auf. A battery module according to the invention has a plurality of inventive electrochemical energy storage cells.
Ein erfindungsgemäßes Fahrzeug, insbesondere Kraftfahrzeug, weist wenigstens eine erfindungsgemäße elektrochemische Energiespeicherzelle und/oder ein erfin- dungsgemäßes Batteriemodul auf. A vehicle according to the invention, in particular a motor vehicle, has at least one electrochemical energy storage cell according to the invention and / or a battery module according to the invention.
Ein Aspekt der Erfindung basiert auf dem Ansatz, einen Drucksensor, welcher wäh- rend des Betriebs den Innendruck der Energiespeicherzelle erfasst, während des Herstellungsprozesses in der Energiespeicherzelle zu kalibrieren, indem im Inneren der Energiespeicherzelle unterschiedliche Drücke mit bekannten Druckwerten er- zeugt und die dabei vom Drucksensor jeweils erzeugten Sensorsignale erfasst wer- den. Basierend auf jeweils aus einem Druckwert und dem entsprechenden Sensor- signal zusammengesetzten Wertepaaren wird eine Kennlinie gebildet, die den Zu- sammenhang zwischen Druckwerten von im Inneren der Energiespeicherzelle herr- schenden Drücken einerseits und entsprechenden Sensorsignalen andererseits beschreibt. Da die Kennlinie in situ ermittelt wird, d.h. erst nachdem der Druck- sensor während des Herstellungsprozesses der Zelle in die Zelle eingebracht wor- den ist, werden individuelle Gegebenheiten und/oder T oieranzen, beispielsweise hinsichtlich Anbringung und/oder Lage des Drucksensors in der jeweiligen Zelle, in der Kennlinie berücksichtigt, so dass diese den Zusammenhang zwischen den bei einer Druckerfassung im (späteren) Betrieb der Zelle erzeugten Sensorsignalen und den entsprechenden Druckwerten für jede Zelle bzw. jeden Drucksensor individuell und damit besonders genau wiedergibt. Dadurch kann während des Betriebs der Zelle der Druckwert, d.h. die Höhe, des jeweils aktuell vorherrschenden Drucks in der Zelle anhand des jeweils erzeugten Sensorsignals und der Kennlinie des Druck- sensors mit hoher Genauigkeit ermittelt werden. Durch die hierdurch mögliche genauere Druckmessung kann eine drohende Überla- dung und/oder Tiefenentladung der Energiespeicherzelle und/oder des Batteriemo- duls beim Aufladen bzw. Entladen rechtzeitig und mit höherer Zuverlässigkeit er fasst werden als etwa bei einer bloßen Betrachtung der Sensorsignale bzw. Druck- werte von vorab bzw. außerhalb der Zelle kalibrierten Drucksensoren. Entsprechend können zur Vermeidung einer Schädigung der Energiespeicherzelle und/oder des Batteriemoduls die jeweils erforderlichen Gegenmaßnahmen rechtzeitig eingeleitet werden. Beispielsweise kann bei Bedarf, z.B. bei einer drohenden Überladung oder Tiefentladung einer Energiespeicherzelle, der Ladezustand einer Energiespeicher- zelle durch von außen über Stromabnehmer zu- oder abgeführte Ladungen beein- flusst werden, etwa indem eine elektrische Stromquelle bzw. ein elektrischer Ver- braucher an jeweils einen Stromabnehmer, welche wiederum jeweils mit der Katho- de und der Anode der Energiespeicherzelle verbunden sind, angelegt bzw. ange- schlossen wird. One aspect of the invention is based on the approach of calibrating a pressure sensor which during operation detects the internal pressure of the energy storage cell during the production process in the energy storage cell by generating different pressures with known pressure values in the interior of the energy storage cell Pressure sensor respectively generated sensor signals are detected. Based on pairs of values composed of a pressure value and the corresponding sensor signal, a characteristic curve is formed which describes the relationship between pressure values of pressures prevailing in the interior of the energy storage cell on the one hand and corresponding sensor signals on the other hand. Since the characteristic curve is determined in situ, ie only after the pressure sensor has been introduced into the cell during the production process of the cell. is, are individual circumstances and / or T oieranzen, for example, with regard to attachment and / or location of the pressure sensor in the respective cell, taken into account in the characteristic, so that this the relationship between the sensor signals generated during a pressure detection in the (later) operation of the cell and the corresponding pressure values for each cell or each pressure sensor individually and thus reproduces particularly accurately. As a result, during operation of the cell, the pressure value, ie the height, of the currently prevailing pressure in the cell can be determined with high accuracy on the basis of the sensor signal generated in each case and the characteristic curve of the pressure sensor. As a result of the more precise pressure measurement possible as a result of this, imminent overcharging and / or deep discharge of the energy storage cell and / or the battery module during charging or discharging can be detected in good time and with greater reliability than, for example, a mere consideration of the sensor signals or pressure signals. values of pressure sensors calibrated in advance or outside the cell. Accordingly, in order to avoid damage to the energy storage cell and / or the battery module, the respectively required countermeasures can be initiated in good time. For example, if required, for example in the case of imminent overcharging or total discharge of an energy storage cell, the state of charge of an energy storage cell can be influenced by charges supplied or removed from the outside via current collectors, for example by an electrical power source or an electrical consumer at each a current collector, which in turn are each connected to the cathode and the anode of the energy storage cell, is applied or connected.
Insgesamt ermöglicht die Erfindung eine Erhöhung der Zuverlässigkeit bei der Überwachung von Energiespeicherzellen. Overall, the invention allows an increase in reliability in the monitoring of energy storage cells.
In einer bevorzugten Ausführung wird der mindestens eine vorbestimmte Druck während eines Befüllens des Gehäuses mit einem Elektrolyten erzeugt. Dies erlaubt eine Kalibrierung des Drucksensors während eines im Produktionsprozess der elektrochemischen Energiespeicherzelle ohnehin erforderlichen Schrittes, so dass keine zusätzliche Zeit oder nur geringfügig mehr Zeit für das Kalibrieren benötigt wird. In einer weiteren bevorzugten Ausführung wird der mindestens eine vorbestimmte Druck nach einem Befüllen des Gehäuses mit einem Elektrolyten, insbesondere während und/oder nach einem elektrischen Laden der Energiespeicherzelle, durch eine externe Druckerzeugungseinrichtung erzeugt. Die Kalibrierung des Druck- sensors erfolgt auch hierbei während des Produktionsprozesses der Zelle, vorzugs- weise vor einem Verschließen der Zelle und/oder vor der sog. Formierung. Nach dem Befüllen der Zelle sind die Druckverhältnisse in der Zelle besonders stabil, so dass der Zusammenhang zwischen unterschiedlichen Drücken einerseits und Sen- sorsignalen andererseits besonders genau erfasst werden kann. Falls die Zelle zu diesem Zeitpunkt gerade geladen wird und/oder bereits zumindest teilweise geladen ist, kann der Drucksensor über eine Ladestromversorgung bzw. durch die Zelle selbst mit elektrischer Energie versorgt werden, ohne dass zusätzliche Maßnahmen zur Stromversorgung des Sensors erforderlich sind. Hierdurch wird erreicht, dass keine zusätzliche Zeit oder nur geringfügig mehr Zeit für das Kalibrieren benötigt wird. In a preferred embodiment, the at least one predetermined pressure is generated during filling of the housing with an electrolyte. This allows a calibration of the pressure sensor during a step anyway required in the production process of the electrochemical energy storage cell, so that no additional time or only slightly more time is required for the calibration. In a further preferred embodiment, the at least one predetermined pressure is generated after an inflation of the housing with an electrolyte, in particular during and / or after an electrical charging of the energy storage cell, by an external pressure generating device. The calibration of the pressure sensor also takes place here during the production process of the cell, preferably before the cell is closed and / or before the so-called formation. After filling the cell, the pressure conditions in the cell are particularly stable, so that the relationship between different pressures on the one hand and sensor signals on the other hand can be detected particularly accurately. If the cell is being charged at this time and / or already at least partially charged, the pressure sensor via a charging power supply or by the cell itself can be supplied with electrical energy without additional measures to power the sensor are required. This ensures that no additional time or only slightly more time is required for the calibration.
In einer weiteren bevorzugten Ausführung wird der Drucksensor durch die elektro- chemische Energiespeicherzelle selbst oder durch eine externe Versorgungseinrich- tung mit elektrischer Energie versorgt. Durch die Versorgung des Drucksensors mit elektrischer Energie durch die Energiespeicherzelle wird erreicht, dass der Druck- sensor autark ist und damit sowohl während der Kalibrierung als auch während des Betriebs der Energiespeicherzelle ohne zusätzliche Verschaltung mit einer externen Energieversorgungseinrichtung betrieben werden kann. Eine externe Versorgungs- einrichtung bietet den Vorteil, dass der Drucksensor während des Herstellungspro- zesses der Energiespeicherzelle bereits mit Strom versorgt und kalibriert werden kann, wenn die Zelle noch nicht bzw. noch nicht ausreichend geladen ist. In a further preferred embodiment, the pressure sensor is supplied with electrical energy by the electrochemical energy storage cell itself or by an external supply device. Supplying the pressure sensor with electrical energy through the energy storage cell ensures that the pressure sensor is self-sufficient and thus can be operated both during calibration and during operation of the energy storage cell without additional connection to an external energy supply device. An external supply device offers the advantage that the pressure sensor can already be supplied with power and calibrated during the production process of the energy storage cell if the cell is not yet or not yet sufficiently charged.
In einer weiteren bevorzugten Ausführung wird bzw. ist der Drucksensor an einer am Gehäuse vorgesehenen Berstmembran angeordnet, welche dazu eingerichtet ist, bei Erreichen oder Überschreiten eines Berstdrucks innerhalb des Gehäuses zu brechen und ein Entweichen von, insbesondere gasförmigem, Elektrolyt aus dem Gehäuse zu ermöglichen. Vorzugsweise erfasst der Drucksensor den mindestens einen vorbestimmten Druck innerhalb des Gehäuses, indem er mindestens eine Dehnung der Berstmembran erfasst. Die Berstmembran, welche auch als Berst- scheibe bezeichnet wird, ist aufgrund ihres Materials und ihrer Dimensionierung dazu eingerichtet ist, sich innerhalb eines bestimmten Druckbereichs unterhalb des Berstdrucks elastisch zu verformen, wobei das Ausmaß der Verformung ein Maß für den in der Zelle herrschenden Druck darstellt. Durch Erfassen der Verformung der Berstmembran durch den Drucksensor erfasst dieser indirekt den Druck innerhalb der Zelle. Dadurch kann im späteren Betrieb der Zelle bereits zu einem frühen Zeit punkt eine eventuell auftretende Fehlfunktion bzw. drohende Beschädigung der Energiespeicherzelle mit Hilfe des Drucksensors erkannt werden, da die Berst- membran bereits eine geringe Druckänderung in Form einer, verglichen mit dem Gehäuse der Energiespeicherzelle, größeren Oberflächenänderung anzeigt und diese vom Drucksensor, etwa mittels Dehnungsmessstreifen oder Laserinterfero- metrie, zuverlässig ermittelt werden kann. Anhand der Kennlinie des Drucksensors und der Sensorsignale der jeweils erfassten Dehnung der Berstmembran kann so- mit der Druckwert des jeweils in der Energiespeicherzelle vorherrschenden Drucks einfach und genau ermittelt werden. Vorzugsweise handelt es sich bei dem Drucksensor um einen an der Berstmembran angebrachten Dehnungsmessstreifen, der die Verformung der Berstmembran er fasst. Ein Dehnungsmessstreifen ist ein Widerstand, der seinen Widerstandswert bei einer Dehnung verändert. Wird der Dehnungsmessstreifen gedehnt (positive Dehnung), dann nimmt sein Widerstand zu. Wird er gestaucht (negative Dehnung), dann nimmt sein Widerstand ab. Alternativ oder zusätzlich kann der Drucksensor als sog. mikroelektromechanisches System (MEMS) ausgestaltet sein, durch welches der Druck in der Zelle bzw. die Dehnung der Berstmembran erfasst wird. In a further preferred embodiment, the pressure sensor is or is arranged on a bursting membrane provided on the housing, which is adapted to break upon reaching or exceeding a bursting pressure within the housing and to allow escape of, in particular gaseous, electrolyte from the housing. Preferably, the pressure sensor detects the at least one predetermined pressure within the housing by detecting at least one strain of the bursting membrane. The bursting membrane, which is also called a burst disc, is due to its material and its dimensions is adapted to elastically deform within a certain pressure range below the bursting pressure, wherein the amount of deformation is a measure of the pressure prevailing in the cell. By detecting the deformation of the bursting membrane by the pressure sensor, this indirectly detects the pressure within the cell. As a result, any malfunction or imminent damage to the energy storage cell with the aid of the pressure sensor can be detected at an early time in later operation of the cell, since the bursting membrane already has a slight pressure change in the form of a, compared to the housing of the energy storage cell, indicates greater surface change and this can be reliably determined by the pressure sensor, for example by means of strain gauges or laser interferometry. On the basis of the characteristic curve of the pressure sensor and the sensor signals of the respective detected expansion of the bursting membrane, the pressure value of the pressure prevailing in each case in the energy storage cell can thus be determined simply and accurately. The pressure sensor is preferably a strain gauge attached to the bursting membrane, which detects the deformation of the bursting membrane. A strain gauge is a resistor that changes its resistance when stretched. If the strain gauge is stretched (positive strain), then its resistance increases. If he is compressed (negative stretching), then his resistance decreases. Alternatively or additionally, the pressure sensor can be configured as a so-called microelectromechanical system (MEMS), by which the pressure in the cell or the expansion of the bursting membrane is detected.
In einer weiteren bevorzugten Ausführung werden die Verfahrensschritte c) und d), also das Erzeugen und Erfassen eines vorbestimmten Drucks innerhalb des Ge- häuses, wenigstens zwei Mal bei wenigstens zwei unterschiedlichen vorbestimmten Drücken ausgeführt. Dadurch wird erreicht, dass die Kennlinie mehrere jeweils aus einem Druckwert und einem Sensorsignal zusammengesetzte Wertepaare aufweist und somit eine genaue Bestimmung von Druckwerten anhand von durch den Druck- sensor erzeugten Sensorsignalen über einen Druckwertebereich möglich ist. Vorzugsweise werden die bei der Kalibrierung erhaltenen Druckwert/Sensorsignal- Wertepaare interpoliert und/oder extrapoliert, so dass eine zuverlässige Ermittlung von Druckwerten während des Betriebs der Zelle auch bei Drücken bzw. Sensorsig- nalen möglich ist, die zwischen den bei der Kalibrierung erhaltenen Wertepaaren bzw. außerhalb der erhaltenen Wertepaare liegen. In a further preferred embodiment, the method steps c) and d), ie the generation and detection of a predetermined pressure within the housing, are carried out at least twice at at least two different predetermined pressures. It is thereby achieved that the characteristic curve has a plurality of pairs of values composed in each case of a pressure value and a sensor signal, and thus an accurate determination of pressure values based on sensor signals generated by the pressure sensor over a pressure value range is possible. Preferably, the pressure value / sensor signal value pairs obtained during the calibration are interpolated and / or extrapolated so that a reliable determination of pressure values during operation of the cell is also possible with pressures or sensor signals. is possible between the pairs of values obtained during the calibration or outside the value pairs obtained.
In einer weiteren bevorzugten Ausführung wird eine Datenspeichereinrichtung in das Gehäuse eingebracht und die erzeugte Kennlinie in der Datenspeichereinrich- tung gespeichert. Durch die Verwendung einer Datenspeichereinrichtung, in welcher die Kennlinie gespeichert ist und welche innerhalb des Gehäuses angeordnet ist, wird erreicht, dass der Drucksensor auf die gespeicherte Kennlinie innerhalb der Zelle zurückgreifen kann und somit keine zusätzliche elektrische bzw. elektronische Verbindung zu einer externen Datenspeichereinrichtung benötigt wird, um während des Betriebs der Zelle die Druckwerte des jeweils vorherrschenden Innendrucks mit hoher Genauigkeit zu ermitteln. In a further preferred embodiment, a data storage device is introduced into the housing and the generated characteristic is stored in the data storage device. By using a data storage device in which the characteristic is stored and which is arranged within the housing, it is achieved that the pressure sensor can access the stored characteristic within the cell and thus no additional electrical or electronic connection to an external data storage device is needed to determine the pressure values of the prevailing internal pressure with high accuracy during operation of the cell.
In einer weiteren bevorzugten Ausführung weist die elektrochemische Energiespei- cherzelle eine Recheneinrichtung auf, welche in dem Gehäuse angeordnet ist und dazu eingerichtet ist, anhand mindestens eines vom Drucksensor bei der Erfassung mindestens eines Drucks im Inneren des Gehäuses erzeugten Sensorsignals und der in der Datenspeichereinrichtung gespeicherten Kennlinie des Drucksensors den Druckwert des mindestens einen erfassten Drucks zu ermitteln. Die gesamte Druckwertermittlung kann hierbei innerhalb der Energiespeicherzelle durchgeführt werden, ohne dass Informationen, Rechenleistung und/oder Energie von außen zugeführt bzw. bereitgestellt werden müssen. In a further preferred embodiment, the electrochemical energy storage cell has a computation device which is arranged in the housing and is set up based on at least one sensor signal generated by the pressure sensor when detecting at least one pressure in the interior of the housing and the characteristic stored in the data storage device the pressure sensor to determine the pressure value of the at least one detected pressure. In this case, the entire pressure value determination can be carried out within the energy storage cell without having to supply or provide information, computing power and / or energy from the outside.
In einer weiteren bevorzugten Ausführung weist die elektrochemische Energiespei- cherzelle eine Steuerungseinrichtung auf, welche dazu eingerichtet ist, den Betrieb, insbesondere ein Laden und/oder Entladen, der Energiespeicherzelle in Abhängig- keit von dem ermittelten Druckwert des mindestens einen erfassten Drucks zu steu- ern und/oder eine einen Zustand der Energiespeicherzelle charakterisierende Infor- mation aus dem ermittelten Druckwert des mindestens einen erfassten Drucks ab- zuleiten. Dadurch verfügt die Energiespeicherzelle über eine integrierte Steuerung, durch die der Betrieb der Zelle autark, d.h. ohne eine zusätzliche externe Überwa- chungseinrichtung, überwacht und gesteuert werden kann. Eine solche Energie- speicherzelle, die auch als intelligente Zelle (sog. Smart Cell) bezeichnet werden kann, kann etwaige Störfunktionen oder andere auftretende Probleme, welche mit dem Druck innerhalb der Energiespeicherzelle korrespondieren, bereits zu einem frühen Zeitpunkt selbst erkennen und diesen durch geeignete Maßnahmen entge- genwirken. In a further preferred embodiment, the electrochemical energy storage cell has a control device, which is set up to control the operation, in particular charging and / or discharging, of the energy storage cell as a function of the determined pressure value of the at least one detected pressure and / or to derive an information characterizing a state of the energy storage cell from the determined pressure value of the at least one detected pressure. As a result, the energy storage cell has an integrated control, by means of which the operation of the cell can be monitored and controlled autonomously, ie without an additional external monitoring device. Such an energy storage cell, which can also be referred to as an intelligent cell (so-called smart cell), can already be used for any malfunctions or other problems that occur, which correspond to the pressure within the energy storage cell recognize it at an early stage and counteract it by taking suitable measures.
Weitere Merkmale, Vorteile und Anwendungsmöglichkeiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung im Zusammenhang mit den Figuren. Es zeigen: Other features, advantages and applications of the invention will become apparent from the following description taken in conjunction with the figures. Show it:
Fig. 1 ein Beispiel einer elektrochemischen Energiespeicherzelle; 1 shows an example of an electrochemical energy storage cell.
Fig. 2 eine graphische Darstellung eines Beispiels des zeitlichen Verlaufs von Druckwerten und Sensorsignalen; und Fig. 2 is a graph showing an example of the time history of pressure values and sensor signals; and
Fig. 3 eine graphische Darstellung eines Beispiels einer Kennlinie. Fig. 1 zeigt ein Beispiel einer elektrochemischen Energiespeicherzelle 1 in einer vereinfachten perspektivischen Darstellung. Die Energiespeicherzelle 1 weist ein Gehäuse 2 auf, welches im dargestellten Beispiel ein, z.B. mittels Tiefziehen herge- stelltes, quaderförmiges Gefäß 2“ (sog. Can) und einen darauf befindlichen De- ckel 2‘ aufweist. Im Gehäuse 2 befinden sich ein Drucksensor 3 sowie Elektroden- und Separatorschichten, beispielsweise in Form eines sog. Elektrodenstapels oder -Wickels, die aus Anschaulichkeitsgründen jedoch nicht dargestellt sind. An der Energiespeicherzelle 1 , vorzugsweise am Deckel 2‘ des Gehäuses 2, kann eine Elektrolytbefüllungseinrichtung 11 und/oder eine externe Druckerzeugungseinrich- tung 5 angeschlossen werden, um das Gehäuse 2 mit einem Elektrolyten zu befül- len bzw. im Inneren des Gehäuses 2 einen Druck zu erzeugen. 3 is a graphical representation of an example of a characteristic. Fig. 1 shows an example of an electrochemical energy storage cell 1 in a simplified perspective view. The energy storage cell 1 comprises a housing 2, which in the example shown, for example, By means of thermoforming, a cuboid vessel 2 "(so-called Can) and a lid 2 'thereon are provided. In the housing 2 are a pressure sensor 3 and electrode and Separatorschichten, for example in the form of a so-called. Electrode stack or -wickel, which are not shown for reasons of clarity, however. An electrolyte filling device 11 and / or an external pressure generating device 5 can be connected to the energy storage cell 1, preferably on the cover 2 'of the housing 2, in order to fill the housing 2 with an electrolyte or in the interior of the housing 2 a pressure to create.
Der Drucksensor 3 ist in diesem Beispiel an der Innenseite einer am Deckel 2‘ des Gehäuses 2 befindlichen Berstmembran 7 angeordnet und über Signalleitungen 13 mit einer, vorzugsweise ebenfalls im Innern des Gehäuses 2 befindlichen, insbe- sondere an der Innenseite des Deckels 2 angeordneten, Datenspeichereinrich- tung 8, Recheneinrichtung 9 und Steuerungseinrichtung 10 verbunden. Grundsätz- lich ist es auch möglich, den Drucksensor 3 zusammen mit zumindest einer der Ein- richtungen 8 bis 10 und/oder zumindest zwei der Einrichtungen 8 bis 10 auf einem gemeinsamen Substrat oder einer gemeinsamen Platine zu integrieren. Vorzugsweise wird der Drucksensor 3 und/oder die Datenspeichereinrichtung 8, Recheneinrichtung 9 und/oder Steuerungseinrichtung 10 durch den im Gehäuse 2 befindlichen Elektrodenstapel bzw. -Wickel mit elektrischer Energie versorgt. Dies ist vorzugsweise möglich, sobald die Energiespeicherzelle 1 wenigstens teilweise elektrisch geladen ist. In this example, the pressure sensor 3 is arranged on the inside of a bursting membrane 7 located on the cover 2 'of the housing 2 and is arranged via data lines 13 with a data storage device, preferably also located in the interior of the housing 2, in particular on the inside of the cover 2 - 8, computing device 9 and control device 10 connected. In principle, it is also possible to integrate the pressure sensor 3 together with at least one of the devices 8 to 10 and / or at least two of the devices 8 to 10 on a common substrate or a common board. Preferably, the pressure sensor 3 and / or the data storage device 8, computing device 9 and / or control device 10 is supplied with electrical energy by the electrode stack or winding located in the housing 2. This is preferably possible as soon as the energy storage cell 1 is at least partially electrically charged.
Alternativ oder zusätzlich kann aber auch eine externe Versorgungseinrichtung 6, beispielsweise ein für das Laden der Energiespeichereinrichtung 1 vorgesehenes Ladegerät, vorgesehen sein, um eine Stromversorgung des Drucksensors 3 bzw. der genannten Einrichtungen 8 bis 10, insbesondere vor einem ersten Ladezyklus der Energiespeicherzelle 1 , zu gewährleisten. Vorzugsweise wird jedoch vor einem Verschließen der Energiespeicherzelle 1 die Energieversorgung des Druck- sensors 3 bzw. der Komponenten 8 bis 10 von der externen Versorgungseinrich- tung 6 auf die Energiespeicherzelle 1 geändert, sodass der Drucksensor 3 bzw. die Einrichtungen 8 bis 10 von der Energiespeicherzelle 1 selbst mit elektrischer Ener- gie versorgt werden und damit autark arbeiten kann bzw. können. Alternatively or additionally, however, an external supply device 6, for example a charging device provided for charging the energy storage device 1, may be provided to supply power to the pressure sensor 3 or the devices 8 to 10, in particular before a first charge cycle of the energy storage cell 1 guarantee. However, the energy supply of the pressure sensor 3 or of the components 8 to 10 is preferably changed from the external supply device 6 to the energy storage cell 1 before closing the energy storage cell 1, so that the pressure sensor 3 or the devices 8 to 10 from the energy storage cell 1 are supplied with electrical energy themselves and can thus work independently.
Bei der Herstellung der Energiespeicherzelle 1 wird vor oder nach dem Einbringen eines Elektrodenstapels oder -Wickels zunächst der Drucksensor 3 in das Gehäu- se 2 eingebracht und dann während des Befüllens des Gehäuses 2 mit einem Elekt rolyten durch die Elektrolytbefüllungseinrichtung 11 mindestens ein vorbestimmter Druck erzeugt, der vom Drucksensor 3 erfasst wird. In the production of the energy storage cell 1, the pressure sensor 3 is first introduced into the housing 2 before or after the introduction of an electrode stack or coil, and then, during the filling of the housing 2 with an electrolyte, at least a predetermined pressure is generated by the electrolyte filling device 11, which is detected by the pressure sensor 3.
Alternativ oder zusätzlich wird der vorbestimmte Druck erst nach dem Befüllen des Gehäuses 2 mit dem Elektrolyten durch die externe Druckerzeugungseinrichtung 5 erzeugt. Dies geschieht vorzugsweise während und/oder nach dem elektrischen Laden der Energiespeicherzelle 1. Der Drucksensor 3 erfasst den mindestens einen vorbestimmten Druck innerhalb des Gehäuses 2 und erzeugt mindestens ein entsprechendes Sensorsignal, wel- ches an die Recheneinrichtung 9 übermittelt wird. Vorzugsweise besteht zwischen der Recheneinrichtung 9 und der Elektrolytbefüllungseinrichtung 11 bzw. der exter- nen Druckerzeugungseinrichtung 5 zumindest temporär eine Datenverbindung, durch welche der genaue Druckwert des jeweils vorbestimmten Drucks an die Re- cheneinrichtung 9 übermittelt bzw. zur Verfügung gestellt werden kann. Vorzugsweise werden mehrere unterschiedlich hohe vorbestimmte Drücke erzeugt, durch den Drucksensor 3 erfasst und in entsprechende Sensorsignale umgewan- delt. Alternatively or additionally, the predetermined pressure is generated only after the filling of the housing 2 with the electrolyte by the external pressure generating device 5. This preferably takes place during and / or after the electrical charging of the energy storage cell 1. The pressure sensor 3 detects the at least one predetermined pressure within the housing 2 and generates at least one corresponding sensor signal, which is transmitted to the computing device 9. Preferably, there is at least temporarily a data connection between the computing device 9 and the electrolyte filling device 11 or the external pressure generating device 5, by means of which the exact pressure value of the respective predetermined pressure can be transmitted or made available to the computing device 9. Preferably, a plurality of different high predetermined pressures are generated, detected by the pressure sensor 3 and converted into corresponding sensor signals.
Auf Basis der unterschiedlichen Druckwerte der vorbestimmten Drücke und der je- weils erhaltenen Sensorsignale des Drucksensors 3 erzeugt die Recheneinrich- tung 9 eine Kennlinie, welche in der Datenspeichereinrichtung 8 gespeichert wird. Dies wird nachfolgend anhand von Fig. 2 und 3 näher erläutert. On the basis of the different pressure values of the predetermined pressures and of the respectively obtained sensor signals of the pressure sensor 3, the computing device 9 generates a characteristic curve which is stored in the data storage device 8. This will be explained in more detail with reference to FIGS. 2 and 3.
Fig. 2 zeigt ein Beispiel eines zeitlichen Verlaufs von Druckwerten P (sog. Druckpro- fil) von im Inneren des Gehäuses 3 erzeugten vorbestimmten Drücken. Das Druck- profil hat im dargestellten Beispiel einen treppenartigen Verlauf, bei welchem aus- gehend von einem Anfangsdruckwert drei weitere unterschiedliche hohe Druckwerte eingestellt werden, bis schließlich wieder der Anfangsdruckwert eingestellt wird. Die gepunktete Linie zeigt die vom Drucksensor 3 bei der Erfassung der Drücke jeweils erzeugten Sensorsignale S. Wie das Druckprofil der Druckwerte P ist auch der zeit- liehe Verlauf der Sensorsignale S treppenartig. 2 shows an example of a time profile of pressure values P (so-called pressure profile) of predetermined pressures generated in the interior of the housing 3. In the example shown, the pressure profile has a step-like course in which, starting from an initial pressure value, three further different high pressure values are set, until finally the initial pressure value is set again. The dotted line shows the sensor signals S respectively generated by the pressure sensor 3 in the detection of the pressures. Like the pressure profile of the pressure values P, the timing of the sensor signals S is also step-like.
Fig. 3 zeigt eine graphische Darstellung eines Beispiels einer Kennlinie 15, welche auf Basis des in Fig. 2 dargestellten zeitlichen Verlaufs der Druckwerte P und der zugehörigen Sensorsignale S ermittelt wurde. In der gezeigten graphischen Darstel- lung bilden die vier unterschiedlichen Druckwerte P Abszissenwerte und die vier zugehörigen Signalwerte S Ordinaten werte der Kennlinie 15. Durch die durch eine durchgezogene Linie wiedergegebene Kennlinie 15 soll angedeutet werden, dass die Kennlinie 15 vorzugsweise nicht nur die bei der Kalibrierung des Drucksensors 3 ermittelten, in diesem Fall vier, Wertepaare aus Druckwerten P und Sensorsigna- len S enthalten kann, sondern auch aus den ermittelten Wertepaaren mittels Inter- polation und/oder Extrapolation errechnete Wertepaare. FIG. 3 shows a graphic representation of an example of a characteristic curve 15, which was determined on the basis of the time profile of the pressure values P and the associated sensor signals S shown in FIG. In the graphic representation shown, the four different pressure values P represent abscissa values and the four associated signal values S ordinate values of the characteristic curve 15. The characteristic line 15 reproduced by a solid line is intended to indicate that the characteristic curve 15 is preferably not only that during the calibration of the pressure sensor 3, in this case four, value pairs of pressure values P and sensor signals S may contain S, but also from the determined value pairs by means of interpolation and / or extrapolation calculated value pairs.
Die auf diese Weise erhaltene Kennlinie 15 beschreibt den Zusammenhang zwi- schen Sensorsignalen S, die vom Drucksensor 3 bei der Erfassung eines im Innern des Gehäuses 2 vorherrschenden Drucks erzeugt werden, und den entsprechenden Druckwerten P besonders genau, da sich der Drucksensor 3 bei der Ermittlung der Kennlinie (Kalibrierung) bereits im Gehäuse 2 befindet und etwaige Einflüsse, etwa aufgrund von individuellen Lagetoleranzen des Sensors 3 im Gehäuse 2, auf die Bestimmung der genauen Druckwerte P bereits in die Kennlinie 15 eingeflossen sind. The characteristic curve 15 obtained in this way describes the relationship between sensor signals S, which are generated by the pressure sensor 3 when detecting a pressure prevailing inside the housing 2, and the corresponding pressure values P, in particular because the pressure sensor 3 detects itself the characteristic (calibration) is already in the housing 2 and any influences, such as due to individual position tolerances of the sensor 3 in the housing 2, on the Determination of the exact pressure values P have already flowed into the characteristic curve 15.
Im späteren Betrieb der Energiespeicherzelle 1 erfasst der Drucksensor 3, bei- spielsweise in bestimmten Zeitintervallen oder kontinuierlich, den innerhalb des Ge- häuses 2 herrschenden Druck und erzeugt entsprechende Sensorsignale S. Anhand der Sensorsignale S und der in der Datenspeichereinrichtung 8 gespeicherten Kennlinie 15 ermittelt die Recheneinrichtung 9 die entsprechenden Druckwerte P. During later operation of the energy storage cell 1, the pressure sensor 3 detects, for example, at certain time intervals or continuously, the pressure prevailing inside the housing 2 and generates corresponding sensor signals S. On the basis of the sensor signals S and the characteristic 15 stored in the data storage device 8 Calculator 9 the corresponding pressure values P.
Die Steuerungseinrichtung 10 ist dazu eingerichtet, den Betrieb der Energiespei- cherzelle 1 , insbesondere ein Laden und/oder Entladen, in Abhängigkeit von den ermittelten Druckwerten zu steuern und/oder eine einen Zustand der Energiespei- cherzelle 1 charakterisierende Information aus den ermittelten Druckwerten abzulei- ten und für die Steuerung des Betriebs der Energiespeicherzelle 1 bereitzustellen und/oder auszugeben, z.B. in Form eines Warnsignals. Etwaige Probleme und/oder Störungen im Betrieb der Energiespeicherzelle 1 , etwa eine drohende Überhitzung oder ein bevorstehendes Durchgehen der Zelle, können auf diese Weise schnell und zuverlässig erkannt und gegebenenfalls durch entsprechende Steuerungsmaß- nahmen behoben oder zumindest vermindert werden. The control device 10 is set up to control the operation of the energy storage cell 1, in particular charging and / or discharging, as a function of the determined pressure values and / or to derive information characterizing a state of the energy storage cell 1 from the determined pressure values. th and provide for the control of the operation of the energy storage cell 1 and / or output, for example in the form of a warning signal. Any problems and / or disturbances in the operation of the energy storage cell 1, such as imminent overheating or impending passage through the cell, can be detected quickly and reliably in this way and, if necessary, be remedied by appropriate control measures or at least reduced.
Bei dem in Fig. 1 gezeigten Beispiel ist der Drucksensor 3 an der Berstmembran 7 angeordnet, welche dazu eingerichtet ist, sich bei Innendrücken unterhalb eines Berstdrucks elastisch zu verformen und bei Erreichen oder Überschreiten desIn the example shown in Fig. 1, the pressure sensor 3 is arranged on the bursting membrane 7, which is adapted to deform elastically at internal pressures below a bursting pressure and upon reaching or exceeding the
Berstdrucks zu brechen und ein Entweichen von, insbesondere gasförmigem, Elekt- rolyt aus dem Gehäuse 2 zu ermöglichen. Vorzugsweise ist der Drucksensor 3 dazu eingerichtet, den im Gehäuse 2 jeweils vorherrschenden Innendruck durch Detektie- ren der vom Innendruck abhängigen Verformung, insbesondere Dehnung und/oder Stauchung, der Berstmembran 7 zu erfassen. Dazu kann der Drucksensor 7 bei- spielsweise als sog. Dehnungsmessstreifen ausgebildet sein oder ein Laserinterfe- rometer aufweisen, durch welches selbst kleinste Veränderungen in der Planizität bzw. Wölbung der Berstscheibe 7 zuverlässig erfasst werden können. Bezugszeichenliste Bursting pressure to break and allow escape of, in particular gaseous, electrolyte from the housing 2. The pressure sensor 3 is preferably configured to detect the internal pressure prevailing in the housing 2 by detecting the deformation dependent on the internal pressure, in particular stretching and / or compression, of the bursting membrane 7. For this purpose, the pressure sensor 7 may, for example, be designed as so-called strain gauges or have a laser interferometer, by means of which even the smallest changes in the planicity or curvature of the rupture disk 7 can be detected reliably. LIST OF REFERENCE NUMBERS
1 elektrochemische Energiespeicherzelle1 electrochemical energy storage cell
2 Gehäuse 2 housings
2 Deckel  2 lids
2 Gefäß 2 vessel
3 Drucksensor  3 pressure sensor
5 externe Druckerzeugungseinrichtung 5 external pressure generating device
6 externe Versorgungseinrichtung6 external supply device
7 Berstmembran 7 bursting membrane
8 Datenspeichereinrichtung  8 data storage device
9 Recheneinrichtung  9 computing device
10 Steuerungseinrichtung  10 control device
1 1 Elektrolytbefüllungseinrichtung 13 Signalleitung 1 1 electrolyte filling device 13 signal line
15 Kennlinie 15 characteristic

Claims

ANSPRÜCHE
1 . Verfahren zur Herstellung einer elektrochemischen Energiespeicherzelle (1 ) mit folgenden Schritten: 1 . Method for producing an electrochemical energy storage cell (1) with the following steps:
a) Bereitstellen eines Gehäuses (2) der elektrochemischen Energiespei- cherzelle (1 );  a) providing a housing (2) of the electrochemical energy storage cell (1);
b) Einbringen eines Drucksensors (3), welcher dazu eingerichtet ist, einen Druck zu erfassen und ein entsprechendes Sensorsignal zu erzeugen, in das Gehäuse (2);  b) introducing a pressure sensor (3), which is adapted to detect a pressure and to generate a corresponding sensor signal, in the housing (2);
c) Erzeugen mindestens eines vorbestimmten Drucks innerhalb des Ge- häuses (2);  c) generating at least one predetermined pressure within the housing (2);
d) Erfassen des mindestens einen vorbestimmten Drucks innerhalb des Gehäuses (2) und Erzeugen mindestens eines entsprechenden Sensor- signals (S) durch den Drucksensor (3); und  d) detecting the at least one predetermined pressure within the housing (2) and generating at least one corresponding sensor signal (S) by the pressure sensor (3); and
e) Erzeugen und Speichern einer Kennlinie (15) des Drucksensors (3) ba- sierend auf dem Druckwert (P) des mindestens einen vorbestimmten Drucks und dem mindestens einen vom Drucksensor (3) erzeugten Sensorsignal (S).  e) generating and storing a characteristic curve (15) of the pressure sensor (3) based on the pressure value (P) of the at least one predetermined pressure and the at least one sensor signal (S) generated by the pressure sensor (3).
2. Verfahren nach Anspruch 1 , wobei der mindestens eine vorbestimmte Druck während eines Befüllens des Gehäuses (2) mit einem Elektrolyten erzeugt wird. 2. The method of claim 1, wherein the at least one predetermined pressure is generated during filling of the housing (2) with an electrolyte.
3. Verfahren nach Anspruch 1 oder 2, wobei der mindestens eine vorbestimmte Druck nach einem Befüllen des Gehäuses (2) mit einem Elektrolyten, insbe- sondere während und/oder nach einem elektrischen Laden der Energiespei- cherzelle (1 ), durch eine externe Druckerzeugungseinrichtung (5) erzeugt wird. 3. The method of claim 1 or 2, wherein the at least one predetermined pressure after a filling of the housing (2) with an electrolyte, in particular during and / or after an electrical charging of the energy storage cell (1), by an external pressure generating device (5) is generated.
4. Verfahren nach wenigstens einem der vorhergehenden Ansprüche, wobei der Drucksensor (3) durch die elektrochemische Energiespeicherzelle (1 ) selbst oder durch eine externe Versorgungseinrichtung (6) mit elektrischer Energie versorgt wird. 4. The method according to at least one of the preceding claims, wherein the pressure sensor (3) by the electrochemical energy storage cell (1) itself or by an external supply device (6) is supplied with electrical energy.
5. Verfahren nach wenigstens einem der vorhergehenden Ansprüche, wobei der Drucksensor (3) an einer am Gehäuse (2) vorgesehenen Berstmemb- ran (7) angeordnet wird, welche dazu eingerichtet ist, bei Erreichen oder Überschreiten eines Berstdrucks innerhalb des Gehäuses (2) zu brechen und ein Entweichen von, insbesondere gasförmigem, Elektrolyt aus dem5. The method according to at least one of the preceding claims, wherein the pressure sensor (3) on a housing (2) provided Berstmemb- ran (7) is arranged, which is adapted to reach when reaching or exceeding a bursting pressure within the housing (2). to break and an escape of, in particular gaseous, electrolyte from the
Gehäuse (2) zu ermöglichen. To allow housing (2).
6. Verfahren nach Anspruch 5, wobei der Drucksensor (3) den mindestens ei- nen vorbestimmten Druck innerhalb des Gehäuses (2) erfasst, indem er mindestens eine Dehnung der Berstmembran (7) erfasst. 6. The method of claim 5, wherein the pressure sensor detects the at least one predetermined pressure within the housing by detecting at least one expansion of the bursting membrane.
7. Verfahren nach wenigstens einem der vorhergehenden Ansprüche, wobei die Verfahrensschritte c) und d) wenigstens zwei Mal bei wenigstens zwei unterschiedlichen vorbestimmten Drücken ausgeführt werden. 7. The method according to at least one of the preceding claims, wherein the method steps c) and d) are performed at least two times at least two different predetermined pressures.
8. Verfahren nach wenigstens einem der vorhergehenden Ansprüche, mit fol gendem zusätzlichen Schritt: 8. The method according to at least one of the preceding claims, with fol lowing the additional step:
- Einbringen einer Datenspeichereinrichtung (8) in das Gehäuse (2), wobei die erzeugte Kennlinie (15) in der Datenspeichereinrichtung (8) ge- speichert wird.  - Inserting a data storage device (8) in the housing (2), wherein the generated characteristic (15) in the data storage device (8) is stored.
9. Elektrochemische Energiespeicherzelle (1 ) mit 9. Electrochemical energy storage cell (1) with
einem Gehäuse (2);  a housing (2);
- einem Drucksensor (3), welcher in dem Gehäuse (2) angeordnet und dazu eingerichtet ist, einen Druck zu erfassen und ein entsprechendes Sensorsignal zu erzeugen; und  - A pressure sensor (3) which in the housing (2) is arranged and adapted to detect a pressure and to generate a corresponding sensor signal; and
einer Datenspeichereinrichtung (8), welche in dem Gehäuse (2) ange- ordnet ist und in welcher eine Kennlinie (15) des Drucksensors (3) ge- speichert ist, wobei die Kennlinie (15) des Drucksensors (3) einen Zu- sammenhang zwischen mindestens einem vom Drucksensor (3) bei der Erfassung mindestens eines Drucks innerhalb des Gehäuses (2) er zeugten Sensorsignal (S) einerseits und dem Druckwert (P) des mindes- tens einen Drucks innerhalb des Gehäuses (2) andererseits angibt. a data storage device (8), which is arranged in the housing (2) and in which a characteristic curve (15) of the pressure sensor (3) is stored, wherein the characteristic curve (15) of the pressure sensor (3) has a connection between at least one of the pressure sensor (3) at the detection of at least one pressure within the housing (2) he testified sensor signal (S) on the one hand and the pressure value (P) of at least one pressure within the housing (2) on the other hand indicates.
10. Elektrochemische Energiespeicherzelle (1 ) nach Anspruch 9 mit einer Re- cheneinrichtung (9), welche in dem Gehäuse (2) angeordnet ist und dazu eingerichtet ist, anhand mindestens eines vom Drucksensor (3) bei der Er fassung mindestens eines Drucks im Inneren des Gehäuses (2) erzeugten Sensorsignals (S) und der in der Datenspeichereinrichtung (8) gespeicherten10. An electrochemical energy storage cell (1) according to claim 9 with a computing device (9) which is arranged in the housing (2) and is adapted to at least one of the pressure sensor (3) in the He Constitution of at least one pressure in the interior the housing (2) generated sensor signal (S) and stored in the data storage device (8)
Kennlinie (15) des Drucksensors (3) den Druckwert (P) des mindestens ei- nen erfassten Drucks zu ermitteln. Characteristic (15) of the pressure sensor (3) to determine the pressure value (P) of the at least one NEN detected pressure.
1 1. Elektrochemische Energiespeicherzelle (1 ) nach Anspruch 10 mit einer Steuerungseinrichtung (10), welche dazu eingerichtet ist, 1 1. Electrochemical energy storage cell (1) according to claim 10 with a control device (10) which is adapted to
- den Betrieb, insbesondere ein Laden und/oder Entladen, der Energie- speicherzelle (1 ) in Abhängigkeit von dem ermittelten Druckwert (P) des mindestens einen erfassten Drucks zu steuern und/oder  - To control the operation, in particular a loading and / or unloading, the energy storage cell (1) in dependence on the determined pressure value (P) of the at least one detected pressure and / or
eine einen Zustand der Energiespeicherzelle (1 ) charakterisierende In- formation aus dem ermittelten Druckwert (P) des mindestens einen er- fassten Drucks abzuleiten.  deriving information characterizing a state of the energy storage cell (1) from the determined pressure value (P) of the at least one detected pressure.
12. Batteriemodul mit mehreren elektrochemischen Energiespeicherzellen (1 ) nach einem der Ansprüche 9 bis 11. 12. Battery module with a plurality of electrochemical energy storage cells (1) according to one of claims 9 to 11.
13. Fahrzeug, insbesondere Kraftfahrzeug, mit wenigstens einer elektrochemi- schen Energiespeicherzelle (1 ) nach einem der Ansprüche 9 bis 11 und/oder einem Batteriemodul nach Anspruch 12. 13. Vehicle, in particular motor vehicle, with at least one electrochemical energy storage cell (1) according to one of claims 9 to 11 and / or a battery module according to claim 12.
PCT/EP2018/082089 2017-11-23 2018-11-21 Method for producing an electrochemical energy storage cell, energy storage cell, battery module and vehicle WO2019101797A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017220923.2 2017-11-23
DE102017220923.2A DE102017220923A1 (en) 2017-11-23 2017-11-23 Method for producing an electrochemical energy storage cell, energy storage cell, battery module and vehicle

Publications (1)

Publication Number Publication Date
WO2019101797A1 true WO2019101797A1 (en) 2019-05-31

Family

ID=64572310

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/082089 WO2019101797A1 (en) 2017-11-23 2018-11-21 Method for producing an electrochemical energy storage cell, energy storage cell, battery module and vehicle

Country Status (2)

Country Link
DE (1) DE102017220923A1 (en)
WO (1) WO2019101797A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3867199A (en) * 1972-06-05 1975-02-18 Communications Satellite Corp Nickel hydrogen cell
DE102010007076A1 (en) * 2010-02-06 2011-08-11 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 80686 Electric energy storage
DE102012203444A1 (en) * 2012-03-05 2013-09-05 Robert Bosch Gmbh Sensor device for a battery cell, battery cell for an electrical energy storage and method for monitoring a battery cell
DE102013216076A1 (en) * 2013-08-14 2015-02-19 Robert Bosch Gmbh Battery cell and battery system with at least one battery cell
DE102017108708A1 (en) * 2016-05-03 2017-11-09 Ford Global Technologies, Llc SENSITIVITY-RELATED SOC AND SOH MONITORING OF BATTERY CELLS

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007063188A1 (en) * 2007-12-20 2009-06-25 Daimler Ag Battery and method for operating a battery
US20100292942A1 (en) * 2009-05-18 2010-11-18 Lonnie Calvin Golf Embedded algorithms for vehicular batteries
DE102012209271A1 (en) * 2012-06-01 2013-12-05 Robert Bosch Gmbh Battery management system for a battery cell with pressure-sensitive film sensor
DE102015002573A1 (en) * 2015-03-02 2016-09-08 Daimler Ag Method and device for checking the tightness of a housing of an electrical component
DE102015016361A1 (en) * 2015-12-17 2016-06-09 Daimler Ag Method for determining a state of charge and aging of an electric battery
US20180040926A1 (en) * 2016-08-05 2018-02-08 Infineon Technologies Ag Indirect battery pressure measurement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3867199A (en) * 1972-06-05 1975-02-18 Communications Satellite Corp Nickel hydrogen cell
DE102010007076A1 (en) * 2010-02-06 2011-08-11 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 80686 Electric energy storage
DE102012203444A1 (en) * 2012-03-05 2013-09-05 Robert Bosch Gmbh Sensor device for a battery cell, battery cell for an electrical energy storage and method for monitoring a battery cell
DE102013216076A1 (en) * 2013-08-14 2015-02-19 Robert Bosch Gmbh Battery cell and battery system with at least one battery cell
DE102017108708A1 (en) * 2016-05-03 2017-11-09 Ford Global Technologies, Llc SENSITIVITY-RELATED SOC AND SOH MONITORING OF BATTERY CELLS

Also Published As

Publication number Publication date
DE102017220923A1 (en) 2019-05-23

Similar Documents

Publication Publication Date Title
DE102012209271A1 (en) Battery management system for a battery cell with pressure-sensitive film sensor
EP3489703B1 (en) Method for determining a current charge level of a battery, battery assembly and motor vehicle
DE102017117077A1 (en) Indirect battery pressure measurement
DE102012207999A1 (en) Sheath foil for a galvanic cell, electrochemical storage, electrochemical storage system, flexible foil for a sheath of a galvanic cell and method for determining a state quantity of an electrochemical storage
DE102012223480A1 (en) Battery cell with a device for monitoring at least one parameter of the battery cell
DE102012200414A1 (en) Method and device for determining a state of charge of an electrical energy store
DE102013010311A1 (en) Method for determining the state of individual battery cells of a high-voltage battery and system therefor
DE102013206189B4 (en) Determining a state of charge of a rechargeable battery
DE102014200678A1 (en) Method for operating a battery
DE102005025616A1 (en) Energy store`s fuel cell voltage monitoring/controlling method for motor vehicle on-board supply system, involves charging/discharging cells based on difference between determined voltage of group of cells and regulated reference voltage
WO2016177488A1 (en) Method for detecting a proper connection of at least one energy store to an on-board electrical system
DE102017009448A1 (en) Method for determining a self-discharge of a battery with at least one battery cell
DE102018209324A1 (en) Monitoring of batteries
WO2019101797A1 (en) Method for producing an electrochemical energy storage cell, energy storage cell, battery module and vehicle
DE102018209325A1 (en) Measurements on batteries
WO2018224330A1 (en) Method and apparatus for operating an electrical energy accumulator system, and electrical energy accumulator system comprising said apparatus, and corresponding use thereof
DE102009054547B4 (en) Determining the internal resistance of a battery cell of a traction battery
EP3154115B1 (en) Battery cell fault detection
EP3596800B1 (en) Charging an accumulator
WO2016113099A1 (en) Method for monitoring a battery and monitoring device
DE102016222320A1 (en) Battery unit, battery system and method for operating a battery unit and / or a battery system
WO2018114226A1 (en) High-voltage battery for a motor vehicle, in particular a car
DE102020213771A1 (en) Method for monitoring an energy source in an on-board network
DE102014202616A1 (en) Method for determining the shelf life of a battery
DE102016224551A1 (en) Method, machine-readable storage medium and electronic control unit for operating an electrical energy storage system and corresponding electrical energy storage system

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: 18812086

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18812086

Country of ref document: EP

Kind code of ref document: A1